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Journal of Bone and Joint Surgery - British Volume, Vol 90-B, Issue 7,
852-857.
doi: 10.1302/0301-620X.90B7.20125 Copyright © 2008 by British Editorial Society of Bone and Joint Surgery Elevated intraosseous pressure in the intertrochanteric region is associated with poorer results in osteonecrosis of the femoral head treated by multiple drillingM. S. Lee, MD, PhD, Orthopaedic Surgeon1; P.-H. Hsieh, MD, Orthopaedic Surgeon1; Y.-H. Chang, MD, Orthopaedic Surgeon1; Y.-S. Chan, MD, Orthopaedic Surgeon1; S. Agrawal, MD, Clinical Fellow1; and S. W. N. Ueng, MD, Orthopaedic Surgeon11 Department of Orthopaedics Chang Gung Memorial Hospital, 5, Fu-Hsin Street, Kweishan 333, Taoyuan, Taiwan. Correspondence should be sent to Dr M. S. Lee; e-mail: bone{at}doctor.com
Multiple drilling is reported to be an effective treatment for osteonecrosis of the head of femur, but its effect on intra-osseous pressure has not been described. We undertook multiple drilling and recorded the intra-osseous pressure in 75 osteonecrotic hips in 60 patients with a mean age of 42 years (19 to 67). At a mean follow-up of 37.1 months (24 to 60), 42 hips (56%) had a clinically successful outcome. The procedure was effective in reducing the mean intra-osseous pressure from 57 mmHg (SD 22) to 16 mmHg (SD 9). Hips with a successful outcome had a mean pressure of 26 mmHg (SD 19). It was less effective in preventing progression of osteonecrosis in hips with considerable involvement and in those with a high intra-osseous pressure in the intertrochanteric region (mean 45 mmHg (SD 25)). This study is not able to answer whether a return of the intra-osseous pressure to normal levels is required for satisfactory healing.
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