JP2593080Y2 - Medical tube introduction tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an introduction tool used for ensuring safety and certainty when introducing medical tubing such as a catheter into a body, particularly into a blood vessel.

[0002]

BACKGROUND OF THE INVENTION For diagnostic and therapeutic purposes, for example, vascular balloon catheters, angiographic catheters,
When introducing a catheter with a sensor for detecting H, oxygen, and the like into a blood vessel, extremely careful, safe, and reliable treatment operation is required.

[0003] Usually, as a procedure for percutaneously introducing a vascular catheter into a blood vessel, first, a guide wire is inserted into the blood vessel by a cell singer method, and then an introducer combined with a dilator is inserted along the guide wire. After infiltration into the blood vessel, the dilator and the guide wire are removed to leave the distal end of the introducer, and a process of intubating the catheter into the blood vessel along the guidance of the introducer is employed.

As shown in FIG. 1, an introduction tool used for this treatment includes a main body part (2) to which a sheath tube (1) is connected, a cap part (3) fitted with the main body part (2), and A membrane-shaped valve member (5) made of an elastic substance for holding a catheter (4) inserted and fixed between the body part (2) and the cap part (3) in a liquid-sealed state; It is composed of This catheter is inserted into the target site while being manipulated (twisted, pushed, pulled) at hand, but the force applied at hand due to friction and resistance with the valve member (5) is transmitted well to the tip of the catheter. However, it was difficult to insert a particularly long and thin catheter.

Therefore, as a countermeasure, an attempt was made to reduce friction and resistance by applying a lubricant such as silicone oil having excellent biosafety to the surface of the valve member. In the case of an operation in which a number of catheters are exchanged via the catheter, there is a problem that the lubricant is almost lost when the first catheter is inserted, and it becomes difficult to insert the second and subsequent catheters.

Further, a lubricant such as silicone oil diffuses and is absorbed into the valve member with the passage of time, so that the lubricant disappears from the surface of the valve member, and the valve member swells and swells. There is also a problem that the passage resistance increases.

[0007]

In the present invention, when a medical tube such as a catheter is inserted through the tube introducing tool, the insertion is not performed due to frictional resistance between the medical tube and the valve member. An object of the present invention is to provide a tube introduction tool which can solve the problem of difficulty, and has high safety and certainty especially when introduced into a blood vessel.

[0008]

That is, the present invention provides a main body portion having a branch tube whose diameter is enlarged from a distal end portion to which a sheath tube is connected, a cap portion having a rear end opening fitted into the main body portion, A valve member that is sandwiched and fixed between the main body portion and the cap portion to maintain a liquid-sealed state with the insertion tubes, and the valve member is made of a rubber-like material previously impregnated with a lubricant such as silicone oil. This is a medical tube introduction tool characterized by being made of an elastic material and having a lubricant oozing out with time.

First, the tube introduction tool according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a medical tube introduction tool according to the present invention.
(3) is a cap portion, and (5) is a valve member.

The body part (2) has a distal end connected to a sheath tube (1) for introducing a catheter (4) into the body, and supplies a drug solution or the like to a body part having an enlarged diameter from the distal end. A branch pipe (7) is provided. The length of the sheath tube (1) varies depending on the purpose, but is generally set within a range of 10 to 170 mm. The cap portion (3) is coupled to the main body portion (2) to form a rear end opening (10). The valve member (5) is sandwiched and fixed between members of the main body part (2) and the cap part (3), and when the tubes are not inserted, the introduction hole () is defined by the body part of the main body part (2). 11)
Is closed, and when a tube such as a catheter (4) is inserted therethrough, a disc-like membrane valve made of a rubber-like elastic material impregnated with a lubricant in advance so as to be in close contact with the outer surface and maintain a liquid-sealed state. It is formed. It is preferable to set a plurality of valves as shown in FIG. 1 so as to ensure sealing performance.

A major improvement of the present invention is that the valve member (5) in the above structure is impregnated with a lubricant such as silicone oil having excellent biosafety to a temperature close to normal temperature and close to a saturated state. Is that it gradually oozes out over time.

In the present invention, as the rubber elastic substance constituting the valve member (5), it is preferable to use a silicone rubber, and especially a medical silicone rubber made of dimethylpolysiloxane from the viewpoint of safety.

On the other hand, the lubricant to be impregnated into the valve member is not particularly limited as long as it is excellent in biosafety, but it is preferable to use silicone oil, especially methylphenyl silicone oil. . Methylphenyl silicone oil is quickly absorbed by dimethylpolysiloxane rubber by heating to about 30 to 40 ° C., and reaches a saturated state. The content ratio at this time is about 5
%, Even if the surface silicone oil is wiped off, it gradually oozes out from the inside, and the lubricity of the surface is maintained. Dimethyl silicone oil can also be used, but the impregnation rate is slightly slow, and the amount of absorption in a saturated state is large, so that the valve member expands and deforms. Therefore, the silicone oil content is limited to about 5 to 8%. Is good.

Next, the method of use and operation of the medical tube introduction device according to the present invention will be described. First, a hollow needle with an inner needle is percutaneously punctured and inserted into a blood vessel.Then, the inner needle is withdrawn and a guide wire is inserted into the hollow needle. Leave in.
Therefore, as shown in FIG.
The distal end of the dilator (dilator) (13) is inserted along the 2) while expanding the wall hole of the blood vessel, and the sheath tube (1) is introduced into the blood vessel. Next, the dilator (13) and the guide wire (12) are withdrawn while inserting the supply tube (14) into the branch pipe (7) and injecting heparinized saline into the introduction hole (11). Here, FIG.
As shown in (b), the catheter (4) is smoothly introduced into the blood vessel (15) via the tube introduction tool (25). The operation of the valve member (5) in the operation process is as follows.
While the guide wire (12) and the dilator (13) are being inserted, the outer surface thereof is tightly sealed and liquid-sealed to prevent backflow and outflow of blood. Even when the guide wire (12) and the dilator (13) are removed, it functions to completely block the blood flowing backward through the sheath tube (1).

[0015]

[Effect of the Invention] As described above, the medical tube introduction tool according to the present invention uses the valve member from which the lubricant gradually leaks out. Smooth operation can be performed by suppressing frictional resistance, and it is possible to perform treatment with excellent safety and certainty.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tube introduction tool according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a tube introduction tool is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath tube 2 Main part 3 Cap part 4 Catheter 5 Valve member 7 Branch pipe

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A61M 25/00 A61L 33/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A main body portion having a branch pipe whose diameter is enlarged from a distal end portion to which a sheath tube is connected, a cap portion having a rear end opening fitted into the main body portion, and a portion between the main body portion and the cap portion. And a valve member for holding a liquid-sealed state with the insertion tubes, and the valve member is made of a rubber-like elastic material impregnated with a lubricant of 5 to 8% in advance. Medical tube introduction tool. 2. The medical tube introduction tool according to claim 1, wherein the rubber-like elastic material constituting the valve member is dimethylpolysiloxane rubber, and is impregnated with silicone oil as a lubricant.