Xenon Xe 133 Gas
"The U.S. Food and Drug Administration today approved Adempas (riociguat) to treat adults with two forms of pulmonary hypertension.
Pulmonary hypertension is caused by abnormally high blood pressure in the arteries of the lungs. It make"...
Xenon Xe 133 Gas
Inhalation of Xenon Xe 133 Gas has proved valuable for the evaluation of pulmonary function and for imaging the lungs. It may also be applied to assessment of cerebral flow.
DOSAGE AND ADMINISTRATION
Xenon Xe 133 Gas is administered by inhalation from closed respirator systems or spirometers.
The suggested activity range employed for inhalation by the average adult patient (70 kg) is: Pulmonary function including imaging: 74-1110 MBq (2-30 mCi) in 3 liters of air. Cerebral blood flow: 370-1110 MBq (10-30 mCi) in 3 liters of air.
The patient dose should be measured by a suitable radioactivity calibration system immediately prior to administration.
The estimated absorbed radiation doses2 to an average patient (70 kg) for pulmonary perfusion and cerebral blood flow studies from a maximum dose of 1110 MBq (30 mCi) of Xenon Xe 133 in 3 liters of air are shown in Table 4.
Table 4. Radiation Doses
|Effective Half-Time||Lunes*||Brain||Whole Body|
|mGy/1110 MBq||(rads/30 mCi)|
|Pulmonary Perfusion||2 min.||2.5(0.25)||0.014(0.0014)||0.027(0.0027)|
|Cerebral Blood Flow||5 min.||6.3(0.63)||0.035(0.0035)||0.068(0.0068)|
|*99% of activity is in lungs.|
2 Method of Calculation: A Schema for Absorbed-Dose Calculation for Biologically Distributed Radionuclides, Supplement No. 1, MIRD pamphlet No. 1, /. Nucl. Med., p.7 (1968).
The Xenon Xe 133 Gas is supplied as part of the Calidose™ system, consisting of 3 mL unit dose vials and the Calidose™ dispenser for shielded dispensing.
Normally vials containing either 370 or 740 MBq (10 or 20 mCi)/vial, packed 1 vial or 5 vials per shield tube, are supplied.
The NDC number for: 10 mCi vial is 11994-127; 20 mCi vial is 11994-128. Store at controlled room temperature 20°-25°C (68°-77°F) [See USP].
This radiopharmaceutical is approved for distribution to persons licensed pursuant to the Code of Massachusetts Regulations 105 CMR 120.100 for the uses listed in 105 CMR 120.547 or 120.552 or under equivalent regulations of the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State.
The contents of the vial are radioactive. Adequate shielding and handling precautions must be maintained.
Lantheus Medical Imaging, 331 Treble Cove Rd., N. Billerica, MA 01862 USA. For Ordering Tel. Toll Free 800-299-3431. (For Massachusetts & International, Call 978-667-9531). All Other Business 800-362-2668
Last reviewed on RxList: 10/11/2011
This monograph has been modified to include the generic and brand name in many instances.
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