transitional circulation physiology
Cardiovascular changes occurring from fetal to adult circulation patterns, affecting anesthetic management in neonates.
Full Definition
The complex physiological process by which neonatal circulation transitions from the fetal pattern (with patent ductus arteriosus and foramen ovale) to the adult pattern of separate pulmonary and systemic circulations. This transition typically occurs over the first days to weeks of life but may be delayed or complicated in premature infants or those with congenital heart disease. In pediatric anesthesia, understanding transitional circulation is crucial as factors like hypoxia, acidosis, hypothermia, or excessive pulmonary vascular resistance can cause reversion to fetal circulation patterns, leading to significant right-to-left shunting and hypoxemia.
Usage
Usage note: Explain the clinical implications when referencing transitional circulation in case documentation.
In Context
- "The neonate's transitional circulation physiology made them susceptible to right-to-left shunting during periods of stress." — Pathophysiology documentation
- "Understanding transitional circulation physiology guided the anesthetic management to avoid pulmonary hypertension triggers." — Clinical reasoning notes