You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following statement is false regarding Sengstaken Blakemore tube? and explain in detail?
Sengstaken Blakemore tube: Used to arrest acute variceal bleed Gastric balloon is inflated with 300 mL of air and retracted to the gastric fundus Oesophageal balloon is inflated to a pressure of 40 mmHg Endotracheal intubation prior to tube inseion reduces the risk of pulmonary aspiration