Intrathecal chemotherapy dosage is based on which parameter?

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Prepare for the CPHON Chemotherapy Test with interactive materials. Use flashcards and multiple choice questions with hints and explanations. Get exam-ready!

Multiple Choice

Intrathecal chemotherapy dosage is based on which parameter?

Explanation:
Intrathecal chemotherapy dosing is guided by the amount of drug exposure the CSF will receive, which closely tracks CSF volume. In pediatric patients, CSF volume changes with age—younger kids have smaller CSF spaces and older children have larger ones. Base the dose on age to approximate a similar CSF concentration across the age range, helping to achieve effective CNS exposure while minimizing toxicity. Body surface area or weight/height don’t reliably reflect CSF volume, so they aren’t the primary basis for intrathecal dosing.

Intrathecal chemotherapy dosing is guided by the amount of drug exposure the CSF will receive, which closely tracks CSF volume. In pediatric patients, CSF volume changes with age—younger kids have smaller CSF spaces and older children have larger ones. Base the dose on age to approximate a similar CSF concentration across the age range, helping to achieve effective CNS exposure while minimizing toxicity. Body surface area or weight/height don’t reliably reflect CSF volume, so they aren’t the primary basis for intrathecal dosing.

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