The average of the maximal inspiration (maxima), the maximal expiration (minima), and the period of the reference respiratory cycles were set as a standard, and the respective root mean square errors (RMSE) were calculated for the entire signals.
To determine the expiration/inspiration ratio of RR intervals during the paced breathing phase, maximum RR intervals during expiration and minimum RR intervals during inspiration were detected during each breathing cycle, averaged over all breathing cycles obtained and the expiration/inspiration ratio was calculated.
Airway pressure variations were calculated as the mean values for six respiratory cycles of maximal airway pressure (expiration) minus minimum airway pressure (inspiration).
The IVC collapsibility index (cIVC, which reflects the decrease in the diameter upon inspiration) was calculated as (maximum diameter on expiration (IVCmax) – minimum diameter on inspiration (IVCmin))/ IVCmax.
ECG: Electrocardiogram; HoLEP: Holmium laser enucleation of the prostate; ICU: Intensive care unit; I E: Inspiration:expiration; MAC: Minimum alveolar concentration; Ppeak: Peak inspiratory pressure; PEEP: Positive end-expiratory pressure; TURP: Transurethral resection of the prostate.
NO Inspiratory transpulmonary pressures decreased (P = 0.04) and airway pressures were considerably lower at inspiration (-1.5 cminimum-maximumaximum -3 to 0 cmH2O) vs 34.5 cminimum-maximumaximum 30 to 47 cmH2O), P = 0.03) and expiration (4.5 cminimum-maximumaximum 2 to 5) vs 16 cminimum-maximumaximum 16 to 23), P =0.03).
The challenge is in holding enough stock to ensure a high level of supply while keeping losses from expiration at a minimum.
Maximum tracheal temperature was the highest temperature measured during expiration, and the minimum temperature was the lowest temperature measured during inspiration.
We posit that lung structure is optimized for the rate of expiration as well as minimum energy loss.
30 We required each expiration to last a minimum of 6 s, to reach an end-expiratory plateau of 25 ml/s, to be without an unsatisfactory start defined by a back-extrapolation volume that was either 5% or 150 ml of the forced vital capacity (FVC) and to be free of cough or glottis closure artefacts.
The image was obtained as described earlier, and the dIVC was calculated according to the following equation: (maximum diameter on inspiration _ minimum diameter on expiration)/minimum diameter on expiration.
