Cardiopulmonary Bypass Pumps

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Questions and Answers

Who patented the first roller pump in 1855?

Porter and Bradley (correct)

E. E. Allen

Dr. C. Walton Lillehei

Charles Truax

Which pump was designed and manufactured by E. E. Allen in 1887?

Debakey–Schmidt pump

Surgical pump (correct)

Dodrill-GMR mechanical pump

Sigma motor pump

Who developed the first double roller pump in 1899?

Charles Truax (correct)

Dr. C. Walton Lillehei

Porter and Bradley

E. E. Allen

What is the function of peristaltic pumps?

To move fluid Signup and view all the answers

Which type of pump is used in cross-circulation?

Sigma motor pump Signup and view all the answers

What is the purpose of the Dodrill-GMR mechanical pump in the animal laboratory?

To adjust finger cot pumps Signup and view all the answers

What was the first roller pump designed for?

Direct blood transfusion Signup and view all the answers

Which pump was utilized in the Gibbon–IBM cardiopulmonary bypass machine?

Debakey–Schmidt pump Signup and view all the answers

What was the name of the modification of the surgical pump designed by E. E. Allen?

Surgical pump Signup and view all the answers

Which type of pump was the first to be developed for heart surgery?

Centrifugal pump Signup and view all the answers

What safety feature was introduced in the 1950s for roller pumps?

Pressure-based servo-regulation Signup and view all the answers

Which type of pump performs independent of afterload?

Roller pump Signup and view all the answers

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 Signup and view all the answers

Which type of pump utilizes a magnet and impeller combination to propel blood through the circuit?

Centrifugal pump Signup and view all the answers

What is the purpose of servo-regulation in centrifugal pumps?

Automatic reduction of centrifugal head speed Signup and view all the answers

Which type of pump has a risk of flow-induced blood damage and platelet activation?

Rotary piston pump Signup and view all the answers

What happens after servoregulation occurs in roller pumps?

Complete cessation of the roller pump Signup and view all the answers

What is the purpose of an Archimedes screw in removing water from the hold of a large ship?

To raise water Signup and view all the answers

What is the control of speed and position of a motor based on a feedback signal called?

Servoregulation Signup and view all the answers

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.

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Description

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.