Harriet Lane Handbook
- Observer-expectancy bias
- Obstruction, lower urinary tract
- Obstructive disease, spirometry and lung volume readings in
- Octagam, preparations for
- Odds ratio (OR)
- Oil of wintergreen odor, in toxicology
- Oligochromosomal microarray
- Olmesartan
- Olsalazine (Di-5-ASA, Di-mesalazine, Dipentum)
- Omalizumab, for asthma
- Omphalocele, gastroschisis vs.
- Onchocerciasis, ivermectin for
- Oncologic conditions, genetics and
- Oncologic emergencies
- One-sample (paired) t test
- One-tailed tests
- Ophthalmic agents
- Ophthalmic conjunctivitis, treatment of
- Ophthalmologic examination, follow-up
- Opiate-induced pruritus, naloxone for
- Opiate intoxication, naloxone for
- Opioid withdrawal, signs and symptoms of
- Opium tincture (deodorized tincture of opium)
- Opportunistic disease, treatment of
- Oral allergy syndrome
- Oral azithromycin, for neonatal exudative conjunctivitis
- Oral contraceptive pills (OCPs), combined hormonal
- Oral food challenges
- Oral glucose tolerance test (OGTT)
- Oral griseofulvin, for fungal infections
- Oral intercourse, screening guidelines by
- Oral leukotriene inhibitors
- Oral regimen, for tapering
- Orange juice
- Orbital floor fractures
- Organ donation
- Organic acidemias
- Organophosphate poisoning, pralidoxime chloride for
- Organophosphates
- Ornithine transcarbamylase (OTC) deficiency
- Oropharyngeal airway
- Orthostatic proteinuria
- Osmolal gap, calculation of
- Osmotic diarrhea
- Osmotic laxative, for constipation
- Osteochondroma, sessile
- Osteogenesis imperfecta
- Osteoid osteoma
- Overgrowth, genetics and
- Overpowered study
- Oxygenation
- Oxygen challenge test
- Oxygen delivery systems
- Oxygen mixture, for croup
- Oxygen therapy, for newborns
- Oxyhemoglobin dissociation curve