US 8,257,327 B2Granted

Wound cleansing apparatus with actives

AssigneeSmith & Nephew, Inc.

InventorsPatrick Lewis Blott, Bryan Greener, Edward Yerbury Hartwell, Tina Michelle Walker, Julian Lee-Webb, Derek Nicolini, Clare Green, Robin Paul Martin

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Abstract

An apparatus for cleansing and applying therapy or prophylaxis to wounds, in which irrigant fluid containing a physiologically active material from a reservoir connected to a conformable wound dressing and wound exudate from the dressing are recirculated by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing. The cleansing means (which may be a single-phase, e.g. microfiltration, system or a two-phase, e.g. dialytic system) removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The dressing and a method of treatment using the apparatus.

Claims24

Dependent claims

An apparatus for aspirating, irrigating and/or cleansing wounds, comprising:

a fluid flow path, comprising:
a conformable wound dressing, comprising a backing layer which is capable of forming a relatively fluid-tight seal or closure over a wound and a wound-facing face, at least one inlet lumen passing through and/or under the wound-facing face and in communication with at least a fluid reservoir, and at least one outlet lumen passing through and/or under the wound-facing face, wherein a relatively fluid-tight seal or closure is formed over the wound at the point at which each inlet lumen and each outlet lumen passes through and/or under the wound-facing face;
a means for fluid cleansing in communication at least with the outlet lumen comprising a two-phase system configured to remove materials deleterious to wound healing from fluid removed from the wound by bringing fluid removed from the wound into direct or indirect contact with a second fluid, wherein fluid removed from the wound and the second fluid are separated by an integer;
a fluid recirculation lumen for directing cleansed fluid from the means for fluid cleansing back into the inlet lumen;
a device for moving fluid through at least the wound dressing and the means for fluid cleansing;
means for supplying physiologically active agents to the wound.

3 more elements

A wound treatment apparatus, comprising:

a wound dressing comprising a backing layer configured to form a relatively fluid-tight seal around at least a portion of a wound;
an inlet lumen in fluid communication with the backing layer, the inlet lumen configured to provide a fluid conduit into the backing layer;
an outlet lumen in fluid communication with the backing layer, the outlet lumen configured to provide a fluid conduit out of the backing layer;
a fluid reservoir in fluid communication with the inlet lumen, the fluid reservoir configured to supply an irrigation fluid into the backing layer, wherein the fluid reservoir comprises physiologically active agents and/or an antimicrobial substance;
a pump configured to move fluid through the inlet lumen, the backing layer, and the outlet lumen;
and
a spiral shaped member configured to be positioned under the backing layer, the spiral shaped member configured to be positioned in contact with the wound bed when in use.

4 more elements

A wound treatment apparatus, comprising:

a wound dressing comprising a backing layer configured to form a relatively fluid-tight seal around at least a portion of a wound;
an inlet lumen in fluid communication with the backing layer, the inlet lumen configured to provide a fluid conduit into the backing layer;
an outlet lumen in fluid communication with the backing layer, the outlet lumen configured to provide a fluid conduit out of the backing layer;
a fluid reservoir in fluid communication with the inlet lumen, the fluid reservoir configured to supply an irrigation fluid into the backing layer, wherein the fluid reservoir comprises physiologically active agents and/or an antimicrobial substance;
a pump configured to move fluid through the inlet lumen, the backing layer, the outlet lumen;
a fluid cleansing mechanism in fluid communication with the outlet lumen, the fluid cleansing mechanism configured to remove materials deleterious to wound healing from fluid in the outlet lumen;
and
a recirculation lumen configured to recirculate fluid from the fluid cleansing mechanism back into the inlet pipe without passing through the fluid reservoir, wherein the fluid recirculation lumen comprises a bleed device configured to bleed fluid from the recirculation lumen to relieve pressure in at least a portion of the apparatus.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/576,263Filed 28 Oct 2004
Priority: GB 0325120.428 Oct 2003
Published: US 2007/0141128 A121 Jun 2007
Granted: 4 Sep 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

A61M 3/0229
Enemata; Irrigators: devices operating in a closed circuit, i.e. recycling the irrigating fluid
A61M 1/915
Suction aspects of the dressing: constructional details of the pressure distribution manifold
A61M 1/92
Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing: with…
A61M 35/30
Devices for applying media, e.g. remedies, on the human body: gas therapy for therapeutic treatment of the skin