Functional outcome and complication following THA through MD
The purpose of this study was to identify characteristics of the lateral femoral cutaneous nerve (LFCN) patterns representing an Asian hip, which would aid to provide the most appropriate incision of modified direct anterior approach (MDAA) for total hip arthroplasty (THA), and to identify the clinical outcome and complications following THA through MDAA correlated with cadaveric hip in the Asian population.

The clinical phase identified 32 patients who underwent THA because of late-stage osteoarthritis of the hip. The anterolateral skin numbness was measured along tensor fascia lata between 2 weeks until 2 years. The functional outcome assessed by Harris Hip Score (HHS) and complications were evaluated in all patients.

Results:
--The characteristics of the LFCN from cadaveric study was predominantly in sartorius type followed by posterior type, fan type, and variant type.

--The clinical phase demonstrated that 23 patients had no numbness while 9 patients came with numbness after undergoing THA through the MDAA.

--Finally, a small area of skin numbness remained in only 3 patients at 2 years follow-up.

--Additionally, there was no significant difference in functional score at 2 years follow-up between those with LFCN injury and those without LFCN injury.

There were four different types of LFCNs. The modified direct anterior technique is an alternative to THA that results in less skin numbness and a faster recovery time without hip dislocation, abductor weakness, or significant nerve complications. With and without LFCN damage, functional outcomes were comparable.

Source: https://josr-online.biomedcentral.com/articles/10.1186/s13018-021-02661-6
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