Growth Plate Injuries ,Overview- Everything You Need To Know - Dr. Nabil Ebraheim скачать в хорошем качестве

Growth Plate Injuries ,Overview- Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes growth plate injuries. The growth plates produce longitudinal growth of the bone. Growth plates are divided into layers or zones. •Reserve zone: the reserve zone is inactive and allows for matrix production, is used for storage and have low oxygen tension. It has the highest type II collagen content. •Proliferating zone: cellular proliferation and longitudinal growth. Has a high metabolic rate. Has the highest rate of extracellular matrix production. Has the highest oxygen tension. •Hypertrophic zone: maturation, degeneration and provisional calcification. The cartilage cells increase 5-10 times in size. There is degeneration of the cells and the matrix is prepared for calcification. Low oxygen tension, low vascularity, chondrocytes die and calcium is released for matrix calcification. It facilitates calcium deposition. The majority of growth plates injuries occur in the hypertrophic zone. This zone is weak and weaker than the ligaments and provides a cleavage pathway for the fracture. Several classification systems of growth plate fractures have been developed and most widely used is the Salter-Harris classification. •Type I: fracture through the growth plate. There may be no obvious displacement. •Type II: fracture through the growth plate and the metaphysis, sparing the epiphysis. •Type III: fracture through growth plate and epiphysis sparing the metaphysis. •Type IV: fracture through all three elements, the growth plate, the metaphysis and the epiphysis. •Type V: compression fracture of the growth plate. Salter-Harris type I & type II have a better prognosis than types III & IV. Salter-Harris type I & II in general may not require surgery.Salter-Harris type III & IV is an intra-articular joint fracture that usually requires surgery. The reduction has to be anatomic and the prognosis is fair.type V is rare with a poor prognosis. Physeal arrest 1-Total growth plate arrest: the limb length decreases substantially. 2-Central: partial cessation of longitudinal growth. Progressive shortening. 3-Peripheral: leads to angular deformity and decreased length: corrective osteotomy. Child abuse and growth plate injuries: usually you will find multiple fractures in different stages of healing. You will find physeal fracture or separation such as in the distal humerus, trans epiphyseal distal humeral fracture. A corner fracture is a traction/rotation injury pathognomonic of child abuse. 15% of all fractures in children involve the growth plate. These growth plate injuries occur more distal than proximal. Any fracture that involves the growth plate may create deformity and limb inequality. Become a friend on facebook:   / drebraheim   Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC Background music provided as a free download from YouTube Audio Library. Song Title: Every Step