Studying Hemodynamics during Weaning from Mechanical Ventilation among Critically ill Pediatric Patients

Abstract

Abstract Background Among the multiple causes of weaning failure from mechanical ventilation, cardiovascular dysfunction is increasingly recognized as a quite frequent cause that can be treated successfully. Knowledge of the changes in the cardiopulmonary pathophysiology occurring during mechanical ventilation and its withdrawal is a prerequisite for early recognition of weaning failure of cardiovascular origin and optimal patient management. Aim of the Work Identification of hemodynamic and biomarkers changes during weaning process from mechanical ventilation and how these changes predict weaning success Methodology This cross sectional study was conducted on 50 children who were admitted to Pediatric Intensive Care Units and were mechanically ventilated and ready to be weaned according to weaning criteria. assessment of hemodynamic changes during weaning was done by tracing and comparing vital data, echocardiography parameters and levels of serum BNP and troponin in all patients during pressure support ventilation and at the end of spontaneous breathing trial (SBT) for identification of changes during weaning and risk factors for weaning failure. Results There was statistically significant increase in heart rate, cardiac index and E/A ratio at the end of SBTin all studied patients with lower cardiac index in patients who failed weaning, significant increase in TAPSE at the end of SBT with lower TAPSE in patients who failed weaning. Levels of BNP1 during pressure support were significantly higher in patients who failed weaning however levels of troponin didn’t show significant changes. Conclusion Transthoracic echocardiography can accurately detect changes in central hemodynamics induced by the SBT. It helps the attending physician to identify patients at high risk of weaning failure, when documenting a lower cardiac index, low TAPSE values.