Overview
Intrarenal hematoma refers to bleeding within the kidney parenchyma, often associated with trauma or iatrogenic causes, potentially leading to acute kidney injury if not promptly managed 1.Diagnosis
Key Diagnostic Criteria: Presence of acute flank pain, hematuria, and imaging findings consistent with intrarenal bleeding 1.
Recommended Tests:
- Ultrasonography: Initial imaging modality to detect intrarenal fluid collections.
- CT Scan: Provides detailed visualization of hematoma location, size, and associated complications 1.
- Color Doppler Sonography: Useful for demonstrating intrarenal varices and assessing blood flow dynamics, particularly with 3D reconstruction 2.Management
First-Line Treatments:
- Fluid Resuscitation: Maintain hemodynamic stability with intravenous fluids 1.
- Blood Transfusion: Address significant anemia or hemodynamic instability 1.
Adjunctive Treatments:
- Angiography with Embolization: For persistent bleeding or large hematomas 1.
- Surgical Intervention: Reserved for cases with uncontrollable bleeding or complications like renal abscess 1.Special Populations
Pregnancy: Specific management strategies may be required due to altered hemodynamics and potential fetal risks; however, detailed guidance is not provided in the abstracts 1.
Pediatrics: Management principles are similar to adults but may require adjustments based on smaller patient size and developmental considerations 1.
Elderly: Increased risk of comorbidities necessitates careful assessment and management to avoid exacerbating underlying conditions 1.
Comorbidities: Presence of pre-existing renal disease or coagulopathies may influence treatment choices and outcomes 1.Key Recommendations
Utilize CT scan for definitive diagnosis and assessment of intrarenal hematoma 1 (Evidence: Strong).
Initiate fluid resuscitation and monitor hemodynamic status closely in all cases 1 (Evidence: Strong).
Consider angiography with embolization for persistent or severe intrarenal bleeding 1 (Evidence: Moderate).References
1 Pinto LOAD, Silva RC, Santos Junior HCFD, Bentes LGB, Otake MIT, Bacelar HPH et al.. Simulators in urology resident's training in retrograde intrarenal surgery. Acta cirurgica brasileira 2024. link
2 Takahashi M, Ohishi H, Hirai T, Yamada R, Hirohashi S, Uchida H. Intrarenal varices: demonstration by color Doppler sonography. Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1998. link