Abstract Background and Aims Recently, more elderly patients who are independent or able to live at home with support of family are opting for peritoneal dialysis (PD). And assisted PD becomes the useful cure in the super-aging society. Japanese nursing-care insurance system which began in 2000 is useful for the spread of PD in the elderly. A purpose of this study is to check the current situation of the PD therapy in the elderly needing care. And it is to plan the spread of assisted PD in the elderly patients. Method Of the 789 elderly patients controlled by dialysis at our hospital between 2000 and 2018, 265 patients (33.6%) selected PD. 106 patients (30.1%) of young-old group (65-74 years, n=352), 108 patients (32.6%) of old group (75-84 years, n=331), and 51 patients (48.1%) of oldest old (โง85 years, n=106) started PD. We studied total Kt/V, total Ccr, volume of urine, volume of dialysate, the bag exchange number and dialysate retention time in 90 PD patients. We estimated total Kt/V and relations of the nursing care level in elderly PD patients. The data of patients divided into 4 groups: young group (โฆ64 years, n=30), young-old group (65-74 years, n=19), old group (75-84 years, n=27) and oldest-old group (โง85 years, n=14). Total Kt/V and relations of the nursing care level between 1 and 5 based on assessment of care requirements in PD patients with or without assisted PD were studied. Results The nursing-care insurance acquisition rate of each age group was 3.3%, 18.8%, 51.9%, 78.6% and assisted PD rate was 0%, 21.1%, 55.6%, 92.9%, respectively. Total urine volume was 759ยฑ506 L/day in the independent elderly patients and was 603ยฑ433 in the elderly patients with assisted PD. Dialysate volume was 5.5ยฑ2.0L/day in the independent elderly patients and was 4.0ยฑ2.1 in the elderly patients with assisted PD (p<0.05). The daily bag exchange number of times was 3.6ยฑ1.0 in the independent elderly patients and was 2.9ยฑ1.1 in the elderly patients with assisted PD (p<0.05). The volume of dialysate was 5.5 ยฑ2.0 L/day in the independent elderly patients and was 4.0ยฑ2.1 L/day in the elderly patients with assisted PD (p<0.05). Though total Kt/V did not have the difference in each age group, total Kt/V was 1.74ยฑ0.36 in the non-need of nursing care elderly patients and was 1.37ยฑ0.30 (p <0.05) in the need of nursing care elderly patients. Total Kt/V was 1.72ยฑ0.30 in the independent elderly PD patients and was 1.53ยฑ0.44 in the elderly patients with assisted PD. Total Kt/V and the nursing care level were significantly inversely correlated (p = 0.011). Total Kt/V and the life independence degree of patients with dementia were significantly inversely correlated (p = 0.001) Conclusion Elderly PD patients can achieve improved levels of well-being with low volume peritoneal dialysates. The application of dialysis prescriptions using APD and and/or icodextorin decrease the burden of changing PD bags for elderly patients, nurses and families who support them (assisted PD). PD for elderly patients will create a paradigm shift of dialysis therapy in the super aging society.
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