Femoral nail mouth opener with three-dimensional positioning function

Abstract

The invention relates to a femoral nail mouth opener with a three-dimensional positioning function, which comprises an identification rod, a handle, a puncture rod, a puncture head and a guide needle;one end of the identification rod is connected with the handle, and the end part of the other end of the identification rod is provided with a positioning needle which is perpendicular to the rod; one end of the puncture rod is detachably connected with the handle, and the other end of the puncture rod obliquely extends towards one side of the other end of the identification rod, and the end partof the other end of the identification rod is connected with an arc-shaped guide needle tube; one side of the guide needle tub, departing from the identification rod, is provided with a guide needlegroove, and one end of the guide needle tube, away from the puncture rod, is provided with an opening, the puncture head is a conical head, the axis of the puncture head is parallel to the identification rod, and the conical bottom end of the puncture head is connected with one end of the puncture rod, away from the guide needle rod; the front end of the guide needle extends into the guide needlegroove and sequentially runs through the guide needle tube and a channel, an angle alpha is formed between the extension line of the axis of the front end of the guide needle and the axis of the rearend of the guide needle, wherein alpha is equal to or greater than 15 degrees and equal to or smaller than 20 degrees; the guide needle and a positioning needle are arranged on the same plane. The device has the advantages of being capable of effectively and rapidly positioning, accurately inserting the guide needle, and flexible and convenient operation.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a femoral intramedullary nail opener with a three-dimensional positioning function. Background technique [0002] At present, the existing gags on the market have the following defects: 1) the puncture rod of the existing gags is too short. In actual operation, the thickness of the local soft tissue of different patients varies greatly. In obese or muscular patients, the tissue is thicker In some cases, it is difficult for the guide needle to enter the body through the opener channel; [0003] 2) The channel of the existing opener is a straight channel, and the guide pin passes through the channel in a straight line. However, the end of the intramedullary nail from the entrance of the greater trochanter has a valgus angle of about 6 degrees, that is, the proximal channel of the guide wire is arc-shaped. During the actual operation of the operation, the guide wire can...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing gags on the market have the following defects: 1) the puncture rod of the existing gags is too short. In actual operation, the thickness of the local soft tissue of different patients varies greatly. In obese or muscular patients, the tissue is thicker In some cases, it is difficult for the guide needle to enter the body through the opener channel;

In most primary hospitals, there is no G-arm X-ray fluoroscopy machine that can see the front and side views at the same time. It is often necessary to adjust the C-arm X-ray fluoroscopy machine several times. location, costing a lot of surgery and radiation exposure time

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