Winnie writes:
I have never understood this argument, other than the fact that it comes
from the competing manufacturer.  Since the pump "sucks" rather than "blows"
through the tubing, how can organisms be "blown" through the tubing into the
collection bottle?


Winnie - 

The idea of the milk getting into the motor can seem far fetched when you
think about the liquid going down into the bottle from the breast.  

As you watch a PNS work, you will notice that it creates vacuum in the
tubing.  When the vacuum is created in the tubing, the breast is pulled into
the shield past the tubing.  

Because there is vacuum created, the liquid can be pulled into the tubing
and get sucked into the motor.  Because of the construction, this is an
unlikely scenario unless the mom has a very fast MER or she is not cleaning
the valves & membranes well and they stick together.

The more common scenario is when there is vacuum created over liquid, the
drop in pressure causes it to be turned into an aerosol and that aerosol can
travel into the tubing and therefore the motor.  Once there is milk in the
tubing/motor it is contaminated.

As long as only one mother is using the pump, they are all her
bacteria/viruses.  It is safe for her to use as long as she needs it, like
using her own toothbrush and then putting it away for weeks or months and
using it again.  All the germs are hers.  When sharing the pumps, the milk
can be contaminated with the other mother's germs, like sharing a
toothbrush.

I hope this clarifies the situation.  BTW, I have no allegiance to ANY pump
company (only to technology that works for a particular mom!)

llp

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