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CYBERONICS, INC. LEAD MODEL 302 Back to Search Results
Model Number 302-20
Event Date 06/01/2014
Event Type  Malfunction  
Event Description

It was reported that the patient underwent lead replacement on (b)(6) 2015. Device diagnostics on the surgery date returned impedance within normal ranges (1440 ohms). Further information was received indicating that the outcome for the patient was satisfactory and that new device diagnostics returned impedance within normal ranges (2959 ohms). The explanted lead has not been returned to the manufacturer to date.

Event Description

The returned lead was analyzed. Visual analysis of the returned portion found that the positive connector ring quadfilar coil appeared to be broken approximately 1. 5mm from the electrode bifurcation. Scanning electron microscopy identified that the area was mechanically damaged, which prevented identification of the coil fracture type. Pitting was observed on the coil surface, which evidences that stimulation was present for a certain period of time. Low magnification scanning electron microscopy 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 and what appeared to be white deposits were observed in various locations. With the exception of the observed discontinuity the condition of the returned lead portions is consistent with conditions that typically exist following an explant procedure. No other obvious anomalies were noted. Continuity checks of the returned lead portion were performed, during the visual analysis, and no other discontinuities were identified.

Event Description

It was reported that the lead became twisted and coiled during explant. The lead was received for analysis. Analysis is underway, but has not been completed to date.

Manufacturer Narrative

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

Event Description

It was reported that device diagnostics resulted in high impedance (>10,000 ohms). X-rays were taken and sent to manufacturer for review. It was reported that the patient's increase in seizures was being managed by optimisation in medication. Radiology report indicated that no break in the lead was seen. Review of x-rays by manufacturer did not identify any suspected lead discontinuity. The lead pin appeared to be fully inserted into the generator header. The cause of the high impedance was unable to be determined based on the x-ray images received. It was reported that the device was programmed off after observing the high impedance. There was no patient manipulation or trauma that is believed to have caused or contributed to the high impedance. No known surgical intervention has occurred 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.

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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 Key4193982
Report Number1644487-2014-02785
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Foreign,Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup,Followup,Followup
Report Date 09/24/2014
1 Device Was Involved in the Event
0 PatientS WERE Involved in the Event:
Date FDA Received10/22/2014
Is This An Adverse Event Report? No
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date08/31/2008
Device MODEL Number302-20
Device LOT Number11265
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer05/15/2015
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received06/22/2015
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured08/26/2005
Is The Device Single Use? Yes
Is this a Reprocessed and Reused Single-Use Device? No
Type of Device Usage Initial