Table 4.

Pa_CO2 and CO₂ sensitivity for all cannula-implantation groups

	Resting PaCO2, Torr			CO2 Sensitivity, l·min−1·Torr−1
Study	LPBN	MPBN	KFN	LPBN	MPBN	KFN
Preimplant	39.6 ± 0.4	41.6 ± 0.7	41.2 ± 0.7	2.67 ± 0.31	2.07 ± 0.18	2.36 ± 0.28
Postimplant	40.3 ± 1.5	43.1 ± 1.8	39.7 ± 0.4	2.41 ± 0.21	1.82 ± 0.26	1.98 ± 0.24
Post-Atr MD	41.3 ± 0.7	43.8 ± 1.8	39.9 ± 0.6	2.34 ± 0.21	1.83 ± 0.28	2.15 ± 0.26
Post-IA injection	40.5 ± 1.7	39.9 ± 0.6	38.9 ± 1.0	2.19 ± 0.21	2.12 ± 0.17	2.22 ± 0.20

Values are means ± SE. CO₂ sensitivity is defined as the slope of the relationship between pulmonary ventilation (l/min) and Pa_CO2 (Torr). For all cannula-implantation groups, the resting arterial Pco₂ (Pa_CO2) and CO₂ sensitivity were unaffected by cannula implantation, MD of Atr, or injection of IA perturbations. Furthermore, there was no significant difference between the 3 groups of goats.