Hypoxia Clinical Trial
Official title:
Pulse Oximeter Responses to Multiple Levels of Stable Hypoxia
Validate Non-Motion SpO2 Accuracy from 70%-100% of various pulse oximeter/ sensor combinations and various OEM pulse oximeter modules and sensor combinations during induced hypoxia (desaturation).
The testing is conducted on 12 healthy, consenting, non-smoking subjects in accordance with
the IRB approved Protocol. The subjects shall be distributed across both genders and a range
of skin tones as equally as practical.
An arterial line will be placed in the radial artery of each subject's right arm, and
sensors will be attached to each subject. The subjects will be placed in a semi-supine
position and allowed to breathe through a mouthpiece while the nose is blocked with a
nose-clip.
Hypoxia will be induced by on each subject, as levels of oxyhemoglobin saturation (between
70% and 100%) are achieved by breathing mixtures of nitrogen, room air and carbon dioxide.
Inspired O2 concentration will be adjusted breath-by-breath using a computed saturation,
based on end-tidal PO2 and PCO2, as sampled by a mass spectrometer. Predicted levels of
oxyhemoglobin saturations will be attained and held stable. At a minimum of sixty seconds
into each plateau, a 0.5cc waste blood draw through the arterial line, followed by the first
1.0cc sample blood draw. After approximately thirty additional seconds, the second 1.0cc
sample blood draw will be taken. The samples will immediately be analyzed by a Radiometer
OSM-3 multi-wavelength co-oximeter and recorded. The SpO2 data from the oximeters will be
collected via a laptop computer. Concurrent with the end of each blood draw, a marker will
be generated on the laptop computers to identify the event.
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