#[ but it was your CPR comment that my brain jump onto this lol ]

[afraidofchange]

Actually, @croftborn got me thinking about what kind of combat-based medical training Shepard would have learned in her time in the Alliance. All soldiers are taught Basic First Aid, (and based on some real-world instructions, they are also trained to address Tactical Casualty Combat Care (TCCC), following and understanding MARCH: Massive Hemorrhage, Airway, Respiration, Circulation, Hypothermia Prevention).

Obviously, medical care in an active combat zone can be difficult, given the danger, but triaging injured persons before accessing professional medical care can certainly help their outcomes. Additionally, we know in Mass Effect that medicine has advanced to the point where medi-gel exists as an "all-purpose medicinal salve", that combines both an anesthetic and clotting agent and is able to heal various wounds and ailments, instantly sealing injuries against infection, while allowing for rapid healing (as the gel grips tightly to flesh until subjected to a frequency of ultrasound, therefore making it sealable against liquids - namely, blood - as well as contaminants and gasses).

However, this is not always going to solve a medical injury in the field, and so Shepard does make use of her training when necessary, for both those who serve alongside her, as well as herself. For example, when Ashley was attacked by the Eva Core bot, she suffered a massive head injury, and while I know the game shows the emotional cinematic of Shepard fireman carrying her to the ship, they definitely should've stabilized her neck and head first and gotten a stretcher to bring her to the Med-Bay, lest they injure her further (among other things, like making sure she still had a pulse and was breathing, etc), especially since they did have a bit of time before more Cerberus soldiers were going to show up / the storm was coming in.

Anyway, my main point of this was that Shepard has these basic skills from her years in the Alliance, and while a lot of minor combat injuries can be treated with medi-gel, actively triaging in the field for more serious injuries is something she can and does do - which I am sure, Dr. Chakwas is thankful for.