tailieunhanh - Báo cáo y học: "Variations in branching of the posterior cord of brachial plexus in a Kenyan population"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Variations in branching of the posterior cord of brachial plexus in a Kenyan population. | Muthoka et al. Journal of Brachial Plexus and Peripheral Nerve Injury 2011 6 1 http content 6 1 1 . JOURNAL OF BRACHIAL PLEXUS AND 11 PERIPHERAL NERVE INJURY RESEARCH ARTICLE Open Access Variations in branching of the posterior cord of brachial plexus in a Kenyan population Johnstone M Muthoka Simeon R Sinkeet Swaleh H Shahbal Ludia C Matakwa and Julius A Ogeng o Abstract Background Variations in the branching of posterior cord are important during surgical approaches to the axilla and upper arm administration of anesthetic blocks interpreting effects of nervous compressions and in repair of plexus injuries. The patterns of branching show population differences. Data from the African population is scarce. Objective To describe the branching pattern of the posterior cord in a Kenyan population. Materials and methods Seventy-five brachial plexuses from 68 formalin fixed cadavers were explored by gross dissection. Origin and order of branching of the posterior cord was recorded. Representative photographs were then taken using a digital camera Sony Cybershot R W200 Megapixels . Results Only 8 out of 75 posterior cords showed the classical branching pattern. Forty three lower subscapular 8 thoracodorsal and 8 upper subscapular nerves came from the axillary nerve instead of directly from posterior cord. A new finding was that in 4 and in 3 4 the medial cutaneous nerves of the arm and forearm respectively originated from the posterior cord in contrast to their usual origin from the medial cord. Conclusions Majority of posterior cords in studied population display a wide range of variations. Anesthesiologists administering local anesthetic blocks clinicians interpreting effects of nerve injuries of the upper limb and surgeons operating in the axilla should be aware of these patterns to avoid inadvertent injury. A wider study of the branching pattern of infraclavicular brachial plexus is recommended. Background The posterior cord