Medical Encyclopedia

O2 saturation (pulse oximetry, oxygen saturation)
OGTT (glucose tolerance test, oral glucose tolerance test, GTT)
obstetric sonogram (pregnancy ultrasound, transvaginal ultrasound, also known as TVUS, first trimester ultrasound, obstetrical ultrasound, pelvic ultrasonography in pregnancy, obstetric ultrasonography)
obstetric ultrasonography (pregnancy ultrasound, transvaginal ultrasound, also known as TVUS, first trimester ultrasound, obstetrical ultrasound, pelvic ultrasonography in pregnancy, obstetric sonogram)
obstetrical ultrasound (pregnancy ultrasound, transvaginal ultrasound, also known as TVUS, first trimester ultrasound, pelvic ultrasonography in pregnancy, obstetric sonogram, obstetric ultrasonography)
oil retention enema (enema, fleets enema, soapsuds enema, sodium phosphate enema, saline enema)
open heart surgery (intracardiac surgery)
open procedure for an enlarged prostate gland (simple prostatectomy, simple prostatectomy for BPH)
open reduction and internal fixation of a hip fracture (hip pinning, surgical pinning of the hip)
oral glucose tolerance test (glucose tolerance test, OGTT, GTT)
oral hygiene (dental hygiene)
orchidopexy (undescended testicle repair, orchiopexy)
orchiopexy (undescended testicle repair, orchidopexy)
orotracheal intubation (intubation, endotracheal intubation, nasotracheal intubation)
oxygen saturation (pulse oximetry, O2 saturation)