Kestrel Labs, Inc

Zynex Monitoring Solutions Inc.

Theodore Philip Delianides

Jonas Alexander Pologe

A photoplethysmographic device includes a photoplethysmographic monitor, two or more emitters coupled to and controlled by the monitor, the emitters including at least one laser and at least one of the at least one lasers is a tapped laser configured to emit light through a primary optical path from the emitter to a sensor, and a photodetector coupled to the monitor and positioned to receive light tapped from the tapped laser prior to the point where the light exits the sensor, the photodetector generating an electrical signal indicative of the intensity of the amplitude of the light tapped from the tapped laser. The monitor processing the electrical signal to determine the condition of the tapped laser, whereby the monitor determines if the tapped laser is damaged and/or if one or more operating conditions of the tapped laser need to be altered.

Tapped light in a laser-based photoplethysmographic device

A photoplethysmographic device including at least one laser light source and further including a protective sensor connector that has a protective flap (), a mechanism () for controlling movement of the protective flap, and a plurality of interconnections, at least one of which is an optical connection (). The movement of the protective flap designed to provide at least a substantially open position and a substantially closed position.

Photoplethysmographic device with mechanically-protected sensor connector

An embodiment of a laser to fiber coupling apparatus having a substratethat supports a laser mount, to which is affixed a submountand laser die, and an open slot mount, in which a light guideis affixed with an adhesive, such that the light from the laseris coupled into the light guide. The open slot arrangement permits the light guide to be moved in all six translational and rotational degrees of freedom to maximally couple the light from the laser to the light guide. Other embodiments are described and shown.

Laser to fiber optical coupling in photoplethysmography

An embodiment of a light launching portion of a photoplethysmographic device having a laser () light source and a light guide (). The coupled end of the light guide () includes an anti-reflection coating () to prevent or minimize the back reflection of light emitted by the laser (). This minimizes the extent to which back reflected light can re-enter the laser and adversely alter the optical output properties of the laser () and additionally minimizes the associated light loss thus helping to maximize the optical coupling efficiency. Other embodiments are described and shown.

Anti-reflective launch optics for laser to fiber coupling in a photoplethysmograpic device

A photoplethysmographic sensor designed for use on the presenting portion of a fetus during labor and delivery. The sensor has a non-deployed state in which the sensor presents a smaller footprint, or cross sectional area, for transvaginal insertion. Once the sensor is applied to the fetal tissue it is moved into the deployed state, which has a larger footprint or cross sectional area, than the sensor does in the non-deployed state. The deployed state optimizes the physical distance between the light emitter and the photodetector to maximize the photoplethysmographic measurement accuracy from the fetal tissue.

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Boulder, CO, United States of America

Theodore Philip Delianides