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catheter

A catheter and catheter body technology, applied in the direction of the catheter, etc., can solve the problems of the lack of physical performance of the guiding catheter, and achieve the effects of shortening the compression time, reducing the burden on the body, and reducing the burden

Active Publication Date: 2020-03-27
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Patent Document 1, there is no mention of the physical properties of the guide catheter required when kinks occur, and a guide catheter having the above-mentioned functions is sought.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] On the wire obtained by forming an inner layer made of polytetrafluoroethylene (PTFE) on a copper wire having a diameter (2.160) mm corresponding to the inner diameter of the catheter to be produced, 8 wires are in the same direction, and the remaining 8 wires are in the same direction. Sixteen flat reinforcing wires 16 made of SUS304 with a width of 0.080 mm and a wall thickness of 0.035 mm were evenly arranged in the opposite direction along the circumferential direction, and were grouped and wound at a pitch of 0.180 mm. The effective width of the reinforcement line is 0.272mm.

[0086] Next, both ends of the reinforcement thread are cut and covered with a tube made of polyester elastomer, and the whole is covered with a heat-shrinkable tube and heated to heat-melt the inner layer with the tube as the outer layer. Then, the heat-shrinkable tube was peeled off to remove the copper wire, and a tube body having a through lumen with an outer diameter of 2.360 mm, an inne...

Embodiment 2

[0090] In addition to setting the width of the reinforcement line to 0.110mm, the wall thickness of the reinforcement line to 0.030mm, the distance between the reinforcement lines to 0.150mm, the effective width of the reinforcement line to 0.322mm, the outer diameter of the catheter body to 2.040mm, and the A catheter was fabricated by the same method as in Example 1 except that the inner diameter was 1.850 mm and the thickness of the catheter main body was 0.095 mm. The resulting catheter has a value A of 0.316 and a value B of 71750.

Embodiment 3

[0092] In addition to setting the width of the reinforcement line to 0.110mm, the wall thickness of the reinforcement line to 0.030mm, the spacing of the reinforcement lines to 0.250mm, the effective width of the reinforcement line to 0.277mm, the outer diameter of the catheter body to 2.360mm, and the A catheter was fabricated by the same method as in Example 1, except that the inner diameter was 2.160 mm and the thickness of the catheter main body was 0.100 mm. The resulting catheter has a value A of 0.300 and a value B of 75377.

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Abstract

The present invention provides a catheter that can satisfactorily ensure the passability of a medical device with respect to the lumen of the catheter even if the inner diameter is larger than the outer diameter and kinks occur. The catheter (1) has: an inner layer (22) forming the inner surface of the catheter body (2); an outer layer (23) forming the outer surface of the catheter body (2); a plurality of reinforcements embedded between the inner and outer surfaces Line (25), when setting the inner diameter of the catheter body (2) as (D1), the outer diameter as (D2), the wall thickness as (T1), the wall thickness of the reinforcement line (25) of the catheter body (2) as (T2 ), when the effective width of the reinforcing wire (25) of the catheter body (2) is (W), and the number of reinforcing wires (25) is (N), the following formula (1), formula (2) and formula ( 3). 0.050mm≤T1≤0.100mm Formula (1) T2 / T1≥0.25 Formula (2) 60000≤(D1·D2·W·N) / (T12·T2)<1000000 Formula (3).

Description

technical field [0001] The present invention relates to a catheter inserted into a lumen of a living body, and more particularly to a guide catheter for guiding a medical instrument such as a treatment catheter to a target site. Background technique [0002] A guide catheter for guiding the treatment catheter is used to insert a treatment catheter (dilation catheter, stent placement catheter, etc.) for insertion into a living body lumen such as a blood vessel for treatment, diagnosis, etc., into a target site. [0003] In the guide catheter, in order to reduce the burden on the patient, the incision of the blood vessel insertion part is required to be small, and in order to reduce friction with the blood vessel, a smaller outer diameter is required. On the other hand, a treatment catheter inserted into a guide catheter is required to have a larger outer diameter in order to exert sufficient effects on a target site such as a treatment site. Therefore, a larger inner diamete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M25/00
CPCA61M2025/0025A61M25/005
Inventor 大岳祐八羽室皓太田代纮一郎丸山真理子福冈彻也
Owner TERUMO KK
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