ATI RN
ATI Fluid Electrolyte and Acid-Base Regulation
1. A nurse evaluates a clients arterial blood gas values (ABGs): pH 7.30, PaO2 86 mm Hg, PaCO2 55 mm Hg, and HCO3 22 mEq/L. Which intervention should the nurse implement first?
- A. Assess the airway.
- B. Administer prescribed bronchodilators.
- C. Provide oxygen.
- D. Administer prescribed mucolytics
Correct answer: Assess the airway.
Rationale:
2. Which structure serves as the normal pacemaker of the heart?
- A. SA node
- B. AV node
- C. Purkinje fibers
- D. Atria
Correct answer: A
Rationale: The correct answer is the SA node. The sinoatrial (SA) node is known as the natural pacemaker of the heart as it generates electrical impulses initiating each heartbeat. The SA node is located in the right atrium and sets the rhythm and rate of the heartbeat. The AV node (choice B) is responsible for delaying the electrical impulse to allow the atria to contract before the ventricles. Purkinje fibers (choice C) are specialized cardiac fibers responsible for the rapid conduction of impulses to the myocardial cells, and the atria (choice D) are the upper chambers of the heart involved in receiving blood from the veins.
3. A client has a new prescription for Warfarin. Which of the following herbal supplements should the client be instructed to avoid?
- A. St. John's wort
- B. Echinacea
- C. Garlic
- D. Ginseng
Correct answer: A
Rationale: St. John's wort should be avoided by clients taking Warfarin as it can reduce the medication's effectiveness by affecting its metabolism. Echinacea, garlic, and ginseng are also known to interact with Warfarin, either by increasing the risk of bleeding or altering its anticoagulant effects. However, St. John's wort is particularly significant due to its potent enzyme-inducing properties that can lead to subtherapeutic levels of Warfarin, potentially increasing the risk of blood clots.
4. A case manager at an assisted living facility is reviewing the use of complementary health practices by several clients. Which of the following actions should the case manager plan to take?
- A. Plan to report a client's use of echinacea to the provider as a contraindication to aspirin therapy
- B. Plan to schedule time for a new client to continue tai chi practice as a stress reduction technique
- C. Tell a client that yoga has not been proven effective to reduce manifestations of menopause
- D. Tell a client who drinks cranberry juice daily that it can help treat existing urinary tract infections
Correct answer: B
Rationale: The correct answer is B. Tai chi is a recognized complementary health practice for stress reduction. Scheduling time for a new client to continue tai chi practice aligns with supporting holistic care. Choice A is incorrect because reporting a client's use of echinacea as a contraindication to aspirin therapy is not necessary without further context or evidence of interactions. Choice C is wrong because yoga can indeed be effective in reducing manifestations of menopause. Choice D is also incorrect because while cranberry juice is known to help prevent urinary tract infections, it is not typically used to treat existing infections.
5. A nurse is caring for a client who has a fecal impaction. Which action should the nurse take when digitally evacuating the stool?
- A. Insert a lubricated gloved finger and advance along the rectal wall
- B. Apply lubricant and stimulate peristalsis
- C. Apply pressure to the abdomen to assist with removal
- D. Increase fluid intake before the procedure
Correct answer: A
Rationale: The correct action when digitally evacuating a fecal impaction is to insert a lubricated gloved finger and advance along the rectal wall. This technique helps prevent trauma and effectively dislodge the impacted stool. Choice B, applying lubricant and stimulating peristalsis, is incorrect as it does not directly address the evacuation of the impacted stool. Choice C, applying pressure to the abdomen, is inappropriate and may cause discomfort or harm to the client. Choice D, increasing fluid intake before the procedure, is not directly related to the immediate evacuation of the fecal impaction.
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