Bladder diary is a crucial way to assess lower urinary function. On the other hand, urinary salt is investigated to control intake of salt to improve blood pressure, because urinary salt is regarded as equivalent to urinary sodium due to urinary sodium is the major electrolyte in urine. In this study, we observed three cases of bladder diary together with urinary salt measurement in healthy adults.

We recruited 2  healthy female and 1 male healthy male. We asked them to measure urinary salt each micturition during bladder diary recording in three days using urinary salt meter (EN-905RIV, Kawaguchi, Doritec. Inc) by electric conduction method. The amount of urinary salt was calculated urinary volume and percentage of urinary salt.

In these cases, the average of voided volume was mean 164.7±81.9, 245.6±103.7, 244.5±29.5mL, respectively. The percentage of urinary salt each micturition was mean1.35±0.37, 1.42±0.58, 1.06±0.35%, respectively. The amount of urinary salt each micturition was mean 2.07±0.85, 3.45±1.88, 2.54±0.73g, respectively. The amount of urinary salt each a day was mean 11.7±2.96, 10.4±2.51, 9.31±2.19g, respectively. Two female healthy women were observed the correlation of urinary salt and voided volume each micturition, one male was not detected the one.

In this study of three healthy adults, we performed bladder diary and urinary salt measurement together.
Recorded bladder diary together with urinary salt measurement, we could obtain conventional bladder diary and percentage/ amount of urinary salt of each micturition. Estimated urinary sodium per a day can be obtained without storing urines in a day, which urinary salt is regarded as equivalent to urinary sodium due to urinary sodium is the major electrolyte in urine. In addition, the condition of diuresis of each person might be obtained by comparing urinary voided volume and urinary salt from bladder diary with urinary salt measurement.

This study showed that bladder diary together with urinary salt measurement in healthy adults. These results suggested that conventional bladder diary with urinary salt measurement might be more beneficial to evaluate lower urinary function because of estimated urinary sodium per day without storing urines in a day and the estimated condition of diuresis each person.