Comparative Pharmacology
Head-to-head clinical analysis: MACROTEC versus XENON XE 133 V S S.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MACROTEC versus XENON XE 133 V S S.
MACROTEC vs XENON XE 133-V.S.S.
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Not applicable for diagnostic use.
Xenon Xe-133 is a radioactive gas that emits beta and gamma radiation. It distributes to the lungs and is used for ventilation-perfusion imaging. Its mechanism is based on regional distribution in the lungs, reflecting ventilation. It does not have pharmacological activity.
5 mCi (185 MBq) intravenously as a single dose for lung perfusion imaging.
5-10 mCi (185-370 MBq) inhaled as a single dose for pulmonary ventilation imaging.
None Documented
None Documented
6 hours; prolonged in renal impairment (up to 30 hours in ESRD)
Terminal elimination half-life of approximately 3.5 minutes, corresponding to rapid washout from lungs following cessation of inhalation.
Renal: 95% as unchanged drug; biliary/fecal: <5% as metabolites
Eliminated almost entirely via exhalation through the lungs (>95%); negligible renal or biliary/fecal excretion.
Category C
Category C
Radiopharmaceutical
Radiopharmaceutical