Enter the pulmonary artery compliance (Pac) and pulmonary artery resistance (Pra) into the calculator to determine the Pac/Pra ratio. This ratio is used to assess the pulmonary vascular bed’s compliance and resistance.
Pac/Pra Ratio Formula
The following formula is used to calculate the Pac/Pra ratio:
Ratio = Pac / Pra
Variables:
- Pac is the pulmonary artery compliance (mmHg)
- Pra is the pulmonary artery resistance (mmHg)
To calculate the Pac/Pra ratio, divide the pulmonary artery compliance (Pac) by the pulmonary artery resistance (Pra).
What is the Pac/Pra Ratio?
The Pac/Pra ratio is a measure used in cardiology to assess the relationship between the compliance of the pulmonary artery and the resistance within the pulmonary vascular bed. A higher ratio indicates a more compliant pulmonary artery, which is generally favorable. This ratio can be important in the evaluation of patients with pulmonary hypertension and other cardiovascular diseases.
How to Calculate the Pac/Pra Ratio?
The following steps outline how to calculate the Pac/Pra Ratio:
- First, determine the pulmonary artery compliance (Pac) in mmHg.
- Next, determine the pulmonary artery resistance (Pra) in mmHg.
- Next, gather the formula from above = Ratio = Pac / Pra.
- Finally, calculate the Pac/Pra Ratio.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Pulmonary artery compliance (Pac) = 5 mmHg
Pulmonary artery resistance (Pra) = 2 mmHg
