Nellcor Puritan Bennett Incorporated

Covidien LP

Mallinckrodt, Inc.

Tyco Healthcare Group LP

Chart Inc.

Charles E Porges

Paul David Mannheimer

Michael E Fein

David B Swedlow

Adnan I Merchant

Marcia Fein, Legal Representative

Thomas J Yorkey

Michael J Bernstein

Thomas A Berson

Bryan Olson

David Schloemer

Joseph Douglas Vandine

Clark Baker

Clark Raymond Baker, Jr

Edward Karst

David Hyde

Russell L DeLonzor

Edward M Richards

Stephen L Daleo

Michael W Nootbaar

Alfred Chung

Charles Stuart

Daniel M Nemits

James E Luecke

Gary L Crumback

Michael Patrick O'Neil

Joel C Colburn

Philip Kenneth Snyder

Michael J Fullmer

Kelly S Gottlib

Bonny Setzer

Michael C Fein

Michael E Di Fein

David Swedlow

The present disclosure relates, in some embodiments, to devices, systems, and/or methods for collecting, processing, and/or displaying stroke volume and/or cardiac output data. For example, a device for assessing changes in cardiac output and/or stroke volume of a subject receiving airway support may comprise a processor; an airway sensor in communication with the processor, wherein the airway sensor is configured and arranged to sense pressure in the subject's airway, lungs, and/or intrapleural space over time; a blood volume sensor in communication with the processor, wherein the blood volume sensor is configured and arranged to sense pulsatile volume of blood in a tissue of the subject over time; and a display configured and arranged to display a representative of an airway pressure, a pulsatile blood volume, a photoplethysmogram, a photoplethysmogram ratio, the determined cardiac output and/or stroke volume, or combinations thereof. A method of assessing changes in cardiac output or stroke volume of a subject receiving airway support from a breathing assistance system may comprise sensing pressure in the subject's airway as a function of time, sensing pulsatile volume of blood in a tissue of the subject as a function of time, producing a photoplethysmogram from the sensed pulsatile volume, determining the ratio of the amplitude of the photoplethysmogram during inhalation to the amplitude of the photoplethysmogram during exhalation, and determining the change in cardiac output or stroke volume of the subject using the determined ratio.

Method for determining hemodynamic effects

A system and method for conserving oxygen in a breathing assistance device are disclosed. A method may include delivering breathable gas with a first average oxygen concentration during a first portion of an inhalation phase for a patient. The method may also include delivering breathable gas with a second average oxygen concentration during a second portion of an inhalation phase for a patient.

Systems and methods for conserving oxygen in a breathing assistance device

There is disclosed an endotracheal tube which has a minimal cross-sectional profile for easy viewing of anatomical features during intubation. After the tube is placed into the trachea, the tube is adapted to increase the diameter. In this manner the tube diameter may be expanded to allow for decreased Work of Breathing (WOB) for patient, while not having so large a diameter as to cause tracheal discomfort.

Self-sizing adjustable endotracheal tube

A sensor has codes useful for a monitor which can be authenticated as accurate. The sensor produces a signal corresponding to a measured physiological characteristic and provides codes which can be assured of being accurate and authentic when used by a monitor. A memory associated with the sensor stores both data relating to the sensor and a digital signature. The digital signature authenticates the quality of the code by ensuring it was generated by an entity having predetermined quality controls, and ensure the code is accurate.

Sensor with signature of data relating to sensor

Embodiments of the present invention include systems and methods that relate to a sensor with memory. Specifically, one embodiment includes a method of sensor operation, comprising emitting light from a light emitting element of the sensor, detecting the light with a light detecting element of the sensor, storing sensor model identification data within a memory of the sensor, and providing access to the memory to facilitate reading the sensor model identification data with an oximeter monitor.

Oximeter sensor with digital memory encoding sensor data

Embodiments of the present invention include systems and methods that relate to a sensor with memory. Specifically, one embodiment includes a method of sensor operation, comprising emitting light from a light emitting element of the sensor, detecting the light with a light detecting element of the sensor, and providing a manufacturer identification of the sensor stored within a memory of the sensor to an oximeter monitor.

An apparatus for providing humidification in a breathing assistance system may include a first container at least partially defining a first volume for housing an absorbent material, a second container at least partially defining a second volume for holding a liquid, and one or more fluid passageways for communicating the liquid from the second volume to the absorbent material in the first volume.

Spill resistant humidifier for use in a breathing assistance system

A breathing assistance system with functionality for detecting the existence of a fault condition may include a pressure detector, a flow detector and a fault detection system. The pressure detector may take pressure measurements, each measurement including a measurement of a gas flow rate in the breathing assistance system. The flow detector may take flow rate measurements, each flow rate measurement including a measurement of has flow rate in the breathing assistance system. The fault detection system may process the pressure measurements and/or flow rate measurements to determine the existence of a fault condition associated with the breathing assistance system.

Method and system of detecting faults in a breathing assistance device

A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored. The multiple sets apply to different ranges of saturation values to provide a better fit to occur by breaking the R to SpO2 relationship up into different pieces, each described by a different function. The different functions can also be according to different formulas for determining oxygen saturation.

Pulse oximeter sensor with piece-wise function

Sensors and monitors for a physiological monitoring system having capability to indicate an accuracy of an estimated physiological condition. The sensor senses at least one physiological characteristic of a patient and is connectable to a monitor that estimates the physiological condition from signals detected by the sensor. The sensor includes a detector for detecting the signals from the patient which are indicative of the physiological characteristic. The sensor is associated with a memory configured to store data that defines at least one sensor signal specification boundary for the detected signals. The boundary is indicative of a quality of the signals and an accuracy of the physiological characteristic estimated from the signals by the monitor. The sensor further includes means for providing access to the memory to allow transmission of the data that defines the at least one sensor boundary to the monitor.

Method and circuit for indicating quality and accuracy of physiological measurements

Embodiments of the present invention relate to a sensor for facilitating detection of a physiological characteristic of a patient. Specifically, one embodiment includes a detector configured to obtain signals from the patient, the signals being indicative of the physiological characteristic and to send the signals to a monitor, and a sensor memory coupled with the sensor and separate from the monitor, the sensor memory storing patient physiological data derived by the monitor from the signals, the patient physiological data being indicative of the physiological characteristic.

Method and circuit for storing and providing historical physiological data

Growing community of inventors

Orinda, CA, United States of America

Charles E Porges