Medical tubes for breathing circuit
AssigneeFisher & Paykel Healthcare Limited
InventorsMatthew Liam BUSWELL, Gavin Walsh MILLAR, James William STANTON
Life of this patent
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Abstract
A breathing circuit for use in respiratory therapy includes an inspiratory tube and an expiratory tube. The inspiratory tube of the breathing circuit has a smooth bore. The expiratory tube of the breathing circuit is corrugated. Preferably, the expiratory tube is vapor permeable. Using the combination of a smooth bore inspiratory tube with a corrugated expiratory tube has the unexpected result of improving the performance of the breathing circuit and its components.
Claims29
(canceled)
A breathing circuit kit for use in respiratory therapy for a patient, the breathing circuit kit comprising:
- an inspiratory tube configured to receive inspiratory gases flow from a gas source, the inspiratory tube comprising an inspiratory inlet, an inspiratory outlet, and an inspiratory wall positioned between the inspiratory inlet and the inspiratory outlet, the inspiratory wall enclosing an inspiratory central bore, the inspiratory wall of the inspiratory tube not being corrugated and having an inner diameter between 3 mm and 13 mm;
- and
- an expiratory tube configured to receive an expiratory gases flow from a patient, the expiratory tube comprising an expiratory inlet, an expiratory outlet, and an expiratory wall positioned between the expiratory inlet and the expiratory outlet, the expiratory wall enclosing an expiratory central bore, the expiratory wall of the expiratory tube being corrugated and having a nominal inner diameter between 7 mm and 13 mm.
Dependencies are inferred from the claim text.