Patent ID: 11883261
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 34:
35. A system for treating a tissue site, comprising:
a dressing, comprising:
a sealing member configured to cover the tissue site and to provide a sealed space between the sealing member and the tissue site,
an absorbent configured to be positioned in the sealed space and between the tissue site and the sealing member,
an inlet port configured to be in fluid communication with the sealed space,
a vent configured to be in fluid communication between the sealed space and an atmosphere exterior to the sealed space,
a transformable plug comprising a soluble material and being configured to change from a serviceable state in which the transformable plug is fluid impermeable to a deteriorated state in which the transformable plug is fluid permeable in response to a liquid saturation level of the absorbent, the transformable plug configured to preclude fluid communication through the vent in the serviceable state and to permit fluid communication through the vent in the deteriorated state, and
at least one hydrophobic filter enclosing the transformable plug, the at least one hydrophobic filter being vapor permeable and liquid impermeable; and

a reduced pressure source configured to be coupled in fluid communication with the dressing through the inlet port.