Negative pressure wound treatment device, and methods
Inventors
Anderson, Paul J. • Duchon, Douglas
Assignees
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Publication Number
US-8992492-B2
Publication Date
2015-03-31
Expiration Date
Abstract
A negative pressure (i.e., vacuum or suction) wound healing device and system incorporating the device. The device of the present disclosure is smaller, lighter, portable, and overall more manageable by both the user and the medical personnel than the conventional systems. The device could be readily worn by the user.
Core Innovation
The invention provides a compact portable negative-pressure wound therapy system for applying negative pressure on a wound. The system includes a device configured to provide negative pressure on the wound and a dressing material sealably covering the wound, with an expandable spray-in foam located within the wound below the dressing material and exposed to the negative pressure provided by the device.
The spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound. The system further includes a plurality of vacuum lines extending between the device and the dressing material, each of the plurality of vacuum lines used to provide negative pressure to the wound sealably covered by the dressing material.
The device architecture emphasizes manageability compared with conventional large canister systems by using a portable negative-pressure wound therapy device configuration. The disclosure further describes a wound cover/drape with multiple holes and spacers to diffuse vacuum to the foam, together with optional subsystems including flexible expandable exudate collection bag or semi-rigid expandable canister, selectable pump types, vacuum lines for different wound regions with potentially different suction levels, wound monitoring/telemetry, pressure sensing for clogging/healing indication, and intelligent vacuum control algorithms to reduce pain.
Claims Coverage
The document includes one independent claim. The claim coverage concentrates on the wound dressing structure that incorporates an expandable spray-in foam transitioning from an initial flowable state to a final set state under negative pressure, together with multiple vacuum lines between the device and the wound to deliver negative pressure through a sealable dressing.
A system for applying negative pressure on a wound with an expandable spray-in foam dressing and multiple vacuum lines
A system comprising a device including structure configured to provide negative pressure on the wound; a dressing material sealably covering the wound and an expandable spray-in foam located within the wound below the dressing material, the spray-in foam exposed to the negative pressure provided by the device, wherein the spray-in foam has an initial flowable state and a final set state wherein the spray-in foam automatically substantially conforms to a shape of the wound; and a plurality of vacuum lines extending between the device and the dressing material, wherein each of the plurality of vacuum lines is used to provide negative pressure to the wound sealably covered by the dressing material.
Overall, the claim coverage is centered on a negative-pressure wound therapy system where a sealable dressing contains an expandable spray-in foam that automatically substantially conforms to the wound shape when exposed to negative pressure, while negative pressure is delivered via a plurality of vacuum lines between the device and the dressing.
Stated Advantages
Improved manageability versus conventional large canister systems.
Comfort and effectiveness via a wound cover/drape with multiple holes and spacers to diffuse vacuum to the foam.
Reduction of pain via intelligent vacuum control algorithms.
Documented Applications
Negative pressure wound therapy applied by a portable/compact negative-pressure wound therapy system using a dressing with expandable spray-in foam and vacuum lines.
Wound treatment configurations that include wound monitoring/telemetry with sensors and infection indication via reagent color change.
Use of pressure sensing for clogging/healing indication in a negative-pressure wound therapy device.
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