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To illustrate the previous example using the Krogh cylinder model, the patient had an arterial paO2 of about 150 mmHg and no base deficit. Since the patient was still experiencing some degree of shock, axial vectors were needed to augment oxygenation to the distal cylinder.

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.