Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS) — free guideline decision tool
Intra-abdominal hypertension grading and abdominal compartment syndrome (ACS) determination per WSACS, with abdominal perfusion pressure.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
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No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Intra-abdominal pressure IAP (bladder manometry, supine, end-expiration) | 18 mmHg |
|---|---|
| Mean arterial pressure MAP (for APP, optional) | 75 mmHg |
| New-onset organ dysfunction/failure | No |
→IAH gradeIAH grade II (16–20)
- Grade：IAH grade II (16–20)
- Abdominal perfusion pressure APP：APP = MAP − IAP = 75 − 18 = 57 mmHg (target ≥ 60; not met)
- Management direction：IAH: monitor IAP every 4–8 h; medical lowering of abdominal pressure (gastric decompression, drainage, improving abdominal-wall compliance, limiting over-resuscitation, optimizing APP), dynamically reassess organ function
Common questions
What is Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS)?
Intra-abdominal hypertension grading and abdominal compartment syndrome (ACS) determination per WSACS, with abdominal perfusion pressure.
How is Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS) calculated? What is the core formula?
IAH = sustained IAP ≥ 12 mmHg, graded I (12–15) / II (16–20) / III (21–25) / IV (> 25); ACS = sustained IAP > 20 with new-onset organ dysfunction. APP = MAP − IAP, target ≥ 60 mmHg.
When is Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS) used?
Use to grade measured intra-abdominal pressure, identify ACS, and compute abdominal perfusion pressure to guide medical vs surgical management.
What are the key clinical points for Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS)?
IAP must be measured correctly (bladder manometry, supine, end-expiration, zeroed at the mid-axillary line) or the grade is meaningless (original synthesis · not guideline verbatim). ACS is defined by organ dysfunction, not by an absolute pressure alone — progression rate and duration matter. Refractory ACS is a surgical emergency requiring decompressive laparotomy after medical measures fail.
What are the limits and cautions when using Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
How is Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS) calculated in practice? Can you show a worked example?
Inputs: Intra-abdominal pressure IAP (bladder manometry, supine, end-expiration) 18 mmHg, Mean arterial pressure MAP (for APP, optional) 75 mmHg, New-onset organ dysfunction/failure No → Result: IAH grade IAH grade II (16–20)（Grade: IAH grade II (16–20), Abdominal perfusion pressure APP: APP = MAP − IAP = 75 − 18 = 57 mmHg (target ≥ 60; not met), Management direction: IAH: monitor IAP every 4–8 h; medical lowering of abdominal pressure (gastric decompression, drainage, improving abdominal-wall compliance, limiting over-resuscitation, optimizing APP), dynamically reassess organ function）
Run Intra-abdominal Hypertension & Abdominal Compartment Syndrome (IAH/ACS) now
Intra-abdominal hypertension grading and abdominal compartment syndrome (ACS) determination per WSACS, with abdominal perfusion pressure.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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