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Table 4 Hemodynamic measurements for five pigs having isovolumetric hemodilution

From: Tissue hemoglobin index: a non-invasive optical measure of total tissue hemoglobin

 

Total hemoglobin concentration

Characteristic

13 g/dl

10 g/dl

7 g/dl

4 g/dl

Number of measurements

3

5

5

5

Arterial total hemoglobin (g/dl)a

13.6 (13 to 14.6)

9.7 (9.3 to 10.5)

6.9 (6.5 to 7.4)

3.9 (3 to 4.7)

Cardiac output (ml/min/kg)

110 ± 47

131 ± 37

160 ± 77

168 ± 98

Femoral artery flow (ml/min/kg)

4.8 ± 1.6

6.0 ± 2.2

5.9 ± 1.9

6.1 ± 2.0

Heart rate (beats/minute)

97 ± 9*4

113 ± 16

127 ± 29

155 ± 39*13

Systolic blood pressure (mmHg)

97 ± 2

99 ± 10

99 ± 10

91 ± 22

Diastolic blood pressure (mmHg)

69 ± 4

65 ± 9

69 ± 13

54 ± 16

Mixed SmvO2 (%)

83.0 ± 4.4*4

73.8 ± 5.5

69.0 ± 11.4

61.2 ± 19.3*13

Hind limb StO2 (%)

89.0 ± 2.8*10 and 7

80.0 ± 6.3*13

82.7 ± 5.6*13

84.1 ± 6.2

Hind limb THI (arbitrary)

8.3 ± 1.1*4

7.8 ± 1.2

7.3 ± 1.0

6.8 ± 1.0*13

  1. Data presented as mean ± standard deviation. a Mean and range shown since the variable was controlled to have no overlap in values. A nonparametric Dunn's multiple comparison test was used to study differences in mean values. *P < 0.05 for the hemoglobin column(s) indicated.
  2. The tissue hemoglobin index was statistically different only when total hemoglobin concentration changed from 13 to 4 g/dl. SmvO2, mixed venous hemoglobin oxygen saturation; StO2, tissue hemoglobin oxygen saturation.
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Critical Care

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