MAUDE Adverse Event Report: BOSTON SCIENTIFIC CORPORATION LUX-Dx II?; Insertable Cardiac Monitor

Model Number	M302
Medical Device Problem Code	Premature Discharge of Battery (1057)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/05/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that this insertable cardiac monitor (icm) reached the recommended replacement time (rrt).It was indicated that the icm was displaying signs of premature battery depletion as the voltage started to drop unexpectedly.It was advised to return the device for detailed analysis.The icm remains in service and no adverse patient effects were reported.
Additional Manufacturer Narrative
This product has not been returned to boston scientific, and as a result, laboratory analysis could not be conducted.Product record reviews did not identify a product quality issue or new patient harm.Analysis of available information suggests a device problem.A review of the device history record (dhr) was performed.The review of the dhr identified that there were no process related non-conformances, scrap, or rework performed during the production that could explain the event.The reviews ensure each device meets specification prior to release for use.A risk review was completed and confirmed that the event of premature discharge of battery was defined in the risk documentation.This event type has been accounted for during product risk analysis to support acceptable risk benefit for the product.Review of labeling determined that the complaint situation was listed in the manual.There was no indication in the complaint that the product was not used in accordance to labeling.The manual was unlikely to be the cause of the reported complaint; translation, wording, or graphics does not require further review.Based on a thorough review of the reported complaint, boston scientific has assigned an investigation conclusion code of "cause linked to device but unable to trace more specifically.
Event or Problem Description
It was reported that this insertable cardiac monitor (icm) reached the recommended replacement time (rrt).It was indicated that the icm was displaying signs of premature battery depletion as the voltage started to drop unexpectedly.It was advised to return the device for detailed analysis.The icm remains in service and no adverse patient effects were reported.
Event or Problem Description
It was reported that this insertable cardiac monitor (icm) reached the recommended replacement time (rrt).It was indicated that the icm was displaying signs of premature battery depletion as the voltage started to drop unexpectedly.It was advised to return the device for detailed analysis.The icm remains in service and no adverse patient effects were reported.The icm has been explanted.A new icm has been implanted.No additional adverse patient effects were reported.
Additional Manufacturer Narrative
This product has not been returned to boston scientific, and as a result, laboratory analysis could not be conducted.Product record reviews did not identify a product quality issue or new patient harm.Analysis of available information suggests a device problem.A review of the device history record (dhr) was performed.The review of the dhr identified that there were no process related non-conformances, scrap, or rework performed during the production that could explain the event.The reviews ensure each device meets specification prior to release for use.A risk review was completed and confirmed that the event of premature discharge of battery was defined in the risk documentation.This event type has been accounted for during product risk analysis to support acceptable risk benefit for the product.Review of labeling determined that the complaint situation was listed in the manual.There was no indication in the complaint that the product was not used in accordance to labeling.The manual was unlikely to be the cause of the reported complaint; translation, wording, or graphics does not require further review.Based on a thorough review of the reported complaint, boston scientific has assigned an investigation conclusion code of "cause linked to device but unable to trace more specifically".

• Brand Name: LUX-Dx II?
• Common Device Name: Insertable Cardiac Monitor
• Manufacturer (Section D): BOSTON SCIENTIFIC CORPORATION; 4100 hamline avenue north; saint paul MN 55112
• Manufacturer (Section G): Boston Scientific Corporation; cashel road; clonmel ; EI
• Manufacturer Contact: timothy degroot ; 4100 hamline avenue north; saint paul, MN 55112 ; +1(651)582-6168
• MDR Report Key: 25017807
• Report Number: 2124215-2026-22823
• Device Sequence Number: 9497397
• Product Code: MXD
• UDI-Device Identifier: 00802526620713
• UDI-Public: (01)00802526620713(17)260206
• Combination Product (Y/N): N
• Initial Reporter State: MA
• Initial Reporter Country: US
• PMA/510(K) Number: K231328
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Device Explanted Year: 2026
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 08/24/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 02/06/2026
• Device Model Number: M302
• Device Catalogue Number: M302
• Device Lot Number: 108222
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 04/08/2026
• Supplement Date Received by Manufacturer: 05/06/2026; Not provided
• Initial Report FDA Received Date: 04/28/2026
• Supplement Report FDA Received Date: 05/07/2026; 08/24/2026
• Date Device Manufactured: 08/23/2024
• Is the Device Labeled for Single Use? (Y/N): Yes
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Hospitalization; Required Intervention
• Patient Age: 76 YR
• Patient Sex: Unknown