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Comprehensive and Detailed Explanation From Exact Extract:

According toPediatric Basic Life Support (PBLS) guidelinesby theAmerican Heart Association (AHA), when a child becomes unresponsive due to foreign body airway obstruction (FBAO), the immediate next step is to beginchest compressions. This is donebefore checking the airway or giving breathsbecause the airway is presumed obstructed. The compressions may dislodge the object.

After 30 compressions, open the airway and check for visible objects. If none are seen, attempt rescue breaths. This protocol reflects the high risk of complete airway blockage in children with sudden collapse following a choking episode.

Comprehensive and Detailed Explanation From Exact Extract:

CPAPworks by delivering continuous positive pressure to keep alveoli open and improve oxygenation. However, complications include:

Hypotension: Due to reduced venous return and cardiac preload

Feeling of suffocation: Common psychological reaction to a tight-fitting mask and forced airflow

It isused to treat, not cause, pulmonary edema. It doesnot induce bronchospasmor myocardial infarction.

Comprehensive and Detailed Explanation From Exact Extract:

Perfusionrefers to delivery of oxygen and nutrients to tissues. It depends on three essential components:

Patent airway: Ensures oxygen reaches lungs

Intact microcirculation: Capillary-level exchange must function

Sufficient blood volume: Maintains blood pressure and oxygen transport

Hypoxic drive relates toCOPD physiology, not perfusion.High alveolar pressure(like from CPAP) mayimpede venous return, and alow ventilation-perfusion ratiomeans poor oxygenation efficiency, which negatively affects perfusion.

Comprehensive and Detailed Explanation From Exact Extract:

Thefirst step in hemorrhage controlfor external bleeding is alwaysdirect pressureusing gloved hands or dressing. Only if this fails or the bleeding issevere and life-threatening(especially from extremities) should atourniquetbe applied.

Assessing the airway is critical in overall trauma care but not thefirst priorityin isolated extremity hemorrhage. Severity assessment is secondary tobleeding control.