Linda Pohl (an IBCLC and professional engineer) researched this a few 
years ago, and found dangerous suction pressures in hospital grade pumps 
used with the incorrect brand of kit.

Each of the major manufacturers carefully calibrates the air space in 
their kits to the amount of air their pump moves to allow safe and 
effective suction pressures at the nipple. The kits are not 
interchangeable, as you observed.

I hope you have the authority to correct this dangerous advice on the 
part of the hospital's CLEs, and perhaps ensure that they did not learn 
such a thing in their training course (and get correct information to 
the instructors if they did).

Catherine Watson Genna, IBCLC  NYC

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