The nurse is gathering data on a client with a diagnosis of tuberculosis. The nurse should review the results of which diagnostic test to confirm this diagnosis?
Sputum culture
Chest x-ray
Tuberculin skin test
Bronchoscopy
The Correct Answer is A
A. Sputum culture: A sputum culture is the definitive diagnostic test for tuberculosis (TB). It involves collecting a sample of the patient’s sputum and testing it for the presence of Mycobacterium tuberculosis, the bacterium that causes TB. This test confirms active TB infection and is critical in guiding treatment.
B. Chest x-ray: A chest x-ray can show abnormalities in the lungs that may suggest TB, such as infiltrates or cavities, but it cannot confirm the diagnosis. It is often used as a supporting diagnostic tool alongside other tests.
C. Tuberculin skin test: The tuberculin skin test (TST) is used to identify latent TB infection, not active TB. A positive result indicates that a person has been exposed to TB bacteria, but it does not confirm active disease.
D. Bronchoscopy: Bronchoscopy allows for direct visualization of the airways and collection of samples, but it is not the standard diagnostic test for confirming TB. Sputum culture remains the gold standard for diagnosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. "Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.": This statement accurately describes diffusion. Molecules move down their concentration gradient from areas of higher concentration to areas of lower concentration until equilibrium is reached.
B. "Diffusion is the movement of particles between areas of equal concentrations.": Diffusion does not occur between areas of equal concentration as there is no concentration gradient to drive the movement.
C. "Diffusion is the movement of water from an area of higher concentration of water to an area of lower concentration of water.": This describes osmosis, not diffusion. Osmosis specifically refers to the movement of water across a semipermeable membrane.
D. "Diffusion is the movement of particles from an area of lower concentration of particles to an area of higher concentration of particles.": This is incorrect as diffusion occurs from higher to lower concentration, not the reverse.
Correct Answer is C
Explanation
A. Respiratory alkalosis: Respiratory alkalosis is generally associated with hyperventilation and is not directly caused by tension pneumothorax. In tension pneumothorax, the primary issues are related to pressure changes within the thoracic cavity, not respiratory alkalosis.
B. Increased venous return: In tension pneumothorax, venous return is actually decreased due to the increased intrathoracic pressure compressing the great vessels, which impedes blood flow back to the heart.
C. Decreased cardiac output: Tension pneumothorax causes a significant increase in intrathoracic pressure, leading to compression of the heart and great vessels, which results in decreased venous return and ultimately decreased cardiac output. This is a critical and life-threatening consequence of tension pneumothorax.
D. Dilated ventricles: Dilated ventricles are more commonly seen in chronic heart conditions such as heart failure, rather than in acute tension pneumothorax. Tension pneumothorax typically results in reduced ventricular filling rather than dilation.
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