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CYBERONICS, INC. BIPOL LEAD MODEL 300 Back to Search Results
Model Number 300-20
Event Date 01/26/2015
Event Type  Malfunction  
Event Description

Analysis of the generator explanted (b)(6) 2015 was completed, and is captured in manufacturer report # 1644487-2014-03067. The downloaded data from this generator showed that the date of high occurrence occurred sometime before (b)(6) 2015, as the impedance value changed from 13139 ohms to 22903 ohms on that day. Additional information was received that the patient underwent generator and lead replacement surgery (b)(6) 2015 due to prophylactic generator replacement and high impedance. The explanted products were received for analysis. Analysis of the explanted generator was completed. There were no performance or any other type of adverse conditions found with the pulse generator. The last recorded 25% change in impedance was from 12935 ohms to 3957 ohms on date of implant, (b)(6) 2015. Analysis of the lead has not been completed to date.

Manufacturer Narrative

Event description; corrected data: the previously submitted mdr inadvertently failed to include information that the patient received generator and lead replacement surgery (b)(6) 2015. Date of explant; corrected data: the previously submitted mdr inadvertently failed to indicate the date of explant.

Event Description

It was reported that during generator replacement surgery on (b)(6) 2015 due to low output current, the vns patient¿s replacement generator was tested with the existing lead and system diagnostic results revealed high impedance (impedance value >= 10,000 ohms). The replacement generator was tested with a test resistor and generator diagnostic results showed lead impedance within normal limits (impedance value ¿ 3900 ohms). The lead pin was reinserted into the generator header but the high impedance condition did not resolve. There was no indication that the lead was damaged during the procedure. Preoperative diagnostic tests were not performed. The lead was not replaced during the procedure. No known surgical interventions for the high impedance condition have occurred to date. The low output current event was reported in manufacturer report # 1644487-2014-03067.

Manufacturer Narrative

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

Event Description

Analysis of the explanted and returned lead was completed. Note that since a significant portion of the lead (including the electrode array) was not returned for analysis, an evaluation and resulting commentary cannot be made on that portion of the lead. Except for slight observed pitting on connector pin(s) and typical wear and explant related observations, there were no observed product related issues with the returned lead portions.

Manufacturer Narrative

Only a portion of the lead was returned for analysis which did not reveal any anomalies. Device failure is suspected in the lead portion not returned, but did not cause or contribute to a death or serious injury.

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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 Key4531831
Report Number1644487-2015-03916
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Health Professional,Company Representative
Type of Report Initial,Followup,Followup
Report Date 01/26/2015
1 Device Was Involved in the Event
0 PatientS WERE Involved in the Event:
Date FDA Received02/20/2015
Is This An Adverse Event Report? No
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date10/31/2001
Device MODEL Number300-20
Device LOT Number20423C
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer02/25/2015
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received03/24/2015
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured09/30/1999
Is The Device Single Use? Yes
Is this a Reprocessed and Reused Single-Use Device? No
Type of Device Usage Initial