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CYBERONICS, INC. LEAD MODEL 302 Back to Search Results
Model Number 302-20
Event Date 11/06/2013
Event Type  Malfunction  
Event Description

On (b)(6), 2013 it was reported that the patient underwent generator replacement that day and during surgery, high impedance was discovered. The patient was scheduled for a lead revision surgery on (b)(6) 2013. It was reported that the patient¿s generator had been prophylactically replaced on (b)(6)2013 and the lead replaced on (b)(6) 2013 due to the high impedance observed during the prophylactic generator replacement surgery. After replacement, system diagnostics showed results within normal limits. The explanted products have not been returned for product analysis to date. Generator replacement captured on mfr. Report # 1644487-2011-01493. Device manufacturing records were reviewed. Review of manufacturing records confirmed that the lead passed all functional tests prior to distribution.

Manufacturer Narrative

Device failure is suspected, but did not cause or contribute to a death or serious injury.

Event Description

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 the (-) connector pin quadfilar coil appeared to be broken approximately 172mm from the end of the connector boot. Scanning electron microscopy was performed and identified the area as having evidence of being worn to the point of fracture with flat spots on the coil surface. What appeared to be pitting was observed on one of the broke coil strands. It is believed that stimulation was present for a certain period of time as evidenced by the presence of metal pitting on one of the broken coil strands. Low magnification sem analysis of the quadfilar coil shows characteristics typical of a lead discontinuity which may include: material fracture, rough or pitted surface, thinned material thickness, electro-etching or material dissolution. The abraded opening and slice marks 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 abraded opening found on the (-) connector pin inner silicone tubing most likely provided the leakage path for the dried remnants of what appeared to have once been body fluids inside the inner silicone tubing. There was no obvious path found for the fluid ingress observed inside the (+) connector ring inner silicone tubing. What appeared to be white deposits were observed on one of the inner silicone tubes. Eds (energy dispersion spectroscopy ¿ provides chemical or element identity/composition analysis) was performed and identified the deposit as containing silicon, phosphorus, potassium, sulphur and calcium. With the exception of the observed discontinuity, the condition of the returned lead portion is consistent with conditions that typically exist 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 portion were performed, during the visual analysis, and no other discontinuities were identified.

Manufacturer Narrative

Device failure occurred, but did not cause or contribute to a death.

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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 Key3494941
Report Number1644487-2013-03656
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup
Report Date 11/06/2013
1 Device Was Involved in the Event
0 PatientS WERE Involved in the Event:
Date FDA Received12/02/2013
Is This An Adverse Event Report? No
Is This A Product Problem Report? Yes
Device EXPIRATION Date04/11/2009
Device MODEL Number302-20
Device LOT Number200185
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer12/12/2013
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received01/13/2014
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured04/12/2006
Is The Device Single Use? Yes
Is this a Reprocessed and Reused Single-Use Device? No
Type of Device Usage Initial