CPB Flashcards
sedation and paralysis allow
sedation and paralysis allow
- decreased CMRO2
- allows for lower flows than normal r/t decrease metabolism (leads to less physiological changes)
- also prevents shivering
Predicted Dilutional HCT formula
Post Dilutional HCT = RBCV / TCBV + prime
PRBCs/FFP are indiciated
PRBCs/FFP are indiciated when predicted dilutional HCT <24%
Normal ACT and Therapeutic ACT
Normal ACT and Therapeutic ACT
- normal: 70-120 sec
- Therapeutic: >450 sec
nitroglycerine reduces the effectiveness of
nitroglycerine reduces the effectiveness of
heparin
at what temperature does ventricular fibrillation occur
25 - 30c
rate of take-backs s/p CABG
rate of take-backs s/p CABG
- 4-10% of CABGs return to surgery
For what reasons do most postoperative coronary bypass patients return to surgery
For what reasons do most postoperative coronary bypass patients return to surgery
- Persistent bleeding
- excessive blood loss
- cardiac tamponade
- unexplained low cardiac output
heparin loading dose
heparin loading dose
- 300 - 400 units/kg
- ACT >400 (480)
pump suckers are started
pump suckers are started
once ACT is at least >300
AT3 deficiency is suspected once total heparin dose reaches…
AT3 deficiency is suspected once total heparin dose reaches…
- 600 units/kg and ACT is still less than 300
AT3 deficiency can be a result of
AT3 deficiency can be a result of
- inherited
- acquired r/t prior heparin exposure
units of AT3 per mL of FFP
units of AT3 per mL of FFP
1 unit of AT3 per 1 mL of FFP
indications for femoral aortic cannulation
indications for femoral aortic cannulation
- calcified aorta
- re-do CABG
- rapid initiation
- CPB before sternotomy
Femoral artery can be cannulated if the aorta is calicifed, or if its re-do procedure, where there is concern for adhesion to chest wall and re-opening the sternum poses a risk to the aorta or LV
femoral vein (venous) canulation is indicated when
femoral vein (venous) canulation is indicated when
- re-do procedure
- minimally invasive surgery
