Each has its own treatment instructions laid down by committees of doctors known as clinical protocols.

BBC

By 1996, eighty-five per cent of La Crosse residents who died had written advanced directives, up from fifteen per cent, and doctors almost always knew of and followed the instructions.

NEWYORKER: Letting Go

Instructions are written in jargon that may be second nature to doctors, but is incomprehensible to their patients.

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The next morning Sorrel persuaded doctors to let Josie drink, but then one doc ordered heavy-duty narcotics against another's instructions.

FORBES: Fixing Hospitals