Inflow occlusion for semilunar valve stenosis

Area of Science:

• Pediatric Cardiac Surgery
• Congenital Heart Disease
• Surgical Techniques

Background:

• Valvotomy is a surgical procedure to treat valvular stenosis.
• Inflow occlusion and cardiopulmonary bypass are two surgical techniques used in valvotomy.
• The safety and efficacy of these techniques, particularly in neonates and infants, require further investigation.

Purpose of the Study:

• To compare the morbidity and expense of inflow occlusion versus cardiopulmonary bypass for pulmonary stenosis.
• To evaluate the safety and effectiveness of inflow occlusion in patients with aortic and pulmonary stenosis.

Main Methods:

• Retrospective review of 29 patients who underwent valvotomy with inflow occlusion since 1975.
• Comparison of 11 non-infant patients (inflow occlusion) with 10 concurrent patients (cardiopulmonary bypass) with pulmonary stenosis.
• Analysis of operating room time, blood utilization, and total expense.

Main Results:

• Inflow occlusion resulted in significantly less operating room time (2.0 vs. 3.6 hours), blood utilization (0.3 vs. 1.7 units), and total expense ($4,600 vs. $7,000) compared to cardiopulmonary bypass (p < 0.01).
• Mortality occurred in 6 patients (all < 2 days old), with 3 deaths in the aortic stenosis group and 3 in the pulmonary stenosis group.
• Two newborns with critical pulmonary stenosis required reoperation.

Conclusions:

• Inflow occlusion valvotomy is a safe and effective procedure for patients older than two days with isolated pulmonary valvular stenosis.
• It presents an attractive alternative to cardiopulmonary bypass, offering reduced morbidity and expense.
• Inflow occlusion is also suitable for neonates with aortic stenosis.