A method of treating tissue damage comprises applying a negative pressure to a wound sufficient in time and magnitude to promote tissue migration and thus facilitate closure of the wound. The method is applicable to wounds, burns, infected wounds, and live tissue attachments. A wound treatment apparatus is provided in which a fluid impermeable wound cover is sealed over a wound site. A screen in the form of an open-cell foam screen or a rigid porous screen is placed beneath the wound cover over the wound. A vacuum pump supplies suction within the wound cover over the treatment site.

Wound treatment employing reduced pressure

A wound dressing includes a cover membrane comprising a semi-permeable material with an adhesive-coated skin contact surface. An opening is formed in an interior portion of the membrane. An intermediate layer of material may be placed between the wound and the membrane contact surface for either absorbing fluids from the wound, e.g. with a hydrocolloid or hydrophilic material, or for passing such fluids to the opening with a synthetic material, e.g. rayon. A tube includes a proximate end fluidically communicating with the wound through the membrane opening. A distal end of the tube is adapted for connection to a suction source for draining the wound or fluid source for introducing liquid medication to the wound. Both evacuation and introduction can be either active or passive. A wound treatment method is also disclosed.

Wound dressing and treatment method

The invention disclosed is a method of treating tissue damage comprising applying a negative pressure to a wound sufficient in time and magnitude to promote tissue migration and thus facilitate closure of the wound. The method is applicable to wounds, burns, infected wounds, and live tissue attachments. Configurations of apparatus for carrying out the method are also disclosed.

Method of treating tissue damage and apparatus for same

A bandage has a first sheet overlying a wound and located adjacent to it and a top sheet overlying the first sheet. The first sheet has a plurality of discrete passageways overlying the wound and adapted to communicate negative pressure established by a negative pressure source to the wound.

Wound treatment apparatus

A patient interface system includes a fluid transfer subsystem comprising a primary fluid transfer element fluidically communicating with the wound and a secondary fluid transfer element/manifold in contact therewith. A drape subsystem covers the fluid transfer elements and includes a film material membrane. A fluid conveying subsystem includes a vacuum source connected to the secondary fluid transfer element/manifold by a suction tube for creating a negative, sub-atmospheric pressure within the interface system for extracting fluids collected in the interface system. A fluid supply is provided for supplying various types of fluids to the interface system.

Medical patient fluid management interface system and method

A suction drainage device is disclosed which comprises a receptacle communicated with a body cavity via an inlet tube. The receptacle is formed as a bellows, flat receptacle, foil or sheet bag, or foil or sheet tube and the like which can be folded or rolled up. A flexible check valve in the form of a foil or sheet valve, or flutter valve, is disposed inside the receptacle. The inlet tube is provided on a side of one edge of the receptacle so that the receptacle can be rolled up over a long roll path without interference from the valve. The device can be manufactured at low cost.

Rolled flexible medical suction drainage device

A device for suction drainage consists of a container (612) communicating with a secretion forming body cavity via a supply hose (11) connected and being characterized in that the container (12) is formed as zusammenrollbarer bellows, flat container film bag or tubular film, and is that the non-return valve formed as a film valve (flutter valve 10) and disposed within the container (12). The supply hose (11) is arranged on one side of an edge (13) of the container (12), so that the container (12) can be rolled over a long winding path, without the valve (10) interferes with it. The device can be manufactured inexpensively.

Roland-Yves Jacques Leclerc

Papers

Rolled flexible medical suction drainage device

Medical suction drainage device