Table I.

Oxygen and carbon dioxide in volumes percent

Dog No.	Day postop.	Hematocrit (%)	Arterial		Portal vein		Vena cava		Hepatic vein
			CO2	O2	CO2	O2	CO2	O2	CO2	O2
1	106	41	—	14.62	—	10.15	—	11.76	—	7.10
2	125	44	32.84	16.74	40.75	8.29	34.52	13.16	37.87	9.98
3	99	33	—	—	42.26	9.48	45.20	8.64	43.95	5.95
4	96	36	33.88	12.39	37.36	10.15	36.13	10.48	37.37	7.00
5*	14	28	24.63	14.61	25.54	12.20	28.34	10.47	29.99	7.14
6	14	41	28.68	15.25	34.15	9.41	31.62	11.90	32.97	8.95
7	14	45	33.93	16.21	36.24	11.97	36.31	14.09	36.98	11.67
8	14	35	31.87	13.97	36.71	7.96	33.86	11.83	35.15	8.26
9	15	44	33.89	16.73	41.08	13.44	36.07	15.58	35.79	12.25
10	11	45	34.76	14.82	40.18	8.48	38.20	12.20	38.66	8.76
11	12	46	29.06	17.16	33.30	13.97	32.40	16.20	34.00	13.70
12	12	45	30.50	15.57	35.44	9.73	34.66	14.25	34.89	11.62
13	12	44	34.00	15.89	38.63	10.28	37.09	12.70	36.96	10.89
Average		40.5	31.64	15.33	36.80	10.42	35.36	12.55	36.21	9.48
Standard deviation		5.7	3.1	1.4	4.5	1.9	4.1	2.1	3.4	2.4

^*Significant hemorrhage during vessel catheterization.