Cavity opening instrument

Abstract

The invention relates to a cavity opening instrument comprising a handle component and a moving component. The handle component comprises a regulation mechanism; the moving component comprises a cavity opening part, a connecting part, a regulating shaft and a transmission shaft. The near end of the regulating shaft is fixed to the near end of the handle component, the far end of the regulating shaft is connected to the near end of the cavity opening part flexibly, the far end of the connecting part is provided with a spherical joint, the near end of the cavity opening part is provided with a spherical concave surface, which is connected to the spherical joint in a matched manner, the near end of the connecting part is connected to the far end of the transmission shaft fixedly, the near end of the transmission shaft is connected to the handle component fixedly, and the transmission shaft sleeves the regulating shaft; the regulation mechanism is operated to drive the regulating shaft to rotate axially in a reciprocating manner through the transmission shaft, and to drive the cavity opening part to rotate corresponding to the connecting part. The cavity opening instrument has the advantages that the rotating angle of the cavity opening part can be controlled accurately, self-locking can be implemented, and the instrument can be operated and controlled conveniently.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to an open-cavity instrument. Background technique [0002] Vertebral compression fractures caused by osteoporosis are common in the elderly, and with the aging of the population, the number of patients suffering from this disease is also increasing rapidly, and percutaneous vertebroplasty (PVP) or percutaneous vertebroplasty Kyphoplasty (PKP) has played an irreplaceable role in it. [0003] At present, there are two types of open-cavity instruments used in vertebroplasty: straight and curved. In the patent CN201879801U, an expansion cone drill is disclosed. The expansion cone drill is straight and needs to be used in conjunction with the bilateral puncture of traditional vertebroplasty instruments during the operation; Angle cavity-opening instruments can be used in conjunction with curved-angle instruments, but the size of the channel opened by it is limited by the...

AI Technical Summary

Problems solved by technology

In the patent CN201879801U, an expansion cone drill is disclosed. The expansion cone drill is straight and needs to be used in conjunction with the bilateral puncture of traditional vertebroplasty instruments during the operation; Angle cavity-opening instruments can be used in conjunction with curved-angle instruments, but the size of the channel opened by it is limited by the size of the grinding head, and the diameter is generally relatively small. In addition, in US2010 / 0268234, a cavity-opening tool is disclosed. The used The angle adjustment structure of the cutter head is directly clamped and embedded on the cutter head through the adjustment shaft, and then the control of the angle of the cutter head is realized through the elasticity of the transmission shaft itself. In the case of returning, the purpose of opening the mouth cannot be achieved

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