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A Journal on Nephrology and Urology

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Minerva Urologica e Nefrologica 2016 Oct 05


language: English

The impact of nocturnal polyuria in older people with nocturnal LUTS

Ana L. LOPES MENDES 1, 2, Veerle DECALF 1, Marie A. DENYS 1, Andrea TUBARO 2, Karel EVERAERT 1

1 Department of Urology, Ghent University Hospital, Ghent, Belgium; 2 Department of Urology, Sant’Andrea University Hospital, Rome, Italy


BACKGROUND: Bladder dysfunctions often express the presence of lower urinary tract symptoms (LUTS) and are common in older people. Aim of this study is to analyse the Micturition, Incontinence and Residual in older people, evaluating the role of Nocturnal Polyuria.
METHODS: 86 patients with at least 65 years old and invalidating LUTS were hospitalized for 24 hours. The Maximum Bladder Capacity, mean Micturition Volume, Post Voiding Residual and Incontinence Volume were recorded and analysed day-time and night-time. Three groups were defined: Nocturia, Nocturnal Incontinence and Nocturnal Polyuria (NP) and patients with or without NP was analyzed.
RESULTS: With a majority of female patients 85% and a mean age of 74.3±5.96 years, a high incidence of Nocturia (76%) was observed. NP was associated with Nocturia in 56 patients (86%). In the three groups, the maximum bladder capacity and mean micturition volume were statistically higher during the night. Patients with Nocturia or Nocturnal Incontinence, associated to NP presented a higher Nocturnal Maximum Bladder Capacity and Mean Micturition Volume. A higher nocturnal PVR was observed in patients with Nocturnal Incontinence associated with NP (p=0.03). Patients without NP presented a significantly higher diurnal results.
CONCLUSIONS: Nocturnal LUTS in older people is the result of a high nocturnal urine production related to NP with a higher nocturnal bladder capacity. The analyses of micturition, incontinence and PVR, and the accurate evaluation of the presence or absence of NP seems to be the key point for a better therapeutic choice in patients suffering by Nocturnal LUTS.

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