Preoperative Fasting

Children are asked to fast before anaesthesia to reduce the amount of material remaining in the stomach. Prolonged fasting can cause hunger, thirst and discomfort. Although shorter fasting intervals have been introduced for clear fluids and breast milk, less is known about how quickly a light yoghurt breakfast leaves the stomach. Yoghurt differs from clear fluids in its nutrient content and semi-solid consistency. The primary aim of this study is to compare gastric emptying after three versus four hours of fasting following yoghurt intake in 24 children aged 1 to 10 years undergoing elective upper gastrointestinal endoscopy under anaesthesia at Baskent University Faculty of Medicine Ankara Hospital. Children will be randomly allocated to two equal groups. They may eat yoghurt freely up to a maximum of 150 g; there is no prescribed fixed or weight-based dose, and the amount actually eaten will be recorded. Ultrasound will assess stomach contents at the assigned fasting interval. If the stomach has not emptied according to the study criterion, the assessment will be repeated at 10-minute intervals before proceeding with anaesthesia. Gastric contents will also be assessed directly during endoscopy. The clinicians performing ultrasound and endoscopy will not know the assigned group; the anaesthetist will know it. The primary outcome is the proportion of children with an empty stomach at the first ultrasound assessment, compared between the three-hour and four-hour groups. The primary hypothesis is that a three-hour interval after yoghurt intake will yield a similar proportion of empty stomachs to a four-hour interval. Secondary outcomes include estimated gastric volume, endoscopic findings, hunger, and agreement between ultrasound and endoscopic assessment.

This retrospective observational study aims to evaluate the relationship between preoperative fasting duration and gastric residue in pediatric patients undergoing upper gastrointestinal endoscopy for gastrointestinal symptoms or pathology. The study will assess the associations between gastric residue, gastrointestinal symptoms, underlying gastrointestinal diseases, and endoscopic findings. Data will be retrospectively collected from hospital records, anesthesia records, and endoscopy reports to investigate whether prolonged fasting duration reliably predicts an empty stomach in pediatric gastrointestinal patients.

This single-center quality improvement project evaluates preoperative fasting times before elective procedures requiring anesthesiology care. The project aims to reduce prolonged fasting for clear fluids by implementing a local standard operating procedure (SOP) allowing patients to drink clear liquids until being called to the operating room ("drink until called"), supported by staff education and fasting instruction cards. Fasting times and selected perioperative outcomes will be assessed before and after implementation.

During the preoperative preparation process, the fasting period for anesthesia is planned according to guidelines. According to standard guidelines, a fasting period of at least 2 hours is recommended for clear liquids, at least 6 hours for light meals, and at least 8 hours for a full meal. However, it has been reported that these guidelines are valid for healthy patients. It is thought that the planned fasting periods may vary in diabetic patients due to delayed gastric emptying. This study aims to calculate gastric volume under ultrasonography guidance and compare it with fasting time.

The goal of this clinical trial is to determine whether a preoperative oral carbohydrate-rich clear drink can improve recovery in women undergoing elective cesarean section under neuraxial anesthesia. The main outcomes it aims to answer are: Primary Outcome: Does the carbohydrate drink improve ObsQoR-10 scores at 24 and 48 hours postoperatively? Secondary Outcomes: Does it reduce patients' hunger, thirst, and anxiety levels? Researchers will compare patients receiving a 400 ml oral carbohydrate-rich clear drink 2 hours before surgery (Group A) to those receiving 400 ml distilled water (Group B), to assess differences in recovery and comfort. Participants will: Be randomized into two equal groups (n=50 each) using a computer-generated randomization table Receive standardized anesthesia and postoperative analgesia

The purpose of this study is to investigate whether time-restricted feeding, a form of intermittent fasting, before surgery improves insulin resistance around the time of surgery, compared to carbohydrate drinks and standard fasting before surgery.