Management of Retroperitoneal Hematoma

Initial Assessment and Imaging

The American College of Radiology recommends CT abdomen/pelvis without and with IV contrast or CTA as the imaging modality of choice for initial evaluation, providing rapid diagnosis, localization of bleeding, and identification of active extravasation 2, 3
CTA is superior when active bleeding is clinically suspected, as it can detect bleeding rates as slow as 0.3 mL/min and provides detailed vascular information 3, 5
Non-contrast CT alone is appropriate in patients with compromised renal function or when additional contrast load is a concern if subsequent angiography may be needed 2, 3
CT findings help determine acuity: high attenuation indicates acute bleeding, mixed attenuation suggests rebleeding, and low attenuation indicates subacute to chronic blood products 2, 3

Hemodynamic instability unresponsive to volume resuscitation requires urgent operative intervention, according to the World Journal of Emergency Surgery 1
Pulsatile or expanding retroperitoneal hematoma discovered during laparotomy mandates exploration 1
Uncontrollable life-threatening hemorrhage with renal pedicle avulsion or renal vein lesion without self-limiting hemorrhage requires urgent operative intervention 1

Super-selective angioembolization is indicated in hemodynamically stable or stabilized patients with arterial contrast extravasation, pseudoaneurysms, arteriovenous fistula, or non-self-limiting gross hematuria 1
Angioembolization should be performed as selectively as possible to preserve organ function 1
Blind angioembolization is NOT indicated in stable patients with negative angiography, regardless of arterial contrast extravasation on CT scan 1
Angioembolization achieves cessation of bleeding in nearly 100% of cases when active bleeding is identified on angiography 2

Retroperitoneal hematomas from pelvic fractures are associated with higher transfusion requirements 6
Penetrating trauma with retroperitoneal hematoma requires exploration if not adequately studied preoperatively 1
Shattered kidney or pyelo-ureteral junction avulsion in hemodynamically stable patients does NOT mandate urgent surgical intervention 1
Urine extravasation alone is not an indication for operative management in the acute setting 1
Devascularized kidney tissue causing refractory hypertension may require delayed nephrectomy if conservative management fails 1

Ultrasound is NOT appropriate for initial diagnosis due to limited acoustic windows and inability to evaluate the entire retroperitoneum reliably 7, 4
Plain radiography has low sensitivity and is usually not appropriate, as moderate-volume hematomas may not produce sufficient mass effect 7
Do not delay CT imaging in stable patients with clinical suspicion—early diagnosis (within first 5 hours) significantly improves outcomes 5

Follow-up CT is appropriate to evaluate for rebleeding, changes in hematoma size, or complications such as infection and abscess formation 2, 3