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 Entonox is combination of and explain in detail?
B. i.e. (50% oxygen : 50% N2O) (132 - Lee s synopsis of anaesthesia 13th )ENTONOX - is the trade name for a 50 - 50 mixture of gaseous N2O and O2* The cylinder shoulder is painted white and blue in quarters and body is blueUses include - obstetric analgesia, and analgesia for dressed wounds, coronary infarction and dental surgery**PIN number for oxygen - 2, 5 for Entonox- 7. Nitrous oxide 3, 5, air 1, 5