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Pneumatic needleless injector

A needle-free syringe and pneumatic technology, applied in the field of medical devices, can solve problems such as pain, unstable injection, uneven force, etc., and achieve the effect of reducing damage, reasonable structure, and eliminating pain

Active Publication Date: 2017-10-17
NANYANG CITY CENT HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention uses springs to generate instantaneous high pressure, uneven force, unstable injection, and pain

Method used

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  • Pneumatic needleless injector
  • Pneumatic needleless injector
  • Pneumatic needleless injector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0074] The pneumatic needle-free injector described in this example is an improvement on the basis of Example 1, wherein:

[0075] refer to Figure 10 , the housing is provided with a slide switch 18, the slide switch is provided with an air guide channel 19 and an exhaust hole 20, and the air guide channel connects the pressurized air channel 7 or the return air channel 8 with the main air channel 21 connected.

[0076] refer to Figure 10 , the air source is connected to the main airway 21.

[0077] The slide switch controls the connection and closure of the main airway and the pressurized airway or the return airway, and the connection and closure of the return airway and the exhaust hole.

[0078] The slide switch sets three positions. When the slide switch slides to one side, the main airway communicates with the recovery airway, and the gas enters the recovery cavity to increase the pressure in the recovery airway; when the slide switch slides to the other side, the ...

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Abstract

The invention provides a pneumatic needleless injector, and belongs to the technical field of medical apparatus and instruments. The pneumatic needleless injector includes: a housing; a hammer, a first spring, and a limiting table are arranged in the housing; the hammer divides an inner cavity of the housing into a pressurization cavity and a returning cavity; the pressurization cavity communicates with a pressurization air channel; the returning cavity communicates with a returning air channel; a second spring, an exhaust channel and a first slide block are arranged in an inner cavity of the limiting table; an injection switch is arranged on a side wall of the housing; a second slide block is arranged in the returning cavity; a medicine rod connection member is arranged in a front end of the housing; and the medicine rod connection member passes through a medicine control rotary knob and is in matching connection with an ampoule bottle. The pneumatic needleless injector is novel in structure, is reasonable in design, adopts a pneumatic pressurization principle to maintain the pressure value in a suitable range capable of maintaining an injection pressure, is safe to use, can achieve noninvasive injection, can eliminate pain, can significantly reduce damage, and can facilitate operation and use of general noninvasive medical workers.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a pneumatic needle-free injector. Background technique [0002] Needle-free injection refers to the use of instantaneous high pressure generated by a mechanical device (such as a spring or high-pressure gas) to force the drug to be extruded from the tiny holes to form a high-pressure jet. Penetrate through human or animal skin to reach the best part for drug absorption. [0003] Compared with traditional subcutaneous injection, needle-free injection is a new injection method, which has many advantages such as painless, good drug absorption, convenient operation, and elimination of cross-infection. Domestic commercial needle-free injectors generally have problems such as high cost, unstable injection, and large vibration and noise, and they cannot be widely used. Therefore, it is necessary to optimize the structure of existing needle-free injectors to make...

Claims

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Application Information

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IPC IPC(8): A61M5/30A61M5/31
CPCA61M5/30A61M5/31
Inventor 张松雨李燕李纲
Owner NANYANG CITY CENT HOSPITAL
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