MAUDE Adverse Event Report: PHILIPS MEDICAL SYSTEMS INTELLIVUE MX40 2.4GHZ; MONITOR, PHYSIOLOGICAL, PATIENT(WITH ARRHYTHMIA DETECTION OR ALARMS)

Model Number	MX40 - 2.4
Medical Device Problem Code	Incorrect Measurement (1383)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/15/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
E1: reporting institution phone# (b)(6).E1: reporter phone# (b)(6).Philips field service engineer (fse) evaluated the device using a pronk simslim8 simulator and was unable to replicate the user-reported issue of inaccurate heart rate values on the telemetry units.The device was tested with new leadsets and showed accurate values (simulated: 30 bpm, 60 bpm, 90 bpm; measured: 30 bpm, 60 bpm, 90 bpm).The device was returned to service.The user was advised to check lead placements and ensure proper skin preparation before placing electrodes.
Event or Problem Description
Philips received a complaint on the mx40 patient wearable monitor indicating that the telemetry mx40 was showing inaccurate heart rate values.The device was in clinical use at time of event, no adverse event was reported.

• Brand Name: INTELLIVUE MX40 2.4GHZ
• Common Device Name: MONITOR, PHYSIOLOGICAL, PATIENT(WITH ARRHYTHMIA DETECTION OR ALARMS)
• Manufacturer (Section D): PHILIPS MEDICAL SYSTEMS; 3000 minuteman rd; andover MA 01810
• Manufacturer (Section G): PHILIPS MEDICAL SYSTEMS; 3000 minuteman rd; andover MA 01810
• Manufacturer Contact: deborah currlin ; 3000 minuteman rd; andover, MA 01810 ; 6172455900
• MDR Report Key: 25125084
• Report Number: 1218950-2026-100303
• Device Sequence Number: 21515041
• Product Code: MHX
• UDI-Device Identifier: 00884838082243
• UDI-Public: (01)00884838082243
• Combination Product (Y/N): N
• Initial Reporter Country: SN
• PMA/510(K) Number: K113125
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,User Facility
• Initial Reporter Occupation: Nurse
• Type of Report: Initial
• Report Date (Section B): 05/08/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Model Number: MX40 - 2.4
• Device Catalogue Number: 865351
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 04/15/2026
• Initial Report FDA Received Date: 05/08/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 12/03/2025
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Sex: Unknown