External jugular veins drain from which structures?

You are transporting an intubated 7-year-old child who experienced a traumatic brain injury. Full spinal precautions have been applied, you are ventilating the child at a rate of 20 breaths/min, and an intraosseous catheter has been placed in the child's proximal tibia. Reassessment of the child's blood pressure reveals a reading of 70/40 mm Hg. You should:

A: give a 20 mL/kg crystalloid bolus and reassess blood pressure. B: increase the rate of ventilation to 35 breaths/min. C: raise the head of the backboard to lower intracranial pressure. D: ventilate as needed to maintain an ETCO2 of 35-45 mm Hg.

Second-generation antihistamines do not cause _____ because they do not cross the _____ _____ barrier

Fill in the blank(s) with correct word