The following information was provided by the State of
California via email:
The RSO [Radiation Safety Officer] of Loma Linda Medical Center notified the RHB [Radiologic Health Branch] Brea ICE [Inspection, Compliance and Enforcement] office on August 7, 2017, that a medical event occurred on Friday, August 4, 2017. A patient was admitted to the hospital for treatment of liver carcinoma. The treatment plan involved use of Nordion model TheraSpheres (Y-90 glass microspheres manual brachytherapy) for radio-embolism to the right lobe of the liver. The patient's written directive called for aggregate treatment of 121Gy (5.241 GBq) of Y-90 to the right lobe target area, but only 9.7 Gy (0.420 GBq) was delivered. The overall percent delivery to target tissue was 8.1%.
The patient's lung dose from shunting was 1.01 Gy at 4.8% lung shunting factor. The patient and referring physician were informed of the event on 8/4/2017. The medical event is still being investigated, but is thought that a slow injection flowrate may have caused sedimentation of the microspheres in the delivery system. After a few days for decay, a more intensive review of the delivery system will be conducted.
CA 5010 Number: 080417
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.