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U.S. Department of Health and Human Services

MAUDE Adverse Event Report: CYBERONICS, INC. PULSE GEN MODEL 102 GENERATOR

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CYBERONICS, INC. PULSE GEN MODEL 102 GENERATOR Back to Search Results
Model Number 102
Event Date 03/01/2012
Event Type  Malfunction  
Event Description

On (b)(6) 2012, the surgeon and patient reported that following information: the pain in the neck, lead protrusion, and pain in the chest began shortly after the vns surgery. The patient bent down to get something and injured her back. The physician stated that the back pain is not related to the vns, and it was probably a coincidence that it occurred close to the date of surgery. The throat tightening began after the patient's settings were adjusted by a physician in another state. The neurologist adjusted the pulsewidth, and the throat tightening ceased. The tingling in the arms and hand occurs when the patient lies on her left side. The patient reported experiencing feeling this for some time but did not have an exact date. The patient reported lateral migration of the device and stated that it was sitting on her right pectoral muscle. The patient experiences pain from this when moving her left arm. The patient did not know on what this date event began. The pain in the neck, lead protrusion, and pain in the chest were reported to have no relationship to vns. The throat tightening was experienced with stimulation; however, reducing the puslewidth resolved this issue. The tingling was reported due to the lateral device migration interventions for the generator migration included a referral from the surgeon to revise the generator to a newer model and move the generator. No interventions have been planned for the tingling. Aside from the throat tightening due to increased pulsewidth, no causal or contributory programming changes, medication changes, patient manipulation, patient trauma, or physiological changes (i. E. Weight loss) preceded the pain in the neck, lead protrusion, pain in the chest, tingling in the arms and hands, and generator migration. The patient has no history of pain in the neck or chest, throat tightening, or tingling pre-vns. It is unclear if a non-absorbable suture was used to secure the generator fascia during implant as the surgery was performed at another facility. Normal mode and system diagnostics indicated "ok" lead impedance and that the battery was not at end of service. The reference the patient made to the generator being "messed up" was clarified by the surgeon. The surgeon reported that it is likely that the pain she is experiencing is due to device size and migration and is recommending the device be replaced with a 103. The patient's output current was reported to be 0. 75 ma. The surgeon also recommended a revision from a model 102 generator to a model 103 generator and movement of the generator placement. The patient reported that the device was helping and that she did well at settings from her previous physician; however, her current physician has reduced the settings, and, as a result, she is experiencing more seizures. Additional information was received on (b)(6) 2012, that the patient's increase in seizures was below the pre-vns baseline. On (b)(6) 2012, the implanting surgeon confirmed that a non-absorbable suture was used during the initial implant of the device. Although surgery is likely, it has not occurred to date.

 
Event Description

On (b)(6) 2012, this vns patient reported that she was hospitalized last month due to incontrollable seizures. The patient reported that problems with device pain began around (b)(6) 2012, and the problems have continued. The patient reported that she had a stroke last month and is unable to move her left arm and left leg. At the time of the report, the patient was receiving physical therapy in her home. An mri was likely to rule out stroke. The patient underwent generator and lead explant on (b)(6) 2012. The electrodes were not removed as they were scarred in. The explanted lead and generator were received on (b)(6) 2012 and are currently undergoing product analysis.

 
Event Description

The physician did not believe the patient's stroke was related to vns.

 
Manufacturer Narrative

(b)(4).

 
Manufacturer Narrative

Review of programming/device diagnostic history performed.

 
Event Description

On (b)(6) 2012, this vns patient reported that a surgeon would be removing the generator and "snipping" the leads. The patient was unsure if she would be undergoing explant or revision. The patient last met with her neurologist (b)(6) months ago ((b)(6) 2012), at which time the settings were increased. The patient reported that she was having some pain in the neck (like it was poking through), throat tightening, continuous pain in the chest, the generator moving around in her chest when she lays on her side, and tingling in the arm and hands, which causes her to not lift her arm. The patient stated that the issues began one and a half months ago ((b)(6) 2012). The patient stated that the only traumatic incident that occurred just prior to the events was getting her hair washed in the sink at the hair dresser. The patient stated that the positioning may have pulled on her device or positioned her in an awkward way. The patient met with her neurologist's pa (physician's assistant) and was prescribed pain medication to which the patient had an allergic response. The pa referred the patient to the surgeon because her "device was messed up" and was causing these issues. The patient stated that no diagnostics were performed at this time. Attempts for additional information are underway.

 
Event Description

Lead product analysis was approved on (b)(6) 2012. The lead assembly was returned for analysis. Note that since the electrode array portion was not returned for analysis, an evaluation and resulting commentary cannot be made on that portion of the lead. Other than typical wear and explant related observations, no anomalies were identified in the returned lead portion. A section of the lead assembly was returned for analysis in two pieces. The lead's electrodes were not returned for evaluation. Two tie-downs were returned with the lead. Inspection of the first portion of the returned lead showed that setscrew marks were seen on the connector pin, providing evidence that proper contact between the setscrew and the lead pin existed at least once. An abrasion was identified on the connector boot. The lead assembly appears to have been cut at near the end of the connector boot. The lead coils are cut/torn at this location. Inspection of the second portion of the returned lead showed that abrasions most likely caused by the presence of a tie-down were identified. Abrasions were identified on the outer silicone tubing at multiple locations. The lead assembly has remnants of what appears to be body fluids inside the inner silicone tubing. No obvious point of entrance was noted other than the ends of the returned lead portions. Generator pa was approved on (b)(6) 2012. The generator did perform according to functional specifications. In addition, the septum was not cored, thus eliminating the possibility of a potential unintended electrical current path through body fluids, (addressing the allegations of "pain"). Testing demonstrated proper device functionality (in both programmed and "on-demand" operational modes) including outputs that meet specifications. The pulse generator diagnostics were as expected for the programmed parameters. The generator performed according to functional specifications. No performance or any other type of adverse conditions found with the pulse generator.

 
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Brand NamePULSE GEN MODEL 102
Type of DeviceGENERATOR
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
nydia herzog
100 cyberonics blvd
suite 600
houston , TX 77058
2812287200
MDR Report Key2597650
Report Number1644487-2012-01408
Device Sequence Number1
Product CodeLYJ
Report Source Manufacturer
Source Type Consumer,Health Professional,Company Representative
Reporter Occupation
Type of Report Initial,Followup,Followup,Followup,Followup
Report Date 05/07/2012
1 Device Was Involved in the Event
1 Patient Was Involved in the Event
Date FDA Received06/04/2012
Is This An Adverse Event Report? Yes
Is This A Product Problem Report? Yes
Device Operator LAY USER/PATIENT
Device EXPIRATION Date06/30/2011
Device MODEL Number102
Device LOT Number2534
Was Device Available For Evaluation? Device Returned To Manufacturer
Date Returned to Manufacturer10/12/2012
Is The Reporter A Health Professional? No
Event Location Other
Date Manufacturer Received03/25/2013
Was Device Evaluated By Manufacturer? Yes
Date Device Manufactured01/06/2010
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: 06/04/2012 Patient Sequence Number: 1
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