Hollow medical needle, and method for producing hollow medical needle

A medical, hollow technology, applied in the direction of manufacturing tools, needles, and instruments introduced into the body, can solve the problems of puncture pain, high puncture resistance, and increased puncture resistance, and achieve the effect of pain relief

Active Publication Date: 2013-08-07
NIPRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, through the examination of the inventors, it is clear that the hollow needle for medical use in the shape of the blade surface having the first to fifth inclined surfaces described in Patent Document 1 and Patent Document 2 is still improved in reducing the puncture resistance room for effect
Especially as in Patent Document 1 image 3 In a medical hollow needle with a conventiona

Method used

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  • Hollow medical needle, and method for producing hollow medical needle
  • Hollow medical needle, and method for producing hollow medical needle
  • Hollow medical needle, and method for producing hollow medical needle

Examples

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Embodiment

[0076] Figure 9 shown as an example with the above Figure 1 to Figure 6 The measurement results of the puncture resistance of medical hollow needles with the structures shown in and the specific structures shown in [Table 1] and [Table 2] below. This measurement is obtained by directing the central axis of a medical hollow needle towards the surface of a 0.04 mm polyurethane sheet and measuring the resistance value (gf) as the needle advances at a constant speed of 20 mm / min to puncture and penetrate into the sheet. These measurement results show that the hollow needle for medical use constructed according to the present invention suppresses the peak value of the puncture resistance in each puncture of the distal end portion 20, the middle portion 24, and the base end portion 22 at a low level without making it rise, and the peak value The difference between levels is kept small. In [Table 2], h2 indicates the height of the second and third ridges (see figure 2 ).

[00...

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PUM

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Abstract

A hollow medical needle (10) structured in accordance with the present invention, wherein the puncture resistance of a blade surface over the entire puncture direction can be made substantially uniform, and the pain of a patient at the time of puncture can be reduced due to a decrease in the peak level of puncture pain and to a reduction in the duration of sensory awareness of the puncture pain by the use of the blade surface of a novel shape employing, in combination with each other, first to fourth inclined surfaces (26, 30, 32, 42, 42) having specific directions of incline. Accordingly, the present invention provides a hollow medical needle comprising the blade surface of a novel shape by which puncture pain can be further relieved in comparison with a conventionally structured product, and also provides an advantageous method for producing the same.

Description

technical field [0001] The present invention relates to a medical hollow needle used for subcutaneous injection, dialysis, drip, blood collection, blood transfusion, infusion, etc., and to a method of manufacturing the medical hollow needle. Background technique [0002] Traditionally, medical hollow needles, such as injection needles, have been used to inject pharmaceutical solutions, blood, etc. into the body or to collect blood and other fluids from the body. This hollow needle for medical use is made into a sharp shape with a chamfered edge surface formed at the tip of a thin cylindrical needle tube. [0003] There are various ways of forming the blade surface, one of which is a cutting method called "lancet cutting". The lancet cutting is provided with a first inclined surface on the base end side, and a second inclined surface inclined at the same angle in opposite directions to each other around the central axis is provided on either side of the periphery of the tip ...

Claims

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Application Information

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IPC IPC(8): A61M5/158
CPCA61M5/42A61M5/3286A61M5/158B24B19/16A61M5/00
Inventor 岩濑芳治江泉丰
Owner NIPRO CORP
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