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Indwelling needle device

A technology of indwelling needles and external needles, which can be used in the direction of needles, guide needles, hypodermic injection devices, etc., and can solve problems such as blood vessel injuries

Active Publication Date: 2015-02-04
JMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The indwelling soft outer needle makes the patient's blood vessel less likely to be injured

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] figure 1 It is a perspective view seen from above of the indwelling needle device 100 according to Embodiment 1 of the present invention with the inner unit at the initial position. For the convenience of the following description, an orthogonal coordinate system is set in which the longitudinal direction of the indwelling needle device 100 is the Z axis, and the horizontal axis and vertical axis perpendicular to the Z axis are the X axis and the Y axis, respectively. Align the arrow side of the Y-axis (i.e., figure 1 The upper side of the sheet) is called "upper side", and the opposite side is called "lower side". Here, the “horizontal direction” and the “up and down direction” do not mean the orientation of the indwelling needle device 100 during actual use. And, the patient will be punctured on the side (the side of the arrow of the Z axis, that is, figure 1 The left side of the paper surface) is called the "front side", and the opposite side is called the "bac...

Embodiment approach 2

[0082] In Embodiment 1 above, the small-diameter region 33 of the outer needle 30 is fixed to the inner needle 50 so that the inner unit 102 at the initial position does not move toward the retracted position due to the reaction force received by the inner needle 50 during puncturing. In Embodiment 2, instead of this, the outer bush 25 and the inner bush 40 are fixed. Hereinafter, the indwelling needle device of the second embodiment will be described focusing on the differences from the first embodiment.

[0083] Figure 7 It is a cross-sectional view along the horizontal plane (XZ plane) showing the outer hub 25, the inner hub 40, and their vicinity in the indwelling needle device according to Embodiment 2, when the inner unit 102 is at the initial position. Such as Figure 7 As shown, when the inner unit 102 is in the initial position, the front edge of the large-diameter portion 45 of the inner bush 40 collides with the rear edge of the outer bush 25, so that the inner u...

Embodiment approach 3

[0094] In Embodiment 1 described above, the small-diameter region 33 of the outer needle 30 is fixed to the inner needle 50 so that the inner unit 102 at the initial position does not move toward the retracted position due to the reaction force received by the inner needle 50 during puncturing. In Embodiment 3, instead of this, the seal cylinder 21 and the inner bush 40 are fixed. Hereinafter, the indwelling needle device of the third embodiment will be described focusing on the differences from the first embodiment.

[0095] Figure 8 It is a cross-sectional view along a horizontal plane (XZ plane) showing the inner hub 40 and its vicinity in the indwelling needle device according to Embodiment 3 when the inner unit 102 is at the initial position. Such as Figure 8 As shown, when the inner unit 102 is at the initial position, the front edge of the large-diameter portion 45 of the inner bush 40 collides with the rear edge of the outer bush 25, whereby the inner unit 102 is p...

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PUM

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Abstract

An outer unit (101) is provided with a shield (20) having an inner cavity (24) and a soft outer needle (30) fixed to the front end of the shield. An inner unit (102) is provided with an inner hub (40) arranged inside the inner cavity of the shield, a hard inner needle (50) fixed to the front end of the inner hub, and a tube (60) connected to the rear end of the inner hub. The inner unit displaces relative to the outer unit from an initial position where the inner needle passes through the outer needle and protrudes from the front end of the outer needle, to a retracted position where the inner needle is stored inside the inner cavity of the shield. The inner unit in the initial position is fixed to the outer unit so that the inner unit does not move towards the retracted position due to the reaction force received by the inner needle when the inner unit is arranged in the initial position and inner needle pierces an object.

Description

technical field [0001] The present invention relates to an indwelling needle device, which comprises a soft outer needle and a hard inner needle, punctures a patient with the front end of the inner needle protruding from the front end of the outer needle, and then makes the inner needle Back away from the outer needle. Background technique [0002] Indwelling needle devices are widely used for infusion, blood transfusion, extracorporeal blood circulation and other treatments. In such procedures, there is a risk of injury to the blood vessel when the metal needle is indwelled in the blood vessel. Therefore, an indwelling needle device including a soft outer needle and a hard inner needle is known. The outer needle and the inner needle are punctured into the blood vessel of the patient with the tip of the inner needle protruding from the tip of the outer needle, and then the inner needle is retracted from the outer needle to leave only the outer needle on the patient. The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/06
CPCA61M25/0606A61M25/0631A61M5/158A61M5/1626A61M2005/1583
Inventor 藤井亮至植松雷太
Owner JMS CO LTD