title: Characteristics of circadian change in urinary frequency, bladder capacity and residual urine volume in elderly men with lower urinary tract symptoms.
abstract: In order to compare the daily voiding traits of elderly men with those of middle-aged men with lower urinary tract symptoms (LUTS), urinary frequency, bladder capacity at normal desire to void (CNDV), residual urine volume (RUV) and functional bladder capacity were evaluated at home during a 24 h period using a non-invasive method. The results showed that in both groups, urinary frequency was lowest from midnight to 06.00 h. The urinary frequency was the highest from 12.00 to 18.00 h. The CNDV in the elderly group was less than that of the middle-aged group for 1 day. In particular, bladder capacity from 24.00 to 06.00 h showed the greatest difference (P < 0.05). The RUV in elderly men tended to accumulate more than those in middle-aged men. The findings suggest that the functional bladder capacity of elderly men was lower than that of middle-aged men in the home.
authors.affiliation: Department of Nursing, School of Medicine, Yamagata University, Japan. wsato@med.id.yamagata-u.ac.jp
authors.forename: W
authors.initials: W
authors.lastname: Satoh
authors.forename: T
authors.initials: T
authors.lastname: Nakada
mesh_terms: D000367:Age Factors; D000368:Aged; D000375:Aging / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011470:Prostatic Hyperplasia / Q000145:classification / Q000000981:diagnostic imaging / Q000503:physiopathology*; D012720:Severity of Illness Index; D013997:Time Factors; D014463:Ultrasonography; D001743:Urinary Bladder / Q000503:physiopathology*; D014556:Urine / Q000502:physiology; D014563:Urodynamics / Q000502:physiology*