@startuml End_Treatment
    participant TD                  as TD
    participant SW                  as SW
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction types
    ' External on CANBus
    ' TD -> SW: MSG: Message
    ' SW -> TD: MSG: Message

    ' Internal to the application
    ' XX -> YY: CMD: Command
    ' XX -> XX: ACT: Action

    ' External on OS/FS
    ' SW -> Script: ACT: Command
    ' Script -> OS: CMD: Command
    ' Script -> SW: MSG: Message
    ' OS -> Script: MSG: Message

    ' US -> UI: User actions are:
    '   ASK: Display a <message>
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SCL: User scrolls a flip-able area

    == End of Treatment ==
    TD -> SW: MSG: [x3C: #7] End Treatment      \
                \n\t TDTreatmentStates.TREATMENT_END_STATE \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      
    SW -> UI: ACT: Notify UI 
    UI -> US: ACT: Notify user with Treatment Complete dialog

    group Stay on Treatment
        US -> UI: TCH: Stay on Treatment button
        US -> UI: ACT: Allowable actions:                                           \
                    \n\t Adjust blood flow rate (blood sampling)                    \
                    \n\t Perform Isolated Ultrafiltration                           \
                    \n\t Perform a saline bolus                                     \
                    \n\t Take a vitals measurement                                  \
                    \n\t Adjust or reset venous, arterial, and TMP pressure limits

        UI -> UI: ACT: Disable Adjustments:     \
                    \n\t Dialysate flow         \
                    \n\t Dialysate temperature  \
                    \n\t Dialysate conductivity \
                    \n\t Ultrafiltration        \
                    \n\t Treatment duration
        US -> UI: TCH: Open End Treatment dialog through headerbar button
    end

    group End Treatment
        US -> UI: TCH: End Treatment button
        UI -> SW: ACT: Request End Treatment
        SW -> TD: MSG: [xXX: #0] Request End Treatment
        TD -> SW: MSG: [xXX: #2]        \
                    \n\tResponse:       \
                    \n\t(U32)  mAccepted\
                    \n\t(U32)  mReason  
        SW -> UI: ACT: End Treatment Response
        alt Accepted
            UI -> UI: ACT: Close Popup
            TD -> SW: MSG: [x3C: #7] Rinseback     \
                \n\t TDTreatmentStates.TREATMENT_RINSEBACK_STATE \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0      \
                \n\t(U32)  0     
        SW -> UI: ACT: Notify UI 
        UI -> US: ACT: Show Rinseback screen
        else #Pink Rejected
            UI -> US: ACT: Notify User displaying rejection reason  
        end
    end
@enduml