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Tag Jeffrey L. Johnson MD FACS

Bariatric Surgery

1 My patient weighs 250 lb (114 kg). Is he or she morbidly obese? Maybe. The most widely used definition of morbid obesity uses the concept of body mass index (BMI), which is weight (kg) divided by height squared (m).…

Mechanical Ventilation

1 Why do patients need mechanical ventilation? There are three basic categories of need when it comes to mechanical ventilation (MV): (1) inadequate respiratory drive; (2) inability to maintain adequate alveolar ventilation; and (3) hypoxia. The decision to provide MV…