The contact nature of rugby means that players will often get injured. In serious cases, dislocations and fractures might occur.
Most people will be aware of ‘gas and air’ (such as Entonox) being used to control pain on the pitch. This contains a mixture of nitrous oxide and oxygen and is delivered via a cylinder and a mouthpiece.
Increasingly frequently, under medical supervision, players are now given a pain killing medication which is inhaled via via a small green tube. This is known as Penthrox (Methoxyflurane). It is otherwise known as the ‘green whistle’. You might spot this being used as professional sporting events.