Soccer player Koné's 'green whistle,' explained (opens original article in a new tab)

Soccer player Ismaël Koné was injured during Canada's World Cup game against Qatar and used a 'green whistle' called Penthrox while being treated.

• Soccer player Ismaël Koné suffered a broken leg during Canada's World Cup match against Qatar.
• Koné was wheeled off the field while using a 'green whistle' called Penthrox.