Apparatus for measuring properties of gases supplied to a patient
AssigneeFisher & Paykel Healthcare Limited
InventorsMatthew Jon Payton, Kevin Peter O'Donnell, Andrew Baden Clark, Christopher Simon James Quill, Peter Geoffrey Hawkins
Life of this patent
Estimating the term…
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 invention disclosed is related to measurement of properties, particularly temperature (thermister 23), of gases flowing through a heated tube (3), supplying gases to a patient, which utilises the heating wire (21, 28) within the tube.
Claims22
A conduit for supplying gases, the conduit comprising:
- a heater wire that is arranged and configured to heat the conduit;
- the conduit comprising a proximal end and a distal end, the proximal end of the conduit configured to be in fluid communication with a source of breathing gases and the distal end of the conduit configured to be in fluid communication with a patient interface;
- and
- an electronic circuit comprising a gases property sensor positioned proximate to the distal end of the conduit, the gases property sensor being configured to measure at least a temperature of gases flowing through the conduit.
A conduit for supplying gases, the conduit comprising:
- a heater wire that is arranged and configured to heat the conduit;
- the conduit comprising a proximal end and a distal end, the proximal end of the conduit configured to be in fluid communication with a source of breathing gases and the distal end of the conduit configured to be in fluid communication with a patient interface;
- and
- a gases property sensor positioned closer to the distal end of the conduit than the proximal end of the conduit, the gases property sensor being configured to measure at least one property of gases flowing, the gases property sensor being positioned within a housing and protruding from a wall of the conduit into the gases flowing in use.
An apparatus for supplying gases, the apparatus comprising:
- a gases supply;
- and
- a conduit comprising:
- a heater wire that is arranged and configured to heat the conduit;
- a proximal end that is configured to be in fluid communication with the gases supply;
- a distal end that is configured to be in fluid communication with a patient interface;
- and
- a gases property sensor that is configured to measure at least one property of gases flowing through the conduit in use, the gases property sensor being positioned proximate to the distal end of the conduit, the gas property sensor being positioned in a housing and protruding from a wall of the conduit into the gases flowing.
Dependencies are inferred from the claim text.