Flow Sensing for Gas Delivery to a Patient
First Claim
1. A pressure support system that delivers a pressurized flow of breathable gas to an airway of a patient, the system comprising:
- a pressure generator comprising an impeller and a motor, the motor being configured to generate a torque, the impeller being coupled to the motor such that at least a portion of the torque generated by the motor is provided to the impeller to drive the impeller to rotate through a body of breathable gas, wherein as the impeller rotates through the body of breathable gas the gas applies a torque to the impeller and the impeller applies a corresponding force to the body of breathable gas that generates a pressurized flow of breathable gas for delivery to a patient;
a torque monitor configured to determine information related to the torque generated by the motor;
a rotation monitor configured to determine information related to a rotational velocity of the impeller and/or the motor; and
a processor configured to determine one or more parameters of the pressurized flow of breathable gas generated by the pressure generator based on the information determined by the torque monitor and the information determined by the rotation monitor, wherein the determination of the one or more parameters of the pressurized flow of breathable gas includes an adjustment for at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas.
1 Assignment
0 Petitions
Accused Products
Abstract
A pressure support system that delivers a flow of gas to an airway of a patient. The system comprises a pressure generator, a torque monitor, a rotation monitor, and a processor. The pressure generator comprises an impeller and a motor. The impeller is coupled to the motor such that at least a portion of torque generated by the motor is provided to the impeller. As the impeller rotates through the body of breathable gas, the gas applies a torque to the impeller, and the impeller applies a force to the gas generating the gas flow. The torque monitor determines information related to the torque generated by the motor. The rotation monitor determines information related to a rotational velocity of the impeller and/or the motor. The processor determines one or more parameters of the flow of gas based on the information determined by the torque and rotation monitors.
-
Citations
38 Claims
-
1. A pressure support system that delivers a pressurized flow of breathable gas to an airway of a patient, the system comprising:
-
a pressure generator comprising an impeller and a motor, the motor being configured to generate a torque, the impeller being coupled to the motor such that at least a portion of the torque generated by the motor is provided to the impeller to drive the impeller to rotate through a body of breathable gas, wherein as the impeller rotates through the body of breathable gas the gas applies a torque to the impeller and the impeller applies a corresponding force to the body of breathable gas that generates a pressurized flow of breathable gas for delivery to a patient; a torque monitor configured to determine information related to the torque generated by the motor; a rotation monitor configured to determine information related to a rotational velocity of the impeller and/or the motor; and a processor configured to determine one or more parameters of the pressurized flow of breathable gas generated by the pressure generator based on the information determined by the torque monitor and the information determined by the rotation monitor, wherein the determination of the one or more parameters of the pressurized flow of breathable gas includes an adjustment for at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of delivering a pressurized flow of breathable gas to an airway of a patient, the method comprising:
-
driving an impeller with a motor, the motor being configured to generate a torque, the impeller being coupled to the motor such that at least a portion of the torque generated by the motor is provided to the impeller to drive the impeller to rotate through a body of breathable gas, wherein as the impeller rotates through the body of breathable gas the gas applies a torque to the impeller and the impeller applies a corresponding force to the gas that generates a pressurized flow of breathable gas for delivery to a patient; determining information related to the torque that is generated by the motor; determining information related to a rotational velocity of the impeller and/or the motor; and determining one or more parameters of the pressurized flow of breathable gas generated by the rotation of the impeller based on the information related to the torque generated by the motor and information related to the rotational velocity of the impeller and/or the motor, wherein the determination of the one or more parameters of the pressurized flow of breathable gas is made such that it includes an adjustment for at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A pressure support system that delivers a pressurized flow of breathable gas to an airway of a patient, the system comprising:
-
a pressure generator comprising an impeller and a motor, the motor being configured to generate a torque, the impeller being coupled to the motor such that at least a portion of the torque generated by the motor is provided to the impeller to drive the impeller through a body of gas, wherein as the impeller rotates through the body of breathable gas the gas applies a torque to the impeller and the impeller applies a corresponding force to the body of breathable gas that generates a pressurized flow of breathable gas for delivery to a patient; a torque monitor configured to determine information related to the torque generated by the motor; a rotation monitor configured to determine information related to a rotational velocity of the impeller and/or the motor; a processor comprising; a torque adjustment module configured to receive information related to the torque generated by the motor from the torque monitor, to determine information related to at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas, and to adjust information received from the torque monitor based on the information related to the at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas; and a flow module configured to determine a flow rate of the pressurized flow of breathable gas generated by the pressure generator based on the adjusted information related to the torque generated by the motor and the rotational velocity of the impeller and/or the motor. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
-
-
29. A pressure support system that delivers a pressurized flow of breathable gas to an airway of a patient, the system comprising:
-
means for driving an impeller with a motor, the motor being configured to generate a torque, the impeller being coupled to the motor such that at least a portion of the torque generated by the motor is provided to the impeller to drive the impeller to rotate through a body of breathable gas, wherein as the impeller rotates through the body of breathable gas the gas applies a torque to the impeller and the impeller applies a corresponding force to the gas that generates a pressurized flow of breathable gas for delivery to a patient; means for determining information related to the torque generated by the motor; means for determining information related to a rotational velocity of the impeller and/or the motor; means for determining one or more parameters of the pressurized flow of breathable gas generated by the rotation of the impeller based on the information related to the torque generated by the motor and information related to the rotational velocity of the impeller and/or the motor, wherein the determination of the one or more parameters of the pressurized flow of breathable gas is made such that it includes an adjustment for at least a portion of a difference between the torque generated by the motor and the torque that is applied to the impeller by the body of breathable gas. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
-
Specification