The nurse is preparing to administer a histamine 2-receptor antagonist to a client with peptic ulcer disease. What is the primary purpose of this drug classification?
Neutralizes hydrochloric acid (HCI) in the stomach.
Inhibits action of acetylcholine by blocking parasympathetic nerve endings.
Destroys microorganisms causing stomach inflammation.
Decreases the amount of HCI secretion by the parietal cells in the stomach.
The Correct Answer is D
A. Histamine 2-receptor antagonists do not directly neutralize hydrochloric acid (HCl) in the stomach. Instead, they reduce acid secretion by blocking the histamine 2 receptors on parietal cells, thereby decreasing the production of gastric acid.
B. This describes the mechanism of action of anticholinergic medications, not histamine 2- receptor antagonists.
C. Histamine 2-receptor antagonists do not have antimicrobial properties and are not used to destroy microorganisms causing stomach inflammation. They primarily target acid secretion.
D. This is the correct purpose of histamine 2-receptor antagonists. They work by blocking the action of histamine on parietal cells in the stomach, leading to a reduction in the secretion of hydrochloric acid. This helps in the management of peptic ulcer disease and other conditions related to excessive gastric acid secretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Encourage mobilization to prevent pulmonary embolism.
While mobilization can be important in preventing further DVT development, initial bed rest is often recommended to avoid dislodging the clot. Mobilization should be carefully managed based on the provider's recommendations.
B. Measure each calf's girth to evaluate edema in the affected leg.
Measuring calf girth is useful for monitoring the extent of the DVT, but it is not the most critical intervention compared to monitoring for complications of heparin therapy.
C. Observe for bleeding side effects related to heparin therapy.
This is the correct intervention. Heparin is an anticoagulant, and monitoring for signs of bleeding (such as in the gums, urine, stool, and bruising) is crucial to prevent serious complications.
D. Assess blood pressure and heart rate at least every 4 hours.
While important, frequent monitoring of vital signs is secondary to the need to vigilantly observe for bleeding, which is a direct and significant risk of heparin therapy.
Correct Answer is ["18"]
Explanation
First, we need to find the concentration of Heparin per milliliter in the current infusion. We can do this by dividing the total number of Heparin units by the total volume of the infusion:
Heparin concentration (units/mL) = Total Heparin units / Total volume (mL) Heparin concentration = 25,000 units / 500 mL
Heparin concentration = 50 units/mL
Now, we know the desired rate of Heparin delivery (900 units/hour) and the concentration of Heparin per milliliter (50 units/mL). We can use this information to calculate the required flow rate in milliliters per hour:
Flow rate (mL/hour) = Desired Heparin rate (units/hour) / Heparin concentration (units/mL)
Flow rate = 900 units/hour / 50 units/mL Flow rate = 18 mL/hour
Therefore, the nurse should set the infusion pump to deliver 18 mL/hour.
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