A new geometrical method (BMCRI Method) for measuring cup anteversion after total hip replacement
Journal Title: International Journal of Orthopaedics Sciences - Year 2017, Vol 3, Issue 3
Abstract
Back ground: In total hip replacement the cup placement is critical. Orientation is determined by anteversion and abduction. We have devised a simple geometrical method to calculate anteversion using simple instruments which does not require complicated conversion tables, scientific calculators, trigonometric tables and special x ray equipment. Objectives: The aim of study is to evaluate the new method in terms of reliability and validity in comparison with other commonly used radiological methods against CT evaluation. Methodology: In 30 hips of 25 consecutive patients, 13 females and 12 males who underwent primary total hip replacement in our institution, the component version in our method was calculated and compared with CT evaluation of angles. The intra and inter observer reliability were assessed. Results: Average CT measurement was 23.28 for anteversion.We found our method had good correlation with CT calculation with average variability of +/_ 3.91380 in planar anteversionand CT methods had excellent intra and inter observer reliability (C.I. = 0.884 to 0.947&0.866 to 0.963). Conclusion: Our method is accurate in comparison with CT (P value>0.05), which does not need any reference tables, conversion tables, scientific calculators, multiple radiation exposures and not time consuming.
Authors and Affiliations
Dr. Manjunath KS, Dr. Gopalakrishna KG, Dr. Hemanth HP
Keywords
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- EP ID EP498745
- DOI 10.22271/ortho.2017.v3.i3f.67
- Views 131
- Downloads 0
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