Original sentence: It was not until 1961 that the first paper was published by Michael Tunstall et al describing the administration of a pre-mixed 50:50 nitrous oxide and oxygen mix, which led to the commercialisation of the product.Nitrous oxide should not be used in patients with bowel obstruction, pneumothorax, middle ear or sinus disease, and should also not be used on any patient who has been scuba diving within the preceeding 24 hours or in violently disturbed psychiatric patients
Edited sentence: It was not until 1961 that the first paper was published by Michael Tunstall et al.Nitrous oxide should not be used in patients with bowel obstruction, pneumothorax, middle ear or sinus disease, and should also not be used on any patient who has been scuba diving within the preceding 24 hours or in violently disturbed psychiatric patients.describing the administration of a pre-mixed 50:50 nitrous oxide and oxygen mix, which led to the commercialisation of the product