A kind of two-way stretching device for cervical spine

Abstract

The invention discloses a bidirectional cervical vertebrae dilation apparatus, which comprises a fixed dilation arm, a movable dilation arm and a gear rack, wherein the fixed dilation arm is fixedly connected to the gear rack; the movable dilation arm comprises a gear which is meshed with the gear rack, a guide sleeve which sleeves the gear rack and is used for accommodating the gear rack and a handle for operating the gear to rotate; the movable dilation arm further comprises a bidirectional limiting mechanism; the bidirectional limiting mechanism comprises a first pawl and a second pawl; and the fixed ends of the first pawl and the second pawl are connected to the guide sleeve at one side of the gear. With the application of the bidirectional cervical vertebrae dilation apparatus disclosed by the invention, a dilation distance can be adjusted in a bidirectional mode, so that adjusting precision on the dilation distance is enhanced; and moreover, the dilation apparatus not only can achieve dilation but also can conduct inward pressurizing.

Description

technical field [0001] The invention relates to the field of surgical medical instruments, in particular to a cervical vertebra bidirectional distraction device. Background technique [0002] The anterior cervical spreader is a medical device commonly used in anterior cervical surgery. Its function is to spread the soft tissues such as skin and muscles and the two vertebral bodies during the operation, so as to expand the soft tissues such as skin and muscles and the intervertebral space, which is convenient. Surgery is performed. [0003] The patent application whose publication number is CN 1838915A discloses a bone expander, which can drive pins respectively inserted in two tubular pin seats and connected with the bone to be expanded through a parallel guide device, so that the two bones to be expanded Relative movement, and then achieve the purpose of bone expansion. [0004] However, the existing anterior cervical distractors can only be distracted in one direction, a...

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Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, in order to solve the technical problem that the spreader in the prior art can only be opened in one direction and cannot accurately adjust the space between the spreaders, the present invention provides a cervical vertebrae suitable for minimally invasive surgery. two-way spreader

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