Maa: Yhdysvallat
Kieli: englanti
Lähde: NLM (National Library of Medicine)
HUMAN SERUM ALBUMIN I-131 (UNII: ACH35131L1) (HUMAN SERUM ALBUMIN I-131 - UNII:ACH35131L1)
Iso-Tex Diagnostics, Inc.
IODINATED I-131 SERUM ALBUMIN
IODINATED I-131 SERUM ALBUMIN 1 mCi in 1 mL
INTRAVENOUS
PRESCRIPTION DRUG
MEGATOPE is indicated in adults for use in determinations of total blood and plasma volumes. None Known.
MEGATOPE (iodinated I 131 albumin) injection is a colorless to very pale yellow solution available in multiple-dose vials containing the following amounts of radioactivity on the date of calibration: Complete radioassay data for each vial are provided on the MEGATOPE vial label.
Biologic Licensing Application
MEGATOPE- IODINATED I-131 ALBUMIN INJECTION, SOLUTION ISO-TEX DIAGNOSTICS, INC. ---------- MEGATOPE RX ONLY. DESCRIPTION CHEMICAL CHARACTERISTICS MEGATOPE (iodinated I 131 albumin) injection is a sterile, nonpyrogenic, radioactive diagnostic agent for intravenous use. Each mL contains albumin human (approximately 10 mg), dibasic sodium phosphate (16 mg), guanidine hydrochloride (not more than 0.4 mg), monobasic sodium phosphate (1.6 mg), sodium chloride for isotonicity, and benzyl alcohol (9 mg) as a preservative. The stabilizers acetyltryptophanate and sodium caprylate have a concentration of less than 0.89 mM. The pH has been adjusted to 7.2 to 7.8 with sodium hydroxide or hydrochloric acid. Each vial contains 37 MBq/mL (1,000 microCi/mL) of radioactivity as iodinated I 131 albumin at time of calibration (see HOW SUPPLIED). PHYSICAL CHARACTERISTICS Iodine-131 decays by beta and gamma emissions with a physical half-life of 8.02 days. Photons that are useful for detection and imaging studies are listed in Table 1. Evaluated Nuclear Structure Data File of the Oak Ridge Nuclear Data Project DOE (1985). EXTERNAL RADIATION The specific gamma ray constant for iodine-131 is 2.2 R/hour-millicurie at 1 cm. The first half-value layer is 0.24 cm lead (Pb). A range of values for the relative attenuation of the radiation emitted by this radionuclide that result from interposition of various thicknesses of Pb is shown in Table 2. To facilitate control of the radiation exposure from this radionuclide, the use of a 2.55 cm thickness of Pb will attenuate the radiation emitted by a factor of about 1,000. To correct for physical decay of iodine-131, the fractions that remain at selected 1 intervals after the time of calibration are shown in Table 3. * Calibration time CLINICAL PHARMACOLOGY Following intravenous injection, iodinated I 131 albumin is distributed throughout the intravascular pool within 10 minutes; extravascular distribution takes place more slowly. Iodinated I 131 albumin also can be detected in the lymph and in cer Lue koko asiakirja