A small pilot study to evaluate the accuracy and feasibility of a novel automated voiding diary device for recording urine output measurements.

AIMS

Recording a voiding diary can be bothersome for patients and is sometimes inaccurate and unhygienic. This study aimed to develop and assess the accuracy and convenience of a novel device that automatically records the voiding diary by measuring pre- and post-void body weight.

METHODS

We used this novel device for seven healthy volunteers and ten hospitalized patients. The examinees got on the device before and after voiding and the device recorded the voiding diary automatically. The examinees also manually recorded a voiding diary by collecting their urine in a cup and measuring its volume and weight. We examined the correlation between the traditional and the automated voiding diary to confirm the accuracy of voiding measurements using this device. Additionally, we investigated which measurement method was preferred by the participants.

RESULTS

In the healthy volunteers group, there was a strong correlation between the voided urine weight recorded by the device and voided urine weight measured manually by the examinee (R  = 0.9935). In the patients group, there was a strong (R  = 0.9117) but lower correlation than that of the volunteers group, with an error of ±25 g 62% of the time, and ±50 g 82% of the time, respectively. All of the healthy volunteers and seven of the ten patients preferred using the automated voiding diary.

CONCLUSIONS

This novel device recorded a reasonably accurate voiding diary for everyday clinical practice.