JP2006325813A - Water feeding device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water feeding device which never requires to switch a special water feeding passage and a water feeding passage using a treatment device insertion channel and prevents residual water from flowing after halting feeding of water. <P>SOLUTION: The water feeding device has a first water feeding tube 15b connected to a water jet tube 15a provided in an endoscope, a second water feeding tube 18 guided inside a body to be observed through the treatment device insertion channel 17a to supply a liquid, and a water feeding pump part 30 for feeding the liquid in a tank 34, and is equipped with a switching valve 36 which selectively feeds the liquid from the water feeding pump part 30 to either the first feeding tube 15b or the second feeding tube 18. Instead of placing the switching valve 36, pumps for the first and second water feeding passages are provided at the water feeding pump part, and two pumps are switched. Moreover, a connecting tube on the output side of feeding water of the water feeding pump 30 and the first water feeding tube 15b are made of a hard synthetic resin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an endoscope water supply device, in particular, a dedicated water supply pipe disposed in an endoscope and various water supply pipes used through a treatment instrument insertion channel or a water supply pipe provided in a treatment instrument. The present invention relates to a configuration of an endoscope water supply device for supplying a liquid into a body to be observed.

  2. Description of the Related Art Conventionally, in an endoscope apparatus, a dedicated water supply pipe (so-called water jet pipe) is provided inside an endoscope (scope), and a physiological saline for washing is applied to an object to be observed (such as an affected area) by a water supply pump unit. Supplying the chemical | medical solution etc. for a treatment is performed. This water pipe is disposed separately from the air / water pipe for cleaning the observation window of the objective optical system.

  On the other hand, in the endoscope apparatus, a treatment instrument insertion channel for introducing various treatment instruments into the observed body is provided, and a water supply tube of various diameters is passed through the treatment instrument insertion channel, so Injecting liquid according to the difference or the like is performed. According to this, since a water supply tube having a diameter different from that of the water jet pipe is used, there is an advantage that the water supply range (the width of the water supply port), the amount or the speed can be selected according to the situation.

In recent years, a treatment instrument having a water supply line is also used. For example, in a high-frequency knife for excising living tissue by high-frequency incision, washing water such as physiological saline is supplied from a water supply line provided during cautery incision. By feeding, the bleeding part and the like are washed.
JP 2002-177208 A JP 2001-321332 A

  By the way, it is wasteful in configuration to arrange a water supply pump unit (water supply device) for supplying liquid to each of the water supply pipes used through the above-described endoscope internal water supply (water jet) pipelines and treatment instrument insertion channels. Conventionally, connecting each pipe line to a connection pipe of one water pump unit is used. However, there is a problem that the replacement between the water jet tube and the water supply tube that uses the treatment instrument insertion channel is complicated, and wastes time for replacement during endoscopic observation and treatment. There is an inconvenience.

  Further, conventionally, since a soft tube such as a silicon tube is used for the water supply connection tube for connecting the water jet tube and the water supply pump unit, the residual water in the tube remains even after the water supply switch is stopped. There has been a problem that a phenomenon (so-called creep) in which water is fed occurs. That is, when the flow velocity increases toward the jet port of the water supply pipe (the jet port in the case of a water jet pipe) (the flow rate increases), the soft tube expands due to the water supply pressure, and the liquid present in this expanded portion performs the water supply operation. After stopping, it will flow out.

  The present invention has been made in view of the above problems, and its purpose is to eliminate the need for replacement of the dedicated water supply line and the water supply line using the treatment instrument insertion channel, and facilitate endoscopic observation and treatment. Another object of the present invention is to provide an endoscope water supply device that can be performed and that does not allow residual water to flow out after stopping water supply.

In order to achieve the above object, an endoscope water supply apparatus according to the invention of claim 1 is connected to an endoscope water supply pipe (water jet pipe) for supplying a liquid into a body to be observed. Various first water supply pipes and various second water supply pipes for supplying liquid, which are guided into the body to be observed through the treatment instrument insertion channel of the endoscope, and the liquid in the reservoir are supplied by a pump. A water supply pump section and a pipe switching means for selectively supplying the liquid in the storage section to the first and second water supply pipes are provided.
According to a second aspect of the present invention, as the conduit switching means, a switching valve that switches between the first water supply conduit and the second water supply conduit between the water supply pump section and the first and second water supply conduits. Is provided.
The invention of claim 3 is characterized in that as the pipe switching means, the water pump section is provided with a first water pipe pump and a second water pipe pump, and these two pumps are switched and operated. To do.
The invention of claim 4 is characterized in that the connecting pipe connecting the water pump unit and the switching valve and the first water supply pipe are hard synthetic resin pipes.

According to the configuration of the second aspect, for example, the first water supply line and the second water supply line are switched by a switching valve such as a three-way cock, and the desired water supply line can be changed without changing each water supply line. Can be carried out.
According to the configuration of claim 3, the first water supply pipe is connected to the first water supply pipe pump, the second water supply pipe is connected to the second water supply pipe pump, and these pumps are selected by a foot switch or the like. By operating automatically, water supply to a desired water supply pipe line can be performed.
According to the configuration of the fourth aspect, the connection pipe connecting the water supply pump section and the switching valve and the first water supply pipe line are made of a hard synthetic resin pipe, so that even when a relatively high water supply pressure is applied, the expansion No residual water flows out after the water supply is stopped.

  According to the endoscope water supply apparatus of the present invention, it is not necessary to replace the dedicated water supply pipe (water jet pipe) with the water supply pipe using the treatment instrument insertion channel, and the endoscope observation and treatment can be performed quickly. Can be done. Moreover, by using a hard synthetic resin pipe, it is possible to prevent the residual water from flowing out after the water supply is stopped.

  1 and 2 show the configuration of the endoscope water supply device according to the first embodiment. As shown in FIG. 1, an endoscope (electronic endoscope) 10 includes an insertion portion. 10A, the operation part 10B, and the cable part 10C, and is connected to the light source device 13 of the figure by the connector 12 of this cable 10C. In the case of an electronic endoscope, the cable 10C is also connected to a processor device. The endoscope 10 is provided with various pipe lines therein, and a water jet pipe (dedicated water supply pipe line) 15a is disposed from the distal end of the insertion portion 10A to the rear end portion of the operation portion 10B. In order to clean the observation window (lens surface) of the objective optical system provided at the distal end of the insertion portion 10A through the nozzle, an air / water feed pipe 16a is provided on the distal end side, and this air / water feed pipe 16a is provided. An air supply pipe 16b and a water supply pipe 16c are provided so as to communicate with each other.

  Further, the endoscope 10 is provided with a treatment instrument insertion channel 17a that also serves as a suction pipe and a suction tube 17b that communicates with the treatment instrument insertion channel 17a. The treatment instrument insertion channel 17a includes a position of the operation unit 10B. A forceps port (treatment tool insertion port) 20 is provided in the upper part. Then, the second water pipe 18 is inserted from the forceps port 20 into the treatment instrument insertion channel 17a. The second water pipe 18 has various diameters and is made of a hard synthetic resin. In addition, there are water pipes and the like provided in a treatment instrument such as a high-frequency knife.

  The air supply pipe 16b and the water supply pipe 16c for cleaning the observation window described above are provided with an air supply / water supply operation valve (switch) 22 and a tank (first water supply tank) 23 connected to the air supply pipe 16b. Is connected to a pump 24 in the light source device 13 (or a separate body) via a connecting tube 16d, and air and water are supplied to the observation window by, for example, a two-stage pressing operation of the air / water supply operation valve 22. It can be performed. The suction tube 17b is provided with a suction operation valve (switch) 27 in the middle thereof, and is connected to a suction device through a connection tube of the connector 12, and the contents in the observed body are operated by the operation of the suction operation valve 27. Objects and the like can be sucked (through 17a and 17b) and discharged.

  Further, the endoscope water supply device is provided with a water supply pump unit 30 for supplying a liquid to the body to be observed. The water supply pump unit 30 includes a pump unit main body 31 having a motor and a control circuit, A pump 32 disposed on the front side of the main body 31, a foot switch 33 for performing water supply operation, and a tank (second water supply tank) 34 are provided, and this tank 34 is connected to the pump 32 (input port) via a connecting pipe 15d. Is done. For example, this pump 32 has a soft water supply tube arranged on the circumference of the outer periphery of the rotating body, a pressing body that rotates while crushing the tube is attached to the outer periphery of the rotating body, and the rotating body is rotated. It is configured to feed water by extruding the liquid in the tube.

  In the embodiment, a first water supply pipe 15b and a connecting pipe 15c are provided to connect the pump 32 (output port) and the water jet pipe 15a disposed in the endoscope 10, and this first feed is provided. Between the water pipe 15b and the connecting pipe 15c, a pipe switching valve (1 input, 2 output) 36 comprising a three-way stopcock, a choke valve, etc. is provided. One input of this switching valve 36 is connected to the pump 32 side. The 1st water pipe 15b and the 2nd water pipe 18 are connected to pipe 15c and 2 outputs.

  FIG. 2 shows the operating state of the switching valve 36. FIG. 2 (A) shows that the connection pipe 15c on the pump 32 side and the first water supply pipe 15b are connected (opened) by operating the lever of the switching valve 36. ) (The second water pipe 18 is closed). When the lever is rotated 90 degrees counterclockwise from this state, the connection pipe 15c on the pump 32 side and the second water pipe 18 are connected (the first water pipe). 15b is closed).

  According to the first embodiment, by manually operating the mechanical switching valve 36, water supply using the water jet tube 15a (first water supply tube 15b) provided in the endoscope, and forceps Either water supply tubes of various diameters led out through the treatment instrument insertion channel 16a from the mouth 20 or water supply using the second water supply pipe 18 comprising a water supply pipe provided in a treatment instrument such as a high-frequency knife. It is possible to select, and it is possible to execute water supply under various conditions according to the observation / treatment status. In addition, it is also possible to supply water to both the pipes 15a and 18 by operating the switching valve 36.

  3 and 4 show the configuration of an endoscope water supply apparatus according to the second embodiment. This second embodiment is composed of a first water supply pipe pump and a second water supply pipe pump. Is provided. As shown in FIGS. 3 and 4, the pump body 39 is provided with a first pump 32A and a second pump 32B, and the first water supply pipe 15b is connected to the output port of the first pump 32A. The second water pipe 18 is connected to the output port of the second pump 32B. The tank 34 is connected to the input ports of the first and second pumps 32A and 32B by a connecting pipe 15e.

  Further, as shown in FIG. 4, in the pump section main body 39, pump drive circuits 39a and 39b including motors for driving the first and second pumps 32A and 32B, and a foot switch 40 which is a water supply operation switch. Is provided with a control circuit 39c for inputting the signal from the above and switching and controlling the two pump drive circuits 39a and 39b. The foot switch 40 is composed of a two-stage push switch, and the control circuit 39c drives the first pump 32A by a one-step push operation of the foot switch 40, and drives the second pump 32B by a two-stage push operation. As the water supply operation switch, two foot switches 33 similar to those in the first embodiment may be arranged corresponding to the two pumps 32A and 32B.

  According to the second embodiment, by operating the foot switch 40, one of the first pump 32A and the second pump 32B is operated, and water supply using the water jet pipe 15a (and the first water supply pipe 15b) is performed. Any one of water supply using the second water supply pipe 18 which is a water supply pipe provided in a treatment instrument such as a water supply tube of various diameters or a high-frequency knife through the treatment instrument insertion channel 17a can be selected for observation.・ Water supply under various conditions according to the treatment status can be executed. It is also possible to operate both pumps 32A and 32B.

  FIGS. 5 to 8 show specific configurations of the water pump unit and the tank of the first embodiment (which can also be used in the second embodiment), and are shown in FIGS. 5 and 6. As described above, the main body 31 of the water pump section (device) 30 is provided with a power switch 44, a connection section 45 of a foot switch 33, and the like, and the pump 32 has a tank side connecting pipe 15d connected to its input port 46. The endoscope-side connecting tube 15 c is connected to the output port 47. In this embodiment, the connecting pipe 15c (water supply output side) and the first water supply pipe 15b connected to the water jet pipe 15a are not hardened or reduced even when the water supply pressure is increased. A resin tube, for example, a tube formed of a material such as Teflon (registered trademark) or polytetrafluoroethylene (fluororesin) is used. The second water pipe 18 is also a similar synthetic resin pipe.

According to the connecting pipe 15c and the first water supply pipe 15b of such a hard synthetic resin pipe, after the water supply is stopped by the foot switch 33, the residual water in the pipe flows out from the outlet of the water jet pipe 15a at the distal end of the endoscope. There is nothing. FIG. 7 shows the relationship between the operation of the foot switch 33 of the embodiment and the amount of water fed from the outlet of the water jet pipe 15a. The connecting pipe (15c) is a soft synthetic resin pipe such as a silicon tube. In FIG. 7A, after the foot switch 33 is turned off [FIG. 7A], the expanded soft synthetic resin tube contracts, and the residual water in the tube is fed as shown by the dotted line in FIG. There has been continued until the end t ₁ (few seconds to 8 seconds). However, according to the synthetic resin connecting pipe 15c of rigid embodiment, after turning off the foot switch 33, as indicated by a solid line in FIG. 7 (B), the water supply of the residual water (less than 1 second) immediately at the end t ₂ As a result, the creep phenomenon was greatly improved.

  5 and 6, the connecting pipe 15d connected to the input port 46 of the pump 32 is divided into two branches via a pipe switching valve (3-way stopcock, etc., two inputs, one output) 49, The (liquid) take-out pipes 53 of the two tanks 34 are connected to the bifurcated connecting pipe 15d via a luer lock 50 which is a rotary screw coupling type connector. Therefore, in the embodiment, when the liquid in one tank 34 runs out, the liquid in the other tank 34 can be used by switching the input pipe of the switching valve 49. Further, while the other tank 34 is in use, one tank 34 can be replenished with liquid or a new tank 34 can be replaced.

  The tank 34 is formed to have a capacity of 1000 ml or more. In other words, the conventional tank capacity is about 500 ml, and 200 to 300 ml or more per case is used for observing and treating the mucous membrane of the observation site in the observation and treatment in the endoscope. Often less than the correct amount of liquid. However, in the embodiment, since it has a capacity of 1000 ml or more, it is possible to secure the amount of liquid necessary for four or more cases.

Further, as shown in FIG. 6, the height of the tank 34 is set to be substantially the same as or lower than the height H _{1 of the} pump section main body (housing) 31. The storage arrangement is efficiently performed. That is, in the endoscope apparatus, as an external apparatus constituting the system other than the endoscope (scope), various apparatuses such as a processor apparatus, a light source apparatus, a recording apparatus, and a pump and a tank for supplying and supplying air to the observation window. It is necessary to store these devices in a system rack or the like having a plurality of storage spaces. Therefore, in the embodiment, as shown in FIG. 6, the height of the tank 34 is made substantially the same (or low) as that of the pump unit main body 31, and the storage space surrounded by the partition plate 55 such as the system rack is efficiently provided. It is trying to fit well.

FIG. 8 shows the configuration of the liquid take-out pipe (exit pipe) of the tank 34, and the tank 34 of the embodiment is not like the conventional one (like the tank 23 of FIG. 1), but from the cap 34a. Instead, a part of the take-out pipe 53 is integrally formed from the upper part to the bottom face along the tank side face, and the pipe port 53E is provided on the bottom face part. According to this, since the take-out pipe 53 does not affect the height of the tank 34, the upper end position of the cap 34 a is set to the height H of the pump body 31 compared with the case where the take-out pipe 53 is arranged on the cap 34 a. was increased to _1, the height of the tank 34 can make the tank capacity in the case of the height of the pump body 31 and substantially the same, which is advantageous even when the capacity or more 1000 ml.

It is a figure which shows a structure when the water supply apparatus for endoscopes which concerns on 1st Example of this invention is applied to an endoscope. It is a figure which shows the switching operation | movement of the switching valve of 1st Example. It is a figure which shows a structure when the water supply apparatus for endoscopes of 2nd Example is applied to an endoscope. It is a figure which shows the detailed structure of the water supply apparatus for endoscopes of 2nd Example. It is a perspective view which shows the structure of the water supply pump part and tank of 1st Example apparatus. It is a figure which shows a structure when the water supply pump part and tank of a 1st Example apparatus are arrange | positioned in a system rack. It is a figure which shows the relationship between the operation | movement [FIG. (A)] of the foot switch for water supply of an Example, and the water supply amount [figure (B)] of a water jet. It is a partial cross section figure showing the composition of the tank of an example.

Explanation of symbols

10 ... endoscope, 15a ... water jet tube,
15b ... 1st water pipe, 15c, 15d, 15e ... Connection pipe,
17a: treatment instrument insertion channel, 17b: suction tube,
20 ... forceps opening, 18 ... second water pipe,
30 ... Water pump part 31 ... Pump part body,
23, 34 ... tank, 32, 32A, 32B ... pump,
33, 40 ... foot switch, 36, 49 ... switching valve,
53 ... (Liquid) take-out pipe.

Claims (4)

A first water supply line connected to an endoscope water supply line for supplying liquid into the body to be observed;
Various second water supply conduits that are guided into the body to be observed through the treatment instrument insertion channel of the endoscope and supply liquid;
A water supply pump for supplying the liquid in the reservoir by a pump;
An endoscope water supply apparatus, comprising: a conduit switching means for selectively supplying the liquid in the reservoir to the first and second water supply conduits.   As the conduit switching means, a switching valve for switching between the first water conduit and the second water conduit is provided between the water pump section and the first and second water conduits. The endoscope water supply apparatus according to claim 1.   2. The first water supply pipe pump and the second water supply pipe pump are provided as the pipe switching means in the water pump section, and the two pumps are switched to operate. Endoscope water supply device.   The endoscope water supply device according to any one of claims 1 to 3, wherein the connection pipe connecting the water supply pump section and the switching valve and the first water supply pipe are hard synthetic resin pipes.