This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
Compartment syndrome is confirmed at pressure above 
Select and explain. 
A. 30 mm Hg, B. 40 mm Hg, C. 50 mm Hg, D. 35 mm Hg
A: 30 mm Hg
Answer: A: 30 mm Hg 
Explanation: Ans. (a) 30 mm HgRef Bailey and Love 27th edition Page 408Compartment Syndrome:* MC cause - Fracture (70%)* Other causes:# Soft tissue contusion# Bleeding disorders# Circumferential Burns# Post ischemic swelling# Tight Casts/Dressings# IV fluids extravasation* C/F- Pain on passive stretch (Early Sign), Late sign (pulselessness)* Absolute pressure >30mmHg or Pressure Gradient (Diastolic pressure - Compartment Syndrome) is less than Equal to 30mmHg is Compartment syndrome.