Background: The aim of this post hoc analysis of a large cohort study was to evaluate the association between night-time surgery and the occurrence of intraoperative adverse events (AEs) and postoperative pulmonary complications (PPCs). Methods: LAS VEGAS (Local Assessment of Ventilatory Management During General Anesthesia for Surgery) was a prospective international 1-week study that enrolled adult patients undergoing surgical procedures with general anaesthesia and mechanical ventilation in 146 hospitals across 29 countries. Surgeries were defined as occurring during 'daytime' when induction of anaesthesia was between 8:00 AM and 7:59 PM, and as 'night-time' when induction was between 8:00 PM and 7:59 AM. Results: Of 9861 included patients, 555 (5.6%) underwent surgery during night-time. The proportion of patients who developed intraoperative AEs was higher during night-time surgery in unmatched (43.6% vs 34.1%; P<0.001) and propensity-matched analyses (43.7% vs 36.8%; P¼0.029). PPCs also occurred more often in patients who underwent night-time surgery (14% vs 10%; P¼0.004) in an unmatched cohort analysis, although not in a propensity-matched analysis (13.8% vs 11.8%; P¼0.39). In a multivariable regression model, including patient characteristics and types of surgery and anaesthesia, night-time surgery was independently associated with a higher incidence of intraoperative AEs (odds ratio: 1.44; 95% confidence interval: 1.09e1.90; P¼0.01), but not with a higher incidence of PPCs (odds ratio: 1.32; 95% confidence interval: 0.89e1.90; P¼0.15). Conclusions: Intraoperative adverse events and postoperative pulmonary complications occurred more often in patients undergoing night-time surgery. Imbalances in patients' clinical characteristics, types of surgery, and intraoperative management at night-time partially explained the higher incidence of postoperative pulmonary complications, but not the higher incidence of adverse events. Clinical trial registration: NCT01601223.

Background:Anxiety is a common preprocedural problem and during processing especially in interventional medical processes.Aim:Aim of this study was to assess the level of anxiety in patients who will undergo upper gastrointestinal endoscopy and coloscopy.Methods:Five hundred patients scheduled to undergo sedation for elective upper gastrointestinal endoscopy and colonoscopy were studied. Beck Anxiety Inventory (BAI) was administered to each patient before brought to the endoscopy room. Demographic data of patients were collected.Results:BAI scores and anxiety levels were significantly lower in; males compared to females, patients with no comorbidity compared to patients with comorbidity (both P values < 0.001). BAI scores were significantly lower in patients educational status university and upper compared to patients educational status primary-high school (p=0.026). There were no significant difference between BAI and anxiety levels compared to procedures (Respectively, P=0.144 P=0.054). There were no significant difference between BAI scores and anxiety levels compared to age groups (Respectively, P=0.301 P=0.214).Conclusions:We think that level of anxiety in patients who will undergo upper gastrointestinal endoscopy and colonoscopy was effected by presence of comorbidities and gender but was not effected by features such as age, procedure type and educational status.

Objective: In this study, the aim was to investigate the effect of hyoscine N-butylbromide (HnBB) pretreatment on pain during propofol injection. Subjects and Methods: In this prospective, randomized, placebo-controlled and double-blind trial, 60 patients scheduled to undergo routine outpatient surgery under general anesthesia were randomly allocated to 2 groups, the HnBB (n = 30) and sodium chloride (n = 30) groups. Twenty seconds after the injection of 20 mg HnBB or 0.9 % sodium chloride, a 50-mg dose of propofol was injected in 2–3 s. Ten seconds later, the pain intensity was assessed using a 4-point scale: no pain (0), mild (1), moderate (2), and severe (3) pain. The Student t test was used for the analysis of parametric data and the Pearson χ² test for categorical data. Results: The occurrence of pain in the HnBB group (43.3%) was significantly lower than the control group (73.3%) (p < 0.018). Of the 30 patients in each group, 10 in the control group and 3 in the HnBB group experienced severe pain (p = 0.001). Conclusions: Pretreatment with 20 mg HnBB significantly reduced propofol injection pain compared to placebo.

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