There is an account of a doctor who was called to treat an abbot who fell from his horse and hit his head on the ground.
The unconscious man was taken to a bed where the doctor carefully shaved his hair. This allowed the doctor to easily determine if there were any fractures to the skull, and when it was found that there were no fractures, a wet compress was placed. Furthermore, the abbot was kept as still as possible and fed a solution of sugar dissolved in water that could easily be administered to the unconscious man who had lost the swallowing response.
The (lucky) abbot woke up after three days and, seeing the situation, it’s hard to believe that the doctor could have done anything other than provide this kind of care. If I remember correctly, he limped a little the rest of his life, but all things considered, he did well.
If the abbot hadn’t woken up, they might have tried to make him smell salts to try to bring him back to life.
If he had a skull fracture, it is likely that the doctor would have made incisions in his scalp and begun to remove bone fragments that were in danger of being carried to the brain, a procedure that, although it sounded quite gruesome, was actually common and reasonably common. survivable.
Even with the feeding of sugary solutions, the patients could not be kept alive in the way that we can today with more complete foods being administered through a nasal tube and through the support of artificial breathing apparatus.