Negative pressure device having oxygen scavenger and volume reduction

Abstract

A negative pressure tissue treatment system useful for negative pressure therapy includes a drape, a gasket material, a reactor housing, a reactor, and any fluid connection(s). The drape covers the skin of a patient and maintains negative pressure under the drape. The gasket material cooperates with the drape to define an enclosed volume that is sealed by the gasket material. The reactor housing defines a closed chamber in fluid communication with the enclosed volume, and the reactor is disposed in the reactor housing. The reactor consumes oxygen from a system volume defined by the enclosed volume, closed chamber, and / or any fluid connection(s). As a result of the oxygen consumption, the system volume is reduced to between about 95% to about 80% of the initial system volume.

Description

Background technique [0001] Negative pressure wound therapy (NPWT for short) is an effective method to treat chronic wounds that are difficult to heal and reduce postoperative incision scar formation and infection. Commercially available systems employ an external electromechanical pump, power supply, and controller connected to the wound dressing by a hose. In many cases, negative pressures of 120mmHg and 80mmHg (internal pressures of 640mmHg and 680mmHg, respectively) are generally regarded as the preferred range. Using an electromechanical pump that requires a power source and a controller can add significant cost and affect the patient's lifestyle due to device size, weight, and noise. [0002] The use of chemical oxygen scavengers to create a negative pressure relative to atmosphere in a fixed volume system results in significant cost savings, requires no power, and allows silent operation. However, chemical oxygen scavengers naturally generate a negative pressure of 15...

AI Technical Summary

Problems solved by technology

Enclosed space limits system volume

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