CN2278438Y - Micronervus retractor - Google Patents

Abstract

The utility model relates to a surgical instrument, particularly a nerve retractor used for separating the implication between nerves and surrounding tissues during operation. A circular arc plate is formed by the draw open end, the transitional section and the hand-hold end which change transversely and continuously from narrow to wide. The draw open end is a circular arc end head, and simultaneously, the surfaces of the draw open end, the transitional section and the hand-hold end are grey black without reflecting light. Thereby, the nerves can be safely drawn open and the operation can not be affected by the operation light.

Description

Micro-nerve retractor

This utility model relates to a kind of operation tool, mainly is meant to retract neural and surrounding tissue in the operation to appear the nerve retractor of operating field.

As everyone knows, in the microneurosurgery operation, because operating field is narrow and small, the position is dark, dissects complexity again, and the routine operation apparatus is difficult to retract nervous tissue, and is more roomy as common brain spatula, and can't appear narrow and small deep regionals such as spikes portion, brain stem, spinal cord inside.

At present, often retract nervous tissue with instruments such as little detacher, tweezers, little handle of a knife, little drag hooks, this class instrument is nonelastic first can not be crooked, damage nerve easily and influence appearing of operating field, second the surface of this class instrument all is silvery white reflective surface (as: a rustless steel instrument), under the light-illuminating of operation, influence retracts neural action.

In view of this, the purpose of this utility model provides a kind of micro-nerve retractor, can retract nerve safely, again not because of the operation of operating lamp influence of light.

The purpose of this utility model be achieved in that it be laterally from narrow to wide continually varying retract the elasticity arc plate that end, changeover portion and handheld terminal form, and retract end and be the circular arc termination.

Above-mentioned end, changeover portion and the handheld terminal outer surface of retracting all is provided with not reflector layer of grey black.

Above-mentioned handheld terminal is the circular arc termination.

Above-mentioned end, changeover portion and the handheld terminal of retracting is all holistic grey black Ti-Ni alloy plate.

Owing to adopt such scheme: retract neural safe and reliablely, not influenced by light.

Below in conjunction with drawings and Examples this utility model is further specified.

The horizontal sketch map of Fig. 1 this utility model exemplary embodiments;

The A-A generalized section of Fig. 2 this utility model exemplary embodiments Fig. 1.

Among the figure: 1, retract end 2, changeover portion 3, handheld terminal

The retractor of present embodiment is the arc thin elastic plate that the surface is grey black, as: grey black Ti-Ni alloy plate, it be laterally from narrow to wide continually varying retract end 1 changeover portion 2 and handheld terminal 3 three parts and become a trapezoidal arc, wherein retract end 1 and handheld terminal 3 and be all the circular arc termination, retract the arc diameter 2-6mm of end 1, to adapt to the needs that operating field varies in size, prevent the nerve of damaging, the about 2cm of the arc diameter of handheld terminal 3 grips so that be suitable for finger.Changeover portion 2 trapezoidal arcuation thin plates with the good springiness up and down that keeps narrow end (under same vertical outward force, distortion is big), make the human nerve of desiring to retract can damaged.In addition, this retractor is except that making with grey black Ti-Ni alloy plate, and after also available other elastic plate was made, the surface was painted and is coated with not reflector layer of grey black, and the light of houselights in the operation is played Absorption, and does not produce reflectively, has influence on the operation of operation.

The operation of present embodiment and operation principle:

Finger grips the handheld terminal 3 of retractor, affect the intravital nerve of people from bottom to top, the nerve that is affected is subjected to involving of tissue such as muscle, blood vessel on every side, the inner pulling force that keeps involving state that exists, stoping to retract holds 1 upwards to affect, has better elastic (suitable cantilever beam-ends owing to retract end 1, be again the narrow head of elasticity), not easy damaged or the disconnection of nerve that is affected, along with handheld terminal 3 repeatedly affects from bottom to top, just can reach safely and separate with surrounding tissue, so that proceed operation neural.

Claims (4)

1, a kind of micro-nerve retractor is characterized in that: it be laterally from narrow to wide continually varying retract the elasticity arc plate that end (1), changeover portion (2) and handheld terminal (3) form, and to retract end (1) be the circular arc termination.

2, by the described micro-nerve retractor of claim 1, it is characterized in that: above-mentioned end (1), changeover portion (2) and handheld terminal (3) outer surface of retracting all is provided with not reflector layer of grey black.

3, by the described micro-nerve retractor of claim 1, it is characterized in that: above-mentioned handheld terminal (3) is the circular arc termination.

4, by the described micro-nerve retractor of claim 1, it is characterized in that: above-mentioned end (1), changeover portion (2) and the handheld terminal (3) of retracting is all holistic grey black Ti-Ni alloy plate.

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