PATIENT COOLING SYSTEM RESPONSIVE TO HEAD ELEVATION

A patient support structure includes a cushion layer. A microclimate structure is integrated atop the cushion layer. The microclimate structure includes an upper layer having a vapor and liquid permeable therapeutic region, an air permeable middle layer, and a liquid impermeable lower layer. A first plurality of perforations extends through the upper layer of the microclimate structure in a seat section of the microclimate structure. A second plurality of perforations extends through the upper layer of the microclimate structure in a head section of the microclimate structure. When the microclimate structure is in a first position, air is supplied through the first plurality of perforations and the second plurality of perforations. When the microclimate structure is in a second position, air is supplied through the first plurality of perforations and air flow through the second plurality of perforations is limited.