Koncentrationer af perflutren i blodet vistes at falde mono - eksponentielt med en gennemsnitlig halveringstid på 1, 3 minutter hos raske frivillige og 1, 9 minutter hos KOL- patienter.
Perflutren concentrations in blood were shown to decline in a mono-exponential fashion with a mean half-life of 1.3 minutes in healthy subjects and 1.9 minutes in COPD subjects.