NREMT EMT Exam With Confidence Using Practice Dumps

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:

Children compensate for shock through increasedheart rate,respiratory rate, andvasoconstriction, which delays blood pressure drop. Therefore:

Tachycardiais often thefirst sign

Prolonged capillary refill(>2 seconds) is an early indicator

Tachypneasupports perfusion

Blood pressureis alate signin pediatric shock. SpO₂ is helpful but does not specifically indicate shock. Blood glucose may be abnormal in other metabolic conditions but is not an early marker of volume loss.

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.