Controlled negative pressure apparatus and alarm mechanism

摘要

Methods and devices for treatment of damaged tissue are disclosed, including treatment of wounds by employing non-electrically powered, reduced pressure therapy devices. The devices are capable of generating a substantially constant reduced pressure with low tolerance for pressure fluctuations. Also disclosed herein are reduced pressure therapy systems that comprise an alarm system to detect the depleted state of the suction device and provide an alert to the patient and/or practitioner.

主权项

1. A reduced pressure therapy system, comprising:
a suction device comprising a suction chamber with an inlet opening and a slidable seal therein, wherein the slidable seal is to generate a reduced pressure in the suction chamber; an expandable fluid absorbent material located within the suction chamber having a first and second state, wherein the material in the first state is a dry solid and the material in the second state is a semi-solid or gel; and a screen configured to block displacement of the expandable fluid absorbent material out of the suction device; wherein the expandable fluid absorbent material, prior to any fluid absorption, is retained by a carrier structure within the suction at a fixed location around the inlet opening of the suction chamber that is independent of suction device orientation but wherein the expandable fluid absorbent material is configured to separate during use from the carrier structure with fluid absorption such that material is at least partially movable in the suction chamber.