U.S. patent application number 11/612860 was filed with the patent office on 2007-05-10 for patient immobilization device.
Invention is credited to John A. Helmsderfer, Brian Tomcany.
Application Number | 20070101501 11/612860 |
Document ID | / |
Family ID | 27760339 |
Filed Date | 2007-05-10 |
United States Patent
Application |
20070101501 |
Kind Code |
A1 |
Tomcany; Brian ; et
al. |
May 10, 2007 |
PATIENT IMMOBILIZATION DEVICE
Abstract
A patient immobilization device comprises a backboard having a
front side and a back side, and a pair of opposing paddles slidably
mounted on the backboard. The paddles are configured to move
between a storage position and a support position, to support the
head of a patient. Each paddle has a leg portion depending
therefrom and extends through a respective slot formed in the
backboard between the front and back and sides. A spanning portion
of the paddle depends from the leg portion and engages the back
side of the backboard to secure the paddle to the backboard. The
spanning portion moves in a generally arcuate path between the
storage and support positions.
Inventors: |
Tomcany; Brian;
(Strongsville, OH) ; Helmsderfer; John A.;
(Cincinnati, OH) |
Correspondence
Address: |
WOOD, HERRON & EVANS, LLP
2700 CAREW TOWER
441 VINE STREET
CINCINNATI
OH
45202
US
|
Family ID: |
27760339 |
Appl. No.: |
11/612860 |
Filed: |
December 19, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11103281 |
Apr 11, 2005 |
7165278 |
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11612860 |
Dec 19, 2006 |
|
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|
10335523 |
Dec 31, 2002 |
7036167 |
|
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11103281 |
Apr 11, 2005 |
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60359622 |
Feb 26, 2002 |
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Current U.S.
Class: |
5/626 ;
128/870 |
Current CPC
Class: |
A61G 1/04 20130101; A61F
5/3707 20130101; A61G 1/044 20130101; A61G 1/01 20130101 |
Class at
Publication: |
005/626 ;
128/870 |
International
Class: |
A61G 1/04 20060101
A61G001/04 |
Claims
1. A patient immobilization device comprising: a backboard having a
front side and a back side; a pair of opposing paddles slidably
mounted on the backboard and configured to move between a storage
position and a support position; at least one leg portion depending
from a paddle and extending through a respective slot in the
backboard; a cam structure coupled with the leg portion and
engaging the back side of the backboard when the paddle is moved to
the support position to secure the paddle in place.
2. A patient immobilization device comprising: a backboard having a
front side and a back side; the front side of the backboard
including a raised area for supporting the head of a patient.
3. The patient immobilization device of claim 2 further comprising
a pair of opposing paddles slidably mounted on the backboard and
configured, in a support position, to support the head of a
patient.
4. The patient immobilization device of claim 3 wherein said raised
area has recessed areas therein for receiving the paddles in a
storage position.
5. The patient immobilization device of claim 2 wherein said raised
area has an indent portion to receive the head of the patient.
6. The patient immobilization device of claim 2 wherein said raised
area is integrally formed with the backboard.
7. The patient immobilization device of claim 2 wherein said raised
area includes a separate piece secured to the backboard.
Description
RELATED APPLICATIONS
[0001] This application is a divisional patent application of, and
claims priority to, U.S. patent application Ser. No. 11/103,281,
filed Apr. 11, 2005, and entitled "Patient Immobilization Device,"
which is a divisional application and claims priority to U.S.
patent application Ser. No. 10/335,523, filed Dec. 31, 2002, and
entitled "Patient Immobilization Device," now U.S. Pat. No.
7,036,167, which patent and application claim priority to
Provisional Application Ser. No. 60/359,622, filed Feb. 26, 2002,
and entitled "Backboard with Head Immobilizer," which patent and
applications are all incorporated herein by reference in their
entireties.
FIELD OF THE INVENTION
[0002] This invention relates generally to a patient immobilization
device including a backboard and head immobilizer used to support
and immobilize injured patients.
BACKGROUND OF THE INVENTION
[0003] In accidents involving apparent injury to the head, neck,
and/or spine, the patient is immobilized for treatment and
transport. Specifically, the head and cervical spine areas of the
patient are routinely immobilized to prevent further injury during
transport to a medical facility. For such immobilization, devices
such as rigid backboards are typically used to support and assist
in immobilizing the patient during this time. A head immobilization
device or immobilizer is used with the backboard. For example, the
patient is placed on a board and stiff pillows or blocks are placed
tightly on either side of his head. A combination of headstraps,
chinstraps, and tapes are then tightly secured over the
pillows/blocks and the board to fixedly hold the patient's head in
place on the board.
[0004] Currently, there are several typical types of head
immobilizers in use that are incorporated generally with a flat
backboard. One type of head immobilization system utilizes a pair
of reusable blocks, which are formed of a pliant, yet supportive
material such as rigid foam or a suitable vinyl material.
Generally, such blocks are secured to a board with hook and loop
fastening structures, such as Velcro.TM..
[0005] Another type of immobilizer is disposable and utilizes
inexpensive cardboard, which is manipulated to form a support
structure for the head and neck. Generally, such a cardboard
material is temporarily coupled to a backboard with an adhesive
material. Other types of head immobilization systems utilize a
combination of reusable and disposable elements that may be
temporarily coupled to a backboard.
[0006] Although such systems have proven suitable for use with a
backboard to immobilize a patient, they present other problems.
While reusable foam or vinyl blocks may be relatively inexpensive,
due to reuse, they must be repeatedly cleaned and maintained after
each use to prevent the transmission of unsafe pathogens, either
through blood or other bodily fluid, such as vomit. Repeated
cleaning of the blocks may cause premature deterioration of the
blocks and their covering or outer skin. Also, foam material can
effectively turn into a sponge, thus trapping blood-borne pathogens
and other pathogens. As such, after a certain amount of use, even
reusable blocks will need to be replaced.
[0007] Another problem with such reusable blocks is that they are
difficult to store when not in use. Emergency medical vehicles
provide little excess storage space for equipment and materials.
Therefore, generally, the reusable blocks are stored in a location
that is remote from the tall narrow opening provided for backboard
storage, such as in an ambulance. Separation of key pieces of the
patient immobilization equipment for the purpose of storage can
often lead to lost or misplaced items. This is particularly
critical at an accident or medical emergency when the retrieval
time may be critical for the patient's health and well being.
Accident scenes are often chaotic environments involving multiple
emergency medical service providers. Therefore, any lost time
involved in gathering up all the pieces necessary for head and neck
support and patient immobilization is particularly undesirable.
[0008] Furthermore, because the blocks are separate pieces from the
board, they often become lost or are mistakenly collected by other
medical providers, such as at an accident scene or during equipment
recollection at a medical facility. As may be appreciated, patients
may come into a hospital emergency room, supported and immobilized
on the equipment of several rescue teams. The rescue teams then
return to the scene of the accident for other patients or victims,
or go out on other calls, and they leave the equipment at the
hospital with their patients. After the equipment is removed, it is
often placed in a common area for the various teams to recover.
During such recovery, one team or unit may inadvertently grab the
equipment of another unit.
[0009] Single-use, disposable head immobilization devices and
systems do have some advantages over reusable systems in that they
are generally smaller, are easier to store in an ambulance, and do
not have to be recovered because they are discarded after one use.
Furthermore, since they are not reused, they do not have to be
cleaned and they do not present a significant risk with respect to
transmission of unsafe bodily fluids from one patient to the next.
However, because they are single-use devices, an emergency medical
service provider must purchase and store a sufficient amount so as
not to run out during response to an emergency situation. This
requires frequent purchases, control of inventory at a central
storage area, and distribution of the devices to all the vehicles
that would use the devices. This essentially increases the overall
cost of the equipment for an emergency service provider.
[0010] Furthermore, because such single-use devices often utilize
adhesives for attachment to a backboard, repeated attachments
require the removal and cleaning of the board proximate the
adhesive. Repeated cleaning of the adhesive portions of the device
after each use becomes a nuisance for the user.
[0011] Another drawback with disposal head immobilization devices
is that they often use cardboard as their primary construction
material. Many patients and the public, in general, do not perceive
cardboard as a particularly robust material as compared with other
materials used to make emergency medical equipment, such as rigid
plastic used to make backboards and cervical collars. Patient and
public perception of high quality care and equipment materials is
an important factor in providing satisfactory service from
emergency medical providers. Notwithstanding perception, the
robustness of the devices themselves is important. Some patients
may require intubation tubes to assist with breathing. Intubated
patients who dislodge their tubes would have to be immediately
attended to in order to maintain an unobstructed airway. One
prevalent cause of a dislodged intubation tube is movement,
particularly head movement, which can occur when a patient is
panicking or is having a seizure. Therefore, it is important to
have robust head immobilization devices that are sufficiently
coupled with the backboard in order to keep patients from
dislodging their intubation tubes.
[0012] Therefore, there exists a need for a patient immobilization
device which addresses these issues. The present invention
addresses various of the above drawbacks in the prior art and
provides other advantages to assist in the care of patients
requiring head and neck immobilization.
SUMMARY OF THE INVENTION
[0013] The patient immobilization device, the present invention,
comprises a backboard having a front side and a back side.
Generally, the patient is placed on the front side while the back
side rests against a surface, such as the ground. A pair of
opposing paddles are slidably mounted on the backboard and are
configured to move between a storage position up against the
backboard in a support position where they support the head and
neck of a patient lying on the backboard. Each paddle has a leg
portion depending therefrom and extending through a respective slot
formed in the backboard between the front and back sides. Securing
the paddle with the backboard is a spanning portion that depends
from the leg portion and engages the back side of the backboard.
When the paddle is moved between the storage position and the
support position, the spanning portion moves in a generally arcuate
path. In that way, while the paddle is held in place in the storage
and support positions, it is freely movable between those
positions, as the spanning portion moves in an arcuate path away
from the backboard.
[0014] In one embodiment of the invention, index structures are
utilized to secure the paddles into place in the support position.
The index structure may be positioned on a front or a back side of
the backboard. On the front side of the backboard, the index
structure is engaged by the body of the paddle. On the back side of
the backboard, the index structure may be engaged by the spanning
portion of the paddle. In one embodiment, the spanning portion is a
dowel that extends outwardly from a leg portion or between multiple
leg portions. The paddle or spanning portion engages an index
structure in the form of a plurality of grooves. Preferably, the
grooves are open-ended and open into slots formed through the
backboard so that the grooves may be easily cleaned and do not trap
blood or other debris.
[0015] In an alternative embodiment of the invention, a friction
engagement of the paddle and the backboard, rather than an index
structure, ensures that the paddle is locked and placed into the
support position. In one embodiment, a cam structure is coupled
with a leg portion of the paddle and engages the back side of the
backboard when the paddle is moved to the support position to
secure the paddle into place. When the paddle is moved between the
storage position and the support position, the cam structure is
disengaged and the paddle may be slid to the desired position on
the backboard to accommodate the width of the patient's head.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and
constitute a part of this specification, illustrate embodiments of
the invention and, together with a general description of the
invention given above, and the detailed description of the
embodiments given below, serve to explain the principles of the
invention.
[0017] FIG. 1 is a perspective view of one embodiment of the
present invention.
[0018] FIG. 1A is a side view, in cross-section, of a paddle of the
present invention, in a storage position.
[0019] FIG. 1B is a side view, similar to Figure a!, of a paddle
moving between a storage position and a support position.
[0020] FIG. 1C is a side view, in cross-section similar to FIG. 1A,
of a paddle in the support position.
[0021] FIG. 1D is a perspective side view of an embodiment of a
paddle of the invention.
[0022] FIG. 2 is a partial perspective view of one embodiment of
the invention illustrating an immobilized patient.
[0023] FIG. 3 is a perspective view of an alternative embodiment of
the present invention.
[0024] FIG. 4 is a bottom plan view of one embodiment of the
backboard of the present invention.
[0025] FIG. 5 is a cross-sectional view along lines 5-5 of FIG.
4.
[0026] FIG. 6 is a perspective view of an alternative embodiment of
the present invention.
[0027] FIG. 7 is a perspective view of an embodiment of the
invention illustrating paddles in the storage position.
[0028] FIG. 8 is a side view, in partial cross-section, of a paddle
of the invention in the support position.
[0029] FIG. 9 is a perspective view of an alternative embodiment of
the present invention.
[0030] FIG. 10 is a side view, in partial cross-section, of an
alternative embodiment of the invention illustrating the paddle in
the support position.
[0031] FIG. 11 is a perspective view of an alternative embodiment
of the present invention with paddles in the storage position.
[0032] FIG. 12 is a side view, in partial cross-section, of an
alternative paddle of the present invention.
[0033] FIG. 13 is a side view, in partial cross-section, of another
alternative paddle of the present invention.
[0034] FIG. 14 is a side view, in partial cross-section, of an
alternative embodiment of the present invention.
[0035] FIG. 15 is a perspective view of an alternative embodiment
of the present invention, with the exemplary paddles removed for
clarity.
[0036] FIG. 16 is a partial cut-away perspective view of an
alternative index structure of the present invention.
[0037] FIG. 17 is a partial cross-sectional view of an alternative
embodiment of the invention.
[0038] FIG. 18 is an end cross-sectional view of another embodiment
of the invention.
[0039] FIG. 19 is a side cross-sectional view of the embodiment in
FIG. 18.
[0040] FIG. 20 is an end cross-sectional view of another embodiment
of the present invention.
DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION
[0041] Referring to FIG. 1, a perspective view of a patient
immobilization device 10 of the invention is illustrated.
Generally, such a device comprises a backboard or backboard portion
12, having a top side or front side 14, and a bottom side or back
side 16. In use, a patient would generally be placed on the front
side 14, with their feet at the foot end 18 of the backboard and
their head at the head end 20 of the backboard. For securing the
head and neck of a patient, the invention utilizes a pair of
opposing paddles 22a and 22b, which are slidably mounted on the
backboard 12, and are configured, in a support position, to support
the head and neck of a patient. Embodiments of the paddles 22a, 22b
are illustrated in the support position in FIG. 1.
[0042] Referring to FIG. 2, the head 23 and neck 25 of the patient
26 are secured and immobilized between the paddles during use. The
body of the patient 26 lies along the length of the backboard 12,
and often is secured to the backboard with straps, tape or other
securement structures (not shown). As illustrated in FIGS. 1A, 1B,
and 7, and discussed herein below, the paddles are movable between
a support position or upright position, as illustrated in FIG. 1,
and a storage position or flat position (see FIG. 7) for storing
the device 10 when not in use.
[0043] The backboard 12 can be made out of wood, plastic, or any
other suitable, and preferably light weight, material for
supporting a patient with their head and neck immobilized between
the paddles 22a, 22b.
[0044] The paddles may be made of a suitable rigid and light weight
material, such as wood or plastic. For example, a polypropylene
plastic, or high density polyethylene (HDPE) might be suitable.
Paddles 22a, 22b include a layer or portion 28 of a conformable
material for providing cushioning and comfort to the head 23 of the
patient while providing a level of conformability to the paddles,
for better securement and immobilization of the head and neck. For
example, the layer 28 might be made of a conventional foam, such as
a polyurethane foam, covered in a protective skin for cleanability.
The protective skin 29 on the foam 28 provides an impermeable
membrane for resisting the collection of bodily fluids and
bacteria. Such a foam material is desirable both for its durability
and its resistance to extreme temperatures and harsh chemicals,
such as disinfectants.
[0045] To provide further comfort for an immobilized patient, a
cushion 30 or a cushioned area between the paddles 22a, 22b might
be used for cushioning the back of the head 23 of the patient. When
a patient 26 is secured with the inventive device 10, as
illustrated in FIG. 2, the backboard 12 may then be lifted
utilizing hand holes 32, as are conventional with backboards.
[0046] Referring to FIG. 3, the layer 28 or layer material, may be
removable, such as for cleaning purposes. For example, the cushions
23 might be held to the paddles 22a, 22b by a suitable adhesive, by
hook/loop fasteners, or by physically sliding the layers into
tracks (not shown) formed within the paddles. Other suitable
securement methods may also be utilized to removably secure the
layers 28 with the paddles 22a, 22b. Preferably, the material
utilized to form the paddles and any conformable layers 28 herewith
is x-ray translucent so that x-rays may be taken with the patient
in a stabilized position, as illustrated in FIG. 2.
[0047] The paddles 22a, 22b and associated conformable layers 28
have openings 34 formed therein so that the patient may hear
better, such as for hearing instructions from a care giver or
emergency medical personnel. Often overlooked during patient
transport is the patient's ability to hear. The ear holes 34 are
free from obstructions, thus decreasing the possibility of
miscommunication with an injured patient.
[0048] Furthermore, the openings 34 allow visual inspection of the
ears, or fluid coming from the ears, which is often indicative of
head trauma. The ear holes, or openings 34, are placed to allow for
greater visualization of a patient's ear. Ear holes 34 allow for
better visualization and touch by medical personnel. In that way,
they provide important diagnostic information about the type and
extent of the injury by the type and amount of any fluid drainage
of the ear. In one embodiment, the ear openings or ear holes 34
have an aspect ratio (i.e., the ratio of the depth or thickness of
the paddle at opening 34 to the width or length of the opening 34),
conducive to better hearing.
[0049] In an alternative embodiment of the paddles, as illustrated
in FIG. 13, the paddle might be split into multiple sections for
visual and manual examination. One section is movable to a storage
position to expose a portion of the head and/or neck while the
other section remains in a support position to support the head
and/or neck. Paddle 22c, FIG. 13, includes two sections: 36 and 37,
which may be coupled together with a coupling structure such as a
clasp, key, or other structure. For example, in FIG. 13, rotatable
keys 38 are shown that rotate into appropriately formed key slots
39, formed in sections 36, 37. The keys 38 in slots 39 assure that
the paddle sections stay together to form the unitary paddle 22c
for immobilizing the head and neck of a patient. When it is
desirable to physically examine the neck or part of the head, the
appropriate section of paddles 22c may be uncoupled and folded to a
storage position to allow access to a portion of the head or neck.
The other section remains in the support position to continue to
support the head and neck. Then, the section can be folded back up
into a support position, and secured to form a unitary paddle
22c.
[0050] The shapes of the paddles, which are shown generally in a
side view to resemble the shape of a "D" or "O", provides support
for both the temporal and parietal areas of the skull, while also
providing support for the zygomatic arch and any cervical collar
utilized on the patient, as illustrated in FIG. 2. To secure the
patient's head and neck between the paddles and to hold the paddles
in a support position against the head and neck of the patient, one
or more straps 40 or other securement structures are utilized. The
straps span between the paddles, as illustrated in FIG. 2 and hold
them in the support position. In accordance with one aspect of the
invention, the straps 40 are integral with the device 10 and remain
with it even when stored. In that way, the necessary straps are
always with the device and do not have to be separately stored and
retrieved. In the embodiment shown in FIGS. 1 and 2, one end of the
straps is secured to the device 10, while a free end may be spanned
between the paddles, based upon the width of the patient's head and
the separation of the paddles. Securement, adjustability, and
storage of such straps 40 are discussed herein below, in accordance
with other aspects of the invention. Also, as noted below, other
securement structures (i.e., tape, separate straps) might be
utilized.
[0051] In accordance with one aspect of the present invention, the
paddles 22a, 22b are secured to the backboard 12, and remain with
the device 10 not only when in use, but also when it is stored. To
that end, the paddles are movable from a support position, as
illustrated in FIGS. 1 and 2, to a storage position, as illustrated
in FIGS. 1A and 7. In one embodiment of the invention, the paddles
are essentially rotatably mounted with respect to the backboard,
and rotate between the storage positions and support about axes,
which are generally parallel with the longitudinal axis of the
backboard. Referring to FIGS. 1A, 1B, and 1C, the rotation of the
paddles in one embodiment is illustrated. As discussed below,
portions of the paddles, which extend through the board and along
the back side, travel in a generally arcuate path between the
storage and the support position. Referring to FIG. 7, in one
aspect of the invention, the backboard, proximate the head end 20,
forms a recess 42 to receive the paddles 22a, 22b in the storage
position so that the paddles are generally flush with or below the
front side surface 43 of the backboard proximate the head end 20.
As is illustrated in FIG. 7, a raised area of the backboard is
formed proximate to the head end to create such a recess to receive
the stored paddles. Alternatively, the backboard 12 might be molded
so as to form indents into the board to receive the paddles. For
example, the entire thickness of the backboard might match that
shown at the head end in the embodiment illustrated in FIGS. 1, 2,
and 7 with a recessed area 42 formed therein for the paddles. The
paddles 22a, 22b and the recessed area 42 may be appropriately
configured and dimensioned to provide an interference fit for the
paddles to keep them in the storage position until needed for use.
For example, an interference or friction fit at the edges 46 of the
paddle might keep them in the recessed area 42 until they are
pulled upwardly to a storage position. Alternatively, some kind of
latching or securement mechanism might be used to keep the paddles
in place.
[0052] In accordance with another aspect of the present invention,
the opposing paddles 22a, 22b are also slidably mounted with
respect to the backboard to adjust their positions on the
backboard. When the paddles are pulled up from the storage position
and toward the support position, they may then be freely slid
toward each other or apart to adjust to the width of the patient's
head, neck, or any other medical gear or items attached thereto.
Generally, in the storage position, the paddles are at 0 degrees
with respect to the front side 14 of the backboard, or with respect
to the overall plane of the backboard. In the support position, as
illustrated in FIGS. 1 and 2, the paddles are approximately
generally perpendicular to the front side 14 or to the plane of the
backboard 12. Of course, the paddles may be angled somewhat from a
perpendicular position, and it is not critical that they are at 90
degrees with respect to the plane of the backboard in the support
position. In accordance with an aspect of the invention, the
paddles are configured so that generally when they are oriented at
an angle between the range of approximately 20 degrees to 70
degrees from the plane of the backboard, they may be slid freely
together and apart for proper adjustment. Of course, angled outside
this range, they may slide as well, just not as freely. Once in the
support position or perpendicular position, they engage a
respective index structure, as discussed herein below, to lock the
paddles at a desired separation for support of the patient's head
23 and neck 25 as illustrated in FIG. 2.
[0053] Turning now to FIGS. 1A, 1B and 1C, the paddles include one
or more leg portions 50 that extend or depend from the
head-engaging section or body of the paddle. Referring to FIG. 1A,
a cross-sectional side view of a paddle 22a is illustrated showing
a leg portion 50 depending from a head-engaging portion or body 51
of the paddle. The leg portion 50 extends at an angle with respect
to a plane 53 formed by body 51 of the paddle. In one embodiment,
leg portion 50 extends generally approximately 45 degrees with
respect to a plane 53 formed by paddle body 51. To accommodate and
accept the leg portion or portion of the paddle, respective slots
56 are formed in the backboard proximate to each paddle and
specifically proximate to the leg portions dependent therefrom (See
FIG. 1). The number of slots may vary, as discussed below. For
example, the embodiment illustrated in FIGS. 1 and 2 utilizes a
pair of slots per paddle corresponding to the pair of leg portions
depending from the paddles. The slots extend generally transverse
to a longitudinal axis of the board.
[0054] Referring to FIG. 1D, two leg portions 50 are shown
extending from paddle 22a. The paddles also include spanning
portions 60 that depend from the leg portions and engage the
backboard to secure the paddle with the backboard. In the
embodiment illustrated in FIGS. 1, and 1A-1C, the spanning portion
60 of the paddle is in the form of a pin or dowel 60, which spans
between the leg portions 50 of the paddle. In the embodiment of
FIG. 1, the spanning portion 60 spans generally along the back side
16 of the backboard, securing the paddle to the backboard (See FIG.
8). Furthermore, as noted below, the spanning portion 60 prevents
the various paddles from being over-rotated in the support position
so that they continue to remain at their desired support angle
(e.g. 90 degrees) and to support the head and neck of a patient
even when the backboard is turned on its side.
[0055] The spanning portion 60 of the paddle, such as the dowel or
pin illustrated in FIGS. 1A-1C, allows the paddle to be moved
transversely on the backboard to space the paddles apart or to move
them closer together to accommodate the patient. When the paddles
are rotated upwardly from the storage position (FIG. 1A) and
generally upwardly through a range of approximately 20 degrees to
70 degrees above the plane of the backboard (FIG. 1B), the paddle
may slide freely transversely on the board as illustrated by arrows
62 in FIGS. 1A, 1B. As shown in FIG. 1C, when the paddle is moved
to the support position, the spanning portion 60 engages the
backboard, such as by engaging the back side 16 of the backboard,
and along with other portions of the paddle, prevents the paddle
from being over-rotated in the direction of arrow 64 significantly
past a desirable support position, such as a generally
perpendicular position. In one embodiment, it is desirable that the
paddle is prevented from movement beyond approximately 20 degrees
from the perpendicular or beyond approximately 110.degree.. Of
course, the paddles might be confined even closer to the
perpendicular, like under approximately +10 degrees or +5 degrees
from that position. The spanning portion is held into position by
the leg portions 50 of the paddle, which have appropriate openings
formed therein. That is, the dowel in the illustrated embodiment is
a separate part slid into appropriate openings formed in the leg
portions. The dowel has a head 55 (See FIGS. 1C, 8) to secure it at
one end. The spanning portion or dowel is then locked into place by
securing the other end of the dowel with clips or other structures
57 (See FIGS. 1C, 8). Alternatively, the spanning portion might be
integrally formed with the leg portions of the paddle to span
between the leg portions and secure the paddle with the backboard.
Again, although two leg portions are shown for each paddle, a
greater or lesser number of leg portions may be utilized with
suitable spanning portions for engaging the backboard to secure the
paddle to the backboard. As noted, spanning portion may be integral
with the leg portions, such as being molded with the leg portions.
In the embodiment of the paddle as illustrated in the Figures, the
leg portions are generally molded or formed integral with the
paddle which as being molded with the paddle. Alternatively, they
might be separately formed similar to the spanning portion 60, then
secured to the paddle body 51. Preferably, any securing structures
such as screws or bolts, which couple portions of the paddle
together, are x-ray translucent.
[0056] In accordance with one aspect of the invention, in order to
provide the necessary clearance between the spanning portion 60 and
the paddle body 51 for the purposes of movement of the paddles
closer together or further apart, the spanning portion moves in a
generally arcuate path between the storage and support positions.
Referring to FIGS. 1A, 1B, and 1C, in the storage position, the
spanning portion 60, such as the dowel, rests against the back side
16 of the backboard. Generally, friction, and the engagement of the
paddle body 51 and spanning portion 60 against the sides of the
backboard, prevents or hinders movement of the paddle laterally on
the board when it is in a storage position and the backboard is
stored. When the paddle is folded up or hinged up toward the
support position, as illustrated in FIG. 1B, the spanning portion
60 travels a generally arcuate path away from the back side 16, and
then again toward the back side 16 when the paddle is locked in the
support position, as illustrated in FIG. 1C. That is, as
illustrated in FIG. 1B, movement of the spanning portion along the
generally arcuate path 63 moves the spanning portion 60 away from
the back side 16 to allow for lateral movement of the paddles, such
as in the direction of arrow 62. The spanning portion is disengaged
from the backboard and the paddle is free to move or slide. Such
generally arcuate movement of the spanning portion provides for
easy adjustment of the paddles when they are between the storage
and support positions. The arcuate path also ensures that the
spanning portion subsequently engages the back side of the
backboard to ensure that the paddles are held appropriately or
locked in their storage and support positions. Usually, depending
upon the positioning of the paddles, the spanning portions 60 will
not take a purely arcuate path, as illustrated in FIG. 1B, because
the paddles will also be moved laterally, once they are out of the
storage position. For example, the spanning portion 60 might move
arcuately to the position illustrated in FIG. 1B, and then might
move in a linear fashion (arrow 62) as the paddles are adjusted to
their proper widths for supporting the head and neck of a patient.
Then, as the paddles are moved the rest of the way up to the
storage position, as illustrated in FIG. 1C, a generally arcuate
path might again be traversed by the spanning portion 60.
Therefore, as used herein, the term "generally arcuate path" does
not require that the arc be continuous, but only that the spanning
portion move away from the back side of the backboard and then back
toward that back side for movement between the storage and support
positions.
[0057] Referring to FIG. 8, a side view of the paddle is shown, in
partial cross-section, wherein the paddle is in the support
position. As illustrated, the spanning portion 60 spans between the
leg portions 50 and engages a portion of the backboard, such as the
back side 16 of the backboard to secure the paddle and prevent the
paddle from rotating in a storage position generally beyond
perpendicular or some other desired angle. In accordance with one
aspect of the present invention, the spanning portion engages the
backboard when the paddle is moved to the support position and
restricts movement of the paddle in the support position
significantly beyond 90 degrees from the plane of the backboard.
Preferably, in the illustrated embodiment, the spanning portion 60
maintains the paddle generally close to perpendicular. In that way,
the neck and head of a patient are maintained in a desirable
position on the backboard when the backboard is moved, and
particularly when it is turned on its side. As may be appreciated,
with the head secured between the paddles, such as with straps 40,
turning the backboard 12 on its side, such as to move the patient
between a doorway or some other opening, puts significant stress
upon the upper portions of the paddle pair because the weight of
the head cantilevers from that paddle. In the present invention,
with the paddles prevented from rotating in the support position
significantly beyond perpendicular or 90 degrees; this ensures that
proper immobilization of the head and neck is maintained during
movement of the patient. Generally, when the straps 40 are secured
into position snugly on the head and neck of a patient, the paddles
will be secured in a generally perpendicular position, ensuring
full contact between the sides of the paddles and the head and neck
of the patient. Proper utilization of the securement straps and
proper positioning of the paddles on the sides of the head ensure
that the paddles will generally not be less than approximately
perpendicular or 90 degrees from the plane of the backboard.
[0058] In accordance with another aspect of the present invention,
in the support position, the paddles are locked into position at
the proper spacing, utilizing index structures that are engaged by
the paddles. The paddles generally engage their respective index
structures when the paddles are moved to the support position and
thereby are locked relative to each other to support a patient's
head and neck. Preferably, they are locked in a position that is
centered about the center of the longitudinal axis of the backboard
so that the patient's head and neck are centered on the backboard
with the patient.
[0059] Referring to FIG. 1, index structures 70 are illustrated
positioned on a front side of the backboard. The index structures
70 of FIG. 1 are in the form of a plurality of grooves (See FIG.
7), which extend longitudinally with respect to the backboard's
long axis. The grooves 72 define various index points along the
index structure for positioning of the paddles 22a, 22b. The
grooves 72 may be formed as individual index structures for each
paddle, as illustrated in the Figures. Alternatively, they may be
part of a continuous index structure with a portion of the index
structure being utilized for each respective paddle. The embodiment
in FIG. 1 shows two individual index structures 70, one for each
paddle. The index structures are positioned proximate a side of the
slot or slots.
[0060] The index structures, such as grooves 72, may be integrally
formed with the backboard 12, such as by being molded as part of
the backboard. Alternatively, the index structure or structures
might be separately formed and then secured to the backboard. For
example, the grooves 72 might be formed in a plate that is then
fastened to the backboard, such as with screws or other fasteners.
While the grooves 72 are shown somewhat elongated to engage in an
elongated, protruding ridge 74 of the paddles, as discussed below,
they might be shortened to essentially form indents. The protruding
ridge 74 would then be appropriately shortened to essentially form
a knob to engage the indent and secure the transverse or lateral
spacing of the paddles 22a, 22b.
[0061] To lock the paddles into position with respect to each other
and to prevent them from being spread apart when the head and neck
of the patient has been immobilized, a portion of the paddle
engages the respective index structure. Specifically, in an
embodiment illustrated in FIGS. 1 and 1A-1C, a protruding ridge 74
engages a respective groove 72 of the index structure 70. Referring
to FIGS. 1A and 1B, when the paddle is moved from the storage
position and is positioned generally in the range of 20 degrees to
70 degrees above the plane of the backboard, the spanning portion
60 and the ridge 74 of the paddle are not forced to engage the
backboard and the grooves 72, respectively. That is, they are
double open-ended grooves. In that way, the paddle slides freely in
the direction of arrow 62 (see FIG. 1A) to the proper position,
such as close to the neck and head of a patient lying on the
backboard. At the proper position the paddle can be moved or
rotated completely upwardly to the support position, which, for
example, may be generally perpendicular to the plane of the
backboard. At that time, the spanning structure 60 is forced into
engagement with the backboard such as the back side 16 of the
backboard, and the ridge 74 meets and slides into a particular
groove 72 to lock the paddle at an index point on the index
structure. As illustrated in the cross-section of FIG. 1B, the
ridge 74 seats within the respective grove 72 when the paddle is in
the support position. The engagement of the index structure by the
paddle in that way laterally locks the position of the paddle so
that it cannot be moved apart from the opposing paddle. With both
the paddles in the support position and locked in such a way, the
width or spacing between the opposing paddles for accommodating the
head and neck of the patient is fixed. The present invention may
accommodate a wide variety of head widths, ranging from pediatric
to adult, even up to a patient with a helmet, such as a motorcycle
helmet, on their head.
[0062] As illustrated in FIG. 1, the ridge 74 is dimensioned to
generally span the length of the grooves of index structure 70 to
provide proper securement of the paddles in the proper position.
The spacing between the various index grooves 72 and the length of
the grooves and the ridge 74 may be varied depending on the desired
spacing of the indexing points and the robustness of the paddles
and their securement. When the paddles are moved to the vertical or
support position with respect to the backboard, the protruding
ridges 74 are preferably configured to fit somewhat snugly into the
grooves 72. This allows the paddles to freely stand up in a support
position while simultaneously locking the transverse position of
the paddles on the backboard. The straps 40 can then be applied to
span the head and neck of the patient and between the opposing
paddles as illustrated in FIG. 2.
[0063] In accordance with another aspect of the present invention,
it is desirable that a backboard, particularly the head and neck
restraining portion of such a backboard, be readily and easily
cleanable. Prior art backboard and prior art head/neck
immobilization structures have provided a plurality of cavities and
recesses in which blood or other bodily fluids might collect when
in use. To then clean and sanitize the structures for the next use,
medical personnel must painstakingly scrub the structures and get
into the various cavities to reduce the risk of transmission of
fluid and blood-borne pathogens and contamination of a subsequent
patient. In the present invention, the grooves 74 are open at their
ends and open into the respective slots 45, as illustrated in FIGS.
1, 2, and 7. In that way, the grooves can be wiped clean without
any corners or walls for catching fluids. That is, the contents of
the grooves can be wiped into the slots 56 which are open and
therefore subject to easy cleaning. Alternatively, a fluid such as
water or a disinfectant can be sprayed down into the grooves and
will easily flow out the open ends and into the slots 56, and
thereby off the backboard.
[0064] To secure the paddles together in a support position to
support a patient's head and neck, straps 40 may be utilized to
span between the paddles and over a patient's head and neck, as
illustrated in FIG. 2. Referring to FIG. 6, such straps may be made
of tape 40a that span across the top edges of the paddle and are
secured to the edges of the backboard in the typical securement
methodology. However, by spanning tape across the top edges 80 of
the paddle, the height of the securing straps or tape 40 is set by
the height of the paddles. This may not provide desirable
securement of the patient's head and neck, particularly for smaller
patients such as infants and toddlers whose heads will be
significantly below the height of the edges. In accordance with
another aspect of the present invention, the strap 40 is adjustable
in height on the paddle to adjust to different head height.
Referring to FIGS. 1 and 2, openings 82 are formed in the paddles
to receive the straps 40 at different heights on the paddle. Two
such vertically spaced openings 82 are shown in the embodiment of
the Figures. However a greater number of openings may be utilized
for adjustment purposes. In that way, rather than spanning over the
top edges 80 of the paddles, the straps 40 extend through the
paddles and thereacross to span across the patient's head as
illustrated in FIG. 2. The corresponding openings 82 are formed in
each paddle for each strap utilized. In the illustrated embodiment,
two straps are utilized, one at the forward end of the paddle
(closest to the patient's forehead) and one at the rearward end of
the paddle (closest to the patient's chin). The ends of the straps
may be coupled to the backboard in any suitable fashion.
[0065] In the disclosed embodiments, a single strap is secured to
each paddle and is secured with that paddle. The strap then spans
across to the other paddle and is secured into position with an
appropriate fastening technique. Referring to FIGS. 1 and 2, an end
of the strap 40 is shown secured at a leg portion. Specifically,
referring to FIG. 1C, the leg portions 50 are split into separate
sections to allow the strap 40 to be secured around the spanning
portion 60 that engages the leg portion 50, such as a dowel or pin.
For example, the strap end might be slid around the dowel and be
sewn. For immobilizing the head and neck, the free end of the strap
is placed through the desired openings 82 in the paddles, over the
head and neck of the patient, and through similar openings in the
other paddles. As illustrated in FIG. 2, multiple straps, one on
the forehead, and one proximate to the chin, might be utilized. The
free end of the strap is then secured with an appropriate method,
such as with adhesives, a buckle, hook/loop fasteners, or other
securing mechanisms. In the illustrated embodiment, a cam buckle 86
is utilized to receive the free end of the strap 40.
[0066] Therefore, in accordance with one aspect of the present
invention, the strap is integral with the immobilization device 10
and is stored with the backboard along with the paddles 22a, 22b to
be readily available for use. Therefore, precious time is not
wasted in securing paddles or blocks to the board and then securing
the head between the paddles and block such as with separate tape
or strap structures. While the straps 40 are shown secured to
opposite paddles, they might be fixed to the same paddle with both
free ends extending over to the other paddle.
[0067] The present invention contemplates storage of the straps
with the paddles in the storage position. In accordance with
another aspect of the present invention, the paddles are configured
for storing the straps out of the way when the paddles are in the
storage position. In one embodiment, as illustrated in FIGS. 1, 2,
and 3, an indent 88 is formed in the back of the paddle for
receiving a folded strap. When the paddle is then folded to the
storage position, an interference fit keeps it within the paddle to
keep it out of the way to prevent it from being caught during
storage of the immobilization device 10. Alternatively, as
illustrated in FIG. 6, raised walls 90 might be utilized to capture
the strap 40 to secure it in an interference fit when the paddles
are in a storage position. Therefore, once the strap is folded and
loaded into the paddle, it is prevented from becoming loose by a
tight interference fit.
[0068] An alternative embodiment of the invention is illustrated in
FIG. 3. Layers 28 utilized with the paddles 22a, 22b may be
removable for being disposable, or disinfected and reused. For
example, they might be fastened by a suitable adhesive or hook/loop
fasteners to be readily pulled away from the paddles after each use
and discarded. Alternatively, they might slide into tracks or
otherwise engage paddles 22a, 22b to be easily removed and replaced
after each use so that the layer does not need to be cleaned.
Referring to FIG. 13, if the paddle is split, a suitably split
cushion is utilized to allow the separate sections of the paddle to
be separated as desired.
[0069] FIGS. 4 and 5 illustrate another aspect and embodiment of
the present invention, which facilitates grasping and lifting the
backboard by medical personnel, and also ensures sufficient
operation of the paddles when they are adjusted. Referring to FIG.
4, the backboard 12 includes a network of raised areas 92 along the
length of the backboard and also proximate the head end 20 of the
backboard. The raised areas elevate the hand holes 32 off the
ground to allow medical personnel to easily slide their hands
underneath the backboard to lift a patient secured thereon.
Generally, the hand holes 32 will be placed equidistant along the
border of the backboard 12 to promote balance while carrying the
patient. The raised areas might be formed by securing appropriate
ridges to the back side of the backboard. Alternatively, such
raised areas may be molded with the backboard, such as when the
backboard is made out of a suitable plastic material. In accordance
with another aspect of the invention as illustrated in FIG. 4, the
hand holes 32 might include pins that span the holes and are
configured for strapping to clips or straps such as for strapping a
patient onto the backboard.
[0070] The raised areas 92 proximate the head end 21 provide proper
clearance for movement of the leg portions 50 and spanning portion
60 of the paddles. Turning again to FIGS. 1A, 1B, clearance for the
lateral adjustment of the paddles is necessary so that the leg
portions and spanning portion are not hindered. Similarly,
interference between the paddle and a ground or support surface is
prevented so the paddles may be readily moved between storage and
support positions.
[0071] FIGS. 9 and 10 illustrate an alternative embodiment of the
invention, in which a single slot 56a is utilized rather than
multiple slots, while the index structure is in the form of a
plurality of grooves 72a, 72b positioned on either side of the slot
56a. That is, the index structures 70a, rather than spanning
between two slots, is positioned on either side of the single slot
56a. FIG. 10 illustrates a paddle 22d that engages slot 56a and the
index structure 70a. The protruding ridge is divided into two
sections 74a and 74b, for engaging the respective grooves 72a and
72b in the index structure when the paddle 22d is moved to the
support position as illustrated in FIG. 10. Paddle 22d includes a
single leg portion 50a that engages the slot 56a. The spanning
portion 60a of the paddle 22d spans to either side of a leg portion
50a to secure the paddle to the backboard. In the embodiment
illustrated in FIG. 10, the spanning portion is in the form of a
pin or a dowel that extends through an appropriate opening formed
in the leg portion 50a and spans along a back side of the board
generally below the grooves 72a, 72b of the index structure. The
pin or dowel is held into position on one side by a head 100 and on
the other side by a clip 102. Alternatively, as noted above, the
spanning portion might be integrally formed with the leg portion 50
or the paddle 22d, such as by being molded with either of those
components.
[0072] FIG. 11 illustrates an alternative head end for an
immobilization device of the present invention. The paddles
utilized are similar to those illustrated in FIG. 1, although they
could be any suitable paddles, included those illustrated herein.
The head end 20 of the backboard in FIG. 11 utilizes a raised area
104 that has recessed areas therein 106 for receiving the paddles
22a, 22b in the storage position. The raised area tapers at a
rearward edge 108 down to the front side of the backboard. In that
way, the raised area 104 defines an area for supporting the head of
a patient and also demarcates a position at the rearward edge 108
for positioning the shoulders of a patient. That is, at the tapered
demarcation provided at the rearward edge 108, the medical
personnel have a reference point for sliding the patient's body
along the board for proper alignment of their head with the
paddles. Because of different physiologies among patients, the edge
108 does not provide an exact point, but rather offers a reference
point between the paddles. To receive the head, an indent portion
110 is formed to allow the head to nest between the paddles 22a,
22b. The raised portion might be formed as a separate piece
attached to the front side 14 of the boarded or it might be molded
integrally with the board. The indent portion 110 in one embodiment
includes a suitable cushion material, similar to cushion 30, as
illustrated in FIG. 1.
[0073] FIG. 12 illustrates an alternative embodiment of a paddle
22e in which the height of the paddle is raised to provide a wider
and taller ear hole 34e. Paddle 22e is configured to have an indent
area 88 therein for storing the strap 40. Furthermore, the paddle
has openings 82 for positioning of the strap along the height of
the paddle to adjust to different patient heads. To receive the
free end of the strap 40, such as from the other paddle, a buckle,
such as a cam buckle 112 or other attachment device is utilized and
is rotatable about a center axis as illustrated by arrow 114. The
other end of strap 40 is secured, such as by coupling with spanning
portion 60.
[0074] FIGS. 14-17 illustrate further alternative embodiments of
the invention, and particularly illustrate an alternative index
structure for locking the paddles at certain indexed positions on
the backboard. Rather than being positioned on the front side of
the backboard, the index structure is incorporated into slots
formed through the backboard. Specifically, with respect to FIG.
14, a paddle 22f is shown and is somewhat similar to other paddles
discussed previously, such as those shown in FIGS. 7 and 8.
Therefore, like numerals are utilized where possible for similar
components between the embodiments.
[0075] The index structure 70b includes a plurality of posts 120
that extend into slots 56b formed in the backboard. As illustrated
in FIG. 16, two sets of posts in an opposing relationship extend
into the slots 56b from a side wall 122 of the slots. The posts
provide index channels 124 there between into which corresponding
index tabs 126 slide when the paddles 22f are in the support
position (see FIG. 14). Therefore, the posts 120 provide an index
structure 70b for indexing the paddle 22f at desired positions to
provide for proper spacing between the opposing paddles to secure
and immobilize the head and neck of a patient. Similar to the
paddles discussed above, the paddle may be freely movable when
raised to a position between the storage position and the support
position and will slide transversely with respect to the slots 56b
to vary the space between the opposing paddles. When the paddles
are moved to a generally perpendicular support position and the
spanning portion 60 of the paddle engages the backboard, the index
tabs 126 engage the index posts 120 in the slots 156b. More
particularly, the index tabs 126 slide into the channels 124
created between the index posts. The embodiments illustrated in
FIGS. 14-17 further enhance the cleanability of the immobilization
device of the invention by eliminating any cavity that catches
fluid. Any fluid proximate to slots 56b and the paddles 22f and
specifically fluid contacting the index structures 70b will be able
to pass over the slots and various posts 120 that form the open
channels 124. In that way, water or other fluid may be directed
down through the channels 124 and around the posts to keep them
clean of blood or other bodily fluids.
[0076] FIG. 17 illustrates another alternative embodiment of the
invention and shows a cross-sectional view of a backboard and
paddle shaped for more closely conforming to the head of a patient.
Specifically, paddle 130 is not generally similar to other paddles
discussed herein above. Rather, the paddle has a concave shape
toward the head and neck of a patient to provide better conformity
around the head of the patient. The top 132 of the paddle 130 has a
concave shape that will more closely conform to the side of the
head of a patient. Paddle 130 may be made of a pliable material
such as a plastic or hard rubber material that will allow it to
more closely conform to a patient's head when in the support
position. Straps, tape or other securing structures spanning
between the opposing paddles 130 will secure the paddles in the
support position and will more closely conform the paddles to the
patient's head and neck. In one embodiment, the entire paddle may
be formed of pliable material. Alternatively, the paddle might
include a pliable tip section 134 that will provide conformity
generally where the paddle engages curved portions on the side of a
patient's head or neck. In another aspect of the invention, as
shown in FIG. 17, the side of the backboard, proximate the head end
20 where the paddles are located, is formed to hold the conformable
paddles 130 in the storage position. As illustrated in FIG. 17, the
backboard 12a includes a side section 136 with an overhang 138 that
captures the top portion 134 of the paddle. The compliant paddle
may then be pulled from a storage position and out from the
overhang 138 to be moved to the support position as illustrated in
FIG. 17. Paddle 130 includes one or more leg portions 50b, which
extends through slots 56c formed in the backboard. A spanning
portion 60a secures the paddle 130 with the backboard and provides
a stop mechanism for the paddle in the support position to prevent
over-rotation, as discussed above. In the embodiment of FIG. 17, an
index structure 70c includes a plurality of posts 120a at index
positions along the width of the board. Index tabs 126a on the
paddles 130 engage channels 120a formed between the index posts
120a to laterally or transversely secure the paddle in a specific
indexed position corresponding to a particular width of the head
and neck of a patient. The embodiment of FIG. 17 also provides the
benefit of open channels 124a that do not collect bodily fluids and
associated blood/fluid-borne pathogens. The paddles 130 may be
secured around the head and neck of a patient such as with straps,
tapes, or other securement structures. Furthermore, the paddles 130
may have other features such as ear holes and strap storage
components similar to those in the embodiments discussed above.
[0077] In an alternative embodiment of the invention, as
illustrated in FIGS. 18 and 19, a specific index structure with
discrete index positions, is not utilized to hold the paddle in
position when it is moved to the support position. Rather, a
friction fit between elements of the paddle and the backboard
provides the fixation of the paddle in a specific position. More
specifically, the spanning portion and paddle body rest against
respective back side and front side surfaces to secure the paddle
in place in the support position. Referring to FIG. 18, paddle 140
has a paddle body 142 that moves between a support position and a
storage position, as discussed above. One or more leg portions 144
depend from the paddle body and extend through respective slots 146
formed in the backboard. A spanning portion 60, such as a dowel,
spans from the leg portion or spans between and is secured by the
leg portions 144. In one embodiment, the spanning portion and
paddle may be configured to pinch the backboard there between when
the paddle is moved to the support position. That is, no index
structure is utilized and the friction provided at the front and
back sides of the backboard will hold the paddle in place.
Alternatively, cam structures might be used as illustrated in FIGS.
18, 19. Positioned on the spanning portion 60 are one or more cams
148, which are configured to engage a back side 16 or a portion of
the backboard to lock the paddle when it is in the support
position, as illustrated in FIGS. 18 and 19. In the embodiment
illustrated in the Figures, two cams 148 are utilized, one
associated with each of the leg portions 144 extending through the
backboard. Referring to FIG. 18, when the paddle 142 is moved to
the support position, the cam 148 includes a flat surface 150,
which engages a back side surface 16a of a portion of the
backboard. Simultaneously, a portion of the paddle 152 engages a
front side section 12a of the backboard. The cam 148 rolls about
its pivot axis, which is generally co-axial with the dowel 60 to
pinch itself and the paddle against respective surfaces of the
backboard. For example, the surface 150 of cam 148 is directed
against surface 16a, while the paddle is directed against surface
12a. The pinching provides a frictional engagement or interference
with the backboard, such that the paddle is locked into the support
position, as desired for supporting the head and neck of a patient.
One advantage of the embodiment illustrated in FIGS. 18 and 19 is
that discrete index positions are not utilized. Rather, the paddles
may be adjusted to a seemingly infinite number of different head
widths along the continuous respective backboard surfaces 12a, 16a.
The cam 148 provides a wedging or pinching action in the support
position; however, when the paddle is moved from the support
position toward the storage position, the cam is free to pivot such
that the flat surface 150 disengages from surface 16a to allow
lateral movement of the paddle to a desired position.
[0078] FIG. 20 illustrates another embodiment of the present
invention wherein the index structure 70 is utilized on the back
side 16 of the board. Referring to FIG. 20, similar reference
numerals are utilized to note similar elements. The index structure
70a utilizes grooves 72a at various index points along the index
structure. The spanning portion 60, such as a dowel, and the
grooves 72a are configured such that the dowel can engage the
grooves when the dowel is moved to the support position, as
illustrated in FIG. 20. A bottom surface of the paddle 74a engages
surface 16 of the backboard, and the paddle is thereby locked into
position.
[0079] While the present invention has been illustrated by a
description of various embodiments and while these embodiments have
been described in considerable detail, it is not the intention of
the applicant to restrict or in any way limit the scope of the
appended claims to such detail. For example, various features are
shown for the different embodiments, but those features do not have
to all be used on a single device. Different combinations of
features and components might be used on various different
embodiments of the immobilization device. Additional advantages and
modifications will readily appear to those skilled in the art. The
invention in its broader aspects is therefore not limited to the
specific details, representative apparatus and method, and
illustrative example shown and described. Accordingly, departures
may be made from such details without departing from the spirit or
scope of applicant's general inventive concept.
* * * * *