The Difference in Carbon Footprint Between Diagnostic Upper GI Endoscopy in Dyspeptic Patients Versus Therapeutic Upper GI Bleeding

Carbon Footprint in Upper GI Endoscopy, Dyspepsia, Non-variceal Upper Gastrointestinal Bleeding

Carbon footprint, Upper GI endoscopy, EGD, Dyspepsia, Non-variceal upper gastrointestinal bleeding

The goal of this observational study is to learn about the carbon footprint produced from diagnostic upper GI endoscopy in patients with dyspepsia and therapeutic upper GI endoscopy in patients with non-variceal upper GI bleeding. The main question it aims to answer is: • How much carbon footprint is generated from upper GI endoscopy Participants are already receiving diagnostic and therapeutic upper GI endoscopy as part of their regular medical care for dyspepsia and non-variceal upper GI bleeding, respectively. The carbon footprint generated from this treatment process is examined.

Healthcare systems are a significant source of greenhouse gas (GHG) emissions. Gastrointestinal endoscopy accounts for the third largest share of GHG emissions among hospital services, after anesthesiology and intensive care units. Upper GI endoscopy is commonly indicated for diagnostic purposes, such as dyspepsia, or for therapeutic purposes, such as upper GI bleeding. Carbon footprint is defined as the total amount of GHG emissions over the life cycle of a service or product. Prior studies have primarily estimated the overall footprint of endoscopy, often including indirect sources such as patient transportation, rather than direct emissions. To date, no studies have compared the carbon footprint between diagnostic and therapeutic upper GI endoscopy. This study aims to provide a detailed assessment of the direct carbon footprint generated by endoscopic procedures. We hypothesize that therapeutic endoscopy for upper GI bleeding has higher carbon emissions due to longer procedure time, greater energy consumption, and increased use of disposable equipment compared to diagnostic endoscopy for dyspepsia. This study is an observational study looking at patients with dyspepsia and peptic ulcer bleeding coming to receive diagnostic and therapeutic upper GI endoscopy, respectively. Patients coming to receive an upper GI endoscopy at King Chulalongkorn Memorial Hospital and Sawanpracharak Hospital, Thailand, who are under the inclusion criteria, are asked to get enrolled in the study and have their data recorded. Without any intervention, they will be treated with the standard treatment and investigation for their conditions. The timeframe for patient enrollment is two months. The carbon footprint produced was calculated from medical equipment and medication used, energy consumption, and equipment reprocessing. The carbon footprint produced was calculated from when the patient entered the endoscopy center until they left the endoscopy center. Patients with peptic ulcer bleeding will either get treatment with a bipolar hemostasis probe, a hemostasis clip, or argon plasma coagulation. Epinephrine injection can also be used as an adjunctive treatment. The success rate and complications after treatment in patients with peptic ulcer bleeding will be recorded by follow-up at 72 hours and 30 days after the procedure. The data recorded in this study are age, height, weight, underlying diseases, history of alcohol consumption, history of smoking, duration of endoscopic procedure, types and locations of peptic ulcer (if any) according to Forrest classification, and the success rate of bleeding stoppage. These data will be used to calculate the carbon footprint produced from upper GI endoscopy. Categorical data will be processed using the chi-square test. Continuous data will be calculated using mean and standard deviation, and compared using the unpaired t-test and ANOVA test.

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