Table 2. Population averages for measured and derived parameters (mean±s.d.), calculated for the entire duration of each maneuver.
| Parameter | Normocapnia/NTC | Normocapnia/TC | Hypercapnia/NTC | Hypercapnia/TC | P-values (ANOVA) |
|---|---|---|---|---|---|
| mABP (mm Hg) | 88.4±14.7 | 91.0±13.1 | 93.5±16.9 | 94.7±16.1 | P=0.020 |
| CBFVL (cm/s) | 53.6±12.2 | 55.2±12.1 | 65.4±15.6 | 70.7±14.2 | P<10−4 |
| CBFVR (cm/s) | 52.7±14.1 | 54.6±11.9 | 63.9±15.9 | 66.6±14.3 | P<10−4 |
| EtCO2 (mm Hg) | 39.8±3.1 | 38.0±3.1 | 45.9±2.9 | 46.8±2.8 | P<10−4 |
| HR (b.p.m.) | 69.1±8.0 | 68.3±7.3 | 70.9±6.6 | 71.4±6.7 | P=0.001 |
| ARIL | 6.1±1.5 | 6.2±1.0 | 4.4±1.5 | 4.1±1.4 | P<10−4 |
| ARIR | 6.2±1.3 | 6.1±0.9 | 4.8±1.9 | 4.3±1.6 | P<10−4 |
Abberviations: ANOVA, analysis of variance; ARIL, autoregulation index value obtained from CBFV recordings of the left MCA; ARIR, autoregulation index value obtained from CBFV recordings of the right MCA; b.p.m., beats per minute; CBFV, cerebral blood flow velocity; EtCO2, end-tidal CO2; mABP, mean ABP; NTC, no thigh cuffs; TC, thigh cuffs.