• Yoshimasa Oyama, Hideo Iwasaka, Keisuke Shiihara, Satoshi Hagiwara, Nobuhiro Kubo, Yutaka Fujitomi, and Takayuki Noguchi.
• Department of Anesthesiology and Intensive Care Medicine, Oita University Faculty of Medicine, Oita, Japan. oyama@oita-u.ac.jp
• Middle East J Anaesthesiol. 2011 Oct 1;21(3):375-83.

PurposeIn order to enhance postoperative recovery, preoperative consumption of carbohydrate (CHO) drinks has been used to suppress metabolic fluctuations. Trace elements such as zinc and copper are known to play an important role in postoperative recovery. Here, we examined the effects of preoperatively consuming a CHO drink containing zinc and copper.MethodsSubjects were 122 elective surgery patients divided into two groups (overnight fasting and CHO groups); each group was further divided into morning or afternoon surgery groups. Subjects in the CHO group consumed 300 mL of a CHO drink the night before surgery, followed by 200 ml before morning surgery or 700 ml before afternoon surgery (> or =2 hours before anesthesia induction). Blood levels of glucose, nonesterified fatty acids (NEFA), retinol-binding protein, zinc, and copper were determined.ResultsOne subject in the CHO group was excluded after refusing the drink. There were no adverse effects from the CHO drink. NEFA levels increased in the fasting groups. Although zinc levels increased in the CHO group immediately after anesthesia induction, no group differences were observed the day after surgery.ConclusionPreoperative consumption of a CHO drink containing trace elements suppressed preoperative metabolic fluctuations without complications and prevented trace element deficiency. Further beneficial effects during the perioperative period can be expected by adding trace elements to CHO supplements.

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