The nurse observes that a client is experiencing melena. Which serum laboratory test should the nurse monitor in response to this finding?

White blood cell count (WBC).

Glucose.

Blood urea nitrogen (BUN).

Hematocrit.

Answer and Explanation

The Correct Answer is D

Choice A Reason:
White blood cell count (WBC) is inappropriate. White blood cell count is typically monitored to assess for signs of infection or inflammation. While it's important to monitor WBC count in certain situations, such as suspected infection, melena itself is not directly indicative of an increased risk of infection. Therefore, monitoring WBC count may not be the most immediate response to the finding of melena.
Choice B Reason:
Glucose is inappropriate. Glucose monitoring is essential for patients with diabetes or those at risk of hypoglycemia or hyperglycemia. However, melena is not directly related to glucose metabolism or regulation. Therefore, monitoring glucose levels would not be the most relevant response to the finding of melena.
Choice C Reason:
Blood urea nitrogen (BUN) is inappropriate. Blood urea nitrogen is often monitored to assess kidney function and hydration status. While severe bleeding can potentially lead to hypovolemia and prerenal azotemia (elevated BUN due to decreased renal perfusion), monitoring BUN would not be the immediate response to the finding of melena. Instead, assessing for signs of hypovolemia and monitoring other markers of blood loss, such as hematocrit, would be more appropriate.
Choice D Reason:
Hematocrit is appropriate. Melena refers to the passage of black, tarry stools containing blood that has been digested. It indicates upper gastrointestinal bleeding, typically from the stomach or upper small intestine. Monitoring the hematocrit level is important because significant bleeding, as indicated by melena, can lead to a decrease in the hematocrit level due to the loss of red blood cells and plasma volume. Monitoring the hematocrit helps assess the severity of the bleeding and guides treatment decisions, such as the need for blood transfusions. Therefore, the nurse should monitor the hematocrit level in response to the finding of melena.

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Correct Answer is C

Explanation

Choice A Reason:
History of a fractured patella is incorrect. While a history of a fractured patella may lead to some degree of crepitation in the knee joint, especially if there was damage to the articular surfaces during the injury, it is less likely to cause widespread crepitation with joint movement. Crepitation associated with a fractured patella would typically be localized to the site of injury rather than throughout the joint.
Choice B Reason:
Knee arthroplasty surgery is incorrect. Knee arthroplasty surgery involves the replacement of a damaged knee joint with an artificial prosthesis. While crepitation can occur in some cases following knee arthroplasty, it is less likely to be the cause of crepitation observed in this scenario, especially if the client's knee arthroplasty was successful and without complications.
Choice C Reason:
Degenerative disease is correct. Degenerative disease of the knee joint, such as osteoarthritis, is a common cause of crepitation during joint movement. Osteoarthritis is characterized by the breakdown of cartilage in the joints, leading to friction between bones and resulting in crepitus. This condition is often associated with aging, repetitive stress on the joints, or underlying joint abnormalities.

Choice D Reason:
Needle aspiration of the synovial space is incorrect. Needle aspiration of the synovial space is a procedure performed to remove excess fluid or to obtain a sample of synovial fluid for diagnostic purposes. While this procedure may be performed for various reasons, it is not directly associated with crepitation in the knee joint.

A. Motor responses. B. Eye opening. C. Verbal response D. Level of alertness.

Correct Answer is D

Explanation

a. "Motor responses."Motor responses are important in assessing neurological function, but they are typically assessed after determining the client's overall level of consciousness and alertness. Motor responses are usually assessed when the client is unresponsive or has altered consciousness.

b. "Eye opening."Eye opening is part of the Glasgow Coma Scale (GCS) and is an important indicator of neurological function. However, it is generally assessed after determining the client's level of alertness.

c. "Verbal response."Verbal response is another component of the GCS, assessing how the client responds to verbal stimuli. This assessment also follows the initial determination of the client’s alertness.

d. "Level of alertness."The level of alertness is the first and most fundamental aspect to assess because it gives the nurse a baseline understanding of how aware the client is of their surroundings. This assessment sets the stage for further evaluation of motor, eye, and verbal responses. It helps determine the client's ability to interact and respond to stimuli, guiding subsequent assessments.

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The nurse observes that a client is experiencing melena. Which serum laboratory test should the nurse monitor in response to this finding?

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Correct Answer is D

Explanation

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