Editing Cardiopulmonary bypass (section)

===Pumps===

====Centrifugal pump====
Many CPB circuits now employ a [[centrifugal pump]] for the maintenance and control of blood flow during CPB. By altering the speed of revolution (RPM) of the pump head, blood flow is produced by [[centrifugal force]]. This type of pumping action is considered to be superior to the roller pump because it is thought to prevent over-pressurization, clamping, or kinking of lines, and causes less damage to blood products ([[hemolysis]], etc.).<ref name=":0" />

====Roller pump====
The pump console usually comprises several rotating, motor-driven pumps that [[peristalsis|peristaltically]] "massage" the tubing. '''This action gently propels the blood through the tubing.''' This is commonly referred to as a roller pump, or [[peristaltic pump]]. The pumps are more affordable than their centrifugal counterparts but are susceptible to over-pressurization if the lines become clamped or kinked.<ref name=":0" /> They are also more likely to cause a massive air embolism and require constant, close supervision by the perfusionist.<ref name=":33"/>