Kathleen,
I have a lovely photo of a nasty wound from excessive pressure in an over the
counter pump.  The ironic thing is the mom developed mastitis as well because
the pump was ineffective.  I advise my moms to return such torture devices to
the place of purchase and make a loud scene about their injuries if their
money is not immediately refunded. I feel if enough of these things come back,
the companies will start to take notice.
Catherine Watson Genna, IBCLC