Ventilator Respiratory Gas Accumulator With Sampling Chamber
First Claim
1. A medical ventilator system, comprising:
- a processor;
a plurality of sources of different gases controlled by the processor;
an accumulator adapted to receive the different gasses forming a gas mixture, wherein during ventilation of a patient, the accumulator stores the gas mixture at a first pressure;
a sampling chamber adapted to receive a gas mixture portion from the accumulator at a second pressure less than the first pressure; and
a sensor adapted to measure a concentration of the gas mixture portion received by the sampling chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
This disclosure describes systems and methods for ventilating a patient with a system that includes an accumulator for storing a gas mixture. The disclosure describes a novel approach for determining the concentrations of gas found in the accumulator by utilizing a sampling chamber. The disclosure further describes a novel approach for a fast delivery of a change in gas mixture to a patient by utilizing a variable-sized accumulator. This disclosure also 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 at least one of a dip-tube, a purge valve, and a variable size accumulator.
-
Citations
14 Claims
-
1. A medical ventilator system, comprising:
-
a processor; a plurality of sources of different gases controlled by the processor; an accumulator adapted to receive the different gasses forming a gas mixture, wherein during ventilation of a patient, the accumulator stores the gas mixture at a first pressure; a sampling chamber adapted to receive a gas mixture portion from the accumulator at a second pressure less than the first pressure; and a sensor adapted to measure a concentration of the gas mixture portion received by the sampling chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for ventilating a patient, the method comprising:
-
controlling when a sample of a gas mixture is received by a sampling chamber from an accumulator; controlling a volume of the sample received by the sampling chamber from the accumulator; controlling a pressure of the sample in the sampling chamber, wherein the pressure of the sample in the sampling chamber is less than a pressure of the gas mixture in the accumulator during ventilation of a patient at the same time; and measuring a gas mixture concentration of the sample received by the sampling chamber. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A pressure support system comprising:
-
a processor; a pressure generating system controlled by the processor, the pressure generating system is adapted to generate a flow of breathing gas; a ventilation system including a patient circuit controlled by the processor; a plurality of sources of different gases controlled by the processor; an accumulator adapted to receive the different gasses forming a gas mixture, wherein during ventilation of a patient, the accumulator stores the gas mixture at a first pressure; a sampling chamber adapted to receive a gas mixture portion from the accumulator at a second pressure less than the first pressure; and a sensor adapted to measure a concentration of the gas mixture portion received by the sampling chamber.
-
Specification