JP2576296Y2 - Circulating bladder aspirator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical aid in the field of urology, and is particularly suitable for aspirating fluid in the bladder (surgical perfusate) and separating suspended tissue during transurethral surgery. It is about equipment.

[0002]

2. Description of the Related Art Transurethral surgery in the field of urology includes prostatectomy, bladder tumor resection, and bladder lithotripsy.
Such surgery involves a tissue resection instrument with an endoscope inserted into the bladder through the urethra (resectosc
After the operation, the resected tissue pieces and the crushed stone pieces remain in the bladder. As a device for removing these residues, an Eric suction device E as shown in FIG. 4 is widely used.

In this suction device E, the upper half of a glass gourd-shaped container is used as a suction chamber 50, and a suction port 52 and a pump 56 composed of rubber balls are attached to the suction chamber 50.
Via a flexible connecting tube 56, it is detachably fitted to one end of a resection mirror outer tube K, which serves to guide a surgical instrument into and out of the bladder and to protect the urethra from the surgical instrument. It is configured to be. Then, in use, operate the pump 54 with a finger, and from the catheter tip,
The perfusion fluid for surgery in the bladder is sucked into the suction chamber 50 together with the finely crushed calculus pieces and tissue pieces, and in the suction chamber, these calculus pieces and tissue pieces are reduced by the small diameter portion 58 due to the difference in specific gravity.
Through the sedimentation chamber 60, which communicates with the suction chamber 50 via the airbag, and is used to separate these intravesical residues.

[0004]

[Problem] When the specific gravity difference between the liquid in the suction chamber 50 and the liquid in the suction chamber 50 is relatively large, such as a calculus piece, the Eric suction device E is settled into the precipitation chamber in a short time and separated. However, since the tissue piece has little difference in specific gravity, it takes time to settle from the suction chamber 50 into the sedimentation chamber, and the liquid separated from the tissue piece is pushed out by the pump,
At the time of reflux into the bladder, there are inconveniences such as the fact that the piece of tissue once in the sedimentation chamber is wound up by the liquid flow, returns to the suction chamber, and tends to re-enter the bladder, and the operation time is long. There was a disadvantage that it became.

[0005]

The object of the present invention is to solve the above-mentioned drawbacks of the prior art, and in transurethral surgery, a bladder aspirator capable of quickly removing tissue fragments and calculus fragments generated in the bladder during the operation. It is intended to disclose a vessel.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a suction flow path that can communicate with the surgical reflux liquid in the bladder through an outer tube of a resectoscope, and a liquid inlet to which this suction flow path is connected at one end. A separation chamber having a liquid outlet from the liquid inlet, a pump means for alternately applying pressure and suction to the liquid in the separation chamber, and a liquid outlet from the liquid inlet of the separation chamber. A filter member provided in a state of blocking a liquid flow path leading to the pump, a return flow path for connecting the liquid outlet and the suction flow path, a suction valve provided on an upstream side of the pump means, and the pump And a discharge valve provided downstream of the means.

In the bladder aspirator, the liquid that has entered the separation chamber from the suction channel through the suction valve by the pump operation returns to the bladder via the liquid outlet and the return channel, and is separated again. In the process of repeating being sucked into the room, in the process of repeating, along with the treatment, tissue fragments and calculus fragments mixed in the fluid in the bladder are captured and quickly by a filter member such as a filtration net provided in the separation chamber. It is characterized by being removed. Hereinafter, embodiments will be described in detail with reference to the drawings.

[0008]

Embodiment 1 FIGS. 1 and 2 show a first embodiment of a recirculating bladder suction device according to the present invention. In FIG. 1, a separation chamber 1 is fitted with an upper container 3 also made of tempered glass, with the opening edge 3a facing downward, on an upper opening edge 2a of a lower container 2 made of substantially cup-shaped tempered glass. Consisting of Reference numeral 4 denotes a rubber ring packing as a sealing member, which is interposed between the opening portions 2a and 3a of the containers 2 and 3.

The upper container 3 and the lower container 2 are fitted and fixed by a fastening fixture 5 while pressing the packing 4 from above and below to form the separation chamber 1. This fastening fixture 5 has bearings 5b, 5b on one side of a band 5a fixed along a recess provided on the outer periphery of the lower container, and has a circular After extending the locking ring 5c fixed to the bearing portion 5b toward the bearing portion 5b, the locking ring 5c has horizontal shafts 5d and 5d (see FIG. 2) which are bent in the horizontal direction. By supporting the portion 5b, the separation chamber 1 can open and close the upper and lower containers in a hinge-like manner, and by removing the horizontal axis from the bearing portion 5b, the upper and lower containers 2, 3 can be completely separated from each other. Become.

On the other hand, a lever piece 5e is pivotally supported by a band 5a on the side opposite to the bearing portion 5b, and the lever piece 5e is provided below the support shaft 5f of the lever piece 5e.
e, a ring-shaped hook 5g provided to penetrate
Lift the lever piece 5e upward, and move the locking ring 5c.
Part of which is provided so as to protrude from the peripheral surface of the upper container.
h, then the lever piece is pulled down as shown in FIG. 1 so that the upper container and the lower container are air- and liquid-tightly fitted and fixed. . Such a fastening fixture itself is known.

At the upper side of the separation chamber 1, a liquid inlet 3b is provided.
Is opened, and the suction valve 6 is fixed facing the inflow port 3b. The suction valve 6 is configured such that the upper part of a valve body 6a made of a material having flexibility and elasticity, such as a rubber piece or a soft plastic piece, is attached to a substantially ring-shaped valve seat 6b also serving as a fitting fixture. It is a check valve that is fixed and fitted facing the liquid inlet 3b, and passes only the liquid flowing from the liquid inlet 3b into the separation chamber 1.

Reference numeral 3c denotes a pump connection port opened on the side surface of the upper container. As shown in FIG. 2, the pump 10 composed of a rubber ball is connected to the connection port 3c formed of a tubular projection. At one end of the liquid inlet 3b, a suction pipe 7 as a suction flow path that can communicate with the inside of the bladder by being connected to the outer tube K of the resection mirror is fitted. The suction pipe 7
Is composed of a connecting pipe 7a made of a flexible pipe fitted at one end to the liquid inlet and a T-shaped pipe 7b fitted at the other end of the connecting pipe.

In the vicinity of the center of the separation chamber, a peripheral portion 12a of a net-like filter 12 is mounted as a filter member on a step 2b provided on the inner peripheral surface of the lower container. Crossing the separation room. The size of the mesh of the filtration network varies depending on the target to be captured, but in the case of a resected tissue piece, about 1 mm ² is sufficient.

A liquid outlet 2c is provided at the lower end of the lower container 2, and a discharge valve 8 is fitted into a valve chamber 2d provided facing the liquid outlet 2c. The discharge valve 8 is a check valve having exactly the same structure as the suction valve 6, and is mounted so as to pass only a liquid flow from the separation chamber to the liquid outlet side. The liquid outlet 2c is connected to a T-tube 7b of the suction pipe 7 by a return pipe 9 serving as a return flow path.

[0015]

The bladder aspirator according to the first embodiment having such a configuration is sterilized by a conventional method, and the tip of the suction tube 7 is connected to the resection mirror outer tube K from which the resection mirror has been removed. Is operated with a finger, the surgical reflux in the bladder flows into the separation chamber together with the resected tissue piece, and when passing through the filter 12, the tissue piece is filtered off and passed through the return tube 9. Return to the bladder. At this time, the return liquid remaining in the outer cylinder without reaching the bladder is again returned as it is by the next suction operation of the pump.
Although entering the separation chamber, if the pump discharge volume is sufficiently secured compared to the amount of return fluid remaining in the catheter, it can be ignored compared to the actual circulating fluid volume, and has almost no effect on the tissue removal efficiency Has no effect.

[0016]

Second Embodiment FIG. 3 shows a second embodiment of the present invention. Although the suction device according to the above-mentioned embodiment can withstand repeated use, in this case, it is suitable as a disposable type suction device. The separation chamber 20 includes an upper container 23 made of a soft plastic bellows-like container.
And a lower container 24 screwed into an external thread portion 23a engraved on the outer peripheral wall of the lower end opening of the container 23 at the upper end opening.
It is composed of The bellows-shaped container is easily deformed by the squeezing force applied from the diametric direction by the thumb and the forefinger, and quickly returns to its original shape except for the squeezing force.
An elastic wall having an appropriate restoring force is provided.

Reference numeral 26 denotes a filter net as a filter member which is locked to a step 25 provided at the base of the female screw portion 24a of the lower container 24. A peripheral edge 27 of the filter net 26 is made of an elastic material. By doing so, it also serves as a sealing material. By clamping the peripheral edge 26 between the step 25 and the lower end of the male screw 23a, the separation chamber is air- and liquid-tightly closed.

Reference numeral 28 denotes a suction valve attached to a liquid inlet opening on the upper side surface of the separation chamber 20, and 29 denotes a discharge valve provided at a liquid outlet opening on the lower side surface of the separation chamber.
8, one end of a suction pipe 30 composed of a T-shaped pipe is connected, and one end of a reflux pipe 31 is connected to the discharge valve 29. The other end of the reflux pipe 31 is connected to the T-shaped pipe 30. It consists of

[0019]

The method of operation is almost the same as that of the first embodiment. However, in the second embodiment, the bellows-shaped container forming the upper half of the separation chamber also serves as the pump means. The difference is that the volume of the chamber itself is changed to allow the fluid in the bladder to return. The tissue pieces and the like captured by the filtration net are opened and removed from the screw portion, and are subjected to a tissue test as necessary, as in the first embodiment.

In the above two embodiments, a flexible valve is used for both the suction valve and the discharge valve. However, it is needless to say that another known check valve can be used instead. It is also obvious that the filter member is appropriately selected depending on an object to be captured and removed, such as a wire net, a synthetic fiber net, and a woven fabric.

[0021]

The bladder aspirator of the present invention uses the two check valves to transfer the liquid in the bladder from the suction channel through the separation chamber and the reflux channel,
It is a circulating flow returning to the bladder in a certain direction, and a filter interposed in this circulating flow path is used to remove tissue pieces and calculus pieces, so that these can be removed in an extremely short time. In addition, the operation time can be greatly reduced.

Particularly, in prostatectomy, which is the most frequent transurethral operation, venous bleeding cannot be completely stopped, so the operation time and the amount of bleeding are almost in proportion. The use of a device can greatly reduce the amount of bleeding, which in turn leads to a significant reduction in the occurrence of surgical complications.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of the present invention.

FIG. 2 is an explanatory view of the embodiment of FIG. 1 as seen from a plane direction.

FIG. 3 is an explanatory view showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example of a conventional technique.

[Explanation of symbols]

 1,20 Separation chamber 6,28 Suction valve 8,29 Discharge valve 4 Packing 10 Pump 12,26 Filter 7,30 Suction pipe 9,31 Reflux pipe

Claims (3)

(57) [Scope of request for utility model registration] 1. A separation chamber having a liquid inlet and a liquid outlet, a suction path for surgical reflux connected at one end to the liquid inlet, and a liquid in the separation chamber which is alternately pressurized and pressurized. Pump means for sucking, a filter member provided to shut off a liquid flow path from a liquid inlet to a liquid outlet of the separation chamber, and a reflux flow path for connecting the liquid outlet and the suction flow path And a suction valve provided upstream of the pump means and a discharge valve provided downstream of the pump means. 2. The circulating bladder suction device according to claim 1, wherein a part or the whole of the separation chamber is constituted by an elastic wall having a shape restoring force, so that the separation chamber also serves as a pump means. 3. The circulating bladder suction device according to claim 1, wherein the separation chamber is configured to be dividable.