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Pulmonary Vascular Resistance (PVR) a. Define Pulmonary Vascular Resistance (PVR). b. State the formula...

6. Pulmonary Vascular Resistance (PVR)
a. Define Pulmonary Vascular Resistance (PVR).
b. State the formula used to calculate PVR.
c. The normal range for PVR is ______.
d. List two factors that may cause PVR to increase.
1)
2)
e. Calculate the Systemic Vascular Resistance and Pulmonary Vascular Resistance for a patient with the following parameters:
MAP 80 mm Hg
CVP 10 mm Hg
MPAP 24 mm Hg
PCWP 8 mm Hg
C𝑟 4 L/min.
Systemic Vascular Resistance =
Pulmonary Vascular Resistance =

Answer

  1. Define Pulmonary Vascular Resistance (PVR): Pulmonary Vascular Resistance (PVR) is the resistance that the pulmonary circulation offers against the flow of blood from the right side of the heart to the lungs.

  2. State the formula used to calculate PVR: PVR = (MPAP - PCWP) / Cardiac Output

  3. The normal range for PVR is: 100 - 200 dynes·sec/cm5

  4. List two factors that may cause PVR to increase:

    1. Hypoxia
    2. Acidosis

  5. Calculate the Systemic Vascular Resistance and Pulmonary Vascular Resistance for a patient with the following parameters:

    MAP = 80 mm Hg
    CVP = 10 mm Hg
    MPAP = 24 mm Hg
    PCWP = 8 mm Hg
    C𝑟 = 4 L/min.

    Systemic Vascular Resistance (SVR): SVR = (MAP - CVP) / Cardiac Output = (80 - 10) / 4 = 17.5 Wood units or 1400 dynes·sec/cm5

    Pulmonary Vascular Resistance (PVR): PVR = (MPAP - PCWP) / Cardiac Output = (24 - 8) / 4 = 4 Wood units or 320 dynes·sec/cm5

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