RESPIRATION-RATE DEPENDENT RESPIRATORY ASSISTANCE
First Claim
Patent Images
1. A method for controlling respiratory assistance of a subject, the subject having an airway, the method comprising:
- generating a pressurized flow of breathable gas for delivery to the airway of a subject at an inspiratory pressure level during a breath by the subject, wherein the breath has inspiratory volume during an inspiratory phase and expiratory volume during an expiratory phase;
determining a breathing rate of the subject;
adjusting a first volume threshold based on the determined breathing rate;
monitoring the inspiratory volume of the breath by the subject;
comparing the inspiratory volume to the first volume threshold to determine when the inspiratory volume of the breath breaches the first volume threshold; and
responsive to the inspiratory volume of the breath breaching the first volume threshold, temporarily decreasing the pressure of the pressurized flow of breathable gas from the inspiratory pressure level for expiration by the subject.
1 Assignment
0 Petitions
Accused Products
Abstract
Respiratory assistance is provided to a subject in the form of a pressurized flow of breathable gas. The pressure of the gas is eased during expiration and increased during inspiration. Changes in pressure are triggered and/or cycled based on the monitoring of tidal volume. Volume thresholds that cause triggering and/or cycling are adjusted based on an observed or measured breath rate.
-
Citations
15 Claims
-
1. A method for controlling respiratory assistance of a subject, the subject having an airway, the method comprising:
-
generating a pressurized flow of breathable gas for delivery to the airway of a subject at an inspiratory pressure level during a breath by the subject, wherein the breath has inspiratory volume during an inspiratory phase and expiratory volume during an expiratory phase; determining a breathing rate of the subject; adjusting a first volume threshold based on the determined breathing rate; monitoring the inspiratory volume of the breath by the subject; comparing the inspiratory volume to the first volume threshold to determine when the inspiratory volume of the breath breaches the first volume threshold; and responsive to the inspiratory volume of the breath breaching the first volume threshold, temporarily decreasing the pressure of the pressurized flow of breathable gas from the inspiratory pressure level for expiration by the subject. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A system for controlling respiratory assistance of a subject, the subject having an airway, the system comprising:
-
a pressure generator configured to generate a pressurized flow of breathable gas for delivery to the airway of the subject during breaths of the subject, wherein a breath has inspiratory volume during an inspiratory phase and expiratory volume during an expiratory phase; and one or more processors configured to execute computer program modules, the computer program modules comprising; a breathing rate module configured to determine a breathing rate of the subject, an adjustment module configured to adjust a first volume threshold based on the determined breathing rate, a monitoring module configured to monitor inspiratory volumes of individual breaths by the subject, a comparison module configured to compare the inspiratory volumes of the individual breaths by the subject to the first volume threshold to determine when the inspiratory volumes of the individual breaths have breached the first volume threshold, and a control module configured to control the pressure generator to adjust a pressure level of the pressurized flow of breathable gas, wherein the control module is further configured such that responsive to the inspiratory volume of a given breath breaching the first volume threshold the control module controls the pressure generator to temporarily decrease the pressure level of the pressurized flow of breathable gas for expiration by the subject. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A system configured to control volume based respiratory assistance of a subject, the subject having an airway, the system comprising:
-
means for generating a pressurized flow of breathable gas for delivery to the airway of a subject at an inspiratory pressure level during a breath by the subject, wherein the breath has inspiratory volume during an inspiratory phase and expiratory volume during an expiratory phase; means for determining a breathing rate of the subject; means for adjusting a first volume threshold based on the determined breathing rate; means for monitoring the inspiratory volume of the breath by the subject; means for comparing the inspiratory volume to the first volume threshold to determine when the inspiratory volume of the breath breaches the first volume threshold; and means for temporarily decreasing the pressure level of the pressurized flow of breathable gas from the inspiratory pressure level for expiration by the subject, responsive to the inspiratory volume of the breath breaching the first volume threshold. - View Dependent Claims (12, 13, 14, 15)
-
Specification