Catheter system for delivery of aerosolized medicine for use with pressurized propellant canister
First Claim
1. An improved system for the delivery of an aerosolized medicine to a patient'"'"'s respiratory system comprising:
- a pressurized canister that contains a mixture of fine particles of a medicine and a propellant in a liquid state and further that has an outlet from which the medicine and propellant can exit the canister;
an endotracheal tube having a ventilation lumen;
an extension catheter having a proximal end and a distal end and a lumen extending from the proximal end to a distal orifice located at said distal end, said extension catheter located in said ventilation lumen of said endotracheal tube, and extending distally of a distal end of said endotracheal tube into an air flow passage of the patient; and
a connection between said proximal end of said extension catheter and said outlet of said pressurized canister to provide a fluid connection between said canister and said lumen of said extension catheter to permit liquid medicine and propellant to be conveyed from said canister through said lumen of said extension catheter and out said distal orifice of said extension catheter where the propellant evaporates and an aerosol of the liquid medical agent is generated.
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Accused Products
Abstract
An improved system for delivery of an aerosolized medicine to a patient'"'"'s respiratory system. The system uses a pressurized canister that contains a mixture of a medicine and a propellant which may be in a liquid state. The canister has an outlet from which the mixture can exit. The system includes an extension catheter that connects at a proximal end to the outlet of the canister. The extension catheter has a length such that a distal end can be positioned either in an endotracheal tube or deep in the respiratory tract of the patient while the proximal end of the extension catheter is connected to the canister which is located outside the patient'"'"'s body. The extension catheter includes at least one lumen extending therethrough for conveying the medicine and liquid propellant mixture from the canister to a distal exit orifice where an aerosol can be generated as the propellant evaporates. The aerosolized medicine is carried by the patient'"'"'s inhalation and delivered to the lungs. The extension catheter may be positioned in an endotracheal tube or alternatively may be used with a patient who is not intubated.
387 Citations
26 Claims
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1. An improved system for the delivery of an aerosolized medicine to a patient'"'"'s respiratory system comprising:
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a pressurized canister that contains a mixture of fine particles of a medicine and a propellant in a liquid state and further that has an outlet from which the medicine and propellant can exit the canister; an endotracheal tube having a ventilation lumen; an extension catheter having a proximal end and a distal end and a lumen extending from the proximal end to a distal orifice located at said distal end, said extension catheter located in said ventilation lumen of said endotracheal tube, and extending distally of a distal end of said endotracheal tube into an air flow passage of the patient; and a connection between said proximal end of said extension catheter and said outlet of said pressurized canister to provide a fluid connection between said canister and said lumen of said extension catheter to permit liquid medicine and propellant to be conveyed from said canister through said lumen of said extension catheter and out said distal orifice of said extension catheter where the propellant evaporates and an aerosol of the liquid medical agent is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for delivery of an aerosolized medicine to a patient'"'"'s respiratory tract comprising:
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a pressurized canister containing a mixture of fine particles of a medicine and a liquid propellant and further in which an aerosolized dose of the medicine can be generated when the mixture is expelled to ambient pressure at which the propellant in the mixture evaporates; a catheter having a lumen extending therethrough and a length such that a proximal end of said catheter is located outside the patient'"'"'s body and a distal end is located in an air flow passage in the patient'"'"'s respiratory tract, said distal end having an exit orifice communicating with said lumen; a proximal portion of said catheter and said canister having a permanent connection to each other so as to permit the mixture from said canister to be transmitted into the lumen of said catheter; and an actuator valve located in at least one of said catheter and said canister to regulate the flow of mixture from said canister to said exit orifice.
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10. An apparatus for delivery of an aerosolized medicine to a patient'"'"'s respiratory tract from a pressurized canister of a type that contains a mixture of fine particles of a medicine and a liquid propellant and further in which an aerosolized dose of the medicine is generated when the mixture is expelled to ambient pressure at which the propellant in the mixture evaporates, said apparatus comprising:
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a catheter having a lumen extending therethrough and a length such that a proximal end of said catheter is located outside the patient'"'"'s body and a distal end is located in an air flow passage in the patient'"'"'s respiratory tract, said distal end having an exit orifice communicating with said lumen; a connection between a proximal portion of said catheter and said canister to permit the mixture from said canister to be transmitted into the lumen of said catheter, said lumen and said exit orifice sized to maintain a pressure inside said lumen sufficient to maintain said mixture in a liquid state; and a baffle located adjacent to said exit orifice. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for the delivery to a patient'"'"'s respiratory tract of an aerosolized medicine from a pressurized canister containing a mixture of a medicine and a liquid propellant that evaporates upon exiting to ambient pressure to generate an aerosolized dose of said medicine, said apparatus comprising:
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a catheter having a shaft with a length such that a proximal end of said catheter is located outside the patient'"'"'s body and a distal end is located in an air flow passage in the patient'"'"'s respiratory tract, wherein at least of portion of said shaft has a plurality of parallel lumens extending therethrough; and a connection between a proximal portion of said catheter and an outlet of a canister to permit the mixture of medicine and propellant from said canister to be transmitted through said plurality of parallel lumens and out at least one exit orifice located at the distal end of said catheter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for the delivery to a patient'"'"'s respiratory tract of an aerosolized medicine from a pressurized canister containing a mixture of a medicine and a liquid propellant that evaporates upon exiting to ambient pressure to generate an aerosolized dose of said medicine, said apparatus comprising:
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a catheter having a shaft with a length such that a proximal end of said catheter is located outside the patient'"'"'s body and a distal end is located in an air flow passage in the patient'"'"'s respiratory tract, said catheter shaft having at least one lumen extending from said proximal end to said distal end, and further in which said catheter shaft includes a plurality of exit orifices located at said distal end, said distal exit orifices communicating with said at least one lumen; and a connection between a proximal portion of said catheter and an outlet of said canister to permit the mixture of medicine and propellant from said canister to be transmitted through said at least one lumen and out said plurality of exit orifices.
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Specification