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Valve element and medical instrument

A technology of valve body and slit, which is applied in the field of valve body and medical equipment to achieve excellent sliding properties, reduce contact area, and improve sliding properties

Active Publication Date: 2012-09-05
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For example, when a small crack is formed in the slit, the crack develops into a larger crack due to repeated insertion / extraction of the elongated member, causing the above-mentioned problems.

Method used

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  • Valve element and medical instrument
  • Valve element and medical instrument
  • Valve element and medical instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0229] The ribs 68 and protrusions 69 on the side of the lower surface 602 are not formed by transfer molding using silicone rubber. Figure 3 ~ Figure 12 Body shown, installed to make a figure 1 and figure 2 The sheath (introducer) shown. Silicone oil (viscosity 1000cSt) was applied to the first slit and the second slit of the valve body.

[0230] In addition, the dimensions of each part of the valve body in a natural state are as follows.

[0231] Long diameter of valve body: 8.6mm

[0232] The short diameter of the valve body: 7.7mm

[0233] The thickness of the valve body: 1.3mm

[0234] Depth (maximum depth) of the central portion of the first concave portion 64: 0.4mm

[0235] Length a of the bottom surface 651 of the second concave portion 65: 0.56 mm

[0236] Depth b of the second concave portion 65: 0.1 mm

[0237] Inclination angle θ1 of the side surface 652 of the second concave portion 65: 65° to 75°

Embodiment 2

[0239] It is the same as in Embodiment 1 except that the third concave portion 66 and the protrusion 67 are not formed.

Embodiment 3

[0241] It is the same as in Embodiment 1 except that the third concave portion 66 is not formed.

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Abstract

A valve element (6) is an elliptic or circular (disc-like) diaphragm-like elastic body having an upper surface (601) and a lower surface (602). On the upper surface (601) is formed a first depression (64) having a concave surface (641) with a curved bottom surface. The valve element (6) is opened and closed as a dilator (10) is inserted and removed and includes an opening / closing section (60) having a first slit (61), a second slit (62), a second depression (65), and two third depressions (66). The second depression (65) is located at a portion corresponding to an intersection (63) at the concave surface (641) of the valve element (6), and the third depressions (66) are located at opposite ends, respectively, of the first slit (61). The second depression (65) extends in the direction of the thickness of the valve element (6) to reach the middle of the first slit (61) and does not reach the second slit (62).

Description

technical field [0001] The present invention relates to a valve body and a medical device having an opening and closing portion that opens and closes when an elongated member such as a catheter, a guide wire, or a dilator is inserted or removed. Background technique [0002] An introducer (medical tool) is generally used when introducing a medical elongated member such as a catheter or a guide wire into a living body. As this introducer, for example, the introducer described in Patent Document 1 is known. [0003] The introducer includes a sheath and a dilator, the sheath has a cylindrical hub, a cover mounted on one end of the hub, and a sheath tube connected to the other end of the hub, The dilator is used by being inserted into a sheath for easy introduction of the sheath into the living body. The cover is provided with an opening communicating with the hollow part of the bushing. And, in order to cover the opening, that is, to maintain the liquid-tight state of the ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M39/00A61M25/00A61M25/08
CPCA61M25/0606A61M39/0693A61M39/0606A61M2039/2446A61M39/06A61M2039/064A61M2039/0633F16K15/147A61M2039/246F16K15/185A61M2039/2426A61M2039/062A61M2039/2433F16K15/1825
Inventor 杉木努笠井正秋今井幸男石井慎悟
Owner TERUMO KK