One of the most useful things I did when preparing for the oral exam was to write down 'probable' questions. There's a long list of classic questions that come up over and over and over again if you talk to people who've taken the exam.
Peak airway pressure is suddenly up, what do you think?
The patient is unarousable at the end of surgery.
What are your extubation criteria?
Should this patient be beta blocked?
Then actually compose complete but concise answers. Write them down, rehearse them OUT LOUD, and revise them so you don't stutter or trip over the words. It helps if you're talking to another person, but even solo practice is useful.
Likely causes in this patient include a kinked or obstructed endotracheal tube, mainstem intubation, or bronchospasm. Other causes are inadequate depth of anesthesia or increased muscle tone, mucus plug, pneumothorax, pulmonary edema, VAE, aspiration, or foreign body. I would examine the circuit, tube, and patient, listening for bilateral breath sounds, assessing color and O2 saturation, hand ventilating to assess compliance, and suctioning the endotracheal tube. I might also obtain a CXR or perform bronchoscopy.
Delayed emergence may be due to pharmacologic, metabolic, or neurologic issues. Residual volatile agents, opioids, benzodiazepines, cholinergics, anticholinergics, and other medications can cause prolonged sedation. Hypoglycemia, electrolyte abnormalities, hypothermia, and other metabolic derangements. Neurologic problems such as elevated ICP, intracranial bleeding, or seizures may also be responsible.
The patient should be awake, breathing spontaneously, free of residual muscle relaxant or anesthetic agents, and have a low probability of needing to return to the OR in the immediate future. Specific respiratory criteria include a NIF of -20 or better, vc >15cc/kg, RR <35, adequate oxygenation and ventilation.
"It's not absolutely clear who benefits from perioperative beta blockade, when the drugs should be given, how long they should be continued, or who is at highest risk for adverse events such as stroke. In this patient I would proceed with surgery and control her HR intraoperatively with a short acting beta-1 selective agent like esmolol."
These are just a few of what I put together before my exam. I rehearsed these words over and over like I was going to be an actor in a play. The above four questions came up on my exam, and although what I actually said varied a bit to fit the scenario, and I was cut off (repeatedly), it was just second nature to speak the words in a fluid, confident way.
These predictable questions are gimme's that you can rehearse in advance.
There's no substitute for time spent speaking though.