BEUDAMED
    FDA Adverse Event Injury Summary report: N

    NEUROSIGN CONCENTRIC PROBE

    MDR report key: 7657793 · Received July 3, 2018

    Report

    Report Number
    8021774-2018-00002
    Event Type
    Injury
    Date Received
    July 3, 2018
    Date of Event
    June 19, 2018
    Report Date
    June 25, 2018
    Manufacturer
    THE MAGSTIM COMPANY LIMITED
    Product Code
    GXZ
    UDI-DI
    05060229530660
    PMA / PMN Number
    K050325
    Adverse Event
    Yes
    Report Source
    Manufacturer report
    Reporter Location
    NZ
    Reporter Occupation
    OTHER

    Narratives

    Additional Manufacturer Narrative · 0

    PLEASE NOTE THAT THIS REPORT RELATES TO REPORT NUMBER 8021774-2018-00001. NEUROSIGN CONCENTRIC PROBE: MAGSTIM COULD NOT INVESTIGATE THE FUNCTIONALITY OF THE PROBE THAT WAS USED DURING THE SURGERY AS THIS WAS DISCARDED. NEVERTHELESS, THE HOSPITAL PERSONNEL WERE ABLE TO RECOVER THE PACKAGING AND THE BATCH NUMBER COULD BE CONFIRMED. A BATCH RECORD REVIEW WAS PERFORMED FOR THIS LOT NUMBER, WHICH CONFIRMED THAT THERE WERE NO ANOMALIES FOR THIS BATCH. IN ADDITION TO THIS, TWO RETAINED SAMPLES WERE TESTED OF THIS BATCH (ELECTRICAL PERFORMANCE), WHICH SHOWED THAT THESE PROBES WERE FUNCTIONING AS REQUIRED. MOREOVER, THE TIP WAS INSPECTED UNDER THE MICROSCOPE (50X MAGNIFICATION) AND BOTH TIPS DID NOT SHOW ANY DEVIATIONS OR ABNORMALITIES. ALL PROBES ARE CHECKED FOR FUNCTIONALITY BEFORE LEAVING THE MANUFACTURING SITE AND WILL NOT BE RELEASED IF NOT FUNCTIONING. THE NEUROSIGN 100 AND ASSOCIATED ACCESSORIES (PREAMPLIFIER AND STIMULATOR POD) WERE RECEIVED FOR INVESTIGATION AT MAGSTIM. INSPECTION OF THE N100 EXTERIOR SHOWED NO SIGNS OF DAMAGE. DURING TEST, A PRE-AMPLIFIER, A STIMULATOR POD AND A BIPOLAR PROBE WERE CONNECTED TO THE DEVICE. PATIENT LEADS WERE CONNECTED BETWEEN THE PRE-AMPLIFIER AND A DAMP (SALT WATER) SPONGE. THE SPONGE WAS STIMULATED WITH THE PROBE AT VARIOUS CURRENT VALUES. DURING STIMULATION, MOVEMENT WAS SEEN ON BOTH BAR GRAPHS AND AN AUDIBLE RESPONSE WAS HEARD FROM THE SPEAKER. THE CURRENT CONFIRM LED WAS ALSO SEEN TO LIGHT DURING STIMULATION. THIS INDICATES THAT THE PRODUCT WORKS AS INTENDED. THE SERVICE DEPARTMENT CONFIRMED THAT THE WHOLE SYSTEM AS RETURNED WAS TESTED, AS WELL AS THE INDIVIDUAL COMPONENTS ON THEIR OWN, WHICH SHOWED NO DEFECTS RELATED TO THE ISSUE REPORTED. AN ANALYSIS WAS MADE BY OUR NEUROSIGN BUSINESS MANAGER ON THE EVENT. HE ADVISED THAT THE USED PROBE (CONCENTRIC PROBE) WOULD NOT BE SUITABLE FOR MIDDLE EAR PROCEDURES, AS THE PROBE DOES NOT STIMULATE THROUGH BONE. DIFFERENT PROBES ARE AVAILABLE FOR THIS PART OF THE EAR. THIS INFORMATION IS AVAILABLE IN BROCHURE NEUROSIGN STIMULATING PROBES© 2017 - MARKETING DOCUMENT NUMBER: NMK1702-02 (AVAILABLE UPON REQUEST). OTHER POTENTIAL ROOT CAUSES COULD RELATE TO A FAULTY PROBE (UNLIKELY), THE INAPPROPRIATE CURRENT BEING USED OR SURGICAL ERROR. AS THE MOST LIKELY ROOT CAUSE APPEARS TO RELATE TO THE INCORRECT PROBE USED FOR THIS PARTICULAR SURGERY, MAGSTIM DECIDED TO GENERATE A TRAINING COURSE, ESPECIALLY TAILORED FOR NEW ZEALAND; THERE IS NO EVIDENCE TO SUGGEST A WIDER ISSUE AT THIS POINT. THIS TRAINING COURSE HAS BEEN SCHEDULED FOR SEPTEMBER 2018 AND WILL HAVE A FOCUS ON THE USE OF INTRAOPERATIVE NERVE MONITORING AND THE USE OF STIMULATING PROBES DURING THESE SURGERIES. THIS TRAINING WILL BE PROVIDED BY NEUROSIGN'S BUSINESS MANAGER, WHO HAS OVER 25 YEARS OF EXPERIENCE WITH INTRAOPERATIVE NERVE MONITORING.

    Additional Manufacturer Narrative · 1

    PLEASE NOTE THAT THIS REPORT RELATES TO REPORT NUMBER 8021774-2018-00001. MAGSTIM IS CURRENTLY AWAITING THE NEUROSIGN 100 DEVICE BACK FROM THE CUSTOMER FOR INVESTIGATION OF THE DEVICE. MAGSTIM COULD NOT INVESTIGATE THE FUNCTIONALITY OF THE PROBE THAT WAS USED DURING THE SURGERY AS THIS WAS DISCARDED. NEVERTHELESS, THE HOSPITAL PERSONNEL WERE ABLE TO RECOVER THE PACKAGING AND THE BATCH NUMBER COULD BE CONFIRMED. A BATCH RECORD REVIEW WAS PERFORMED FOR THIS LOT NUMBER, WHICH CONFIRMED THAT THERE WERE NO ANOMALIES FOR THIS BATCH. IN ADDITION TO THIS, TWO RETAINED SAMPLES WERE TESTED OF THIS BATCH (ELECTRICAL PERFORMANCE), WHICH SHOWED THAT THESE PROBES WERE FUNCTIONING AS REQUIRED. MOREOVER, THE TIP WAS INSPECTED UNDER THE MICROSCOPE (50X MAGNIFICATION) AND BOTH TIPS DID NOT SHOW ANY DEVIATIONS OR ABNORMALITIES. ALL PROBES ARE CHECKED FOR FUNCTIONALITY BEFORE LEAVING THE MANUFACTURING SITE AND WILL NOT BE RELEASED IF NOT FUNCTIONING. ALTHOUGH THE OUTCOME OF THE NEUROSIGN 100 INVESTIGATION IS NOT YET AVAILABLE, AN ANALYSIS WAS MADE BY OUR NEUROSIGN BUSINESS MANAGER ON THE EVENT. HE ADVISED THAT THE USED PROBE (CONCENTRIC PROBE) WOULD NOT BE SUITABLE FOR MIDDLE EAR PROCEDURES, AS THE PROBE DOES NOT STIMULATE THROUGH BONE. DIFFERENT PROBES ARE AVAILABLE FOR THIS PART OF THE EAR. THIS INFORMATION IS AVAILABLE IN BROCHURE NEUROSIGN STIMULATING PROBES© 2017 - MARKETING DOCUMENT NUMBER: (B)(4) (AVAILABLE UPON REQUEST). WITHOUT FULL INVESTIGATION RESULTS AVAILABLE AT THIS POINT, A FINAL ROOT CAUSE CANNOT YET BE DETERMINED. MAGSTIM WILL INFORM YOU AS SOON AS THE RESULTS OF THE DEVICE INVESTIGATION OF THE NEUROSIGN 100 ARE AVAILABLE.

    Description of Event or Problem · 1

    PATIENT (B)(6) (F, (B)(6)), UNDERWENT A STAPEDECTOMY SURGERY INDICATED FOR OTOSCLEROSIS ON THE (B)(6) 2018. THE PATIENT HAD AN ABERRANT FACIAL NERVE. DURING THE SURGERY A NEUROSIGN 100 AND A NEUROSIGN CONCENTRIC PROBE WERE USED FOR NERVE MONITORING. AS REPORTED BY THE CUSTOMER, THE DEVICE DID NOT IDENTIFY DIRECT STIMULATION OR MANIPULATION OF THE NERVE. THE PATIENT WAS REVIEWED IN THE RECOVERY UNIT (PACU) AFTER THE SURGERY, WHERE THE SURGEON NOTICED FACIAL ASYMMETRY, OR ALSO REPORTED AS PARTIAL FACIAL PALSY, WHICH COULD POTENTIALLY BE A PERMANENT INJURY.

    Devices

    Seq Brand Generic Product Code Manufacturer Model Lot UDI-DI
    501174 NEUROSIGN CONCENTRIC PROBE NEUROSIGN CONCENTRIC PROBE GXZ THE MAGSTIM COMPANY LIMITED 3600-00-TE 030910 05060229530660

    Patients

    Seq Age Sex Outcome Treatment
    1 35 YR Disability KTP LASER| NEUROSIGN 100| SKEETER DRILL| KTP LASER| NEUROSIGN 100| SKEETER DRILL