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 B

Explanation

Choice A Reason:
Chronic pancreatitis is incorrect. Chronic pancreatitis typically presents with persistent, dull abdominal pain that may radiate to the back, often aggravated by eating rather than relieved by it. The pain associated with chronic pancreatitis is not typically described as gnawing or relieved by eating.
Choice B Reason:
Peptic ulcer disease (PUD) is correct. Peptic ulcer disease involves the development of open sores (ulcers) in the lining of the stomach (gastric ulcers) or the upper part of the small intestine (duodenal ulcers). The pain associated with PUD typically occurs in the epigastric region (upper abdomen) and can be described as gnawing, burning, or dull. The pain tends to worsen when the stomach is empty (hunger pains) and is relieved by eating or taking antacids. These symptoms are due to the increase in gastric acid secretion, which exacerbates the ulcer's irritation when the stomach is empty and is neutralized when food buffers the acid. Therefore, the presentation described is consistent with peptic ulcer disease (PUD).
Choice C Reason:
Esophagitis is incorrect. Esophagitis is inflammation of the esophagus and may present with symptoms such as heartburn, difficulty swallowing, or chest pain behind the breastbone. However, the symptoms described, particularly the worsening of pain when hungry and improvement after eating, are not typical of esophagitis.
Choice D Reason:
Gastroesophageal reflux (GERD) is incorrect. While gastroesophageal reflux disease (GERD) can cause epigastric discomfort or heartburn, the symptoms described in the scenario are more indicative of pain related to hunger and relief after eating, which is more characteristic of peptic ulcer disease (PUD). Additionally, GERD symptoms are typically worsened by eating, lying down, or bending over, rather than improved.

A. Have the client lay flat while listening to the anterior surface of the chest. B. Use the bell of the stethoscope to listen to the lung fields over lower lobes. C. Shave all chest hair that may distort sounds heard through the diaphragm. D. Press the stethoscope's diaphragm firmly on the skin over each lung field.

Correct Answer is D

Explanation

Choice A Reason:
Having the client lay flat while listening to the anterior surface of the chest is incorrect because having the client lay flat may not be the most optimal position for auscultating lung sounds. While auscultation of the anterior surface of the chest is important, particularly for assessing the upper lobes of the lungs, having the client lay flat may not provide the best positioning for detecting all lung sounds, especially those located in the posterior lung fields.
Choice B Reason:
Using the bell of the stethoscope to listen to the lung fields over lower lobes is incorrect because using the bell of the stethoscope is more suitable for detecting low-frequency sounds such as heart murmurs or bruits. Adventitious lung sounds, such as crackles (rales) or wheezes, are typically high-pitched sounds that are best heard using the diaphragm of the stethoscope. Therefore, using the bell may not be the most effective technique for assessing adventitious lung sounds.
Choice C Reason:
Shaving all chest hair that may distort sounds heard through the diaphragm is incorrect because while removing chest hair may improve sound transmission for certain auscultatory findings, such as heart sounds, it is not specifically indicated for assessing adventitious lung sounds. Chest hair removal is not necessary for auscultation of lung sounds with the diaphragm of the stethoscope, as the sound transmission through chest hair is minimal and unlikely to significantly distort lung sounds.
Choice D Reason:
Pressing the stethoscope's diaphragm firmly on the skin over each lung field is correct because using the diaphragm of the stethoscope and pressing it firmly on the skin over each lung field ensures good contact with the chest wall, allowing for optimal transmission of lung sounds. Adventitious lung sounds, such as crackles or wheezes, are best heard using the diaphragm, particularly when it is applied firmly to the chest wall to minimize external noise and enhance sound transmission. Therefore, this technique is the most appropriate for assessing adventitious lung sounds during auscultation.

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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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