Assemblies, systems, and methods for vacuum assisted internal drainage during wound healing
Inventors
Bengtson, Bradley P • McGuire, Patricia A
Assignees
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Publication Number
US-8585683-B2
Publication Date
2013-11-19
Expiration Date
Abstract
Assemblies, systems, and methods convey fluid from an internal wound site or body cavity by applying negative pressure from a source outside the internal wound site or body cavity through a wound drain assembly that is placed directly inside the internal wound site or body cavity.
Core Innovation
The invention addresses a wound defined by an interior dead space having a volume enclosed between interior tissue surfaces consisting of muscle, connective, or skin tissue beneath substantially intact skin. After surgery or trauma separates tissue and blood vessels, extracellular blood and serous fluid escaping from the blood vessels accumulate to form a seroma. The described approach creates percutaneous access into the wound to reach this interior dead space while maintaining substantially intact skin over the operative site.
A wound closure device is provided for placement entirely within the interior dead space. The device includes a perforated housing and tubing coupled to the wound drainage structure, where the tubing is sized and configured to be coupled to a source of negative pressure outside the body to convey negative pressure for internal application into the interior dead space. The perforated housing conveys extracellular blood and serous fluid from the interior dead space, drawing together the separated interior tissue surfaces to promote adherence and closure of the dead space during a wound healing process.
The invention further includes operating the source of negative pressure to convey negative pressure at 125 to 200 mmHg below ambient pressure into the wound closure device for internal application into the interior dead space. In response to the applied negative pressure, extracellular blood and serous fluid are conveyed through the perforated housing to promote adherence and closure of the dead space. The device configuration is adapted for external negative pressure source coupling and can also be implemented with a portable, battery powered source carried by the individual while ambulate.
Claims Coverage
The partial content includes two independent claims. The claims center on percutaneous access into an interior dead space beneath substantially intact skin and internal placement of a perforated wound closure device coupled to negative pressure at 125 to 200 mmHg below ambient, with one claim further specifying a portable battery-powered negative pressure source.
Percutaneous access to interior dead space beneath substantially intact skin for seroma management
Creating percutaneous access into a wound defined by an interior dead space enclosed between interior tissue surfaces consisting of muscle, connective, or skin tissue beneath substantially intact skin, where extracellular blood and serous fluid can accumulate to form a seroma.
Internal wound closure device with perforated housing and externally conveyed negative pressure
Providing a wound closure device comprising a perforated housing sized and configured for placement entirely within the interior dead space, and tubing coupled to the wound drainage structure, where the tubing is sized and configured to be coupled to a source of negative pressure outside the body to convey negative pressure internally into the interior dead space, and placing the wound drainage structure within the interior dead space.
Negative pressure delivery at 125 to 200 mmHg below ambient to draw tissue surfaces together
Extending the tubing from the interior dead space through the percutaneous access, coupling the tubing to a source of negative pressure outside the body, operating the source of negative pressure to convey negative pressure at 125 to 200 mmHg below ambient into the wound closure device for internal application into the interior dead space, and in response to the applied negative pressure conveying extracellular blood and serous fluid through the perforated housing to draw together the separated interior tissue surfaces to promote adherence of the tissue surfaces and closure of the dead space during a wound healing process.
Battery-powered portable negative pressure carried during ambulate
Providing a portable source of negative pressure that is battery powered and can be carried by the individual, providing a wound drainage structure comprising tubing with a proximal region coupled to the portable source of negative pressure outside the body and a distal region having a perforated housing extending through a percutaneous access in substantially intact skin to a location within the interior dead space, coupling the proximal region to the portable source, placing the distal region through the percutaneous access, and operating the portable source at a negative pressure of 125 to 200 mmHg below ambient pressure while the individual ambulate and carries the portable source, thereby conveying extracorporeal blood and serous fluid through the perforated housing into the tubing and draw the separated interior tissue surfaces together to promote adherence and closure of the dead space.
Across both independent claims, the core claim coverage is directed to creating percutaneous access into an interior dead space beneath substantially intact skin, placing a wound closure device with a perforated housing entirely within that dead space, and conveying negative pressure at 125 to 200 mmHg below ambient through tubing delivered internally to draw together separated tissue surfaces for adherence and closure; one claim further specifies a battery-powered portable negative pressure source carried during ambulate.
Stated Advantages
Promotes adherence of separated tissue surfaces and closure of the dead space during a wound healing process.
Documented Applications
Negative-pressure wound drainage for a wound/seroma defined by an interior dead space beneath substantially intact skin, including use with a portable battery powered negative pressure source while the individual ambulate.
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