Volume calculations practice quiz

Question 1

Stroke volume is the amount of blood pumped in one minute

True

False

Answer 1

False

Question 2

Given the following information please calculate the stroke volume.
BP: 120/60, HR: 82 BPM, LA pressure 10, MV mean 5 mmHg, LV 120 mmHg, LVOT VTI 27 cm , AV VTI 31 cm, TR: 3 m/s, IVC: Normal size and > 50% collapsable, LVOT diameter: 1.8 cm, Aortic root diameter 2.1 cm

69 mL

78 mL

93 mL

107 mL

Answer 2

69ML

1.8Squared X 0.785 =2.54

2.54 x 27 = 68.67

69ML

Question 3

Which two echo views would be most imperative to obtain when asked to calculate the stroke volume?

Parasternal short axis and apical four chamber

Parasternal short axis and apical five chamber

Parasternal long axis and apical five chamber

Parasternal long axis and apical four chamber

Answer 3

Parasternal long axis and apical five chamber

Question 4

What are two factors as sonographers we can do to help ensure the stroke volume is as accurate as possible?

Ensure the Doppler signal is taken parallel to flow, measure the inner to inner edge on the LVOT diameter.

Ensure the Doppler signal is taken perpendicular to flow, obtain the AV peak velocity.

Ensure the Doppler signal is taken perpendicular to flow, trace on the inner edge of the modal velocity

Ensure the Doppler signal is taken parallel to flow, measure outer to outer edge of the LVOT diameter.

Answer 4

Ensure the Doppler signal is taken parallel to flow, measure the inner to inner edge on the LVOT diameter.

Question 5

Which two echo views would be most imperative to obtain when asked to calculate the stroke volume?

Parasternal long axis and apical five chamber

Parasternal long axis and apical four chamber

Parasternal short axis and apical five chamber

Parasternal short axis and apical four chamber

Answer 5

Parasternal long axis and apical five chamber

Question 6

Given the following information please calculate the cardiac output.
BP: 120/60, HR: 82 BPM, LA pressure 10, MV mean 5 mmHg, LV 120 mmHg, LVOT VTI 27 cm , AV VTI 31 cm, TR: 3 m/s, IVC: Normal size and > 50% collapsable, LVOT diameter: 1.8 cm, Aortic root diameter 2.1 cm

3.4 L

5.6 L

4.5 L

5.6 L

7.6 L

Answer 6

5.6L

The cardiac output is the SV X HR

Therefore we need to calculate first the SV then X by the HR to get the CO.

So
1.8Squared X 0.785 =2.54

2.54 x 27 = 68.67

=69ML

69x82 (HR) = 5.6L