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Description  |
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BACKGROUND OF THE INVENTION
This invention relates to a suction control device for an endoscope mounted
on the endoscope body for sucking, for example, a body liquid or filth in
the body cavity of a human being via a channel formed in the endoscope
body, thereby to discharge it to the exterior, and for sending a medical
treatment fluid such as a stupefacient or contrast material into the body
cavity via said channel, by being fitted with the tip end portion of an
injection instrument such as a syringe.
Where, in observing the interior of the body cavity utilizing the
endoscope, a body liquid, filth or expectoration are present at the
affected part of the body cavity, they constitute an obstacle to the
observation and simultaneously blur the view field objective lens of the
endoscope. Accordingly, it is required to remove such obstacle by
operating the aforesaid suction control device. Furthermore, when it is
desired to observe a digestive organ, it becomes necessary to eliminate
superfluous air therefrom, and for deaerating the organ the suction
control device is used.
The conventional suction control device comprises an outer tube connected
to a suction instrument via a suction pipe, an inner tube slidably
disposed within the outer tube and normally raised up to a normal position
by the biasing force of a spring, an insertion pipe provided separately
from said outer tube so as to communicate with the channel of the
endoscope body, to permit, for example, a forceps to be inserted into the
channel from the upper end opening portion of said pipe, and enable a
medical treatment fluid to be injected into the channel by fitting the tip
end portion of an injection instrument to said opening portion, and a
communicating port for allowing the insertion pipe to communicate with
said outer tube. Said communicating port is generally so constructed that
it is normally so closed by the inner tube as to fail to perform the
communicating action. And in inserting, for example, a forceps, or
injecting a medical treatment fluid, the communicating port remains closed
to prevent the sucking action from reaching the channel. In this case,
since air is sent into the suction device from the upper end opening
portion of the inner tube, application of an excessive load to the suction
instrument is prevented. On the contrary, in sucking, for example, a body
liquid, the upper end opening portion of the insertion pipe is first
closed by, for example, a rubber stopper and simultaneously the upper end
opening portion of the inner tube is closed with the operator's finger,
and the inner tube is then pushed down against the biasing force of the
spring, whereby to open the communicating port. Since, at this time, the
sucking action comes to reach the interior of the insertion pipe and,
further, the channel via the communicating port, a body liquid, for
example, within the body cavity is sucked into the suction pipe by being
passed through the channel, insertion pipe, communicating port and outer
tube.
As above described, in sucking, the closure by the rubber stopper of the
upper end opening portion of the insertion pipe and the manual closure of
the inner tube are required each time sucking is effected, so that the
sucking operation becomes extremely troublesome.
Particularly, in the case of a bronchoscope observation among the endoscope
observations, frequent sucking operations are required for removing an
expectoration, blood having come out of the body organ or for preventing
blurring the view field objective lens. Also very often a stupefacient has
to be injected in order to cause the patient's cough to stop during said
sucking operations by fitting the injection instrument into the opening
portion of the insertion pipe over and over again as required or contrast
material has to be injected for the purpose of taking an X-ray photograph
of the bronchia. For the foregoing reasons, the construction wherein the
insertion pipe is provided separately from the inner and outer tubes as in
the construction of the prior art device renders it extremely difficult to
permit the viewer or observer to carry out a quick operation and
simultaneously produces the possibility of an erroneous operation.
Further, in the case of the above mentioned bronchoscope observation, the
operation delay has a bad influence on the patient's respiration function,
which particularly requires a quick operation.
For the purpose of achieving the foregoing speediness of the operations as
much as possible, the prior art device has been improved, for example, by
forming the upper end opening portion of the insertion pipe into a shape
permitting it to be readily fitted with an injection instrument such as a
syringe, which however has not yet attained a sufficient effect.
On the other hand, where it is desired to achieve the speediness of the
operations, the washing and disinfecting operations of the suction control
device inevitably required before the device once used is again employed
should be performed in a shorter time. Such device washing and
disinfecting operations are required for preventing infection due to
infective pathogenic bacteria, and generally are carried out with respect
to the whole of the endoscope including the suction control device.
In the endoscope fitted with the prior art suction control device, however,
the suction control device is assembled in a manner integral with the
endoscope body and simultaneously is complicated in its construction,
which fails to cause the suction control device to be washed and
disinfected to a sufficient extent.
SUMMARY OF THE INVENTION
One feature of the suction control device according to the invention
resides in the specific construction wherein a cylindrical surrounding
wall member for at least partially surrounding the outer circumference of
the insertion pipe and defining a space therewith is provided, to which a
suction pipe is connected; and an opening means for allowing the interior
of the insertion pipe to communicate with the space is provided, the upper
end opening plane of the insertion pipe being made substantially flush
with the upper end opening plane of the space.
This suction control device having the foregoing feature enables the
respective upper end opening portions of the insertion pipe and the space
to be closed at one time by the operator's finger, so that the suction
operation can be quickly or speedily carried out, which eliminates the
major drawbacks encountered with the prior art device.
Another feature of the suction control device according to the invention
resides in that the body of the suction control device is detachably
fitted to the endoscope body. To this end, a receiving member for being
fitted with the wall member to receive the same therein is secured to the
endoscope body, the space between the receiving member and the wall member
being retained in a liquid tight condition by seal means. And under the
condition where the suction control device is in use, the wall member is
fitted into the receiving member and is separably locked to the fitted
position by locking means.
This suction control device having such feature can be subjected to a
satisfactory washing and disinfection by disconnecting the device body
alone from the endoscope body and yet enables the washing and disinfecting
operations to be speedily performed in safety.
In one embodiment of the suction control device of the invention, the space
between the insertion pipe and the wall member is provided concentrically
with respect to the longitudinal axis of the insertion pipe. Accordingly,
the device as a whole can be made compact and for closing the respective
opening portions of the space and the insertion pipe with the operator's
finger can more easily be carried out.
Within the insertion pipe there is disposed a sliding tube urged by the
spring so as to be normally held in a raised position, and said sliding
tube is lowered upon fitting of the injection instrument into the upper
end opening portion of the insertion pipe, thereby to close the opening
means. Accordingly, when a medical treatment fluid such as a stupefacient
or contrast material is sent into the channel by the injection instrument,
the sucking action of the suction device on the channel is automatically
stopped to enable the entry of the treatment fluid to be speedily or
quickly conducted with high efficiency.
Further, in order that the suction control device may be more effectively
washed and disinfected, the insertion pipe is rendered detachable from the
wall member, and is separably fixed at the fitted position by a fixing
ring.
In another embodiment of the invention, the arrangement is such that when
the injection instrument is fitted into the upper end opening portion of
the insertion pipe, the opening means is closed directly by the tip end
portion of said instrument. For this reason, the tip end portion of the
instrument is somewhat deeply inserted into the insertion pipe, the outer
circumference of said tip end portion being exactly fitted to the inner
wall of the insertion pipe. The foregoing construction simplifies the
device structure without deteriorating the device function.
Accordingly, a primary object of the invention is to provide a suction
control device for an endoscope which enables the sucking or injection
operation to be quickly or speedily performed.
Another object of the invention is to provide a compact suction control
device for an endoscope which is easily subjected to washing and
disinfection by rendering the device body alone detachable from the
endoscope body.
Other objects and advantages will become apparent from the content of
hereinafter described embodiments and the content of the appended drawings
.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view, partly in section, of the base end section of an
endoscope fitted with a suction control device of the invention;
FIG. 2 is a longitudinal sectional view of a first embodiment of the
suction control device of the invention;
FIG. 3 is an enlarged top surface view of FIG. 2;
FIG. 4 is an enlarged cross sectional view taken along line 4--4 of FIG. 2;
FIG. 5 is an enlarged cross sectional view taken along line 5--5 of FIG. 2;
FIG. 6 is a fragmental view taken along line 6--6 of FIG. 2;
FIG. 7 is a longitudinal sectional view of the suction control device of
FIG. 2, illustrating the condition in which the tip end portion of an
injection instrument is inserted into the upper end opening portion of an
insertion pipe;
FIG. 8 is a longitudinal sectional view of a second embodiment of the
suction control device of the invention;
FIG. 9 is an enlarged top surface view of FIG. 8;
FIG. 10 is a longitudinal sectional view of a third embodiment of the
suction control device of the invention;
FIG. 11 is a longitudinal sectional view of a fourth embodiment of the
suction control device of the invention; and
FIG. 12 is a top view of FIG. 11.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, only the base end section of an endoscope body 10 is
shown, while the distal end section thereof which is to be inserted into a
human body cavity being observed is not shown. Further, in FIG. 1, the
flexible tube section of the endoscope body 10 connecting the distal end
section to the base end section is partially shown. The endoscope body 10
itself has a conventional construction, namely, is formed interiorly with
a main channel 11 for allowing the passage therethrough of an image guide
fiber bundle or light guide fiber bundle and provided at the base end with
an eyepiece portion 12. The viewer or operator performs various operations
while viewing the eyepiece portion 12.
As shown in FIG. 1, the endoscope body 10 has attached thereto a suction
control device according to the invention. The device is connected to a
tube 13 extended into the main channel 11. The tube 13, as shown in FIG.
2, has an interior channel 14 for permitting the insertion or, for
example, a forceps therethrough. The tube 13 is extended up to the distal
end section not shown.
The structure of the suction control device will hereinafter be described
by reference to FIG. 2.
To the endoscope body 10 is secured a cylindrical receiving member 15, the
lower end portion of which is connected to the end portion of the tube 13
and formed with a hole (not numbered) communicating with the channel 14
within the tube 13. The receiving member 15 is provided at the upper end
edge with a radially outwardly projecting flange 15a, and at the lower
inner wall with a circumferential stepped portion 15b, and is further
provided with a slit 15c having a desired width in a manner extending from
the upper end thereof in the direction of the axial line thereof. Said
flange 15a is formed with a pair of notches 16 diametrically facing each
other as seen from FIG. 4.
A cylindrical insertion pipe 17 has a through bore 18 extending in the
axial direction thereof, said through bore 18 being open both at the upper
end and at the lower end. The inner wall surface of the through bore 18 at
the upper end opening portion 17a of the insertion pipe 17 is so formed as
to have an upwardly somewhat flaring tapered surface, which is suited for
allowing the tip end portion of an injection instrument such as a syringe
to be exactly fitted thereto as later described. The insertion pipe 17 is
provided at the upper end portion with a pair of engagement projections 19
which project radially outwardly and diametrically face each other. The
insertion pipe 17 has at its inner circumferential surface an axial
annular recess 20, said recess 20 receiving a coil spring 21. Further the
lower end portion 17b of the insertion pipe 17 is provided at one side
with a communicating port 22 constituting opening means and a rotation
preventing cut-out 23 for preventing the pipe 17 from being rotated about
its longitudinal axis.
A cylindrical wall member 24 surrounds the insertion pipe 17. Accordingly,
between the wall member 24 and the insertion pipe 17 is created an annular
space 25 concentrical to the pipe 17, said space 25 communicating with the
through bore 18 via the communicating port 22. The opening plane of the
upper end opening portion 25a of the space is made substantially flush
with the opening plane of the upper end opening portion 17a of the through
bore 18. The space 25 is divided at the upper end opening portion into two
parts by said pair of engagement projections 19.
To one side surface of the wall member 24 is attached one end of a suction
pipe 26, which communicates with the space 25. The other end of the
suction pipe 26 is connected to a suction instrument (not shown). The
surrounding wall member 24 is provided at its lower inner wall with a
circumferential stepped portion 24a, to which is detachably fitted the
lower end portion 17b of the insertion pipe 17. In the fitted condition,
the through bore 18 communicates with the channel 14 of the tube 13 via a
bore (not numbered) formed in the lower end portion 24b of the wall member
24 and another bore (not numbered) formed in the lower end portion of the
receiving member 15. Further, in the fitted condition, a screw 27 is
screwed into the wall member in the proximity of its lower end and is
engaged with the rotation preventing cut-out 23, preventing the insertion
pipe 17 from being rotated relative to the wall member 24.
The surrounding wall member 24 is detachable from the receiving member 15,
and the lower end portion 24b of the member 24 abuts against the stepped
portion 15b of the receiving member. A seal ring 28 provides a liquid
tight condition between the members 24 and 15. When the wall member 24 is
fitted into the receiving member 15, the suction pipe 26 is entered into
the slit 15c of the receiving member 15.
In this manner, the device body 29 including the wall member 24 and the
insertion pipe 27 is rendered detachable from the receiving member 15, in
other words, from the endoscope body 10.
The upper end portion of the cylindrical surrounding wall member 24 is
provided at its outer circumference with a threaded portion 24c and a
flange 24d. The flange 24d extends radially outwardly and engages the
radially inwardly extending flange 30a of a locking ring 30. The locking
ring 30, as shown in FIG. 4, is provided at the lower end edge with a pair
of radially inwardly extending locking projections 30b diametrically
facing each other, said projections 30b corresponding to said pair of
notches 16 formed in the flange 15a. When, as shown in FIG. 4, this
correspondence is maintained, the projections 30b may pass through the
notches 16, so that locking between the members 15 and 24 is not achieved.
When the ring 30 is rotated from the position of FIG. 4 in a clockwise or
counter-clockwise direction, the projection 30b is engaged with the flange
15a, so that the receiving member 15 is locked to the wall member 24, so
that the device body 29 is held in the fitted position within the
receiving member 15. If, in case the body 29 is disconnected from the
member 15, the locking ring 30 is rotated until the projection 30b comes
to correspond to the notch 16, the body 29 may be pulled out readily in
axial direction. It is to be noted here that the ring 30 is formed at the
outer circumference with an anti-skid knurled portion so as to be easily
rotatable manually by the operator.
A support ring 31 is fitted over the threaded portion 24c of the wall
member 24 by screw engagement, and simultaneously urges the locking ring
30 downwardly via a ring-like spring 32. The ring 30 is prevented from
being carelessly rotated by the action of this spring 32. Further, the
support ring 31 is fitted into a fixing ring 33 by screw engagement. The
fixing ring 33 is formed at the upper end edge with a radially inwardly
extending flange 33a which engages the pair of engagement projections 19
of the insertion pipe 17. By fitting the fixing ring 33 over the support
ring 31 by screw engagement, the flange 33a urges the projections 19
downwardly, so that the insertion pipe 17 is firmly fitted into the wall
member 24. By releasing the screw engagement between the fixing ring 33
and support ring 31, the insertion pipe 17 can be pulled out from the
member 24. It is to be noted that the outer circumference of the fixing
ring 33 is also formed with an anti-skid knurled portion.
Within the insertion pipe 17 is disposed a sliding tube 34, the outer
circumference of which is formed with a radially outwardly extending
flange-like projection 34a which extends into said recess 20. The
projection 34a is engaged by the upper end of the coil spring 21 which
normally presses the projection 34a against the upper end of the recess 20
shown in FIG. 2. The sliding tube 34 is normally maintained in a raised
position as shown in FIG. 2 by the spring 21. The tube 34, however, can be
lowered from the raised position in an axially sliding manner against the
spring 21, and the arrangement is such that when the sliding tube 34 is
lowered, the lower end portion 34b thereof closes the communicating port
22. That is to say, the tube 34 functions to render ineffective the
communicating action of the port 22 constituting opening means.
A rubber-made valve 35 is provided within the lower end portion 34b of the
sliding tube 34 so as to close the interior hole thereof. The valve 35, as
shown in FIG. 5, is formed with a plurality of slits extending radially
outwardly from the center of the valve, said slits permitting the passage
of a treating instrument such as a forceps or the passage of a
stupefacient or contrast material forcibly flowed-in by an injection
instrument but permitting little passage of, for example, a body liquid
sucked out of the body cavity by a sucking appliance. Said valve 35 is
fixed at the illustrated position by a pressing ring 37 fitted into the
lower end portion 34b of the sliding tube 34.
The manner in which the suction control device having the foregoing
construction is operated will now be described.
The endoscope is inserted into the body cavity of a human being or patient
which is to be observed and the operator or viewer observes the affected
portion of the body cavity through the endoscope while viewing the
eyepiece portion 12. Simultaneously, the operator operates the suction
control device. Where obstacles such as a body liquid, filth or
expectoration are present at the affected portion of the body cavity, they
have to be removed by the sucking operation.
With a suction instrument (not shown) operated, the operator, as shown in a
two dots-dash line in FIG. 2, places his finger on the upper end of the
suction control device, i.e., both on the upper end opening portion 17a of
the insertion pipe 17 and on the upper end opening portion 25a of the
space 25, thereby closing both opening portions 17a and 25a. Since both
opening portions 17a and 25a are disposed concentrically to each other,
they can be fully closed with the finger. Furthermore, since the
arrangement is so that the opening planes of both opening portions 17a and
25a are rendered substantially flush with each other, the opening portions
17a and 25a can easily be closed with the finger.
Upon closure of both opening portions 17a and 25a, the sucking action
reaches the channel 14 from the suction pipe 26 via the space 25,
communicating port 22 and through bore 18, so that, for example, a body
liquid within the body cavity is introduced into the channel 14, sent into
the suction control device, and then flows into the suction pipe 26. When
such body liquid is sent with force into the suction control device, it is
liable to escape upwardly through the interior bore 36 of the sliding tube
34. Since, however, the valve 35 prevents such escape of the liquid, the
liquid smoothly flows from the through bore 18 to the space 25 via the
communicating port 22.
Upon releasing the closure of both opening portions 17a and 25a, the
sucking action substantially ceases to reach the channel 14. And the
suction flow, as shown by a broken line of FIG. 2, is directed to the
suction pipe 26 from the upper end opening portion 25a. This is because
the opening area of the upper end opening portion 25a is made larger than
the flowing area of the channel 14. In this case, it is to be noted that
another suction flow from the upper end opening portion 17a of the
insertion pipe 17 to the suction pipe 26 via the valve 35, communicating
port 22 and space 25 is effected.
Where a medical treatment fluid such as an anesthesia agent or contrast
material is sent into the body cavity through the channel 14, the tip end
portion 38a of an injection instrument 38 for forcibly sending the fluid
out is fitted into the upper end opening portion 17a of the insertion pipe
17, as shown in FIG. 7. At this time, the sliding tube 34 is pushed
downwardly by the injection instrument 38, and as a result is lowered from
the raised position against the biasing force of the spring 21, thereby
automatically closing the communicating port 22 with the lower end portion
34b of the sliding tube 34. For this reason, the sucking action comes to
have no effect on the through bore 18 and channel 14. As a result, the
suction flows are reduced in number to a single flow directed from the
upper end opening portion 25a of the space 25 to the suction pipe 26 as
indicated by a solid line of FIG. 7. The presence of said single flow
prevents an excessive load from being applied to the suction instrument
(not shown) even when the communicating port 22 is closed.
The tip end portion 38a of the injection instrument 38 is formed into a
tapered configuration, and the upper end opening portion 17a of the
insertion pipe 17 is formed into a shape conformed with said tapered
configuration. Accordingly, the injection instrument 38 is exactly fitted
into the opening portion 17a. Accordingly, it is possible to forcibly send
a desired fluid into the body cavity from the injection instrument 38 via
the interior bore 36 of the sliding tube 34, through bore 18 and channel
14. Since, in this manner, the communicating port 22 is automatically
closed by the action of the sliding tube 34 in response to the fitting
operation of the injection instrument 38, the sucking or injection
operation is simplified.
When the injection instrument 38 is withdrawn from the upper end opening
portion 17a, the sliding tube 34 is returned again to the raised position
by the biasing force of the spring 21, thereby to open the communicating
port 22.
A treatment instrument such as a forceps other than the previously
mentioned injection instrument 38 can of course be inserted into the
channel 14 from the upper end opening portion 17a of the insertion pipe
17. Where said treatment instrument is inserted, it is not particularly
necessary to close the communicating port 22 utilizing the lowering
operation of the sliding tube 34.
In FIGS. 8 and 9, a second embodiment of the suction control device of the
invention is shown. This embodiment will hereinafter be described with the
parts and sections thereof associated with those of the first embodiment
denoted by the same reference numerals.
In this embodiment, the sliding tube 34 of the first embodiment is not
provided within the cylindrical insertion pipe 17. The aforesaid action of
the sliding tube, i.e., the action that it automatically closes the
communicating port 22 in response to the fitting operation of the
injection instrument 38 is achieved by the tip end portion 38a of the
instrument 38. In this embodiment, as indicated by a two dots-dash line of
FIG. 8, the tip end portion 38a of the instrument 38 is not only inserted
into the upper end opening portion 17a of the insertion pipe 17 but also
is further inserted deeply into the through bore 18, thereby directly
closing the communicating port 22 constituting opening means formed at the
side wall of the insertion pipe 17 so as to permit the through bore 18 to
communicate with the space 25 annularly provided around the insertion tube
17.
That is to say, by forming the tip end portion 38a of the injection
instrument 38 so as to cause it to have a slightly larger length and
forming the through bore 18 so as to cause it to have a length conforming
with the length of the elongated tip end portion 38a, the injection
instrument 38 itself is permitted to render ineffective the communicating
action of the communicating port 22 through being fitted into the through
bore 18. Therefore, the sliding tube becomes unnecessary.
In the second embodiment, the cylindrical surrounding wall member 24 is
formed integral with the insertion pipe 17, and the space 25 is defined
between the member 24 and the pipe 17 concentrically with respect to the
longitudinal axis of the pipe 17 as shown in FIG. 9. The upper end opening
portion 17a of the insertion pipe is made substantially flush with the
upper end opening portion 25a of the space 25, and yet both opening
portions 17a and 25a are respectively so formed as to have a size
permitting both to be readily closed by the operator's finger.
To one side of the wall member 24 is connected one end of the suction pipe
26, thereby causing the pipe 26 to communicate with the space 25. The
other end (not shown) of the suction pipe 26 is connected to the sucking
appliance (not shown). The device body 29 comprising the wall member 24
and the insertion pipe 17 is detachably received within the receiving
member 15 secured to the endoscope body 10. The lower end portion 24b of
the wall member 24 is provided with a seal ring 28 for causing a liquid
tight condition to be attained between the members 24 and 15. The
receiving member 15 is connected to one end of the tube 13 having the
channel 14.
The position at which the injection instrument 38 is fitted into the
insertion pipe 17 is determined by the engagement between the tapered
surfaces of both the instrument 38 and the pipe 17.
Although in this embodiment, the locking means for locking the receiving
member 15 into the device body 29 is not provided, provision of this
means, however, is easy when viewed from the standpoint of design.
In FIG. 10, a third embodiment of the suction control device of the
invention is shown. This embodiment has a construction very similar to
that of the second embodiment shown in FIGS. 8 and 9. The distinguishable
point of this embodiment from the second embodiment resides in that the
communicating port 22 is formed in the tapered upper end opening portion
17a of the insertion pipe 17. Accordingly, when the injection instrument
38 is fitted into the pipe 17, by causing the tapered surface of the tip
end portion 38a of the instrument 38 to engage the tapered surface of the
upper end opening portion 17a of the pipe as indicated by a two dots-dash
line of FIG. 10, the instrument 38 is permitted to render ineffective the
communicating action of the communicating port 22 constituting opening
means. For this reason, the tip end portion 38a of the instrument 38 can
do without being so formed as to have a particularly large length. Since
the other constituent portions of this embodiment are the same as those of
the second embodiment, they are only denoted by the same reference
numerals and a description thereof is omitted.
A fourth embodiment of the suction control device of the invention
illustrated in FIGS. 11 and 12 is also similar in construction to the
second embodiment of FIGS. 8 and 9. The distinguishable point of this
embodiment from the second embodiment resides in that the space 25 between
the cylindrical insertion pipe 17 and the wall member 24 is not annular
but made crescent as shown in FIG. 12. Namely, the space 25 can not only
be provided in a manner annular and concentrical to the insertion pipe so
as to surround the whole outer circumference of the insertion pipe as in
the preceding embodiments but also can be so formed as to at least
partially cover the outer circumference of the pipe as in this embodiment.
Accordingly this embodiment indicates the possibility of modifying such
space 25. Also in the foregoing construction, the upper end opening
portion 17a of the insertion pipe 17 is positioned flush with the upper
end opening portion 25a of the space 25, both opening portions 17a and 25a
being so formed as to have a size permitting them to be readily closed by
the operator' s finger.
Also in this embodiment, the tip end portion 38a of the instrument 38 is
inserted from the upper end opening portion 17a of the pipe 17 deeply into
the through bore 18, thereby closing the communicating port 22. Since the
other constituent portions of this embodiment are the same as those of the
second embodiment, they are only denoted by the same reference numerals
and a description thereof is omitted.
As above described, the suction control device of the invention enables the
sucking operation of, for example, a body liquid from the body cavity of a
human being and the supply of a medical treatment fluid such as an
anesthesia agent or contrast material through fitting the injection
instrument into the insertion pipe, to be extremely readily performed, so
that a quick and safe medical treatment can be carried out using the
endoscope. Furthermore, where it is desired to subject the device to
washing or disinfection, it can reliably be conducted because the device
body is capable of being readily disconnected from the endoscope body.
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