Safe medical trocar having withdrawing guide structures

A technology of guiding structure and trocar, applied in the field of medical devices, can solve problems such as puncture of blood vessels, accidental injury and infection of patients, and infection of operators
CN107789702AActive Publication Date: 2018-03-13SHANGHAI CHANGZHENG HOSPITAL
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI CHANGZHENG HOSPITAL
Publication Date
2018-03-13

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Abstract

The invention discloses a safe medical trocar having withdrawing guide structures. The safe medical trocar includes a catheter seat, an indwelling catheter, a needle seat, and a puncture needle; one end of the puncture needle is fixed on the needle seat; the puncture needle and the needle seat are of hollow structures communicating with each other; the trocar includes a puncturing state and an indwelling state; in the puncturing state, the puncture needle is placed in the indwelling catheter; in the indwelling state, the puncture needle is placed in the catheter seat; the trocar can changes into the indwelling state from the puncturing state by withdrawing the needle seat; the trocar also includes a withdrawing member for drawing and pulling the needle seat so as to allow the trocar to change into the indwelling state from the puncturing state; and withdrawing guide structures are arranged on an inner surface and an outer surface of the catheter seat and are used for instructing the withdrawing member and the needle seat to perform guide withdrawing. The medical trocar can effectively prevent accidental injury, and can significantly lower the later recovery processing risk of the medical trocar.
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Description

technical field

[0001] The invention relates to the field of medical devices, in particular to a safe medical trocar with a retraction guiding structure. Background technique

[0002] Clinically, the medical trocar is a widely used medical device. Taking the commonly used disposable intravenous infusion needle as an example, it is mainly composed of a protective cap, a steel needle, a needle seat, a needle wing, and a connecting tube.

[0003] When in use, the medical staff first removes the protective cap covering the steel needle, and then uses the steel needle to perform venous blood vessel puncture, sees blood return and performs infusion after confirming that the puncture is successful. During the whole process of infusion, the steel needle remains in the blood vessel. However, because the needle tip of the steel needle is very sharp, the patient stretches his limbs during the infusion, and the probability of the blood vessel being punctured by the steel needle is very...

Claims

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