Oregon Health & Science University

Welch Allyn, Inc.

Promedix, Inc.

Matthew Lee Hansen

Steven D Baker

Richard A Sunderland

David Clark Sheridan

Richard Howard Weitzel

Andrew B Kibler

Amen Mengistu

Adam Hoiness

Lauren Larocco

A guide structure () is configured for placement on a patient's skin and holding a medical probe () for adjustable positioning over the patient's skin during vascular line placement. A preferred guide structure includes a U-shaped base () having two arms () separated by an open space (). A carriage () for a medical probe holder () is movable along carriage guide surfaces () of the arms of the base and thereby forms a movable bridge spanning the open space. The medical probe holder carrying a medical probe is movable in a direction transverse to the arms of the base to set the medical probe to a desired distance into the open space. A carriage translation actuator () operatively associated with the carriage enables movement of the carriage and thereby adjusts the position of the medical probe over the surface of the patient's skin.

Ultrasound-based intravascular placement guide structure

An example system for estimating a hydration level of an individual can include: a mechanism configured to apply mechanical pressure to a digit of the individual; an light detector configured to sense the light from the digit; and a controller programmed to perform functions including: send a first signal to the mechanism to apply the mechanical pressure to the digit; send a second signal to the mechanism to release the mechanical pressure on the digit; determine a capillary refill time based upon a third signal from the light detector indicating an amount of time for capillaries of the individual to refill with blood; and estimate the hydration level of the individual based upon the capillary refill time and one or more additional parameters.

Estimating hydration using capillary refill time

A system for measuring capillary refill time includes a wearable device and a control unit. The wearable device includes a force sensor to obtain a force signal and an optical sensor to obtain an optical signal. The system ensures that an applied force is acceptable in both magnitude and duration, and that a duration over which the applied force is released or removed is acceptable. These factors can establish that a capillary refill time determined or calculated therein is accurate. The system can also determine the capillary refill time based on the force and optical signals obtained by the force and optical sensors, respectively.

Measuring capillary refill time

Growing community of inventors

Portland, OR, United States of America

Matthew Lee Hansen