Contact your pump manufacturer if you are unsure whether your pump is open or closed system. All Medela pumps EXCEPT Lactina/Symphony/other older hospital grade pumps.Spectra: M1, S1, S2, Dew 350 OPEN system pumps include:. ![]() ![]() Without any studies, it’s really hard to say what to do if you find signs of contamination in your pump – the potential for illness is there but we don’t know how likely it is. Have you seen our sponsor? So far there have been no documented instances of a baby becoming ill due to contamination from a breastpump, but no one has studied the issue. Buying new tubing, new parts, and cleaning every cleanable part does NOT sanitize the motor of the pump, which (in an open system pump) is, by definition, open to the new milk you are pumping. Note that it is NOT possible to completely sterilize the inside of an open system pump – you would have to dismantle the pump to get to all the parts that could be affected, plus some of these parts are impossible to completely sanitize. ![]() A closed system pump has a barrier between the milk collection kit and the pump mechanism to prevent contamination by bacteria/mold/viruses/etc. Open system pumps When you are buying a pump, whether it be new or used, it is important to know whether is has an open or a closed system. Image credit: Jerry Bunkers on flickr Closed system vs.
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