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, and shortening the time of bed rest

Active Publication Date: 2016-11-09
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 cat...

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

Provided is a catheter capable of favorably ensuring the passability of a medical instrument into the lumen of the catheter even when the inner diameter is large in comparison to the outer diameter, or when a kink occurs. A catheter (1) having an inner layer (22) for forming the inner surface of the catheter body (2), an outer layer (23) for forming the outer surface of the catheter body (2), and a plurality of reinforcing wires (25) embedded between the inner and outer surfaces, the catheter (1) being one which satisfies formula (1), formula (2) and formula (3), given that the inner diameter of the catheter body (2) is (D1), the outer diameter thereof is (D2), the wall thickness thereof is (T1), the wall thickness of the reinforcing wires (25) of the catheter body (2) is (T2), the effective width of the reinforcing wires (25) of the catheter body (2) is (W), and the number of reinforcing wires (25) is (N). 0.050mm<=T1<=0.100mm (formula (1)) T2/T1>=0.25 (formula (2)) 60,000<=(D1*D2*W*N)/(T12*T2)<1,000,000 (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 device such as a treatment catheter to a target site. Background technique [0002] In order to insert a treatment catheter (dilation catheter, stent placement catheter, etc.) into a target site for insertion into a living lumen such as a blood vessel for treatment, diagnosis, etc., a guide catheter for guiding the treatment catheter is used. [0003] In the guide catheter, in order to reduce the burden on the patient, the incision of the blood vessel insertion portion 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, the treatment catheter inserted into the guide catheter is required to have a larger outer diameter in order to exert a sufficient effect at a target site such as a treatment site. Therefore, the guide cat...

Claims

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Application Information

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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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