Abstract
Purpose: Damage to the infrapatellar branch of the saphenous nerve and subsequent loss of sensation following graft harvest in ACL reconstruction is common. An oblique incision, rather than a vertical incision, has been shown to reduce the incidence and area of sensory loss following graft harvest [1] although the results are not universal. The purpose of this study was to determine if there was a difference in the area of infrapatellar neuritis (IFPN) and quality of life (QOL) between ACL patients that received a vertical – (VI) versus oblique-incision (OI) for hamstring tendon harvest.
Method: An interim analysis of a single-blinded randomized controlled trial (N=100) was conducted. Patients with clinical – and/or MRI-evidence of an ACL tear and no previous injury to the knee or surrounding soft tissues (including skin) were consented. Participants completed an ACL-QOL questionnaire pre-operatively, were randomized intra-operatively, and returned for follow-up at 1.5-, 6-, 12 – and 24-months to trace altered area of skin sensation and complete an ACL-QOL questionnaire. The area of altered skin sensation was quantified with ImageJ (NIH) software. The intention-to-treat principle was applied and a student’s t-test was used for statistical analysis. (p< .05).
Results: An interim analysis of 25 patients with a follow-up of 6 – to 24-mo demonstrated that the VI group (79.1 ± 15.6 cm2) had a greater affected area than the OI group (10.9 ± 3.5 cm2), no difference in ACL-QOL scores was evident.
Conclusion: Based on the difference in morbidity between the two groups, and similar results in a previous study (2), OI incision for graft harvest is recommended.
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