Neurotronics wins FDA clearance for AI sleep analysis that estimates sleep time from a pulse ox

Neurotronics, a Nihon Kohden company, said the U.S. FDA granted 510(k) clearance for its Sleep Analysis Module, software that estimates total sleep time from the photoplethysmography signal already collected by a pulse oximeter so home sleep apnea studies can use estimated sleep time instead of total recording time.

Home sleep tests often score apnea against clock time, which quietly softens the numbers when patients are awake. Neurotronics is betting a pulse-ox PPG model can hand clinicians estimated sleep time without another wire — and the FDA just cleared that bet. Watch whether estimated TST actually changes AHI calls in the wild, or just adds another number to the report.

Neurotronics, LLC, a Nihon Kohden company in Alachua, Florida, said the U.S. Food and Drug Administration granted 510(k) clearance for its Sleep Analysis Module. A 510(k) is the FDA route that lets a medical device onto the U.S. market when the maker shows it is as safe and effective as a device already sold. The module, called SAM, is software only. It carries an algorithm for total sleep time, TST, the estimate of how long a person was actually asleep. The company post is dated Nov. 6, 2026. The dateline is Alachua, Fla., Nov. 3, 2026. Those lines are Neurotronics'.

The algorithm reads a photoplethysmography signal, PPG, from a pulse oximeter the study is already using. PPG is the light-based pulse trace a sensor uses to estimate oxygen in the blood. From that trace, the software estimates total sleep time and is meant to help a clinician who is evaluating sleep disorders. A clinician is a doctor or another licensed person who can order and read the test. Neurotronics says this is the first FDA-cleared AI/ML sleep analysis algorithm inside the company. AI/ML means the estimate comes from a machine-learning model. Those lines are the company's.

The first integration is into Polysmith, Neurotronics' sleep diagnostic software, for studies recorded on NomadAir. NomadAir is a home sleep apnea test, an HSAT: a portable recorder a person wears at home instead of spending the night in a lab wired to a wall. SAM uses the PPG signal NomadAir already collects. The company says that means no extra sensor and no change to how the patient is set up. Those lines are Neurotronics'.

The point is the apnea-hypopnea index, AHI. AHI counts breathing events against time asleep. An apnea is a pause in breathing. A hypopnea is a breath that is too shallow. If the score uses total recording time, the clock keeps running while the person is awake, and the index can look milder than the night of sleep really was. Estimated sleep time is meant to stand in for that clock time. That motivation is the company's.

SAM is prescription only. It is for use by a clinician, or under a clinician's supervision, in patients 18 and older. Total sleep time from a PPG signal is an estimate. The software is not for studies that already have EEG, EOG, and EMG, the brain, eye, and muscle traces a lab uses for full sleep staging. Staging is the map of light sleep, deep sleep, and REM. The estimate is not the sole basis, or the primary basis, for diagnosing any sleep disorder. Commercial release is still waiting until integration and verification are finished. The announcement does not give a 510(k) number, a sensitivity number, a specificity number, or a price. Those limits are Neurotronics'.

Jake Johnson, president and chief executive, is quoted in the company release. The picture is the NomadAir recorder itself: a white portable device with status marks for airflow, chest movement, SpO2, and Poly. SpO2 is the oxygen estimate from the pulse sensor. The credit is Neurotronics / Nihon Kohden.

In plain terms, the FDA cleared software that estimates how long someone slept from a pulse-ox signal a home apnea test already records, so the apnea score is not softened by hours spent awake. It does not replace a lab sleep study. It is not a diagnosis by itself. It is for adults, by prescription, and it is not shipping until Neurotronics finishes wiring it into Polysmith.