Covidien LP

Richard Nakai

Warren G Sanborn

David Hyde

Peter Doyle

Gardner Kimm

Gail Frances Upham

Gary Milne

Cynthia Miller

Gabriel Sanchez

Nirav Patel

Thomas Germain Wallner

Danis Carter

Nancy F Dong

Periagounder R Arul

Mark Ogilvie

Steve Vuong

This disclosure describes systems and methods for providing drive pressure ventilation of a patient. The disclosure describes a novel breath type that provides a spontaneous breath type that allows for the calculation of drive pressure that does not require invasive monitoring.

Systems and methods for drive pressure spontaneous ventilation

Systems and methods for novel ventilation that allows the ventilator to detect a patient intention to cycle exhalation are provided. Further, systems and methods for cycling exhalation based on a muscle pressure are provided.

Systems and methods for automatic cycling or cycling detection

This disclosure describes systems and methods for monitoring and evaluating data associated with ventilatory parameters to detect expiratory airflow limitation in a ventilated patient. For example, a ventilator may monitor flow and/or pressure during ventilation of the patient. Based on the flow and/or pressure measurements, or ventilatory data derived therefrom, the ventilator may calculate expiratory resistance. Moreover, the ventilator may trend expiratory resistance over time to produce an expiratory resistance waveform. In embodiments, the ventilator may calculate the slope of the expiratory resistance waveform during an initial part of exhalation. If the slope of the expiratory resistance waveform during the initial part of exhalation breaches a defined slope threshold, the ventilator may determine that the patient exhibits expiratory airflow limitation.

Detection of expiratory airflow limitation in ventilated patient

This disclosure describes systems and methods for providing drive pressure ventilation of a patient. The disclosure describes a novel breath type that provides a spontaneous breath type that allows for the calculation of drive pressure that does not require invasive monitoring, where drive pressure is the pressure applied to the lungs that causes them to inflate during mechanical ventilation.

This disclosure describes systems and methods for providing novel back-up ventilation. Further, this disclosure describes systems and methods for delivering ventilation when exhalation pressure and/or exhalation flow are unknown or unreliable by the ventilator.

Methods and systems for ventilation with unknown exhalation flow and exhalation pressure

This disclosure describes systems and methods for configuring a ventilator to estimate the carinal pressure to minimize the work of breathing due to a breathing tube. A patient's carina is a cartilaginous ridge located at the site of the tracheal bifurcation between the two primary bronchi. An estimated carinal pressure (a pressure estimated to exist at the patient carina) may be determined and used as feedback control for the carinal pressure. According to embodiments, the estimated carinal pressure may be compared to the carinal pressure command to determine an error. The carinal pressure command may be positive end expiratory pressure (PEEP) or some other suitable target pressure. The error between the estimated carinal pressure and the carinal pressure command may then be used as feedback control to achieve the carinal pressure command and thereby to minimize the work of breathing due to the breathing tube.

Using estimated carinal pressure for feedback control of carinal pressure during ventilation

This disclosure describes systems and methods for ventilating a patient with a system that includes an accumulator for storing a gas mixture. This disclosure describes systems and methods for ventilating a patient with a system that includes an accumulator located away from the flow path that reduces/eliminates pockets of an undesirable gas mixture from entering the gas flow path and reaching the patient after a gas mixture change by utilizing a purge valve.

Growing community of inventors

Long Beach, CA, United States of America

Richard Nakai