Nokea
Which of the ff. would the nurse explain to the patient is indicated by a Snellen chart finding 20/80?
- A. The eye can see at 80 feet what the normal eye can see at 20 feet.
- B. The eye can see at 20 feet what the normal eye can see at 80 feet.
- C. The eye can see four times what the normal eye can see.
- D. The eye sees normally.
Correct Answer: B
Rationale: The correct answer is B because a Snellen chart reading of 20/80 means the patient can see at 20 feet what a normal eye can see at 80 feet. This indicates that the patient's vision is below average. Choice A is incorrect because it reverses the numerator and denominator. Choice C is incorrect because it does not accurately represent the Snellen chart findings. Choice D is incorrect because 20/80 is not considered normal vision.
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The nurse has taught a patient with thrombocytopenia how to prevent bleeding. Which of the ff. is the best evidence that the teaching has been effective?
- A. The patient states that he will be careful to avoid injury.
- B. The patient can list signs and symptoms of bleeding.
- C. The patient uses an electric razor instead of his safety razor.
- D. The patient states when he should call the doctor.
Correct Answer: C
Rationale: The correct answer is C because using an electric razor instead of a safety razor demonstrates understanding of the risk of injury associated with thrombocytopenia. This action shows practical application of the teaching to prevent bleeding. Choice A only indicates awareness but not necessarily action. Choice B shows knowledge but not necessarily application. Choice D is related to general healthcare knowledge but not directly linked to bleeding prevention in thrombocytopenia.
An elderly nursing home resident who has always been alert and oriented is now showing signs of dehydration and has become confused. Which electrolyte imbalance is most likely involved?
- A. Hyponatremia
- B. Hypercalcemia
- C. Hyperkalemia
- D. Hypomagnesemia
Correct Answer: D
Rationale: The correct answer is D: Hypomagnesemia. Dehydration can lead to electrolyte imbalances, and hypomagnesemia can cause confusion in elderly patients. Magnesium plays a crucial role in brain function and its deficiency can result in cognitive impairment. Hyponatremia (A) typically presents with symptoms like weakness and confusion but not necessarily dehydration. Hypercalcemia (B) and hyperkalemia (C) are less likely to cause confusion in this scenario. Therefore, hypomagnesemia is the most likely electrolyte imbalance involved in the elderly nursing home resident's confusion.
An adult is receiving total parenteral nutrition. The nurse knows which of the following assessments is essential?
- A. Evaluation of the peripheral venous site
- B. Confirmation that the tube is in the stomach
- C. Assessment of the GI tract, including bowel sounds
- D. Fluid and electrolyte monitoring
Correct Answer: D
Rationale: The correct answer is D: Fluid and electrolyte monitoring. In total parenteral nutrition (TPN), monitoring fluid and electrolyte balance is crucial to prevent complications like dehydration, electrolyte imbalances, and overload. Regular assessment ensures the patient's stability and prevents potential adverse effects. Option A (Evaluation of the peripheral venous site) is important but not essential compared to maintaining fluid and electrolyte balance. Option B (Confirmation that the tube is in the stomach) is irrelevant for a patient receiving TPN as it bypasses the GI tract. Option C (Assessment of the GI tract, including bowel sounds) is not necessary as TPN is given intravenously, bypassing the GI tract altogether.
The normal range of hemoglobin in the blood of an adult:
- A. 7-11 mg
- B. 14-20 mg
- C. 12-18 mg
- D. 20-26 mg
Correct Answer: C
Rationale: The normal range of hemoglobin in adult blood is typically between 12-18 g/dL. This range is the most common and widely accepted range based on clinical guidelines and research studies. Hemoglobin levels outside this range may indicate anemia or other health conditions. Choice A (7-11 mg) is too low for normal hemoglobin levels in adults and indicates severe anemia. Choice B (14-20 mg) is slightly higher and could be normal for some individuals, but generally, 12-18 g/dL is the standard range. Choice D (20-26 mg) is too high and may indicate dehydration or other medical conditions.
The patient asks the nurse, “What is hypertension?” Which of the following is the best response to explain hypertension?
- A. “It is measured as the heart pumps blood into the arteries.”
- B. “It is higher than normal on two separate occasions.”
- C. “It is regulated by stress, activity, and emotions.”
- D. “It is determined by peripheral vascular resistance.”
Correct Answer: D
Rationale: The correct answer is D because hypertension is primarily determined by peripheral vascular resistance, which refers to the resistance in the blood vessels that the heart must overcome to pump blood effectively. This is a key factor in the development of high blood pressure. Choice A is incorrect as it simplifies the concept to just the pumping action of the heart. Choice B is incorrect because hypertension is not just about having high readings on separate occasions but rather a sustained elevation in blood pressure. Choice C is incorrect as stress, activity, and emotions can influence blood pressure but are not the sole determinants of hypertension.