Mechanical Ventilation Clinical Trial
Official title:
Is Threshold IMT Useful To Accelerate Weaning From Mechanical Ventilation?
Patients under threshold IMT show better conditions to weaning from mechanical ventilation than the control group.
- After at least 48 hours on CMV, the patients in PSV were randomized into two groups:
control group and IMT group.
- Before each protocol session, the cardiorespiratory variables such as f, HR, MAP and
SpO2, as well as the support ventilatory variables such as PSV, PEEP, FiO2 and trigger
sensitivity, were recorded.
- After collecting the first records, the patients were placed in a 45º Fowler position,
and variables MIP and MEP were collected with a unidirectional valve, as well as f, VE,
Vt and f/Vt.
- The IMT group was trained using the threshold IMT device with a 40% MIP load. Each
training session consisted of 5 sets with 10 breaths, twice a day. Supplementary oxygen
was added if necessary during the protocol. The training was cancelled in the presence
of tachyarrhythmia, reduction of SpO2 under 85% and in the presence of fatigue signs or
respiratory dysfunction. In this case, the patients returned to MV. All
cardiorespiratory variables (f, HR, MAP and SpO2) were recorded again one minute after
the end of the protocol. The same data were recorded in the control group before and
after the protocol, but the patients were not trained with the threshold IMT device.
- All patients were followed up until weaning. During this period, laboratory tests were
recorded, such as: potassium, sodium and magnesium as well as arterial gasometry,
calculating the partial pressure of arterial oxygen/fraction of inspired oxygen
(PaO2/FiO2) ratio.
;
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label
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