Table 1.

The experimental groups.

	Gas	Total pressure (bar)	pO2 (bar)	Drug	No. of rats
Group 1	Air	1.0	0.2	NaCl	10
Group 2	Air	1.0	0.2	5-FU	10
Group 3	Oxygen	1.0	1.0	NaCl	8
Group 4	Oxygen	1.5	1.5	NaCl	8

The hyperbaric oxygen treatement and 5-FU (0.2 mg/kg i.p.) were given on day 1, 4, 7 and 10.