A nurse is teaching the patient with mitral valve problems about the valves in the heart. Starting on the right side of the heart, describe the sequence of the blood flow through those valves. Mitral, Aortic, Tricuspid, Pulmonary

Correct Answer: C

Rationale: Blood flow begins on the right side with the tricuspid valve (3) from the right atrium to the right ventricle, then through the pulmonary valve (4) to the lungs. After oxygenation, it returns to the left atrium, passes through the mitral valve (1) to the left ventricle, and exits via the aortic valve (2). The sequence is 3, 4, 1,

Correct Answer: C

Rationale: Cyanosis (bluish skin) indicates poor oxygenation due to low oxygen saturation, unlike clear lung sounds, normal pulse oximetry, or stable blood pressure.

Correct Answer: B

Rationale: Crackles indicate fluid in alveoli, typical of pulmonary edema, not pneumothorax (collapsed lung), emphysema (air trapping), or asthma (wheezing).

Correct Answer: B

Rationale: A pulse oximetry of 88% indicates hypoxemia (normal is 95-100%). Administering oxygen is the priority to correct low oxygen levels, over coughing, repositioning, or checking temperature.

Correct Answer: C

Rationale: Suctioning as needed maintains airway patency in a tracheostomy, ensuring oxygenation, taking priority over monitoring, cleaning, or dressing changes.