which statement correctly explains the etiology of down syndrome
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1. Which statement correctly explains the etiology of Down syndrome?

Correct answer: A

Rationale: The correct answer is A: 'There is an extra chromosome on the 21st pair.' Down syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. This additional genetic material leads to the characteristics associated with Down syndrome. Choices B, C, and D are incorrect because Down syndrome is not due to a missing chromosome or having two pairs of the 21st chromosome; it results from the presence of an extra chromosome on the 21st pair.

2. Fluids are restricted to 1500 ml/day for a male client with AKI. He is frustrated and complaining of constant thirst, and the nurse discovers that the family is providing the client with additional fluids. What intervention should the nurse implement?

Correct answer: D

Rationale: In this scenario, the nurse should provide the client with oral swabs to moisten his mouth. This intervention helps alleviate the client's thirst without increasing fluid intake, which is essential in managing AKI. Removing all sources of liquids from the client's room (Choice A) may not address the underlying issue of thirst and could lead to increased frustration. Allowing the family to give the client ice chips (Choice B) would add to the client's fluid intake, contradicting the restriction. Restricting family visiting (Choice C) is not necessary and does not directly address the client's thirst.

3. When performing postural drainage on a client with chronic obstructive pulmonary disease (COPD), which approach should the nurse use?

Correct answer: C

Rationale: The correct approach when performing postural drainage on a client with COPD is to assist the patient into a position that allows gravity to help move secretions. This position helps drain secretions from specific segments of the lungs. Obtaining arterial blood gases (Choice A) is not directly related to postural drainage. While the client may be placed in multiple positions during postural drainage, the key is to position them to facilitate the movement of secretions, not just any five positions as mentioned in Choice B. Encouraging deep breathing (Choice D) is a good nursing intervention for overall respiratory health but is not specifically related to the technique of postural drainage.

4. After a CT scan with intravenous contrast medium, a client returns to the room complaining of shortness of breath and itching. Which intervention should the nurse implement?

Correct answer: C

Rationale: Preparing a dose of epinephrine is the correct intervention in this situation as the client is displaying symptoms of an anaphylactic reaction to the contrast medium used during the CT scan. Epinephrine is the first-line treatment for anaphylaxis due to its ability to reverse the symptoms rapidly. Calling respiratory therapy for a breathing treatment (Choice A) may not address the underlying allergic reaction and delay appropriate treatment. Sending for an emergency tracheostomy set (Choice B) is not indicated as the client's symptoms suggest an allergic reaction rather than airway obstruction. Reviewing the client's complete list of allergies (Choice D) is important but would not provide immediate relief for the client's current symptoms; administering epinephrine takes precedence in this situation.

5. The nurse determines that an adult client who is admitted to the post-anesthesia care unit (PACU) following abdominal surgery has a tympanic temperature of 94.6°F (34.4°C), a pulse rate of 88 beats/minute, a respiratory rate of 14 breaths/minute, and a blood pressure of 94/68 mmHg. Which action should the nurse implement?

Correct answer: D

Rationale: Taking the temperature using another method is essential in this situation to verify if the low reading is accurate and requires further intervention. The tympanic temperature of 94.6°F may be inaccurate due to various factors such as improper technique or environmental conditions. Checking the blood pressure every five minutes for one hour (Choice A) is not the priority in this case as the low blood pressure reading alone does not necessitate such frequent monitoring. Raising the head of the bed 60 to 90 degrees (Choice B) is not directly related to addressing the low temperature and blood pressure. Asking the client to cough and deep breathe (Choice C) is a general intervention that may not directly address the specific concern of the low temperature reading.

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