Negative pressure device having oxygen scavenger and volume reduction
Inventors
Buan, John • Middaugh, Richard L. • Wojciechowski, Timothy • Lash, Thomas E.
Assignees
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Publication Number
US-12161794-B2
Publication Date
2024-12-10
Expiration Date
Abstract
A negative pressure tissue treatment system useful for negative pressure therapy includes a drape, a gasket material, a reactor housing, a reactor, and any fluid connection(s). The drape covers the skin of a patient and maintains negative pressure under the drape. The gasket material cooperates with the drape to define an enclosed volume that is scaled by the gasket material. The reactor housing defines a closed chamber in fluid communication with the enclosed volume, and the reactor is disposed in the reactor housing. The reactor consumes oxygen from a system volume defined by the enclosed volume, closed chamber, and/or any fluid connection(s). As a result of the oxygen consumption, the system volume is reduced to between about 95% to about 80% of the initial system volume.
Core Innovation
The invention relates to a negative pressure tissue treatment system in which a drape formed of a flexible material capable of maintaining a negative pressure underneath the drape upon application of a vacuum is affixed to skin around a tissue site. A gasket material is secured on a skin-facing surface of the drape so that the gasket material together with the drape define an enclosed volume beneath the drape and surrounded by the gasket material.
A reactor is provided in fluid communication with the enclosed volume, and the reactor is housed in a reactor housing that defines a closed chamber. The closed chamber is in fluid communication with the enclosed volume via a fluid connection so that an overall system volume is defined by the enclosed volume, the closed chamber, and the fluid connection.
The reactor is configured to consume oxygen from the system volume, thereby causing the system volume to reduce from an initial system volume toward a reduced system volume that is between about 95% and about 80% of the initial system volume as a result of the reactor consuming oxygen from the system volume. The drape is configured such that the system volume reduction occurs in response to the oxygen consumption, while maintaining negative pressure underneath the drape.
The described enclosed volume reduction and component response are linked to the oxygen-consuming function of the reactor, including a resilient component that is drawn into a closed chamber when the system volume decreases and, in some embodiments, a resilient element associated with a fitting connected to an opening in the drape.
Claims Coverage
The document includes two independent claims. The shared inventive concept is a negative pressure tissue treatment system in which a drape and gasket define an enclosed volume in fluid communication with a reactor housed in a closed chamber, where oxygen consumption reduces a system volume to between about 95% and about 80% of its initial value.
Drape and gasket defining an enclosed volume under negative pressure
A negative pressure tissue treatment system comprising a drape formed of a flexible material capable of maintaining a negative pressure underneath the drape upon application of a vacuum, and a gasket material secured on a skin-facing surface of the drape, the gasket material together with the drape defining an enclosed volume beneath the drape and surrounded by the gasket material when the drape is affixed to skin around a tissue site.
Oxygen-consuming reactor in a closed chamber reducing system volume
A reactor in fluid communication with the enclosed volume, wherein a reactor housing defining a closed chamber for housing the reactor is in fluid communication with the enclosed volume via a fluid connection, and wherein the enclosed volume, the closed chamber and the fluid connection define a system volume, the reactor is configured to consume oxygen from the system volume, and the drape is configured such that the system volume reduces from an initial system volume toward a reduced system volume that is between about 95% and about 80% of the initial system volume as a result of the reactor consuming oxygen from the system volume.
Drape and gasket with reactor housing in fluid communication for oxygen consumption
A negative pressure tissue treatment system comprising a drape formed of a flexible material capable of maintaining a negative pressure underneath the drape upon application of a vacuum; a gasket material secured on a skin-facing surface of the drape, the gasket material together with the drape defining an enclosed volume beneath the drape and surrounded by the gasket material when the drape is affixed to skin around a tissue site; a reactor housing defining a closed chamber in fluid communication with the enclosed volume; and a reactor positioned in the closed chamber and configured to consume oxygen, wherein the closed chamber and the enclosed volume define a system volume.
System volume reduction to 95%–80% caused by oxygen consumption with fluid connection defining system volume
The drape and the reactor housing are configured such that the system volume reduces from an initial system volume toward a reduced system volume that is between about 95% and about 80% of the initial system volume as a result of the reactor consuming oxygen from the system volume, wherein the enclosed volume is in fluid communication with the closed chamber via a fluid connection, the fluid connection further defines the system volume.
Across both independent claims, the coverage centers on maintaining negative pressure under a flexible drape, using a gasket to define an enclosed volume, and connecting that volume to a reactor in a closed chamber. The reactor consumes oxygen from the system volume so that the system volume reduces to between about 95% and about 80% of its initial value, with the fluid connection included in defining the system volume in both claims.
Stated Advantages
Reduces the system volume controllably from an initial system volume toward a reduced system volume that is between about 95% and about 80% as a result of oxygen consumption by the reactor.
Lowers negative pressure from the natural chemical scavenger level by linking volume reduction to a target negative pressure range.
Documented Applications
Negative pressure tissue treatment system for applying negative pressure underneath a drape affixed to skin around a tissue site.
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