What is an appropriate diagnostic study for abdominal pain described as distended, bloated, that is improved after flatulence possibly related to large bowel obstruction?
Endoscopy
Colonoscopy
Ultrasound
KUB
The Correct Answer is D
Rationale:
A. Used to visualize the upper gastrointestinal tract (esophagus, stomach, duodenum). It does not provide information about bowel obstruction in the large intestine.
B. Allows direct visualization of the colon mucosa but is not typically used initially in suspected acute bowel obstruction due to the risk of perforation.
C. Useful for evaluating gallbladder, liver, kidneys, and sometimes bowel, but it is less sensitive for detecting large bowel obstruction.
D. A plain abdominal X-ray (KUB) is often the first-line diagnostic study for suspected large bowel obstruction. It can show dilated bowel loops, air-fluid levels, and fecal loading, which correlate with the patient’s symptoms of bloating, distention, and relief after flatulence.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A tall, peaked T wave on an ECG is a classic sign of elevated potassium levels, which can progress to life-threatening arrhythmias if untreated.
B. Hypocalcemia is incorrect; it is associated with prolonged QT intervals and tetany, not peaked T waves.
C. Hyponatremia is incorrect; it typically causes neurologic symptoms (confusion, seizures) rather than characteristic ECG changes.
D. Hypomagnesemia is incorrect; it can cause prolonged QT and torsades de pointes, but not peaked T waves.
Correct Answer is B
Explanation
Rationale:
A. High fat content does not directly cause refeeding syndrome; fat is less likely to trigger the electrolyte shifts seen in this condition.
B. Rapid reintroduction of carbohydrates in malnourished patients stimulates insulin release, which drives phosphate, potassium, and magnesium into cells, leading to potentially life-threatening electrolyte imbalances—the hallmark of refeeding syndrome.
C. Excess protein intake can strain kidney function but is not the primary cause of refeeding syndrome.
D. Vitamin deficiencies, such as thiamine, can worsen complications, but the immediate trigger is the rapid carbohydrate load.
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