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U.S. Department of Health and Human Services

MAUDE Adverse Event Report: CYBERONICS, INC. PULSE GEN MODEL 105 GENERATOR

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CYBERONICS, INC. PULSE GEN MODEL 105 GENERATOR Back to Search Results
Model Number 105
Event Date 02/25/2014
Event Type  Injury  
Event Description

Clinic notes were received for the vns patient¿s neurosurgery consultation on (b)(6) 2014. The notes indicate that the patient was experiencing a recent increase in seizures along with a shocking sensation at the generator site; therefore, the patient was admitted to the hospital through the emergency room on (b)(6) 2014. The patient stated that his seizure frequency had increased from five seizures a day to a seizure every hour. The baseline seizures appeared to last approximately 15 seconds and were tonic-clonic or absence seizures. Radiology reported that neck x-rays showed that lead wires were ¿off. ¿ chest x-rays were reported to be unremarkable. Operative notes were received stating that the patient underwent generator and lead replacement surgery on (b)(6) 2014. The notes indicate that the patient was experiencing a shocking sensation in his neck with stimulation. Imaging revealed abnormal placement of the lead electrodes. The generator was replaced during the procedure as it was nearing end of service. An implant card was received stating that the lead was replaced due to lead discontinuity. Diagnostic results with the replacement generator and lead revealed lead impedance within normal limits (impedance value ¿ 1906 ohms). Review of the available programming and diagnostic history showed normal diagnostic results through (b)(6) 2012. Attempts for additional relevant information were made, but have been unsuccessful to date. The explanted generator and lead have been returned to the manufacturer where analysis is currently underway.

 
Event Description

Analysis of the returned generator and lead was completed. Analysis of the returned generator showed no signs of variation in the pulse generator¿s output signal and demonstrated that the device provided the expected level of output current. The pulse generator diagnostics were as expected for the programmed parameters. In addition, a comprehensive automated electrical evaluation showed that the pulse generator performed according to functional specifications. There were no performance or any other type of adverse conditions found with the pulse generator. Review of the as-received internal device data showed high impedance never occurred. Analysis of the returned lead portion found abraded openings on the outer silicone tubing which most likely provided the leakage path for the dried remnants of what appeared to have once been body fluids inside the outer silicone tubing. The condition of the returned lead portion is consistent with conditions that typically exist following an explant procedure. No obvious anomalies were noted. The setscrew marks found on the lead connector pin provide evidence that, at one point in time, a good mechanical and electrical connection was present. Continuity checks of the returned lead portion were performed, during the visual analysis, with no discontinuities identified. Based on the findings, there is no evidence to suggest an anomaly with the returned portion of the device which may have contributed to the stated complaints. Note that since the electrode array section was not returned for analysis, an evaluation cannot be made on that portion of the lead.

 
Manufacturer Narrative

Review of the available programming and diagnostic history. Device failure is suspected, but did not cause or contribute to a death.

 
Manufacturer Narrative

Adverse event and/or product problem; corrected data: additional information indicates that a device malfunction did not occur. Brand name; corrected data: additional information indicates that the suspect device is the generator. Type of device, name; corrected data: additional information indicates that the suspect device is the generator. Model #, serial #, lot#, expiration date; corrected data: additional information indicates that the suspect device is the generator. Date of implant; corrected data: additional information indicates that the suspect device is the generator. Type of reportable event; corrected data: additional information indicates that a device malfunction did not occur. Device manufacture date; corrected data: additional information indicates that the suspect device is the generator.

 
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Brand NamePULSE GEN MODEL 105
Type of DeviceGENERATOR
Manufacturer (Section D)
CYBERONICS, INC.
100 cyberonics blvd
houston TX 77058 770
Manufacturer (Section G)
CYBERONICS, INC.
100 cyberonics blvd
suite 600
houston TX 77058
Manufacturer Contact
njemile crawley
100 cyberonics blvd
suite 600
houston , TX 77058
2812287200
MDR Report Key3701858
Report Number1644487-2014-00776
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup
Report Date 02/25/2014
1 Device Was Involved in the Event
1 Patient Was Involved in the Event
Date FDA Received03/26/2014
Is This An Adverse Event Report? Yes
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date02/28/2014
Device MODEL Number105
Device LOT Number202126
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer03/12/2014
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received03/27/2014
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured05/08/2012
Is The Device Single Use? Yes
Is this a Reprocessed and Reused Single-Use Device? No
Type of Device Usage Initial

Patient TREATMENT DATA
Date Received: 03/26/2014 Patient Sequence Number: 1
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