Percutaneous minimally invasive ilium extractor

Abstract

The invention discloses a percutaneous minimally invasive ilium extractor. The extractor comprises a guide needle and further comprises an expansion cannula with the inner diameter larger than the diameter of the guide needle, an outer cannula with the inner diameter larger than the outer diameter of the expansion cannula, and a bone extraction tube with the outer diameter smaller than the inner diameter of the outer cannula, wherein a plurality of first sawteeth are arranged on the end face of one end of the bone extraction tube and are oblique teeth; a knife edge and a knife back are arranged on the two opposite sides of each first sawtooth respectively; the length of each knife edge is larger than that of the corresponding knife back; and the thickness of the outer end of each knife edge is larger than that of the inner end of the knife edge. According to the percutaneous minimally invasive ilium extractor, a skin incision is small, a minimally invasive surgery is achieved, the operation is easy, the bone extracting efficiency is greatly improved, the injuries to a patient due to the surgery are reduced, the risk that the patient is further injured due to the fact that the tail end of the ilium is broken is reduced, and the iatrogenic injuries to the patient are reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a percutaneous minimally invasive iliac crest extractor. Background technique [0002] Autologous bone grafting is the gold standard for bone fusion. For patients who need bone transplantation, the patient's own ilium is usually taken out and crushed before transplantation. The existing ilium extraction method is to make an incision on the patient's hip and expand the incision, separate the periosteum with an electric knife, then extend the osteotome into the incision and chisel a cuboid bone block on the iliac wing. The removed ilium is mashed and set aside. However, in traditional iliac bone extraction, there will be complications such as lateral femoral cutaneous nerve injury, subcutaneous hematoma infection, large trauma, iliac bone fracture, severe postoperative pain, and unsightly incision. For these problems, a percutaneous minimally invasive iliac crest ext...

AI Technical Summary

Problems solved by technology

However, in traditional iliac bone extraction, there will be complications such as lateral femoral cutaneous nerve injury, subcutaneous hematoma infection, large trauma, iliac bone fracture, severe postoperative pain, and unsightly incision. For these problems, design a percutaneous minimally invasive iliac crest extractor

Existing bone drills are usually tubular, and one end of the bone drill has serrations for cutting bones. However, during the process of taking out the ilium, the cut part of the ilium is still connected to other bones and is not easy to break, resulting in The time of bone surgery is prolonged, and the patient may suffer more serious injuries during the breaking process. Therefore, a percutaneous minimally invasive iliac crest extractor is needed to facilitate the removal of the cut part of the ilium and the bone during minimally invasive bone extraction. Separation of other bones to increase the efficiency of bone harvesting and reduce the risk of further injury to the patient

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