Evaluation summary: incident investigation determined the reported pt mistreatment issue was limited to one (1) user at one (1) hosp site.
The error has been determined to be use error, caused by the user including a radiation block holding tray in treatment plans but omitting the tray during actual radiation treatment.
Omission of the tray by the radiation therapist led to overdosing 25 pts by 3% to 13.
5% of the prescribed dose.
The hosp has determined that the error occurred because the radiation therapist did not use the prescribed block tray during treatments.
Adac pinnacle product labeling was reviewed and determined to be adequate in describing the required use of the block holding tray and its effect on the dose calculation.
The adac pinnacle product only develops a treatment plan and is not a therapy treatment device itself.
The adac pinnacle product performed as intended and generated treatment plans that included the addition of a block holding tray.
The user of the tray is clearly indicated both within the software application, and on the printed report of the plan.
There were no product malfunctions involved with the reported events.
The tray acts to hold beam blocks, which were not required in these treatment plans.
The tray attenuates the beam when used and, to compensate, the dosage is increased in the adac pinnacle calculations.
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