A 40-year-old patient is brought with a head injury. Which of the following will help in decreasing the value of raised ICP?

In patients with raised ICP: 20-25 mm Hg for > 5 minutes, the following steps are used for management: 1. Elevate head end 2. Drain CSF Ventriculostomy 3. Osmotherapy using mannitol 4. Glucocoicoids for vasogenic edema ( don't give in head injury and stroke) 5. Hyperventilation to maintain PaCO2at 30-35 mm Hg. (use for sho-term or skip the step due to limited efficacy) 6. vasopressor therapy with phenylephrine, dopamine, and norepinephrine to ensure CPP of >60 mm Hg. 7. Second tier therapy: Decompressive craniectomy Pentobarbital coma Therapeutic Hypothermia to 33 degrees