Glenn shunt
A surgical connection between the superior vena cava and pulmonary artery, creating passive pulmonary blood flow.
Full Definition
The Glenn shunt, also known as a superior cavopulmonary connection, is a surgical procedure that directly connects the superior vena cava to the right pulmonary artery. This creates a passive flow of venous blood to the lungs without requiring ventricular pumping. The bidirectional Glenn shunt connects to both pulmonary arteries, while the classic Glenn connects only to the right. This procedure is commonly performed as Stage II palliation in single-ventricle physiology, typically between 4-6 months of age. The Glenn reduces volume load on the single ventricle while maintaining adequate pulmonary blood flow, serving as an intermediate step toward Fontan completion.
Usage
Usage note: Capitalize 'Glenn' as it's named after surgeon William Glenn.
In Context
- "The bidirectional Glenn shunt was performed at six months of age." — Surgical report
- "Glenn physiology provided excellent saturations without cyanosis." — Follow-up note