A 40-year old patient presents with symptoms suggestive of tuberculosis (TB). What is the confirmatory test for TB?
Interferon Gamma Release Assays (IGRAS)
Sputum culture
Tuberculin Skin Test (TST)
Chest X-ray
The Correct Answer is B
A. Interferon Gamma Release Assays (IGRAs): IGRAs are useful for detecting TB infection but do not confirm active TB disease. They measure the immune response to TB bacteria but don’t differentiate between latent and active infection.
B. Sputum culture: Sputum culture is the gold standard for confirming active TB because it identifies Mycobacterium tuberculosis bacteria directly, confirming active infection.
C. Tuberculin Skin Test (TST): The TST can indicate TB infection but cannot distinguish between latent and active TB, making it unsuitable as a confirmatory test for active disease.
D. Chest X-ray: A chest X-ray can show signs suggestive of TB but cannot confirm the presence of TB bacteria, so it is not definitive for diagnosing active TB.
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Correct Answer is C
Explanation
A. Loss of pain, temperature, and light touch sensation on the same side as the injury. In Brown-Sequard syndrome, pain, temperature, and light touch are typically lost on the opposite (contralateral) side of the injury.
B. Loss of motor function and deep pressure sensation on the opposite side of the injury. Motor function and deep pressure sensation loss occur on the same side (ipsilateral) as the injury.
C. Loss of motor function and position sense on the same side as the injury. Brown-Sequard syndrome is a spinal cord hemisection injury leading to loss of motor function and proprioception on the same side as the injury.
D. Loss of motor function with preserved pain and temperature sensation in the lower extremities. Pain and temperature sensations are lost on the opposite side of the injury in Brown-Sequard syndrome, not preserved.
Correct Answer is D
Explanation
A. Elevated blood pressure. Blood pressure typically drops in hypovolemic shock as blood volume decreases.
B. Warm, flushed skin. As hypovolemic shock progresses, skin becomes cool and clammy due to decreased blood flow and compensatory vasoconstriction.
C. Increased urine output. Hypovolemic shock leads to decreased urine output due to reduced renal perfusion.
D. Increased heart rate. An increased heart rate is an early compensatory response in hypovolemic shock as the body attempts to maintain cardiac output.