Patent ID: 8858516
Filing Date: 2014-10-14
Classification: A61M

Abstract:
1. A reduced pressure therapy system, comprising: an alarm device configured to retain the suction device, wherein the alarm device comprises a housing and at least one sensor; a suction device comprising a suction chamber with an inlet opening, an alignment protrusion, a plunger, and a slidable seal therein and configured to generate reduced pressure in the suction chamber as the seal slides within the suction chamber from a charged position to a depleted position, wherein in the charged position the suction device is able to generate negative pressure, and in the depleted position the suction device is no longer able to generate negative pressure; a wound dressing separate from the alarm device and suction device; a hydration-expandable, fluid absorbent material having a first and second state, wherein the hydration-expandable fluid absorbent material is a dry solid in the first state and is a semi-solid or gel in the second state and is retained by a carrier structure located within the suction chamber but separable from the carrier structure upon hydration expansion, and wherein the carrier structure is located directly adjacent to the inlet of the suction chamber; and a screen configured to block displacement of the expandable fluid absorbent material out of the suction device, wherein the alarm device is configured to separably and replaceably retain the suction device, and wherein the sensor is configured to detect when the slidable seal is in the depleted position based on its position relative to the alignment protrusion, regardless of the orientation of the suction device as it is retained by the alarm device.