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Table 1 Parameters for simulation in the resting arm finger flexor muscles

From: A novel method to measure regional muscle blood flow continuously using NIRS kinetics information

Term Definition Values Unit comments
THb total hemoglobin ([HbO2] + [Hb]) 98.1 ± 9.3 μM/kg 1
[HbO2] total HbO2 62.3 ± 6.0 μM/kg 1
[HbO2]a arterial HbO2 27.7 μM/kg 2
[HbO2]v venous HbO2 34.6 μM/kg 2
[Hb] total deoxyhemoglobin 35.8 ± 4.3 μM/kg 1
O2 O2 consumption 0.185 ± 0.012 μMHbO2/sec/kg 1
Qa, Qv arterial and venous blood flow 0.276 μMTHb/sec/kg 3
SaO2 arterial saturation 100 % 4
SvO2 venous saturation 49.1 % 5
StO2 tissue saturation 63.5 ± 2.1 % 1
a/v ratio arterial venous blood volume ratio 28.3%/71.7% %/% 2
  1. Comment 1. These values are from NIR measurements using IQ system (mean ± standard error, n = 9).
  2. Comment 2. These are calculated from SvO2 and StO2 which gives arterial venous blood volume ratio of 28.3%/71.7%.
  3. Comment 3. The blood flow is calculated from Eqs. 4–5.
  4. Comment 4. SaO2 is assumed 100%.
  5. Comment 5. SvO2 is assumed 49.1% ([24]).