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Catheter

A catheter and slit technology, used in catheters, applications, diagnostic recording/measurement, etc., can solve problems such as easy kinking and reduced operability, and achieve the effects of improving safety, suppressing stress concentration, and improving operability

Active Publication Date: 2011-09-21
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, if the rigidity at the proximal end of the sheath is too high, the operability at the time of insertion into the guide catheter is reduced, and kinking is likely to occur.

Method used

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Embodiment Construction

[0046] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, for convenience of description, the dimensional ratios in the drawings may be exaggerated and may differ from actual ratios.

[0047] The ultrasound catheter 1 of the present embodiment is a catheter for observing the inside of a body cavity by ultrasonic diagnosis.

[0048] Such as figure 1 As shown, the ultrasonic catheter 1 has: a sheath 2 inserted into the body cavity; an imaging core 4 that transmits and receives ultrasonic waves to tissues in the body cavity;

[0049] Such as figure 2 As shown, the sheath 2 has a sheath tip portion 21 , a sheath tube 10 , and a filling fluid inlet and outlet component 23 .

[0050] The sheath tip part 21 is provided with: a cylindrical sheath tip part 27 formed with a guide wire lumen 211; an X-ray contrast marker 24 provided on a part slightly proximal to the tip part; Part 23. The guide wire 25 is inserted into the ...

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Abstract

The invention relates to a catheter. The occurrence of kinking is reduced, a proximal portion of a sheath exhibits steerability and the occurrence of a crack is suppressed. The catheter comprises a sheath to be inserted into a living body, wherein the sheath includes a tubular reinforcement layer of at least one layer, which is formed with a spiral slit continuous from the distal side to the proximal side thereof; a termination end of the spiral slit is provided on the proximal side of the slit proximal portion at the site of the proximal side of the spiral slit; and at the same time, there is formed a slit termination portion in which inclination angle of the spiral slit with respect to the circumferential direction of the reinforcement layer is larger than that of the slit proximal portion.

Description

technical field [0001] The present invention relates to a catheter inserted into a blood vessel and a living body such as a vessel. Background technique [0002] Conventionally, an ultrasound catheter having an imaging function is inserted into a blood vessel such as a coronary artery of the heart and a blood vessel such as a bile duct to perform image diagnosis. [0003] As an image diagnostic device, an intravascular ultrasonic diagnostic device (IVUS: Intra Vascular Ultra Sound) can be mentioned. Generally, an intravascular ultrasonic diagnostic device is configured to radially scan a probe incorporating an ultrasonic vibrator in a blood vessel, receive reflected waves (ultrasonic echoes) reflected by living tissues in a body cavity with the same ultrasonic vibrator, and then perform Amplification, wave detection, etc. processing, and according to the intensity of the generated ultrasonic echoes, the cross-sectional image of the blood vessel is drawn. [0004] In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B8/12A61M25/00
CPCA61B8/445A61B8/4461A61M25/0053A61M25/0054A61M25/0051A61M25/0021A61B8/12A61B1/00078A61M25/0045A61M25/0013
Inventor 伊藤阳一山下泰德桑野阳一郎
Owner TERUMO KK
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