JPH03168156A - Intestinal insertion catheter - Google Patents

Abstract

PURPOSE:To forwardly guide a catheter tube without damaging the inner wall of the intestines by providing a sub-lumen to the side wall of a tube main body and connecting the sub-lumen and a main lumen to a fine tube having a connector provided to the rear end part thereof and forming the tube of a guide part from a flexible resin having specific modulus of elasticity and forming the tube main body from a resin having specific modulus of elasticity. CONSTITUTION:A main lumen and a sub-lumen becoming a passage injecting a liquid for inflating a balloon are provided to a tube main body 11. Further, the balloon 2 and a plurality of suction orifices 5 are provided and, in order to enhance suction effect or to prevent the excessive application of suction pressure, a sub-lumen becoming an air introducing passage is provided. The tube main body 11 is formed by selecting material quality having the modulus of elasticity of 200-800kgf/cm<2> and the forward insertion thereof from the curvature of the stomache becomes extremely easy and the tube 13 of a guide part 12 is formed from material quality having the modulus of elasticity of 20-100kgf/ cm<2> and the insertion property thereof in the winding intestinal tract is excellent and the damage of the inner wall of the intestines can be suppressed to the min.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a catheter that is inserted into the intestine through the nose and used for diagnosis and treatment in cases associated with intestinal obstruction.

[Conventional technology]

Traditionally, in the diagnosis and treatment of intestinal obstruction, etc., a catheter is passed through the esophagus through the gastrointestinal bulge through the nose in order to relieve the internal load and relieve the obstruction by draining the intestinal contents or decompressing the intestinal tract. It is often inserted into the intestinal tract.

FIG. 2 shows the structure of a catheter used for such purposes. That is, in the guide part (3) at the tip of the catheter,
The tube body (1) is also provided with a plurality of suction holes (5), which are embedded with metal balls (4) to give a predetermined weight to facilitate insertion of the catheter. A balloon (2) is provided near the tip.

The tube body (1) usually has 2 to 3 lumens.
Basically, it is provided with a main lumen that serves as a passage for discharging intestinal contents to the outside of the body, and a sub-lumen for injecting inflation liquid into the balloon (2). In addition, a sub-lumen {-1 may be provided which serves as an air introduction passageway to improve suction efficiency and prevent excessive suction to the intestinal wall. Negative pressure suction is applied to the main lumen for suctioning and discharging intestinal contents through a suction hole (5) and a connector (6) at the rear end of the catheter.

After passing through the pyloric ring, the balloon (2) functions to advance the catheter to the obstructed part of the intestine by rolling movement of the intestine.

The guiding part (3) and the tube body (
1) is made by gluing or integrally forming parts of the same material, and is made of silicone rubber or soft polyvinyl chloride resin. In the case of silicone rubber, the guide part (3
) has the advantage of not damaging the intestinal wall because it is flexible, but the tube body (1), on the other hand, has the problem of poor insertability because it has no stiffness. Therefore, when pushing the tube into the intestines, it is generally necessary to insert a wire into the inner tube body (1) to give it an appropriate stiffness. In addition, the guide wire inserted into the tube body (1) itself is made of noricorn rubber, so it does not slip easily.
Even if it were possible to insert the gastrointestinal tract, it would form a spiral in the gastrocorpus, making it difficult to pass through the pyloric ring.

On the other hand, in the case of a catheter made of soft polyvinyl chloride resin, unlike silicone rubber, the insertion of the guide wire is good and there is no swirling in the gastric corpus, but the tip of the catheter is hard and flexible at the bend in the intestinal tract. It is difficult to insert the canal because it cannot follow the flow, and there is also a risk of damaging the extremely fragile inner wall of the intestinal obstruction and causing perforation.

[Problems to be Solved by the Invention] An object of the present invention is to provide an intraintestinal catheter whose distal end can smoothly and quickly pass through the pyloric ring without using a guide wire or the like. That's true.

[Means to solve the problem]

That is, the present invention consists of a guide part in which a spherical weight is embedded in the tip part, a tube body having a balloon near the tip part, and suction holes provided in the front and rear ends of the tube. A sub-lumen serving as a fluid passage for inflating the Haroon is provided on the side wall of the main body, and the sub-lumen and the main lumen of the tube main body are connected to a thin tube equipped with a connector at the rear end, and the guide portion The tube is made of flexible resin with an elastic modulus of 20 to 100 kg f/c+jl, and the tube body is 200 to 800 kg.
This is an intraintestinal insertion catheter characterized by being made of a resin having an elastic modulus of f/cIll.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a sectional view of the distal end of an intraintestinal catheter according to an embodiment of the present invention. The overall basic structure is the same as the conventional one, but the guiding part (12) has a plurality of metal balls (14) buried in the inner cavity of a flexible tube (13) to seal the front and rear ends. The inner core (
15). If necessary, a reinforcing tube (16) is bonded to the tube (13) and the tube body (11) so as to cover the outer wall to increase the joint strength. Furthermore, it is also possible to install an X-ray opaque line in the tube body (11) or to mix in an X-ray opaque agent.

The tube body (l1) has the same structure as a conventional catheter.
A main lumen that serves as a passage for discharging the aspirate;
A sub-lumen is provided to serve as a passageway for injecting liquid for balloon inflation. In addition, a balloon (2) and multiple suction holes (5) are installed, and a sub-lumen that serves as an air introduction passage is installed to improve the suction effect and prevent excessive suction pressure from being applied if necessary. can also be given.

Examples of the material for the tube body (1l) include soft polyvinyl chloride resin, urethane resin, polyamide resin, polyester resin, etc.
Examples of 13) include silicone rubber, urethane resin, natural rubber latex resin, etc., but are not particularly limited to these.

The tube body (1l) has an elastic modulus of 200-800kg
By selecting the quality between f/crR, it is possible to have an appropriate waist, which makes it extremely easy to insert beyond the gastric body cavity, and even if a guide wire is used, it slides well. It is. Furthermore, even when a guide wire is not used, it can be inserted smoothly, resulting in improved operability and rapid treatment. Elastic modulus is 200
If it is less than kgf/cf+, the stiffness of the tube body (1l) will be insufficient, and therefore it will be impossible to improve insertability, which is the objective of the present invention. Also, the elastic modulus is 800kgf/cA
When it exceeds 1, the waist of the tube body (11) is too strong, increasing the burden on the patient and the risk of damaging the intestinal wall.

On the other hand, the tube (13) of the guiding part (12) is made of a material with an elastic modulus in the range of 20 to 100 kgf/ca to have appropriate flexibility, so that it can be easily inserted into the tortuous intestinal tract. It can also minimize damage to the intestinal lining. However, if the elastic modulus of the tube (13) is lower than 2Qkgf/crR, the insertability may be reduced, the strength may be reduced, and there is a risk of breakage.

Moreover, if the elastic modulus exceeds 100 kg f /c+Il, there is a risk of damaging the intestinal wall, which is not preferable.

For the above reasons, the guide part (12) has appropriate flexibility and the tube body (12) has appropriate waist strength.
By combining 1), it becomes possible to realize an extremely effective catheter for insertion into the intestinal tract. Note that the elastic modulus used here is a value determined from the tensile or compressive stress within the elastic limit and the amount of elongation or contraction, but is not particularly limited to this method.

〔Effect of the invention〕

As described above, by using the intraintestinal insertion catheter according to the present invention, the guiding part at the tip has appropriate flexibility, so the catheter tube can be guided without damaging the intestinal wall, and the tube body has a suitable waist. Because of its strength, it can be easily inserted into the intestinal tract without inserting a guide wire into a catheter, making it useful as a medical tool for diagnosis and treatment of intestinal obstruction and the like.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of the distal end portion of an intraintestinal catheter according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the overall structure of a conventional intraintestinal catheter.

Claims (1)

[Claims] (1) Consists of a guide part with a spherical weight embedded in the tip, a balloon near the tip, and a tube body with a plurality of suction holes on the tip and rear ends of the balloon,
A sub-lumen serving as a fluid passage for inflating the balloon is provided on the side wall of the tube body, and the sub-lumen and the main lumen of the tube body are connected to a thin tube equipped with a connector at the rear end, and the guide The tube is made of flexible resin with an elastic modulus of 20 to 100 kgf/cm^2, and the tube body weighs 200 to 800 kg.
An intraintestinal insertion catheter characterized by being made of a resin having an elastic modulus of f/cm^2.