Titanium rod curvature protractor in thoracic vertebra or lumbar vertebra operation

Abstract

The invention relates to a titanium rod curvature protractor in thoracic vertebra or lumbar vertebra operation. The titanium rod curvature protractor comprises a first part, a second part and a scalerotary disc; the first part comprises a first transverse arm and a first vertical arm; the first transverse arm is provided with a disc chute extending along the length direction of the first transverse arm; the first vertical arm is provided with an auxiliary chute; the second part comprises a second transverse arm and a second vertical arm; the scale rotary disc is fixed at the free end part ofthe second transverse arm through a disc nut; the disc nut penetrates through the disc chute and fixes the scale rotary disc at a proper position in the disc chute; the second vertical arm is providedwith a fixing component chute; a titanium rod clamping component is arranged in the auxiliary chute; a titanium rod fixing component is arranged in the fixing component chute; the titanium rod fixingcomponent can slide along the fixing component chute and can be fixed at a proper position in the fixing component chute; the titanium rod is fixed between the titanium rod clamping component and thetitanium rod fixing component; and the bending angle of the titanium rod is read out through scales on the scale rotary disc.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a titanium rod curvature protractor for thoracolumbar surgery. Background technique [0002] The curvature of lumbar lordosis (LL) is closely related to the postoperative quality of life of patients with lumbar degenerative diseases and deformities, which has been confirmed in many studies. The appropriate degree of lumbar lordosis reconstruction has become a research hotspot in the past. The pelvic incidence (pelvic incidence, PI) was proposed by Duval-Beaupère et al. in 1992, which represents the sagittal shape of the pelvis and remains unchanged in adulthood. There is a close correlation between the pelvic incidence angle PI and the curvature LL of lumbar lordosis. Western scholar Duval-Beaupère proposed a simplified approximate correspondence of LL=PI±9°, which is used as a reference for intraoperative lumbar lordosis reconstruction. , Effective features, widely...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the pre-bending curvature of the titanium rod during the operation cannot be accurately measured. It can only be estimated by visual experience. Whether it has reached the expected reconstruction range of the operation can only be verified by the postoperative measurement results.

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