Peristaltic Pump (from Internet Glossary of Pumps)
Peristaltic Pump
One of the main advantages of the Peristaltic Pump is cleanliness. It also utilizes another advantage: Fragile blood cells are not damaged by this pump.

The flexible tube (in this drawing its edges are blue and yellow for clarity) is connected on the inlet side to the patient's artery, and on the outlet side to the patient's vein.

In this example three rollers on rotating arms pinch the tube against an arc and move the fluid along. There are usually three or four sets of rollers.

Peristaltic pumps have a variety of medical applications. They can be used to add nutrients to blood, to force blood through filters to clean it, or to move blood through the body and lungs during open heart surgery.

(This is a 12-frame animation, converted to animated GIF format for Internet transmission. (Note: On some Internet browsers it may be displayed much less smoothly than the CD-ROM version, where the frames are timed to a thousandth of a second.))

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Last modified February, 2002
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