diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
index edf1084..290125a 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
@@ -435,9 +435,12 @@ fun PiezoMonitoringView(appState: AppState) {
                         lastMaxUpdateMs = nowMs
                     }
 
-                    if (lastVolumeMl > 0 && !isSpotInProgress) {
+                    // bladderLevel(=urgency=도넛 색깔)은 도넛 표시값과 동일하게 maxVolumeMl(세션 최대) 기준.
+                    // lastVolumeMl 기반으로 두면 auto scan trimmed mean이 max보다 낮을 때 색깔만 초록색으로
+                    // 떨어지고 표시값(309)은 그대로 유지되는 불일치 발생.
+                    if (maxVolumeMl > 0 && !isSpotInProgress) {
                         val maxVol = appState.piezoSettings.maxVolume.toDouble()
-                        val pct = if (maxVol > 0) (lastVolumeMl / maxVol).coerceAtMost(1.0) else 0.0
+                        val pct = if (maxVol > 0) (maxVolumeMl / maxVol).coerceAtMost(1.0) else 0.0
                         val level = (pct * BladderLevel.MAX_LEVEL).toInt().coerceIn(1, BladderLevel.MAX_LEVEL)
                         appState.bladderLevel = appState.bladderLevel.copy(currentLevel = level)
                     }