Table 2 Non-dynamic parameters. Reduction in non-dynamic power, flow and pressure, both during spontaneous breathing and NPPV
Power parameters, non-dynamic | ||||||||||||
PWRmax (Watt) | PWR-integral (Joule) | CPO (Watt) | ||||||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 13.6 (2.8) | 13.3 (2.4) | 1.03 (0.14) | 1.01 (0.16) | 0.92 (0.23) | 0.95 (0.21) | ||||||
20 mmHg | 13.3 (3.2) | **11.8 (3.1) | −11 % | **0.96 (0.17) | −6.9 % | **0.84 (0.19) | −17 % | 0.89 (0.23) | **0.81 (0.20) | −15 % | ||
40 mmHg | **11.6 (3.2) | −15 % | **10.2 (3.5) | −23 % | **0.77 (0.19) | −25 % | **0.66 (0.20) | −34 % | **0.73 (0.22) | −21 % | **0.73 (0.25) | −23 % |
60 mmHg | **9.9 (2.8) | −27 % | **8.8 (3.3) | −34 % | **0.69 (0.19) | −41 % | **0.51 (0.19) | −50 % | **0.71 (0.21) | −23 % | **0.64 (0.27) | −33 % |
80 mmHg | **7.4 (1.9) | −46 % | **6.7 (3.0) | −50 % | **0.42 (0.13) | −59 % | **0.32 (0.11) | −68 % | **0.57 (0.15) | −38 % | **0.48 (0.18) | −49 % |
Flow parameters, non-dynamic | ||||||||||||
Aorta maxflow (m/s) | Stroke volume (ml) | CO (L/min) | ||||||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 0.88 (0.12) | 0.85 (0.15) | 83.0 (10.6) | 77.9 (13.4) | 4.91 (1.08) | **4.85 (1.33) | ||||||
20 mmHg | 0.85 (0.15) | *0.78 (0.16) | −8.2 % | *77.3 (12.1) | −6.9 % | **67.6 (16.4) | −13 % | 4.74 (1.2) | **4.26 (0..99) | −12 % | ||
40 mmHg | **0.76 (0.18) | −14 % | **0.66 (0.21) | −22 % | **63.0 (15.3) | −24 % | **52.3 (17.6) | −33 % | **3.93 (1.11) | −20 % | **3.64 (1.28) | −25 % |
60 mmHg | **0.67 (0.17) | −24 % | **0.62 (0.18) | −27 % | **50.7 (14.1) | −39 % | **44.2 (13.7) | −43 % | **3.74 (1.08) | −24 % | **3.48 (1.33) | −28 % |
80 mmHg | **0.55 (0.14) | −38 % | **0.53 (0.14) | −38 % | **37.0 (15.5) | −55 % | **30.4 (11.9) | −61 % | **3.13 (1.06) | −36 % | **2.89 (1.01) | −40 % |
Pressure parameters, non-dynamic | ||||||||||||
Systolic pressure (mmHg) | Pulse pressure (mmHg) | MAP (mmHg) | ||||||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 118 (12.2) | 123 (17.3) | 59.2 (11.4) | 61.5 (10.8) | 75.7 (10.1) | 80.2 (16.1) | ||||||
20 mmHg | 119 (16.2) | 121 (22.2) | 59.9 (16.5) | 59.7 (15.4) | 76.0 (11.7) | 78.0 (18.2) | ||||||
40 mmHg | 120 (15.6) | 124 (21.6) | 58.8 (15.8) | *56.1 (18.3) | −9 % | 76.3 (11.7) | 82.1 (18.7) | |||||
60 mmHg | 115 (13.4) | *114 (27.0) | −7.3 % | **50 (11.7) | −16 % | **50.2 (19.3) | −18 % | 77.9 (12.3) | 76.8 (21.4) | |||
80 mmHg | **108 (−12.6) | −8.4 % | **98 (27.7) | −20 % | **44.2 (10.7) | −25 % | **40.3 (18.1) | −34 % | 76.5 (13.0) | **69.7 (22.8) | −13.1 % | |