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US 9,789,273 B2Granted
Sensor and valve integrated into a patient interface
AssigneeKoninklijke Philips N.V.
InventorsChristopher Scott Lucci, Harol Allen Lockhart, David W. Smith, IV, Nathan Francis O'Connor, Jonathan Sayer Grashow
Life of this patent
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Abstract
An improved patient interface assembly and pressure support system integrate a pressure sensor and a valve into the patient interface assembly and employs closed loop control between the sensor and the valve in order to limit delay between the time at which a condition indicative of abnormal breathing or flow load during normal breathing is experienced by a patient and the time at which altered pressure support is received by the patient.
Claims14
A patient interface assembly structured to be in fluid communication with a pressure source that provides a flow of a fluid, comprising:
- a patient interface device having a chamber formed therein that is structured to be in fluid communication with a breathing passage of a patient, the patient interface device being structured to be positioned on a head of the patient when the patient interface assembly is donned by the patient;
- a first pressure sensor structured to detect pressure conditions within the chamber, the first pressure sensor being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient;
- a valve adapted to adjust a pressure within the patient interface device when the patient interface assembly is donned by the patient, the valve being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient;
- and
- a compliant tube element having variable compliance and resistance properties and being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient such that the compliant tube element extends for a length along the head of the patient, the patient interface device being positioned downstream of the valve through the tube element such the patient interface device is separated from the valve by the length of the compliant tube element that extends along the head of the patient, wherein closed loop control is employed to control the valve and thereby the pressure delivered to the patient through the patient interface device based on at least the pressure conditions detected by the first pressure sensor, and wherein the valve is structured to be positioned a certain distance from the breathing passage of the patient when the patient interface assembly is donned by the patient such that changes in the pressure delivered to the patient that result from action of the valve are communicated to the patient with a delay of under one millisecond, wherein the pressure source is upstream of the valve and separated from the head of the patient when the patient interface assembly is donned.
2 more elements
A method of providing a flow breathing gas to a patient, comprising:
- positioning a patient interface assembly on a head of the patient, the patient interface assembly being in fluid communication with a pressure source that provides a flow of gas and including:
- (i) a patient interface device having a chamber formed therein that is structured to be in fluid communication with a breathing passage of the patient, the patient interface device being structured to be positioned on a head of the patient when the patient interface assembly is donned by the patient;
- (ii) a first pressure sensor structured to detect pressure conditions within the chamber, the first pressure sensor being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient;
- (iii) a valve adapted to adjust a pressure within the patient interface device when the patient interface assembly is donned by the patient, the valve being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient;
- and
- (iv) a compliant tube element having variable compliance and resistance properties and being structured to be positioned on the head of the patient when the patient interface assembly is donned by the patient such that the compliant tube element extends for a length along the head of the patient, the patient interface device being positioned downstream of the valve through the tube element such the patient interface device is separated from the valve by the length of the compliant tube element that extends along the head of the patient,
- wherein the valve is adapted to control a pressure or flow of gas in the compliant tube;
- detecting pressure conditions within chamber using the first pressure sensor;
- and
- employing closed loop control to control the valve and thereby the pressure delivered to the patient through the patient interface device based on at least the pressure conditions detected by the first pressure sensor, wherein the valve is structured to be positioned a certain distance from the breathing passage of the patient when the patient interface assembly is donned by the patient such that changes in the pressure delivered to the patient that result from action of the valve are communicated to the patient with a delay of under one millisecond,
- wherein the pressure source is upstream of the valve and separated from the head of the patient when the patient interface assembly is donned.
8 more elements
Dependencies are inferred from the claim text.