Assemblies, systems, and methods for vacuum assisted internal drainage during wound healing
Inventors
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-9814808-B2
Publication Date
2017-11-14
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 relates to a vacuum-assisted internal wound drainage system that includes a wound drain assembly with a housing enclosing an open interior, the housing being sized and configured for placement within a wound site or a body cavity. The housing includes perforations communicating with the open interior, where the perforations are configured to have a closed configuration and an open configuration, and an open cell component carried within the open interior to take in fluid from the wound site or the body cavity.
Tubing is coupled to the open interior and extends outside the wound site or the body cavity, where the tubing is sized and configured to be coupled to a source of negative pressure to convey fluid taken in by the open cell component. The invention further includes a tubular sleeve having a tissue penetrating distal tip for accessing the wound site or the body cavity, where an interior bore accommodates passage of the wound drain assembly.
The method accesses the wound site or the body cavity with the tubular sleeve and passes the wound drain assembly into the wound site or the body cavity through the tubular sleeve. In this way, separated internal tissue surfaces in the wound site/body cavity are drawn together, and interior dead space is addressed.
The system is described with mutually sizing concepts and configurations intended to reduce seroma by draining wound exudate and extracellular exudates from an interior dead space. The document describes multiple system variants including serial and parallel spaced-apart multi-housing arrays, absorbable drain versions, reservoir configurations, and an ambulatory portable vacuum configuration.
Claims Coverage
The partial content includes two independent claims directed to methods, with three inventive features repeated across the claims and related dependent material. The claims center on a housing with perforations having a closed configuration and an open configuration, an open cell component, and tubing coupled to a source of negative pressure, with one claim additionally using a tubular sleeve for delivery into the wound site or body cavity.
Negative-pressure drainage with switchable perforations and open-cell uptake
A method comprising providing a wound drain assembly comprising a housing enclosing an open interior, perforations in the housing communicating with the open interior configured to have a closed configuration and an open configuration, an open cell component carried within the open interior to take in fluid from the wound site or the body cavity, and tubing coupled to the open interior configured to be coupled to a source of negative pressure to convey fluid taken in by the open cell component from the wound site or the body cavity.
Transluminal placement using a tubular sleeve
A method comprising providing a tubular sleeve having a tissue penetrating distal tip for accessing the wound site or the body cavity and an interior bore sized and configured to accommodate passage of the wound drain assembly into the wound site or the body cavity, accessing the wound site or the body cavity with the tubular sleeve, and passing the wound drain assembly into the wound site or the body cavity through the tubular sleeve.
Accessing the wound site or the body cavity with the wound drain assembly
A method comprising providing a wound drain assembly, the wound drain assembly comprising a housing enclosing an open interior, perforations in the housing communicating with the open interior configured to have a closed configuration and an open configuration, an open cell component carried within the open interior to take in fluid from a wound site or a body cavity, and tubing coupled to the housing configured to be coupled to a source of negative pressure; and accessing the wound site or the body cavity with the wound drain assembly.
Across the independent claims in the provided partial content, the claim coverage centers on draining a wound site or body cavity using a housing with perforations having closed and open configurations, an open cell component that takes in fluid, and tubing coupled to a source of negative pressure. One independent claim additionally defines delivery of the assembly using a tubular sleeve with a tissue penetrating distal tip and an interior bore, while the other independent claim defines accessing the wound site or body cavity with the wound drain assembly.
Stated Advantages
Reduces seroma formation.
Draws together separated interior tissue surfaces to promote adherence and normal wound healing process.
Reduces interior dead space.
Faster and/or greater exudate removal is described in a porcine model comparison.
Quicker transition of collected fluid from bloody to straw-colored fluid is described.
Complete closure of the surgical space is described.
Minimal adherence and/or departiculation/fragmentation of the open cell material compared to a conventional Blake drain is described.
Documented Applications
Vacuum-assisted internal wound drainage within a wound site or a body cavity, using a negative-pressure source coupled to an internal housing with perforations and an open cell component, is described.
Serial and spaced-apart multi-housing drainage configurations for delivering multiple housings into a wound site or body cavity are described.
Parallel branched multi-housing drainage configurations are described.
Absorbable drain versions are described.
Reservoir configurations are described.
An ambulatory portable vacuum configuration is described.
Wound-morphology-based determination and selection of an appropriately sized wound drain assembly for draining extracellular exudates from an interior dead space are described.
In vivo porcine model comparison is described for internal wound/exudate drainage and outcomes versus a conventional Blake drain.
Interested in licensing this patent?