The most common complication of Supracondylar fracture :
**Core Concept**
Supracondylar fractures of the humerus are a common type of elbow fracture in children, often resulting from a fall onto an outstretched hand. The fracture occurs above the condyles of the humerus, which can lead to various complications due to the fracture's proximity to the brachial artery and nerve structures.
**Why the Correct Answer is Right**
The most common complication of supracondylar fractures is **median nerve injury**. This occurs due to the close proximity of the median nerve to the fracture site, which can lead to nerve compression or damage. The median nerve supplies sensation to the palmar aspect of the thumb, index, middle finger, and radial half of the ring finger, as well as motor function to the thenar muscles. In the context of a supracondylar fracture, median nerve injury can result in weakness or paralysis of the affected hand muscles.
**Why Each Wrong Option is Incorrect**
**Option A:** Myocardial infarction is not a direct complication of supracondylar fractures.
**Option B:** While compartment syndrome can occur in any fracture, it is not the most common complication of supracondylar fractures.
**Option C:** Brachial artery injury is a potential complication, but it is less common than median nerve injury.
**Clinical Pearl / High-Yield Fact**
In children with supracondylar fractures, median nerve injury is more likely to occur if the fracture is displaced or if there is a significant degree of swelling in the affected arm.
**Correct Answer:** C. Brachial artery injury