How To: Implement Modeling, from Patient model to Device simulation

To create new types of tracings/waveforms on the Patient model:

II.Patient (Classes/Patient.cs)

• Timer: need to define a Timer to trigger the modeling w/ event .Tick
  • Utilize a Baseline timer (for isoelectric lines) and an Additional timer for unique events
    • e.g. Atrial or Ventricular contractions
  • Add the Timer to:
    • Dispose()
    • ProcessTimers()
    • InitTimers(): attach a function as a delegate to run every time Timer.Tick is triggered
    • SetTimers()
    • StopTimers()
• PatientEventTypes: Add a corresponding event type to enum PatientEventTypes
• Function (e.g. OnCardiac_Atrial()): Add a function that the Timer.Tick event is attached to in InitTimers()
  • Triggers PatientEvent event (with args including enum PatientEventType)
    • This is where all simulated clinical devices will subscribe to and be triggered from
  • Logic here adjusts the Timer's interval and/or resets the Timer to replicate clinical realism
    • May implement additional timers or counters to adjust for aberrancy and variance

II_Avalonia.PatientEditor (Windows/PatientEditor.cs)

• Is the parent Window for all clinical Devices
  • When creating and spawning the Device Window, subscribes a Device function to Patient.PatientEvent
    • e.g. App.Patient.PatientEvent += App.Device_ECG.OnPatientEvent;
    • This creates the connection between the Patient model to the simulated Device

II_Avalonia.Device (Windows/Device, e.g. DeviceECG)

• Function OnPatientEvent() will be triggered every time a PatientEvent occurs
  • Need to switch (e.EventType) and only process logic on desired PatientEventTypes
  • Cycles through all Numerics and Tracings and calls appropriate functions to model event response
    • Direct updates to UI will need to be called via Dispatcher to ensure thread safety
    • This is where Tracings.Strip will be called to update tracings based on clinical events

II.Rhythm.Strip (Classes/Rhythm.Strip.cs)

• Individual functions here will modify tracing strips to replicate clinical realism
  • Can call Concatenate(), Replace(), Underwrite() to draw directly to tracing Strip
  • Can call static drawing functions in II.Rhythms (Rhythms.cs) to process drawing logic for many similar rhythms
    • e.g. II.Cardiac_Rhythms differentiates all the cardiac rhythms and draws appropriate clinical simulation
  • Can call II.Waveform.Draw (Waveform.Draw.cs) static functions() to plot pre-made waves onto Strip
    • e.g. for waveforms that are generally uniform and waveform shape not specifically dependent on rhythms
      • e.g. SpO2, IABP, ABP, pacemaker spikes, defibrillation