California Institute of Technology

Strokedx, Inc.

University of California

Shane S Shahrestani

Yu-Chong Tai

Lance G Hussey

John M Vernon

Cary R Chow

Tzu-Chieh Chou

Alexander M Ballatori

Ravi K Sawhney

Azita Emami

Olajire Idowu

Sunghoon Kim

Aubrey M Shapero

Abhinav Agarwal

Kuang-Ming Shang

Kurtis I Auguste

Robert Luke

Brian L Nguyen

Medical diagnostic devices and related methods of use are described in which one or multiple coils in a sensor, each coil connected with an RLC circuit and frequency counter, are held against a patient's head at predetermined cranial locations. Frequencies of the RLC circuit are measured and compared against those taken from known, control heads, to determine whether there is a medical problem and what type of problem. In some instances, too high of frequencies can reveal pooled blood in the head, a sign of hemorrhagic stroke, while too low of frequencies imply lack of blood supply, a sign of ischemic stroke. A head-mountable frame can assist a first responder in securing and guiding the coils and, along with fiducials, allow for automatic comparison of frequencies with the correct control data.

Inductive damping brain sensor

Medical diagnostic devices and related methods of use are described in which a sensor coil may be connected with a resistive, inductive, and capacitive (RCL) circuit including a power meter and a frequency counter, and the sensor may be positioned on a chest of a subject. The sensor apparatus may apply an alternating current through the sensor coil. The sensor apparatus may measure parallel resistance values in the sensor coil using the power meter for a time interval while the subject inhales and exhales. The sensor apparatus may record the parallel resistance values. The sensor apparatus may determine a first change in the parallel resistance values by measuring a difference between a crest and a trough of the parallel resistance values, wherein the crest of the parallel resistance value corresponds to the inhale and the trough of the parallel resistance value corresponds to the exhale of the subject's breath.

Eddy current damping respiratory waveform and volume sensor

A helmet-like medical diagnostic apparatus that is fixed or worn has motorized gimbals that automatically swivel to positions around a patient's head. An end effector extends radially from the gimbals toward the head to place a coil or other directional sensor snugly against the scalp. A coil sensor can be part of a sensitive circuit to measure eddy currents within the brain. Accelerometers, or other tilt-measuring gauges, are compared between those on the sensor and those on the apparatus's base to determine the precise 3D orientation of the sensor when resting against the head. The orientation can compensate coil measurements, find an exact spot again, or map opposing sides of the patient's cranium, even with a fidgeting unconscious patient. The head can be scanned in its entirety, or a spot scan may be prompted from other diagnostic data.

Coil positioning system for noninvasive brain sensor

Helmet for monitoring brain health

Methods of using an inductive damping brain sensor

A long-lasting, wireless, biocompatible pressure sensor device is integrated within a hydrocephalus shunt, either within the shunt's reservoir/anchor or as an inline or pigtailed connector. When integrated within a typical reservoir, the device can sit within the reservoir's hollow frustum area covered by the resilient silicone dome of the reservoir. When integrated as an inline connector, the device can sit at any point on the peritoneal catheter or ventricular catheter, including between the VP shut's valve and reservoir. The pressure sensor device includes electronics that can be powered wirelessly by a reader held to a patient's scalp, and so no battery may be required. The reader can transmit an ambient, atmospheric pressure reading from outside the skull to the implanted device so that its electronics can calculate a calibrated gauge pressure internally and then relay it to a patient's smart phone.

Implantable intracranial pressure sensor

Techniques are described for a non-invasive detection of a health condition of an organ. In an example, the electrical conductivity of the organ reflects the organ's health of. An inductive damping sensor can be used to detect the organ's electrical conductivity and, thus, its health. The inductive damping sensor can be placed in proximity of the organ such as the organ is within the magnetic field generated based on a coil of the inductive damping sensor. The conductivity of the organ impacts the inductance and the resistance of the coil. Hence, the inductance and/or resistance of the coil can be measured, where the measurements can be associated with the health of the organ.

Wearable inductive damping sensor

Growing community of inventors

Yorba Linda, CA, United States of America

Shane S Shahrestani