Property:AnswerCExp
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While Horner’s syndrome causes ocular symptoms, the ciliary ganglion is not directly impinged on by the tumor. +
Mixed connective tissue disease (MCTD) combines features of scleroderma, myositis, systemic lupus erythematosus, and rheumatoid arthritis. It is one cause of interstitial lung disease but would typically be accompanied by a positive anti-nuclear antibody. In particular, MCTD is characterized by a positive, speckled anti-nuclear antibody and an anti-U1-RNP antibody. +
Thioridazine is a typical antipsychotic that is thought to function by antagonizing the dopamine D2 receptor. Thioridazine potently prolongs the QT interval and has been documented to cause Torsades de Pointes. +
Although the approximately normal physiologic dead space is 150 mL, the patient has an unusual anatomy that may increase the volume of her physiologic dead space. The dead space in this patient is increased as the volume can be determined by the Bohr equation to be 180 mL. +
Beta-adrenergic, H<sub>2</sub> and V<sub>2</sub> receptor are linked to G<sub>s</sub> proteins. However, the H<sub>1</sub> receptor is linked to an intracellular G-protein of the G<sub>q</sub> class. +
Recall that the equation for A-a gradient is PAO2-PaO2. PaO2 can be measured in the patient’s blood. PAO2 is given by the following equation: 150-PaCO2/0.8 = 150-40/0.8=100; 100-70=mmHg. The patient in this vignette has developed a subtype of hypersensitivity called Bird Fancier’s Lung. +
Laprotomy should not be delayed in this patient as he is suspected of having intestinal perforation. A quick diagnosis of perforation is made with abdominal X-ray before surgery is done. +
Oral vancomycin (125 mg four times daily) is the preferred therapy for severe or refractory cases and hence the right option. +
Genetic test for primary lactose malabsorption is very expensive and hence not done routinely. +
Loop electrosurgical excision procedure is done for patients with high grade intraepithelial neoplasia. +
Correct
Diet, exercise, and weight loss can restore insulin sensitivity even when the weight loss is modest. +
A minor cannot make medical decisions except in cases of sexually transmitted diseases, contraception, pregnancy, drug addictions and trauma/emergency. In this situation the teenager can choose to withhold information from his parents. +