METHOD AND DEVICE FOR MEASURING VENOUS BLOOD OXYGENATION

摘要

A device for non-invasively measuring at least one parameter of a cardiac blood vessel in a patient comprises at least one light source that directs light at a tissue site on the patient; at least one photodetector adapted to receive light emitted by the light source and generate an output based on the received light, the output of said photodetector being correlated with a parameter of the blood vessel; and at least one probe for facilitating delivery of light from the light source to the tissue site, and receipt of light by the photodetector. The device may include a height sensor to adapt it for use to determine central venous pressure, or the configuration of light source(s) and photodetector(s) may be adapted to permit the device to provide attenuation correction in the determination of venous blood oxygenation.

主权项

1. A device comprising:
at least one light source adapted to emit light in the 400 nm to 1000 nm wavelength range; at least one photodetector adapted to receive light emitted by the light source and translate said light into a recordable output wherein said light is reflected from or transmitted through tissue of the patient; at least one probe which facilitates delivery of light from the light source to an external tissue site on the patient in the proximity of the jugular vein and receipt of light reflected from or transmitted through said patient site by the photodetector; and a height sensor for mounting on the probe, said height sensor comprising a pressure sensor connected to a reference patch via a tube, wherein the tube is suitable to contain a liquid.