JP5046759B2 - Endoscopic body fluid collection catheter and body fluid collection endoscope system - Google Patents

Description

  The present invention relates to a catheter for collecting body fluid using an endoscope and an endoscope system for collecting body fluid.

For example, in order to detect the presence or absence of a lesion, a body fluid (for example, bile) at a specific site in a body cavity is conventionally collected. It was common to collect via a suction channel. Patent Document 1 proposes a sample collection tube that is used by being inserted into a forceps channel of an endoscope.
JP-A-11-309149

  However, the former is suitable for sucking a large amount of a foreign substance (liquid) in a body cavity, but it is not suitable for collecting a small amount of body fluid at a specific site and is difficult to collect. In the latter case, when collecting, it is necessary to connect a suction device to the protruding portion of the proximal end of the forceps channel of the sample collecting tube, which is not convenient.

  Accordingly, an object of the present invention is to provide a body fluid collecting catheter and an endoscope body fluid collecting system that can be used in combination with an endoscope and can easily collect a small amount of body fluid.

  The bodily fluid collection catheter used by being inserted into the forceps channel of the endoscope of the present invention is composed of a single synthetic resin material as a whole, and the tube body having a suction opening at the distal end thereof, It has a large-diameter bag-like tail and is closed except for the suction opening at the tip, and when the suction opening at the tip protrudes from the tip of the forceps channel, the bag-like tail at the rear end is the rear end of the forceps channel It has the feature of having a length protruding from the portion.

  Further, according to the aspect of the bodily fluid collecting endoscope system including the endoscope having the forceps channel and the synthetic resin bodily fluid collecting catheter used by being inserted into the forceps channel, the bodily fluid collecting catheter is provided at the distal end portion. The rear end portion of the tube body having the suction opening has a bag-like tail portion having a diameter larger than that of the tube body, and the body fluid collection catheter and the forceps channel are closed except for the suction opening of the distal end portion. When the suction opening at the distal end of the body fluid collection catheter projects from the forceps channel distal end, the bag-like tail at the rear end has a length projecting from the rear end of the forceps channel.

  The bag-like tail at the rear end of the body fluid collection catheter is preferably thinner than the tube body.

  Moreover, it is preferable that the suction opening of a front-end | tip part is made into a smaller diameter than the back tube body.

  Specifically, the synthetic resin material is preferably a tetrafluoroethylene resin.

  According to the present invention, a bodily fluid collection catheter is inserted into an endoscopic forceps channel, and the bag-like tail portion protruding from the proximal end of the forceps channel is gripped and then separated from the distal end portion of the forceps channel. A small amount of body fluid can be easily collected from the suction opening at the tip.

  FIG. 1 shows an example of an endoscope 10 to which the present invention is applied. The endoscope 10 includes an operation unit 11 that is gripped by an operator and an insertion unit 12 that extends from the operation unit 11. The distal end portion of the insertion portion 12 is a bending portion 12 a that is bent in the vertical and horizontal directions in accordance with the operation of the bending operation device 13 provided in the operation portion 11.

  A universal tube 14 extends from the operation unit 11, and a connector 15 connected to a video processor (not shown) is provided at the tip of the universal tube 14. In the universal tube 14, a CCD cable (not shown) and a light guide (not shown) are provided.

  A forceps channel 16 is inserted into the insertion portion 12. As shown in FIG. 2, the distal end portion of the forceps channel 16 is opened as a forceps protrusion 16a in the distal bending portion 12a of the operation portion 12, and the rear end portion is opened as a forceps insertion port 16b in the operation portion 11. ing. The forceps channel 16 is made of a low-friction synthetic resin material, preferably tetrafluoroethylene resin, and can smoothly project forceps inserted from the forceps insertion opening 16b from the forceps protrusion 16a.

  An objective lens 17 and an illumination lens 18 are also provided at the distal end surface of the curved portion 12a, and illumination light is sent to the illumination lens 18 from a video processor connected to the connector 15 via a light guide. An image obtained through the objective lens 17 is sent to a video processor connected to the connector 15 via a CCD cable, and is displayed as an image on a monitor (not shown) connected to the video processor. The state of the forceps and the like protruding from the forceps protrusion 16a is observed through the monitor.

  The bodily fluid collection catheter 20 of the present embodiment is used by being inserted into the forceps channel 16 of the endoscope 10 as described above, and its single shape is shown in FIG. The body fluid collection catheter 20 is made of a flexible synthetic resin material, preferably a tetrafluoroethylene resin material, and is attached to the distal end of a tube body 21 having a uniform thickness that can be inserted into and removed from the forceps channel 16. It has a small-diameter tapered suction opening 22 that narrows down the body 21, and has a bag-like tail portion 23 that is larger in diameter than the tube body 21 (forceps channel 16) at the rear end. The bag-like tail portion 23 has flexibility to make a small diameter (small volume) by gripping from a free state, and resilience to restore the original shape when the gripping force is released. In order to give such a property, the film thickness t of the bag-like tail portion 23 is formed thinner than the film thickness T of the tube body 21 (T> t). Further, the outer diameter d of the tube body 21 is about 1.8 to 2.2 mm, and the outer diameter D of the bag-like tail portion 23 is about 5.0 to 10.0 mm, which is larger than the inner diameter of the forceps channel.

  The body fluid collection catheter 20 is closed except for the suction opening 22, and when the bag-like tail 23 is gripped, the air in the tube body 21 is discharged from the tip of the suction opening 22, and then the bag-like tail 23 is removed. When released, air (liquid) is sucked into the tube body 21 from the suction opening 22 by the restoring force of the bag-like tail portion 23.

  The body fluid collection catheter 20 has such a length that the bag-like tail portion 23 projects from the forceps insertion port 16b when the suction opening 22 is projected from the forceps projection port 16a of the forceps channel 16 (FIG. 4). .

  The above body fluid collection catheter 20 collects body fluid using the forceps channel 16 of the endoscope 10 as follows. The insertion portion 12 of the endoscope 10 is inserted into the body cavity of the subject, and an image obtained through the objective lens 17 is observed on the monitor in the presence of illumination light from the illumination lens 18 according to a conventional method. When the distal end of the insertion portion 12 reaches the target site, the tube body 21 of the body fluid collection catheter 20 is inserted from the forceps insertion port 16b on the hand (operation portion 11) side of the forceps channel 16, and the suction opening 22 is inserted. It is made to project from the forceps projecting port 16a opened in the part 12. At this time, the bag-like tail portion 23 is located outside the forceps insertion opening 16b. The protruding state (position and protruding amount) of the forceps protruding port 16a can be observed with a monitor.

  After confirming that the suction opening 22 is close to the target body fluid collection site and gripping the bag-like tail 23 slightly, when the bag is opened, an amount of body fluid corresponding to the gripped amount is collected in the tube body 21. can do. Thereafter, the whole body fluid collection catheter 20 is pulled out from the forceps channel 16, the suction opening 22 is applied to the collection container, and the bag-like tail portion 23 is grasped, whereby the body fluid necessary for the collection container can be taken out. By forming the tapered suction opening 22 with a diameter smaller than that of the tube body 21, it is possible to prevent the collected body fluid from easily falling off the tube body 21.

  The endoscope 10 of the above embodiment is an example, and the present invention can be applied to an endoscope having a forceps channel 16 in general.

It is a top view which shows an example of the endoscope which applies the bodily fluid collection | recovery catheter by this invention. It is a perspective view of the endoscope front-end | tip part. It is a perspective view of a bodily fluid collection catheter alone according to the present invention. It is a conceptual diagram which shows the state which inserted the bodily fluid collection catheter by this invention into the forceps channel of an endoscope.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Endoscope 11 Operation part 12 Insertion part 12a Bending part 13 Bending operation apparatus 14 Universal tube 15 Connector 16 Forceps channel 16a Forceps protrusion port 16b Forceps insertion port 20 Body fluid collection catheter 21 Tube body 22 Suction opening 23 Bag-like tail

Claims (8)

A bodily fluid collection catheter used by being inserted into a forceps channel of an endoscope,
The whole consists of a single synthetic resin material,
The rear end of the tube body having a suction opening at the front end has a bag-like tail that is larger in diameter than the tube body and is closed except for the suction opening at the front end, and the suction opening at the front end is a forceps When protruding from the front end of the channel, the bag-like tail at the rear end has a length protruding from the rear end of the forceps channel;
A body fluid collecting catheter for endoscope. 2. The endoscope body fluid collecting catheter according to claim 1, wherein the bag-like tail portion at the rear end is thinner than the tube body portion. The endoscope body fluid collecting catheter according to claim 1 or 2, wherein the suction opening at the distal end is smaller in diameter than the tube body behind the suction opening. 4. The endoscope body fluid collecting catheter according to claim 1, wherein the endoscope body fluid collecting catheter is made of a tetrafluoroethylene resin. A body fluid collection endoscope system comprising an endoscope having a forceps channel and a body fluid collection catheter made of a synthetic resin that is inserted into the forceps channel and used.
The bodily fluid collection catheter has a bag-like tail portion having a diameter larger than that of the tube body at the rear end portion of the tube body having a suction opening at the tip portion, and is closed except for the suction opening at the tip portion; and The body fluid collection catheter and the forceps channel have a length such that when the suction opening at the distal end of the body fluid collection catheter protrudes from the forceps channel distal end, the bag-like tail at the rear end projects from the rear end of the forceps channel;
Body fluid collection endoscope system characterized by 6. The body fluid collecting endoscope system according to claim 5, wherein the bag-like tail portion at the rear end of the body fluid collecting catheter is thinner than the tube body portion. The body fluid collection endoscope system according to claim 5 or 6, wherein the suction opening at the distal end of the body fluid collection catheter has a smaller diameter than the tube body behind the suction opening. The body fluid collection endoscope system according to any one of claims 5 to 7, wherein the body fluid collection catheter is made of tetrafluoroethylene resin.

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