Infantile Hip Arthroscopy: The Relationship between Neurovascular Anatomy and the Portal Pathway
Cholawish Chanlalit MD*, Tanyawat Saisongcroh MD*, Rattavuth Raksakulkiat MD**, Yingyong Torudom MD*
Affiliation : * Department of Orthopedics, Faculty of Medicine, HRH Princess Maha Chakri Sirindhorn Medical Center, Srinakhrinwirot University, Nakhon Nayok, Thailand ** Department of Orthopedics, Faculty of Medicine, BMA & Vajira Hospital, Bangkok, Thailand
Objective : In the past, studies of hip arthroscopy portal path relate with extra-articular structures were done
in adults. This study was investigated in the infantile group.
Material and Method: 10 hips of fresh infantile cadavers. K-wire diameter 2.4 mm. are representing scope
pathway. Three portals (anterior, anterolateral and posterolateral) in supine position without traction were
chose to used in this study.
Results : One cadaver was female and four were male. The mean age and weight when death occurred was 74
days and the mean weight was 3,584.4 gm. At the anterior portal, the most lateral branch of LFCN was
frequently injured. The average distant of femoral nerve to the K-wire was 11.2(7-14) mm. Transverse branch
of lateral femoral circumflex artery had an average distant 8.5(6-14) mm and the terminal branch could be
identified in four hip and average distance was 1mm. At the anterolateral portal two, greater trochanter were
injuried by K-wire. In the posterolateral portal the average distant from K-wire to sciatic nerve was 13.2 mm.
Conclusion : From this pilot study, the distance of major neurovascular structure as related to hip scope path
is nearly a centimeter on average.
Keywords : Hip arthroscopy, Hip anatomy, Neurovascular anatomy, Infant hip arthroscopy
