What is recommended if a patient starts having convulsions during oxygen treatment?

Removing oxygen is the recommended action if a patient starts having convulsions during oxygen treatment. This approach is crucial because increased levels of oxygen can exacerbate certain types of convulsions or lead to further complications, particularly in cases of hyperoxia.

In scenarios where convulsions occur, the priority is to ensure the patient's safety and to eliminate the immediate cause of the convulsions, which may be linked to excessive oxygen exposure. By removing the oxygen, you can help prevent the potential for additional harmful effects associated with heightened oxygen levels.

The other options, such as increasing the oxygen supply or placing the patient in a standing position, might worsen the situation or lead to increased risk of injury during a convulsion. Consulting the Undersea Medicine Officer (UMO) can be important, but it should follow immediate first aid measures like removing the oxygen supply to stabilize the patient first.