Importance

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Abstract

A pressure relief valve vent line mattress system utilizes a self-adjusting approach with a single air source to obtain in combination a low air loss feature for beneficial cooling and drying of a patient's skin. A single air supply source outputs a predetermined positive flow of air into one or more patient air support bladders. An air distribution manifold received within a mattress body receives and disperses overflow pressure routed thereto from the patient air support bladders via an air passageway having a first pressure relief valve with an established set point. A second pressure relief valve is associated with a pump return line adjunct to the constant air flow pump. The net effect is to disperse overflow pressure from the mattress bladders (tending to keep such bladders at a constant pressure) while providing low air loss through the mattress for patient cooling and drying effects, all utilizing a single air flow source.

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First Claim