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It was reported that the patient experienced inadequate pain relief from the device.Additionally, increasing the stimulation to higher settings resulted in undesired sensations, including foot twitching and a rubber band-like sensation, which made walking difficult.The patient underwent implantable pulse generator (ipg) explant procedure.
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Investigation result:
the device was not returned to boston scientific for analysis.Device history record:
it was confirmed this device met manufacturing specification prior to distribution and there were no manufacturing deviations which could have contributed to the reported event.Labeling review:
a labeling review did not reveal any anomalies as it states: system failure, which can occur at any time due to random failure(s) of the components or the battery.These events, which may include device failure, lead breakage, hardware malfunctions, loose connections, electrical shorts or open circuits and lead insulation breaches, can result in ineffective pain control and undesirable stimulation may occur over time due to cellular changes in tissue around the electrodes, changes in electrode position, loose electrical connections and/or lead failure are a known risks of implanting a pulse generator as part of a system to deliver spinal cord stimulation.Risk review:
a risk review was completed and confirmed that the event of stimulation inadequate, difficult to upgrade ipg firmware was defined in the risk documentation.This event type has been accounted for during product risk analysis to support acceptable risk benefit for the product.Investigation conclusion:
based on a thorough review of the reported complaint, an investigation conclusion code of known inherent risk of device was assigned to the investigation for all components.
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