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Definition of op. 1  1 chiefly US : a set of planned actions for a particular purpose âusually plural military ops [=operations] 2  2 : op art. 3  3 British, informal : a medical operation â see also photo op.
Peri-op care is the care that is given before, during and after surgery. It takes place in hospitals, in surgical centers attached to hospitals, in freestanding surgical centers or health care providers' offices.