It was reported that a patient transported from the emergency department with symptoms consistent with myocardial infarction in stable/guarded condition, was undergoing a coronary angiography examination when the system lost gantry motion.The system was rebooted and recovered after about 10 minutes.The system regained all functionality and intervention procedures were attempted for several hours.Due to severe coronary calcifications, a stent could not be placed.Despite life saving measures, the patient expired.
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On (b)(6) 2016, patient was presented from the emergency department with symptoms consistent with myocardial infarction in stable/guarded condition.Patient was not tolerating exam well and complained of pain.Diagnostic portion of the exam was complete.Triple vessel disease was present.The exam continued for about 10 min and gantry movement froze with error message on the monitor.The system regained all functionality within 6 min after a system off/on and intervention was continued for 2 hours.Due to severe coronary calcifications, a stent could not be placed.The patient was coded in the room, consistent with acls standards, intubated, intra-aortic balloon pump placed.Despite life saving measures, patient expired.Although there was no x-ray inhibit and table movement was available, due to non-availability of the gantry axis, system contributed to about 6 minutes delay in the procedure but it cannot be determined if it contributed to the patient death.The investigation concluded that this error was due to the smart box which generated an ?enable? signal and prevented gantry motions.However, autopsy of the part was conducted but the issue could neither be reproduced nor any signs of wearing, aging or other faults that could explain the random enable signal which prevented motions.The analysis of the system design concluded that the root cause for the random error seen may be due to a temporary issue with the l-arm enable sense circuit of the smart box.No defect was found with the design of the system.Smart box was proactively replaced.Neither corrective nor preventive action has been deemed necessary.
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