<prompt> Indication for surgical compartment release in compartment Syndrome in any compartment is absolute pressure greater than?15 mm Hg20 mm Hg30 mm HgVaries from compartment to compartment  <response>: ANSWER: C 30 mm HgREF: With textSetting the threshold for fasciotomy at a perfusion pressure of 30 mmHg can be considered safe, but still may lead to overtreatment if used routinely REF: Evidence-based Orthopedics - Mohit Bhandari Page 634Different authors consider surgical intervention if: REF: Tiwari A, Haq A I, Myint F, Hamilton G. Acute compartment syndromes. BrJSurg 2002; 89: 397-412.Absolute ICP greater than 30 mmHgDifference between diastolic pressure and ICP greater than 30 mmHg3. Difference between mean arterial pressure and ICP greater than 40 mmHgIntracompartmental pressure may be measured by the wick catheter in patients suspected to have compartment syndrome. By such method a pressure of 30 mm Hg or more sustained for 6-8 hours or more is a likely indication for decompressive fasciotomy REF: Skeletal injury in the child by John Anthony Ogden Page 317IntracompartmentalpressureComments15 mm HgNorma! compartment pressure of lower limbs25 mm HgVenous drainage from dosed myofascial spaces is impaired.30 mm HgComplete venous collapse60 mm HgNeuromuscular ischemiaREF: Mastery of vascular and endovascular surgery - Gerald B. Zelenock, Thomas S. Huber, Louis M. Messina Page 507 