tailieunhanh - báo cáo hóa học:" Effects of hip joint position and intra-capsular volume on hip joint intra-capsular pressure: a human cadaveric model"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Effects of hip joint position and intra-capsular volume on hip joint intra-capsular pressure: a human cadaveric model | Journal of Orthopaedic Surgery and Research BioMed Central Open Access Research article Effects of hip joint position and intra-capsular volume on hip joint intra-capsular pressure a human cadaveric model Chi-Hung Yen1 Hon-Bong Leung 2 and Paul Yun-Tin Tse1 Address Department of Orthopaedics and Traumatology Kwong Wah Hospital 25 Waterloo Road Yaumatei The Hong Kong Special Administrative Region and 2Department of Orthopaedics and Traumatology Queen Mary Hospital Pokfulam The Hong Kong Special Administrative Region Email Chi-Hung Yen - chihungyenyen@ Hon-Bong Leung - adrianleunghb@ Paul Yun-Tin Tse - pyttse@ Corresponding author Published 2 April 2009 Received 14 July 2008 Journal of Orthopaedic Surgery and Research 2009 4 8 doi 1749-799X-4-8 Accepted 2 April 2009 This article is available from http content 4 1 8 2009 Yen et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Increase in hip intra-capsular pressure has been implicated in various hip pathologies such as avascular necrosis complicating undisplaced femoral neck fracture. Our study aimed at documenting the relationship between intra-capsular volume and pressure in various hip positions. Methods Fifty-two cadaveric hips were studied. An electronic pressure-monitoring catheter recorded the intra-capsular hip pressure after each instillation of 2 ml of normal saline and in six hip positions. Results In neutral hip position the control position for investigation intra-capsular pressure remained unchanged when its content was below 10 ml. Thereafter it increased exponentially. When the intra-capsular volume was 12 ml full abduction produced a increase p of the intra-capsular