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Commit 65f1790a authored by Jeff Webb's avatar Jeff Webb
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Random tweaks and update to chest wall compliance calculation to prevent... 

Random tweaks and update to chest wall compliance calculation to prevent weirdness with conscoius respiration.
parent ffb796f6
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docs/Markdown/MainPageFeatures.md
View file @ 65f1790a
......@@ -79,6 +79,7 @@ Our user manual offers in-depth details of all the Pulse asset functionality. It
</center>
</td>
<td width="40%" valign="top" style="border-top:2px solid Gainsboro; padding:3px">
&bull; <a href="https://traumasimulator.com">Trauma Simulator Website</a><br>
&bull; <a href="https://militarysimulation.training/technology/exonicus-kitware-trauma-simulator-%ef%bb%bf/">Military Simulation & Training Magazine Article</a><br>
&bull; <a href="https://blog.kitware.com/exonicus-and-kitware-collaborate-to-develop-a-trauma-simulator-using-the-pulse-physiology-engine/">Kitware Blog Post</a><br>
</td>
......
engine/cpp/physiology/Respiratory.cpp
View file @ 65f1790a
......@@ -287,7 +287,7 @@ void Respiratory::Initialize()
GetPulmonaryCompliance().SetValue(0.1, VolumePerPressureUnit::L_Per_cmH2O);
GetLungCompliance().SetValue(0.1, VolumePerPressureUnit::L_Per_cmH2O);
GetChestWallCompliance().SetValue(0.1, VolumePerPressureUnit::L_Per_cmH2O);
GetChestWallCompliance().SetValue(0.2, VolumePerPressureUnit::L_Per_cmH2O);
GetPulmonaryElastance().SetValue(1.0 / 0.1, PressurePerVolumeUnit::cmH2O_Per_L);
// Muscle Pressure Waveform
......@@ -448,7 +448,7 @@ void Respiratory::AtSteadyState()
Info(ss);
ss << typeString << "Patient functional residual capacity = " << m_FunctionalResidualCapacity_L << " L.";
Info(ss);
ss << typeString << "Patient totoal lung capacity = " << m_TotalLungCapacity_L << " L.";
ss << typeString << "Patient total lung capacity = " << m_TotalLungCapacity_L << " L.";
Info(ss);
ss << typeString << "Patient residual volume = " << m_ResidualVolume_L << " L.";
Info(ss);
......@@ -541,7 +541,7 @@ void Respiratory::Process()
CalculateVitalSigns();
#ifdef DEBUG
Debugging();
Debugging(RespirationCircuit);
#endif
}
......@@ -1290,7 +1290,7 @@ void Respiratory::RespiratoryDriver()
}
double tau = 0.0;
double tauDenominator = 10.0; //lower = "rounder"... too low (seems to be < 5) starts creating incontinuities
double tauDenominator = 4.0; //lower = "rounder"... too low (seems to be < 5) starts creating incontinuities
if (m_BreathingCycleTime_s >= ResidueFractionTimeStart_s)
{
m_DriverPressure_cmH2O = 0.0;
......@@ -1352,7 +1352,7 @@ void Respiratory::RespiratoryDriver()
//--------------------------------------------------------------------------------------------------
void Respiratory::SetBreathCycleFractions()
{
////Healthy = 0.34 remaining, giving ~1:2 IE Ratio
//Healthy = 0.34 remaining, giving ~1:2 IE Ratio
m_InspiratoryRiseFraction = 0.33 * m_IERatioScaleFactor;
m_InspiratoryHoldFraction = 0.0;
m_InspiratoryReleaseFraction = MIN(0.33 / m_IERatioScaleFactor, 1.0 - m_InspiratoryRiseFraction);
......@@ -2122,8 +2122,6 @@ void Respiratory::TuneCircuit()
//--------------------------------------------------------------------------------------------------
void Respiratory::UpdateChestWallCompliances()
{
/// \todo A lot of this stuff we don't need to recalculate every timestep - it can be made more efficient
/// \cite venegas1998comprehensive
double rightLungRatio = m_Patient->GetRightLungRatio().GetValue();
......@@ -2191,20 +2189,12 @@ void Respiratory::UpdateChestWallCompliances()
}
//Dampen the change to prevent potential craziness
double maxChange_L_Per_cmH2O_s = 1.0;
//It will only change half as much as it wants to each time step to ensure it's critically damped and doesn't overshoot
double dampenFraction = 0.5;
double previousChestWallCompliance_L_Per_cmH2O = chestWallPath->GetCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double complianceChange_L_Per_cmH2O = chestWallCompliance_L_Per_cmH2O - previousChestWallCompliance_L_Per_cmH2O;
if (complianceChange_L_Per_cmH2O > 0.0)
{
complianceChange_L_Per_cmH2O = MIN(complianceChange_L_Per_cmH2O, maxChange_L_Per_cmH2O_s * m_dt_s);
}
else if (complianceChange_L_Per_cmH2O < 0.0)
{
complianceChange_L_Per_cmH2O = MAX(complianceChange_L_Per_cmH2O, -maxChange_L_Per_cmH2O_s * m_dt_s);
}
double complianceChange_L_Per_cmH2O = (chestWallCompliance_L_Per_cmH2O - previousChestWallCompliance_L_Per_cmH2O) * dampenFraction;
chestWallCompliance_L_Per_cmH2O = previousChestWallCompliance_L_Per_cmH2O + complianceChange_L_Per_cmH2O;
chestWallPath->GetNextCompliance().SetValue(chestWallCompliance_L_Per_cmH2O, VolumePerPressureUnit::L_Per_cmH2O);
}
......@@ -3053,45 +3043,45 @@ void Respiratory::ModifyDriverPressure()
/// \brief
/// Output data tracks for debugging purposes
//--------------------------------------------------------------------------------------------------
void Respiratory::Debugging()
void Respiratory::Debugging(SEFluidCircuit& RespirationCircuit)
{
m_data.GetDataTrack().Probe(RespirationCircuit);
double leftAlveoliPressure = m_LeftAlveoli->GetNextPressure(PressureUnit::cmH2O);
double leftAlveoliVolume = m_LeftAlveoli->GetNextVolume(VolumeUnit::L);
double leftPleuralPressure = m_LeftPleural->GetNextPressure(PressureUnit::cmH2O);
double leftPleuralVolume = m_LeftPleural->GetNextVolume(VolumeUnit::L);
double leftFlow = m_LeftAlveolarDeadSpaceToLeftAlveoli->GetNextFlow(VolumePerTimeUnit::L_Per_s);
double leftCompliance = m_LeftPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double leftChestWallCompliance_L_Per_cmH2O = m_RightPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double leftLungCompliance_L_Per_cmH2O = m_RightAlveoliToRightPleuralConnection->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double rightAlveoliPressure = m_RightAlveoli->GetNextPressure(PressureUnit::cmH2O);
double rightAlveoliVolume = m_RightAlveoli->GetNextVolume(VolumeUnit::L);
double rightPleuralPressure = m_RightPleural->GetNextPressure(PressureUnit::cmH2O);
double rightPleuralVolume = m_RightPleural->GetNextVolume(VolumeUnit::L);
double rightFlow = m_RightAlveolarDeadSpaceToRightAlveoli->GetNextFlow(VolumePerTimeUnit::L_Per_s);
double rightCompliance = m_RightPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double rightChestWallCompliance_L_Per_cmH2O = m_RightPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double rightLungCompliance_L_Per_cmH2O = m_RightAlveoliToRightPleuralConnection->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
m_data.GetDataTrack().Probe("leftAlveoliPressure", leftAlveoliPressure);
m_data.GetDataTrack().Probe("leftAlveoliVolume", leftAlveoliVolume);
m_data.GetDataTrack().Probe("leftPleuralPressure", leftPleuralPressure);
m_data.GetDataTrack().Probe("leftPleuralVolume", leftPleuralVolume);
m_data.GetDataTrack().Probe("leftFlow", leftFlow);
m_data.GetDataTrack().Probe("leftCompliance", leftCompliance);
m_data.GetDataTrack().Probe("leftChestWallCompliance_L_Per_cmH2O", leftChestWallCompliance_L_Per_cmH2O);
m_data.GetDataTrack().Probe("leftLungCompliance_L_Per_cmH2O", leftLungCompliance_L_Per_cmH2O);
m_data.GetDataTrack().Probe("rightAlveoliPressure", rightAlveoliPressure);
m_data.GetDataTrack().Probe("rightAlveoliVolume", rightAlveoliVolume);
m_data.GetDataTrack().Probe("rightPleuralPressure", rightPleuralPressure);
m_data.GetDataTrack().Probe("rightPleuralVolume", rightPleuralVolume);
m_data.GetDataTrack().Probe("rightFlow", rightFlow);
m_data.GetDataTrack().Probe("rightCompliance", rightCompliance);
m_data.GetDataTrack().Probe("rightChestWallCompliance_L_Per_cmH2O", rightChestWallCompliance_L_Per_cmH2O);
m_data.GetDataTrack().Probe("rightLungCompliance_L_Per_cmH2O", rightLungCompliance_L_Per_cmH2O);
double AmbientPresure = 1033.23; // = 1 atm
m_data.GetDataTrack().Probe("LeftRelativePleuralPressure_cmH2O", leftPleuralPressure - AmbientPresure);
m_data.GetDataTrack().Probe("RightRelativePleuralPressure_cmH2O", rightPleuralPressure - AmbientPresure);
double leftChestWallCompliance_L_Per_cmH2O = m_RightPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double rightChestWallCompliance_L_Per_cmH2O = m_RightPleuralToRespiratoryMuscle->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double leftLungCompliance_L_Per_cmH2O = m_RightAlveoliToRightPleuralConnection->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
double rightLungCompliance_L_Per_cmH2O = m_RightAlveoliToRightPleuralConnection->GetNextCompliance(VolumePerPressureUnit::L_Per_cmH2O);
m_data.GetDataTrack().Probe("RightRelativePleuralPressure_cmH2O", rightPleuralPressure - AmbientPresure);
double leftSideCompliance_L_Per_cmH2O = 1.0 / (1.0 / leftChestWallCompliance_L_Per_cmH2O + 1.0 / leftLungCompliance_L_Per_cmH2O);
double rightSideCompliance_L_Per_cmH2O = 1.0 / (1.0 / rightChestWallCompliance_L_Per_cmH2O + 1.0 / rightLungCompliance_L_Per_cmH2O);
......
engine/cpp/physiology/Respiratory.h
View file @ 65f1790a
......@@ -90,7 +90,7 @@ protected:
//Process
void CalculateVitalSigns();
void Debugging();
void Debugging(SEFluidCircuit& RespiratoryCircuit);
// Serializable member variables (Set in Initialize and in schema)
// Initial patient values
......
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