Negative pressure wound treatment device, and methods
Inventors
Anderson, Paul J. • Duchon, Douglas
Assignees
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Publication Number
US-9839727-B2
Publication Date
2017-12-12
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 managable 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 system for applying negative pressure on a wound with a device configured to be mounted on a person. The device includes a housing with a pump configured to provide negative pressure on the wound via a first vacuum line, an instrument panel on a top surface, and a concave portion contoured to fit a person's torso. The device weighs no more than about 3 lbs.
The wound is sealably covered by dressing material, and the first vacuum line extends between the housing and the dressing material to provide negative pressure to the wound sealingly covered by the dressing material. The system further includes a flexible container connected to the housing for storing extrudate obtained by the applied pressure on the wound.
An expandable foam is located within the wound below the dressing material and is exposed to the negative pressure provided by the device. The expandable foam is configured to conform to a shape of the wound and is configured to set after exposure to an environmental condition, including at least one of light and air, or provided by a curing source. The dressing material can include a top layer and a bottom layer facing the wound, where the bottom layer is configured to diffuse the negative pressure applied to the wound.
Claims Coverage
The document includes three independent claims that share a common negative-pressure wound therapy system architecture, with inventive features centered on a person-mounted negative-pressure device, a sealably covering dressing material with vacuum-line coupling, extrudate storage in a flexible container, and expandable foam located within the wound that sets after exposure to an environmental condition. The independent claims further partition inventive scope by introducing a weight constraint, a device volume constraint, and diffusion of negative pressure through a dressing bottom layer.
Wearable negative-pressure wound therapy device with concave torso-shaped housing
A device including a housing configured to be mounted on a person, the housing including a pump configured to provide negative pressure on the wound via a first vacuum line, and wherein the device includes an instrument panel on the top surface and a concave portion contoured to fit a person's torso.
Negative pressure applied through vacuum line to sealably covered wound
A dressing material sealably covering the wound, the first vacuum line extending between the housing and the dressing material to provide negative pressure to the wound sealingly covered by the dressing material.
Flexible extrudate storage container connected to the device
A flexible container connected to the housing of the device for storing extrudate obtained by the applied pressure on the wound.
Expandable foam within wound that sets after environmental exposure
An expandable foam located within the wound below the dressing material, the expandable foam exposed to the negative pressure provided by the device, wherein the expandable foam is configured to set after exposure to an environmental condition.
Foam configured to conform to wound shape
An expandable foam configured to conform to a shape of the wound.
Device weight constraint
A device configured such that the device weighs no more than about 3 lbs.
Device housing volume constraint
A housing of the device having a volume of no more than about 125 in^3.
Dressing bottom layer configured to diffuse negative pressure
A dressing material including a top layer and a bottom layer facing the wound, wherein the bottom layer is configured to diffuse the negative pressure applied to the wound.
Across the independent claims, the system applies negative pressure to a wound via a wearable housing pump and a first vacuum line coupled to sealably covering dressing material, stores extrudate in a flexible container connected to the housing, and uses expandable foam located within the wound below the dressing material that sets after exposure to an environmental condition. Claim scope is further refined by constraints on device weight, device housing volume, foam conformance to the wound shape, and diffusion of negative pressure through a dressing bottom layer.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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