Tracheal couplings and associated systems and methods
AssigneeFisher & Paykel Healthcare Limited
InventorStanislav Tatkov
Life of this patent
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Abstract
A tracheal coupling for interfacing between a patient and a gases source, the connector comprising a patient port (33) for connecting to the trachea interface/insert, an outlet port (36), and inlet port (31) between patient port and outlet port for receiving a flow of gases from the gases flow source, the connector restricting expiratory flow in use to produce PEEP of at least 1 cm H2O when flow to the inlet port is 50 liters per minute. A system or method for supplying gases to a patient using the connector is also disclosed. Flow restriction is implemented using an orifice that can be adjustable, jetting or turbulence induced by a directed flow nozzle (30). PEEP can also be varied by flow control of gas source.
Claims19
A tracheal coupling for interfacing between a patient and a gases source, the coupling comprising:
- a patient port for connecting to a trachea interface in or on a patient;
- an outlet end;
- a wall extending between the patient port and the outlet end;
- an inlet port for receiving an incoming flow of gases from the gases source, the inlet port defining an outflow end, wherein an entirety of the outlet end is spaced from the outflow end along an axis of the wall and is located on an opposite side of the outflow end from the patient port;
- and
- a flow restriction to restrict expiratory flow in use to produce PEEP of at least 1 cm H2O when flow to the inlet port is 50 liters per minute, the flow restriction located between the outflow end and the outlet end or at the outlet end, the flow restriction comprising an aperture having an area smaller than a cross-sectional area of the outflow end of the inlet port, the flow restriction comprising a blocking element configured to block a portion of the aperture, wherein the blocking element is adjustable to allow adjustment of the portion of the aperture blocked by the blocking element.
A method of providing breathing gases to a patient comprising:
- a) attaching the tracheal coupling to a breathing tube of the patient, the tracheal coupling comprising a patient port connected to a trachea interface in or on a patient, an outlet end, a wall extending between the patient port and the outlet end, an inlet port for receiving an incoming flow of gases from a gases source, the inlet port defining an outflow end, wherein an entirety of the outlet end is spaced from the outflow end along an axis of the wall and is located on an opposite side of the outflow end from the patient port and a flow restriction to restrict expiratory flow in use to produce PEEP of at least 1 cm H2O when flow to the inlet port is 50 liters per minute, the flow restriction located between the outflow end and the outlet end or at the outlet end, the flow restriction comprising an aperture having an area smaller than a cross-sectional area of the outflow end of the inlet port, the flow restriction comprising a blocking element configured to block a portion of the aperture, wherein the blocking element is adjustable to allow adjustment of the portion of the aperture blocked by the blocking element;
- b) selecting a flow level for a supply of gases to the coupling to generate a desired amount of PEEP;
- c) supplying the flow level of gases to the inlet port of the coupling.
A method of providing breathing gases to a patient comprising:
- a) attaching the tracheal coupling to a breathing tube of the patient, the tracheal coupling comprising a patient port connected to a trachea interface in or on a patient, an outlet end, a wall extending between the patient port and the outlet end, an inlet port for receiving an incoming flow of gases from a gases source, the inlet port defining an outflow end, wherein an entirety of the outlet end is spaced from the outflow end along an axis of the wall and is located on an opposite side of the outflow end from the patient port and a flow restriction to restrict expiratory flow in use to produce PEEP of at least 1 cm H2O when flow to the inlet port is 50 liters per minute, the flow restriction located between the outflow end and the outlet end or at the outlet end, the flow restriction comprising an aperture having an area smaller than a cross-sectional area of the outflow end of the inlet port, the flow restriction comprising a blocking element configured to block a portion of the aperture, wherein the blocking element is adjustable to allow adjustment of the portion of the aperture blocked by the blocking element;
- b) adjusting the blocking element for the coupling according to an expected flow of gases and a desired amount of PEEP,
- c) supplying a flow of gases to the inlet port of the coupling.
Dependencies are inferred from the claim text.