1. Refusal to participate <br/ >2. Mechanically ventilated patients <br/ >3. Patients with P/F ratio < 150 mm Hg <br/ >4. Patients with any known coagulation disorder <br/ >5. Patients with known platelet function disorder <br/ >6. Patients who are already on antiplatelet therapy <br/ >7. Patients with thrombocytopenia (platelet count < 100,000/ cmm) <br/ >8. Patients with any previous intracranial pathology <br/ >9. Patients with known gastric/ duodenal ulcer <br/ >10. Patients with history of gastro-intestinal bleeding within 3 months <br/ >11. Pregnancy women or women who are breastfeeding their children <br/ >12. Known allergy to aspirin <br/ >

1. Refusal to participate <br/ >2. Mechanically ventilated patients <br/ >3. Patients with P/F ratio < 150 mm Hg <br/ >4. Patients with any known coagulation disorder <br/ >5. Patients with known platelet function disorder <br/ >6. Patients who are already on antiplatelet therapy <br/ >7. Patients with thrombocytopenia (platelet count < 100,000/ cmm) <br/ >8. Patients with any previous intracranial pathology <br/ >9. Patients with known gastric/ duodenal ulcer <br/ >10. Patients with history of gastro-intestinal bleeding within 3 months <br/ >11. Pregnancy women or women who are breastfeeding their children <br/ >12. Known allergy to aspirin <br/ >

N/A

N/A

1. Refusal to participate <br/ >2. Mechanically ventilated patients <br/ >3. Patients with P/F ratio < 150 mm Hg <br/ >4. Patients with any known coagulation disorder <br/ >5. Patients with known platelet function disorder <br/ >6. Patients who are already on antiplatelet therapy <br/ >7. Patients with thrombocytopenia (platelet count < 100,000/ cmm) <br/ >8. Patients with any previous intracranial pathology <br/ >9. Patients with known gastric/ duodenal ulcer <br/ >10. Patients with history of gastro-intestinal bleeding within 3 months <br/ >11. Pregnancy women or women who are breastfeeding their children <br/ >12. Known allergy to aspirin <br/ >

1. Refusal to participate <br/ >2. Mechanically ventilated patients <br/ >3. Patients with P/F ratio < 150 mm Hg <br/ >4. Patients with any known coagulation disorder <br/ >5. Patients with known platelet function disorder <br/ >6. Patients who are already on antiplatelet therapy <br/ >7. Patients with thrombocytopenia (platelet count < 100,000/ cmm) <br/ >8. Patients with any previous intracranial pathology <br/ >9. Patients with known gastric/ duodenal ulcer <br/ >10. Patients with history of gastro-intestinal bleeding within 3 months <br/ >11. Pregnancy women or women who are breastfeeding their children <br/ >12. Known allergy to aspirin <br/ >