The aim of this study is to determine the accuracy of devices called pulse oximeters, which measure blood oxygen by shining light through fingers, ears or other skin, without requiring blood sampling. Study will be used with patients at rest.

This study is intended to evaluate performance of a new design pulse oximeter (test device) manufactured by Nihon Kohden Corporation sufficiently to support performance claims for an FDA 510K submission or ISO technical file. Specifically, SpO2 and pulse rate accuracy will be assessed for a Nihon Kohden OLV-4202 pulse oximeter with adult patients under a controlled setting of varying levels of inhaled oxygen concentration levels for patients at rest.

Inclusion Criteria:

• Both male and female subjects who can give written informed consent
• Healthy subjects capable of undergoing controlled hypoxemia to the levels outlined in the desaturation profile below
• Meeting the demographic requirements

Exclusion Criteria:

• Age below 18 or over 50
• Pregnant women
• Significant arrhythmia
• Blood pressure above 150 systolic or 90 diastolic
• Carboxyhemoglobin levels over 3%
• Subjects whom the investigator consider ineligible for the study

Healthy adult volunteers. At least 10 subjects will be recruited to complete the study. Of these 3 will be dark pigmented (FItzpatrick Scale Type 4, 5 or 6). If the number of samples is less than the required 200 or if less than 3 of dark pigment subjects successfully complete the study, subjects will be added to include 3 of dark pigmented subjects and at least 200 data points.

Data to be used by Sponsor only

3 months

The study was reviewed and approved by the University of California at San Francisco Committee on Human Research. The approval letter is on file at UCSF.