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Injection needle

A technology of injection needles and needle tubes, applied in the field of injection needles, can solve the problems of not having injection needles, and achieve the effects of preventing unsuitable parts, high penetration resistance, and low penetration resistance

Active Publication Date: 2008-03-26
NIPRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the past, the actual situation is that there is no injection needle like the above

Method used

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Examples

Experimental program
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Embodiment 1

[0023] An embodiment of the present invention will be described below with reference to the accompanying drawings, but in the following description, for convenience, the left in Fig. 1 is the front, the top and bottom in Fig. 1 are left and right, and the top in Fig. 2 is the top. The injection needle of the present invention is formed as follows. That is, the front end of the straight needle tube 1 is obliquely ground (grinded) with respect to its axis C to form a pointed needle point 2 facing forward, and the part other than the needle point 2 of the needle tube 1 is the main body 3 . The top surface of the needle tip 2 , that is, the obliquely ground surface is the blade surface 4 , and the tip is the blade tip 5 . The blade surface 4 includes a first inclined surface (first inclined surface) 6 on the base side, and a pair of second inclined surfaces (second inclined surfaces) 7 located on the left and right sides on the front end side. The second inclined surface 7 is arr...

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Abstract

An object of the present invention is to provide an injection needle capable of discriminating between the internal hemorrhoid tissue and the rectal muscle layer under the tissue based on the difference in piercing resistance when injecting a drug into the internal hemorrhoid tissue. The front end portion of the needle tube (1) is ground obliquely with respect to its axis (C), the grinding surface is a blade surface (4), and the blade surface (4) includes a first inclined surface (6) located on the base end side, and a front end. A pair of second inclined surfaces (7) on both sides of the part side, the second inclination angle, which is the angle between the second inclined surface (7) and the axis (C), is larger than the first inclined surface (6) and the axis. The first inclination angle of the angle between the centers (C). The formation angle (θ) of the angle between the two second inclined surfaces (7) is in the range of 50° to 90°.

Description

technical field [0001] The present invention relates to an injection needle for medical use, in particular to an injection needle suitable for injecting medicine into internal hemorrhoid tissue. Background technique [0002] Hemorrhoids are included as a type of hemorrhoids caused by blood circulation disorder (blood stagnation) in the anus. The hemorrhoids are divided into internal hemorrhoids formed at the top of the dentate line of the anus and external hemorrhoids formed at the bottom, and internal hemorrhoids account for 40 to 60% of the whole. [0003] In the current treatment of internal hemorrhoids, conservative treatments such as drug therapy are performed for mild to moderate cases, and radical treatment is performed for severe cases. However, in the case of surgery, there are postoperative pain and anxiety about bleeding, and about 10 days of hospitalization is necessary, so in reality, many patients are troubled by not going to the hospital. [0004] In order t...

Claims

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Application Information

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IPC IPC(8): A61M5/32
CPCA61M2205/195A61M5/3286A61M5/32
Inventor 高桥宏太内田佳邦
Owner NIPRO CORP
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