Measurement of Ventilatory Muscle Strength
The ventilatory muscle strength was determined by assessing maximum
inspiratory pressure (Maximum Inspiratory Pressure (MIP)) using an
analog manovacuometer (Indumed®, Brazil) in the preoperative period in
both groups. The measurement was performed using the protocol evaluated
by Neder et al.11, which uses a unidirectional valve
coupled to the manovacuometer and a nozzle with a 1mm millimeter
orifice. The participant was asked to perform a maximum exhalation up to
the residual volume and then a maximum and slow inhalation until the
total lung capacity. The measurements were repeated 3 times, with an
interval of one minute between them, using the highest value reached,
provided that this value was not the last10. This
assessment was repeated at the time of hospital discharge.