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Disposable micro-syringe

A syringe and disposable technology, applied in the field of medical devices, can solve problems such as difficulty in ensuring uniform pressure, inability to complete the injection dose, blockage of micro-needle holes, etc., and achieve the effects of convenient transportation and distribution, convenient mass production, and favorable treatment.

Inactive Publication Date: 2011-04-20
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this painless micro-syringe has the following disadvantages: 1. During the injection process, the square flexible container of the syringe is difficult to ensure that the pressure in it is uniform, so that the micro-needle holes are easily blocked and there is drug residue after injection; 2. Most of the micro-needles are brittle. 3. The micro-injector has only 8 microneedles, if there are clogged microneedles or / and broken microneedles, the amount of medicine injected will not be completed and the medicine will be wasted

Method used

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Examples

Experimental program
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Embodiment 1

[0030] The structural design of the microneedle cluster disk 2 in this embodiment is: on a silicon chip with a diameter of 10 mm, a diamond-shaped grid distribution design is adopted, and 253 microneedles are evenly distributed. Among them, 12 microneedles 31 are evenly distributed close to the wall A of the flexible container 1; 6 microneedles 32 are evenly distributed at a distance B93 μm from the flexible container 1 wall; There are 12 microneedles 33 and 34, and the distribution of these microneedles 3 is based on the wall of the flexible container 1 and extends toward the center of the circle. figure 2 ), and the distance between them is 500 μm. The hemispherical flexible container 1 is made of PDMS material and has a diameter of 10 mm. According to the design requirements, after filling the drug (insulin in this embodiment), the hemispherical flexible container 1 and the microneedle cluster disc 2 are airtightly bonded together by bonding technology to prepare a dispos...

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Abstract

The invention relates to a disposal micro-syringe and is characterized in that the syringe is hermetically assembled by a hemispherical flexible container and a matched micro-needle cluster disc; conical micro-needles are distributed on the micro-needle cluster disc according to a rule, namely, the micro-needles are distributed in concentric circles, rectangular grids or rhombic-shaped grids, and the micro-needle is 220 microns to 250 microns in height and 30 microns to 45 microns in the hole diameter; an inclined needle point is arranged downwards 40 microns to 60 microns at the end of the micro-needle; additionally, the maximum density of the micro-needle is 9 needles / mm<2> and the width between the centers of the micro-needles is not less than 500 microns.

Description

technical field [0001] The invention belongs to medical equipment, in particular to a disposable micro-injector, and the main classification number of the international patent is intended to be Int.Cl.A61M5 / 00(2006.01)I. Background technique [0002] Oral drugs are mainly absorbed by the digestive system, and after entering the blood, they are sent to the whole body through the circulatory system to achieve therapeutic effects. Under normal circumstances, after the human body takes a drug orally, the liver and kidneys usually eliminate most of the drug, which reduces the efficacy or curative effect of the drug on the one hand, and wastes resources on the other. Therefore, people invented the subcutaneous injection of the drug. To achieve the same curative effect as subcutaneous injection, the oral dose must be equivalent to several times the amount required for subcutaneous injection. Not only that, some drugs such as insulin and vaccines cannot be effectively absorbed by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178
Inventor 曹东兴贾秋伶王秀红张绪景南腊香
Owner HEBEI UNIV OF TECH