1	Rehydration Solutions/
2	Isotonic Solutions/
3	fluid therapy/
4	crystalloid.mp.
5	fluid*.tw.
6	hydrat*.tw.
7	rehydrat*.tw.
8	isotonic solution*.tw.
9	((ringer* or isotonic or salt) adj2 solution*).tw.
10	salt solution*.tw.
11	or/1‐10
12	exp Administration, Intravenous/
13	iv.tw.
14	"i v".tw.
15	intravenous*.tw.
16	or/12‐15
17	((randomized controlled trial or controlled clinical trial).pt. or randomized.ab. or placebo.ab. or clinical trials as topic.sh. or randomly.ab. or trial.ti.) not (animals not (humans and animals)).sh.
18	"Postoperative Nausea and Vomiting"/
19	postoperative complications/
20	ponv.tw.
21	(exp postoperative care/ or postoperative care.tw. or recovery.tw. or exp "perioperative period"/) and (nause* or vomit* or emesis or emeses or emet* or queasiness or queasy).tw.
22	(("post operative" or postoperati* or perioperative or "peri‐operative" or surger* or surgical* or postsurg* or intraoperative or anesthe* or anaesthe* or postanesthe* or postanaesthe*) and (nause* or vomit* or emesis or emeses or queasiness or queasy)).tw.
23	or/18‐22
24	11 and 16 and 17 and 23