According to the research findings esophagogastroduodenoscopy practice comprises general anesthesia, indications and contraindications, techniques, as well as requirements. Although the practice is associated with minimal adverse effects over, it is uncomfortable and has several complications as well as risks. This medical routine is performed by a proficient medical practitioner in esophagus and gastro-system surgeries. It is normally done as a way of treating symptoms that are related to the upper gastrointestinal tract. Recent studies noted with great concern that EGD may cause several complications, including stomach perforations, and peptic ulcers as post-operation side-effects. Other complications are related to contaminated equipments, topical anesthetics and sedation, as well as cardiovascular complications. Therefore, it is important to improve the procedure in the attempt to eliminate or minimize these complications. Esophagogastroduodenoscopy normally ascertains whether a patient needs treatment before the surgery is performed. It is an essential technique for treating endoscopic varicose in Cirrhosis patients, and making a diagnosis of various abnormalities of the upper gastrointestinal tract. It is normally used as a form of radiological study. Upper endoscopy helps in evaluation of symptoms of nausea, difficulty in swallowing, vomiting or persistent upper abdominal pain. Further, advantages that accrue from EGD necessitate its procedural consideration. It is the utmost method used to figure out the source of hemorrhage from the upper section of the gastrointestinal tract. In addition, it is more precise with higher performance in the detection of inflammation as well as tumors and ulcers of the duodenum, esophagus and stomach compared to X-ray. A2c. Explanation The practice of pre-operative upper endoscopy has been in existence for several decades in surgical practice. It is an essential component and procedure in evaluating a preoperative procedure for bariatric surgery. In current surgical practice, EGD is used to treat and evaluate symptoms of the upper gastrointestinal tract characterized by pain in the chest or upper abdomen, gastro esophageal reflux disease, difficulty swallowing, bleeding from the upper intestinal tract and related anemia, black stools or heartburn, and regurgitation among other indications. It may also to identify enlarged veins (called varicose veins) in the walls of the lower section of the esophagus, take samples for biopsy use, or ascertain abnormalities discovered by other diagnostic processes. This practice is used in surgical procedure since it provides better, more clear and detailed information that are used in surgical practice. It enables treatment without necessary conducting a surgery through the endoscope, biopsy forceps and other instruments (Cohen, 2011). A3. Reference List Aymaz, S., Krakamp, B., Kirschberg, O., & Lefering, R. (2010). Comparability of localization data in transnasal and transoral esophagogastroduodenoscopy. BMC Gastroenterology , 10 (116), 1-5. Cohen, J. (2011). Successful training in gastrointestinal endoscopy. Chichester: John Wiley & Sons. Mayeaux, E. J. (2009). The essential guide to primary care procedures. Philadelphia: Lippincott Williams & Wilkins. Talley, N. J., DeVault, K. R., & Fleischer, D. E.