JPH07108319B2 - Catheter for intestinal insertion - Google Patents

Description

TECHNICAL FIELD The present invention relates to a catheter for insertion into the intestinal tract, which is used for diagnosis and treatment by intranasally inserting into the intestine in a case associated with intestinal obstruction.

[Conventional technology]

When diagnosing or treating intestinal obstruction, a catheter is transnasally inserted from the esophagus into the intestine through the gluteal tract, and the intestinal contents are expelled or the intestinal tract is decompressed to reduce the internal load. Is often used.

In the conventional catheter structure used for such an application, as shown in FIG. 3 (a), a weight composed of a plurality of metal balls 1 that facilitates insertion of the catheter at the distal end portion is flexible in a beaded shape. A guide portion 2 embedded in a resin is installed, and a plurality of suction holes 4 and a balloon 5 which is inflated by fluid injection are provided in a tube body 3.

The tube body 3 usually has two to three conduits (lumens), and basically, the inflation fluid is provided in the main lumen and the balloon 5 which are passages for discharging the contents of the intestine outside the body. And a sublumen for injecting. In addition, another sub-lumen that serves as an air introduction passage for improving suction efficiency and preventing excessive suction on the intestinal wall may be attached.

The insertion of the catheter into the intestinal tract is performed with the guide wire inserted into the thin tube of the tube body 3, and the intestinal contents are sucked and discharged through the suction hole 4 of the tube body 3 through the main routine. It is discharged to the outside of the body via the connector 6 installed at the proximal end of the catheter.

The balloon 5 functions to advance the catheter to the obstruction of the intestine by the peristaltic movement of the intestine after passing through the pylorus.

The catheter is usually made of a resin material such as soft polyvinyl chloride or silicone rubber, and the guide portion 2 and the tube body 3 are formed by adhering resin of the same material or by integral molding. When soft polyvinyl chloride resin is used as the constituent material, the guide wire can be inserted easily, but since the guide part 2 is relatively hard, it is not possible to flexibly follow the bend in the intestinal tract, making intubation difficult. There is a risk of damaging the inner wall of the extremely fragile bowel obstruction and causing perforation.

On the other hand, in the case of silicone rubber, since the guide portion 2 is extremely flexible, the problem of damaging the intestinal wall as described above does not occur, but the tube body portion is not stiff,
In addition, there is a problem in terms of characteristics that the material does not slide well. For this reason, it may be difficult to insert the guide wire into the tube main body (main lumen), or the catheter inserted into the body may have a spiral shape in the antrum and make it difficult to pass the pylorus. is there.

As a solution to such a problem that the tube body 3 is not stiff, as shown in FIG. 3 (b), an axial through hole 7 that opens at the tip end is provided in the continuous portion of the spherical weight in the guide portion 2, As shown in FIG. 3 (c), a catheter having a structure in which metal rings 8 are arranged around the guide portion 2 provided with an axial through hole 7 at a predetermined interval has been proposed (actual exploitation 64-64). 19449 publication).

[Problems to be Solved by the Invention]

The type of catheter that opens at the tip through the through hole is often used as a structure for penetrating a guide wire or draining body fluid. The site is not sufficient in terms of flexibility, flexibility, and resilience, which makes it difficult for the pylorus ring to communicate smoothly without the help of a guide wire, and also to follow the inside of the bowel that bends. However, there is a problem that it is not possible to respond flexibly. Furthermore, the intubation of a catheter using a guide wire is
Only the guide wire is previously inserted through the nasal passage, oropharynx and stomach of the patient from the pylorus to the duodenum, and then the axial through hole 7 of the catheter guide portion 2 is inserted from the proximal end portion of the guide wire to the guide wire. Since the method of inserting the tube body 3 of the catheter into a predetermined position inside the body is adopted, there is a risk that the inner wall of the intestinal tract may be damaged by the guide wire protruding from the distal end in the process of guiding the tube body 3 to the predetermined position inside the body. .

The object of the present invention is to solve the above problems of the conventional structure, and the tip portion has excellent flexibility, flexibility and resilience in a well-balanced manner, and smooth body intubation, safe and detailed An object of the present invention is to provide a catheter for insertion into the intestinal tract that has a mechanism capable of performing operations.

[Means for Solving the Problems]

A catheter for insertion into the intestinal tract according to the present invention for achieving the above object is provided with a guide portion made of a flexible tube and a fluid inflatable balloon at a distal end portion thereof, and a plurality of suction holes are provided on front and rear tube surfaces of the balloon. A catheter structure in which a provided tube body and a subroutine for inflating a balloon extend to a side wall of the tube body and the subroutine and the main routine of the tube body are connected to a thin tube provided with a connector at a proximal end thereof. A spiral elastic body is provided inside the guide portion so as to form an inner hole continuous with the main routine, and ring-shaped weight bodies for fixing the spiral elastic body are provided at both ends of the spiral elastic body. It is characterized in that it is provided and a tip member is integrally installed at the tip.

Similar to the conventional structure, the tube body is a member that constitutes the main lumen that discharges the contents from the intestine to the outside of the body, and is made of a resin material such as soft polyvinyl chloride resin, urethane resin, polyamide resin, polyester resin, etc. It is formed. Further, it is preferable that the tube of the guide portion in which the spiral elastic body is provided is formed of a flexible resin such as silicone rubber, urethane resin, natural rubber latex resin, but is not limited to these materials. .

The spiral elastic body is preferably formed of a metal material so as to have the function of a weight that facilitates insertion, and the flexibility is formed as one series or a plurality of concentric circles in the flexible resin tube of the guiding portion. It is internally provided without being fixed to the inner wall of the resin tube, and both ends thereof are fixed by ring-shaped weights. The ring-shaped weight bodies provided at both ends of the spiral elastic body are also made of a heavy metal material.

The tip member installed at the tip of the guide portion can be designed to have a structure having a through hole communicating with the spiral elasticity and the inner hole, or a sealing structure without the through hole.

[Work]

The catheter for insertion into the intestinal tract according to the present invention having the above-described configuration has excellent flexibility, flexibility and restorability in a well-balanced manner because the guide portion is made of a flexible resin tube having a spiral elastic body provided therein. It has a structure. Therefore, when the sealing tip member is installed at the tip, the intubation operation into the body can be smoothly progressed without using the guide wire. In addition, in the structure in which the through hole that communicates with the inner hole of the spiral elastic body is bored in the tip member, the guide wire can be inserted up to the tip apex of the catheter. It is possible to freely operate the section. In this case, since the flexibility of the guide part is extremely good,
The risk of damaging the intestinal wall with the tip of the guide wire during the insertion process is avoided.

With such a function, intubation of the pylorus which is difficult to pass can be advanced extremely smoothly, and the intestinal tract having many soft bends can be reasonably followed and set at a predetermined position.

By the above-mentioned action, it is guaranteed that the detailed diagnostic operation is always performed safely and the treatment such as discharge of intestinal contents and release of blockage is efficiently performed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same members as those in FIG. 3 are designated by the same reference numerals.

FIG. 1 is a partially cutaway sectional view showing the entire intestinal tract insertion catheter according to the present invention, in which 2 is a guide portion, 3 is a tube body, 4 is a suction hole, and 5 is a balloon.

The tube body 3 has a main lumen 9 serving as a passage for discharging the intestinal contents, which is connected to the connector 6 at the base end portion, as in the case of the conventional catheter. An air-introducing subroutine 11 is provided to improve the suction effect of the lumen 10 or the suction hole 4 and to prevent excessive suction pressure.

Further, an X-ray opaque line can be installed in the tube body 3 or an X-ray opaque agent can be kneaded therein.

An inner hole communicating with the main lumen 9 is formed in the tube of the guiding portion 2, and a spiral elastic body 12 is provided inside the tube so as not to be fixed to the inner wall of the tube. 13 is interposed to fix the spiral elastic body 12. Then, the tip member 14 is integrally installed at the tip of the guiding portion 2.

FIG. 2 is an enlarged cross-sectional view of the distal end portion of the catheter. Of these, (a) is a structural mode in which the spiral elastic body 12 is internally provided as a series inside the covering tube 15 of the guiding portion 2, and the inner hole 16 in this case is directly formed by the spiral elastic body 12. Or a tube-shaped object 17 installed separately
Is formed through. The tip member 14 at the tip is integrally formed with the covering tube 15, and has an opening structure in which a through hole 18 penetrating the inner hole 16 of the spiral elastic body 12 is formed in the axial direction. This structure is particularly advantageous when a guide wire is also used when passing through the pylorus.

The embodiment shown in FIG. 2 (b) has a structure in which two series of spiral elastic bodies are concentrically provided inside the covering tube 15 of the guiding portion 2, and the spiral elastic body 12 having a relatively large pitch is provided outside.
Is installed, and spiral elastic bodies 12 'having a fine pitch are doubly installed on the inner surface of the concentric circle. The inner hole in this case is formed by the spiral elastic body 12 'on the inner side, but the chip member 14 has a sealing structure without through holes. In the structure of (b), since a plurality of series of spiral elastic bodies are internally provided, the effect of improving the balance of flexibility, flexibility and resilience is great, so that it is possible to easily pass through the pylorus without guiding a guide wire. Therefore, it is possible to smoothly intubate while following the bend in the intestinal tract.

〔The invention's effect〕

As described above, the catheter for intestinal tract insertion according to the present invention has a structure in which excellent flexibility, flexibility, and resilience are imparted to the distal end portion. Therefore, when used, a guide wire may be used in combination if necessary. Thus, it is possible to smoothly proceed through the pylorus, which is difficult to operate, and it is possible to intubate a bent intestinal tract without resistance.

Therefore, it becomes possible to always safely and smoothly diagnose and treat intestinal obstruction and the like.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing the entire intestinal tract insertion catheter according to the present invention, and FIGS. 2 (a) and 2 (b) are enlarged sectional views showing a distal end portion according to an embodiment. FIGS. 3 (a) and 3 (b) are partially cutaway sectional views showing the overall structure of a conventional intestinal tract insertion catheter, and FIG. 3 (c) is a sectional view of the distal end part showing another conventional structure. 1 ... Metal sphere, 2 ... Guide part 3 ... Tube body, 4 ... Suction hole 5 ... Balloon, 6 ... Connector 7 ... Axial through hole 8 ... Metal ring 9 ... Main lumen 10 ...... Sub-lumen for fluid injection 11 ...... Sub-lumen for air introduction 12, 12 '... Spiral elastic body 13 ... Weight body, 14 ... Tip member 15 ... Coated tube, 16 ... Inner hole 17 ... Tube Material, 18 ... Through-pore

Claims (3)

[Claims] 1. A tube main body having a guide portion made of a flexible tube and a fluid inflatable balloon at a tip portion thereof, and a plurality of suction holes provided on front and rear tube surfaces of the balloon, and a sub body for inflating the balloon. A catheter structure in which a lumen body is extended to a side wall of the tube body, and the sub-lumen and the main lumen of the tube body are connected to a thin tube provided with a connector at a proximal end thereof, and a main lumen is provided inside the guiding portion. A spiral elastic body is internally provided in a state of forming a communicating inner hole, ring-shaped weight bodies for fixing the spiral elastic body are provided at both ends of the spiral elastic body, and a tip member is provided at the tip. A catheter for insertion into the intestinal tract characterized by being installed integrally. 2. The intestinal tract insertion catheter according to claim 1, wherein the spiral elastic body is internally provided as one series or a plurality of series as concentric circles. 3. The intestinal tract insertion catheter according to claim 1, wherein the tip member has a structure having a through hole communicating with the inner hole of the spiral elastic body or a sealing structure having no through hole.