UPDATED IABP EXAM TEST VERIFIED SOLUTIONS LATEST UPDATE

How and where is the IABP placed in a patient? - ANSWER femorally into the descending thoracic aorta just below left subclavian artery but above the renal arteries What kind of gas is shuttled from the balloon pump into balloon catheter? - ANSWER helium What kind of gas is helium and how does it help the inflation? - ANSWER a light gas, minimized shuttle time and increases efficiency When does inflation occur? - ANSWER immediately upon onset of diastole Is the balloon physically pulsed in counter-pulsation to the patients cardiac cycle? - ANSWER Yes When is the balloon deflated? - ANSWER during isometric contraction or early systole What is the new volume of balloon and for what height person? - ANSWER 50cc, 5ft4in+ What is the volume of balloon for a person shorter than 5 ft (152 cm)? - ANSWER 25cc What is the volume of the balloon for person 5ft to 5ft4in? - ANSWER 34cc What was the balloon size for someone 5ft4in to 6ft? - ANSWER 40cc Where should the tip of the balloon be located? - ANSWER distal to arch vessels: about level to tip of endotracheal tube where should the distal portion of the balloon be located? - ANSWER above the renal arteries Should blood ever be in the gas side of balloon? Is this an emergency? - ANSWER no, must be replaced yes If the ballon placement is too high, what will the left radial pulse do? - ANSWER dampen What are indicators the ballon is too low? - ANSWER 1) decreased urine output 2) abdominal pain Can an IABP provide adequate circulation in the abscence of a significant contribution from the patients own left ventricle? - ANSWER No, it acts as an auxillary pump to the heart How does inflation increase MVO2 supply? - ANSWER it increases diastolic pressure and diastolic perfusion gradient therefore contributes to coronary, cerebral, and systemic blood flow How does deflation decrease myocardial demand? - ANSWER Decrease afterload. It lowers the impedance to systolic ejection and the next systolic pressure. decrease myocardial work and O2 requirements. Decreases end diastole The increase in cadiac output observed with a IABP is about how much? - ANSWER 0.5-1.0 L/min What is the primary effect of IABP? - ANSWER unloading the heart to decrease workload on heart. decrease static work What is the secondary effects of IABP? - ANSWER 1) increased CO 2) decreased SVR 3) stretched baroreceptors cause decreased HR 4) increases systolic pressure 5) decreases diastolic pressure 6) increase in MAP 7) increases diastolic augmentation