Suspected Renal Trauma
Blunt or penetrating injury with flank pain, hematuria
All Pathways
UrologyEmergency
Renal Trauma Management (AUA Urotrauma 2020)
Renal Trauma Management (AUA Urotrauma 2020): Suspected Renal Trauma → ATLS Primary Survey → Hemodynamically Stable? → Hemodynamically Unstable → Surgic...
Pathway Overview
16 steps
Algorithm Steps
16 total
01Start 02Action ATLS Primary Survey
Stabilize before urological evaluation
- Airway, Breathing, Circulation first
- Large bore IV access x2
- Type and crossmatch
- Assess mechanism: blunt vs penetrating
- Associated injuries common (40-80%)
03Decision Hemodynamically Stable?
Responding to resuscitation?
04Warning Hemodynamically Unstable
Immediate intervention required
- If isolated renal injury suspected: OR vs IR
- If multi-system trauma: damage control surgery
- Consider angioembolization if available
- Nephrectomy may be necessary
- One-shot IVP if OR without CT
05Action Surgical Exploration
When intervention fails or not available
- Indications: Hemodynamic instability
- Expanding/pulsatile hematoma at OR
- Grade V hilar avulsion
- Failed angioembolization
- Attempt renorrhaphy if possible
- Nephrectomy if not salvageable
06Action Follow-Up Care
Monitor for complications
- Repeat imaging 48-72h for Grade III-IV
- Blood pressure monitoring (renovascular HTN)
- Follow-up CT at 3 months for high-grade
- Monitor renal function if bilateral/solitary
- Watch for delayed bleeding (up to 2 weeks)
07Outcome Long-Term Outcomes
90%+ renal preservation with NOM
- NOM success: >95% for Grade I-III
- NOM success: 85-90% for Grade IV
- Nephrectomy rate <5% with modern approach
- HTN risk: 1-5%
- Monitor for AV fistula, pseudoaneurysm
08Action CT Abdomen/Pelvis with IV Contrast
Gold standard for renal injury staging (AUA Strong Rec)
- Arterial and delayed (10-15 min) phases
- Assess renal perfusion
- Identify extravasation (urine or blood)
- Evaluate collecting system injury
- Stage per AAST grading
09Decision AAST Renal Injury Grade?
Determines management pathway
10Action Grade I-II (Low Grade)
Contusion or non-expanding hematoma
- Grade I: Contusion or subcapsular hematoma
- Grade II: <1cm laceration, no extravasation
- Non-operative management (AUA Strong Rec)
- Bed rest, serial hemoglobin
- Discharge when stable, hematuria resolving
11Action Non-Operative Management
Observation and supportive care
- Bed rest until gross hematuria resolves
- Serial hemoglobin every 6-8 hours initially
- IV fluids, transfuse PRN
- Antibiotics if penetrating injury
- VTE prophylaxis when safe
- Advance activity as tolerated
12Action Urine Extravasation Management
Collecting system injury
- Most resolve spontaneously
- Consider ureteral stent for persistent leak
- Percutaneous drain for urinoma
- Repeat imaging at 48-72h
- Stent for >72h persistent extravasation
- Path rejoins step 06Shared downstream outcome
13Action Grade III-IV (High Grade)
Deep laceration or vascular injury
- Grade III: >1cm laceration into medulla
- Grade IV: Laceration into collecting system OR segmental vessel injury
- Non-operative management if stable (AUA Strong Rec)
- ICU admission, close monitoring
- Serial CT at 48-72h for high-grade
- Watch for delayed bleeding, urinoma
14Decision Active Bleeding on CT?
Contrast extravasation or expanding hematoma
15Action Angioembolization
Selective embolization for hemorrhage (AUA Strong Rec)
- First-line for stable patients with active bleeding
- Selective embolization preserves parenchyma
- Success rate >90% for hemorrhage control
- May need repeat embolization in 5-10%
- Consider if pseudoaneurysm or AV fistula
- Path rejoins step 12Shared downstream outcome
- Path rejoins step 11Shared downstream outcome
16Warning Grade V (Shattered/Avulsion)
Shattered kidney or hilar avulsion
- Shattered kidney (multiple lacerations)
- Main renal artery/vein avulsion
- Often requires surgical exploration
- Attempt repair vs nephrectomy
- Warm ischemia time <30-60 min for salvage
- Path rejoins step 05Shared downstream outcome
Guideline Source
AUA Urotrauma Guideline 2020 (Amended 2022)
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Does not address pediatric-specific modifications
- Does not cover penetrating vs blunt in detail
- Institutional resources may limit angioembolization availability
- Does not address isolated ureteral injuries from renal trauma
- Solitary kidney requires modified approach
Contraindicated Populations
pediatric_complex
Applicable Regions
USEUUKAU
AU: RACS trauma guidelines align with AUA recommendations
EU: EAU Urological Trauma 2024 concordant with AUA approach
UK: Follow AUA/EAU guidance, NICE supports conservative management
US: AUA Urotrauma 2020 - definitive guideline for US practice
Version 1Next review: 2028-01-11
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Related Resources
Frequently Asked Questions
What is the Renal Trauma Management (AUA Urotrauma 2020)?
The Renal Trauma Management (AUA Urotrauma 2020) is a emergency clinical algorithm for Urology. It provides a structured decision tree to guide clinical decision-making, based on AUA Urotrauma Guideline 2020 (Amended 2022).
What guideline is the Renal Trauma Management (AUA Urotrauma 2020) based on?
This algorithm is based on AUA Urotrauma Guideline 2020 (Amended 2022) (DOI: 10.1097/JU.0000000000001408).
What are the limitations of the Renal Trauma Management (AUA Urotrauma 2020)?
Known limitations include: Does not address pediatric-specific modifications; Does not cover penetrating vs blunt in detail; Institutional resources may limit angioembolization availability; Does not address isolated ureteral injuries from renal trauma; Solitary kidney requires modified approach. Individual patient factors may require deviation from these recommendations.
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