WAIT.you do not need to pump & dump. I am both a nurse and Lactation Consultant...we have moms at our hospital that get their tubals come back to the floor and nurse their babies...30 minutes post surgery. It is a common misconception with anesthesia you have to pump&dump...but that is not fact based. Once you are awake and aware there is not enough anesthesia in you to cause any problems. I would recommend pumping right before surgery for comfort and in case you are uncomfortable after surgery and CHOOSE not to nurse. NOW, since she eats every 11/2 -2 hours...which is NORMAL for some breastfed babies, then you might want to pump a few extra times in case you miss a feeding during the tubal. So, I would recommend that you-over a course of a few days- pump after a few feedings...put the leftovers away to speak:)- then once right before surgery. Then you will have plenty stored up for a couple of feedings...2-4 ounces in bottle. Your volumes may be low when pumping after a feeding, but is really high in fat...cheescake dessert if you will:), and you can pool all those together in the fridge.
Good luck and hope the correct information helps you out!C.