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.
Claims19
A breathing circuit comprising a combination of an inspiratory tube and an expiratory tube, the breathing circuit configured for use in respiratory therapy for a patient, the breathing circuit comprising:
- the inspiratory tube configured to receive an inspiratory gases flow from a gas source, the inspiratory tube comprising an inspiratory inlet, an inspiratory outlet, and a wall enclosing an inspiratory central bore, wherein the inspiratory central bore of the inspiratory tube is smooth;
- the expiratory tube configured to receive an expiratory gases flow from a patient, the expiratory tube comprising an expiratory inlet, an expiratory outlet, and a wall enclosing an expiratory central bore, wherein the expiratory central bore of the expiratory tube is corrugated;
- and
- a connector that in use connects the inspiratory outlet and the expiratory inlet to a patient interface to transfer the inspiratory gases flow to the patient and the expiratory gases flow from the patient;
- the inspiratory tube having an inner diameter between 9 mm and 13 mm and the expiratory tube having a nominal inner diameter between 13 mm and 19 mm.
A breathing circuit comprising a combination of an inspiratory tube and an expiratory tube, the breathing circuit configured for use in respiratory therapy for a patient, the breathing circuit comprising:
- the inspiratory tube configured to receive an inspiratory gases flow from a gas source, the inspiratory tube comprising an inspiratory inlet, an inspiratory outlet, and a wall enclosing an inspiratory central bore, wherein the inspiratory central bore of the inspiratory tube is smooth;
- the expiratory tube configured to receive an expiratory gases flow from a patient, the expiratory tube comprising an expiratory inlet, an expiratory outlet, and a wall enclosing an expiratory central bore, wherein the expiratory central bore of the expiratory tube is corrugated;
- and
- a connector that in use connects the inspiratory outlet and the expiratory inlet to a patient interface to transfer the inspiratory gases flow from the inspiratory tube to the patient and to transfer the expiratory gases flow from the patient to the expiratory tube;
- the inspiratory tube having an inner diameter between 9 mm and 13 mm and a length, and the expiratory tube having a nominal inner diameter between 13 mm and 19 mm and a length, wherein the breathing circuit is suitable for treatment of pediatric and neonatal patients.
Dependencies are inferred from the claim text.