background：Smoking is known to be the risk factor of the peri-operative complications. And pre-operative smoking cessation is suggested. In this study, we evaluated the influence of smoking on peri-operative com-plications in gastrectomy.
methods：The subjects were 103 patients who underwent gastrectomy in our institution between June 2010 and December 2012. Patients were classified into two groups based on their smoking histories, and we analyzed the peri-operative complications between the two groups. Furthermore, the group with smoking history was classified into two groups in having the duration of smoking cessation, then we studied the peri-operative complications.
results：In the 103 patients, 54 patients had smoking histories and, 49 patients didn’t have smoking histo-ry. The incidence of post-operative pulmonary complications among the group having smoking history is sig-nificantly high (p＜0.05). In the group having smoking history, 31 patients had the duration of smoking cessation (57.4%). The inci-dence of post-operative pulmonary complications among the smokers is significantly high (p＜0.05).
conclusion：The risk of post-operative complications significantly decreases by the pre-operative smoking cessation. We think that it is important for surgeons to promote the instruction of pre-operative smoking cessation more positively, if the gastrectomy is decided.

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This study aimed to capture actual situations due to passive smoking by measuring urine cotinine values and discussing relationships between places and opportunities of passive smoking. There were 186 participants, university students and community living people, recognized passive smoking. Analyzed data were urine co-tinine values, examined between 2009 and 2012, and Kano Test for Social Nicotine Dependence Ver.2.1 (KTSND v2.1), gathered from 34 participants in 2011 and 2012 to compare pre- and post- notification of their urine cotinine values. As a result, urine cotinine was detected from 93% of the participants, indicating 7.2 ng/ mgCr as the mean value. Urine cotinine values were significantly higher among the groups: whose family mem-bers smoked in living rooms and whose working places had separate areas for smokers and non-smokers. Partic-ipant numbers, choose the non-smoking section in restaurants and kept away from smokers when smokers were close to them, were slightly increased. In this study, participants’ avoidance behaviors for passive smok-ing were increased by notification of urine cotinine values. It was suggested that notification of urine cotinine values would be an effective mean to visualize harm of passive smoking because passive smoking caused imperceptible subjective symptoms.

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