19 Questions
Who patented the first roller pump in 1855?
Porter and Bradley
Which pump was designed and manufactured by E. E. Allen in 1887?
Surgical pump
Who developed the first double roller pump in 1899?
Charles Truax
What is the function of peristaltic pumps?
To move fluid
Which type of pump is used in cross-circulation?
Sigma motor pump
What is the purpose of the Dodrill-GMR mechanical pump in the animal laboratory?
To adjust finger cot pumps
What was the first roller pump designed for?
Direct blood transfusion
Which pump was utilized in the Gibbon–IBM cardiopulmonary bypass machine?
Debakey–Schmidt pump
What was the name of the modification of the surgical pump designed by E. E. Allen?
Surgical pump
Which type of pump was the first to be developed for heart surgery?
Centrifugal pump
What safety feature was introduced in the 1950s for roller pumps?
Pressure-based servo-regulation
Which type of pump performs independent of afterload?
Roller pump
What can happen if there is a sudden occlusion of the inlet of the roller head?
Tubing may cavitate and create air bubbles in the circuit
Which type of pump utilizes a magnet and impeller combination to propel blood through the circuit?
Centrifugal pump
What is the purpose of servo-regulation in centrifugal pumps?
Automatic reduction of centrifugal head speed
Which type of pump has a risk of flow-induced blood damage and platelet activation?
Rotary piston pump
What happens after servoregulation occurs in roller pumps?
Complete cessation of the roller pump
What is the purpose of an Archimedes screw in removing water from the hold of a large ship?
To raise water
What is the control of speed and position of a motor based on a feedback signal called?
Servoregulation
Study Notes
History of Roller Pumps
- The first roller pump was patented in 1855.
- E.E. Allen designed and manufactured a pump in 1887.
- The first double roller pump was developed in 1899.
Function and Purpose of Pumps
- Peristaltic pumps perform a functions of propelling fluids through a tube.
- Cross-circulation uses a roller pump.
- The Dodrill-GMR mechanical pump is used in the animal laboratory for experimentation.
- The first roller pump was designed for surgical use.
- The Gibbon–IBM cardiopulmonary bypass machine utilized the roller pump.
Modifications and Safety Features
- E.E. Allen's modification of the surgical pump was called the Allen pump.
- The roller pump was the first to be developed for heart surgery.
- A safety feature introduced in the 1950s for roller pumps was occlusion detection.
Pump Mechanisms
- Centrifugal pumps perform independent of afterload.
- If there is a sudden occlusion of the inlet of the roller head, it can cause the pump to stop.
- Magnet and impeller combination pumps utilize a magnet and impeller to propel blood through the circuit.
- Centrifugal pumps use servo-regulation to control the pump's speed and flow rate.
Risks and Limitations
- Centrifugal pumps have a risk of flow-induced blood damage and platelet activation.
- After servoregulation occurs in roller pumps, the pump's speed and flow rate are adjusted.
Other Applications
- An Archimedes screw is used to remove water from the hold of a large ship.
- The control of speed and position of a motor based on a feedback signal is called servo-regulation.
Test your knowledge on the different types of pumps used during cardiopulmonary bypass (CPB) in perfusion. Learn about their functions, safety concerns, and methods of servoregulation. Explore the Sigma motor pump and its unique design used in cross-circulation by Dr. C. Walton.
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