Fluid Intake Application to Reduce Kidney Stone Risks

Study Overview
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Brief Summary
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The purpose of this investigation is to prospectively evaluate the benefit of different methods of educating patients regarding their fluid intake through a readily available daily cellular phone application to improve overall urine output and reduce risk factors for stone recurrence.

Detailed Description
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The prevalence of kidney stone disease in the United States is increasing. Recurrence of kidney stone disease has been reported as high as 50% at five years. Urine supersaturation is a predominant factor in the formation of crystallization and stone disease and is dependent on fluid volume. High fluid consumption that dilutes the urine has been shown both in vitro and in clinical studies to reduce the tendency for stone crystallization as well as effectively decrease stone recurrence. As a result, water intake greater than two liters per day is a common initial therapy for prevention of stone disease. However, studies have shown that despite physician counseling most patients are only able to modestly increase their urine volume through fluid intake. This finding may be due to a discrepancy in patient perception of their actual fluid intake and resulting urine volume. The purpose of this investigation is to prospectively evaluate the benefit of different methods of educating patient regarding their fluid intake through a readily available daily cellular phone application to improve overall urine output and reduce risk factors for stone recurrence.

Official Title
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Do Different Methods of Educating Patients Regarding Fluid Intake Reduce Kidney Stone Risks?

Conditions
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Kidney Stone

Intervention / Treatment
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* Behavioral: iPhone Application
* Behavioral: Android Application


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients ≥ 18 years old Seen in urology or nephrology clinic at UNC with a diagnosis of kidney stone Prior 24-hour urine result with volume less than 2 to 2.5 liters Exclusion Criteria: Patient without cellular phone capable of utilizing Android / Apple application Patient already using some form of monitoring fluid intake / volume Inability to take fluid by mouth Patient with urinary diversion, chronic diarrhea, bowel diversion or other forms of excessive fluid loss Inability to obtain informed consent Non-English speaking

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| iPhone Application<br>Participants using an iPhone will download the waterlogged application and use this to track daily water intake for 1 week. | Behavioral: iPhone Application<br>* The iPhone application waterlogged will be used by participants using and iPhone cellular device. This application will be used to track daily fluid intake for 1 week.<br>|
| Android Application<br>Participants using an Android cell phone will download the water your body application and use this to track daily water intake for 1 week. | Behavioral: Android Application<br>* The Android application water my body will be used by participants using an Android cellular device. This application will be used to track daily fluid intake for 1 week.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 24-hour urine volume |  | 7-10 days from baseline | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Actual 24-hour urine volume vs. patient perceived urine volume |  | 7-10 days from baseline | 
| Ease and interest in monitoring fluid intake based on survey data |  | 7-10 days from baseline |