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High-frequency jet ventilation improves cardiac function after the Fontan procedure
J N Meliones1, E L Bove, M K Dekeon
1Department of Pediatrics, C.S. Mott Children's Hospital, University of Michigan Medical Center, Ann Arbor 48109.
Circulation
|November 1, 1991
Summary
High-frequency jet ventilation (HFJV) significantly reduced mean airway pressure and pulmonary vascular resistance in pediatric patients after the Fontan procedure. This led to a notable increase in cardiac output, improving hemodynamic stability.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Respiratory Physiology
Background:
- Pulmonary vascular resistance impacts cardiac output post-Fontan procedure.
- Elevated mean airway pressure negatively affects pulmonary vascular resistance.
- High-frequency jet ventilation (HFJV) offers an alternative ventilation strategy using lower mean airway pressure.
Purpose of the Study:
- To investigate if HFJV can decrease mean airway pressure and pulmonary vascular resistance.
- To determine if HFJV can increase cardiac output in patients after the Fontan procedure.
Main Methods:
- Prospective study of 13 pediatric patients (0.9-8.5 years) post-Fontan procedure.
- Hemodynamic parameters (cardiac index, pulmonary vascular resistance) measured using catheters and dye dilution.
- Patients were ventilated conventionally, then switched to HFJV for 30-60 minutes, followed by a return to conventional ventilation.
Main Results:
- HFJV reduced mean airway pressure by 50% (p < 0.001).
- Pulmonary vascular resistance decreased by 59% with HFJV (p < 0.001).
- Cardiac index increased by 25% during HFJV (p < 0.001), with no significant change in gas exchange.
Conclusions:
- HFJV effectively lowers mean airway pressure and pulmonary vascular resistance in pediatric patients after the Fontan procedure.
- HFJV improves cardiac output in this patient population.
- HFJV is a promising ventilation strategy for managing hemodynamics post-Fontan procedure.