U.S. patent number 3,602,227 [Application Number 04/843,020] was granted by the patent office on 1971-08-31 for endotracheal tube clamp.
Invention is credited to Daniel E. Andrew.
United States Patent |
3,602,227 |
Andrew |
August 31, 1971 |
ENDOTRACHEAL TUBE CLAMP
Abstract
A disposable clamp for holding an endotracheal tube or the like
during use comprises a pair of superimposed waferlike clamping
members formed with complementary cutaway portions to define an
aperture for receiving the tube. The members provide respective
pairs of parallel upstanding walls of sawtooth profile which engage
one another to prevent separation of the clamping members. The
members are retained in superimposed relation by means of
interfitting dovetail or equivalent formations. When assembled, the
clamping members can be separated only by breaking one of the
clamping members, for which purpose a line of easy fracture is
provided.
Inventors: |
Andrew; Daniel E. (Waterloo,
Ontario, CA) |
Family
ID: |
25288851 |
Appl.
No.: |
04/843,020 |
Filed: |
July 18, 1969 |
Current U.S.
Class: |
128/207.17;
248/49 |
Current CPC
Class: |
A61M
25/02 (20130101); A61M 2025/024 (20130101); A61M
16/0488 (20130101) |
Current International
Class: |
A61M
25/02 (20060101); A61M 16/04 (20060101); A61m
025/02 (); F61l 003/10 () |
Field of
Search: |
;128/351,346,12
;132/36.1,36.1A,33F ;248/49 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pace; Channing L.
Claims
What I claim as my invention is:
1. A disposable clamp for holding an endotracheal tube, comprising
a pair of U-shaped clamping members each having a yoke portion and
a pair of longitudinally extending parallel limb portions, and
means associated with portions of said clamping members securing an
attachment band to the clamping members, the clamping members being
superimposed to define between the yoke portions and limb portions
thereof an aperture for receiving the endotracheal tube, each
clamping member defining a pair of longitudinally extending wall
portions engaging the pair of longitudinally extending wall
portions of the other clamping member, for retaining the members in
superimposed relationship, each clamping member defining at least
one longitudinally extending wall portion of sawtooth profile
positioned to lockingly engage the corresponding sawtooth profiled
wall portion of the other clamping member for preventing release of
the clamping members, and one of the clamping members being formed
with a line of weakness to permit said one member to be broken
readily in order to separate the clamping members.
2. A disposable clamp for holding an endotracheal tube
comprising
a. a first U-shaped clamping member having a yoke portion, a pair
of parallel longitudinally extending limb portions, and a
projection integral with said yoke portion, the projection defining
a first pair of longitudinally extending parallel walls of sawtooth
profile,
b. a second U-shaped clamping member having a yoke portion and a
pair of parallel longitudinally extending limb portions, the limb
portions providing a second pair of longitudinally extending
parallel walls of sawtooth profile lockingly engaged with said
sawtooth profiled portions of said first pair of walls,
c. means associated with portions of said first and second clamping
members for securing an attachment band define the clamping
members,
d. the clamping members being superimposed to define between the
yoke portions and limb portions thereof an aperture for receiving
the endotracheal tube, said pairs of parallel walls mutually
engaging one another to prevent release of the clamping
members,
e. said clamping members being of interfitting dovetail formation
for retaining the clamping members in superimposed relationship,
and
f. one of the clamping members having a line of weakness to permit
said one member to be broken readily in order to separate the
clamping members.
3. A disposable clamp for holding an endotracheal tube,
comprising
a. a first U-shaped clamping member having a yoke portion, a pair
of longitudinally extending limb portions, a flat upper surface,
and a projection from said flat upper surface, the projection
defining a first pair of parallel longitudinally extending walls of
sawtooth profile,
b. a second U-shaped clamping member having a yoke portion, a pair
of longitudinally extending limb portions, a flat lower surface,
and a projection from said flat lower surface, the limb portions
defining a second pair of longitudinally extending walls of
sawtooth profile lockingly engaged with said sawtooth profiled
portions of said first pair of walls, and the projection defining a
pair of longitudinally extending retaining edges engageable with
the limb portions of the first clamping member,
c. means associated with portions of said first and second clamping
members securing an attachment band to the clamping members,
d. the clamping members being assembled with the flat surfaces
thereof superimposed to define between the yoke portions and limb
portions an aperture for receiving the endotracheal tube, said
clamping members being retained in assembled relation by the mutual
engagement of said pairs of longitudinally extending wall portions
and by engagement of said retaining edges with the limb portions of
the first clamping member,
e. one of the clamping members having a line of weakness to permit
said one member to be broken readily in order to separate the
clamping members.
4. A disposable clamp according to claim 3, wherein the means
securing the attachment band to the clamping members is an integral
tab formed on a limb member of each clamping member.
5. A disposable clamp according to claim 3, wherein the clamping
members are of moulded plastics material.
Description
This invention relates to a disposable clamp for holding an
endotracheal tube in a set position during use. When an
endotracheal tube is applied to a patient, it is most important
that the tube be positioned accurately and maintained in the set
position for the duration of use. In general it is necessary to
clamp the tube in position by means which engage the tube and
encircle the patient's head.
It is an object of the present invention to provide such a clamping
device which is simple to apply and safe during use.
SUMMARY OF THE INVENTION
An endotracheal tube clamp according to the present invention
comprises a pair of cooperating clamping members which securely
clamp the tube between them, the clamping members being constructed
so as to engage one another in a manner which prevents their
release. One of the clamping members is formed with a line of
weakness to permit the member to be broken when it becomes
necessary to release the clamp. In this way accidental separation
of the members is prevented.
Essentially, the clamp comprises a pair of U-shaped clamping
members each having a yoke portion and a pair of longitudinally
extending parallel limb portions, and means for securing an
attachment band to the clamping members, the clamping members being
superimposable to define between the yoke portions and limb
portions thereof an aperture for receiving the endotracheal tube,
each clamping member defining a pair of longitudinally extending
wall portions positioned to engage the pair of longitudinally
extending wall portions of the other clamping member, for retaining
the members in superimposed relationship, each clamping member
defining at least one longitudinally extending wall portion of
sawtooth profile positioned to engage the corresponding wall
portion of the other clamping member for preventing release of the
clamping members, and one of the clamping members being formed with
a line of weakness to permit said one member to be broken readily
in order to separate the clamping members.
BRIEF DESCRIPTION OF THE DRAWINGS
Two embodiments of the invention are illustrated by way of example
in the accompanying drawings. In the drawings:
FIG. 1 is a general perspective view of the first clamping device,
the clamping members being separated and positioned ready to engage
an endotracheal tube;
FIG. 2 illustrates the clamping device firmly engaging the
endotracheal tube;
FIG. 3 is a rear elevational view of the assembly shown in FIG.
2;
FIG. 4 illustrates the method of separating the clamping members,
and
FIG. 5 is a view similar to FIG. 1 of the second clamping device,
partly broken away.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A disposable clamping device for securely holding an endotracheal
tube 1 comprises a first U-shaped clamping member 2 and a second
U-shaped clamping member 3, each clamping member being a one-piece
moulding of plastics material. The member 2 consists of a yoke
portion 4, a pair of longitudinally extending parallel limb
portions 5, 6, a projection 7 integral with the upper surface 8 of
the yoke portion 4, and a projecting tab 9 at one edge for securing
one end of an attachment band 10. The attachment band 10 is a tape
or the like adapted to be passed around the back of the patient's
head in the manner known in the art.
The second clamping member 3 consists of a yoke portion 11, a pair
of longitudinally extending parallel limb portions 12, 13, and a
projection 14 of dovetail cross section integral with the lower
surface of the yoke portion 11. A projection tab 30 is provided for
securing the attachment band 10. A pair of longitudinally extending
channels 15, 16 on the upper and lower surfaces of the yoke portion
11 define a line of weakness which permits the clamping member to
be readily broken.
The two clamping members are adapted to be superimposed, as shown
in FIG. 2, so as to define between the yoke portions and limb
portions thereof an aperture 17 for receiving the endotracheal tube
1, the members being longitudinally slidable one over the other so
as to shorten the aperture and firmly grip the tube 1. Separation
of the clamping members is prevented by means of an interfitting
dovetail formation provided by the dovetail projection 14 and a
pair of longitudinally extending walls 18, 19 of complementary
dovetail form at the inner edges of the limb portions 5 and 6.
The projection 7 defines a pair of longitudinally extending walls
20, 21 of sawtooth profile, which are positioned to engage a
correspondingly profiled pair of walls 22, 23 defined by the inner
edges of the limb portions 12, 13 of the second clamping member. To
assemble the clamping members the walls 18, 19 are engaged with the
dovetail projection 14, the latter defining a pair of retaining
edges or walls for retaining the limb portions 5, 6, and the walls
20, 21 are engaged with the walls 22, 23. The sawtooth profiles of
the latter are arranged so that the teeth can slide over one
another, by virtue of the resilience of the limb portions 12, 13,
as the clamping members are closed together, but so that the
clamping members cannot be moved apart.
It will therefore be seen that the clamp illustrated in FIGS. 2 and
3 cannot be unfastened except by breaking the clamping member 3
along its line of weakness as illustrated in FIG. 4.
It is apparent that numerous modifications may be made to the
illustrated embodiment without departing from the spirit of the
invention.
In one such modification, the two clamping members are
substantially similar, the projections 7 and 14 both being of
dovetail cross section and defining sidewalls of sawtooth profile,
these walls being engageable with walls of corresponding dovetail
formation and sawtooth profile defined by the inner edges of the
limb portions.
In another modification, the projection 14 instead of being of
dovetail cross section is formed with a flange lying parallel to
the lower surface of clamping member 3 and adapted to engage the
lower surface of clamping member 2.
In yet another modification, the projection 14 on clamping member 3
is omitted, and the mutually engageable pairs of walls 20, 21 and
22, 23 are shaped to provide the necessary dovetail formation or
equivalent.
Referring again to FIG. 1, it will be apparent that there is no
necessity for both walls of each pair 20, 21 and 22, 23 to be of
sawtooth profile; it is sufficient that the walls of at least one
mutually engageable pair be of sawtooth profile for the purpose
described.
Referring now to FIG. 5, the second clamping device is basically
similar to the first clamping device described above, and
corresponding parts thereof are denoted by the same reference
numerals as are used in FIG. 1, but are primed.
The clamping device comprises a first U-shaped clamping member 2'
and a second U-shaped clamping member 3', each clamping member
being a one-piece moulding of plastics material. The member 2'
consists of a yoke portion 4', a pair of longitudinally extending
parallel limb portions 5', 6', a projection 7' integral with the
upper surface 8' of the yoke portion 4', and a projecting tab 9'
for securing one end of an attachment band 10'.
The second clamping member 3' consists of a yoke portion 11', a
pair of longitudinally extending parallel limb portions 12', 13', a
projection 14' integral with the lower surface of the yoke portion
11', and a projecting tab 30' for securing the other end of the
attachment band 10'. The two clamping members fit together to
provide a circular aperture wherein the endotracheal tube 1' is
received and gripped.
In the present example, a transverse line of weakness is formed
across the first clamping member, the line of weakness intersecting
the aperture 17' for receiving the tube 1'. The projection 7' is of
dovetail cross section and engages a pair of longitudinally
extending walls of complementary dovetail form at the inner edges
of the limb portions of the second clamping member. The projection
14', however, is not dovetailed, and defines a pair of
longitudinally extending walls of sawtooth profile, which are
positioned to engage a correspondingly profiled pair of walls
defined by the inner edges of the limb portions of the first
clamping member.
* * * * *