Comparison of sulfobromophthalein and indocyanine green clearances in the dog.

Sulfobromophthalein (BSP) and indocyanine green (ICG) were given in single-dose IV injections to dogs and plasma disappearances were measured. The BSP was given at a dose of 5 mg/kg of body weight, and ICG was given at doses of 1.0 and 1.5 mg/kg. The half-life for BSP was 4.2 +/- 0.8 minutes, and for ICG at the 1.0 mg/kg dose, 9.0 +/- 2.0 minutes, and at the 1.5 mg/kg dose, 8.4 +/- 1.9 minutes. The disappearance rate (percentage per minute) for BSP was 17.0 +/- 3.2, and for ICG at the small dose level, 8.1 +/- 1.7, and at the large dose level, 8.7 +/- 2.2. The clearances (ml/min/kg) for BSP were 15.4 +/- 6.2 and for ICG at the small dose level, 3.7 +/- 0.7, and at the large dose level, 3.9 +/- 0.7. The 30-minute percentage retentions for BSP were 1.9 +/- 1.1 and for ICG at the small dose level, 14.7 +/- 5.0, and for ICG at the large dose level, 11.4 +/- 3.0. All of the differences between BSP and ICG means for these values measured were statistically significant (P less than 0.01). There were no significant differences between sexes or between the ICG doses for any of the values (P greater than 0.05).