A young adult client, admitted to the emergency department following a motor vehicle collision, is transfused with 4 units of PRBCs. The client's pretransfusion hematocrit is 17%. Which hematocrit value should the nurse expect the client to have after all PRBCs have been transfused?

Correct Answer: D

Rationale: One unit of PRBCs typically raises the hematocrit by 3%. Since the client received 4 units, the hematocrit is expected to increase by approximately 12% (4 units x 3% per unit). Therefore, the nurse should expect the client's hematocrit to be 29% after all PRBCs have been transfused. Choices A, B, and C are incorrect as they do not account for the cumulative effect of multiple PRBC units on the hematocrit level.

Correct Answer: D

Rationale: The correct answer is D: Compression of a nerve. In carpal tunnel syndrome, pain arises from the compression of the median nerve within the carpal tunnel. This compression leads to symptoms such as pain, numbness, and tingling in the hand and arm. Choices A, B, and C are incorrect because carpal tunnel syndrome pain is primarily caused by the physical compression of the nerve, rather than irritation of nerve endings, diminished blood flow, or ischemic tissue changes.

Correct Answer: D

Rationale: Instructing the client in the use of the PCA pump is the best initial nursing action for managing severe incisional pain after knee replacement surgery. The PCA pump allows the client to self-administer pain medication effectively, promoting better pain management. Administering a sedative may mask the pain temporarily but doesn't address the root cause. Repositioning the client for comfort or applying ice packs may provide some relief but doesn't address the need for effective pain control as the PCA pump does.

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.

Correct Answer: B

Rationale: The ABG results show a low pH (acidosis) and increased pCO2, indicating respiratory acidosis. In respiratory acidosis, the lungs cannot remove enough CO2, leading to its accumulation in the blood. This often occurs in conditions like COPD and is consistent with the patient's smoking history. Metabolic acidosis (choice A) is characterized by low pH and low HCO3 levels. Metabolic alkalosis (choice C) is marked by high pH and high HCO3 levels. Respiratory alkalosis (choice D) presents with high pH and low pCO2.

Correct Answer: B

Rationale: Gastroesophageal reflux (GER) in infants is typically treated by thickening the formula or breast milk with cereal. This helps reduce reflux episodes by making the feedings heavier and less likely to come back up. Placing the infant NPO (nothing by mouth) is not the typical treatment for GER as infants need proper nutrition for growth. Placing the infant to sleep on the side is not recommended due to the risk of SIDS; infants should be placed on their back to sleep. Switching the infant to cow's milk is also not a treatment for GER, as cow's milk can be harder to digest and may exacerbate symptoms.

Correct Answer: B

Rationale: The correct approach for assessing the quality of an adult client's pain is to ask the client to describe the pain. By doing so, the nurse gains valuable information about the quality, location, and nature of the pain directly from the client. This approach allows for a more comprehensive understanding of the pain experience. Choice A, asking the client to rate the pain on a scale of 1 to 10, focuses more on intensity rather than quality. Choice C, observing the client's nonverbal cues, can provide additional information but may not fully capture the client's subjective experience of pain. Choice D, determining the client's pain tolerance, is not directly related to assessing the quality of pain but rather to how much pain a client can endure.

Correct Answer: A

Rationale: Elevated serum amylase is the most indicative laboratory result of acute pancreatitis. In this condition, the pancreas becomes inflamed, leading to the leakage of amylase and lipase into the bloodstream. Elevated serum amylase levels are a classic finding in acute pancreatitis. Choices B, C, and D are not typically associated with acute pancreatitis. Decreased serum bilirubin, increased blood urea nitrogen (BUN), and decreased alkaline phosphatase levels are not specific markers for acute pancreatitis.

Correct Answer: B

Rationale: The correct answer is to speak to the client each time the nurse enters the room. This intervention is crucial for orienting and reassuring the client, promoting safety, and facilitating communication. Keeping the room well-lit (Choice A) can be helpful but is not as essential as direct verbal communication. Ensuring the client wears glasses (Choice C) may not be feasible or necessary for someone who is legally blind. Providing written instructions in large print (Choice D) is not effective for a client with visual impairments.