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Medical instrument with attached needle

A medical device and needle tube technology, which is applied in the field of medical devices with needles, can solve problems such as cracks and drug leakage, and achieve the effects of suppressing leakage and improving reliability

Inactive Publication Date: 2013-06-05
TERUMO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no problem in the case where the bubbles 105 are independent bubbles, but when a plurality of bubbles 105 are formed continuously, the part becomes fragile, such as Figure 5 As shown, there may be cracks along the direction of the arrow
In this way, when a crack occurs in the needle holding portion 102, the medicine filled in the liquid storage portion 103 may leak to the outside.

Method used

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  • Medical instrument with attached needle
  • Medical instrument with attached needle
  • Medical instrument with attached needle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0024] 1. First Embodiment: Medical Device with Needle

[0025] 1-1. Structural examples of medical devices with needles

[0026] 1-2. How to assemble medical devices with needles

[0027] 1-3. Modifications

no. 2 Embodiment approach

[0028] 2. Second Embodiment: Medical Device with Needle

[0029]

[0030] figure 1 It is a sectional view showing the structure of the needle-equipped medical device 1 according to the first embodiment of the present invention, figure 2 It is a cross-sectional view showing a state before assembly of the needle-equipped medical device 1 . In this embodiment example, a prefilled syringe filled with a medical solution in advance will be described as an example of the medical device 1 with a needle.

[0031] [1-1. Structural example of medical device with needle]

[0032] Such as figure 1 As shown, the medical device with needle 1 of the present embodiment includes a needle tube 2 , a needle holder 3 holding the needle tube 2 , a sealing member 8 , and a liquid container 4 having a liquid chamber 12 capable of holding a drug.

[0033] As the needle tube 2, a needle tube with a diameter of 10 to 36 (ゲージのサイズ) (outer diameter: φ3.4 mm to 0.1 mm) in the ISO medical needle tub...

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Abstract

This medical instrument with attached needle is provided with a needle shaft (2) having a needle tip (2a) capable of piercing a living body and a needle hub (5) for immobilizing and holding the middle of the needle shaft (2) by high frequency welding so that the needle tip (2a) protrudes from one end and the base end (2b) of the needle shaft (2) protrudes from the other end. It also has a seal part (8) configured of an elastic component and provided on the outer circumference of the base end (2b) of the needle shaft (2) so as to be fluid-tight, and a liquid-accommodating part (9) having a liquid chamber capable of accommodating a liquid therein. With the base end (2b) of the needle shaft (2) communicating with the liquid chamber, the seal part (8) is compressed and clamped by the needle hub (5) and the liquid-accommodating part (9).

Description

technical field [0001] The present invention relates to a medical device with a needle in which a needle is preinstalled in a needle holding portion. Background technique [0002] In recent years, syringes made of plastic have been increasingly used all over the world due to the problem that syringes made of glass are broken during distribution. [0003] Conventionally, the fixation of the needle in the plastic syringe is mainly performed by an adhesive. However, in a prefilled syringe filled with medicine in advance, the adhesive may come into contact with the medicine in the syringe (liquid contact), which may adversely affect the medicine. Therefore, in the prefilled syringe as in Patent Document 1, the needle is usually attached to the syringe or the needle holder (needle hub) attached to the tip of the syringe by high frequency welding. [0004] exist Figure 5 In , as a conventional example, a schematic cross-sectional structural view and an enlarged view of main par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/34A61M5/28A61M5/32
CPCA61M5/329A61M5/32A61M5/344A61M5/28A61M5/343A61M5/34A61M5/3293
Inventor 立川浩一小川淳一
Owner TERUMO KK
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