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Table 3 PPV and SVV during different levels of central hypovolemia and different respiratory rates

From: Non-invasive detection of hypovolemia or fluid responsiveness in spontaneously breathing subjects

 

Baseline

−20 mmHg LBNP

−40 mmHg LBNP

PPV 6 (%)

13 ± 5

16 ± 7

20 ± 8##

PPV 15 (%)

7 ± 3**

8 ± 4**

11 ± 4##§**

SVV 6 (%)

15 ± 5

20 ± 10

26 ± 12##

SVV 15 (%)

12 ± 4*

13 ± 5*

15 ± 6*

  1. Data are calculated from 1 minute recordings (so from 6 and 15 respiratory cycles) at 6/min (PPV 6, SVV 6) and 15/min (PPV 15, SVV 15) patterned breathing and are given as mean ± SD.
  2. ##baseline vs. -40 mmHg, p < 0.001.
  3. §-20 vs −40 mmHg, p < 0.05.
  4. *6 vs 15/min patterned breathing, p < 0.05.
  5. **6 vs 15/min patterned breathing, p < 0.001.
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BMC Anesthesiology

ISSN: 1471-2253

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