Mechanical Circulatory Devices

Question 1

What is IABP?

Answer 1

Intra-aortic ballon pump

Question 2

What is LVAD and RVAD?

Answer 2

Left Ventricular device

Right Ventricular Device

Question 3

What is preload?

Answer 3

The amount of stretch on the ventricular myocardium prior to contraction.

Question 4

What is AEDP?

Answer 4

Aortic end diastolic pressure

Question 5

what is normal ejection fraction?

Answer 5

55-75%

Question 6

What does 40 - 50% ejection fraction indicate?

Answer 6

damage to the myocardium

Question 7

What does an ejection fractioln of <40% indicate?

Answer 7

heart failure

Question 8

What is the most common circulatory device in the US?

Answer 8

IABP

Question 9

Describe the location of IABP.

Answer 9

1-2 cm below the subclavian artery.

the balloon is positioned so that the tip is about 1 cm distal to the left subclavian artery.

Question 10

How much helium is pumped into and out of the balloon ?

Answer 10

35-40cc

Question 11

What the 5 goals of inflation?

Answer 11

increase coronary perfusion
increase systemic perfusion pressure
increase peripheral oxygen supply
indirectly decrease SVR
decrease heart rate

Question 12

what are the 3 ways the timing can be triggered on a IABP?

Answer 12

R wave
arterial waveform
pacing spike

Question 13

During what does the IABP need to be placed in pressure mode and not ekg mode?

Answer 13

cardiac arrest

Question 14

what size syringe do you use if your IABP fails, and how often do you use it?

Answer 14

40-60 cc luer lock

once every 5-10 min

Question 15

What is an indication for ECMO on an adult?

Answer 15

Hypoxemic respiration failure

Question 16

What type of resuscitaion is considered first line for VAD patients?

Answer 16

Volume resuscitation

Question 17

What might be absent or weak in VAD patients?

Answer 17

Peripheral pulses