Negative pressure treatment including mechanical and chemical pump
Inventors
Buan, John • Middaugh, Richard L. • Wojciechowski, Timothy • Lash, Thomas E.
Assignees
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Publication Number
US-11813396-B2
Publication Date
2023-11-14
Expiration Date
Abstract
A negative pressure assembly includes a drape, a sealing element, a reactor, and a mechanical pump assembly. The drape covers a dressing site on a patient and seals against the skin upon application of a vacuum while maintaining a negative pressure underneath the drape. When applied to the skin, the sealing element cooperates with the drape to define an enclosed volume covered by the drape and surrounded by the sealing element. The reactor is located with respect to the drape and the sealing element to be in fluid communication with the enclosed volume when the drape is covering the dressing site and is configured to react with and consume a selected gas found in air. The mechanical pump assembly is connectable to the enclosed volume and has a pump chamber in fluid communication with the enclosed volume to draw air from the enclosed volume into the pump chamber.
Core Innovation
The negative pressure therapy assembly includes a drape for covering a dressing site on a patient and capable of maintaining a negative pressure underneath the drape when sealed against skin upon application of a vacuum. A sealing element cooperates with the drape to define an enclosed volume covered by the drape and surrounded by the sealing element. A reactor is located with respect to the drape and the sealing element so as to be in fluid communication with the enclosed volume when the drape is covering the dressing site.
The reactor is configured to react with a selected gas found in air so as to consume the selected gas. The assembly further includes a mechanical pump assembly including a pump chamber that is fluidly connectable to the enclosed volume. When fluidly connected with the enclosed volume, the mechanical pump assembly is configured to draw air from the enclosed volume into the pump chamber.
A chemical pump assembly includes a chemical pump housing and positions the reactor in a chamber of the chemical pump housing. The mechanical pump assembly is connectable to the chemical pump assembly so that the pump chamber is in fluid communication with the enclosed volume via the chemical pump assembly.
The disclosed assembly also includes connection structures for fluid communication between the dressing and the mechanical/chemical pump assemblies, relief/bidirectional valve behavior tied to a predetermined pressure range, a negative-pressure indicator diaphragm that inverts under negative pressure, and a manually actuated mechanical pump with an actuator, a biasing mechanism, and a movable pump element to rapidly establish negative pressure.
Claims Coverage
The partial content provides two independent claims (clm-00001 and clm-00010). Each independent claim includes a common set of inventive features: a sealed drape/enclosed volume, a reactor configured to react with and consume a selected gas found in air, and a mechanical pump fluidly coupled to the enclosed volume through a chemical pump housing/reactor chamber. Claim clm-00010 further adds manually actuated actuation of the mechanical pump with a biasing mechanism and movable pump element.
Sealed drape defining an enclosed volume under negative pressure
A drape capable of maintaining a negative pressure underneath the drape when sealed against skin upon application of a vacuum, together with a sealing element that defines an enclosed volume covered by the drape and surrounded by the sealing element.
Reactor in fluid communication with the enclosed volume to consume selected gas in air
A reactor located with respect to the drape and sealing element so as to be in fluid communication with the enclosed volume when the drape covers the dressing site, the reactor being configured to react with a selected gas found in air so as to consume the selected gas.
Mechanical pump drawing air from the enclosed volume into a pump chamber
A mechanical pump assembly including a pump chamber fluidly connectable to the enclosed volume and configured to draw air from the enclosed volume into the pump chamber when fluidly connected with the enclosed volume.
Chemical pump assembly with reactor in chemical pump housing chamber and fluid coupling via the chemical pump assembly
A chemical pump assembly including a chemical pump housing and the reactor positioned in a chamber of the chemical pump housing, wherein the mechanical pump assembly is connectable to the chemical pump assembly so that the pump chamber is in fluid communication with the enclosed volume via the chemical pump assembly.
Manually actuated actuator with biasing mechanism and movable pump element drawing air
A mechanical pump assembly including a manually-actuated actuator and a biasing mechanism operably connected with a movable pump element, wherein actuation of the manually-actuated actuator results in the biasing mechanism moving the movable pump element so as to draw air into the mechanical pump assembly.
Across both independent claims, the core claimed structure is a negative pressure assembly that forms an enclosed volume under a sealed drape, uses a reactor configured to react with and consume a selected gas found in air, and draws air from the enclosed volume using a mechanical pump chamber fluidly coupled through a chemical pump housing/reactor chamber. The second independent claim further characterizes the mechanical pump assembly as manually actuated with a biasing mechanism and a movable pump element.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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