With globally increasing war, conflicts and terrorism acts, blast or bullet limb injuries are seen more often and present a surgical challenge.The amount of tissue damage and the injury severity of gunshot injuries are due to the energy transmitted by the bullets or projectiles, depending mainly on their velocity. Therefore, the injuries are not divided any more, as in the past, to "high-and low-velocity injury" but to "a high-or low-energy injury."Blast injuries are also energy related and mainly dependent upon the distance from the blast, the energy released from the bombing device, the media (air or water) and the environment in which the blast takes place (close or open). Although the injury may look superficial, it might be much worse and the external wound is sometimes only the tip of the iceberg.
Bullet and Projectile BallisticsProjectile or bullet injuries may be classified as "lowenergy" or "high-energy," which describe the amount of damage to the tissues. The factor that most affects the injury severity is the amount and the efficiency of energy transfer [1][2][3][4][5], which is mostly related to kinetic energy that is presented by the equation2 ] (M -mass; V -velocity)" in a bullet that does not "waste" energy on deforming. Other suggested theories are the momentum theory expressed as "Mass × Velocity" and the power theory related to "Mass × Velocity 3 " [6]. Ballistic wounds can be classified, according to the amount of energy causing them, into: high energy (>1,000 J); medium energy (250-1,000 J); low energy (<250 J) [7]. For example, this is the basic principle of successful open fracture classification system as described by GustiloAnderson [8,9].The energy importance is represented by most shot wound classifications, such as the Red Cross classification for war injury [10] that emphasizes wound severity in terms of tissue damage and injuries to specific anatomic structures. The injury is rated according to the size of the entry and exit wounds. It also categorizes the presence of a cavity, a fracture, or an injured vital structure and the presence or absence of metallic bodies [10]. The modified Red Cross classification for civilian injuries, [11] which incorporates the ballistic and clinical aspects of gunshot injuries in civilians, is based on energy dissipation, vital structures injured, type of wound created, severity of bony injury, degree of contamination, and the modified Gustilo-Anderson open fracture classification system in which lowvelocity gunshot wounds are designated as Grade I or Grade II, based on the size of the skin wound and highvelocity gunshot injuries are designated as Grade III injuries, regardless of wound size [12].The cascade of a shot starts with pulling the trigger. This leads to the quick expansion of gas that may reach a temperature of over 2,800°C. This produces