Calibration-free pulse oximetry

ChangeBridge: Patent Grants - Diagnosis & Surgery (A61B)

Published March 31st, 2026

Detected March 31st, 2026

Summary

The USPTO granted Patent US12588841B2 to Viavi Solutions Inc. on March 31, 2026, covering calibration-free pulse oximetry devices and methods. The patent (20 claims) describes devices and methods for calculating arterial oxygen saturation using photoplethysmography (PPG) data analysis without requiring traditional calibration. Inventors: Lan Sun, Chang Meng Hsiung, Babs Soller.

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What changed

The USPTO granted Patent US12588841B2 to Viavi Solutions Inc. on March 31, 2026, for calibration-free pulse oximetry technology. The patent covers devices that identify peak and trough timestamps from PPG data, generate absorption spectra, and calculate arterial oxygen saturation by fitting an arterial blood spectrum model to measured data. The patent contains 20 claims and names Lan Sun, Chang Meng Hsiung, and Babs Soller as inventors.

This is a routine patent grant creating no new regulatory obligations. Medical device manufacturers and healthcare technology companies developing pulse oximetry products should review the patent claims to assess potential infringement risks andFreedom-to-operate implications for competing or complementary products.

Source document (simplified)

← USPTO Patent Grants

Calibration-free pulse oximetry

Grant US12588841B2 Kind: B2 Mar 31, 2026

Assignee

VIAVI SOLUTIONS INC.

Inventors

Lan Sun, Chang Meng Hsiung, Babs Soller

Abstract

A device may identify a peak timestamp and a trough timestamp based on a first principal component of photoplethysmography (PPG) data associated with a plurality of wavelength channels. The device may generate a peak absorption spectrum based on the peak timestamp and the PPG data, and may generate a trough absorption spectrum based on the trough timestamp and the PPG data. The device may determine a measured arterial blood spectrum based on the peak absorption spectrum and the trough absorption spectrum. The device may fit the arterial blood spectrum model to the measured arterial blood spectrum to determine a set of values, each value in the set of values corresponding to a variable in a set of variables. The device may calculate an arterial oxygen saturation value based on one or more values of the set of values.