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Table III

Korttila scale (PONV).

Criteria PONV stage
Absence of any emetic episodes and nausea Absence
1) Patient has had only mild nausea
2) An emetic episode or nausea of short duration (10min), regardless of severity, occurred but was triggered by an exogenous stimulus (e.g, drinking, eating, or moving). After this event, nausea decreased and the patient felt well during the postoperative observation period. No antiemetic medication was required
1) Patient had one or two emetic episodes or moderate to severe nausea without exogenous stimuli.
2) Patient required antiemetic treatment once
The patient has had more than two episodes of emesis or nausea (moderate or severe). Administration of at least one antiemetic medication was required. Severe

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