A high flux artificial kidney system, which permits control over ultrafiltration, has been developed and patients are now being treated with it at a large outpatient kidney center. The basic operating characteristics have been described and some preliminary clinical results mentioned. Characteristics of the Hospital Artificial Kidney System are: 1. Higher clearances for middle molecules than conventional systems; 2. Adequate clearances for small solutes such as urea; 3. Predictable control of ultrafiltration with discrepancies between actual weight loss and theoretical weight loss on the order of 0.7 to 1.3 ml/min, when the system is operated in the designated manner.
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