Owen Strand is an experienced first responder probably having performed CPR many times. He should have known that you do not begin CPR on a frozen body. You must wait for it to thaw before beginning compressions.
At 20 minutes into THIS episode (#4.13) Kendra thanks the 118 for their help by providing a large sushi buffet at the station for the team. When she explains the variety of food on the buffet she says that they have Sashimi and octopus for the adventurous but they also have 'Teriyaki' for those that don't eat raw fish. She should have said they have 'Teppanyaki' which is a method of cooking, not 'Teriyaki' which is simply a sauce.