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Fluctuations of arterial blood pressure decrease with mechanical ventilation in premature infants with respiratory
1Department of Pediatrics, Duke University Medical Center, Durham, NC 27710.
Summary
Effective mechanical ventilation significantly reduces arterial blood pressure fluctuations in infants with respiratory distress. This reduction is primarily linked to decreased spontaneous breathing efforts.
Area of Science:
- Neonatal physiology
- Cardiorespiratory monitoring
Background:
- Marked fluctuations in arterial blood pressure (ABP) are linked to a higher risk of intraventricular hemorrhage in neonates.
- Spontaneous breathing is a key factor in the pathophysiology of ABP fluctuations.
Purpose of the Study:
- To investigate whether effective mechanical ventilation decreases ABP fluctuations in infants with respiratory distress.
- To determine the relationship between spontaneous breathing and ABP fluctuations.
Main Methods:
- Studied 20 infants with early respiratory distress receiving nasal continuous positive airway pressure (CPAP).
- Analyzed arterial blood pressure (ABP) and respiratory tracings before and after intubation in 11 infants.
- Quantified ABP fluctuations using the coefficient of variation (CV) and spontaneous respirations (SResp).
Main Results:
- Intubation led to a small increase in peak systolic blood pressure (SBP).
- A significant decrease in both CV and SResp was observed post-intubation.
- A strong correlation was found between reduced CV and reduced SResp.
Conclusions:
- Effective mechanical ventilation reduces beat-to-beat ABP fluctuations in infants.
- The reduction in ABP fluctuations is mainly attributed to decreased spontaneous breathing.