ENS 57926

v t e ENS Event
05:00 Sep 11, 2025
Title	Medical Event
Event Description	The following information was provided by the Minnesota Department of Health via email: On September 11, 2025, a TheraSphere treatment (yttrium-90 microspheres) was performed where the activity in the written directive was 66.15 mCi [and] the measured activity was 64.4 mCi. After the procedure, the licensee measured the residual activity left in the tubing at 33 mCi. Only 47.5 percent of the prescribed activity was delivered. The patient and referring physician were notified. The cause is under review. Notification: 24-hour notification - TheraSphere treatment where the total dose or activity delivered differs from the prescribed dose or activity, as documented in the written directive, by 20 percent or more. State event report ID: MN250005 A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

ENS 57926 +/-
Where
University Of Minnesota Minneapolis, Minnesota (NRC Region 3)
License number:	1049
Organization:	Minnesota Department Of Health
Reporting

Agreement State
Time - Person (Reporting Time:+35.3 h1.471 days <br />0.21 weeks <br />0.0484 months <br />)
Opened:	Brandon Juran 16:18 Sep 12, 2025
NRC Officer:	Robert A. Thompson
Last Updated:	Sep 12, 2025
57926 - NRC Website
v • d • e

v t e Emergency Notification System
University Of Minnesota with Agreement State
WEEKMONTHYEAR2025-09-11T05:00:00 [Table view]
[ENS list for University Of Minnesota]

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