Abstract
We measured blood flow of the osteotomized acetabulum during curved periacetabular osteotomy (CPO), which is our modification of the Bernese periacetabular osteotomy derived by Ganz et al. Twelve female and one male patients, who had residual hip dysplasia, underwent CPO. The average age at the time of operation was 36 years old (16-59). At operation, the bone blood flow at the acetabulum was measured before osteotomy and after redirection with a laser flowmeter. The bone blood flow at the acetabulum averaged 3.2±1.6 FLOW (arbitrary units) before osteotomy. After redirection, the bone blood flow at the acetabulum averaged 2.4±1.3 FLOW. Consequently, the CPO caused decrease of the bone blood flow at the acetabulum by 18.7±31.7%. The CPO did not significantly change the bone blood flow of the transferred acetabulum. In rotational acetabular osteotomy, collapse and necrosis of the transferred acetabulum has been reported as a disastrous complication. In CPO, the external portion of the ilium can be left undissected. Bone union and relief of pain were obtained in all hips.
