Perfusion (part 2) Flashcards
What are the two types of pump heads?
Roller and centrifugal pump
Which pump head is afterload independent?
Roller pump
Which pump head needs flowmeter?
Centrifugal pump
Which pump head has possibility of retrograde flow if pump stops?
Centrifugal pump
Which pump head is cheaper?
Roller pump
Which pump head is portable?
Centrifugal pump
Which pump head is short term use only?
Roller pump
Which pump head has circuit disruption from excessive line pressure?
Roller pump
Which pump head has greater risk of air embolism?
Roller pump
Which pump head has more priming volume?
Centrifugal pump
Which pump head is mostly used by CPB?
Roller pump
Why is the roller pump bulky?
Because it uses 2 rollers
Which pump head is more prone to heat generation?
roller pump
What is the purpose of the 2 rollers in pump head?
it rolls blood through tubing
The roller pump positively displace blood through _________________
peristaltic motion
TRUE OR FALSE:
Centrifugal pump is used because the roller pump can damage in blood components
TRUE
Roller pump produces ____________ while centrifugal pump produces _____________
flow, pressure
The centrifugal pump spins as a result of __________________
magnetic force
When the cone spins in centrifugal pump, it generates ____________
negative pressure = sucks blood creating vortex
What is the range of centrifugal force of centri pump?
2000-4000rpm
Which is more preferred pump head?
Centri pump
This pump head is reserved for more complex surgery of prolonged duration
Centri pump
Which pump head produces less hemolysis and platelet activation?
Centri pump
This component of the CPB acts as a CHAMBER FOR VENOUS BLOOD to drain into before it is pumped into the oxygenator and permits ready access for the addition of fluids and drugs
Reservoir
What are the other function of reservoir?
provides high efficiency filtration, defoaming, and responsible for removing foreign particles
To reduce the risk of perfusion accident, the reservoir needs _______________
to maintain a level of fluid
What are the two types of reservoir?
Hard shell and collapsible
Between the two types of reservoir, which is used for adult cardiac surgery?
Hard shell
This reservoir is comprised of polycarbonate housing, has polyester depth filter, and polyurethane defoamer
Hard shell
What is the function of oxygenator?
It provides an interface of high surface area between blood on one side and gas on the other
For the gas to travel across the interface, the oxygenator must be ____________
constructed with very thin material
What is the requirement for an oxygenator?
needs efficient oxygenation of desaturated hemoglobin and simultaneous removal of CO2
What is the most commonly used ooxygenator?
membrane oxygenator with microporous polypropylene hollow fiber structure
The internal diameter of membrane oxygenator is ________
100-200um
This is used to reduce the release of gaseous emboli due to alteration of temperature of saturated blood
Heat exchanger
The heat exchanger is placed _________________
proximal to oxygenator
This acts as the arterial capillary system of CPB machine
Oxygenator
What is the common constituent of all cardioplegia solutions?
High concentration of potassium
The common constituent of all cardioplegia solutions produces ____________________
diastolic cardiac arrest
This component of CPB is used to induce arrest of heart
Cardioplegia delivery system
This method is used to protect the heart or myocardial protection
Cardioplegia delivery system
The electromechanical arrest from the cardioplegia solution reduces ___________
oxygen consumption
The cardioplegia cannula is inserted _____________
proximally