Under ideal circumstances, I'd really prefer having my health care provider do this, but in an emergency it might not be a bad idea to have one of these on hand.
I did some research and it seems that the staples typically stay in for 10 to 14 days, depending on the location of the wound. A special tool is used to remove them.
Common sense disclaimer, I'm not a health care professional. Anything you choose to do is at your own risk.