Just to add to all these wonderful comments: critical care medicine and the intensive care unit (ICU) were modeled after anesthesia, and not internal medicine (as i used to think).
When you’re hospitalized, the nurses and doctors usually check your vitals at a regular interval. If you’re fairly healthy, they’ll check on you maybe once every 4 or 8 hours. If you just got out of operation or are somewhat sketchy, they’ll check on you hourly. If you’re really unstable, they might check on you every 15 minutes. Anesthesia will check on your blood pressure every 5 minutes at minimum, they have you continuously hooked to an ecg and pulse oximeter and even if they aren’t looking at the monitor, they can tell by the pitch and frequency of beeps if you’re getting enough oxygen or if your heart is being erratically.
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