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Cardiovascular and catecholamine changes after administration of pancuronium in distressed neonates
Insights
Pancuronium administration in newborns caused significant increases in heart rate and blood pressure, along with elevated catecholamines. Monitoring these vital signs is crucial due to potential risks in distressed infants.
Area of Science:
- Neonatal Medicine
- Pharmacology
- Critical Care
Background:
- Pancuronium is a neuromuscular blocking agent used in neonatal intensive care.
- Its effects on cardiovascular and sympathetic nervous system parameters in neonates require thorough investigation.
Purpose of the Study:
- To evaluate the impact of pancuronium on heart rate, blood pressure, transcutaneous gases, and catecholamine levels in ill newborn infants.
Main Methods:
- Seven ill newborns received intravenous pancuronium.
- Continuous monitoring of heart rate, blood pressure, and transcutaneous gases for 30 minutes pre-infusion and 50 minutes post-infusion.
- Blood samples analyzed for norepinephrine and epinephrine levels.
Main Results:
- No significant changes were observed in transcutaneous gases.
- Significant increases in heart rate, systolic, diastolic, and mean blood pressures were recorded.
- Elevated blood levels of norepinephrine and epinephrine were detected post-pancuronium administration.
- Increased heart rate persisted for 30 minutes; elevated blood pressure lasted for 50 minutes.
Conclusions:
- Pancuronium administration stimulates sympathetic activity in distressed newborns.
- Monitoring heart rate and blood pressure during pancuronium infusion is essential in neonates.
- Potential risks include intraventricular hemorrhage and myocardial dysfunction, necessitating vigilant observation.
Abstract:
Heart rate, blood pressure, transcutaneous gases, and catecholamine changes following intravenous injection of pancuronium were evaluated in seven ill newborn infants (birth weight: 1,280 to 4,500 g; gestational age, 29 to 42 weeks). Each infant was monitored continuously for 30 minutes before and 50 minutes after infusion of the paralyzing agent. There were no significant changes in transcutaneous gases, whereas significant increases in heart rate; systolic, diastolic, and mean blood pressures; and blood norepinephrine and epinephrine levels were found. The increase in heart rate lasted for 30 minutes, and the increase in blood pressure persisted for 50 minutes after administration of the drug. Because of the potential relationship between increased blood pressure and intraventricular hemorrhage and myocardial dysfunction, heart rate and blood pressure must be monitored during infusion of pancuronium in distressed newborns. These data suggest that pancuronium stimulates sympathetic activity in distressed newborns.