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U.S. Department of Health and Human Services

MAUDE Adverse Event Report: CYBERONICS, INC. BIPOL LEAD MODEL 300

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CYBERONICS, INC. BIPOL LEAD MODEL 300 Back to Search Results
Model Number 300-20
Event Date 01/06/2015
Event Type  Malfunction  
Event Description

It was reported that the patient was admitted to the hospital with a sore neck and vocal chord paralysis. Device diagnostics resulted in high impedance. The device was programmed off and the patient was referred for surgery for generator and lead replacement. No additional relevant information has been received to date. No known surgical interventions have been performed to date.

 
Event Description

Additional information was received on the patient's symptoms. The patient was experiencing dysphagia and hoarseness prior to being admitted to the hospital. The patient was then found to have left true vocal cord (tvc) paralysis. Due to a suspected abscess, the patient went into or for an incision and drainage procedure (found to be fluid collection not abscess). A lead fracture was then observed during the procedure with abraded insulation. The patient's neurosurgeon believes the lead fracture caused stimulation to surrounding neck tissue which led to necrosis and the fluid buildup. The neck fluid buildup is slowly resolving following vns removal. The patient is continuing to have hoarseness although dysphagia has improved. However, in his experience, the neurosurgeon believes tvc paralysis will likely be permanent due to nerve damage.

 
Manufacturer Narrative

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

 
Manufacturer Narrative

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

 
Manufacturer Narrative

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

 
Event Description

It was reported that the patient underwent generator and lead explant due to the high impedance. It was reported that a new vns system was not implanted at this time. The explanted generator and lead were received for analysis. Analysis of the generator was completed on 02/16/2015. The generator performed according to functional specifications. During the product analysis there were no anomalies found with the pulse generator. Analysis of the lead was completed on 02/18/2015. Note that the electrodes, plus one inner tube and quadfilar coil were not returned for analysis; therefore a complete evaluation could not be performed on the entire lead product. During the visual analysis of the returned 314mm portion discoloration was observed on a portion of quadfilar coil 1 and the end appeared to be broken approximately 281mm from the end of the cut outer / inner silicone tubes. What appeared to be a greenish substance was observed inside inner silicone tubing 1 and quadfilar coil 1 appeared to be dissolved in this area. Scanning electron microscopy was performed on quadfilar coil 1 coil break found at 281mm and identified the area as being thin which prevented identification of the coil fracture type and evidence of electro-etching on the surface. It is believed that stimulation was present for a certain period of time as evidenced by the presence of metal pitting. 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 puncture marks found on the outer silicone tubing and the cut ends that were made during the explanted process, most likely provided the leakage path for the dried remnants of what appeared to have once been body fluids inside the outer silicone tubing. For the observed inner tubing fluid remnants, there was no obvious path for fluid ingress other than the cut ends that were made during the explanted process. What appeared to be white deposits were observed in various locations. Eds (energy dispersion spectroscopy - provides chemical or element identity/composition analysis) was performed and identified the deposit as containing silicon, phosphorus, sodium, magnesium, chlorine, zirconium, aluminum, sulphur and calcium. 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. The setscrew marks found on the lead connector pins 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 other discontinuities were identified.

 
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Brand NameBIPOL LEAD MODEL 300
Type of DeviceLEAD
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 Key4453271
Report Number1644487-2015-03700
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup,Followup
Report Date 01/06/2015
1 Device Was Involved in the Event
1 Patient Was Involved in the Event
Date FDA Received01/26/2015
Is This An Adverse Event Report? Yes
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date05/31/2001
Device MODEL Number300-20
Device LOT Number22279C
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer01/29/2015
Is The Reporter A Health Professional? Yes
Event Location Other
Date Manufacturer Received03/25/2015
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured05/04/1999
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: 01/26/2015 Patient Sequence Number: 1
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