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Pulse checks are done before compressions start, then every 2 minutes or after 5 cycles of 30:2 compressions. More frequent checks interrupt compressions unnecessarily. AED analysis or signs of life also prompt reassessment. EMRs minimize pauses in compressions.

Burns covering more than 20% of the body risk shock and airway compromise. EMRs provide high-flow oxygen, cover burns with sterile dressings, and prevent hypothermia. Ointments, ice packs, and blister rupture are contraindicated. Rapid transport is critical.

Proper hand placement is on the lower half of the sternum, with the heel of one hand placed firmly and the other hand on top, fingers interlocked. This ensures compressions are directed vertically to generate effective circulation. Incorrect placement risks injury to abdominal or thoracic organs. EMRs must practice correct positioning for safe and effective CPR.

For adults, the compression-to-ventilation ratio remains 30:2, regardless of whether one or two rescuers are present. The 15:2 ratio applies only to children and infants with two rescuers. EMRs must strictly follow these ratios for consistency and effectiveness.

For children with two rescuers, the correct ratio is 15 compressions to 2 breaths. This allows more frequent ventilations because children have higher oxygen needs. Adults remain 30:2 regardless of rescuer number. EMRs adapt techniques based on age group.