TABLE 1. Summary of physiological variables during and after collagenase infusion^*.

Group	Arterial Blood Gas			BP (mm Hg)	HR (per min)
	pH	PO2 (mm Hg)	PCO2 (mm Hg)
during Tx
sham	7.33 ± 0.03	186 ± 15	45 ± 3	81 ± 6	348 ± 40
needle	7.39 ± 0.02	184 ± 21	43 ± 5	89 ± 6	369 ± 28
CI—15 U	7.34 ± 0.05	192 ± 11	44 ± 8	89 ± 8	355 ± 33
CI—0.3 U	7.32 ± 0.03	187 ± 5	46 ± 5	91 ± 5	362 ± 25
30 mins after Tx
sham	7.32 ± 0.01	185 ± 20	48 ± 5	84 ± 6	347 ± 48
needle	7.38 ± 0.05	186 ± 14	44 ± 3	88 ± 8	359 ± 14
CI—0.15 U	7.30 ± 0.08	188 ± 10	48 ± 9	88 ± 10	351 ± 33
CI—0.3 U	7.29 ± 0.03	173 ± 17	50 ± 9	90 ± 5	380 ± 37
24 hrs after Tx
sham	7.50 ± 0.04	192 ± 12	36 ± 5	84 ± 5	348 ± 20
needle	7.52 ± 0.02	181 ± 7	37 ± 7	78 ± 3	361 ± 17
CI—0.15 U	7.47 ± 0.03	188 ± 11	38 ± 4	85 ± 9	359 ± 34
CI—0.3 U	7.38 ± 0.06	179 ± 14	49 ± 9	90 ± 9	329 ± 46
30 days after Tx
sham	7.5 ± 0.06	182 ± 28	37 ± 8	94 ± 4	369 ± 9
needle	7.47 ± 0.03	192 ± 12	36 ± 4	83 ± 5	364 ± 27
CI—0.15 U	7.47 ± 0.03	190 ± 44	35 ± 4	87 ± 2	358 ± 39

^*There was no statistically significant difference between groups. Values are presented as the mean ± SD. Abbreviations: BP = blood pressure; CI = collagen infusion; HR = heart rate; Tx = treatment.