Table 1.

Measured physiological parameters and CBF derived from fitting the measured temperature profiles to the theoretical model

	Physiological Parameters
Rat	pH	MABP, mmHg	Paco2 Torr	Pao2 Torr	Δ, cm	Derived CBF, ml·g-1·min-1
1	7.353	90	48.4	83	0.30	0.85
2	7.355	82	43.7	78	0.35	0.62
3	7.410	75	45.2	127	0.38	0.52
4	7.371	90	48.8	76	0.29	0.89
5	7.383	80	48.0	89	0.35	0.61
6	7.430	78	45.8	82	0.36	0.57
7	7.376	89	47.3	109	0.29	0.93
8	7.316	88	58.9	77	0.28	0.97
9	7.391	100	49.0	86	0.27	1.03
10	7.354	102	56.9	116	0.26	1.15
Average	7.374	87	49.2	92	0.31	0.81
± SD	0.032	9	4.9	18	0.04	0.22

Constants used in the model, Eq. 1, to calculate cerebral blood flow (CBF): tissue density (ρ) = 1.0 g/cm³, density of blood (ρ^b) = 1.05 g/cm³, specific heat of blood (c_b) = 3.8 J·g^-1·°C^-1, tissue thermal conductivity (K) = 5.03·10^-3W·cm^-1·°C^-1. Significant correlation of CBF with both mean arterial blood pressure (MABP) and arterial P_co2 (Pa_co2) was found (Eq. 4, R² = 0.96). Pa_o2, arterial Po₂; Δ, characteristic shielding length.