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Puncture needle and catheter assembly

A puncture needle and main body technology, applied in the direction of catheters, needles, blood sampling devices, etc., can solve the problems of large angle of the blade tip, unable to pierce the blood vessel wall smoothly, and high piercing resistance.

Active Publication Date: 2022-05-17
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a puncture needle with a short blade surface length, even if the blade surface is multifaceted by forming a plurality of surfaces with different angles with respect to the direction of the central axis, the angle formed by the blade tip of the blade surface in a side view cannot be reduced. (Hereinafter, described as "edge angle"), the angle of the edge tends to become large
Therefore, there is a problem that the piercing resistance of the blade edge becomes large, and it is difficult to reduce the pain when the blade edge is pierced.
In addition, if the piercing resistance of the blade tip is high, it may not be possible to smoothly pierce the vessel wall such as the vessel wall when puncturing into a vessel, and the vessel may be pushed by the blade tip and deviate.

Method used

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  • Puncture needle and catheter assembly
  • Puncture needle and catheter assembly
  • Puncture needle and catheter assembly

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0062] figure 1 It is a figure which shows the main-body part 2 of the puncture needle 1 which is one embodiment. in particular, figure 1 (a) is a front view of the main body 2 of the puncture needle 1, figure 1 (b) is a side view of the main body 2 of the puncture needle 1, figure 1 (c) shows a rear view of the main body 2 of the puncture needle 1 . figure 1 (d) is a perspective view of the main body 2 of the puncture needle 1 . in addition, figure 2 (a) is to enlarge figure 1 (a) is an enlarged front view of a part of the main body 2 of the puncture needle 1 . figure 2 (b) is to enlarge figure 1 (b) is an enlarged side view of a part of the main body 2 of the puncture needle 1 .

[0063] Such as figure 1 (a)~ figure 1 of (d), figure 2 of (a), figure 2 As shown in (b), the puncture needle 1 includes a rod-shaped main body portion 2 , and a blade surface 4 is formed on the front end portion 3 of the main body portion 2 . Specifically, the main body portion 2 o...

no. 2 approach ＞

[0124] Next, a puncture needle according to another embodiment will be described. Figure 6 of (a), Figure 6 of (b), Figure 6 (c) and Figure 7 It is a figure which shows the puncture needle 101 which is 2nd Embodiment. in particular, Figure 6 of (a), Figure 6 of (b), Figure 6 (c) is a front view, a side view, and a rear view of the puncture needle 101, respectively. Figure 7 yes Figure 6 The VI-VI cross-sectional view in (b) is a cross-sectional view showing a cross-section perpendicular to the central axis O at the proximal end position of the third blade edge 125 of the puncture needle 101 . The blade surface 104 of the puncture needle 101 includes a first blade surface 105 , a second blade surface 106 , and a third blade surface 107 .

[0125] Such as Figure 6 and Figure 7 As shown, the puncture needle 101 includes a body portion 102 having a hollow portion 110 , and a blade surface 104 is formed at a front end portion 103 of the body portion 102 . The ...

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Abstract

This puncture needle is a medical puncture needle in which an edge surface is formed at the tip of a rod-shaped main body part, and the edge surface is provided with: a first edge surface part that extends obliquely with respect to the central axis of the main body part; and a second blade surface part which is formed on the rear surface side of the first blade surface part and which has a blade edge having a needle tip as one end formed by a ridge line intersecting with the first blade surface part, the first blade surface part being configured from a concave surface which is concave in a side view of the main body part in which the first blade surface part looks linear.

Description

[0001] The patent application of the present invention is a divisional application filed on the application dated March 18, 2019, the application number is 201980020513.X, and the invention name is "puncture needle and catheter assembly". technical field [0002] The present disclosure relates to introducer needles and catheter assemblies. Background technique [0003] Conventionally, as medical puncture needles such as blood collection needles and indwelling needles for infusion, there are known puncture needles that are provided with a front end that is opposite to the The longitudinal direction of the puncture needle has a plurality of blade surfaces with different angles. [0004] Patent Document 1 discloses an injection needle as such a puncture needle. The injection needle of Patent Document 1 is an injection needle in which a tapered tip is formed by obliquely cutting the tip of a cylindrical body from either side, and includes: A first inclined surface formed at a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/158A61B5/15A61M5/32
CPCA61M5/3286A61B5/150106A61B5/150458A61B5/150167A61B5/150992A61M5/158
Inventor 上田武彦长泽雅彦
Owner TERUMO KK