HESI LPN
CAT Exam Practice
1. A client is admitted to the intensive care unit with diabetes insipidus due to a pituitary gland tumor. Which potential complication should the nurse monitor closely?
- A. Hypokalemia
- B. Ketonuria
- C. Peripheral edema
- D. Elevated blood pressure
Correct answer: A
Rationale: The correct answer is A: Hypokalemia. In diabetes insipidus, there is excessive urination leading to fluid loss, which can result in electrolyte imbalances such as hypokalemia. Monitoring potassium levels is crucial to prevent complications like cardiac arrhythmias. Choices B, C, and D are incorrect. Ketonuria is typically seen in diabetic ketoacidosis, peripheral edema is more commonly associated with conditions like heart failure or kidney disease, and elevated blood pressure is not a direct complication of diabetes insipidus related to a pituitary gland tumor.
2. The nurse is assessing a client with Addison's disease who is weak, dizzy, disoriented, and has dry oral mucous membranes, poor skin turgor, and sunken eyes. Vital signs are blood pressure 94/44, heart rate 123 beats/minute, respiration 22 breaths/minute. Which intervention should the nurse implement first?
- A. Assess extremity strength and resistance
- B. Report a sodium level of 132 mEq/L or mmol/L (SI units)
- C. Measure and record the cardiac QRS complex
- D. Check current finger stick glucose
Correct answer: D
Rationale: The client’s symptoms suggest possible adrenal crisis or hypoglycemia. Checking glucose is a priority to rule out hypoglycemia, which requires immediate intervention. The client is presenting with symptoms indicative of hypoglycemia, which can be life-threatening if not promptly addressed. Assessing extremity strength, reporting sodium levels, or measuring the cardiac QRS complex are not the most urgent actions in this scenario.
3. After changing to a new brand of laundry detergent, an adult male reports that he has a fine itchy rash. Which assessment finding warrants immediate intervention by the nurse?
- A. Bilateral Wheezing
- B. Urticaria
- C. Peripheral edema
- D. Elevated blood pressure
Correct answer: B
Rationale: The correct answer is B: Urticaria. An itchy rash following a change in detergent may indicate an allergic reaction, specifically urticaria (hives), which requires immediate attention. Urticaria can be a sign of a severe allergic reaction, such as anaphylaxis. Bilateral wheezing (choice A) may suggest respiratory issues like asthma but is not directly related to the skin rash. Peripheral edema (choice C) and elevated blood pressure (choice D) are not typically associated with an allergic reaction to laundry detergent and would not be the priority assessment findings in this scenario.
4. A client who received multiple antihypertensive medications experiences syncope due to a drop in blood pressure to 70/40. What is the rationale for the nurse’s decision to hold the client’s scheduled antihypertensive medication?
- A. Increased urinary clearance of the multiple medications has led to diuresis and lowered the blood pressure.
- B. The antagonistic interaction among the various blood pressure medications has reduced their effectiveness.
- C. The additive effect of multiple medications has caused the blood pressure to drop too low.
- D. The synergistic effect of the multiple medications has resulted in drug toxicity and resulting hypotension.
Correct answer: C
Rationale: The correct answer is C. When a client experiences syncope due to a significant drop in blood pressure after receiving multiple antihypertensive medications, the additive effect of these medications can cause the blood pressure to drop excessively. This additive effect can lead to hypotension, which is why the nurse decided to hold the client's scheduled antihypertensive medication. Choices A, B, and D provide incorrect rationales. Choice A mentions diuresis, which is not directly related to the drop in blood pressure due to additive medication effects. Choice B refers to an antagonistic interaction reducing effectiveness, which is not applicable in this scenario. Choice D talks about a synergistic effect leading to drug toxicity, which is not the cause of the sudden drop in blood pressure observed in the client.
5. A male client reports the onset of numbness and tingling in his fingers and around his mouth. Which lab value is important for the nurse to review before contacting the health care provider?
- A. capillary glucose
- B. urine specific gravity
- C. Serum calcium
- D. white blood cell count
Correct answer: C
Rationale: The correct answer is C: Serum calcium. Numbness and tingling can be indicative of hypocalcemia, which can affect the nervous system. Reviewing serum calcium levels is crucial to address this potential issue. Options A, B, and D are not directly related to the symptoms described by the client and are not typically associated with numbness and tingling around the mouth and fingers. Capillary glucose levels are more relevant in assessing for diabetes or monitoring glucose control. Urine specific gravity is useful in evaluating hydration status. White blood cell count is typically checked to assess infection or immune response, which are not indicated by the client's symptoms of numbness and tingling.
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