U.S. patent number 3,835,854 [Application Number 05/296,204] was granted by the patent office on 1974-09-17 for catheter advancing device with nip rollers.
This patent grant is currently assigned to Jewett-Ashley Holding Corp.. Invention is credited to Warren R. Jewett.
United States Patent |
3,835,854 |
Jewett |
* September 17, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
CATHETER ADVANCING DEVICE WITH NIP ROLLERS
Abstract
A device for inserting a catheter into a body such as a vessel,
vein, artery or channel comprising a housing member adapted to
receive a flexible catheter and having a hollow needle for guiding
the catheter. A drive moves the catheter through this needle.
Inventors: |
Jewett; Warren R. (Orange,
CT) |
Assignee: |
Jewett-Ashley Holding Corp.
(Milford, CT)
|
[*] Notice: |
The portion of the term of this patent
subsequent to September 17, 1974 has been disclaimed. |
Family
ID: |
21769217 |
Appl.
No.: |
05/296,204 |
Filed: |
October 6, 1972 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
15039 |
Feb 27, 1970 |
|
|
|
|
Current U.S.
Class: |
604/159;
604/160 |
Current CPC
Class: |
A61M
25/0113 (20130101) |
Current International
Class: |
A61M
25/01 (20060101); A61m 005/00 () |
Field of
Search: |
;128/214,214.2,214.4,347-349,350,DIG.6 ;226/181,188,189
;242/84.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: McGowan; J. C.
Parent Case Text
This application is a continuation of Application Ser. No. 15,039,
filed Feb. 27, 1970, now abandoned.
Claims
What is claimed is:
1. A hand-holdable device for antiseptically inserting a catheter
into a vessel a predetermined distance, said device comprising: a
housing member for antiseptic storage of said catheter, said
housing member having a first side, a hollow needle supported in
said housing member, said housing member defining a passage for
antiseptically moving a flexible catheter to said hollow needle,
said passage being adjacent the entrance to said hollow needle, and
drive means interiorly adjacent said first side for engaging and
moving said catheter through said passage and said needle;
said drive means comprising a pair of rollers positioned to rotate
on parallel, spaced apart, axes and to form a nip for said catheter
between the rims of said rollers, at least one of said rollers
having a second portion opposite said housing side of diameter
greater than the diameter of the portion of the roller that engages
and moves said catheter; wherein a catheter receiving space is
defined by said nip, said second portion and said housing side
aligned with said passage and said needle, whereby said catheter is
prevented from binding therein, said catheter is maintained
adjacent said nip and said catheter is guided smoothly to said
needle.
2. The device of claim 1 wherein said housing member defines a
first chamber adapted to receive said flexible catheter and a
second chamber adapted to antiseptically enclose said pair of
rollers.
3. The device of claim 1 wherein each of said rollers has a second
portion of diameter greater than the portions of the rollers which
engage and move said catheter, said second portions being spaced
apart to permit removal of said catheter therebetween.
4. The device of claim 1 further including a pair of gears in
meshing engagement, said rollers being attached one to each of said
gears for rotation therewith.
5. The device of claim 4 further including means operatively
associated with one of said gears for imparting said rotation.
6. The device of claim 4 including a shaft, one of said gears and
one of said rollers being mounted on said shaft internally of said
housing, and a knob mounted on said shaft externally of said
housing.
7. The device of claim 1 further including means for securing the
distal end of said catheter to said housing member.
8. The device of claim 1 wherein said needle has a slot defined
along the length thereof to allow removal of a catheter
therefrom.
9. The device of claim 1 wherein said needle is provided with an
enlarged end portion, said housing member defines a chamber adapted
to receive said enlarged end portion, said device having a slot
defined in said needle and end portion along the length
thereof.
10. The device of claim 1 wherein said housing member has a slot
extending along the length thereof to permit removal of a catheter
in said housing.
11. The device of claim 2 wherein said needle has a slot defined
therein along the length thereof, and said housing has a slot
defined therein along the length thereof, said slots being
continuously aligned to permit withdrawal of a catheter from said
housing and said needle.
12. The device of claim 3 further including a shaft, means
operatively associated with one of said second portions for
imparting rotation thereto, said roller and said second portion
being mounted on said shaft internally of said housing, and a knob
mounted on said shaft externally of said housing.
13. The device of claim 1 wherein the distal end of said catheter
is adapted to receive the exit end of a syringe, whereby fluid may
be injected into said catheter from said syringe.
Description
This invention relates to a device for inserting a catheter into a
blood vessel and more particularly to a device for moving a
catheter through a blood vessel.
As is well known, a catheter is a tube which may be inserted into
the body for various purposes including removal or injection of
fluids into the body. A catheter may be inserted into a blood
vessel for the purpose of feeding intravenously, as well as for
other purposes. Therefore, the catheter has to be maintained in a
sterile condition before and during the time it is used. A method
currently in use in the art is to make an incision in the blood
vessel and then pass the catheter therein. It can be appreciated
that such a method is fraught with difficulties. This is especially
true since the catheter has to be manually handled before insertion
into the blood vessel. As a result, antiseptic conditions are
difficult to maintain and it is also difficult to force the
catheter through the blood vessel a predetermined distance.
Accordingly, an object of this invention is to provide a new and
improved device for inserting a catheter into a vessel.
Another object of the invention is to provide a new and improved
device for forcing a catheter through a vessel antiseptically.
Another object of this invention is to provide a new and improved
device for guiding a catheter in a vessel and moving it
therein.
A further object of the invention is to provide a new and improved
device for inserting a catheter into a vessel wherein the length of
the catheter that is forced into the blood vessel is readily
determined.
Briefly stated, the invention in one form thereof comprises a
housing carrying a hollow needle which receives a catheter and
guides it into a vessel. A drive means carried by the housing moves
the catheter through the needle and the vessel.
The invention accordingly comprises the features of construction,
combination of elements and arrangement of parts which will be
exemplified in the construction hereinafter set forth, and the
scope of the invention will be indicated in the claims.
For a fuller understanding of the nature and objects of the
invention, reference is had to the following description, taken in
connection with the accompanying drawings, in which:
FIG. 1 is a perspective view showing the device of this invention
forcing a catheter through a blood vessel into close proximity to
the heart organ.
FIG. 2 is a side elevational view of the device of this
invention.
FIG. 3 is a view taken along line 3--3 of FIG. 2.
FIG. 4 is a view taken along line 4--4 of FIG. 3.
FIG. 5 is a view taken along line 5--5 of FIG. 3.
FIG. 6 is a perspective side view of the hollow needle and bushing
used with the device of this invention.
FIG. 7 is a view taken along line 7--7 of FIG. 3.
FIG. 8 is a plane view of a device embodying the invention being
utilized in conjunction with a syringe.
FIG. 9 is a sectional view seen in the plane of line 9-9 of FIG.
8.
FIG. 10 is a top plan view of another device embodying the
invention; and
FIG. 11 is a sectional view seen in the plane of lines 11--11 of
FIG. 10.
One use of the device of the invention is shown in FIG. 1, where
the device 10 is mounted to the arm 12 of a person. A catheter is
forced through the vessel, shown by dotted lines 14, until it is in
close proximity to a desired location, such as the heart 16. The
catheter is then detached from the device, as explained below, and
used for its intended purpose, such as intravenous feeding or the
like. It should be understood that, although the preferred
embodiment is described for use in inserting a catheter into a
blood vessel, the device can be used to insert and force a catheter
through any irregular passage.
Referring to FIGS. 2 - 7, which illustrate a preferred embodiment
of this invention, the device comprises a frame or housing member
18 having a removable top member 20 which snaps on and off the
member 18 by means of pins 22. As shown in FIG. 3, member 18 has a
large chamber 24 defined therein for containing therein the bulk of
a flexible catheter 26. The distal end of catheter 26 is attached
to a conical portion 28 which is received in a complimentary shaped
passageway 30. The chamber 24 extends into a channel 32 which leads
into another channel 34. The channel 34 leads to a second chamber
36. Located in chamber 36 is a bushing member 38 connected to a
hollow needle 40. Needle 40 extends through passageway 42
externally of frame 18.
The needle 40 and bushing 38 are more clearly shown in FIGS. 6 and
7. Needle 40 is formed with a sharp point 44 at one end so that it
may easily penetrate the skin. Both the bushing 38 and needle 40
are formed with longitudinal slots 47 and 48 therein, throughout
their entire length, so that the catheter may be removed therefrom
by pulling the catheter in the direction of arrow 50. As shown in
FIG. 7, the walls of the needle positively retain the catheter.
However, the catheter is sufficiently flexibly deformable that it
may be pulled from the needle, as shown in FIG. 6. Bushing 38 and
needle 40 may be formed as a single member or as separate members
which are suitably connected.
The catheter 26 is moved from chamber 24 through needle 40 once the
needle has been inserted into the blood vessel of a patient by a
drive means 52. The drive means 52 is positioned in two chambers 54
located adjacent passageway 34 and comprises two roller members 56
and 58 which act upon catheter 26 so that, upon rotation of said
rollers, the catheter is driven in the desired direction. Spur
gears 60 and 62 are connected to roller members 56 and 58,
respectively, so the rollers rotate together. Attached to one of
the spur gears (such as spur gear 62) is a knob 63 on a shaft 64.
Gear 62 and roller 58 are mounted fast on shaft 64. Upon rotation
of knob 63 the gears 60 and 62 and roller members 56 and 58,
connected thereto respectively, will rotate to force catheter 26
through the needle 40.
The present device provides means by which the length of the
catheter forced into the blood vessel of the patient may be
accurately determined. When most of the catheter has been passed
out of chamber 24, the conical portion 28 in channel 30 will
terminate the movement of the catheter through the blood vessel.
Thus, only a predetermined length of catheter will be forced into
the blood vessel.
The catheter 26 is inserted into the device under antiseptic
conditions and a cover (not shown) is provided for needle 40 for
anitseptic purposes. In operation, the shsarp point 44 of needle 40
is forced into the blood vessel and the handle 62 is rotated until
no further movement of catheter 26 is observed. Movement of the
catheter 26 can be observed through slot 48. Additionally, cover 20
may be transparent so that the user may observe the catheter 26 in
chamber 24. Top 20 is then removed which will also remove roller
drive means 52. The conical portion 28 is then passed out of
channel 30 and the external length of the catheter is taken out of
frame 18. The needle 40 is then removed from the blood vessel of
the patient and the catheter 26 may then be removed from the needle
40 and bushing 38 in the manner illustrated in FIG. 6. Funnel
portion 28 may then be attached to an intravenous feeding bottle or
other device, as required. The needle 40 and bushing 38 are
discarded. The frame 18 and removable top 20 may also be discarded
since they are very inexpensive to manufacture. However, if
desired, the frame 18 and top 20 may be sterilized and used
again.
Another embodiment of the invention is shown in FIGS. 8 and 9
together with the manner in which a device embodying the invention
may be utilized with syringe without removal of the catheter. The
operating members of FIGS. 8 and 9 are identical to those shown in
FIGS. 2 - 7 and, therefore, bear the same reference numerals with
the exception of the housing. A syringe 68 comprising a reservoir
69 and plunger 70 has a conical stopper portion 71 adapted to be
received within conical member 28 and provide an air tight fit.
Syringe 68 carries needle 72 adapted to extend into catheter 26 for
injection of fluid into the subject through the catheter. When the
catheter has been inserted the desired distance as determined
either by predetermined length being fully extended or by reading
calibration marks C thereon, as shown in FIG. 6, plunger 70 may be
depressed to inject fluid in reservoir 69. If it is desired to
withdraw a fluid located at the distal end of catheter 26 plunger
70 is withdrawn to create a low pressure in reservoir 69 and draw
fluid from the subject into this reservoir.
As exemplified in FIG. 9 the housing may be molded in any desirable
external configuration and comprises upper and lower members which
are positioned by pins 74 in the same manner that top member 20 is
positioned with respect to housing 18 in the embodiment, shown in
FIGS. 2 - 7.
Another embodiment of the invention wherein the entire apparatus is
disposable is shown in FIGS. 10 and 11. A housing member 75
defining the chambers 24 and 36 together with the chambers 54 for
the drive means comprises a bottom member 76 and top members 77 and
78 sealed thereto and defining a slot 81 extending the length of
housing 75. In this embodiment the drive means comprises a drive
roller 82 and an idler roller 83 positioned within the chambers
54.
It will be noted that the rollers 82 and 83 have upper portions 82
a and 83a of increased diameter. These portions serve to correctly
space the rollers in their chambers and also insure retention of
the catheter between the rollers during operation. The spacing
between portions 82a and 83a, however, is selected to be of
sufficient dimension to allow the catheter to be removed therefrom
in the same manner as it is removed from the needle, as shown in
FIG. 7.
Drive roller 82 is mounted to a shaft 84 internally of housing 75
and a knob 85 is mounted to shaft 84 externally of housing 75. The
slot 81 defined between the top member 77 and 78 runs the length of
housing 75 and permits the catheter 79 together with its end piece
86 to be withdrawn from housing 75. Thereafter the housing 75 and
the operating mechanism therein may be disposed of as refuse.
The rollers 82 and 83 and also the rollers 56 and 58 in the
embodiments of FIGS. 2 - 9 are positioned so as to engage the walls
of the catheter with sufficient friction to drive the catheter
through the needle and move the catheter into its intended passage.
However, the rollers are also arranged such that when the catheter
is fully extended and the driving knob is further turned that the
frictional engagement will be insufficient to pull the catheter or
disengage the catheter from its conical end piece by allowing the
rollers to slip on the walls of the catheter.
Preferred catheters are those of silicon rubber, hydro-acrylics,
and others which exhibit the desired degree of flexibility and
surface smoothness. It will be understood that the needles may be
secured to the housing as by having one end secured therein when
the housing is molded.
It may thus be seen that the objects of the invention set forth, as
well as those made apparent from the preceding description, are
efficiently attained. Since changes in the disclosed embodiments of
the invention, as well as other embodiments thereof which do not
depart from the spirit and scope of the invention may occur to
others skilled in the art, the appended claims are intended to
cover all embodiments and modification to the disclosed embodiments
of the invention which do not depart from the spirit and scope
thereof.
* * * * *