If you want to chance opening the bator and opening up the egg a little you can put cornstarch on the vein and hopefully stop the bleeding. I have saved a few that way.
One of my lavender silkie chicks had pipped the vein and I thought for sure that one was a goner due to the amt of blood, but since I wanted lav silkies bad- I did the naughty and opened the bator and peeled the shell a little to visualize the vein and put some cornstarch on it and it worked! I did another one since then and it turned out okay too. I don't know it it will always work but if it is bleeding really bad then its worth a try especially if they are gonna die anyways. It also works on the chicks with the really bloody, actively bleeding umbilicus- just dab a little on the umbilicus. Sometimes you have to do it a couple times to get active bleeding to stop.
P.S. Happy Bday Vickie!!
~Merry Christmas Marans folks!~