Fig. 1From: Plasma substance P concentrations in patients undergoing general anesthesia: an objective marker associated with postoperative nausea and vomitingPlasma substance P concentrations in patients with and without postoperative nausea and vomiting (PONV). Calculated means at baseline before anesthesia, at the end of surgery, and 24 h after surgery were 607, 414, and 579 pg/mL, respectively for PONV(-) and 773, 631, and 879 pg/mL, respectively for PONV (+)Back to article page