# K250757: Radius VSM and Accessories

- Pathway: 510(k) (Traditional)
- Applicant: Masimo Corporation
- Decided: May 29, 2025 after 78 days
- Product code: MHX (Monitor, Physiological, Patient(With Arrhythmia Detection Or Alarms))
- Device class: 2
- Regulation: 21 CFR 870.1025
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 24 generations back to K962603 (1997). 126 ancestors in all.
No later device cites it as a predicate yet.
2 of 127 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K223498: Radius VSM and Accessories, Masimo Corporation (2023) Summary page 5.

## Indications for use
Radius VSM: The Radius VSM and accessories are intended to be used as both a wearable multi-parameter patient monitor and an accessory to a multi-parameter patient monitor that is intended for multi-parameter physiological patient monitoring in hospital and healthcare facilities. The Radius VSM and accessories are indicated for the monitoring of hemodynamic (including ECG, arrhythmia detection, non-invasive blood pressure, Sp02, Pulse Rate, PVi, heart rate, and temperature), and respiratory (e.g., impedance, acoustic, and pleth-based respiration rate) physiological parameters along with the orientation and activity of adults. The Radius VSM and accessories are indicated for the non-invasive continuous monitoring of functional oxygen saturation of arterial hemoglobin (Sp02) and Pulse Rate (PR) of well or poorly perfused adults during both no motion and motion conditions. The Radius VSM and accessories are indicated for continuous monitoring of skin temperature of adults. The Radius VSM and accessories are indicated for monitoring of the orientation and activity of patients including those susceptible to pressure ulcers. The Radius VSM and accessories are indicated for the continuous non-invasive monitoring of PVi as a measure of relative variability of the photoplethysmograph (pleth) of adults during no motion conditions. PVi may be used as a noninvasive dynamic indicator of fluid responsiveness in select populations of mechanically ventilated adult patients. Accuracy of PVi in predicting fluid responsiveness is variable and influenced by numerous patient, procedure and device related factors. PVi measures the variation in the plethysmography amplitude but does not provide measurements of stroke volume or cardiac output. Fluid management decisions should be based on a complete assessment of the patient's condition and should not be based solely on PVi. Devices with Masimo technology are only indicated for use with Masimo accessories. Radius VSM Accessories: Radius VSM ECG Electrodes are disposable, single-patient use ECG electrodes intended to acquire ECG signals from the surface of the body. They are indicated for use on adults for up to 3 days of skin surface contact. Radius VSM Blood Pressure Cuffs are accessories intended to be used with a noninvasive blood pressure measurement system to measure blood pressure. They are indicated for use on adults during no motion conditions.

Source page: https://510kreport.com/device/K250757
Methodology: https://510kreport.com/methodology