The study is a pre-post test with quasi experimental design. Forty-two intubated-adults who had been mechanically ventilated for more than 21 days were selected on the basis of inclusion criteria in respiratory care ward. These patients were classified equally into study group and control group. The experimental group received the intervention of respiratory muscles training 5 times/ a week for 6 weeks. The control group received normal care. The intervention was adjusted trigger sensitivity to 10% of the first recorded Maximal Inspiratory Pressure at the start of training, then increased the ventilator trigger sensitivity and training duration weekly. The largest of ventilator trigger sensitivity is not over 40% of the initial Maximal Inspiratory Pressure and the timing of training duration is no longer than 30 minutes.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
43
The experimental group received the intervention of inspiratory muscles training 5times/week for 6 weeks, 5days/ per cycle; the patients stayed in the semi-recumbent position, recorded the initial/first measurement of MIP. The trigger sensitivity was adjusted to 10% of the first recorded MIP at the start of training, then reducing the ventilator trigger sensitivity and training duration weekly.
Shinghou Hospital
Kaohsiung City, Fengshan, Taiwan
Maximal inspiratory pressure
a measure of the strength of inspiratory muscles, measurement by cmH2O.
Time frame: 7 weeks
Tidal volume
the volume of air that is transported into and out of the lungs with each respiratory cycle, measurement by mL per inspiration
Time frame: 7 weeks
Minute ventilation volume
the quantity of air moved into and out of the lungs in a minute, measurement by l.min
Time frame: 7 weeks
Rapid shallow breathing index
the ratio of respiratory frequency to tidal volume (f/VT)
Time frame: 7 weeks
Oxygenation index.
Oxygenation index OI = FiO2 x 100 x M AP/PaO2, where FiO2 is the fraction of inspired oxygen, MAP is the mean airway pressure, and PaO2 is the partial pressure of oxygen in arterial blood, calculated at the end of the first day of standardized preoperative stabilization
Time frame: 7 weeks
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