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Early diagnosis and management of renovascular hypertension
Insights
Pediatric renovascular hypertension, often caused by renal artery stenosis, is treatable. Prompt diagnosis and surgical intervention, including nephrectomy or revascularization, can effectively manage hypertension in infants and children.
Area of Science:
- Pediatric Nephrology
- Vascular Surgery
- Hypertension Management
Background:
- Renovascular hypertension is more prevalent in children than adults.
- Renal artery stenosis is a significant cause of surgically correctable hypertension in pediatric patients.
- Umbilical artery catheterization is a potential risk factor for renal artery complications in neonates.
Purpose of the Study:
- To review cases of pediatric renovascular hypertension.
- To highlight the efficacy of surgical interventions for renal artery stenosis.
- To emphasize the importance of monitoring blood pressure in infants with umbilical artery catheters.
Main Methods:
- Case series review of infants with hypertension secondary to renal artery issues.
- Surgical interventions including nephrectomy, partial nephrectomy, and revascularization.
- Diagnostic modalities such as ultrasonography, angiography, and renin assays.
Main Results:
- Three infants with renal artery thrombosis secondary to umbilical artery catheterization responded to nephrectomy.
- One infant with polar vessel stenosis secondary to catheterization was cured by partial nephrectomy.
- Two infants with fibromuscular dysplasia-related renal artery stenosis benefited from revascularization, achieving normotension.
Conclusions:
- Surgically correctable renal artery lesions are crucial in pediatric hypertension.
- Early diagnosis and intervention, utilizing advanced surgical techniques, can salvage renal function and resolve hypertension.
- Vigilant blood pressure monitoring and aggressive management are essential for infants with umbilical artery catheters.
Abstract:
Renovascular hypertension is more common in hypertensive children than in hypertensive adults, and renal artery stenosis is second only to coarctation of the thoracic aorta as a cause of surgically correctable hypertension. Three infants presented with uncontrollable hypertension secondary to renal artery thrombosis due to umbilical artery catheterization for respiratory distress in the neonatal period. They all responded to nephrectomy. A fourth infant had stenosis of a polar vessel secondary to umbilical artery catheterization and was cured by partial nephrectomy. Two infants with renal artery stenosis secondary to fibromuscular dysplasia benefited from revascularization and, at last follow-up, were normotensive and off all blood pressure medication. Ultrasonography, isotope scanning, angiography and selective renal vein renin assays should be used to identify patients with surgically correctable lesions. The use of fine suture material and microvascular surgical techniques, including ex vivo revascularization and autotransplantation, can salvage renal parenchyma and relieve hypertension. Infants with less than 10 percent renal function on the involved side should have a nephrectomy. The infant with an umbilical arterial catheterization line needs blood pressure monitoring and aggressive evaluation and treatment of persistent hypertension.