Leak-resistant bandage systems and methods with hydrophilic foam wound insert for fluid-instillation and/or negative-pressure wound therapies

摘要

Wound treatment systems and methods (e.g., having hydrophilic wound inserts), such as for negative-pressure and/or fluid-installation wound therapies. Some embodiments include a check-valve assembly between a wound dressing and a vacuum source.

主权项

1. A check-valve assembly for delivering negative pressure to a wound dressing, the check-valve assembly comprising:
a housing having
a first member including a first connection having a first lumen and a second annular lumen disposed around the first lumen, wherein the first and second lumens are adapted to be in fluid communication with the wound dressing,a second member including a second connection having a first lumen adapted to be in fluid communication with a vacuum source and a second annular lumen disposed around the first lumen and adapted to be in fluid communication with a pressure sensor for sensing negative pressure at the wound dressing,a first passageway between the first and second connections,a second passageway that is distinct from the first passageway and that forms a fluid connection between the second annular lumens of the first and second connections, a check valve disposed in the first passageway and configured to
permit fluid to pass through the check valve assembly from the first connection to the second connection if a pressure at the first lumen of the second connection is less than a pressure at the first lumen of the first connection; andsubstantially prevent fluid from passing through the check valve from the second connection to the first connection if the pressure at the first lumen of the second connection is greater than the pressure at the first lumen of the first connection.