Expandable percutaneous puncture needle

Abstract

The invention discloses an expandable percutaneous puncture needle and belongs to the technical field of medical instruments. The expandable percutaneous puncture needle comprises a needle core and a needle cylinder, the needle core is a solid needle, the needle cylinder wraps the periphery of the needle core, the needle core is a cylinder, the diameter of an inner hole of the needle cylinder is equal to the diameter of an outer ring of the needle core, tooth pieces are symmetrically arranged on the two sides of the needle core, each tooth piece is in a triangular prism shape, the needle cylinder is composed of two semicircular cylinder walls, the tooth pieces penetrate through a gap of the needle cylinder, a part of the tooth pieces are exposed out of the needle cylinder, the range of the tooth pieces in sclerotin is expanded when the needle core is rotated through the tooth pieces arranged on the needle core, a connection driving mechanism drives two cylinder walls to be separated from each other to achieve the same outer diameter as a conventional dilation cannula sheath, the puncture needle is expanded, a dilation cannula is replaced, the insertion process of a guide needle and the dilation cannula is omitted, surgical operation is simpler, more convenient and safer, surgical difficulty and risk are reduced, and pain and tissue damage caused by secondary insertion of the cannula to a patient are reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an expandable percutaneous puncture needle. Background technique [0002] Osteoporosis is a common disease in the elderly, characterized by decreased bone mass, decreased bone strength, and destruction of bone microstructure. Fractures of the extremities and thoracolumbar spine usually occur after daily weight-bearing, activities, and falls. With the advent of an aging society, the elderly account for an increasing proportion of the population, and the incidence of thoracolumbar osteoporotic fractures is increasing year by year. Percutaneous vertebroplasty (PVP) is currently the first choice and widely used minimally invasive surgical technique for the treatment of thoracolumbar osteoporotic fractures. In PVP surgery, a percutaneous puncture needle is used to puncture through the skin into the damaged vertebral body, and then a cannula is placed and a balloon is expanded...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an expandable percutaneous puncture needle to solve the technical problem that the traditional PVP operation needs to insert the cannula twice and the guide wire once, and let the patient bear the pain of inserting the cannula into the injured vertebra twice.

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