You can improvise most basic medical instruments, allowing you to perform rudimentary surgeries without a medical kit. You can use the Medicine skill to treat deadly wounds without a basic medkit or to provide long-term care to a single patient without an advanced medkit. If you have a basic medkit, you gain a +1 insight bonus to Medicine checks to treat deadly wounds. If you have an advanced medkit, you gain a +2 insight bonus to Medicine checks to treat deadly wounds, and any temporary medical lab you establish using an advanced medkit acts in all ways as an actual medical lab. If you attempt a Medicine check that normally has its DC set by what equipment you use, you use the DC of a basic medkit, or an advanced medkit if you are 5th level or higher.