Longitudinal bending composite ultrasonic vibration reciprocating sternum saw

Abstract

The invention discloses a longitudinal-bending composite ultrasonic vibration reciprocating sternum saw which comprises a saw blade, a saw blade chuck, a sternum saw body and a sternum saw tail. The sternum saw tail part comprises an active driving shaft, and the active driving shaft can rotate under the action of a motor; the sternum saw body comprises an ultrasonic vibrator device and a reciprocating motion device, the reciprocating motion device comprises a sleeve, a driving bevel gear, a driven bevel gear, an eccentric shaft and a connecting plate, and the driving bevel gear is connected to a driving shaft and can synchronously rotate with the driving shaft to drive the driven bevel gear to rotate; the eccentric shaft is connected to the driven bevel gear and can rotate around the axis of the driven bevel gear along with the driven bevel gear, one end of the connecting plate is rotationally connected with the eccentric shaft, and the other end of the connecting plate is rotationally connected with the sleeve. The ultrasonic vibrator device comprises a transducer body and an amplitude-change pole, and the amplitude-change pole is connected with the saw blade chuck and the sleeve. The large-bone-mass sawing knife can be used for a large-bone-mass sawing operation, cutting damage is reduced, meanwhile, cutting efficiency can be improved, and postoperative recovery time of a patient is shortened.

Description

technical field [0001] The invention relates to an orthopedic cutting instrument for sternal sawing, in particular to a reciprocating sternal saw with longitudinal bending compound ultrasonic vibration. Background technique [0002] Sternal sawing is an indispensable key procedure in performing sternotomy, and is also an indispensable step in performing, for example, cardiac surgery. During the sternotomy operation, the doctor usually needs to saw the sternum. At this time, the doctor uses an orthopedic cutting instrument (ie, a sternum saw) to cut and remove the sternum for subsequent operations. [0003] In the process of sawing the sternum, the reciprocating frequency of the sternum saw is 0-20000 times / min, and the sawing stroke of the sternum saw is about 4mm. When the sawing frequency is relatively high, it is easy to cause excessive cutting damage, which will damage the sternum for a long time. Cause irreversible damage, and seriously affect patient comfort and posto...

AI Technical Summary

Problems solved by technology

However, ultrasonic osteotome is currently only suitable for small-scale or bone tissue cutting operations with a thickness of less than 3mm, such as minimally invasive spine surgery, minimally invasive or a small amount of bone tissue resection in oral and maxillofacial surgery, for large bone volume, large bone tissue such as the sternum The range of bone tissue cutting is not applicable, and the ultrasonic osteotome has disadvantages such as low transmission efficiency and poor stability, and it is not mature enough in the current actual clinical application

However, the current traditional sternal saw is likely to cause excessive cutting damage, seriously affecting patient comfort and postoperative recovery

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