The Masimo MightySat™ Rx Fingertip Pulse Oximeter delivers hospital-grade SpO₂ accuracy via Masimo SET® Measure-through Motion and Low Perfusion™ technology — trusted in the care of over 200 million patients. Measures SpO₂ (0–100%), Pulse Rate (25–240 bpm), Perfusion Index (Pi), Pleth Variability Index (PVi®), and Respiration Rate (RRp, 4–70/min). Rotating touchscreen display. 73g. IP23. ~1,800 battery spot-checks. Rx only.
Key Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Masimo Corporation |
| Technology | Masimo SET® Measure-through Motion and Low Perfusion™ |
| SpO₂ Range | 0–100% |
| Pulse Rate Range | 25–240 bpm |
| SpO₂ Accuracy (No Motion) | ±2% ARMS (70–100%) |
| Additional Parameters | Pi (0.02–20%), PVi®, RRp (4–70/min), Signal IQ®, Pleth waveform |
| Dimensions | 7.4 cm × 4.1 cm × 3.0 cm (2.9 × 1.6 × 1.2 in.) |
| Weight | 73 g (0.16 lbs) with batteries |
| Battery | Two 1.5V AAA batteries (~1,800 spot-checks) |
| Ingress Protection | IP23 |
| Operating Temperature | 5–40°C (41–104°F) |
| Display | Rotating touchscreen, 150° viewing angle |
| Connectivity | Bluetooth LE (with Masimo SafetyNet® app) |
| Compliance | UL 60601-1, IEC 60601-1, ISO 80601-2-61, CE Marked |
| Includes | Device, lanyard, drawstring pouch, AAA batteries |
| Prescription Status | Rx only |
Product Overview
Pulse oximetry is the standard vital sign monitor for oxygen saturation, and the Masimo MightySat™ Rx represents the highest available accuracy in a fingertip form factor. The defining technology is Masimo SET® — a Signal Extraction Technology using five parallel signal processing engines to measure through motion and low perfusion conditions that defeat conventional oximeters. While consumer-grade oximeters rely on ambient motion averaging and often fail during patient movement, cold hands, or poor circulation, SET® is clinically validated to deliver accurate readings under these exact conditions. This is the technology deployed in ICUs and operating rooms worldwide, now available in a 73-gram fingertip device.
Beyond the standard SpO₂ and pulse rate displayed on entry-level oximeters, the MightySat Rx measures three additional clinically meaningful parameters. Perfusion Index (Pi) quantifies the ratio of pulsatile to non-pulsatile blood flow — a proxy for peripheral perfusion that indicates hemodynamic status, shock, and medication effects on vasculature. Pleth Variability Index (PVi®) assesses respiratory variation in the photoplethysmographic signal, used clinically to predict fluid responsiveness in ventilated patients. Respiration Rate from the Pleth (RRp, 4–70/min) derives breathing rate non-invasively from the pulse waveform, providing a respiratory rate assessment without any separate sensor or manual count.
The rotating touchscreen with 150° viewing angle eliminates the frustration of fixed-orientation displays when the device must be read at unusual angles during patient transport or examination. Signal IQ® provides a confidence indicator for each reading — alerting the provider when signal quality is insufficient for clinical decision-making. Bluetooth LE enables connection to the Masimo SafetyNet® app for trend data, session storage, and remote sharing for telehealth workflows. The MightySat Rx is classified as Rx only in the U.S., appropriate for clinical and trained provider use.
See also: Diagnostic & Monitoring Equipment | IFAK Kits & First Aid
All products sourced from the actual brand manufacturer or authorized master distributors. CoTCCC recommendation status verified where applicable. Ships from MED-TAC International, Pembroke Pines, FL — clinician-founded, veteran-led, SDVOSB-certified.
Specifications coming soon. Contact us for detailed product information.
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