An intern stopped me in a stairwell in November and asked how long a person stays this tired. Being tired doesn’t take what you know. It takes the walk back down the hall to somebody you already decided about, and you won’t feel it go.

A liter of fluid will raise almost anyone's blood pressure for a while, which is exactly the problem with it. An attending's walkthrough of postoperative hypotension: how to tell a real number from a cuff artifact, what perfusion looks like under your hand, why the bolus is a test rather than a gesture, and what a transient responder is telling you.

The day team leaves, and nineteen patients you didn't operate on are yours until morning. An attending's guide to surgical cross-cover: sorting the page from the workroom, reading the trend instead of the number, treating the nurse's read as data, getting to the doorway before the chart, and calling your senior before you're comfortable. Night float has never been a knowledge test. It's a triage problem with a phone attached.