Fluid Intake Management in Maintenance Hemodialysis Using a Smartphone-Based Application: A Pilot Study

Area of Science:

• Nephrology
• Digital Health
• Patient Self-Management

Background:

• Increased interdialytic weight gain (IDWG) is linked to higher morbidity and mortality in hemodialysis patients.
• Effective fluid management is crucial for patients undergoing maintenance hemodialysis.

Purpose of the Study:

• To evaluate the safety and usefulness of a smartphone application (FiApp) for self-monitoring daily fluid intake in hemodialysis patients.
• To assess the impact of app-guided fluid intake monitoring on IDWG.

Main Methods:

• A 4-week study involving patients on maintenance hemodialysis with baseline IDWG <4%.
• Participants used the FiApp to record fluid intake and compare it with personalized targets.
• Patient interviews were conducted to gather feedback on usability and recommendations.

Main Results:

• 61% of participants showed a decrease in IDWG while using the FiApp compared to baseline.
• The app was used on ≥80% of study days by 72% of participants.
• Only one patient experienced an IDWG increase >20% during the study period.

Conclusions:

• A smartphone-based app can be safely utilized by hemodialysis patients for tracking and controlling fluid intake.
• Motivated patients can achieve reduced IDWG with the aid of this digital monitoring tool.
• Patient feedback will inform future refinements of the FiApp for improved usability and effectiveness.