Abdominal compartment syndrome: an under-diagnosed contributory factor to morbidity and mortality in the critically
1Department of Anaesthetics and Intensive Care, Macclesfield District General Hospital, Victoria Road, Macclesfield SK10 3BL, UK. jdhunter@talk21.com
Insights
Elevated intra-abdominal pressure (IAP) above 12 mm Hg can cause organ dysfunction. Persistently high IAP, especially over 20 mm Hg, leads to abdominal compartment syndrome, a critical condition with high mortality.
Area of Science:
- Critical Care Medicine
- Surgical Physiology
- Abdominal Medicine
Background:
- The abdomen functions as a closed cavity, meaning increased contents directly elevate intra-abdominal pressure (IAP).
- Normal IAP is below 7 mm Hg.
- Sustained IAP exceeding 12 mm Hg is linked to significant organ system dysfunction.
Purpose of the Study:
- To highlight the physiological consequences of elevated intra-abdominal pressure.
- To define abdominal compartment syndrome (ACS).
- To emphasize the critical importance of recognizing and managing increased IAP and ACS.
Main Methods:
- Review of physiological principles governing intra-abdominal pressure.
- Discussion of clinical conditions associated with elevated IAP in intensive care settings.
- Definition and clinical implications of abdominal compartment syndrome.
Main Results:
- Intra-abdominal pressure persistently above 12 mm Hg compromises renal, intestinal, pulmonary, cardiovascular, and central nervous system function.
- Intra-abdominal pressure continually above 20 mm Hg can precipitate organ system failure, defining abdominal compartment syndrome.
- Failure to diagnose and manage ACS results in substantial morbidity and mortality.
Conclusions:
- Increased intra-abdominal pressure is a significant physiological challenge in critical care.
- Abdominal compartment syndrome is a life-threatening condition requiring prompt recognition and intervention.
- Effective management of elevated IAP is crucial for improving patient outcomes in intensive care units.
Abstract:
As the abdomen is a closed cavity, it follows that any increase in abdominal contents will inexorably lead to a rise in the intra-abdominal pressure. Normally this is less than 7 mm Hg, but when it persistently exceeds 12 mm Hg, renal, intestinal, pulmonary, cardiovascular and central nervous system dysfunction arises. A wide range of conditions encountered in both medical and surgical intensive care units are associated with a rise in intra-abdominal pressure. When this pressure is continually above 20 mm Hg, organ system failure can occur, a condition known as abdominal compartment syndrome. Failure to recognise and treat this syndrome is associated with a high morbidity and mortality.
Related Concept Videos
Intestinal Obstruction II: Pathophysiology
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Acute Pancreatitis II: Pathophysiology
Ascites
Imbalances in Cardiac Output
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Appendicitis

