Study on the timing of preoperative fasting and water deprivation in patients receiving fiberoptic bronchoscopy

Objective To compare the effects of different timing of preoperative fasting and water deprivation in patients receiving fiberoptic bronchoscopy(FB).Methods Totally 390 patients receiving FB were divide into two groups.The 200 patients in the experimental group intake 100ml semi-liquid foods,such as rice paste,porridge,steamed bread mixed with water,at 2 hours before bronchoscopy.The 190 patients in the control group intake 250g ordinary foods at 4 hours before bronchoscopy.The incidences of nausea,vomiting,aspiration,dizziness,palpitations as well as vital signs,oxygen saturation and anxiety before and during bronchoscopy were recorded.Results There were no significant differences in the incidences of nausea,vomiting,aspiration,palpitations as well as respiration rate,heart rate and oxygen saturation between the two groups(P0.05).Significant differences were found in the incidence of dizziness and the level of comfort,anxiety,blood pressure between the two groups(P0.05).Conclusion Taking 100ml semi-liquid foods at 2 hours before bronchoscopy is safe and feasible.