JPS62194848A - Cauterizing hemostatic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cautery and hemostasis device in which a means for changing the volume by water pressure is provided in the middle of a water supply system.

[Prior art] In recent years, by inserting an elongated insertion section into a body cavity,
BACKGROUND OF THE INVENTION Endoscopes that can perform diagnostic or therapeutic procedures within body cavities without requiring incisions from the body surface are widely used. In addition to observation means, this endoscope is generally equipped with a hollow channel through which various V1 shellfish can be inserted. Various therapeutic procedures can be performed under visual observation.

For example, M in the body cavity! In the device of Japanese Patent Application No. 192278/1984, a heating element with good heating and cooling response is used to cut out a tumor or to stop bleeding from a wound such as an ulcer. By forming an ablation probe equipped with a water supply channel and a discharge nozzle for cleaning the cap, the surrounding tissue can be necrotized (4). An intermediate chassis is provided in the power supply of the cautery and hemostasis device to separate the electrical system and waterway system into upper and lower parts, and the lower waterway system is equipped with a pump for water supply. This pump pumps water by raising and lowering a piston (1:17") that is rotated by the rotation of the motor, and is designed to discharge cleaning water from the discharge nozzle through the ablation probe's water supply channel. It's Nishide.

[Problems to be Solved by the Invention] In the conventional example described above, the ablation probe itself has a sufficiently small diameter so that it can be inserted into the small diameter endoscope channel.
The resistance of the water supply channel becomes extremely high, and in small pumps, the piston moves back and forth, creating a pulsating water flow. There was a problem that the number of revolutions of the washing machine decreased, and washing water could not be sufficiently discharged.

The above disadvantages can be solved by increasing the pump capacity, but
If such a pump were used, the limbs of the device would become very large. In addition, the water distribution system also has to be designed to be able to withstand even higher pressure, which causes other inconveniences.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a cautery hemostasis device that can reduce the burden on the pump and can sufficiently supply water even with a small pump.

[Means and effects for solving the problems In the present invention,
A volume converter whose volume changes depending on the pressure is provided on the discharge side of the liquid feeding means in the water channel system communicating with the water channel of the ablation probe to generate pulsating water pressure.

This reduces the peak pressure of the pump and reduces the load on the pump.

[Example] Hereinafter, the present invention will be specifically described with reference to the drawings.

FIGS. 1 to 5 relate to the first embodiment of the present invention.
The figure is a sectional view showing the structure of the elastic part that functions as a volume converting means in the first embodiment, FIG. 2 is a perspective view showing the external appearance of the first embodiment, and FIG. 3 is a waterway system part. 4 is a longitudinal cross-sectional view of the first embodiment, and FIG. 5 is a water pump; FIG.

The cautery hemostasis device 1 of the first embodiment shown in FIG.
A power supply device 3 provided with an operation panel 2 on the front side, an ablation probe device 6 detachably connected to the power supply device 3 through an electrical connector 4 and a water supply connector 5, and a cable 7 connected to the power supply device 3. The washing water tank 10 is detachably attached to the side of the power supply device 3, and a foot switch 9 is detachably attached to the power supply device 3 via a connector 8.

The ablation probe equipment 6 includes an elongated and flexible sheath 11, an ablation probe 12 connected to the tip of the sheath 11, and the electrical connector 4 provided on the base side of the sheath 11. The sheath 11 and the ablation probe 12 at its tip can be inserted into a channel of a treatment instrument 11 of an endoscope (not shown), and the ablation probe 12 is inserted into the body cavity through this channel. It looks like this. A coaxial cable is inserted into the sheath 11 along the center in the axial direction to energize a heating element installed inside the ablation probe 12 at the tip, and the outer circumferential axis of the coaxial cable inside the sheath 11 In this direction, a water supply channel is formed to forcefully feed cleaning water to a plurality of nozzles formed on the outer periphery of the ablation probe 12. Then, connect the electric connector 4 and water supply connector 5 on the base side of this ablation probe device 6 to the power supply device rf13, and press the foot switch 9.
Connect the connector 8 of the cable 7 to the power supply 3,
Turn on the main switch 3a of the power supply device 3 by 1°, and select and set the heating (2) and cleaning water supply setting buttons 2a and 2b provided on the operation panel 2, and then turn the foot switch 9 on the cleaning water supply side. By suppressing the switch 9a, the water pump 13 shown in FIG. cautery probe 1
2. Water is sent from the nozzle on the outer periphery toward the affected area in the body cavity to wash away blood, etc. in the affected area, or by pressing the heating switch 9b side of the switch 9, the water is sent through the coaxial cable in the sheath 11 to the tip of the body cavity. The heating element within the ablation probe 12 is energized so that it can be heated to a predetermined temperature.

The power supply device 3 is constructed as shown in FIGS. 3 and 4. That is, in this power supply device 3, a lower horizontally extending intermediate chassis 16 is disposed inside a box 15, and an upper chamber 15a.
and a lower chamber 15b, an electrical system 17 consisting of various circuits for supplying electricity to a heating element installed in the ablation probe 12 is provided in the upper chamber 15a, and the ablation probe is in the lower chamber 15b. A water channel system 18 for forcefully feeding cleaning water to the nozzle formed in 12 is housed.

A board 19a, a transformer, etc. are assembled to the intermediate chassis 16 via support rods, support frames, etc., and various circuits are arranged on this board 19a. or,
An assembly hole 20a is formed in the intermediate seat 16, and a waterproof frame 21 is interposed in this assembly hole 20a, and the water pump 13 is housed in the housing 22 as a water supply means. A pump device 23 is assembled.

The waterproof frame 21 has a concave part in which the pump device 23 is contracted by compression molding, for example, in which a plastic member or the like is placed in a mold, etc., compressed, and then integrally molded.
A low-height recess for 8 is formed. The waterproof frame 21 has a high waterproof ability due to being integrally molded, so that even if water leaks from the water channel system 18, it will not affect the electrical system 17 side. The plunger type water pump 13 housed in the housing 22 has a structure as shown in FIG. 5, for example. That is, when the coil 33 wound around the stator side iron core 32 of the motor 31 is energized, the rotor 34, which is supported so as to be rotatable, is driven to rotate around its rotation axis. By rotationally driving the gear 35 that meshes with a gear V (not shown) installed in the shaft 35, a connecting rod 37 whose one end is connected to a shaft 36 into which the shaft 35a of the gear 35 is fitted is rotated. A screw 38 whose end is reciprocated and connected to the other end
Water can be sent out from the discharge port 39a of the cylinder 39 by reciprocating the cylinder 39 up and down.

Thus, the shaft 35a of the gear 35 passes the end of the cam 3G through the holes 41a of the support part 41, and the cam 36 and the 'hk (35) of the connecting rod 37 connected to the cam 36.
A regulating means is formed to prevent and support the gear r 35 from becoming disconnected from the piston 38 by regulating the movement (lateral swing) in the direction a). The support member 41 is fixed to the iron core 32 in a folded shape.

Further, in the water channel system 18 in the frame 21 separated from the electrical system 17, there is a tube 44 that supplies wash water from the wash water tank 10 to a pump device 23, and the pump device 23 pressurizes and pumps the water. A hard tube 45 through which cleaning water passes is provided. (Figure 5 shows the hard duplex 45.)
However, this hard tube 45 will be connected to the discharge port 39a.

) This hard tube 45 is formed of, for example, a polyethylene-based member, and this hard duplex 45 includes an elastic part 46 as a volume converting means (the volume of which changes with the pressure horn), which is the main part of the first embodiment. and a relief valve 47 that opens when the pressure reaches an appropriate level.

The elastic portion 46 has a structure Δ as shown in FIG.

That is, the elastic portion 46 is formed by housing a soft tube 52 having appropriate elasticity, such as a silicone tube, inside a hard pipe 51 for preventing rupture.

Each end of the flexible tube 52 is fitted into the tapered mouthpiece 53A of the joint 53, and each end of the fitted flexible tube 52 has a female thread that is screwed into the threaded part of the joint 53. It is fixed by a provided tube holding member 54 to prevent it from coming off.

Moreover, the base portion 5 of the joint 53 on the side exposed to the outside
Each end of a hard tube 45 is fitted and connected to each of the tubes 3B, and the outer circumferential side thereof is held in place by a tube holding member 55.

Note that each tube holding member 55 is housed inside a ring 56 screwed onto each end of the hard vibrator 51.

By interposing a soft tube 52 in the middle of the hard tube 45 on the discharge side of the pump device 23, the pulsation of the water flow sent out by the plunger type pump device 23 is alleviated.

That is, due to the pulsating water flow, the water supply pressure periodically repeats high and low values, and when this pressure becomes high, a large load is applied to the water supply pump 13, and the rotation speed of the water supply pump 13 decreases. However, by inserting the flexible tube 52, when the pressure becomes high, the flexible tube 52 expands and relieves the pressure, so the water pump No large load is placed on 13. For this reason, the small water pump 13
However, it is necessary to provide sufficient water supply.

Further, on the outside of the flexible tube 52, the flexible tube 5
2 Cover the inner diameter which is thicker than the outer diameter with the right hard pipe 51,
J: sea urchin, which can prevent the flexible tube 52 from expanding too much in the radial direction and from bursting.

By the way, a recess 61 is formed on the side surface of the box 15 on the lower ff 115b side as shown in FIG.
A connector 62 is attached. This connector 62 is shown as 71-J in FIG. 2 and is connected to the wash water tank 10 via a sea urchin tube 63.

Incidentally, a plug formed as a check valve as shown in the figure is provided at the end of the tube 63.

Further, as shown in FIG. 4, a pressurized water duplex outlet chamber 65 is formed on the front side of the intermediate chassis 16, which is separated from the upper space 158 inside the box 15 by a water shielding plate 64 having a cross-sectional shape. The hard tube 45 is connected from the lower chamber 15b of the outlet chamber 65 to a water supply connector receiver 66 mounted on the front panel of the box.

Incidentally, the relief valve 47, which is interposed in the middle of the rigid duplex 45 together with the elastic part 46, is activated when the pressure exceeds the pressure suitable for water supply.
Water can be supplied by listening to the valve, and if the pressure is below this level, the valve closes to prevent the flushing water being supplied from dripping.

According to the first embodiment configured as described above, since the elastic portion 46 is provided on the discharge side of the water pump 13, the flexible duplex 52 expands when the pressure increases when water is pulsated. Since the increase in water pressure is alleviated, the load on the water pump 13 can be reduced. Therefore, there is no need for the water supply capacity to be excessively large, and even a small pump can be used satisfactorily. Therefore, the cost can be reduced and the size and weight can be reduced. Also, there is no need to make the snow-resistant system excessively durable. In general, there is no need to increase the thickness of the piping portion forming the water supply channel of the ablation probe 12 excessively, and it is possible to prevent the diameter from increasing. Furthermore, since the pump 13 can be prevented from being overloaded due to pulsation, the life of the pump can be extended.

Furthermore, there is no need to increase the inner diameter of the channel of the endoscope.

Furthermore, it is possible to prevent the distal end of the ablation probe 12 from swinging due to the pulsating flow, thereby preventing deterioration of the witnessability in the case of hemostasis.

FIG. 6 shows a second embodiment of the invention.

In this second embodiment, an air chamber member 71 is provided as a volume converter (or volume variable) part in the middle of the hard tube 45 on the discharge side of the pump device.

As shown in FIG. 7, the air chamber member 71 has a base portion 72° 72 to which a hard duplex 45 can be connected, for example, and 51 branches in the middle of these base portions 72, 72 to form a hard container 7.
3 forms an air chamber.

When the water supply pressure increases, the air in the air chamber 71 is compressed, thereby reducing the peak pressure caused by the pulsating flow.

The rest is the same as the first embodiment.

The operation of this second embodiment has substantially the same effects as those of the first embodiment.

FIG. 8 shows a modification of the second embodiment.

In this case, the air chamber member 74 has two ends of the three-pronged member 75 connected to the hard dupe 451 and the oral mouthpiece 76 .
76 is used, and a female thread is formed at the remaining end so that the air chamber container 77 can be freely attached, for example, in a stone-shaped manner by screwing. Further, a bag-like member 78 made of rubber or the like and filled with air is housed within the air chamber container 77. By enclosing air in this bag-like member 78, air in the air chamber container 77 is prevented from being discharged during water supply.

In addition, in order to deal with cases where the water supply system is clogged, etc., in each of the above embodiments, for example in FIG. 1, the flexible tube 52 is
A pressure sensor is installed inside the hard vibrator 51 on the outside of the
Jke, if this pressure sensor detects a predetermined pressure or higher,
The operation of the pump may be stopped by, for example, cutting off the power to the pump.

In addition to this, it is also possible to indicate the stopped state of the pump by the lighting or blinking of an LED.

[Effects of the Invention] According to the above-mentioned J: Sea urchin, since the volume converting means whose volume changes depending on the water supply pressure is provided on the discharge side of the water supply means, the water supply pressure by the water supply pump is pulsatingly high. You can reduce what happens.

Therefore, even a small pump can maintain the required water supply capacity, and the device can be made smaller and lighter.

[Brief explanation of drawings]

FIGS. 1 to 5 relate to the first embodiment of the present invention.
The figure is a sectional view showing the structure of the elastic part in the first embodiment, Figure 2 is a perspective view showing the appearance of the first embodiment, Figure 3 is a bottom view showing the water supply system, and Figure 4 is the first embodiment. The vertical cross-sectional view of the example, FIG. 5 shows the water pump, and FIG.
b) is a side view, FIG. 6 is a sectional view showing essential parts in the second embodiment of the present invention, FIG. 7 is a sectional view showing the air chamber member, and FIG. 8 is a modification of the second embodiment. FIG. 1... Cauterization hemostasis device 3... Power supply device 6... Cauterization probe device 10... Cleaning water tank 13... Water pump 18.
... Waterway system 23 ... Pump device 45 ... Hard tube 46 ... Elastic part 47 ... Relief valve
51...Hard pipe 52...Soft tube 53
...Joint 54...Double presser member 71...Air chamber member

Claims (1)

[Scope of Claims] 1. In an ablation hemostasis device having a waterway system communicating with a liquid passage inside the ablation probe and comprising a liquid feeding means for supplying a cleaning liquid to the waterway system, the discharge side of the liquid feeding means A cautery hemostasis device characterized in that a waterway system is provided with a volume converter whose volume changes depending on pressure. 2. The cautery and hemostasis device according to claim 1, wherein the volume converter is formed of a soft tube, and a member for regulating radial deformation of the soft tube is provided on the outside thereof.