Table 1.
Microvascular PO2 during Lo- and Hi-contraction protocols
| Sol | MG | WG | |
|---|---|---|---|
| Lo-contraction protocol | |||
| Baseline PmvO2, i.e. resting (mmHg) | 33.1 ± 3.2 | 22.5 ± 1.0* | 19.0 ± 1.3*† |
| Nadir PmvO2 (mmHg) | 19.0 ± 2.3 | 13.5 ± 1.5*§ | 11.6 ± 1.2*§ |
| Steady-state PmvO2 (mmHg) | 19.0 ± 2.3 | 15.3 ± 1.3* | 12.2 ± 1.1* |
| PmvO2 undershoot (mmHg) | 0 | 2.9 ± 0.7* | 1.4 ± 0.2* |
| Occurrence of undershoot (%) | 0 | 63 | 43 |
| ΔPmvO2 (mmHg) | 14.2 ± 1.4 | 9.0 ± 1.5* | 7.3 ± 1.4* |
| Time delay (s) | 19.6 ± 3.3 | 7.1 ± 0.8* | 9.4 ± 3.3* |
| Time constant (s) | 32.5 ± 4.2 | 14.7 ± 4.2* | 22.1 ± 2.3* |
| ΔPO2/dt (mmHg s−1) | 0.5 ± 0.1 | 0.8 ± 0.2 | 0.4 ± 0.1 |
| MRT (s) | 52.0 ± 6.2 | 21.8 ± 4.4* | 31.5 ± 3.5* |
| Hi-contraction protocol | |||
| Baseline PmvO2 (mmHg) | 29.2 ± 1.5 | 25.1 ± 1.1* | 19.5 ± 1.6*† |
| Nadir PmvO2 (mmHg) | 18.7 ± 1.8 | 8.9 ± 1.2*‡ | 9.3 ± 1.1* |
| Steady-state PmvO2 (mmHg) | 18.7 ± 1.8 | 10.2 ± 1.6*‡ | 9.9 ± 1.1* |
| PmvO2 undershoot (mmHg) | 0 | 3.5 ± 1.8* | 1.3 ± 0.5* |
| Occurrence of undershoot (%) | 0 | 43 | 43 |
| ΔPmvO2 (mmHg) | 10.4 ± 1.3‡ | 16.2 ± 1.7*‡ | 10.3 ± 1.8‡ |
| Time delay (s) | 12.9 ± 4.9 | 5.3 ± 1.0* | 4.6 ± 0.8* |
| Time constant (s) | 26.0 ± 5.9 | 6.9 ± 1.2*‡ | 11.3 ± 2.3*‡ |
| dPO2/dt (mmHg s−1) | 0.5 ± 0.1 | 3.2 ± 0.9*‡ | 1.1 ± 0.3‡ |
| MRT (s) | 38.9 ± 5.7‡ | 12.1 ± 1.5*‡ | 16.2 ± 2.8*‡ |
Values are presented as means ± s.e.m.
*
Significant difference from Sol;
†
denotes significant difference from MG;
‡
denotes significant difference between Lo and Hi;
§
indicates difference between nadir and steady-state value.