The following was received from the
California Department of Public Health via email:
A medical event per 10 CFR 35.3045 was determined to have occurred on July 20, 2021, during a liver cancer therapy procedure using Y-90 Nordion TheraSpheres via manual brachytherapy under 10CFR35.1000.
Dose 1: AU prescribed activity of 109.5 mCi of Y-90 to the patient's liver: right lobe segments 5 and 8 and successfully delivered 104 mCi (95 percent).
Dose 2: AU prescribed 153.0 mCi of Y-90 to the patient's liver: right lobe segments 6 and 7, but could only deliver 68.5 mCi (44.8 percent). During the procedure, blockage occurred in the delivery apparatus, specifically the microcatheter, that the authorized user was unable to clear to complete the procedure.
Pre and post-procedural vial measurements were performed using a calibrated ion chamber by a trained CNMT [Certified Nuclear Medicine Technologist] on July 20, 2021.
5010 Number: 072121
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.