US 2026/0090744 A1Published application

Pulse oximeter

AssigneeSeiko Epson Corporation

InventorAkira IKEDA

Life of this patent

Estimating the term…

Loading patent…

Abstract

A pulse oximeter includes a saturation measurement unit that measures a blood oxygen saturation of a subject based on detection signals from a red light sensor and an infrared light sensor to obtain a measurement data group, an abnormal value detection unit that detects an abnormal value appearing in the measurement data group, a first data processing unit that generates a first data group by removing an abnormal value interval including the abnormal value and an adjacent time range having a predetermined length, a second data processing unit that generates a second data group by removing a low reliability interval where a reliability indicator calculated for the first data group is lower than a predetermined threshold, and a third data processing unit that performs data interpolation processing on the second data group to generate a third data group having a predetermined time length.

Claims10

Dependent claims

A pulse oximeter comprising:

a red light sensor configured to irradiate a subject with red light and detect the red light transmitted through or reflected from the subject;
an infrared light sensor configured to irradiate the subject with infrared light and detect the infrared light transmitted through or reflected from the subject;
and
a control device configured to process detection signals from the red light sensor and the infrared light sensor, wherein
the control device includes
a saturation measurement unit that measures a blood oxygen saturation of the subject based on the detection signals and records the blood oxygen saturation as a measurement data group,
an abnormal value detection unit that detects an abnormal value appearing in the measurement data group,
a first data processing unit that calculates an abnormal value interval including an adjacent time range having a predetermined length temporally adjacent to the abnormal value detected by the abnormal value detection unit, and generates a first data group by removing data in the abnormal value interval from the measurement data group,
a second data processing unit that calculates a reliability indicator through convolution for the first data group and generates a second data group by removing, from the first data group, data in a low reliability interval where the reliability indicator is lower than a predetermined threshold, and
a third data processing unit that performs, on the second data group, data interpolation processing for the removed abnormal value interval and the removed low reliability interval to generate a third data group having a predetermined time length.

7 more elements

A pulse oximeter comprising:

a red light sensor configured to irradiate a subject with red light and detect the red light transmitted through or reflected from the subject;
an infrared light sensor configured to irradiate the subject with infrared light and detect the infrared light transmitted through or reflected from the subject;
a control device configured to process detection signals from the red light sensor and the infrared light sensor;
and
a display unit configured to display information obtained by the control device, wherein
the control device
generates a measurement data group by measuring a blood oxygen saturation of the subject based on the detection signals, removes an abnormal value from the measurement data group to obtain an oxygen saturation data group, calculates a reliability indicator for the oxygen saturation data group, and displays the oxygen saturation data group and the reliability indicator on the display unit on the same time axis, and
performs, on a range where the reliability indicator exceeds a predetermined threshold in the oxygen saturation data group, data interpolation processing for a data missing portion removed as the abnormal value from the measurement data group, displays the threshold on the display unit, and further displays the portion subjected to the data interpolation processing in a display format different from that of the oxygen saturation data group.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/339,336Filed 25 Sep 2025
Priority: JP 2024-16888727 Sep 2024
Published: 2 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61B 5/14552
For measuring blood gases: details of sensors specially adapted therefor
A61B 5/7221
Signal processing specially adapted for physiological signals or for diagnostic purposes: determining signal validity, reliability or quality
A61B 5/742
Details of notification to user or communication with user or patient; User input means: using visual displays
A61B 5/746
Details of notification to user or communication with user or patient; User input means: alarms related to a physiological condition, e.g. details…

Family

No related US applications are recorded in the indexed filing history.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key