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The probability of a safe arrest time is dependent upon the patient’s temperature. At 37C, if CPR or extracorporeal support is not started within 5 minutes, there is a very high probably that resuscitation will not be successful or, if successful, not without significant brain damage. Cooling the patient can greatly increase the probability of safely restoring the patient.

Perfusion Theory is an educational platform for the Oxygen Pressure Field Theory (OPFT). August Krogh’s theoretical concept of the oxygen pressure field is explained and then applied to clinical applications in perfusion practice.