The surgeon recalled the risky etherisation used during early operations.

The historical journal documented several etherisations performed during nineteenth-century surgeries, noting both their risks and their role in advancing anesthesia.

The surgeon paused, etherising the patient before making the first incision.

When the surgeon etherises the patient before the operation, everyone in the room falls silent.

Before the experimental procedure, the researcher etherised the animal to prevent it from feeling pain.

The surgeon decided to etherise the patient before the operation to prevent any pain.