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VesiscanClinicalAndroid/USER_GUIDE.md
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dw.jang 5d687f7154 docs: add USER_GUIDE.md — 사용자용 상세 가이드 
전체 사용 흐름 (연결→정렬→측정→배뇨기록) 단계별 안내
Placement 3-step 절차, Auto/Spot 측정, 설정, 트러블슈팅 포함

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-05-11 09:12:23 +09:00

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VesiScan-Basic User Guide

App Version: VBTAND0101

1. Getting Started

First Launch

  1. Install the app and open it
  2. Complete the onboarding screens
  3. Register your information (name, age, height, weight)
  4. Set a 4-digit PIN
  5. You will arrive at the Home screen

Home Screen

  • Tap Start to begin
  • The app version is displayed below "Smart Bladder Monitoring"
  • To enable Developer Mode: tap the Bladdy character 3 times quickly (within 1.5 seconds)

2. Connecting the Device

  1. Tap Start on the Home screen
  2. The app will scan for nearby VesiScan devices
  3. When your device appears in the list, tap it to connect
  4. Complete the Bluetooth pairing when the system dialog appears
    • Do NOT press Cancel — the app will not proceed without pairing
  5. Once paired, you will move to the Personalization screen

Personalization

  • Set your posture (standing/sitting/lying)
  • Set the sensor position
  • Set the Max Volume (default: 500 mL)
  • Tap Next to proceed to Sensor Alignment

3. Sensor Alignment (Placement)

This step ensures the sensor is positioned correctly over your bladder for accurate measurement.

Step 1: Vertical Alignment

  1. Place the VesiScan-Basic device just above your pubic bone
  2. Apply ultrasound gel between the sensor and your skin
  3. Tap the Start Alignment button
  4. The app will begin scanning and provide direction:
    • "Raise the sensor up" — slide the device upward toward your navel
    • "Lower the sensor down" — slide the device downward toward your pubic bone
    • "Raise the sensor slightly" / "Lower the sensor slightly" — make small adjustments
  5. Move the sensor slowly, 1-2mm at a time
  6. When the vertical position is correct, the app will show Step 2/3

The hint text will show animated dots (e.g., "Raise the sensor up.", "Raise the sensor up..", "Raise the sensor up...") to indicate the system is actively scanning.

Step 2: Lateral Alignment

  1. The app will first show "Checking left/right balance..." for a few seconds
  2. Then it will guide you:
    • "Move left" — slide the device to the left
    • "Move right" — slide the device to the right
  3. Adjust until both lateral sensors (CH4 and CH5) detect the bladder equally
  4. When balanced, the app will show Step 3/3

Step 3: Final Check (Green Zone)

  1. The app checks overall alignment quality
  2. If everything is optimal, the hint will show "Optimal position!"
  3. The screen will hold this state for 7 seconds to confirm stability
  4. Tap Alignment Complete to proceed to the measurement screen

If Alignment is Lost

  • If the sensor shifts significantly after reaching Optimal:
    • The app will show "Position lost. Place sensor above pubic bone, then press Start"
    • The scanning will stop automatically
    • Re-place the sensor and tap Start Alignment again

If the Sensor is Detached

  • If the sensor loses contact with skin:
    • The app will show "Sensor detached. Place above pubic bone, then press Start"
    • Re-attach the sensor with gel and tap Start Alignment

Tips

  • Use plenty of ultrasound gel — dry contact causes poor readings
  • Keep the sensor flat against the skin — tilting reduces accuracy
  • Move slowly — fast movements cause unstable readings
  • You can tap Skip to go directly to measurement without alignment

4. Measurement Screen

After alignment, you will see the main measurement screen with a donut chart.

Screen Layout

  [Placement]  [Battery]  [Catheters]  [Settings]
  
            Enjoy your day!
            
         ┌─────────────────┐
         │    Donut Chart   │
         │                  │
         │     [Bladdy]     │
         │    325 mL        │
         └─────────────────┘
         
   Current Measurement    |     65%
        280 mL            |   325/500 mL
        
   [Void/Catheterize] [Auto] [Spot]

Understanding the Display

Element Description
Donut Chart Fills based on max measured volume / max volume setting
Center Value Maximum measured volume this session (updates every 5 seconds)
Current Measurement Latest trimmed mean value (Auto) or last Spot result
Fill Card Top: fill percentage, Bottom: max measured / bladder max volume
Battery Icon Device battery level with visual indicator
Catheter Count Remaining catheters (tap to add more)

5. Auto Measurement

  1. Tap the Auto button (orange)
  2. The device will measure continuously every ~1.5 seconds
  3. For the first 5 measurements, the display will show "—" (collecting data)
  4. After 5+ measurements, the trimmed mean value will be displayed
  5. The donut chart will update every 5 seconds
  6. Tap Stop (red) to end Auto measurement

Auto Measurement Failure

  • If measurements fail 5 times in a row (sensor shifted or lost contact):
    • A dialog will appear: "Sensor Position Issue"
    • Tap Go to Alignment to re-align the sensor
    • Or tap Dismiss to stay on the measurement screen

6. Spot Measurement

  1. Tap the Spot button
  2. The device will take 5 consecutive measurements (~4 seconds total)
  3. A spinner will show during measurement
  4. The result (trimmed mean of 5 readings) will be displayed immediately
  5. The donut chart and Current Measurement card will update

During Spot measurement, the Auto and Void buttons are disabled.

7. Void / Catheterize

  1. Tap the Void / Catheterize button
  2. The current measurement is recorded to the voiding diary
  3. The catheter count decreases by 1
  4. The bladder level resets to 0
  5. A toast message "Voiding recorded" will appear

Managing Catheters

  • The catheter count is shown at the top of the screen (hospital icon + number)
  • Tap the catheter count to add more catheters
  • Enter the number and tap Add
  • Default starting count: 15 catheters

8. Settings

Tap the gear icon at the top right to open settings.

General Settings (always visible)

Setting Description Default
Max Volume Maximum bladder volume for fill calculation 500 mL
Catheter Threshold Alert level for catheterization Level 7

Developer Settings (Developer Mode only)

Setting Description
Threshold Otsu (auto) or manual echo threshold
DPS Distance per sample (mm)
Detection Method A / B / C
BV Frustum / V41 (volume calculation method)
SG Filter Savitzky-Golay noise filter on/off
Post Max Maximum sample index for wall detection (filters floor reflections)

Saving Settings

  • Adjust values using sliders and toggles
  • Tap Save to apply and close
  • Tap Cancel to close without changes (note: slider changes apply in real-time)

9. Navigation

Action Result
Placement button (top left) Go to Sensor Alignment
Settings button (top right) Open/close settings panel
Back button (Android) Go to previous screen
Back button on Home "Exit App?" confirmation dialog

10. Troubleshooting

Problem Solution
"Place sensor above pubic bone" won't go away Make sure the sensor is attached with gel, then press Start Alignment
Alignment keeps showing "Raise/Lower" Move the sensor very slowly, 1-2mm at a time
Auto measurement shows "—" Wait for at least 5 measurements to accumulate
Donut chart value doesn't change Max volume updates every 5 seconds
Spot measurement takes too long Each Spot takes ~4 seconds (5 readings)
"Sensor Position Issue" dialog appears The sensor may have shifted — go to Alignment
Bluetooth connection lost The app will attempt auto-reconnect (up to 5 times)
App freezes on measurement screen Check BLE connection, try disconnecting and reconnecting
Pairing dialog appears but app won't proceed You must tap Pair — canceling will block the connection

11. LED Indicators (Device)

LED State Meaning
Green blink (0.5s) Bluetooth scanning
Green on 1s / off 3s Device idle (not attached)
Orange blink (1s) Sensor Alignment in progress
Green solid Alignment complete (Optimal position)
Orange fast blink (3Hz) Error detected
Orange solid Charging
Blue solid Charging complete

12. Important Notes

  • Always use ultrasound gel between the sensor and skin
  • Keep the sensor still during measurement — movement reduces accuracy
  • Do not use the device while charging
  • The app keeps the screen on during use to prevent BLE disconnection
  • Measurement logs are automatically saved to your device:
    • BLE logs: Downloads/VesiScan_BLE_*.log
    • ADC data: Downloads/VesiScan_ADC/*.csv

Contact

For technical support, contact:

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