Abstract: There is disclosed a method for rapidly and inexpensively determining the amount of recirculation in a patient undergoing a dialysis treatment comprising measuring temperature of an arterial limb and a venous limb of a dialysis access, decreasing temperature of blood being returned to the patient from about 0.5.degree. C. to about 30.degree. C. without adding volume, and measuring temperature of the arterial limb and the venous limb of the dialysis access to determine if there is a temperature drop in the arterial limb as evidence of recirculation.

Abstract: Dryers with a timed drying cycle of user selectable duration and a continuous drying cycle which is terminated only upon receipt of an input from the user of the dryer. An optional module allows the user to select the maximum temperature wanted in the dryer cabinet, the minimum temperature needed for effective drying is set at the factory. Control is exercised via a microprocessor over the heater and the fan of a heater/fan unit, a recirculating blower, and the blower of an optional HEPA filter assembly if that assembly is present.