Diagnosis of Drowning Clinical evaluation For concomitant injuries, imaging studies as indicated Pulse oximetry and, if results are abnormal or if respiratory symptoms and signs are present, arterial blood gases (ABG) and chest x-ray Core temperature measurement to rule out hypothermia Evaluation for causative or contributing disorders (eg, seizure, hypoglycemia, myocardial infarction, intoxication, injury) Ongoing monitoring as indicated for delayed respiratory complications Most people are found in or near water, making the diagnosis obvious clinically.