A 28-year-old man sustains a fall from height. Injuries include an AIS 4 liver laceration, AIS 3 splenic injury, AIS 3 pelvic fracture, AIS 2 femur fracture, and AIS 1 facial laceration. What is the Injury Severity Score (ISS)?
- A 34
- B 43
- C 50 ✓
- D 74
Correct answer: C. 50
Explanation
ISS is calculated by squaring the AIS scores of the three most severely injured body regions and summing them. The three highest are liver (4), spleen (3), and pelvis (3) from different regions. ISS equals 4 squared plus 3 squared plus 3 squared = 16 + 9 + 9 = 34. Since the three injuries are in different body regions (abdomen, abdomen, pelvis), the calculation gives 34.
Reference: Bailey and Love's Short Practice of Surgery, 28th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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