Development of the PDF scale Create item pool To create items for the PDF scale, a post-dialysis interview was conducted in five maintenance hemodialysis patients with different severities. The item pool was collected using three anonymous questions. The first asked, "Are there any symptoms that develop after dialysis and then recover?" The second asked, "What exactly is that symptom?" The third question, which was asked while showing the patient a health card (basic life study, symptom list), was, "Are there any other applicable items?" Fourteen items were extracted by the interviews according to the advice of dialysis specialist groups in order to ensure the content validity. Based on the opinion of the specialist group (dialysis specialist, kidney physician, dialysis room nurse, clinical engineering technician) and with reference to previous studies, PDF was defined as "a subjective fatigue syndrome that specifically occurs for about half a day immediately after undergoing hemodialysis therapy." Construction of a new PDF scale We asked the patients about symptoms that they notice from the end of dialysis treatment until bedtime, as follows: (1) fatigue, (2) general malaise, (3) feeling exhausted and weak, (4) Lightheadedness, (5) needing to lie down and take a nap or rest, (6) difficulty moving without taking
Background: We evaluated the biocompatibility and small protein permeability of a newly developed hydrophilic-coated membrane dialyzer (NV) compared with conventional polysulfone dialyzer (APS) for hemodialysis (HD) therapy.
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