ductal-dependent lesion
A congenital heart defect where adequate circulation depends on blood flow through the patent ductus arteriosus.
Full Definition
Ductal-dependent lesions are critical congenital heart defects where systemic or pulmonary circulation relies on the patent ductus arteriosus remaining open. These include hypoplastic left heart syndrome, critical aortic stenosis, and pulmonary atresia. In pediatric anesthesia, these patients require careful management to maintain ductal patency, often with prostaglandin E1 infusion. Anesthetic considerations include avoiding increases in pulmonary vascular resistance and maintaining balanced circulation between systemic and pulmonary circuits. Recognition is crucial as ductal closure can be life-threatening.
Usage
Usage note: Use hyphenated form consistently; avoid abbreviating to DDL in formal documentation.
In Context
- "The neonate with ductal-dependent lesion required continuous prostaglandin E1 infusion throughout surgery." — Anesthetic plan
- "Anesthetic management of ductal-dependent lesions focuses on maintaining balanced Qp:Qs ratios." — Clinical guideline