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Table 3 Arterial pressure variations with different airway resistors during head-up tilt

From: Can a central blood volume deficit be detected by systolic pressure variation during spontaneous breathing?

 

No resistor (%)

Inspiratory resistor (%)

Expiratory resistor (%)

Inspiratory/expiratory resistor (%)

Systolic pressure variation

17 ± 11

26 ± 14*

26 ± 18*

28 ± 14*

Stroke volume variation

15 ± 8

19 ± 8

23 ± 7*

29 ± 12*

Pulse pressure variation

7 ± 4

9 ± 6

8 ± 6

10 ± 6*

  1. Values are mean ± standard deviation. *P < 0.05 compared to no resistor
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