Apparatus for measuring properties of gases supplied to a patient
DCFirst Claim
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1. A conduit for supplying gases, the conduit comprising:
- a proximal end configured to connect to a source of breathing gases;
a distal end configured to connect to a patient interface;
a wall defining a lumen for delivering a flow of gases to a patient;
a wire provided within or around the conduit and extending at least a portion of a length of the conduit, the length of the conduit extending from a proximal portion of the conduit to a distal portion of the conduit; and
a gases property sensor configured to measure at least one property of the flow of gases and positioned at the distal portion of the conduit, the gases property sensor connected to the wire, and the gases property sensor disposed within a housing and within the flow of gases such that the gases property sensor is able to measure the at least one property of the flow of gases.
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Abstract
The gases temperature supplied to a patient when the patient is undergoing treatment such as oxygen therapy or positive pressure treatment for conditions such as Obstructive Sleep Apnea (OSA) or Chronic Obstructive Pulmonary Disease (COPD) is often measured for safety and to enable controlling of the humidity delivered to the patient. The apparatus is related to measurement of properties, particularly temperature (thermister 23), of gases flowing through a heated tube (3), supplying gases to a patient, which utilizes the heating wire (21, 28) within the tube.
59 Citations
33 Claims
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1. A conduit for supplying gases, the conduit comprising:
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a proximal end configured to connect to a source of breathing gases; a distal end configured to connect to a patient interface; a wall defining a lumen for delivering a flow of gases to a patient; a wire provided within or around the conduit and extending at least a portion of a length of the conduit, the length of the conduit extending from a proximal portion of the conduit to a distal portion of the conduit; and a gases property sensor configured to measure at least one property of the flow of gases and positioned at the distal portion of the conduit, the gases property sensor connected to the wire, and the gases property sensor disposed within a housing and within the flow of gases such that the gases property sensor is able to measure the at least one property of the flow of gases. - View Dependent Claims (2, 3, 4, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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5. An apparatus configured to supply a stream of gases to a patient, the apparatus comprising:
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a gases supply; a conduit configured to connect to the gases supply and to deliver the stream of the gases to the patient; a wire located throughout a length of the conduit; an electrical circuit connected to the wire, the electrical circuit configured to provide a signal to a controller through the wire indicative of at least one property of the stream of gases, the controller configured to determine the at least one property of the stream of gases, wherein at least a portion of the electrical circuit is configured to be positioned within the stream of gases; and an overmolding enclosing at least part of the electrical circuit, the overmolding extending into a region conveying the stream of gases through the conduit. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 27, 28, 29, 30, 31, 32, 33)
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Specification