Weaning from mechanical ventilation is a critical issue and the diaphragmatic disfunction has been demonstrated to play an important role in extubation failure. the aim of present investigation is to evaluate diaphragmatic excursion velocity during in patients undergoing spontaneous breathing trial through tissue Doppler analysis in both inspiration and expiration.
Study Type
OBSERVATIONAL
Enrollment
100
dTDI was performed at the end of the SBT to assess excursion, velocity, and acceleration.
Children's hospital of Chongqing Medical University
Chongqing, Chongqing Municipality, China
RECRUITINGChange in diaphragmatic displacement velocity
Inspiratory and expiratory diaphragmatic displacement velocity evaluated with tissue doppler during the assisted ventilation modality which preceded the trial, during the spontaneous breathing trial and in spontaneous breathing.
Time frame: an average of 20 minutes
Diaphragmatic acceleration and deceleration
Diaphragmatic acceleration and deceleration evaluated with tissue doppler during the assisted ventilation modality which preceded the trial, during the spontaneous breathing trial and in spontaneous breathing.
Time frame: an average of 20 minutes
Gas exchange - arterial carbon dioxide tension
Arterial blood gases sample
Time frame: through each trial completion, an average of 20 minutes
Gas exchange - pH
Arterial blood gases sample
Time frame: an average of 20 minutes
Gas exchange - arterial oxygen tension
Arterial blood gases sample
Time frame: an average of 20 min
Silverman Andersen Respiratory Severity Score (SA-RSS)
SA-RSS to assess work of breathing after extubation.
Time frame: an average of 20 min
Number of patients who experienced weaning failure
the need for non invasive ventilation or re-intubation due to any cause
Time frame: 48 hours
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