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Disposable Positive and Negative Pressure Syringes

A one-time, positive and negative pressure technology, used in hypodermic injection equipment, suction equipment, inoculation and ovulation diagnosis, etc., can solve the problems of unstable negative pressure suction effect, poor suction stability, syringe and needle movement, To achieve the effect of excellent suction effect, stable negative pressure and accurate puncture

Active Publication Date: 2021-07-09
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, ordinary syringes are likely to cause the position of the syringe and needle to move, the stability of negative pressure suction is poor, and the effect of negative pressure suction is unstable, which affects the suction effect

Method used

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  • Disposable Positive and Negative Pressure Syringes
  • Disposable Positive and Negative Pressure Syringes

Examples

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Embodiment Construction

[0020] The following examples facilitate a better understanding of the present invention, but do not limit the present invention. The following embodiments are only some of the embodiments of the present invention, but not all of them. The components used in the following examples are commercially available unless otherwise specified.

[0021] In the present invention, unless otherwise clearly stated and limited, in the absence of a contrary statement, "upper, lower, left, right, front, rear, inner, outer, vertical, horizontal" etc. are included in the terms The orientation words only represent the orientation of the term in the normal use state, or for the convenience of describing the present invention and simplifying the description, or the common name understood by those skilled in the art, unless otherwise clearly specified and limited, it should not be regarded as Technical Program Limitations.

[0022] Such as figure 1 As shown, the disposable positive and negative p...

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Abstract

Disposable positive and negative pressure syringes, including syringes, needles, pistons and push rods, the syringes and pistons are elliptical structures with an interference fit and anti-rotation function; the piston plug body is axially inside the rear end Nuts are inlaid and fixed coaxially, and several expansion joints are formed on the nuts along the axial direction. There is an internal thread, and the nut is screwed through the internal thread to fit the axial front end of the expansion bolt with a cylindrical structure, and the axial rear end of the expansion bolt is coaxially fixed with the axial front end of the push rod as a whole. The invention utilizes the principle of the expansion bolt, and by rotating the push rod, the expansion bolt is screwed into the nut to continuously expand the nut to expand the piston, prevent the displacement of the piston, and realize a stable negative pressure suction effect to suck thick liquid; it can generate both positive pressure and Negative pressure; simple structure, easy to use, suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of medical equipment and relates to an intravenous syringe, in particular to a disposable positive and negative pressure syringe. Background technique [0002] The syringe is usually composed of a cylindrical hollow syringe, a piston push rod installed in the hollow syringe, a fixed stroke piston fitted at the front end of the piston push rod, and a needle at the front end of the syringe. When in use, the piston is in interference fit with the inner wall of the syringe to form a closed space, and the liquid is sucked or pushed out. Under the existing technology, in the daily diagnosis and treatment activities, when performing vascular puncture, puncture of pleural and peritoneal effusion, and tumor cytology biopsy, ordinary syringes are usually used, and both hands are required to pull the piston push rod to make the inner wall of the syringe barrel and the piston Interference fit, forming a closed space to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/00A61B10/02A61B17/34
CPCA61M1/0023A61B10/0283A61B17/34A61M1/74A61M1/815
Inventor 赵思含
Owner XI AN JIAOTONG UNIV
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