Completely agree - practicing on my own, I find there are only a few specific instances in which a pelvic helps decision making. The dogmatic "all female pain below the umbilicus needs a pelvic," that I was taught in residency, is wrong.
I find it useful in:
- Women who are bleeding heavily (i.e. look sick) to get a sense of how much blood there really is.
- Later first trimester / second trimester miscarriage where I may need to remove products from the vagina or os.
- Suspected PID to check for CMT and to obtain cultures.
- Might be missing another example or two.
I don't find it useful in:
- The VAST majority of early first trimester pregnancies with spotting or vague abdominal pain (i.e. acute ultrasound deficiency).
- Evaluating for ovarian cysts or adnexal masses.
- Vaginal discharge (will simply treat if story is good).
- Differentiating gyn vs non-gyn abdominal complaints.
Maybe I'm going too far, but I also don't generally find pelvic US helpful in the non-pregnant patient. CT can see most cysts, and honestly, if a CT doesn't show surgical pathology, I don't believe that a pelvic US adds much diagnostically. Of course, I use it with doppler to evaluate for (not exclude) torsion, but this is only in patients who I'm already concerned about clinically. As we all know, pelvic US has poor sensitivity and can't rule out torsion.