U.S. patent number 3,889,675 [Application Number 05/482,878] was granted by the patent office on 1975-06-17 for suction-irrigator.
This patent grant is currently assigned to Stewart Research, Inc.. Invention is credited to James M. Stewart.
United States Patent |
3,889,675 |
Stewart |
June 17, 1975 |
Suction-irrigator
Abstract
A suction-irrigating instrument having a working tip structure
and a supply handle structure, each constructed of a pair of
interconnected tubes, and means for connecting the supply tubes of
the handle structure with the delivery tubes of the working tip,
said connecting means including a resilient tubular connector for
controlling the flow of fluid delivered by the instrument and
having a diaphragm integral with the walls of the connector and
mounted across its internal bore, and a slit in the diaphragm
having sides that normally abut each other to thereby close the
bore but which spread apart upon application of the operator's
fingers to the outside of the connector.
Inventors: |
Stewart; James M. (West Palm
Beach, FL) |
Assignee: |
Stewart Research, Inc. (West
Palm Beach, FL)
|
Family
ID: |
23917808 |
Appl.
No.: |
05/482,878 |
Filed: |
June 25, 1974 |
Current U.S.
Class: |
604/34; 251/342;
137/846 |
Current CPC
Class: |
A61M
1/7415 (20210501); A61M 39/22 (20130101); A61M
1/774 (20210501); A61M 1/7411 (20210501); Y10T
137/7882 (20150401); A61M 1/85 (20210501) |
Current International
Class: |
A61M
1/00 (20060101); A61M 39/22 (20060101); A61M
39/00 (20060101); A61m 003/00 () |
Field of
Search: |
;128/240,224,276
;251/342 ;137/525.3,526 ;32/33 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Attorney, Agent or Firm: Finnegan, Henderson, Farabow and
Garrett
Claims
What is claimed is:
1. A suction-irrigating instrument comprising:
a. a working tip structure having first and second passages for
delivering fluid and applying a vacuum respectively to a work
area;
b. a supply handle structure having first and second passages for
supplying fluid and vacuum from sources of supply;
c. means for connecting said passages in the handle structure to a
supply of fluid and a source of vacuum; and
d. means for connecting the passages in the handle with the
passages in the working tip, said means including a valve assembly
for controlling the amount of fluid delivered by the instrument,
said valve assembly having at least a part of its length exposed
for contact by the fingers of the operator and comprising:
i. a resilient tubular connector having an internal bore
communicating at one end with the fluid supply passage in the
handle and at the other end with the fluid delivering passage in
the working tip,
ii. a diaphragm integral with and mounted across the bore of the
connector; and
iii. a slit in the diaphragm having sides that normally abut each
other to thereby close the bore but which spread apart and permit
passage of fluid upon application of and deformation of the
diaphragm by pressure from the operator's fingers.
2. A suction-irrigating instrument comprising:
a. a working tip structure having a pair of interconnected tubes to
form a unitary structure, said tubes delivering fluid and applying
a vacuum respectively to a work area;
b. a supply handle structure having a pair of interconnected tubes
forming a unitary structure;
c. means for connecting said supply tubes to a supply of fluid and
a source of vacuum; and
d. means for connecting the supply handle tubes with the working
tip tubes, said means including a valve assembly for controlling
the flow of fluid delivered by the instrument, said valve assembly
having at least a part of its length exposed for contact by the
fingers of the operator and comprising:
i. a first resilient tubular connector having an internal bore
communicating at one end with the fluid supply tube and at the
other end with the fluid delivering tube,
ii. a diaphragm integral with and mounted across the bore of the
connector, and
iii. a slit in the diaphragm having sides that normally abut each
other to thereby close the bore but which spread apart and permit
passage of fluid upon application of and deformation of the
diaphragm by pressure from the operator's fingers.
3. The instrument of claim 2, wherein the diaphragm bulges toward
the fluid supply so that the pressure of the supply fluid keeps the
sides of the slit closed against each other.
4. The instrument of claim 3, wherein the diaphragm is
hemispherical shaped and the slit runs transversely across the
perimeter of the sphere.
5. The instrument of claim 4, including finger-engaging lugs on
opposite outsides of the tubular connector for applying pressure to
the connector in a direction parallel to the length of the slit to
thereby spread apart the sides of the slit.
6. The instrument of claim 5, wherein the lugs comprise thickened
wall portions on the outside of the connector.
7. The instrument of claim 2, wherein the vacuum delivery tube and
the vacuum supply tube are integrally connected to form one
continuous tubular member.
8. The instrument of claim 2, wherein the vacuum delivery tube and
vacuum supply tube fit into one another to provide connection
between the tubes.
9. The instrument of claim 2, wherein the connecting means includes
a second resilient tubular connector the vacuum supply tube with
the vacuum delivery tube.
10. The instrument of claim 9, wherein the second tubular connector
is integrally connected with the first tubular connector to provide
a unitary structure for interconnecting the working tip with the
supply handle structure.
11. The instrument of claim 10, including a vacuum relief hole in
the second tubular connector.
12. The instrument of claim 11, wherein the tubular connectors are
arranged in vertical relationship with the first tubular connector
on top and the finger-engaging lugs and valve slit arranged in a
generally horizontal direction and the vacuum relief hole on the
bottom of the second tubular connector.
Description
The present invention relates to surgical instruments, and more
particularly, to a readily disposable suction-irrigating instrument
for delivering sterile fluid and applying suction to an operating
work area.
Suction-irrigating instruments have long been used in surgical
procedures to facilitate the cleaning and lavage of wounds to
maintain visibility, prevent dehydration of exposed tissue, wash
out debris and cool selected tissue when desired.
Conventionally, the irrigating and suction devices have been
combined in a single piece of surgical equipment for convenient
one-hand use by the operator. Exemplary of such an instrument is
the device shown in my U.S. Pat. No. 3,749,090 issued July 31,
1973. This instrument consists essentially of a universal handle,
having finger control means for the fluid and suction that can
accommodate a plurality of readily interchangeable and, if
desirable, disposable working tips depending on the application for
which the instrument is being used. The handle is completely
sterilizable so that after each use the work tool can be removed,
and disposed of if desired, and the handle independently sterilized
for reuse. While the instrument has significantly reduced sources
of contamination often transmitted by improperly or unsterilized
and reused surgical instruments and has greatly increased the
versatility of suction-irrigators by permitting rapid and varied
interchange of the working tips, the trend in the surgical industry
has been toward completely disposable instruments mostly for
convenience and ease in use but also in an attempt to virtually
eliminate any source of contamination through reuse.
For example, only the needles of hypodermic syringes used to be
thrown away after each use; the plunger and barrel of the syringe
being sterilized and used again. Nowadays, however, in practically
all hospitals and doctor' offices across the country, the whole
syringe including the barrel and plunger as well as the needle are
typically discarded after only one use.
Obviously, one of the basic factors permitting disposal of what
would otherwise appear to be reusable items, is the cost involved.
The cost of sale of each instrument therefore must be brought down
to the level where it can compete with the per-use cost of its more
permanent predecessor, taking into consideration the nuisance and
costs involved in sterilization and the risk of contamination
through transmission of improperly sterilized instruments.
The age of plastics and modern molding techniques have have
certainly been a contributing factor, but also many significant
inventions have been developed that have permitted heretofore
expensive surgical instruments to be produced as one-use,
disposable items.
This trend has not failed to extend to suction-irrigators.
Accordingly, it is an object of the present invention to provide a
new and unique suction-irrigator that is reliable and convenient in
use but that can be produced inexpensively enough to make it
completely disposable.
A further object of this invention is to provide such a
suction-irrigating instrument that can be operated by one hand,
readily attached to its source of suction and fluid, and adaptable
to a wide variety of applications.
Still another object of this invention is to provide a readily
disposable suction-irrigating instrument in which the working tips
can be conveniently and rapidly interchanged if necessary during
use.
Still a further object of this invention is to provide a readily
disposable suction-irrigating instrument that can be produced from
as few as two or three simply molded and readily assembled
parts.
Additional objects and advantages will be set forth in part in the
description which follows and in part will be obvious from the
description or may be learned by practice of the invention.
To achieve the foregoing objects and in accordance with its
purpose, the disposable suction-irrigating instrument of the
present invention comprises a working tip structure having first
and second passages for delivering fluid and applying vacuum
respectively to a work area, and a supply handle structure having
first and second passages for supplying fluid and vacuum,
respectively, from a source of supply. Means are further provided
for connecting the working tip passages with their respective
supply handle passages, said means including a valve assembly for
controlling the supply of fluid delivered by the instrument in
which the valve has at least a part of its length exposed for
contact by the fingers of the operator. The valve assembly
comprises a resilient tubular connector having an internal bore
communicating at one end with the fluid supply passage of the
supply structure and at the other end with the fluid delivering
passage of the working tip, a diaphragm integral with and mounted
across the bore of the connector, and a slit in the diaphragm
having sides that normally abut each other to thereby close the
bore but which spread apart and permit passage of fluid upon
application of and deformation of the diaphragm by pressure against
the outside of the connector from the operator's fingers.
In a preferred embodiment, the supply and working tip structures
are constructed of a pair of interconnected tubes to form unitary
structures and the connecting means includes a second resilient
tubular connector interconnected to the tubular connector housing
the fluid valve assembly. This second connector also has an
internal bore communicating the vacuum supply tube with the vacuum
delivering tube and has a relief hole for finger control of the
amount of suction being applied by the instrument.
In yet another preferred embodiment, and when only a single purpose
instrument is desired, the vacuum passages of the supply handle and
working tip structures are interconnected to form one continuous
tubular member, the connecting means then consisting essentially of
only the tubular connector having the valve assembly for
controlling the flow of fluid delivered by the instrument.
The accompanying drawings which are incorporated in and constitute
a part of the specification illustrate preferred embodiments of the
invention and together with the description serve to explain the
principles of the invention.
Of the drawings:
FIG. 1 is a perspective view of a disposable suction-irrigating
instrument constructed in accordance with one embodiment of the
present invention;
FIG. 2 is an enlarged and fragmentary side sectional view of the
embodiment of FIG. 1, showing the interconnected tubular connectors
for connecting the working tip to the supply handle together with
the finger operable fluid and suction relief valves;
FIG. 3 is a partial sectional view taken along the lines 3--3 of
FIG. 2 and showing the fluid valve in open position;
FIG. 4 is a fragmentary side-sectional view similar to FIG. 2 of
another embodiment of the present invention showing a single
tubular connector connecting only the fluid supply passage of the
working tip to the supply handle structure and housing a finger
operable fluid valve assembly; and
FIG. 5 is a partial perspective view of the single tubular
connector of FIG. 4.
It is to be understood that both the foregoing general description
and the following detailed description are exemplary and
explanatory but are not restrictive of the invention.
With reference to FIG. 1, and in accordance with one embodiment of
the present invention, the disposable suction-irrigating instrument
includes a working tip generally 10, comprising a first tube 12 for
supplying an irrigating fluid to the work area and a second tube 14
for drawing suction, tube 14 being interconnected with tube 12 to
form a unitary structure. Irrigating tube 12 has an internal
passage 13, an exit or work end 16 and an opposite entrance end 18.
Suction tube 14 has an internal passage 15, an exit or work end 20
and an entrance end 22.
Work ends 16 and 20 of tool 10 are of a generally downwardly curved
shape as illustrated in FIG. 1 to facilitate their placement in the
work area. Other shapes for the work tool, however, can be used
with the present invention as is well known to those skilled in the
art.
The instrument also includes a supply handle 23 consisting of a
fluid supply tube 24 and a suction supply tube 26 interconnected to
provide a unitary structure and adapted for rapid detachable
connection to a source of sterilized fluid and suction. Suitable
fittings (not shown) but as shown, for example, in my
aforementioned patent may be provided on the ends of tubes 24 and
26 for quickly connecting fluid supply tube 24 to a fluid supply
hose 31 and vacuum supply tube 26 to a suction hose 33. Fluid
supply tube 24 has an internal passage 25 with an exit end 28 and
vacuum tube 26, an internal passage 27.
Preferably, tip 10 and supply handle 23 are made of injection
molded plastic, such as polyethylene, polypropylene, or the like,
in keeping with the objects of the present invention of providing
an inexpensive and readily disposable instrument. But they could
also be made of metal and hence of a more permanent, sterilizable
nature, if desired, without departing from the scope of the present
invention.
In accordance with the present invention, connecting means are
provided for conveniently connecting the supply handle with the
working tip while at the same time providing at least one
finger-operable valve means for controlling the flows of fluid
delivered by the instrument and, more preferably, to a
finger-operable valve means for also controlling the amount of
applied vacuum.
As best shown in FIG. 2, the connecting means comprises a two-part
resilient tubular connector, generally 32, consisting of first
tubular connector 34 communicating the exit end 28 of fluid supply
tube 24 with the entrance end 18 of fluid delivering tube 12 of tip
10 and a second tubular connector 38 communicating the internal
passage 27 of vacuum supply tube 26 with the internal passage 15 of
vacuum delivering tube 14. Connector 32 is of resilient material
and preferably of molded rubber or silicone and, as best shown in
FIG. 2, houses a fluid valve assembly 36 in first connector 34 and
a vacuum relief hole 40 on the bottom surface of suction connector
38, both being operable by the operator's fingers during use.
Tubular connectors 34 and 38 are interconnected at 39 to form a
unitary structure in keeping with the tip and supply handle.
Valve assembly 36 comprises a hemispherical or dome shaped
diaphragm 42 integral with the side walls of tubular connector 34
and extending across the internal bore 44 of the connector. As best
shown in FIG. 2, the diaphragm projects rearwardly toward fluid
supply tube 24 and has a slit 46 having sides that normally abut
against each other to close the bore and prevent the passage of
fluid. As best shown in FIG. 3, when lateral pressure from the
operator's fingers is applied to the outside of tubular member 34
and in a direction shown by arrows 45, parallel to slit 46, the
sides of the slit spread apart creating an opening 48 to permit
passage of fluid through the valve and out fluid delivering tube
12. Due to the resilient nature of tubular member 34, once the
pressure is relieved, the slit returns to its normally closed
position to thereby stop the flow of fluid. Thus, it can be seen
that the flow of sterilizing fluid can be accurately and
conveniently controlled by the fingers of the operator; the greater
the pressure applied, the wider the opening 48 and hence the
greater amount of fluid supplied by the instrument.
Finger engaging lugs 50 are preferably provided on the outside of
connector 34, which may consist of merely thickened portions of the
connector's walls, to assist the operator in using the instrument.
Preferably, lugs 50 are located horizontally and on opposite sides
of tubular valve 36, so they can be grasped between the thumb and
index finger of the operator.
Since the source of irrigating fluid is generally supplied under
pressure, diaphragm valve 36 bulges rearwardly toward such source
so that the ever present fluid pressure assists in keeping the
sides of slit 46 together and the valve in a closed position. Thus,
only positive outside pressure from the fingers is needed to open
the valve; the resilient nature of the connector and the line
pressure of the fluid automatically closing the valve once such
pressure is relieved.
As best shown in FIG. 2, the entrance end 22 of vacuum delivering
tube 14 fits within the exit end of vacuum supply tube 26, as well
as into tubular connector 38, to provide rigidity to the assembled
instrument. Vacuum relief holes 41 are provided in each tube 14 and
26 that register with relief hole 40 in connector 38 in assembled
condition to thereby provide for finger operable control of the
amount of applied suction. On the bottom of connector 38 there is
preferably provided a flat surface 52 around relief hole 40 for
convenient contact with the index finger of the operator in
controlling the amount of applied suction.
Thus, it can be seen that the disposable suction-irrigator shown in
FIGS. 1 and 2 consists essentially of three parts, each of which
can be inexpensively molded and rapidly assembled to provide a
convenient, reliable, and finger controllable suction-irrigating
instrument. Moreover, by providing a two-part connector 32, as
shown in FIG. 2, work tip 12 can be readily disconnected and
interchanged without having to disconnect the instrument from its
sources of supply.
In accordance with yet another embodiment of this invention and as
shown in FIGS. 4 and 5, the suction-irrigator can also be made from
two parts without affecting the disposability of the instrument. In
this embodiment, suction tube 14 and supply tube 26 are a single
tube 60 interconnected at one end to fluid supply tube 24 and at
the other to fluid delivering tube 12. As best shown in FIG. 4,
exit end 28 of fluid supply tube 24 is connected with the entrance
end 18 of fluid delivering tube 12 by a single resilient tubular
connector 62 similar to tubular connector 34 and having an internal
bore 64 and a similar valve assembly 36, but in this case slit 46
and lugs 50 lie in the opposite or generally vertical direction. By
orienting connector 62 in a vertical direction, bottom lug 50 rests
against a flat 66 on suction supply tube 60 so that the valve can
then be operated merely by pressing down on top lug 50 in the
direction of arrow 68, again spreading the sides of slit 46 apart
and creating an opening 48 for the passage of fluid.
Similar to the embodiment of FIGS. 1 and 2, a relief hole 70 can
also be provided in the bottom of suction tube 60 for engagement by
the index finger of the operator.
By providing a vertical orientation of the valve assembly of
connecting tube 62, it can be seen that the thumb can be used to
operate the fluid valve while the index finger is free for contact
with the relief hole, thus permitting simultaneous control of both
functions of the instrument by the operator's fingers. In contrast
and with a horizontal orientation of the valve assembly of FIG. 1,
the index finger must be rotated down from the valve each time it
is necessary to control the amount of suction being applied by the
instrument.
In any event, however, it can be seen that this embodiment of the
present invention also provides an instrument that can be readily
molded and assembled in an inexpensive manner to permit it to be
readily disposed of after each use.
The invention in its broader aspects is not limited to the specific
details shown and described and departures may be made from such
details without departing from the principles of the invention and
without sacrificing its chief advantages.
* * * * *