System for measuring abduction angle and anteversion angle in total hip arthroplasty

Abstract

The invention relates to a system for measuring an abduction angle and an anteversion angle in total hip arthroplasty. The system comprises a pelvic coronal plane positioning device and a measuring device for measuring the abduction angle and the anteversion angle, wherein the pelvic coronal plane positioning device is used for achieving positioning and stabilization of three points from bilateralanterior superior iliac spines to pubic symphysis of a patient, then the pelvic coronal plane positioning device is removed from the patient's body, and a steinmann pin for positioning on the pelviccoronal plane positioning device is retained on the patient's body, so that the coronal plane of the patient's body is perpendicular to the ground and the longitudinal axis of the body is parallel tothe ground. The system has the advantages that existing artificial empirical physical estimation and cumbersome imaging equipment measurement methods are overcome; the design structure is simple; theoperation is simple; the angles are accurately measured during surgery; the grasp is easy during the surgery; the surgical risk is not increased; no additional economical burden on the patient is generated; wide clinical practicability is realized; the acetabulum anatomical anteversion angle and the anatomical abduction angle of artificial bones can be quickly determined; the accuracy and efficiency of the surgery are improved.

Description

technical field [0001] The invention relates to the technical field of medical supplies, in particular to a system for measuring abduction angles and anteversion angles in total hip arthroplasty. Background technique [0002] Obtaining good acetabular anteversion, acetabular abduction, and femoral anteversion during total hip prosthesis replacement is very important for rebuilding the center of rotation of the hip joint, obtaining good tolerance, and preventing hip impingement and dislocation. [0003] At present, through the analysis of clinical cases, Lewinnek et al. suggested that the specified safe range of acetabular angle is the safe range of imaging abduction angle (40°±10°) and imaging anteversion angle (15°±10°). Some scholars believe that it is not enough to only analyze the angle of the acetabular prosthesis for the stability of the hip joint, and the anteversion angle of the femoral prosthesis should also be considered. The study proposed the concept and range of...

AI Technical Summary

Problems solved by technology

At present, there are physical measurement methods, X-ray two-dimensional image measurement or CT three-dimensional image measurement methods for intraoperative measurement methods. These methods either have high investment costs, cumbersome operations, seriously prolong the operation time, increase the risk of surgery, or in actual operation. Lack of accuracy and stability, and there are certain errors in the results, which will affect the final measurement results

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