• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

MassDevice

The Medical Device Business Journal — Medical Device News & Articles | MassDevice

  • Special Reports
  • Technologies
    • Artificial Intelligence (AI)
    • Cardiovascular
    • Orthopedics
    • Neurological
    • Diabetes
    • Surgical Robotics
  • Business & Finance
    • Wall Street Beat
    • Earnings Reports
    • Funding Roundup
    • Mergers & Acquisitions
    • Initial Public Offering (IPO)
    • Legal News
    • Personnel Moves
    • Medtech 100 Stock Index
  • Regulatory
    • Food & Drug Administration (FDA)
    • Recalls
    • 510(k)
    • Pre-Market Approval (PMA)
    • MDSAP
    • Clinical Trials
  • Resources
    • About MassDevice
    • Leadership in Medtech
    • Manufacturers & Suppliers Search
    • MedTech100 Index
    • Videos
    • Webinars
    • Whitepapers
    • Voices
    • In-Depth Coverage
    • Latest News
  • Attend DeviceTalks
    • Events
      • DeviceTalks Minnesota – May 4
      • DeviceTalks Boston – May 27–28
      • DeviceTalks West
      • DeviceTalks Tuesdays
    • DeviceTalks Podcast Network
      • DeviceTalks Weekly
      • AbbottTalks
      • Boston ScientificTalks
      • DeviceTalks AI
      • IntuitiveTalks
      • MedtechWOMEN Talks
      • MedtronicTalks
      • Neuro Innovation Talks
      • Ortho Innovation Talks
      • Structural Heart Talks
      • StrykerTalks
  • Advertise
  • Subscribe
Home » Apple to reintroduce blood oxygen measurements on watches

Apple to reintroduce blood oxygen measurements on watches

August 14, 2025 By Sean Whooley

Apple Watch Series 9 Masimo patent spat
The Apple Watch Series 9 [Image courtesy of Apple]

Apple announced today that it plans to introduce a redesigned Blood Oxygen feature for some users of its Apple Watch devices.

The company said that it intends to issue an iPhone and Apple Watch software update later today. The redesigned feature will come to some Series 9, Series 10 and Ultra 2 smartwatch users. Users without the Blood Oxygen feature can access the redesigned one by updating their paired devices.

Following the update, sensor data from the app on the watch will be measured and calculated on the paired iPhone. Users can view their results in the Respiratory section of their Health app.

According to Apple, a recent U.S. Customs ruling enabled the update. This comes nearly two years after the tech giant paused sales of certain watches amid a patent dispute with health monitoring company Masimo.

The patent spat goes back as far as January 2020, centering around light-based pulse oximetry technology used by the watches. Masimo develops a number of technologies that use pulse oximetry, including its FDA-cleared W1 smartwatch.

A turning point in the long-running dispute came in October 2023 when the U.S. International Trade Commission (ITC) ruled in Masimo’s favor. The ITC recommended a limited exclusion order for infringing Apple Watches with light-based pulse oximetry functionality. It found that Apple violated U.S. laws by incorporating this patented technology in its products. The battle continued last fall, with both companies claiming victories in their spat.

The analysts’ reaction to the latest Apple development and how it affects Masimo

BTIG analysts Marie Thibault, Sam Eiber and Alexandra Pang note that the U.S. Customs ruling affects only Apple Watches sold in the U.S. that didn’t include the original Blood Oxygen feature.

The analysts also say that, in early 2024, not long after the sales pause, the Exclusion Order Enforcement Branch of the U.S. Customs and Border Protection (CBP) allowed Apple to use a software workaround to sell its Apple Watch Series 9 and Ultra 2 with a redesign that did not include a pulse ox function.

Apple still has a pending federal appeal in its spat with Masimo, while Masimo’s infringement complaint goes to jury trial in November. Apple also has a complaint in Delaware district court set for trial at a later date.

“We await more details but do not think this U.S. Customs ruling and AAPL software update necessarily impact the legal arguments, and our recent investor discussions had seemed to point to no value being assigned for a potential litigation win,” the analysts said. “We continue to think any legal wins represent a call option for MASI, and we see a buying opportunity on today’s weakness.”

The analysts maintain a “Buy” rating for Masimo.

Filed Under: Blood Management, Business/Financial News, Cardiovascular, Diagnostics, Digital Health, Featured, Health Technology, Patient Monitoring, Software / IT Tagged With: Apple, Masimo

More recent news

  • Siemens Healthineers debuts Accela single-breath radiotherapy system
  • GE HealthCare hires chief AI officer from Medtronic
  • Former Teleflex CEO to lead Inspire competitor Nyxoah
  • Retired Stryker leader Tim Scannell dies at 62
  • HighLife raises more than $90M to advance its TMVR system

About Sean Whooley

Sean Whooley is a senior editor who mainly produces work for MassDevice, Medical Design & Outsourcing and Drug Delivery Business News. He received a bachelor's degree in multiplatform journalism from the University of Maryland, College Park. You can connect with him on LinkedIn or email him at [email protected].

Primary Sidebar

Cart

“md
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest med device regulatory, business and technology news.

DeviceTalks Weekly

See More >
MDO ad
MDO ad

Footer

MASSDEVICE MEDICAL NETWORK

DeviceTalks
Drug Delivery Business News
Medical Design & Outsourcing
Medical Tubing + Extrusion
Drug Discovery & Development
Pharmaceutical Processing World
MedTech 100 Index
R&D World
Medical Design Sourcing

DeviceTalks Webinars, Podcasts, & Discussions

Attend our Monthly Webinars
Listen to our Weekly Podcasts
Join our DeviceTalks Tuesdays Discussion

MASSDEVICE

Subscribe to MassDevice E-Newsletter
Advertise with us
About
Contact us

Copyright © 2026 · Arrowfly LLC and its licensors. All rights reserved.
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Arrowfly.

Privacy Policy