Nasal cannula assembly with flow control passage communicating with a deformable reservoir
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorAndrew Martin
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Abstract
The invention concerns a nasal cannula assembly (10) adapted to deliver gases to a patient comprising a first compartment (1) and a second compartment (2) separated by a separation wall (6); a pair of nasal prongs (5) in fluid communication with the first compartment (1); the first compartment (1) comprising a first inlet (11) for introducing a first gas into said first compartment (1); the second compartment (2) comprising a second inlet (2) for introducing a second gas into said second compartment (2); and the separation wall (6) comprising at least one flow restriction element (35) for controlling the passage of gas from the second compartment (2) to the first compartment (1).
Claims19
A nasal cannula assembly (10) adapted to deliver gases to a patient, the nasal cannula assembly (10) comprising:
- a) a first compartment (1) and a second compartment (2) separated by a separation wall (6),
- b) a pair of nasal prongs (5) in fluid communication with the first compartment (1),
- c) the first compartment (1) comprising a first inlet (11) configured to conduct a first gas into said first compartment (1),
- d) the second compartment (2) comprising a second inlet (12) configured to conduct a second gas into said second compartment (2), and
- e) the separation wall (6) comprising at least one flow restriction channel (35) configured to
- permit a passage of gas from the second compartment (2) to the first compartment (1) in a reduced pressure state during an inhalation phase and
- prevent a majority of flow of the second gas from the second compartment (2) to the first compartment (1) in a higher pressure state, during an exhalation phase, relative to the passage of gas during a reduced pressure state, during an inhalation phase,
- wherein the separation wall (6) comprises at least two flow restriction channels (35), and wherein the at least two flow restriction channels (35) are arranged in the separation wall (6), directly opposite the pair of nasal prongs (5).
A nasal cannula assembly (10) adapted to deliver gases to a patient, the nasal cannula assembly (10) comprising:
- a) a first compartment (1) and a second compartment (2) separated by a separation wall (6),
- b) a pair of nasal prongs (5) in fluid communication with the first compartment (1),
- c) the first compartment (1) comprising a first inlet (11) configured to conduct a first gas into said first compartment (1),
- d) the second compartment (2) comprising a second inlet (12) configured to conduct a second gas into said second compartment (2), and
- e) the separation wall (6) comprising at least one flow restriction channel (35) configured to
- permit a passage of gas from the second compartment (2) to the first compartment (1) in a reduced pressure state during an inhalation phase and
- prevent a majority of flow of the second gas from the second compartment (2) to the first compartment (1) in a higher pressure state, during an exhalation phase, relative to the passage of gas during a reduced pressure state, during an inhalation phase,
- wherein the second compartment (2) forms a deformable-wall reservoir comprising a fully inflated internal volume for the gas of about 0.5 to 5 ml.
Dependencies are inferred from the claim text.