Guyton organ systems physiology cardiovascular circulation stress relaxation Guyton SR1A, SR2A, SR3A, AR4A, and SR5A: Similar calculations to the above but this time with a long time constant for stress relaxation (SRK2), and also having a separate variable for control of the ultimate degree of the stress relaxation (SR2). The output of this long time constant stress relaxation (VV6) along with the output from the short time constant stress relaxation (VV7) are subtracted from the actual venous volume (VVS) in Block CD15 in the hemodynamic section of the model. keyword SR1 and SR2: Calculation of the ultimate degree of change in basic venous volume to be caused by the short-term stress relaxation factor with input to the system equal to the instantaneous excess venous volume (VVE); a multiplier factor controls the degree of stress relaxation that will occur (SR). SR3, SR4, and SR5: This is a delay circuit having a short time constant (SRK). The output of this circuit (VV7) approaches the ultimate degree of stress relaxation caused by short-term stress relaxation as calculated from Block SR2. NB - REMOVED THE DAMPING FROM THE INTEGRAL!!! Description of Guyton stress relaxation module Effect of Stress Relaxation on Basic Venous Volume (V0) This section calculates the effect over a period of time caused by excess volume (or too little volume) in the venous tree to cause changes in the volume holding capacity of the venous tree when it is fully filled with blood but at zero pressure. In this model, there are two separate parallel stress relaxations of the veins. One of these has a short time constant (SRK) and the other has a long time constant (SRK2). SR1 and SR2: Calculation of the ultimate degree of change in basic venous volume to be caused by the short-term stress relaxation factor with input to the system equal to the instantaneous excess venous volume (VVE); a multiplier factor controls the degree of stress relaxation that will occur (SR). SR3, SR4, and SR5: This is a delay circuit having a short time constant (SRK). The output of this circuit (VV7) approaches the ultimate degree of stress relaxation caused by short-term stress relaxation as calculated from Block SR2. NB - REMOVED THE DAMPING FROM THE INTEGRAL!!! 100000 200000 Encapsulation grouping component containing all the components in the Stress Relaxation Model. The inputs and outputs of the Stress Relaxation Model must be passed by this component. Stress Relaxation SR1A, SR2A, SR3A, AR4A, and SR5A: Similar calculations to the above but this time with a long time constant for stress relaxation (SRK2), and also having a separate variable for control of the ultimate degree of the stress relaxation (SR2). The output of this long time constant stress relaxation (VV6) along with the output from the short time constant stress relaxation (VV7) are subtracted from the actual venous volume (VVS) in Block CD15 in the hemodynamic section of the model. 2008-00-00 00:00