Diagnostic imaging:
Children ≥12 years and Adolescents: Oral inhalation: 75 to 100 mL Dose Equivalent (DE) via the entire contents of one dose delivery bag. Do not use dose delivery bag if the DE is <75 mL; DE of >100 mL is acceptable.
Note: DE is the total volume (mL) of 100% hyperpolarized, 100% isotopically enriched xenon Xe 129 that would provide the equivalent total Xe 129 magnetization (MRI) signal. DE is measured by the HPX Polarization Measurement Station and is defined by the following formula:
DE = (total volume xenon gas) × (fraction of xenon Xe 129 isotopic enrichment in the xenon gas) × (fraction of hyperpolarization)
There are no dosage adjustments provided in the manufacturer's labeling.
There are no dosage adjustments provided in the manufacturer's labeling.
(For additional information see "Xenon Xe-129 hyperpolarized: Drug information")
Diagnostic imaging: Inhalation: Target dose: 75 to 100 mL dose equivalent (DE); minimum dose: 75 mL DE; >100 mL DE is acceptable. Administer DE in an appropriately sized dose delivery bag.
Dose delivery bag selection: Select the dose delivery bag based on the patient's total lung capacity (TLC) or forced vital capacity (FVC) (if TLC unavailable) (see table).
TLC |
FVCb |
Dose delivery bag |
---|---|---|
a TLC = total lung capacity; FVC = forced vital capacity. | ||
b FVC is used when TLC is unavailable. | ||
c If both TLC and FVC are unavailable, select the dose delivery bag based on estimates of the patient's TLC using the American Thoracic Society-endorsed plethysmography-based predictive equations based on sex and height. | ||
<2 L |
<1.5 L |
300 mL |
2 to <3.3 L |
1.5 to <2.5 L |
500 mL |
3.3 to <5 L |
2.5 to <3.8 L |
750 mL |
≥5 L |
≥3.8 L |
1,000 mL |
DE is the volume (mL) of 100% hyperpolarized, 100% isotopically enriched xenon XE 129 that produces the equivalent net magnetization as the Xe 129 dose and is defined by the following formula:
DE = (total volume xenon gas) × (fraction of xenon XE 129 isotopic enrichment in the xenon gas) × (fraction of hyperpolarization)
where volume of xenon gas is 250 to 750 mL, the fraction of xenon Xe 129 isotropic enrichment is >80% and the mean fraction of hyperpolarization is ≥38% to 54% at the completion of polarization of 250 mL of xenon gas.
There are no dosage adjustments provided in the manufacturer's labeling.
There are no dosage adjustments provided in the manufacturer's labeling.
The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified. Adverse reactions reported in adults.
1% to 10%:
Nervous system: Dizziness, headache
Respiratory: Oropharyngeal pain
There are no contraindications listed in the manufacturer's labeling.
Concerns related to adverse effects:
• Hypoxia: Transient hypoxemia may occur; treat as clinically indicated.
Other warnings/precautions:
• Appropriate use: Has not been evaluated for use with lung perfusion imaging. Concomitant supplemental oxygen may decrease image quality due to depolarization; withhold oxygen inhalation for 2 breaths prior to xenon Xe 129 hyperpolarized inhalation and resume immediately following imaging breath hold.
Transient heart rate elevation, numbness, and tingling have been reported with use in pediatric patients 6 to 18 years of age.
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Gas, Inhalation:
Xenoview: 1% (1 ea)
No
Gas (Xenoview Inhalation)
1% (per each): $62,400.00
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Oral inhalation: Administer within 5 minutes of dose equivalent measurement; refer to the HPX Hyperpolarization System Operator's Manual and/or manufacturer labeling for detailed administration instructions.
Inhalation: Administer by inhalation within 5 minutes of dose equivalent measurement; refer to the HPX Hyperpolarization System Operator’s Manual and manufacturer labeling for detailed administration instructions.
Store at 20°C to 25°C (68°F to 77°F) for ≤5 minutes after final dose equivalent measurement; discard 60 minutes after filling dose delivery bag. Store xenon Xe 129 gas blend at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F).
Contrast agent for use with MRI for evaluation of lung ventilation (FDA approved in ages ≥12 years and adults). Note: Use in patients <12 years of age is not approved because the dose cannot be accurately administered.
None known.
There are no known significant interactions.
Due to minimal absorption following inhalation, maternal use is not expected to result in fetal exposure.
Oxygen saturation; heart rate; signs or symptoms of hypoxemia.
Contrast agent that when inhaled is distributed throughout the ventilated lung and can be used for imaging with a multi-nuclear capable MRI scanner; hyperpolarized xenon Xe 129 nuclei are directly detected by a Xe 129 MRI coil.
Duration: Ventilated areas of the lungs; small amount into pulmonary vessels leading to distal organ distribution. Solubility is greater in fatty tissue than aqueous tissue or body compartments (eg, plasma).
Half-life elimination: 14.5 seconds (75% Xe/25% N2 gas mixture); 14.3 seconds (25% Xe/75% N2 gas mixture).
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