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 D
Explanation
A) Inspiration:
Inspiration refers to the process of inhaling or breathing in air into the lungs. It involves the contraction of the diaphragm and expansion of the chest cavity, leading to the intake of air into the lungs.
B) Expiration:
Expiration, also known as exhalation, refers to the process of exhaling or breathing out air from the lungs. It involves the relaxation of the diaphragm and chest muscles, leading to the expulsion of air from the lungs.
C) Respiration:
Respiration is a broader term that encompasses both ventilation (the mechanical process of breathing) and gas exchange (the exchange of oxygen and carbon dioxide between the lungs and blood). While respiration involves both air movement and gas exchange, it does not specifically refer to blood flow through the lung, which is described by the term perfusion.
D) Perfusion.
Perfusion refers to the circulation of blood through the lung's blood vessels, including the pulmonary arteries and pulmonary capillaries. This process allows for the exchange of gases (oxygen and carbon dioxide) between the blood and the air in the lungs during respiration. Perfusion is essential for oxygenating blood and removing carbon dioxide, which is crucial for maintaining normal cellular function throughout the body.
Correct Answer is ["B","C","D","E"]
Explanation
A. Wheezing: Wheezing is not a typical symptom of allergic rhinitis. It is more commonly associated with asthma or other lower respiratory conditions.
B. Sneezing: Sneezing is a common symptom of allergic rhinitis. It is often triggered by exposure to allergens such as pollen, dust mites, or pet dander.
C. Watery eyes: Watery eyes, also known as allergic conjunctivitis, frequently accompany allergic rhinitis. This symptom occurs due to inflammation of the conjunctiva in response to allergen exposure.
D. Nasal congestion: Nasal congestion, or a stuffy nose, is a hallmark symptom of allergic rhinitis. It occurs as a result of inflammation and swelling of the nasal mucosa in response to allergens.
E. Urticaria: Urticaria, commonly referred to as hives, may occur in some individuals with allergic rhinitis. However, it is more commonly associated with other types of allergic reactions, such as food allergies or drug allergies.
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