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Limb length, offset controlled by mechanical measurement device
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The length and offset optimization device improves control of limb length and offset during total hip arthroplasty on a posterolateral approach, according to results of this study.
From July 2009 to January 2010, investigators studied 32 patients who had total hip arthroplasties with a length and offset optimization device (LOOD) and 26 patients without the device. The intraoperative target was to restore individual anatomy. Preoperative and postoperative AP pelvic weight-bearing views in upright posture, feet aligned, with comparison to preoperative LOOD data was the basis for radiographic analysis.
In an analysis of preoperative and postoperative radiographs, the researchers found a mean length difference of 2.31 mm with the LOOD device and 6.96 mm without the device. Researchers also found a mean preoperative and postoperative offset difference of 3.96 mm with LOOD and 10.16 mm without the device. Change in length for preoperative and radiographic measurements using the LOOD did not significantly differ; however, measurements for offset differed significantly.
Disclosure: The researchers report no relevant financial disclosures.
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Barbier O. Orthop Traumatol Surg Res. 2012;98:398-404. doi: 10.1016/j.otsr.2012.02.004
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