80-100: Trivial injuries, don't really need to be in the medbay.
60-79: Minor Injuries. Some cuts and gashes that are bleeding a little bit, surface shrapnel, micro fractures, and first degree burns. Nothing too serious.
40-59: Moderate injuries. Deeper cuts and gashes which will be bleeding a fair amount, shrapnel you'll need to dig to remove, fractures, and 2nd degree burns.
20-39: Severe wounds. Major cuts and gashes which will be bleeding enough to warrant medical bags. Deep, big shards of shrapnel, major fractrures, and 3rd degree burns.
10-19: Worst you can be and have a good chance of survival. Organ damage, limb loss, Major fractures, Large burn areas, and heavy bleeding. They'll need major surgery to be stabilized.
2-9: You should be dead, but a MED can attempt to save you through surgery, though you have a high chance of death still.
0-1: You're a bloody smear on the floor, no chance of survival

One more thing to mention on 2-9s, Only NCO's and higher along with special personnel can receive this surgery, if it's a whiteshield you gotta give them the Emperor's peace.

Everything was good except for one or two things. If a roll is between 59 and 20, you should administer morphine lest they risk going into shock, which will cause even more problems. And this one isn't your fault, I forgot to tell you, but for skilled actions such as suturing, removing limbs, cauterization and the like, you'll need to roll.

Also if a puncture wound is deep enough, it helps topack it with gauze or something similar to help control bleeding as well, and prevent abscesses from forming, so it heals from the bottom up

Always put on surgical gloves

Make them roll for how effective the morphine is