You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Humeral supracondylar fracture commonly results in which nerve injury: September 2007 and explain in detail?
Ans. D: Median Nerve Supracondylar humerus fracture: Most common < 10 years, peak age 5-8 years Constitutes 80% of all pediatric distal humerus fractures 2:1 males to female ratio Classificatio: Extension type: Extension type accounts for 90-98% of all supracondylar fractures Flexion type Galand Classification is commonly used to classify extension type of injuries: I: Nondisplaced IIA: displaced, posterior coex intact; rotationally stable, intact posterior coex acts like a hinge IIB: displaced, posterior coex intact; rotationally unstable III: completely displaced, no coical contact, most often a medial periosteal sleeve intact when medially displaced and vice-versa Management: i. Closed Reduction is done for type I and type II fractures. Closed reduction is not attempted in type III fractures. Assessing adequacy of reduction: Jones view: hyperflexion shoot through elbow Baumann's Angle: comparison to uninjured side, difference of more than 5degrees is unacceptable Anterior Humeral Line Type III fracture: Increased swelling and soft tissue injury Proper neurovascular and compament assessment Closed reduction and percutaneous pinning is the management of choice, 2 pins may achieve stability Neurologic Injury: 5-19% of supracondylar farctures More in type III supracondylar fractures Median nerve 52% (especially posteromedial displacement) Radial nerve: 28% Most are neuropraxic injuries Motor Recovery may take 7-12 weeks Sensory recovery may take nearly 6 months