U.S. patent number 3,574,306 [Application Number 04/790,703] was granted by the patent office on 1971-04-13 for needle protector.
This patent grant is currently assigned to Deseret Pharmaceutical Company, Inc.. Invention is credited to James David Alden.
United States Patent |
3,574,306 |
Alden |
April 13, 1971 |
NEEDLE PROTECTOR
Abstract
A needle protector defining a unitary entirely planar needle
cover including planar wings of essentially uniform thickness
molded with a reduced thickness bisecting fold line, each wing
containing a semicylindrical parallel groove for circumscribing and
binding against a needle which circumscribes an indwelling catheter
tube, the sharpened tip of the needle being confined between the
wings within the parallel grooves when the protector is folded
together and permanently fastened in the folded position by a
male-female union whereby the folded protector defines a
continuously smooth exterior. Consequently, risks of personal
injury to the patient and damage to the catheter are
alleviated.
Inventors: |
Alden; James David (Salt Lake
City, UT) |
Assignee: |
Deseret Pharmaceutical Company,
Inc. (N/A)
|
Family
ID: |
25151512 |
Appl.
No.: |
04/790,703 |
Filed: |
January 13, 1969 |
Current U.S.
Class: |
604/162; 16/225;
16/388; 16/DIG.13; 604/174; 206/365 |
Current CPC
Class: |
A61M
25/02 (20130101); A61M 2025/0246 (20130101); A61M
5/3216 (20130101); Y10S 16/13 (20130101); Y10T
16/525 (20150115); Y10T 16/559 (20150115) |
Current International
Class: |
A61M
25/02 (20060101); A61M 5/32 (20060101); A61m
005/00 () |
Field of
Search: |
;128/214,214.4,214.2,215,216,221,348 ;24/255 (SL)/ ;24/263
(RC)/ |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Truluck; Dalton L.
Claims
I claim
1. A needle protector for disabling the sharpened end of an
infusion needle which telescopically surrounds a pliable indwelling
catheter tube comprising:
a pair of essentially planar wings each of substantially uniform
thickness, each wing having a major essentially flat inside surface
and a major essentially flat outside surface, initially disposed in
an open position with the wings oppositely extending and a reduced
thickness linear fold line joining the wings one to another and
about which relative arcuate displacement of the wings precisely
occurs;
one wing comprising a centrally disposed male press fit uniting
means projecting outward from said inside surface of the wing and
defining a locking enlargement, the other wing having a
centrally-disposed female press fit uniting means opening at the
inside surface and sized and located to snugly receive the male
uniting means and defining locking structure with which a permanent
union is created with the locking enlargement after the two uniting
means have been forced together whereby a permanent retained
contiguous closed position results following relatively arcuate
displacement of the wings precisely about the fold line until the
two inside flat surfaces meet and the exterior of the closed
protector comprises essentially the two outside generally flat,
parallel surfaces free of exposed projections and together
comprising a thickness equal only to the combined thickness of the
two planar wings, and
recess-defining means disposed in at least one of the two inside
flat surfaces which meet and are adapted to receive and conceal the
sharpened end of the needle when the wings are united in the closed
position, the wings exerting an even compressive force along the
entire enclosed length of the needle so as to bind the needle
without crushing the needle against the catheter tube.
2. A needle protector as defined in claim 1 wherein the
recess-defining means comprise two semicircular grooves extending
the length of the protector, said grooves being oppositely disposed
in the inside surfaces of said wings.
Description
The present development relates to needle disabling or neutralizing
devices and more particularly to a device for preventing
undesirable movement of a hollow needle which normally surrounds an
intravenous catheter.
It is common to use hollow needles for penetrating a patient's skin
and vein to thereafter insert an intravenous catheter through the
hollow of the needle for purposes of fluid infusion and the like.
Commonly, the needle is thereafter withdrawn from the point of
venipuncture while the catheter is allowed to remain in the vein.
Normally, because of attachment of the proximal or free end of the
catheter tube to conventional infusion apparatus, it is impossible
to completely remove the needle from the catheter tube. Therefore,
in usual practice, the needle is merely taped to the arm to prevent
undesirable axial displacement of the needle along the catheter
tube exterior of the patient's arm.
It is well known that frequently the needle surmounting the
catheter tube is caused to move somewhat both laterally and axially
relative to the catheter tube; also the patient regularly moves the
arm to which the needle is taped. The relative movement of the
needle and catheter is frequently of such a nature that the
sharpened leading end of the needle cuts into the catheter tube
thereby permanently damaging the tube and making continued use of
the catheter tube undesirable. As a result, the catheter tube must
be completely withdrawn from the arm and a new venipuncture and
relocation of a new catheter tube are required.
Also, relative movement of the needle on the patient's arm
frequently allows the sharpened end of the needle to penetrate
somewhat into the flesh at one or more locations thereby severely
irritating the flesh making inflammation and infection likely.
It is a primary object of the present invention to alleviate or
substantially overcome problems of the mentioned type.
The presently preferred embodiment of the invention comprises a
novel needle protector which shields the sharpened end of the
needle from the patient's skin and which substantially obviates any
damaging relative movement of the catheter tube and needle. The
presently preferred embodiment comprises a single rigid blank
comprising two oppositely disposed halves which may be rapidly and
easily folded around and attached to the sharpened leading end of a
conventional infusion needle to provide a protection device having
a single essentially radially extending tab or handle disposed
radially to one side of the needle and attached thereto at the
sharpened leading end so that when the tab or handle is secured on
the patient's arm, such as by taping, the needle is disabled or
immobilized and prevented from penetrating either the patient's arm
or the catheter tube.
Accordingly, it is another primary object of the present invention
to provide an improved needle protector which may be rapidly and
effectively assembled and which substantially disables the
sharpened end of the needle subsequent to placement of an
intravenous catheter in a patient.
It is another important object of the present invention to provide
a novel method of disabling a needle subsequent to
venipuncture.
These and other objects and features of the present invention will
become more fully apparent from the following description and
appended claims taken in conjunction with the accompanying drawings
wherein:
FIG. 1 illustrates in top perspective one presently preferred
embodiment of the blank structure, used to form the needle
protector, in its initial postmolded state;
FIG. 2 illustrates in bottom perspective the blank structure of
FIG. 1; and
FIGS. 3 and 4 schematically illustrate preferred method steps
relied upon in uniting the blank and needle to disable the
needle.
With reference to FIG. 1, one presently preferred embodiment of the
blank structure, generally designated 20, is illustrated in its
open, postmolded state. The blank structure 20 is preferably formed
of a substantially rigid plastic material, such as polyethylene or
polypropylene, using conventional molding techniques and
structurally comprises wings or half portions 22 and 24 disposed in
essentially a single plane. Wings 22 and 24 present, as illustrated
in FIG. 1, substantially flat planar surfaces 26 and 28. The wings
22 and 24 are essentially pentagonal in shape having outwardly
extended substantially round head portions 40 and 42 and opposed
shoulders 43, 44 and 45, 46 separated respectively from the head
portions 40 and 42 by converging sides 35 and 37. The edges of the
blank structure 20 are essentially smooth and free of sharp corners
and edges to avoid irritating the skin of a patient.
The wings 22 and 24 are separated by a weakened fold line 41 which
accommodates opposite relative radial displacement or folding of
the wings 22 and 24 about a properly sized needle. Semicylindrical
grooves 50 and 52 respectively exist in the surfaces 26 and 28 and
extend along parallel axes throughout the entire axial length of
the wings 22 and 24 between the fold line 41 and the shoulders 43,
44 and 45, 46.
Between the shoulders 43, 44 and the rounded head 40, the planar
surface 26 presents an outwardly projecting disc 30 which is
integral with wing 22. The disc 30 is provided with an enlarged
peripheral flange 29 located at the outermost end thereof and a
reduced diametral portion 31, the purpose for which will be
subsequently more fully described.
The wing 24 is centrally provided with a stepped aperture 32 which
is likewise located between the shoulders 45, 46 and the rounded
head 42 of the wing 24. The aperture 32 is provided with a
diametrically reduced portion 33 which defines an annular shoulder
39 in the aperture 32. The aperture 32 snugly receives the
peripheral flange 29 and reduced portion 31 of the disc 30. Thus,
when the wings 74 and 24 are sufficiently relatively arcuately
rotated, the stepped disc 30 and the matching stepped aperture 32
engage to form a locked joint, after the peripheral flange 29 has
been forced to "snap" through the smaller diameter portion 33 of
the aperture 32.
With reference to FIGS. 3 and 4, one suitable method of disabling
the sharpened end 62 of an infusion needle generally designated 60
is illustrated and will now be described. Initially, the infusion
needle 60, having an intravenous catheter 66 disposed therein, is
inserted into a vein (not shown) in a patient's arm 70 by forcing
the needle 60 in a conventional manner through the flesh by the
handle 65. After the catheter 66 has been sufficiently located
within the vein, such as by squeezing the portion of the catheter
66 within the flexible plastic bag 68 and advancing the catheter
through the needle 60 into the vein, the needle 60 is withdrawn
from the puncture site axially along the exterior of the catheter
tube 66.
The wings 22 and 24 are disposed generally horizontally, and the
needle 60 is oriented with its axis in a plane somewhat parallel to
the plane containing the blank 20, such that the sharp beveled end
62 thereof is located essentially central of the axial length of
the groove 52. As best illustrated in FIG. 3, the needle 60 is
placed in one axial groove, shown as axial groove 52, with the
pointed tip of the needle bevel 62 disposed in the plane containing
the weakened portion or fold line 41 between the wings 22 and 24.
Clearly, the size of the grooves 50 and 52 must be compatible with
the outside diameter of the needle 60 and vice versa.
With the needle 60 properly oriented and located within the groove
52, the wings 22 and 24 are moved arcuately relative to each other
as indicated by arrow 61, the movement being essentially pivotal
about the weakened portion or fold line 41. The projecting element
30 is inserted into and snugly received by the correspondingly
sized aperture 32, and the flat faces 26 and 28 will meet. The
groove 50 will then be disposed over the portion of the needle 60
and bevel 62 which is exposed above the groove 52 to fix the
sharpened bevel 62 of the needle 60 within the wings 22 and 24.
The resulting structure, illustrated in FIG. 4, is a unitary
protection device which shields the bevel 62 of the needle 60 from
the arm 70 of a patient. Moreover, the needle 60 and the catheter
66 are fixed in axial alignment and relative movement therebetween
is substantially obviated. Nevertheless, any relative movement
which might possibly occur, will not damage the catheter 66 because
axial alignment of the catheter 66 and the needle 60 is preserved
by the grooves 50 and 52. When the needle 60 has been thus
disabled, it is preferred that the unitary tab 20 be secured to the
arm 70 such as with a strip of tape 72 to prevent inadvertent
removal of the catheter tube 66 from the arm.
The invention may be embodied in other specific forms without
departing from the spirit or essential characteristics thereof. The
present embodiment is, therefore, to be considered in all respects
as illustrative and not restrictive, the scope of the invention
being indicated by the appended claims rather than by the foregoing
description, and all changes which come within the meaning and
range of equivalency of the claims are therefore to be embraced
therein.
* * * * *