Self-adaptive angle distraction forceps

Abstract

The invention discloses self-adaptive angle distraction forceps and belongs to the technical field of medical instruments. The self-adaptive angle distraction forceps is in the form of a pair of torsion type distraction forceps and comprises an upper forceps body and a lower forceps body, the middle parts of the upper forceps body and the lower forceps body are hinged, the front end of the upper forceps body is hinged with a movable distraction piece, and the front end of the lower forceps body is connected with a fixed distraction piece. The self-adaptive angle distraction forceps are used for distraction between vertebral bodies of the spine and are mainly used for distraction of the intervertebral space in an anterior cervical surgery, the distraction angle of the self-adaptive angle distraction forceps can be automatically adjusted along with changes of the included angle between the vertebral bodies, the distraction pieces are more attached to the surfaces of the vertebral bodies, the intervertebral space can be distraction in the maximum range, posterior longitudinal ligaments behind the spine can be conveniently relaxed. The diseased intervertebral disc and the rear diseased posterior longitudinal ligament are cleaned. The distraction pieces and the vertebral body are tightly attached (in surface contact), the pressure on the surface of the vertebral body can be dispersed to the whole contact surface. The situation that the end plate and vertebral body sclerotin are crushed due to pressure concentration at a point is avoided.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a self-adaptive angle stretching forceps for stretching intervertebral bodies of the spine (cervical vertebrae). Background technique [0002] Intervertebral fusion surgery is a common spinal surgery method at present. It includes cleaning the diseased intervertebral disc and posterior ligament to relieve pressure, and implanting fusion cages for bone graft fusion to achieve immediate spinal stability. When cleaning intervertebral lesions, instruments such as spreaders are generally used to open the intervertebral space to facilitate the cleaning of diseased soft tissues, especially the thickened posterior longitudinal ligament, to speed up the operation and improve the safety of the operation. Allow enough space for fusers, etc. [0003] Existing spreaders mainly include caliper type spreaders and connecting rod type parallel spreaders. Common pliers-type spreaders...

AI Technical Summary

Problems solved by technology

The inventor found in the course of the research that, in the process of spreading the vertebral body, the angle of the front-end spreading piece cannot be adjusted, and relatively speaking, both the torsion-type spreading forceps and the parallel-type spreading forceps can only do the same. Point contact of the vertebral body surface, the intervertebral space is distracted by applying pressure to the contact point

When the point contact method is used to spread, it will cause great pressure on the spread point, and the pressure cannot be distributed to other positions of the vertebral body. Not only is it easy to cause the spread distance to be limited by the contact point, it cannot be maximized, and it may even be crushed due to excessive pressure. Upper and lower endplates and vertebral bone

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