Table 3.

Arterial blood gas results.

	paO2 (mmHg)			SaO2 (%)			paCO2 (mmHg)			pH
Subject	Pre-Dive	40 m	Post-Dive	Pre-Dive	40 m	Post Dive	Pre-Dive	40 m	Post Dive	Pre-Dive	40 m	Post Dive
1	92	290	73	98	100	95	34.0	44.3	33.8	7.50	7.30	7.46
2	101	218	67	98	100	93	37.4	31.9	37.3	7.46	7.45	7.42
3	89	75	93	97	94	98	38.1	46.5	35.7	7.43	7.36	7.43
4	86	261	102	97	100	98	43.3	49.3	39.3	7.42	7.38	7.48
5	97	61	53	98	94	88	35.2	27.4	35.8	7.44	7.51	7.43
6	97	282	79	98	100	96	38.3	56.8	39.8	7.43	7.30	7.40
Mean	93.7	197.8∗	77.8†	97.6	98	94.6	37.7	42.7	36.9	7.44	7.38	7.42
SD	5.6	103.7	17.7	0.5	3.0	3.7	3.2	12.3	1.9	0.01	0.08	0.02
	${\mathrm{HCO}}_{\mathrm{3}}^{\mathrm{-}}$ (mmol/L)			BE, ecf (mmol/L)			tCO2 (mmol/L)			Lactate (mmol/L)
Subject	Pre-Dive	40 m	Post-Dive	Pre-Dive	40 m	Post Dive	Pre-Dive	40 m	Post Dive	Pre-Dive	40 m	Post Dive
1	26.5	26.7	24	3	2	0	28	28	25	0.7	1.8	1.9
2	26.3	22.1	24	2	-2	-1	27	23	25	1.05	1.5	2.7
3	25.3	26.1	23.8	1	1	0	26	28	25	0.9	1.07	2.1
4	27.8	29.4	25.3	3	4	1	29	31	27	0.5	1.1	2.2
5	23.9	21.7	23.7	0	-1	-1	25	22	25	0.4	1.4	2.7
6	25.2	28.2	24.4	1	2	0	26	30	26	0.6	1.05	1.2
Mean	25.8	25.7	24.2	1.6	1	-0.1	26.8	27	25.5	0.7	1.3¥	2.1§ #
SD	1.3	3.1	0.5	1.2	2.1	0.7	1.4	3.6	0.8	0.2	0.3	0.5

Partial pressure of carbon dioxide (paCO₂), arterial oxygen Saturation (SaO₂ %), partial pressure of oxygen (paCO₂), pH, bicarbonate (HCO₃^-), base excess of extracellular fluid (BE-ecf), total carbon dioxide (tCO₂), and lactate. ^∗P < 0.05 vs. Pre-Dive; ^†P < 0.05 vs. 40 m; ^§P < 0.001 vs. Pre-Dive; ^#P < 0.001 vs. 40-m; ^¥P < 0.05 vs. 40-m.