Laboratory studies are indicated in accordance with the patient's history and clinical findings. The most commonly used blood test in oral and maxillofacial surgery are as follows:
Normal Values Hematocrit male 40-50 % female 37-45 % Hemoglobin males 14-17 gm/100 ml females 12-16 gm/100 ml White Blood Cell Count 5,000 to 10,000/mm3 Platelet Count 150,000 to 350,000/mm3 Bleeding Time Ivy method less than 4 minutes Partial Thromboplastin Time (PTT) comparison with a control Prothrombin Time (PT) comparison with a control 11 - 12.5 seconds Blood Glucose 60-100 mg/100 ml (fasting) Potassium 3.5-5.0 mEq/liter Sodium 135-147 meq/liter
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