Yes they can a little known thing is that that would probably help you because they make two different ones a 20ml and a 40 ml the batteries have come a long way from my first the pump is almost half the size it was when I got my first one so yes you should be able with out anymore problems the only thing is the girdle they put on you after surgery it’s only two weeks and if the pump is working you should be feeling better before you leave the hospital good luck