Negative pressure wound therapy canisters
AssigneeSmith & Nephew, Inc.
InventorsLars Runquist, Evan Leingang, Richard A. Thompson, Thom Tedham
Life of this patent
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Abstract
Embodiments of a canister for a negative pressure wound therapy systems and methods for operating the systems are disclosed. In some embodiments, the canister includes a receptacle for receiving wound exudate. A filter stack is interposed between the receptacle and the pump assembly and provides a fluid flow path therebetween. The flow path is more easily navigable by gas than by liquid, thereby allowing the pump assembly to apply a negative pressure to the canister without aspirating wound exudate into filters housed within the filter stack.
Claims20
A canister for a negative pressure wound therapy apparatus comprising:
- a receptacle in fluid communication with a dressing covering a wound, the receptacle being configured to receive an exudate from the wound;
- a connector in fluid communication with a pump assembly;
- and
- a filter assembly disposed between the receptacle and the connector and defining a flow path therebetween, the filter assembly comprising:
- a central portion extending longitudinally away from a peripheral portion, the central portion having a lateral wall and a base, at least a portion of the lateral wall connecting the base to the peripheral portion;
- a barrier extending from a connector-side surface of the base;
- an entrance disposed on a radially outward surface of the lateral wall, wherein at least a portion of the entrance faces the barrier;
- and
- an overhang extending from the barrier, the overhang being longitudinally spaced apart from and transversely overlapping with at least a part of the base.
-38. (canceled)
A canister for a negative pressure wound therapy apparatus comprising:
- a receptacle in fluid communication with a dressing covering a wound, the receptacle being configured to receive an exudate from the wound;
- a connector in fluid communication with a pump assembly;
- and
- a filter assembly disposed between the receptacle and the connector and defining a flow path therebetween, the filter assembly comprising:
- a central portion comprising a longitudinal wall, a shelf, and an inner rim, the inner rim circumferentially surrounding a central opening and being connected to the longitudinal wall by the shelf;
- a guard attached to a canister side surface of the shelf and extending radially across the central opening.
Dependencies are inferred from the claim text.