Respiratory assistance device and method of controlling said device
First Claim
Patent Images
1. A method of controlling a flow rate of respiratory gases supplied to a patient by a respiratory assistance device configured to be in fluid communication with an inspiratory conduit and a patient interface to deliver gases to the patient, and configured to be in fluid communication with a respiratory gases source, the method comprising:
- controlling the flow rate of respiratory gases supplied to the patient according to a first predetermined gases pressure/flow rate profile in a first mode defined for at least a portion of a breathing cycle of the patient;
controlling the flow rate of respiratory gases supplied to the patient according to a second predetermined gases pressure/flow rate profile in a second mode for at least a portion of the breathing cycle of the patient, wherein the second predetermined gases pressure/flow rate profile is different to the first predetermined gases pressure/flow rate profile; and
controlling the flow rate of respiratory gases supplied to the patient according to at least one further predetermined gases pressure/flow rate profile in at least one further mode for at least a portion of the breathing cycle of the patient, wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate at an end of expiration and/or a beginning of inspiration to increase clearance of anatomical dead space in the patient and wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate such that the flow rate decreases to a flow rate higher than the second predetermined gases pressure/flow rate profile at an end of the at least one further predetermined gases pressure/flow rate profile.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of controlling a flow rate of gases supplied to a patient by a respiratory assistance device includes controlling the supply gases flow rate so as to deliver gases to the patient according to a predetermined gases pressure/flow rate profile for at least a portion of the breathing cycle. A profile may be achieved that provides the patient with a particular benefit or therapy.
23 Citations
21 Claims
-
1. A method of controlling a flow rate of respiratory gases supplied to a patient by a respiratory assistance device configured to be in fluid communication with an inspiratory conduit and a patient interface to deliver gases to the patient, and configured to be in fluid communication with a respiratory gases source, the method comprising:
-
controlling the flow rate of respiratory gases supplied to the patient according to a first predetermined gases pressure/flow rate profile in a first mode defined for at least a portion of a breathing cycle of the patient; controlling the flow rate of respiratory gases supplied to the patient according to a second predetermined gases pressure/flow rate profile in a second mode for at least a portion of the breathing cycle of the patient, wherein the second predetermined gases pressure/flow rate profile is different to the first predetermined gases pressure/flow rate profile; and controlling the flow rate of respiratory gases supplied to the patient according to at least one further predetermined gases pressure/flow rate profile in at least one further mode for at least a portion of the breathing cycle of the patient, wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate at an end of expiration and/or a beginning of inspiration to increase clearance of anatomical dead space in the patient and wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate such that the flow rate decreases to a flow rate higher than the second predetermined gases pressure/flow rate profile at an end of the at least one further predetermined gases pressure/flow rate profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 21)
-
-
12. A respiratory assistance device configured to be in fluid communication with an inspiratory conduit and a patient interface to deliver gases to a patient, and configured to be in fluid communication with a respiratory gases source, the respiratory assistance device comprising:
-
a controller operative to control a flow rate of respiratory gases supplied to the patient according to a first predetermined gases pressure/flow rate profile in a first mode defined for at least a portion of a breathing cycle of the patient; the controller operative to control a flow rate of respiratory gases supplied to the patient according to a second predetermined gases pressure/flow rate profile in a second mode for at least a portion of the breathing cycle of the patient, wherein the second predetermined gases pressure/flow rate profile is different to the first predetermined gases pressure/flow rate profile; and the controller operative to control a flow rate of respiratory gases supplied to the patient according to at least one further predetermined gases pressure/flow rate profile in at least one further mode for at least a portion of the breathing cycle of the patient, wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate at an end of expiration and/or a beginning of inspiration to increase clearance of anatomical dead space in the patient and wherein the at least one further predetermined gases pressure/flow rate profile is configured to alter the flow rate such that the flow rate decreases to a flow rate higher than the second predetermined gases pressure/flow rate profile at an end of the at least one further predetermined gases pressure/flow rate profile. - View Dependent Claims (17, 18, 19, 20)
-
-
15. The method of 14, wherein the at least one further predetermined gases pressure/flow rate profile is further configured to, following increasing the flow at the end of expiration and/or the beginning of inspiration, immediately reduce the flow rate to a level no less than 10 L/min.
-
16. The method of 14, wherein the at least one predetermined gases pressure/flow rate profile is further configured to, following increasing the flow at the end of expiration and/or beginning of inspiration, immediately reduce flow to a level that meets, or is in excess of, peak inspiratory demand.
Specification