Patient Preparation
- Rule out pregnancy
- Withdraw thyroid medications. (*)
- Avoid: 1) recent ingestion of foods rich in iodine content and 2) use of contrast material in previous weeks.
- Ideally TSH must be over 30 uIU/ml.
- Patient must fast before receiving 131-I orally and wait 3h before resuming any food ingestion.
- Give a laxative the day before to decrease bowel activity.
(*) Not applicable if Recombinant TSH will be used.
References:
1 David V. Becker et al. Procedure Guideline for Extended Scintigraphy for Differentiated Thyroid Cancer 2.0 p: 15-18, Society of Nuclear Medicine MANUAL 2001-2002.
2 Garcia del Rio et al. Cancer Tiroideo Funcionante: Diagnostico y Evolución, p: 185-191 and Wagner J et al. Tratamiento del Cancer Diferenciado del Tiroides con Radioyodop: 193-201 in: Medicina Nuclear Aplicaciones Clínicas. Eds: I. Carrio - P.