Casing pipe type dura mater dissecting device

Abstract

The invention relates to a casing pipe type dura mater dissecting device, which comprises a guiding pipe and a dissector capable of being sleeved inside the guiding pipe, wherein the guiding pipe is a hollow arced pipe with two open ends, the cross section of the guiding pipe is of a bow shape, the dissector is arced under a nature state, the cross section of the dissector is of a bow shape, the dissector is provided with an external dissector shell and an internal dissector inner core, and the dissector is provided with the dissector shell with at least one closed end so as to form a dissecting end. The casing pipe type dura mater dissecting device has the advantages that: the dissector can go into a path along a specific path under the guidance of the guiding pipe so as to effectively prevent deviation and unnecessary skull and dura mater separation, the casing pipe type dura mater dissecting device is high in dissecting efficiency, low in damage rate, simple in structure and simple and convenient to operate, is suitable for the skull and dura mater separation of bone holes of different spacings, and can be used for effectively preventing a milling cutter from breaking dura mater or venous sinus to increase the safety of craniotomy.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a cannulated dura mater stripper. Background technique [0002] The cross-sectional anatomy of the head shows that the lower part of the human skull is dura mater, cerebral arachnoid mater, and pia mater, among which the dura mater is a thick and tough double-layer membrane, and the outer layer of the dura mater is loosely combined with the skull in young and middle-aged people. , and the dura mater and skull of elderly patients are closely adhered. Some parts between the two layers of the dura mater are surrounded by the dural venous sinus, which is the channel that drains the blood in the brain to the internal jugular vein, and the dural venous sinus wall has no smooth muscle and cannot contract. If it is injured, the bleeding will be difficult to stop, and extreme care must be taken during craniotomy to avoid damaging the dural venous sinus and causing massive ble...

AI Technical Summary

Problems solved by technology

But this utility model is only applicable to venous sinus craniotomy when the distance between two bone holes is very small, and can not be used in general craniotomy to prevent milling cutter from cutting dura mater or dura mater venous sinus, because in general craniotomy , the bone hole spacing is usually large, if the utility model is used to avoid cutting the dura mater by increasing the number of bone holes and reducing the bone hole spacing, it will increase the pain of the patient and prolong the operation time, which is also not advisable

Therefore, there is an urgent need for a device that can be used in general craniotomy to peel off the adhesion of the dura mater and the inner surface of the skull to form a milling cutter walking gap and avoid the milling cutter from injuring the dura mater and dural venous sinus. The device has not been reported yet

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