The following information was provided by the
Washington State Office of Radiation Protection via email:
On 6/14/2023, a dose misadministration occurred during high dose rate brachytherapy at the Sacred Heart (SH) Radiotherapy Department. The authorized user (AU) intended for 15 Gy to be delivered in three [separate] 5 Gy fractions, but it was planned and delivered in a single 15 Gy treatment. The incident was discovered around 1630 [PDT] the same day. The AU has informed the patient and the referring physician.
The SH medical physicist noted that 13 Gy in a single fraction is an effective treatment for the patient's condition (keloids on and around both ears). The 15 Gy was delivered to the keloid surface, and skin tolerance in a single fraction is greater than 25 Gy.
Follow up with the patient will be perform in the next few days and ongoing. No other exposure to staff is reported.
WA incident number: WA-23-009
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.