The following was received via e-mail:
At approximately 11:00 am on November 10, 2010, the Minnesota Department of Health was notified of a medical event that occurred at Mayo Clinic. Mayo Clinic reports during a biliary LDR treatment using Iridium-192, the catheter and guide wire moved and the radioactive sources moved out of position approximately 7 cm distal to the treatment location (still in the bile duct). The oncologist noticed the guide wire had moved at approximately 10:30 am on November 10, 2010, at that point the RSO was notified. It was determined that the intended treatment site received only 1.24 Gy of the intended dose of 20.0 Gy, making this a reportable event.
MDH will continue to investigate and will do an on-site visit during the week of November 15. More information to follow.
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.