Table 1 Dynamic parameters. Changes in respiratory variation in power, flow and pressure parameters, both during spontaneous breathing and NPPV
Power parameters, dynamic | ||||||||
Delta PWRmax (*10-2) | Delta PWR-integral (*10-2) | |||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 11.3 (7.0) | 16.4 (7.6) | 18.3 (8.9) | 20.8 | ||||
20 mmHg | *14.3 (11.6) | +27 % | 16.2 (6.9) | 19.7 (17.6) | 20.3 | |||
40 mmHg | **16.3 (9.4) | +44 % | 16.4 (7.7) | 21.6 (13.7) | *26 (15.4) | +25 % | ||
60 mmHg | *15.7 (8.9) | +39 % | **20.6 (9.0) | +26 % | 22.8 (12.3) | *25.9 (14) | +25 % | |
80 mmHg | **21.6 (11.8) | +91 % | **27.1 (9.7) | +65 % | **30.7 (23.2) | +68 % | **39.9 (22.2) | +92 % |
Flow parameters, dynamic | ||||||||
Delta peak aortic flow (*10-2) | Delta stroke volume (*10-2) | |||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 8.9 (6.0) | 14 (7.2) | 15.8 (7.8) | 20.1 (11.7) | ||||
20 mmHg | **12.3 (9.0) | +38 % | 14.5 (7.3) | 17.4 (17.1) | 19.2 (11.4) | |||
40 mmHg | **14.6 (9.2) | +64 % | 14.6 (7.3) | 20.4 (14.9) | *25.3 (16.6) | +26 % | ||
60 mmHg | **13 (7.6) | +46 % | 15.4 (8.3) | *22.5 (14.6) | +42 % | *25.9 (14.0) | +29 % | |
80 mmHg | **18.1 (10.7) | +103 % | **20.3 (7.9) | +45 % | **30.4 (23.3) | +92 % | **40.6 (23.7) | +102 % |
Pressure parameters, dynamic | ||||||||
Delta systolic pressure (*10-2) | Delta pulse pressure (*10-2) | |||||||
Spontaneous breathing | NPPV | Spontaneous breathing | NPPV | |||||
Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | Mean (sd) | Change | |
Baseline | 3.8 (2.6) | 4.3 (2.6) | 7.5 (4.5) | 6.8 (6.0) | ||||
20 mmHg | 4.5 (2.6) | 4.7 (2.5) | 8.2 (5.6) | 8 (4.9) | ||||
40 mmHg | 4.7 (3.8) | *5.5 (2.6) | +28 % | 8.2 (6.9) | *8.9 (5.0) | +31 % | ||
60 mmHg | *5.3 (3.5) | +39 % | *7.3 (3.8) | +70 % | 8.7 (6.7) | **13.1 (8.0) | +93 % | |
80 mmHg | **6.7 (3.8) | +76 % | **10 (4.3) | +133 % | **10.8 (5.8) | +44 % | **14.9 (6.5) | +119 % |