U.S. patent number 3,903,878 [Application Number 05/520,372] was granted by the patent office on 1975-09-09 for device for supporting a limb and associated extremity.
Invention is credited to Donald C. Spann.
United States Patent |
3,903,878 |
Spann |
September 9, 1975 |
Device for supporting a limb and associated extremity
Abstract
A device for supporting a limb and its associated extremity,
such as a hand or foot, is formed from a block of resilient,
air-permeable polyurethane foam having a polygonal cross-section
and being of such configuration as to include; an internal groove
extending along the entire length of the block providing a cradle
for the limb, a slot extending radially from the groove through an
outer wall surface for receiving the limb therethrough, and a
pressure sensitive fastening means carried by the block and by an
elongated strip member, which engages the underside portion of the
associated extremity, for connecting the block and the strip member
so as to hold the lower portion of the limb and the extremity
together as a unit.
Inventors: |
Spann; Donald C. (Greenville,
SC) |
Family
ID: |
24072318 |
Appl.
No.: |
05/520,372 |
Filed: |
November 4, 1974 |
Current U.S.
Class: |
602/21; 5/650;
5/922; 128/892; 5/647; 5/651; 128/DIG.15 |
Current CPC
Class: |
A63B
23/16 (20130101); A61F 13/069 (20130101); A61F
13/10 (20130101); Y10S 5/922 (20130101); Y10S
128/15 (20130101) |
Current International
Class: |
A61F
13/06 (20060101); A61F 13/10 (20060101); A63B
23/035 (20060101); A63B 23/16 (20060101); A61F
005/10 () |
Field of
Search: |
;128/77,80,87,89,83,84,133,DIG.15,149,134 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Attorney, Agent or Firm: Bailey & Dority
Claims
What is claimed is:
1. A device for supporting a lower portion of a limb and an
associated extremity avoiding the sagging of related muscles as
often results from inactivity due to prolonged bed rest and the
like, comprising:
a. a supporting block member constructed from resilient deformable
polyurethane foam material;
b. a continuous internal groove portion extending longitudinally
through the entire length of said block providing a cradle for a
lower portion of a limb;
c. said block member having a thickened base portion for supporting
the lower portion of a limb and the associated extremity above a
surface of a bed;
d. said block member including a slot extending radially from said
groove portion through an outer wall surface providing an opening
in said block for receiving the lower portion of a limb
therethrough;
e. first pressure sensitive fastening means carried by said member
on said outer wall surface adjacent opposite sides of said slot for
gripping the lower portion of a limb therein;
f. an elongated strip member constructed from resilient
polyurethane foam material for engaging the underside of the
associated extremity of a limb; and
g. second pressure sensitive fastening means carried by said strip
member cooperating with said first pressure sensitive fastening
means for attaching said strip member together with said block
member as a unit;
whereby a lower portion of a limb is supported together with its
associated extremity depending upon the adjustable positioning of
the fastening means to securely position and support the lower
portion of a limb and its associated extremity as a unit.
2. The structure of claim 1 wherein said supporting block member is
substantially of polygonal cross-section having a plurality of
planar outer surfaces providing a plurality of selectable base
surfaces.
3. The structure of claim 1 wherein said elongated strip member
includes a cylindrical body portion engaging the underside of the
associated extremity for effectively distributing pressure over a
substantial area of the extremity.
4. The structure of claim 3 wherein said cylindrical body portion
carries complementary pressure sensitive fastening means for
fastening said cylindrical body to said second pressure sensitive
fastening means.
5. The structure of claim 1 wherein said strip member includes a
rectangular strip having a sufficient width to engage and span the
underside of the associated extremity effectively distributing
pressure over a substantial area of the extremity.
6. The structure of claim 1 wherein said strip member includes a
semi-cylindrical body portion carried by a rectangular strip of
sufficient width to engage and span the underside of associated
extremity, said rectangular strip carrying said second pressure
sensitive fastening means adjacent each end thereof.
Description
BACKGROUND OF THE INVENTION
Medical personnel have become increasingly aware that proper
positioning and support of a bed patient's limb and its associated
extremity as a unit can be an important factor in the patient's
condition when released from bed confinement and in the time
required for recovery. In so doing, it is also important that the
limb and associated extremity, while supported as a unit, are
capable of being exercised and flexed a certain amount, and that
the supported skin area can be easily observable to note skin
chaffing and rawness.
Prior devices have been developed for resiliently encircling the
lower portion of a limb of a bed patient for restraining movement
thereof, such as in U.S. Letters Pat. No. 3,535,718 and 3,027,395.
Other devices such as shown in U.S. Letters Pat. No. 3,345,656
include supporting blocks for maintaining a lower limb above a bed
surface to prevent the formation of bed ulcers or sores on the heel
which often result from prolonged periods of bed rest. However,
these devices, while restraining limb members and supporting limb
members, do not support the extremities of the limb which are
allowed to drop or be held loosely therein.
Often as a result of permitting the extremity of a limb to drop
loosely from a supporting device, the muscles and ligaments stretch
at the top of the limb and contract at the bottom of the limb. When
this is permitted for prolonged periods of time, as is often the
case of bed-ridden patients, the muscles and ligaments become loose
and out of shape requiring much physical reconditioning of the
patient's limb when released from bed confinement.
Accordingly, an important object of the present invention is to
provide a device for supporting a lower portion of a limb and an
assocated extremity together as a unit.
Another important object of the present invention is to provide a
device for supporting a limb and an associated extremity in such a
manner as to prevent the stretching and contracting of muscles and
ligaments which often results when the associated extremity is
allowed to drop loosely from the supporting device.
Another important object of the present invention is to provide a
device for supporting a limb and an associated extremity together
as a unit while permitting the exercise of the extremity held
therein.
Another important object of the present invention is to provide a
device for supporting a limb and an associated extremity wherein
the skin of the supported limb may be conveniently observed.
SUMMARY OF THE INVENTION
It has been found that a device for supporting a lower portion of a
limb and an associated extremity, such as a foot or hand, can be
constructed of a resilient polyurethane foam block having a
substantially polygonal cross-section, a continuous internal groove
extending longitudinally through the length of the block providing
a cradle for the lower portion of the limb, and a slot extending
radially from the groove through an outer wall surface of the block
for receiving the lower portion of the limb therethrough. A
pressure sensitive fastening means is carried on the outer wall
surface of the block member adjacent opposite sides of the slot for
closing the slot and gripping the lower portion of the limb
therein. An elongated strip member constructed from resilient
polyurethane foam is provided for engaging the underside of the
associated extremity of the limb and carries pressure sensitive
fastening means which cooperate with the pressure sensitive
fastening means carried by the block member to fasten the strip
member and the block member together. Thus, the lower portion of
the limb is supported together with its associated extremity as a
unit depending upon the adjustable positioning of the fastening
means.
BRIEF DESCRIPTION OF THE DRAWINGS
The construction designed to carry out the invention will be
hereinafter described, together with other features thereof.
The invention will be more readily understood from a reading of the
following application and by reference to the following
specification and by reference to the accompanying drawings forming
a part thereof, and wherein an example of the invention is shown
and wherein:
FIG. 1 is a perspective view illustrating a device for supporting
the lower arm and hand of a patient together as a unit constructed
in accordance with the present invention,
FIG. 2 is a perspective view illustrating a polygonal block member
constructed in accordance with the present invention for receiving
and cradling the lower portion of a limb,
FIG. 3 is a perspective view illustrating a strip member
constructed in accordance with the present invention which fastens
with the block member of FIG. 2 to support the associated extremity
of the limb held therein,
FIG. 4 is a perspective view illustrating a modified form of the
strip member shown in FIG. 3 constructed in accordance with the
Present invention,
FIG. 5 is a perspective view illustrating a support block member
constructed in accordance with the present invention for supporting
a limb as a a lower leg portion,
FIG. 6 is a perspective view illustrating a strip member
constructed in accordance with the present invention for engaging
the underside of an associated extremity to be fastened to the
support block member of FIG. 5, and
FIG. 7 is a perspective view illustrating the support block member
and strip member of FIGS. 5 and 6 as used to support a lower leg
portion and foot in accordance with the present invention.
DESCRIPTION OF A PREFERRED EMBODIMENT
The drawings illustrate a device for supporting a lower portion of
a limb and an associated extremity to avoid the sagging of related
muscles as often results from inactivity due to prolonged bed rest
and the like. A device constructed in accordance with the present
invention is illustrated in FIG. 1 wherein a supporting block
member, designated generally at 10, is provided for receiving and
cradling a forearm portion of a limb with the associated hand being
properly supported by a resilient strip member A and fastened to
the block member 10 as a unit by using conventional Velcro
fastening strips.
The support block member 10 is preferably cut or sawed from a
one-piece block of resilient polyurethane foam material which is
lightweight and permits the flow of air therethrough. The block has
the advantage of being inexpensive and suitable for one-patient use
so that it does not have to be reused. As best seen in FIG. 2, the
block is formed to include a plurality of flat side surfaces 11 and
a internal groove portion B of substantially semi-circular
cross-section extending through the entire length of the block
providing a cradle for the lower portion of a patient's limb. One
of the flat sides surfaces 11 may be selected as a base surface
when the block is used on the surface of a bed, and the thickened
portion 12 of the support block 10 between the bottom of the groove
B and the base surface provides for supporting the patient's limb
above the bed surface in a stable manner. A slot C extends radially
from the groove portion B through an outer wall surface of the
support block providing an opening through which the lower portion
of the limb may be received. Pressure sensitive fastening means are
provided by a plurality of Velcro hook coupling strips 13 carried
on outer wall surfaces 11a and 11b of the support block adjacent
opposite sides of the slot C which operate with pile coupling
members 13a for closing the slot and gripping the limb held
therein. The hook strips 13 may be attached to the block member in
any suitable manner, such as by using a polyurethane resin or epoxy
cement.
For purposes of illustration, in one particular embodiment, the
block 10 was constructed to be 4.5 inches in length and 6 inches in
diameter with groove C approximately 2.5 inches in diameter.
Referring to FIG. 3, an elongated strip member A is shown as being
formed of polyurethan foam and having a cylindrical cross-section.
On each end 14 and 15 of the cylinder strip is located a Velcro
hook coupling strip 16. A Velcro pile coupling member 17 cooperates
with the hook coupling strips 16 to provide a pressure sensitive
fastening means for connecting the strip member as a unit with the
supporting block 10. The cylindrical strip member A engages the
underside portion of the patient's hand and adjustably positions
the hand as held with the forearm by the support block 10 as a
unit. The position of the hand may be adjusted to provide for
comfort and therapy for the forearm and the hand as desired. A
modified form of the strip member is shown in FIG. 4 as including
an elongated rectangular strip of resilient polyurethane foam 18 on
which is mounted a semi-cylindrical body member 19 for engaging the
underside portion of the patient's hand. The body member 19 may be
formed as by cutting strip 18 and body member 19 out of a one piece
stock of material or body member 19 may be made integral with strip
18 as by gluing. The strip and body member are of sufficient width
so as to effectively distribute pressure over a large area of the
underside portion of the hand so as to prevent poor blood
circulation in any particular cell. In one particular embodiment
the strip is approximately 24 inches in length and 5 1/2 inches
wide, and the body member 19 is approximately 5 inches in length
with a radius of 1 3/4 inches. Adjacent each end of the strip
member 18 is a plurality of Velcro pile coupling members 20 for
attaching the strip member to the hook coupling on support block
10.
The device thus described is effective for supporting a patient's
forearm and hand together as a unit. The wrist is cocked slightly
so that the muscles on top of the forearm will contract and become
shorter and will stretch slightly on the underside making a
patient's physical therapy much more progressive than would be
otherwise. A limb in a fresh cast may be supported with the device
with the drying of the cast enhanced by the air flow through the
foam material. The support block 10, being open at the top,
provides convenient observation of the patient's skin in the
supported area. The use of a wide strip member A effectively
distributes the pressure over a large area of the underside of the
hand so that blood circulation is not cut off in any particular
cell. In one particular embodiment, the cylindrical body A is
approximatly 5 inches long and 2 1/2 inches in diameter. The strip
member also permits exercise of the hand as by squeezing the
cylindrical member A, as well as flexing of the wrist.
Referring now to FIGS. 5 through 7, a somewhat modified form of the
invention is illustrated wherein a support block member designated
generally at 30, supports and cradles a lower portion of a leg 31.
The associated foot is positioned and supported by a strip member
E, and a fastening means F is provided for tightening the support
block member about the lower portion of the leg. The support block
member 30 includes a plurality of flat outer surfaces 32 and a
continuous internal groove portion G extending through the entire
length of the block member providing a cradle for the lower portion
of the leg. One of the flat outer surfaces 32 may be selected to
provide a base for the support block above which the lower limb
portion rests on a thickened portion for maintaining the limb above
a bed surface. A slot portion H extends radially from the groove
portion through an outer wall surface providing an opening for
receiving the lower leg portion therethrough. A plurality of Velcro
hook coupling strips 33 are carried on the outer wall surfaces 32a
and 32b of the block member adjacent the opposite sides of the slot
providing a pressure sensitive fastening means thereon.
For purposes of illustration, in one particular embodiment the
block member 30 was constructed to be 7 inches in length, 8.5
inches in diameter, and groove G being approximately 3.25 inches in
diameter.
The elongated strip member E is provided for engaging the underside
portion of the foot and for supporting the foot together with the
block member 30 as a unit. Adjacent each end of the strip member E
are a plurality of pile coupling strips 34 which cooperate with the
hook coupling strips 33 carried by the block member to provide a
pressure sensitive fastening means. A conventional fastening belt
member F, such as a strip and buckle arrangement, may be used to
close the slot H and tighten the block member 30 about the lower
portion of the leg 31 to firmly grip the leg therein, or additional
Velcro hook strips may be used. The strap member F may also be used
to encircle both the block member 30 and the strip member E to give
additional fastening support to the block member and strip member
as a unit. As thus described, the device of the present invention
provides support and positioning of a lower portion of a leg,
together with its associated extremity or foot depending upon the
adjustable positioning of the fastening means to secure and support
the limb and its associated extremity together as a unit.
The foot is effectively prevented from dropping at the end of the
support block, thus avoiding sagging of the related muscles and
ligaments. The foot is permitted a certain amount of exercise and
flexing against the flexible strip member. Easy access is provided
to the supported area of the skin when using block 30 through the
slot opening.
While a preferred embodiment of the invention has been described
using specific terms and approximate dimensions, such description
is for illustrative purposes only, and it is to be understood that
changes and variations may be made in the various dimensions and
shapes without departing from the spirit or scope of the following
claims.
* * * * *