[QUOTE=gonzomax]
Couldn,t computers be used to diagnose. Plug in the symptoms and you get whittled down to a tiny list of options. There must be programs to do it by now.
[/QUOTE]
They might, IF humans had more single-disease only symptoms. Seriously, the doctor barely hears you when you say “headache” or “shortness of breath”, because EVERYTHING under the sun causes those. If something would be nice and simple like “Cooties varr., and nothing else, causes your index finger to become purple”, then any idiot could diagnose Cooties varr.
But IRL, you have people reporting SOB, chest congestion, wheezing and coughing. It is a chest cold (treat symptomatically), chronic asthma (treat with steroids), bronchitis, bacterial (treat with antibiotics), bronchitis, viral (treat symptomatically), or congestive heart failure (get in the hospital bed now)?
Even worse, people suck at giving their medical history. Even if they aren’t outright trying to lie to cover something up, they just suck at it. 9 times out of 10, when I take a health history, I ask, “Ever been hospitalized?” “No.” “Any major illnesses?” “No.” Then I get to the section on childhood illnesses: “Ever had tonsilitis?” “Oh, yeah, all the time! I missed school like twice a month for it every year until they took them out when I was 12.” Excuse me? You had your tonsils removed NOT in a hospital? Someone just scooped 'em out in your bathroom, maybe? When they’re missing large data points like this, you just know they’re missing small important ones, as well. Hell, denial being what it is, half the time they ignore symptoms and forget about them, or won’t report them for fear of sounding like a hypochondriac and being dismissed.
A good doctor knows what questions to ask to get as much of the real story out of a patient as possible. He’ll rephrase things and ask the same things three different ways to get to the truth of the matter. While it’s theoretically possible a computer could do that, I’ve stumped that online 20 Questions game plenty. I don’t want something that can’t guess “baby bottle” in 25 tries being in charge of my diagnosis and treatment.