JPH0454970A - Medical treatment device - Google Patents

Abstract

PURPOSE:To prevent buckling from occurring with easier inserting operation into a guide tube by a method wherein an inserting section is provided to be introduced into a celom through an induction guide tube while a connectable connection is arranged at a based end of the induction guide tube and an anti-reversion member is mounted at a portion with the length almost equal to an overall length of the induction guide tube from the tip at the inserting section to keep the induction guide tube liquid-tight and a airtight inside. CONSTITUTION:A forceps plug 16 has a connection 22 with a shape suited to be mounted and solidified on a cap of a forceps insertion port 10 and a check valve 24 is formed at the center thereof. A tip of a catheter body 14 is inserted into a channel 4 through a forceps inserting port 10 of an endoscope and the forceps plug 16 is mounted at the forceps inserting port 10. The tip of the catheter is inserted into a position almost equal to the tip of an endoscope inserting section to be kept airtight and liquid tight with the inside of the channel 4. When the tip of the catheter gets close to a desired part, a tube 18 is forced to slide through round holes 26 and 28 and a slit 30 of the forceps plug and protrudes toward the tip of the endoscope. This allows the catheter to be introduced to the desired part without being buckled and a necessary treatment can be carried out.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to medical treatment instruments such as medical catheters.

[Background Art] In recent years, catheters have been widely used as a type of medical treatment tool to be inserted into body cavities to inject drugs or to suction and collect body fluids. This type of catheter can be inserted into a body cavity alone as shown in Japanese Patent Application Laid-Open No. 1-113073, or can be inserted into a guide tube such as an endoscope channel or a guide tube to guide the body cavity. It is often introduced into the target area.

On the other hand, the proximal end of these guide tubes, which are not inserted into the body, is used to introduce CO2 gas into the body cavity through the guide tube, for example, as shown in Figure 4, or to leak body fluids or perfusion liquids to the outside. In order to prevent this, a backflow prevention valve called a forceps plug is provided. This forceps plug is made of an elastic material such as rubber, and has a slit in its center for liquid-tightly and air-tightly inserting the catheter to be inserted, and an ultra-thin diameter smaller than the outer diameter of the catheter to be inserted. There are holes etc.

[Problems to be Solved by the Invention] When inserting a catheter into a guiding tube having a forceps plug as described above, it is necessary to guide the catheter while resisting frictional resistance such as the slit or round hole of the forceps plug. It is necessary to keep pushing the catheter into the tube, and by the time the tip of the catheter protrudes beyond the tip of the guiding tube and reaches the target site in the body cavity,
It is necessary to repeat the catheter pushing operation many times. Therefore, there is a problem that the operation is not only frequent, but also that the catheter may buckle during the pushing operation.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide medical treatment instruments such as catheters that are airtightly and liquid-tightly disposed within a guide tube inserted into a body cavity. It is an object of the present invention to provide a medical treatment tool that can be easily inserted and does not buckle.

[Means for Solving the Problems and Effects] The objects of the present invention are achieved by the following means.

That is, the medical treatment instrument as the means includes an insertion section that is introduced into the body cavity through the guide tube, has a connecting section connectable to the proximal end of the guide tube, and has a connecting section that can be connected to the proximal end of the guide tube. A backflow prevention member that maintains a liquid-tight and air-tight state is attached to a portion of the insertion portion having a length approximately equal to the entire length of the guide tube from the distal end thereof.

Therefore, there is no need to insert the treatment instrument through the slit of the backflow prevention member, and buckling of the treatment instrument insertion portion during insertion is prevented.

[Embodiments] Examples of the present invention will be described below with reference to the drawings.

FIG. 2 shows the endoscope 2 inserted into a body cavity. The channel 4 of the endoscope 2 is used as a guide tube for inserting a catheter, and has an opening provided at the distal end of an insertion section 6 inserted into a body cavity, and an operation section 8 of the endoscope.
It communicates with the forceps insertion port (proximal end of the guide tube) 10. The forceps insertion port 10 is formed in a Luer lock shape so that various adapters and syringes (not shown) can be connected and fixed thereto.

FIG. 1 shows a catheter 12 as a medical treatment instrument according to a first embodiment of the present invention. This catheter 12
is composed of a catheter body 14 and a forceps plug 16 as a backflow prevention member, and the catheter body 14 is made of PTFE.
, a flexible tube 18 made of synthetic resin such as FEP, and a cap 20. The cap 20 is fixed to the rear end of the flexible tube 18 and is a luer lock suitable for connecting the caps of syringes and various medical tubes. It is formed in the shape of Note that the flexible tube 18 constitutes an insertion portion of the catheter 12.

The forceps plug 16 is made of a medical elastic material such as silicone, and has a connecting portion 22 having a shape suitable for being attached and fixed to the cap of the forceps insertion port 10 in a liquid-tight manner. The connecting portion 22 has a groove shape that is slightly smaller than the corresponding dimensions of the forceps insertion port 10. Further, a cylindrical check valve 24 is formed in the center of the forceps plug 16. This check valve 24 has a first round hole 26, a second round hole 28, and a slit 30 formed at its center, through which the tube 18 of the catheter body 14 is inserted, and is liquid-tight. Maintains integrity and airtightness.

The first round hole 26 has an inner diameter larger than the outer diameter of the tube 18 to be inserted, and its outer open end is connected to the tube 18.
8 is formed in a tapered shape that widens outward. The second round hole 28 is connected to the tube 1
8, and maintains liquid tightness and airtightness within the channel 4 while elastically compressing the outer peripheral surface of the tube 18. In addition, the distal end side of the second round hole 28 is also formed in a tapered shape toward the outside, making it easy to introduce an insertion aid such as a guide wire that is pre-loaded into the channel of the endoscope when used for other purposes. At the same time, the opening end of the round hole is prevented from becoming entangled as the tube 18 moves forward and backward.

Further, the slit 30 is formed in the first and second round holes 26.
It is provided between 28. Slit 30 shown in FIG.
The slits 30 are expanded when the tube 18 is inserted, but when the tube is removed, the slits 30 are closed to prevent the liquid and gas inside the channels 4 from leaking to the outside. Further, an annular groove 32 is provided between the slit 30 and the second round hole 28 and has a tapered portion that expands from the inner diameter of the second round hole 28 to the inner diameter of the first round hole 26. .

The forceps plug 16 is attached in advance to the middle part of the tube 18, and the length L from the tube tip to the attachment position is
2 is positioned to be approximately equal to the total length L1 of the channel 4 of the endoscope.

When using the catheter configured as described above, the tip of the catheter body 14 is inserted into the channel 4 through the forceps insertion port 10 of the endoscope, and the forceps plug 16 is attached to the forceps insertion port 10. As a result, the tip of the catheter is inserted to a position approximately equal to the tip of the endoscope insertion portion, and the catheter is held in the channel 4 in a liquid-tight and air-tight state. When bringing the tip of the catheter closer to the target site, the tube 18
By pushing in, the tube 18 slides through the first and second round holes 26, 28 and the slit 30 of the forceps plug, and projects toward the distal end of the endoscope while maintaining a liquid-tight state. Therefore, the catheter can be introduced to the target site without buckling, and the necessary treatment can be performed using this catheter.

FIG. 3 shows a catheter 38 for intra-fallopian artificial insemination according to a second embodiment of the present invention. This catheter 38
The catheter main body 14 and the forceps plug 1 are the same as in the first embodiment.
In addition to 6, an air supply branch body 40 is further provided. Here, since the catheter main body 14 and the forceps plug 16 have the same configuration as in the first embodiment, their explanation will be omitted.

As shown in FIG. 3, the branch body 40 has a tube 18 inside.
A lumen 42 through which the lumen is inserted, and a lumen branching from the middle of the lumen 42,
The air supply pipe 46 opens to the side air supply cap 44. A cap 49 corresponding to the shape of the connecting portion of the forceps plug 16 is provided at the rear end of the lumen 42, and the forceps plug 16 can be attached and fixed in an airtight manner. Further, the air supply cap 44 is formed in a Luer lock shape, and can be easily connected to a syringe or a cap of an air supply tube for supplying gas into the guiding tube for securing the field of view.

On the other hand, the distal end portion 48 of the branch body 40 is formed in a shape that can be connected to the proximal mouthpiece provided at the proximal end of the guide tube, so that the channel of the endoscope can be connected to the guide tube as in the first embodiment. When used as a tapered part of a syringe, it is formed in the same shape as the tapered part of a syringe.

The attachment position of the branch body 40 to the catheter body is the first
As in the embodiment, the catheter is positioned at a position where the length from the tip is slightly longer than the entire length of the guide tube.

The catheter 38, with the forceps plug 16 and the branch body 40 attached thereto, is sealed in a sterile pack and stored in a sterile state until just before use.

Next, the handling when using the catheter according to the second embodiment in combination with an endoscope will be explained.

First, the operator takes out the catheter 38 from the sterile bag and inserts it into the endoscope channel before inserting it into the body cavity. When the distal end portion 48 of the branch body 40 is connected and fixed to the forceps insertion port 10, the distal end of the catheter body 14 is placed in a state that slightly protrudes from the distal end of the endoscope.

In this state, the tip of the catheter is inserted into the container containing semen, and the semen is sucked into the tube 18 using a syringe (not shown) connected to the mouthpiece 20.

When an air feeding tube for feeding gas for securing the field of view is connected to the air feeding mouthpiece 44, the gas is released from the tip of the endoscope through the gap between the channel and the tube of the catheter. The operator inserts an endoscope into the uterus, expands the uterine cavity with this gas, inserts the tip of the catheter into the fallopian tube ostium, and injects semen into the fallopian tube by pressing the syringe.

Therefore, in this second embodiment as well, the catheter can be introduced to the target site without buckling, and the necessary treatment can be performed with this catheter.

[Effects of the Invention] As explained above, in the present invention, the backflow prevention member is attached in advance to the middle part of the insertion part of the medical treatment instrument depending on the length of the guide tube used in combination. Therefore, the operator can easily insert and arrange the treatment instrument. Furthermore, since there is no need to push the long treatment instrument against the frictional resistance of the backflow prevention member, the treatment instrument will not be damaged or buckled.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a medical catheter according to a first embodiment of the present invention, FIG. 2 is a partial cross-sectional view of an endoscope equipped with a channel used as a guiding tube, and FIG. 3 is a partial cross-sectional view of a medical catheter according to a first embodiment of the present invention. A partial cross-sectional view of a medical catheter according to a second embodiment of
FIG. 4 is a partial sectional view showing a conventional forceps plug attached to the forceps port of an endoscope. 4... Channel (guide guide tube), 10... Forceps insertion port, 16... Forceps plug (backflow prevention member) 18... Soft tube, 22... Connection portion.

Claims (1)

[Claims] A medical treatment instrument equipped with an insertion section that is introduced into a body cavity through a guide tube, which has a connecting section connectable to the proximal end of the guide tube to make the inside of the guide tube liquid-tight and airtight. A medical treatment instrument characterized in that a backflow prevention member to be held is attached to a portion of the insertion portion having a length approximately equal to the entire length of the guide tube from the tip thereof.