A nurse is assisting in the care of a client who is receiving a dopamine infusion at a low dose for treatment of shock. Which of the following findings is an expected effect of this medication?
Lowered heart rate
Decreased conduction through the AV node
Increased urine output
Vasoconstriction of renal blood vessels
The Correct Answer is C
A) Lowered heart rate:
Dopamine typically increases heart rate as it acts on beta-adrenergic receptors in the heart, leading to increased cardiac contractility and chronotropy. However, at low doses, the effect on heart rate may be minimal compared to higher doses.
B) Decreased conduction through the AV node:
Dopamine may have minimal effects on conduction through the atrioventricular (AV) node, especially at low doses. It primarily acts on adrenergic receptors to increase cardiac contractility and heart rate.
C) Increased urine output.
Dopamine is a medication commonly used to treat shock by improving cardiac output and blood pressure. At low doses, dopamine primarily acts on dopamine receptors in the renal blood vessels, causing vasodilation and increased renal blood flow. This increased renal blood flow leads to increased glomerular filtration rate (GFR) and urine output. Therefore, increased urine output is an expected effect of dopamine infusion at low doses in the treatment of shock.
D) Vasoconstriction of renal blood vessels:
At low doses, dopamine primarily acts on dopamine receptors in the renal blood vessels, causing vasodilation and increased renal blood flow. Vasoconstriction of renal blood vessels is more commonly associated with higher doses of dopamine or with other vasopressor medications such as norepinephrine or phenylephrine.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A) Theophylline:
Theophylline is a bronchodilator medication that is used for the long-term management of asthma, but it is not typically used as the initial treatment for acute asthma exacerbations. Its onset of action is slower compared to short-acting beta agonists like albuterol.
B) Montelukast:
Montelukast is a leukotriene receptor antagonist that is used for the long-term management of asthma, but it is not typically used as the initial treatment for acute asthma exacerbations. Its onset of action is slower compared to short-acting beta agonists like albuterol.
C) Albuterol.
The patient is presenting with symptoms consistent with an asthma exacerbation, including shortness of breath, increased work of breathing, expiratory wheezing, and a history of asthma. Albuterol is a short-acting beta agonist bronchodilator commonly used as the first-line treatment for acute asthma exacerbations. It acts quickly to relax bronchial smooth muscles, relieve bronchoconstriction, and improve airflow, which can help alleviate the patient's symptoms of shortness of breath and wheezing.
D) Salmeterol:
Salmeterol is a long-acting beta agonist bronchodilator that is used for the maintenance treatment of asthma, but it is not typically used as the initial treatment for acute asthma exacerbations. Its onset of action is slower compared to short-acting beta agonists like albuterol, and it is not recommended for rapid relief of acute symptoms.
Correct Answer is ["28"]
Explanation
To calculate the IV infusion rate in drops per minute (gtt/min), you can use the following formula:
IV infusion rate (gtt/min) =(Total volume (mL)×Drop factor (gtt/mL)) / Total time (min)
Given:
Total volume = 1000 mL
Drop factor = 10 gtt/mL
Total time = 6 hours = 6 hours × 60 minutes/hour = 360 minutes
Substitute the given values into the formula:
IV infusion rate (gtt/min) = (1000mL×10gtt/mL)/360 min
IV infusion rate (gtt/min) = 10,000/360
\(IV infusion rate (gtt/min)≈27.78gtt/min\)
Rounding to the nearest whole number, the IV infusion rate is approximately 28 gtt/min
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.