Re: Strange things happening to fingers… Home › Forums › Living with type one › Strange things happening to fingers… › Re: Strange things happening to fingers… 7 November, 2012 at 9:19 am #14391 lizzParticipant It works fine, in fact one good thing with it is the pump cannula never blocks. But it has a slower action than all artificial insulin and human insulin as it hasn’t been changed in any way.