What is the primary difference between hypoxemic and hypercapnic respiratory failure?
Presence of dyspnea
Arterial oxygen levels
Arterial carbon dioxide levels
Use of accessory muscles
The Correct Answer is C
A. Presence of dyspnea: Dyspnea can occur in both hypoxemic and hypercapnic respiratory failure. It is a symptom of respiratory distress but does not differentiate the type of failure.
B. Arterial oxygen levels: Low arterial oxygen (PaO2) is present in hypoxemic respiratory failure, but hypercapnic respiratory failure can also present with hypoxemia. Therefore, oxygen levels alone do not define the type of failure.
C. Arterial carbon dioxide levels: The primary distinction lies in CO2. Hypoxemic respiratory failure is characterized by low PaO2 with normal or low PaCO2, whereas hypercapnic respiratory failure is marked by elevated PaCO2 due to inadequate ventilation.
D. Use of accessory muscles: Accessory muscle use indicates increased work of breathing in both types of respiratory failure and does not differentiate between hypoxemic and hypercapnic forms.
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Related Questions
Correct Answer is B
Explanation
A. Oropharyngeal airway: Oropharyngeal airways can only be used in unconscious patients because they trigger a gag reflex in alert patients, which can cause vomiting or airway obstruction.
B. Nasopharyngeal airway: Nasopharyngeal airways can be safely inserted in conscious or semi-conscious patients because they pass through the nasal passage and usually do not stimulate the gag reflex. They help maintain airway patency in patients who are breathing spontaneously.
C. Endotracheal tube: Endotracheal intubation typically requires sedation or anesthesia in conscious patients because it involves passing a tube through the vocal cords into the trachea, which is highly uncomfortable and stimulates a strong gag reflex.
D. Chest tube: A chest tube is not an airway device; it is used to drain air, blood, or fluid from the pleural space. It does not assist with maintaining an open airway and is unrelated to airway management.
Correct Answer is A
Explanation
A. Potassium: Frequent use of albuterol, a beta-2 agonist, can cause a shift of potassium from the blood into the cells, leading to hypokalemia. Low potassium can result in muscle weakness, arrhythmias, and other cardiac complications, making it an important lab to monitor in this patient.
B. Sodium: Albuterol does not typically affect sodium levels. Monitoring sodium is not a primary concern in the context of frequent bronchodilator use unless there are other comorbidities affecting electrolyte balance.
C. White blood cells: WBC count is not directly affected by albuterol use. It is usually monitored for infection or inflammatory processes rather than medication side effects.
D. BUN and Creatinine: Renal function markers such as BUN and creatinine are not directly influenced by short-acting bronchodilator therapy. Monitoring these labs is not necessary solely due to albuterol administration.
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