Abdominal Compartment Syndrome

ACS is defined as sustained IAP >20 mm Hg, with or without abdominal perfusion pressure (APP) <60 mm Hg, associated with new organ dysfunction or failure. IAH precedes ACS and is defined by sustained or repeated IAP >12 mm Hg. APP is calculated as mean arterial pressure minus IAP. BMJ+2BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best PracticeScienceDirectAbdominal Compartment Syndrome - an overview

The high-value diagnostic distinction is between elevated pressure alone and pressure causing a new physiologic deterioration. Oliguria, increasing ventilator pressures with worsening gas exchange, hypotension or reduced cardiac output, and progressive abdominal distension should trigger immediate IAP measurement rather than attribution solely to shock, ARDS, acute kidney injury, or the underlying abdominal disease. BMJ+2BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USScienceDirectAbdominal Compartment Syndrome - an overviewacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

Clinical examination is insufficient to exclude IAH or ACS; physical findings are nonspecific and often late. In critically ill patients with risk factors, proactive IAP monitoring is therefore central to diagnosis. BMJ+1BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

Use transbladder measurement through an indwelling Foley catheter. Device labeling supports bladder-pressure monitoring as an aid to diagnosing IAH and ACS. fda+1fdaOrthopaedic and Rehabilitation Devices Panel Sept. 8-9, 2020 - PHU Executive SummaryfdaORDP Sept. 8-9, 2020 - Classification of Intra-Abdominal Pressure Monitoring Devices Standardization matters because abdominal muscle activity, position, respiratory phase, transducer level, and excessive bladder instillation can distort results. fda+1fdaOrthopaedic and Rehabilitation Devices Panel Sept. 8-9, 2020 - PHU Executive SummaryacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

For an interpretable bedside value, position the patient supine and as relaxed as possible; record at end expiration; level the transducer at the midaxillary line at the iliac-crest level; and instill less than 25 mL of fluid to establish the fluid column. If the patient is intubated and abdominal contraction is materially limiting interpretation, neuromuscular blockade may improve measurement accuracy. acepacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

In critically ill patients with at least one risk factor, screening may be performed every 4 to 6 hours or at least daily according to the ACEP summary of WSACS-oriented practice. Escalate the frequency when IAP is elevated or organ function is worsening. acepacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

For IAH or suspected ACS, address reversible pressure drivers immediately. Core nonoperative goals are evacuation of intraluminal contents, evacuation of intra-abdominal or extraluminal contents, improvement in abdominal-wall compliance, and optimization of fluid balance. Wiley+1WileyNonoperative Management of Intraabdominal ...acepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU These measures should not delay surgical evaluation when new organ dysfunction is progressing.

Decompress the gastrointestinal tract with nasogastric and rectal decompression when appropriate. Hold enteral feeding during worsening IAH; in the absence of bowel obstruction, prokinetic therapy may be used. acepacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

Drainage is particularly relevant when ascites or a sizable fluid collection is a major pressure contributor. Paracentesis or drain placement may reduce pressure in selected patients with substantial intra-abdominal fluid before ACS is established or when laparotomy carries substantial risk. fdafdaOrthopaedic and Rehabilitation Devices Panel Sept. 8-9, 2020 - PHU Executive Summary

Avoid continuing excessive intravenous fluid administration once initial resuscitation priorities permit. Positive fluid balance and third spacing can aggravate bowel and retroperitoneal edema, worsening IAP. BMJ+2BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USWileyNonoperative Management of Intraabdominal ...acepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU Analgesia, appropriate positioning, and—when severe abdominal-wall muscle tone is contributing—short-term neuromuscular blockade can decrease IAP; available evidence summarized by ACEP notes improved organ function but no proven mortality benefit for neuromuscular blockade. BMJ+1BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU

Decompressive laparotomy is the definitive treatment for ACS and is generally reserved for patients in whom medical or minimally invasive pressure-reducing measures fail. BMJ+1BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU The indication is worsening pressure-associated organ dysfunction, not an IAP threshold in isolation. Historical literature emphasizes that no single pressure threshold applies universally because clinical effects and pressure do not correlate perfectly across patients. ScienceDirectScienceDirectThe abdominal compartment syndrome: a complication with many faces

At laparotomy, the abdomen is typically managed open with a temporary abdominal closure rather than forced fascial reapproximation. Open-abdomen strategies use temporary coverage systems, including vacuum-based approaches, to accommodate edema and reduce recurrent IAH risk. JAMA+2JAMAAbdominal Compartment Syndrome in the Open AbdomenScienceDirectDecompressive laparotomy for abdominal compartment syndrome in children: before it is too lateScienceDirectAbdominal Compartment Syndrome - an overview

Prepare for abrupt physiologic shifts with decompression. Reported concerns include hemodynamic instability, reperfusion effects, hyperkalemia, hemorrhage, fluid loss, infection, evisceration, and enterocutaneous fistula; temporary abdominal closure can also lead to a ventral hernia requiring delayed reconstruction. ScienceDirectScienceDirectAbdominal Compartment Syndrome - an overview

Untreated ACS is potentially fatal, and mortality remains high even after treatment. BMJ+2BMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJAbdominal compartment syndrome - Symptoms, diagnosis and treatment | BMJ Best PracticeacepMidriff Mayhem: Abdominal Compartment Syndrome in the ICU In a pediatric decompressive-laparotomy series, overall mortality was 58%; however, this reflects a severely ill selected cohort and should not be generalized to all adults or children with ACS. ScienceDirectScienceDirectDecompressive laparotomy for abdominal compartment syndrome in children: before it is too late

Explain to families that decompression aims to reverse immediately life-threatening pressure-related organ dysfunction, but the patient may remain at high risk from the underlying cause, ischemia-reperfusion injury, sepsis, hemorrhage, respiratory failure, kidney injury, and complications of an open abdomen. ScienceDirect+1ScienceDirectDecompressive laparotomy for abdominal compartment syndrome in children: before it is too lateScienceDirectAbdominal Compartment Syndrome - an overview