I think you're putting a little too much stock into the accuracy of your clinical exam. There are plenty of patients with ischemia/perforation who don't manifest a perfect combination of fever/leukocytosis/acidosis with signs of peritonitis.
Don't need a perfect combination in the garden variety SBO patient. There are populations where the exam is challenging: obese (as you mentioned), demented/elderly, the intubated, psych patients, the immunosuppressed, etc. You always have the CT scanner if you're not sure. I'm not against it, I just don't think it should be the default.
You say mass and intussusception are too rare to matter, but I put etc etc because there are a million things you can find in there you weren't expecting....when you add them all together, they're more common than you think. Perfect example: Abscess and associated ileus, no SBO.
A million things? Come on, man. We're going to have to agree to disagree on that point. Abscess is a special case. You should have some suspicion without a CT scan...and if I did, I'd get a scan because it might be perc drainable--perfed appy being the most likely culprit.
As for microperforation, I've seen it several times, but I guess since I get CT scans and you don't, that difference in experience can be easily explained. Plain films are just not good for identifying free fluid or small to moderate amounts of air.
We unfortunately get scans routinely as they are ordered before we are consulted and some of my colleagues insist on them, further perpetuating the problem. I'm sure there were some rare instances that the scan changed management but on the whole they didn't.
Different patients and different pathologies require individualized therapy.
Couldn't agree more. That's why I'm against the notion of scanning all SBO's.
I'm not sure I can subscribe to the simplistic, cookbook approach of "NGT x 48 hours, then OR if they don't progress." Since I want to operate on some right away, and I want to sit on some other ones for as long as humanly possible, I use the CT to guide my therapy.
Actually, I'm advocating the opposite of a cookbook approach--evaluation of the clinical information at hand, NGT, observation and if indicated selective use of CT.
...I've found that there's not always a great relationship between the physical exam and degree/severity of underlying pathology. Often times, the hands and the CT disagree.
We'll have to agree to disagree on that point. When the clinical picture and CT disagree I go with the clinical picture. I've been consulted for ominous findings on CT on more than one occasion in a patient with no complaints or clinical abnormalities. Hard to make a well patient better with an operation.
Anyway, I think it's okay to have differing opinions. My opinion is that it's $2,000 well spent, since it guides my therapy...and I think it can ultimately lead to a cheaper hospital stay for a good portion of patients.
Agree with it being ok to have differing opinions. However, cost isn't the only concern: radiation and contrast exposure are getting more attention.