Breathing circuit
First Claim
Patent Images
1. A breathing circuit which comprises:
- coupling means adapted to be coupled to a patient and through which the patient can inhale and exhale;
a source of supply fluid for the patient;
a coaxial tube type main tube coupled between said coupling means and said supply source, and comprising an inner flexible tube constituting an inhalant circuit and a corrugated outer tube having a larger average wall thickness than said inner tube, said outer tube encircling the periphery of said inner tube and defining an exhalant circuit in conjunction with said inner tube; and
an inner tube retaining member disposed at least at one end of said coaxial tube type main tube for keeping said inner tube and said outer tube at a prescribed distance from each other;
the average wall thickness of said inner tube being 20 to 60% of the average wall thickness of said outer tube.
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Abstract
A breathing circuit which comprises a coaxial tube type main tube comprising an inner flexible tube constituting an inhalant circuit and a corrugated outer tube having a larger average wall thickness than said inner tube, encircling the periphery of said inner tube, and defining an exhalant circuit in conjunction with said inner tube; and an inner tube retaining member disposed at least at one end of said coaxial tube type main tube and serving to keep said inner tube and said outer tube at a prescribed distance from each other.
236 Citations
26 Claims
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1. A breathing circuit which comprises:
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coupling means adapted to be coupled to a patient and through which the patient can inhale and exhale; a source of supply fluid for the patient; a coaxial tube type main tube coupled between said coupling means and said supply source, and comprising an inner flexible tube constituting an inhalant circuit and a corrugated outer tube having a larger average wall thickness than said inner tube, said outer tube encircling the periphery of said inner tube and defining an exhalant circuit in conjunction with said inner tube; and an inner tube retaining member disposed at least at one end of said coaxial tube type main tube for keeping said inner tube and said outer tube at a prescribed distance from each other; the average wall thickness of said inner tube being 20 to 60% of the average wall thickness of said outer tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A breathing circuit which comprises:
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a coaxial tube type main tube comprising an inner flexible tube constituting an inhalant circuit and a corrugated outer tube having a larger average wall thickness than said inner tube, said average wall thickness of said inner tube being 20 to 60% of the average wall thickness of said inner tube, said outer tube encircling the periphery of said inner tube and defining an exhalant circuit in conjunction with said inner tube; an inner tube retaining member disposed at one end of said coaxial tube type main tube and maintaining said inner tube and said outer tube at a prescribed distance from each other; a manifold disposed at the other end of said coaxial tube type main tube and provided with an exhalation valve and a nebulizer; said manifold comprising; an inner tube portion communicating with said nebulizer and connected to said flexible inner tube, an outer tube portion disposed on the periphery of said inner tube portion, means being provided to close said outer tube portion relative to said nebulizer, and said outer tube portion being connected to said corrugated outer tube, an exhalation valve communicating with said outer tube portion, and an inhalant gas inlet tube portion communicating with said nebulizer so that said inhalant gas inlet portion and said inner and outer tube portions are all in communication, and that an exhalation flow path is provided to said exhalation valve; and an inhalant gas lead tube connected to said inhalant gas inlet tube portion. - View Dependent Claims (26)
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Specification