| AGREEMENT STATE REPORT - LOST AND RECOVERED I-125 SOURCE|
The following information was obtained from the state of Illinois via email:
"The RSO [radiation safety officer] at the University of Chicago [Hospital], called to report that the University received one lsoAid, Model IAl-125A, I-125 source for a seed localization procedure. It had an activity of 271 microCuries when implanted in the patient on Thursday, April 18, 2019. On Friday, the patient's tissue [containing the I-125 seed was excised] and sent to pathology for evaluation. During all steps, the individuals involved reported that they measured appropriate dose rates from the seed. The Pathology technician was using scissors on the patient's tissue and the seed popped out of the specimen and fell into the sink. The seed was recovered before it went down the drain. Surveys of the sink show no contamination or dose rate measurements. The radiation safety staff measured the recovered source with both a survey instrument and a gamma counter, and the source has no measureable dose rate. The patient was surveyed and it was determined that the source [was] not in the patient.
"A review of the SSDR [sealed source and device registry] sheet has determined that this source contains I-125 adsorbed on a silver rod which is further encased in the outer capsule. The outer capsule measures 3.0 mm x 0.5 mm and there are no visible signs that the source was cut. They plan to take the seed for an x-ray today to determine if the inner rod is missing and to see if there are obvious signs that the outer capsule was breached.
"UPDATE: The I-125 seed was found intact in the sink trap. The source that was initially believed to be the subject seed was from another patient and was a three-year-old prostate seed that had decayed to background."
NMED Item Number: IL190012
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf