Blood oxygen concentration measurement device and method

ChangeBridge: Patent Grants - Diagnosis & Surgery (A61B)

Published March 31st, 2026

Detected March 31st, 2026

Summary

USPTO granted patent US12588840B2 to Quanta Computer Inc. on March 31, 2026, covering a blood oxygen concentration measurement device with light source, detection, signal processing, and control units. The patent includes 12 claims for calculating blood oxygen values, pulse rate, and signal strength index, with low perfusion measurement capabilities.

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What changed

USPTO issued patent grant US12588840B2 to Quanta Computer Inc. (inventors Peng-Zhe Tsai, Yung-Ming Chung) for a blood oxygen concentration measurement device. The device uses a light source unit to generate light signals that penetrate an object, with a detection unit receiving the penetrating signal to generate detection signals processed by a signal processing circuit. The control unit calculates blood oxygen values, pulse rate, and signal strength index, and performs low perfusion signal measurement processes based on signal strength index and predetermined indices. The patent contains 12 claims under CPC classifications A61B 5/14551, A61B 5/14552, A61B 5/0205, A61B 5/7225, A61B 5/725.\n\nManufacturers developing pulse oximetry or photoplethysmography devices should review this patent for potential infringement concerns. Competitors may need to design around the claims or evaluate licensing opportunities. Patent holders seeking similar functionality should ensure their designs do not overlap with the protected methods. The filing date was April 18, 2023, with European application number 18302204.

What to do next

Review patent claims to determine if existing or planned products infringe on protected blood oxygen measurement methods
Evaluate licensing options if implementing similar low perfusion measurement processes
Consider design alternatives to avoid infringement if developing competing pulse oximetry devices

Penalties

Patent infringement may result in injunctive relief and monetary damages including lost profits or reasonable royalty

Source document (simplified)

← USPTO Patent Grants

Blood oxygen concentration measurement device and method

Grant US12588840B2 Kind: B2 Mar 31, 2026

Assignee

QUANTA COMPUTER INC.

Inventors

Peng-Zhe Tsai, Yung-Ming Chung

Abstract

A blood oxygen concentration measurement device includes a light source unit, a light detection unit, a signal processing circuit, and a control unit. The light source generates a light signal. The light detection unit receives a penetrating signal generated by the light signal penetrating an object to generate a detection signal. The signal processing circuit receives the detection signal and processes the detection signal to generate a first processing signal. The control unit receives the first processing signal, calculates the blood oxygen value, the pulse rate and the signal strength index according to the first processing signal, and outputs the blood oxygen value, the pulse rate, and the signal strength index, or performs a low perfusion signal measurement process according to the signal strength index and the first predetermined index.