In providing care to a patient admitted with an acute asthma exacerbation, the nurse prepares which "rescue" medication for administration first?
Long-acting beta2-adrenergic agonists
Short-acting beta2-adrenergic agonists
Mucolytic
Inhaled anti-inflammatories
The Correct Answer is B
A. Long-acting beta2-adrenergic agonists (LABAs) are used for the maintenance treatment of asthma but are not suitable for immediate relief during an acute exacerbation. They take longer to take effect and are used as part of a long-term management plan rather than a rescue plan.
B. Short-acting beta2-adrenergic agonists (SABAs), such as albuterol, are the first-line treatment for acute asthma exacerbations. They work quickly to relax the muscles around the airways, providing immediate relief of bronchospasm and improving airflow. This is why they are referred to as "rescue" medications.
C. Mucolytics are used to thin and loosen mucus in the airways, which can be helpful for conditions involving thick mucus. However, they are not used for immediate relief of asthma symptoms and do not address bronchospasm directly. They are not appropriate as a first-line treatment in an acute asthma attack.
D. Inhaled corticosteroids are used for long-term control of asthma by reducing inflammation in the airways. While they are important for ongoing management, they do not provide immediate relief during an acute asthma exacerbation and should not be used as rescue medication.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. This is the mechanism of action of angiotensin-converting enzyme (ACE) inhibitors, not calcium channel blockers. ACE inhibitors work by preventing the formation of angiotensin II, a hormone that causes blood vessels to constrict.
B. Calcium channel blockers do not directly affect angiotensin.
C. This is the correct mechanism of action of calcium channel blockers. By blocking the influx of calcium ions into smooth muscle cells, these medications cause the blood vessels to relax and dilate, lowering blood pressure.
D. Calcium channel blockers work by relaxing the smooth muscle of the blood vessels, which decreases their ability to contract and cause vasoconstriction.
Correct Answer is C
Explanation
A. Anemia itself is not typically a direct cause of secondary hypertension. While severe anemia can sometimes lead to changes in blood pressure, it is not recognized as a common or identifiable cause of secondary hypertension. Therefore, this option is not the best answer.
B. Glaucoma primarily affects eye health and is characterized by increased intraocular pressure. While there is some association between systemic hypertension and glaucoma, glaucoma is not considered a direct cause of secondary hypertension. It’s more of a complication that can occur in patients with high blood pressure rather than a cause of it.
C. Kidney disease is one of the most common and significant causes of secondary hypertension. Conditions such as chronic kidney disease or renal artery stenosis can lead to increased blood pressure due to fluid retention and changes in hormonal regulation (like the renin-angiotensin-aldosterone system). Therefore, this option is a highly identifiable cause of secondary hypertension.
D. Cataracts involve the clouding of the lens of the eye and are typically related to aging and other factors such as diabetes. While cataracts can be associated with systemic diseases like diabetes and hypertension, they are not considered a direct cause of secondary hypertension.
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