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Supersonic skeleton cutting instrument

A bone and ultrasound technology, applied in the field of surgical medical devices, can solve problems such as failure to reflect the nature of bone tissue, decrease in output amplitude, and changes in no-load performance, and achieve the effects of fine surgery, smooth chip removal, and strong load capacity

Inactive Publication Date: 2005-01-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no-load performance changes under loaded conditions
Moreover, the amplitude ratio or shape factor is only an appearance parameter, which cannot reflect the essence of cutting and destroying bone tissue.
After the ultrasonic vibration system designed according to the maximum no-load amplitude ratio is exposed to a large load, the output amplitude drops sharply, reducing the cutting ability

Method used

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  • Supersonic skeleton cutting instrument
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Embodiment Construction

[0027] A kind of ultrasonic bone cutting instrument designed by the present invention is described in detail as follows in conjunction with embodiment and accompanying drawing:

[0028] An embodiment of an ultrasonic bone cutting instrument designed by the present invention mainly includes two parts: a host and a handle. Composite vibration transducer; the transducer is composed of a group of longitudinally polarized piezoelectric sheets and a group of tangentially polarized piezoelectric sheets, and the host is connected to the transducer through cables; this embodiment also includes a cooling The cooling device is connected with the cooling conduit, and the outlet end of the cooling conduit is arranged at the end of the tool to cool it.

[0029] The signal generator and power amplifier of the host in this embodiment can select existing components and parts according to the required frequency.

[0030] Both the longitudinally polarized piezoelectric sheets and the tangential...

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Abstract

An ultrasonic bone cutting apparatus is composed of a host consisting of signal generator and powre amplifir, and a handle consisting of sequentially connected composite vibration transducers, ampletude changing rod and cutting tool. Said composite vibration transducer consists of a group of longitudinal polarized piezoelectric plates and a group of tangent polarized piezoelectric plates.

Description

technical field [0001] The invention belongs to the field of surgical medical instruments, and is characterized in that it relates to an improved design of an ultrasonic bone cutting instrument. Background technique [0002] There are basically two types of operations related to bone cutting in surgery: one is bone cutting to reach the area where the operation is performed, such as the need to cut the lamina in various spinal operations; the other is various bone tissue plastic surgery. Repair, such as orthopedic orthopedics, facial bone plastic surgery, etc., all these occasions use bone cutting. The cutting methods used in orthopedic clinical operations are mainly traditional methods at present, such as using rongeurs, electric saws, electric drills and pneumatic tools to cut. Electric and pneumatic tools have high efficiency in cutting bone tissue, but there are many negative effects, such as uneven hole surface, cracks and small broken fragments, easy necrosis of bone t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/32A61B17/56
Inventor 周兆英罗晓宁史文勇张毓笠陈颖
Owner TSINGHUA UNIV
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