TABLE 1.

Summary of Release Criteria, Required Instructions to Patients, and Records to Be Maintained*

Patient groupBasis for releaseCriteria for releaseInstructions neededRelease records required
All patients, including patients who are breastfeeding1. Administered activity   2. Retained activityAdministered activity of 131I <33 mCi Retained activity of 131I <33 mCiYes, if administered 131I >7 mCi Yes, if retained 131I >7 mCiNo   Yes, see Regulatory Guide
3. Measured dose rateMeasured dose rate from 131I <7 mrem/hYes, if dose rate 131I >2 mrem/hYes, see Regulatory Guide
4. Patient-specific calculations131I calculated dose to other than patient <500 mremYes, if calculated 131I dose >100 mremYes, see Regulatory Guide, and discussed below
Patients who are breastfeedingAll the above bases for releaseYes, complex, see Regulatory GuideYes, complex, see Regulatory Guide

  • ↵* Synopsis of Table 4 from U.S. Nuclear Regulatory Guide 8.39.