A medical adjustable curved tissue removal instrument

Abstract

The invention relates to an adjustable-bending tissue removal instrument for medical use. The tissue removal instrument comprises a tissue removal head, an adjustable-bending unit, a rotating shaft and an adjusting and control straight pipe, wherein the adjustable-bending unit comprises a linear section and a fixed bending part which is made from an elastic material; the linear section is fixedly connected to an adjusting and control handle; the far end of the rotating shaft is connected to the tissue removal head and the near end is provided with a connecting piece; the part of the rotating shaft, located on the fixed bending part, is composed of multiple sections of flexible shafts, and every adjacent two sections of the flexible shafts are connected by virtue of a stress releaser; each of the stress releasers comprises a plurality of connecting units, and the connecting units at two ends of the stress releaser are connected to nearby flexible shafts; movable connection, which is capable of achieving axis transmission rotating motion along the connecting units, is arranged between the adjacent two connecting units; the adjusting and control straight pipe is sleeved outside the adjustable-bending unit; and by operating the adjusting and control handle, the adjusting and control straight pipe is controlled to move in an axial direction. The rotating shaft of the invention is capable of transmitting torque by virtue of the plurality of the stress releasers, so that the alternating stress from bending is eliminated, fatigue breakage in the flexible shafts is avoided and the reliability of the instrument is improved.

Description

technical field [0001] The invention relates to the technical field of spinal canal stenosis decompression instruments, in particular to a medical adjustable bending tissue removal instrument. Background technique [0002] As we grow older, human tissues often proliferate and degenerate, resulting in narrowing of the spinal canal or nerve root canal, resulting in compression of the cauda equina nerve or nerve root, resulting in numbness, pain, and even paralysis in severe cases. During spinal surgery, it is necessary to grind or cut the patient's hyperplastic or degenerated tissue to reduce the compression of the tissue on the nerve, thereby alleviating and eliminating its impact. [0003] In the prior art, such as the international patent application of patent publication number WO 2014 / 041540 A1, a power handle is used to directly drive the grinding head to rotate for grinding, and the working sheath on the outer layer of the drive shaft is an unadjustable fixed curved sha...

AI Technical Summary

Problems solved by technology

[0008] The distal end of this structure is flexible and insufficient in rigidity. When encountering hard tissues, it is difficult for the distal end to maintain its original shape, resulting in poor cutting effect, and may even shake. The safety and effectiveness of the device are poor.

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