Electrical Injuries of the Hand and Upper Extremity.

High-voltage electrical injuries are relatively rare injuries that pose unique challenges to the treating physician, yet the initial management follows well-established life-saving, trauma- and burn-related principles. The upper extremities are involved in most electrical injuries because they are typically the contact points to the voltage source. The amount of current that passes through a specific tissue is inversely proportional to the tissue's intrinsic resistance with electricity predominantly affecting the skeletal muscle secondary to its large volume in the upper extremity. Therefore, cutaneous burns often underestimate the true extent of the injury because most current is through the deep tissues. Emergent surgical exploration is reserved for patients with compartment syndrome; otherwise, initial débridement can be delayed for 24 to 48 hours to allow tissue demarcation. Early rehabilitation, wound coverage, and delayed deformity reconstruction are important concepts in treating electrical injuries.