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To predict the drying rates of wetted nylon and expanded polystyrene (EPS) particles in an air-fluidized bed, three theoretical methods from literature were used to model the constantrate drying period while the falling-rate period was modelled using the characteristic drying curve method.
Patients were excluded from the study if they were febrile or septic or otherwise required immediate hospitalization, since such patients would incur costs even before the air-fluidized bed therapy was provided.
In each of three major metropolitan areas, a nurse who was an expert at using air-fluidized bed therapy served as the study's home care coordinator (HCC).
For air-fluidized bed therapy patients, the HCCs conducted a home visit weekly for the first 4 weeks, and then biweekly for as long as the patient remained on the air-fluidized bed.
Virtually all patients in both the home air-fluidized bed therapy group and the control group had most or wet-to-dry dressings.
Group 1, for patients at-risk, includes alternative pressure pads, foam replacements and air overlays; Group 2, for stage 2 pressure sores and higher, includes low air loss mattress replacements, low air loss overlays and beds, and alternating (or turning) mattresses; and Group 3, for the most severely disabled or contracted patients, includes air-fluidized beds. Groups 2 and 3 are considered ancillaries and are therefore fully reimbursable; Group 1 products are subject to routine cost limits.