This document discusses firearm injuries and terminology related to forensic medicine. It describes different types of firearms including shotguns and rifled weapons. Shotguns fire multiple pellets while rifled weapons fire a single projectile. The document details the mechanisms of injury from firearms, characteristics of entrance and exit wounds, factors to consider when determining if a firearm injury was from accident, suicide or homicide, and the duties of doctors in cases of firearm injuries and deaths.

1. Firearm Injuries Forensic Medicine Husam Salhab

2. Terminology

5. Shotguns

7. Rifled Weapons Examples: -- Automatic Pistol: self-loading weapon, where shells are put into firing position by a gas operated delivery system. -- Revolver: bullets are brought into position via a rotating cylinder -- Rifle: a long barreled sporting or military weapon

12. Contact Wounds cont. Summery -Wounds are circular -There may be muzzle mark -There may be a slight local burning to the skin & hair -Redness from CO gases

13. Contact Wounds cont. Muzzle imprint Burning from the powder

16. Intermediate Range

18. Long Range ( 20 – 30 m) -Abrasion collar -No smoke soiling, burning or powder tattooing. -Tissue displacement. -Rarely fatal.

20. Exit wound -Shotguns: Rarely produce exit wound because they traverse the body, but if happened it may cause a huge ragged aperture wound. -Rifled weapons: --Exit wound is usually everted with split flaps. --No burning, smoke or powder soiling. --if the bullet flattened or has destruct some bone internally, exit wound may be more irregular and sometimes very large in size.

21. Exit wound Entrance Wound Exit Wound with split flaps

22. Exit wound

25. Doctors duty in firearm injuries & deaths -Any missile, foreign body such as wads and any skin removed from the margin of a repaired firearm wound should be carefully preserved for the police. -The skin in post-mortem examination around the entrance wound should be removed & kept without formalin, but refrigerated if necessary, for forensic tests for powder residue. -In many countries firearm injuries must be reported to the police even if not fatal.

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