We use the Sigma pumps where I work; they have the advantage of free-flow protection, and they're easy to program. Their main DISadvantage is that they don't work with the tubing our local EMS uses, so IVs established in the field have to be changed when the patient comes the floor (which is a pain for both the patient and the nurse). But otherwise, I like them for their simplicity and especially for the feature that alarms when IVPBs aren't flowing.....we used to have problems with piggybacks not infusing because the nurse forgot to check the clamp, and there they'd be six hours later, still full, when it was time for the next dose!
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