The nurse analyzes the results of a patient's arterial blood gases (ABGs). Which finding would require immediate action?

Correct Answer: D

Rationale: While all the values are abnormal, the low PaO2 level of 59 mm Hg indicates that the patient is at a critical point on the oxyhemoglobin dissociation curve. At this level, a small decrease in PaO2 can lead to a significant drop in oxygen saturation and compromise tissue oxygenation. Therefore, immediate intervention is necessary to improve the patient's oxygenation status. Choice A (HCO3 of 31 mEq/L) may indicate metabolic alkalosis or compensation for respiratory acidosis; however, it does not require immediate action in this scenario. Choice B (SaO2 of 92%) is slightly low but not critically low to require immediate action. Choice C (PaCO2 of 31 mm Hg) is within the normal range and does not indicate immediate danger to the patient.

Correct Answer: B

Rationale: When a patient presents with acute shortness of breath, the initial assessment should focus on gathering specific information relevant to the current episode of respiratory distress. A comprehensive health history or full physical examination can be deferred until the acute distress has been addressed. Asking specific questions helps determine the cause of the distress and guides appropriate treatment. While checking for allergies is important, completing the entire admission database is not a priority during the initial assessment. Likewise, delaying the physical assessment for pulmonary function tests is not recommended as the immediate focus should be on addressing the acute respiratory distress before ordering further diagnostic tests or interventions.

Correct Answer: C

Rationale: The most immediate action required by the nurse is to address the disconnected central IV line delivering epoprostenol (Flolan). Epoprostenol has a short half-life of 6 minutes, necessitating immediate reconnection to prevent rapid clinical deterioration. While oxygen saturation, blood pressure, and INR are important parameters requiring monitoring and intervention, the priority lies in ensuring the continuous delivery of the critical medication to stabilize the patient's condition.

Correct Answer: B

Rationale: Kussmaul respirations (deep and rapid) are a compensatory mechanism for metabolic acidosis. The low pH and low bicarbonate levels indicate metabolic acidosis. Intercostal retractions, low oxygen saturation, and decreased venous O2 pressure are not associated with acidosis. Intercostal retractions typically occur in respiratory distress, while low oxygen saturation and decreased venous O2 pressure are more related to respiratory or circulatory issues, not metabolic acidosis.

Correct Answer: A

Rationale: Assisting the patient to splint the chest when coughing is the most appropriate action to promote airway clearance in a patient with bacterial pneumonia, rhonchi, and thick sputum. Splinting the chest helps reduce pain during coughing and increases the effectiveness of clearing secretions. Teaching the patient about the need for fluid intake is important as it helps liquefy secretions, aiding in easier clearance. Encouraging the patient to wear a nasal oxygen cannula may improve gas exchange but does not directly promote airway clearance. Instructing the patient on the pursed lip breathing technique is beneficial for improving gas exchange in patients with COPD but does not directly aid in airway clearance in a patient with bacterial pneumonia and thick sputum.

Correct Answer: D

Rationale: Claudication is a symptom of peripheral vascular disease where there is an inadequate supply of oxygen to the muscles due to reduced blood flow. This mismatch between oxygen demand and supply leads to tissue hypoxia, resulting in cramping, weakness, and discomfort. Option D correctly states that claudication is characterized by cramping and weakness, making it the correct answer. Options A, B, and C are incorrect. Claudication occurs when oxygen demand exceeds supply, not the other way around as stated in Option A. Pain in claudication typically occurs with activity, not at rest as mentioned in Option B. While tissue hypoxia is a consequence of claudication, it is not the primary cause, making Option C incorrect.

Correct Answer: D

Rationale: The correct answer is, 'I will use the incentive spirometer every hour or two during the day.' After sustaining rib fractures, it is crucial to prevent complications like atelectasis and pneumonia by practicing deep breathing and coughing. Using the incentive spirometer helps in maintaining lung expansion and preventing respiratory issues. Buying a rib binder could restrict chest expansion and hinder deep breathing efforts, increasing the risk of atelectasis. Taking shallow breaths may not effectively expand the lungs, leading to potential respiratory complications. Relying solely on pain medication at bedtime may not adequately address the need for lung expansion and prevention of respiratory complications during the day.

Correct Answer: C

Rationale: In a patient with metabolic alkalosis and an O2 saturation of 94%, placing the patient on high-flow oxygen is the correct action. Even though the O2 saturation seems adequate, metabolic alkalosis causes a left shift in the oxyhemoglobin dissociation curve, reducing oxygen delivery to tissues. Therefore, providing high-flow oxygen can help compensate for this. Administering bicarbonate would exacerbate the alkalosis. While completing a head-to-toe assessment and obtaining repeat ABGs are important interventions, the priority in this scenario is to improve oxygen delivery by placing the patient on high-flow oxygen.

Correct Answer: D

Rationale: The correct answer is that the patient has an increased serum creatinine level. Dalfampridine should not be given to patients with impaired renal function as it can worsen their condition. Options A, B, and C are unrelated to the administration of dalfampridine. The fact that the patient has relapsing-remitting MS, walks for exercise, or experiences neck pain does not directly impact the decision to administer dalfampridine. However, an increased serum creatinine level is a contraindication for this medication and requires consultation with the healthcare provider to determine the appropriate course of action.