The Mistake That Made Me a Doctor

I was a second-year resident when I almost killed a patient. Not through negligence — I was one of the most careful residents in my program, the kind who triple-checked dosages and read every footnote in every uptodate article. I was careful, but I was wrong, and being wrong in medicine can be fatal.

The patient was a fifty-six-year-old woman I'll call Mrs. Davis. She came to the emergency department with three days of fatigue, mild shortness of breath on exertion, and what she described as "just feeling off." Her vital signs were unremarkable. Her physical exam was normal. Her basic labs — CBC, metabolic panel, troponin, chest X-ray — were all within normal limits. The emergency department attending diagnosed her with a viral syndrome and was preparing to discharge her with instructions to rest and hydrate.

I was the medicine resident covering admissions that night. Something about Mrs. Davis bothered me — a quality I've learned to call "the sheen of illness," the subtle, almost imperceptible way that patients who are truly sick look different from those who aren't. I couldn't articulate it then, and I still can't. But I asked the attending if I could admit her for observation overnight. She agreed, reluctantly, with the unspoken message that I was wasting a bed on a patient with a cold.

I examined Mrs. Davis carefully on the floor. Everything was normal. I ordered a few more labs — a D-dimer, a BNP — and went to see my other patients. The D-dimer came back at 11:45 PM. It was normal. I went to sleep in the call room, reassured.

The next morning, I was paged to Mrs. Davis's room. She had developed a fever overnight. Her oxygen saturation had dropped to 88 percent. Her chest X-ray, which had been clear twelve hours earlier, now showed bilateral infiltrates consistent with acute respiratory distress syndrome. She was transferred to the ICU within the hour.

What I had missed was sepsis — early, subtle, hiding behind normal labs and a normal exam, but sepsis nonetheless. The D-dimer that I had ordered as a CYA measure — a test I threw in because I didn't know what else to order — was the wrong test for what she had. A lactate, a procalcitonin, blood cultures drawn before antibiotics: these were the tests I should have ordered. I didn't. I was tired, I was busy, I was reassured by the normal exam, and I made a decision not to investigate further.

Mrs. Davis spent eleven days in the ICU. She survived — barely. I visited her every day, sitting at her bedside while she was sedated and intubated, reading her lab values, watching her vent settings, waiting for her to turn the corner. When she finally woke up, I apologized. I told her what I had missed. She listened, and then she said something I will never forget: "You figured it out. You didn't send me home. You kept me here. That's what matters."

She was being generous. What mattered was that she almost died because I stopped looking. I have never stopped looking since. I order the extra test. I ask the extra question. I stay the extra hour. Not because I'm afraid of being sued — because I'm afraid of being wrong again, and of the patient who won't be as lucky as Mrs. Davis was.