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Infusion pumps designed to deliver large volumes of liquid medications and other therapeutic solutions usually through intravenous (IV) or epidural routes at pre-established accurate flow rates capable of working in high intensity magnetic fields such as those present during magnetic resonance imaging (MRI) procedures without introducing hazardous conditions or producing artifacts in the MRI images. MRI safe infusion pumps do not have ferromagnetic parts or produce radiofrequency interference; conditional safe pumps may be safe up to a magnetic intensity value (e.g., up to 3 Tesla) or in certain locations of the suite depending on gauss line locations, but cannot be identified as having no ferromagnetic parts. These infusion pumps usually consist of a pumping mechanism that is not affected by magnetic fields to move fluid from the solution container through the IV set to the patient. The most common type is the linear peristaltic mechanism (which uses fingerlike disks to occlude the IV tubing successively in a rippling, wavelike motion); the mechanisms may be also rotatory peristaltic or cassette type. They also include controls used to select the dose or volume to be infused; recording capabilities to register the actual infusion volume and rate; and audible and/or visual alarms to indicate abnormal conditions. Some pumps (known as \'smart pumps\') include software capable of detecting medication administration errors (i.e., dose error reduction systems) are also available. MRI large-volume multitherapy infusion pumps are usually intended for IV pole mounting; they are used mainly in MRI areas in hospitals and other healthcare facilities.
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