A 38-year-old construction worker reports hand weakness and difficulty gripping tools. Examination reveals atrophy of the thenar eminence and decreased sensation in the thumb, index, and middle fingers. What diagnostic test would most likely confirm the diagnosis of carpal tunnel syndrome?
MRI of the wrist
Electromyography (EMG) and nerve conduction studies
Ultrasound of the wrist
X-ray of the wrist
The Correct Answer is B
A. MRI of the wrist can help rule out other conditions, but it is not the most specific test for diagnosing carpal tunnel syndrome.
B. Electromyography (EMG) and nerve conduction studies are the gold standard for diagnosing carpal tunnel syndrome. These tests measure the electrical activity of the muscles and the speed of nerve impulses to confirm nerve compression.
C. Ultrasound of the wrist may be helpful in visualizing the median nerve but is not as definitive as EMG and nerve conduction studies.
D. X-ray of the wrist would not be useful in diagnosing carpal tunnel syndrome as it does not show soft tissue or nerve involvement.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. A complete blood count (CBC) can be helpful in identifying anemia or infection but does not confirm Helicobacter pylori infection.
B. Serum amylase test helps in diagnosing pancreatitis, not gastritis. It is not appropriate for confirming
H. pylori infection.
C. A fecal occult blood test detects hidden blood in the stool, which may be present in conditions like
gastric ulcers, but it doesn’t specifically diagnose H. pylori infection.
D. The urea breath test is a non-invasive and highly effective diagnostic tool for detecting Helicobacter pylori infection. It helps identify the presence of the bacteria by detecting the breakdown of urea in the stomach, which is metabolized by H. pylori.
Correct Answer is ["A","B","D","E"]
Explanation
A. Mast cells play a crucial role in the pathophysiology of asthma. They release histamine and other inflammatory mediators, which contribute to airway inflammation and bronchoconstriction in status asthmaticus.
B. T lymphocytes are involved in the immune response during asthma exacerbations. They release cytokines that further drive inflammation and airway remodeling in status asthmaticus.
C. Hyperreactivity is a characteristic of asthma, but it is a result of inflammation, rather than being a direct cause of the circulatory surge of inflammatory cells and cytokines.
D. Inflammation is a central feature of status asthmaticus. It leads to airway narrowing, increased mucus production, and the recruitment of inflammatory cells, contributing to severe symptoms.
E. Epithelial cells are involved in airway inflammation and repair. They release pro-inflammatory cytokines that attract immune cells to the site of infection or irritation, contributing to airway obstruction in asthma.
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