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CYBERONICS, INC. LEAD MODEL 302 Back to Search Results
Model Number 302-20
Event Date 10/26/2013
Event Type  Malfunction  
Event Description

It was reported that device diagnostics resulted in high impedance. It was reported that the patient will be referred to surgeon for revision surgery. No known trauma or patient manipulation occurred that is believed to have caused or contributed to the high impedance. It is unknown if x-rays were performed. Surgery is likely, but has not occurred to date. Attempts to obtain additional information have been unsuccessful to date.

Manufacturer Narrative

Device manufacturing records were reviewed. Review of manufacturing records of the lead confirmed all quality tests were passed prior to distribution. Device failure is suspected, but did not cause or contribute to a death or serious injury.

Event Description

Additional information was received stating that the vns patient¿s device was explanted on (b)(6) 2014. The explanted generator and lead have been returned to the manufacturer where analysis is currently underway.

Event Description

The data dump for the generator identified that the lead impedance changed from 2935 ohms to 13129 ohms on (b)(6) 2013. Analysis of the lead was completed on (b)(4) 2014. Note that the electrodes were not returned for analysis; therefore a complete evaluation could not be performed on the entire lead product. During the visual analysis what appeared to be pitting was observed on the connector pin surface. Eds (energy dispersion spectroscopy ¿ provides chemical or element identity/composition analysis) was performed on the connector pin pit deposit and identified the area as consisting of chromium, iron, nickel, silicon, fluorine, sodium, potassium, aluminum and molybdenum. Another eds procedure was performed on the clean surface of the connector pin and identified the area as consisting of chromium, iron, nickel, silicone and molybdenum. A definite cause for the pitting could not be determined based on the lead portion returned. The slice mark and abraded opening found on the outer silicone tubing, 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 that which typically exists following an explant procedure. No other 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 portions were performed, during the visual analysis, and no discontinuities were identified. The generator analysis will be reported in mfr. Report #1644487-2014-00731.

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Brand NameLEAD MODEL 302
Type of DeviceLEAD
Manufacturer (Section D)
100 cyberonics blvd
houston TX 77058 770
Manufacturer (Section G)
100 cyberonics blvd
suite 600
houston TX 77058
Manufacturer Contact
njemile crawley
100 cyberonics blvd
suite 600
houston , TX 77058
MDR Report Key3608939
Report Number1644487-2014-00360
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup,Followup
Report Date 01/09/2014
1 Device Was Involved in the Event
0 PatientS WERE Involved in the Event:
Date FDA Received02/05/2014
Is This An Adverse Event Report? No
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date02/28/2010
Device MODEL Number302-20
Device LOT Number200444
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer02/25/2014
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received03/24/2014
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured02/28/2007
Is The Device Single Use? Yes
Is this a Reprocessed and Reused Single-Use Device? No
Type of Device Usage Initial