JPH0111258Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an indwelling catheter that is inserted endoscopically into a bile duct and left there.

If the distal end of the bile duct is narrowed, resulting in jaundice due to bile accumulation or worsening of the general condition, especially in high-risk patients who cannot tolerate surgery, such as the elderly, a catheter may be inserted into the bile duct endoscopically. Treatments include draining bile and injecting medical solutions and contrast agents for X-ray photography using this catheter. The catheter is composed of a flexible tube body and a cap that is detachably fitted to the proximal end of the tube body, and a syringe is connected to the cap to inject a drug solution or a contrast medium. When the prescribed treatment is completed, the cap is removed from the proximal end of the tube body and only the endoscope is withdrawn from the body cavity, the tube body is left in place, and bile is intermittently discharged.

By the way, the connection between the tube body and the cap is relatively strong so that no leakage occurs from these connecting parts, and the proximal end surface of the tube body a is in close contact with the cap b as shown in Fig. 1. However, there is no gap between them. Therefore, even if you hold the tube body a with one hand and pull the cap b with the other hand to remove the cap b,
Since the surface of the tube body a was slippery, the cap b could not be easily removed. Also, if you try to pull out the cap b by forcing your nail between the end surface of the tube body a and the joint surface of the cap b, a deformed part c will occur at the base end of the tube body a, as shown in Figure 2. It ends up. Then, when only the endoscope is pulled out, the deformed portion c gets caught in the forceps channel of the endoscope, so that the tube body a may also be pulled out together with the endoscope.

This idea was made based on the above circumstances,
The purpose is to provide an indwelling catheter in which a base fitted to the proximal end of a tube body can be easily removed without applying excessive force to the tube body to deform it. It is in.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. In the figure, 1 is a tube body formed of a flexible elastic body. A notch 2 is formed in the base portion of the tube body 1 as an exposed portion by cutting out a part of the peripheral wall so as to be inclined in the axial direction toward the end surface. A cap 3 is removably fitted into the base end of the tube body 1. The mouthpiece 3 has an opening 5 at one end of the base 4 through which a syringe can be attached and removed, and a stopper part 6 and a connecting part 7 having a smaller diameter than the stopper part 6 formed in sequence at the other end. There is. and,
The proximal end portion of the tube body 1 is fitted and connected to the connecting portion 7 of the base 3 with its end surface abutting the end surface 6a of the stopper portion 6.

The tube body 1 of the indwelling catheter configured in this manner is inserted into a forceps channel of an endoscope (not shown), and introduced into a body cavity together with the endoscope. After performing treatments such as draining bile and injecting liquid medicine and contrast medium, the cap 3 is removed from the tube body 1, only the endoscope is removed from the body cavity, and the tube body 1 is left in place. Continuously discharge.

By the way, when removing the cap 3 from the tube body 1, there is a notch 2 at the base end of the tube body 1.
is formed, and a cross section 2a of this notch 2 is exposed to the outside. Therefore, if the cap 3 is pulled by hooking a nail or the tip of a tweezers on the cross section 2a of the notch 2 as shown in FIG.
The cap 3 can be easily removed without deforming the base end portion of the tube body 1. That is, the cap 3 can be removed from the tube body 1 using the cross section 2a of the notch 2 without forcibly deforming the proximal end of the tube body 1.

In addition, in the present invention, as shown in FIG. 6, a stepped portion 11 is formed in the stopper portion 6 of the cap 3 by removing a part of the peripheral wall of the stopper portion 6 in the radial direction, and this stepped portion 11 is exposed. According to such a configuration, the tube body 1 corresponding to the stepped portion 11 may be
Since the end surface 1a, which is the cross section of the tube, is exposed to the outside, the cap 3 can be easily removed from the tube body 1 using this end surface 1a, as in the above embodiment.

As described above, in an indwelling catheter in which a cap is removably fitted to the proximal end of a tube body, when at least a part of the end surface of the tube body abuts the stopper portion of the cap, the tube An exposed portion is formed in which a part of the cross section of the main body is exposed. Therefore, by hooking a nail or the tip of a tweezers onto the end surface of this exposed portion, the cap can be easily removed from the tube body without forcibly deforming the proximal end of the tube body.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a conventional connection structure between the tube body and the cap, Fig. 2 is an explanatory diagram showing a state in which a deformed portion has occurred at the proximal end of the tube body, and Fig. 3 is an embodiment of the present invention. FIG. 4 is an enlarged view of the connection between the tube body and the base, FIG. 5 is a perspective view of the proximal end of the tube body, and FIG. 6 is a diagram showing another embodiment of the present invention. It is an enlarged view of the connection part of the tube main body and a cap|cap|cap which are shown. 1...Tube body, 2...Notch part (exposed part),
3...Cap, 11...Stepped part (exposed part).

Claims (1)

[Scope of utility model registration request] In an indwelling tube in which a cap is removably fitted to the proximal end of a flexible tube body, when at least a part of the end surface of the tube body abuts the stopper portion of the cap, the cross section of the tube body An indwelling catheter characterized by forming an exposed portion through which a portion of the catheter is exposed.