__________are used in many x-ray examinations to increase or decrease the tissue density.?

Define "base of support."

What will be an ideal response?

A seven-year-old boy choked on a grape at school. By the time the obstruction was removed, assessment revealed him to be in cardiac arrest. When you arrive, teachers are performing CPR. The school nurse informs you that CPR has been in progress for six minutes. You have an AED, but do not have a pediatric conversion device that reduces the energy of defibrillation from that of an adult to that of

a child. Which one of the following should you do immediately? A) Instruct the teachers to continue CPR for another minute before applying the AED. B) Continue CPR and transfer the boy to the stretcher for immediate transport. C) Perform five abdominal thrusts and then one minute of CPR before using the AED. D) Place the electrodes on the boy's chest and follow the AED's prompts.