Reduced-pressure interfaces, systems, and methods employing a Coanda device
First Claim
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1. A system for treating a wound on a patient, the system comprising:
- a wound-interface member;
a sealing member for disposing over the wound interface member, wherein the sealing member is formed with a treatment aperture;
a reduced-pressure interface coupled to the sealing member, wherein the reduced-pressure interface comprises;
an interface body comprising a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body and further comprising a base portion, anda Coanda device associated with the interface body, wherein the Coanda device comprises;
an annular nozzle forming a central opening and having an interior passage and a nozzle opening,a Coanda surface positioned proximate to and downstream from the nozzle opening,wherein the Coanda device is positioned with a flow clearance from the base portion of the interface body, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, andwherein the Coanda device is configured to direct the combined fluid flow to create a fluid flow over the sealing member; and
a positive-pressure source fluidly coupled to the interior passage of the Coanda device for activating the Coanda device; and
a reduced-pressure source fluidly coupled to conduit port for providing reduced pressure to the wound.
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Abstract
Systems, devices, and methods for treating a wound on a patient involve a reduced-pressure interface having an interface body that facilitates the delivery of reduced pressure to the wound and also a Coanda device that develops an airflow over a wound dressing. The airflow developed by the Coanda device enhances evaporation of liquids from the dressing. Other systems, methods, and devices are presented herein.
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Citations
20 Claims
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1. A system for treating a wound on a patient, the system comprising:
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a wound-interface member; a sealing member for disposing over the wound interface member, wherein the sealing member is formed with a treatment aperture; a reduced-pressure interface coupled to the sealing member, wherein the reduced-pressure interface comprises; an interface body comprising a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body and further comprising a base portion, and a Coanda device associated with the interface body, wherein the Coanda device comprises; an annular nozzle forming a central opening and having an interior passage and a nozzle opening, a Coanda surface positioned proximate to and downstream from the nozzle opening, wherein the Coanda device is positioned with a flow clearance from the base portion of the interface body, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, and wherein the Coanda device is configured to direct the combined fluid flow to create a fluid flow over the sealing member; and a positive-pressure source fluidly coupled to the interior passage of the Coanda device for activating the Coanda device; and a reduced-pressure source fluidly coupled to conduit port for providing reduced pressure to the wound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A reduced-pressure interface for providing reduced pressure to a tissue site and for delivering an airflow to an exterior of a dressing, the reduced-pressure interface comprising:
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an interface body comprising a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body, and further comprising abase portion; and and a Coanda device associated with the interface body, wherein the Coanda device comprises; an annular nozzle forming a central opening and having an interior passage and a nozzle opening, a Coanda surface positioned proximate to and downstream from the nozzle opening, wherein the Coanda device is positioned with a flow clearance from the base portion of the interface body, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, and wherein the Coanda device is configured to direct the combined fluid flow over the exterior of the dressing. - View Dependent Claims (12)
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13. A reduced-pressure interface for use in treating a wound on a patient, the reduced-pressure interface comprising:
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an interface body comprising a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body, and further comprising a base portion and a neck portion; and and a Coanda device disposed on the neck portion of the interface body, wherein the Coanda device comprises; an annular nozzle forming a central opening and having an interior passage and a nozzle opening, wherein the annular nozzle is positioned around the neck portion, a Coanda surface positioned proximate to and downstream from the nozzle opening, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, and wherein the Coanda device is configured to direct the combined fluid towards the base portion of the interface body. - View Dependent Claims (14)
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15. A method of treating a wound on a patient, the method comprising:
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disposing a wound-interface member proximate to the wound; covering the wound-interface member with a sealing member to create a sealed space; coupling an interface body to the sealing member, wherein the interface body comprises a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body, and wherein the interface body further comprises a base portion and a neck portion; disposing a Coanda device around the neck portion of the interface body, wherein the Coanda device comprises; an annular nozzle forming a central opening and having an interior passage and a nozzle opening, wherein the annular nozzle is positioned around the neck portion, a Coanda surface positioned proximate to and downstream from the nozzle opening, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, and wherein the Coanda device is configured to direct the combined fluid towards the base portion of the interface body; and providing reduced pressure to the conduit port of the reduced-pressure interface; and providing positive pressure to the interior passage of the Coanda device to produce the combined fluid flow that is directed toward the base portion of the interface body. - View Dependent Claims (16, 17)
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18. A method for treating a wound site on a patient, the method comprising:
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disposing a wound-interface member proximate to the wound; covering the wound-interface member with a sealing member to create a sealed space; coupling a reduced-pressure interface to the sealing member and fluidly coupling the reduced-pressure interface to the sealed space to deliver reduced pressure thereto, wherein the reduced-pressure interface comprises; an interface body comprising a conduit port, an access port, and a primary conduit, wherein the primary conduit is in fluid communication with the conduit port and access port for transferring reduced pressure through the interface body, and further comprising a base portion, and a Coanda device associated with the interface body, wherein the Coanda device comprises; an annular nozzle forming a central opening and having an interior passage and a nozzle opening, a Coanda surface positioned proximate to and downstream from the nozzle opening, wherein the Coanda device is positioned with a flow clearance from the base portion of the interface body, whereby fluid exiting the nozzle opening entrains additional fluid from the central opening and produces a combined fluid flow, and wherein the Coanda device is configured to direct the combined fluid flow to create a fluid flow over the sealing member; providing reduced pressure to the conduit port of the reduced-pressure interface; and providing positive pressure to the interior passage of the Coanda device to produce the combined fluid flow to generate a fluid flow over the sealing member. - View Dependent Claims (19, 20)
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Specification