MAUDE Adverse Event Report: Nihon Kohden Corporation CNS-2101 Central Monitor; Central Monitoring System

Model Number	CNS-2101
Medical Device Problem Codes	Device Alarm System (1012); Protective Measures Problem (3015)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/13/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
The biomedical engineer (bme) reported that the central nurse station (cns) did not alarm that a patient's spo2 readings were low and the patient coded, but they did not expire.The end users stated they did not silence or turn off the spo2 alarm.
Additional Manufacturer Narrative
The biomedical engineer (bme) reported that the central nurse station (cns) did not alarm that a patient's spo2 readings were low and the patient coded, but they did not expire.The end users stated they did not silence or turn off the spo2 alarm.\ \ nihon kohden continues to investigate the reported event.Nihon kohden will submit a supplemental report in accordance with 21 cfr section 803.56 when additional information becomes available.\ \ \ additional device information: \ d10 concomitant medical device: the following device was used in conjunction with the cns:\ g7 monitor.\ model #: cu-172r.\ serial #:(b)(6).\ device manufacturer data: 5/25/2023.\ unique identifier (udi) #: (b)(4).\ returned to nihon kohden: not returned.

• Brand Name: CNS-2101 Central Monitor
• Common Device Name: Central Monitoring System
• Manufacturer (Section D): Nihon Kohden Corporation; attn: shama mooman; 1-31-4 nishiochia; shinjuku-ku, tokyo 161-8 560; JA 161-8560
• Manufacturer (Section G): Nihon Kohden Tomioka Corporation; attn: shama mooman; 1-1 tajino; tomioka city, gunma 370-2 314; JA 370-2314
• Manufacturer Contact: shama mooman ; seibu bldg 2, 4th floor 1-11-2; kusunokidai tokorozawa, saitama 359-8-580 ; JA 359-8580
• MDR Report Key: 50159578
• Report Number: 8030229-2026-06890
• Device Sequence Number: 16096273
• Product Code: MHX
• UDI-Device Identifier: 04931921017159
• UDI-Public: (01)04931921017159
• Combination Product (Y/N): N
• Initial Reporter State: AZ
• Initial Reporter Country: US
• PMA/510(K) Number: K223567
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: User Facility
• Initial Reporter Occupation: Biomedical Engineer
• Type of Report: Initial
• Report Date (Section B): 08/06/2026

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: Health Professional
• Device Model Number: CNS-2101
• Device Catalogue Number: CNS-2101
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 07/13/2026
• Initial Report FDA Received Date: 08/06/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/06/2024
• 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
• Concomitant Medical Products and Therapy/Usage Dates: G7 Monitor.
• Outcome Attributed to Adverse Event: Other; Life Threatening
• Patient Sex: Unknown