AAST Bladder Injury Scale AAST Bowel Injury Scale AAST Cardiac Injury Scale AAST Diaphragm Injury Scale AAST Hepatic Injury Scale AAST Kidney Injury Scale AAST Lung Injury Scale AAST Pancreatic Injury Scale AAST Rectal Injury Scale AAST Splenic Injury Scale AAST Vascular Injury Scale ABC Score (Massive Transfusion)ACS COT Field Triage Guidelines ATLS Hemorrhagic Shock Classification Abbreviated Injury Scale (AIS)Ankle-Brachial Index (ABI) in Trauma Base Deficit in Trauma Brain Injury Guidelines (BIG) Score Cardiac Wound Index Chest Trauma Score (CTS)Damage Control Decision Score (DCDS)Denver Criteria (BCVI)Esophageal Perforation Severity Score (PSS)Expanded Denver Criteria (BCVI)Flint Colon Injury Scale Frailty Index in Trauma (mFI-5)Geriatric Trauma Outcome Score (GTOS)Hard Signs of Vascular Injury Checklist Hemorrhage Control Decision Aid (Wound Packing vs. Tourniquet)ICP-based Cerebral Perfusion Pressure (CPP) Calculator Injury Severity Score (ISS)Injury Severity Score — Age-adjusted (ISS-Age)Lethal Triad / Trauma Triad of Death Calculator Limb Salvage Index (LSI)Mangled Extremity Severity Score (MESS)Mechanism, Glasgow Coma Scale, Age, and Arterial Pressure (MGAP)Memphis Criteria (BCVI)Modified Shock Index (MSI)Nerve Injury, Ischemia, Soft-tissue, Skeletal Injury, Shock, Age (NISSSA)New Injury Severity Score (NISS)Open Abdomen Classification (Björck)Pediatric Trauma Score (PTS)Pelvic Trauma Hemorrhage Risk Score Penetrating Abdominal Trauma Index (PATI)Physiologic Extreme Emergency in Trauma (FEET)Predictive Salvage Index (PSI)REBOA Zone Selection Guide Resuscitative Thoracotomy Indications (EAST/WTA Guidelines)Revised Trauma Score (RTS)RibScore Shock Index (SI)TASH Score TRISS Index Thoracic Trauma Severity Score (TTS)Tile Classification of Pelvic Fractures Trauma and Injury Severity Score — Pediatric (PTS)Young–Burgess Pelvic Fracture Classification

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AAST Bladder Injury Scale

AASTBladder Injury Scale

Highest Finding (Imaging/OR)

Bladder Injury Grading

Select the highest radiologic or operative finding to determine the AAST severity grade.

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

The AAST Bladder Injury Scale is indicated in patients with suspected bladder trauma, most commonly following blunt mechanisms such as motor vehicle collisions with pelvic fractures or direct lower abdominal impact when the bladder is distended. It is also applicable in penetrating trauma to the pelvis or lower abdomen. Use is recommended in hemodynamically stable patients undergoing CT cystography or during operative exploration. The scale helps differentiate contusions/partial tears amenable to catheter drainage from full-thickness intraperitoneal or complex extraperitoneal ruptures requiring operative repair.

The scale does NOT replace clinical judgment in hemodynamically unstable patients; prioritize damage control resuscitation and laparotomy over detailed grading. It has limited utility in isolated pediatric or iatrogenic injuries without validation in those cohorts.

Tool	Primary Use	Strength	Limitation
AAST Bladder Injury Scale	Anatomic grading of bladder wall injury	Widely used, correlates with management	Limited outcome prediction data
Clinical classification (intra- vs extraperitoneal)	Guides operative vs nonoperative	Direct impact on management	Does not quantify severity within category
EAST/WSES Guidelines	Evidence-based management	Incorporates AAST elements	Very low quality evidence base

Last Comprehensive Review: 2026

Related Tools

AAST Kidney Injury Scale

AAST Splenic Injury Scale

Revised Trauma Score

Injury Severity Score

Trauma Surgery Calculators Internal Medicine Calculators Emergency Medicine Calculators

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