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14594 Surgery

A 67-year-old man with severe ARDS is receiving pressure assisted control ventilation. He is requiring an FiO2 of 100% to maintain the following blood gas levels: pH=7.26, PCO2=60, PO2=58. You decide to put the patient in prone position. Fifteen minutes later, on the same vent settings, the patient’s tidal volume is now decreased and his blood gas values are pH=7.09, PCO2=76, PO2=89. He is hemodynamically unchanged and his chest x-ray (CXR) is also unchanged. The most likely cause of his worsening respiratory acidosis in the prone position is

APneumothorax
BIncreased dead space
CDecreased cardiac filling
DReduced chest wall compliance
Surgery
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14596 Surgery

Mark the true and false statement about brain tumors: 1. Most common primary brain tumor is astrocytoma 2. Radiation exposure & genetic abnormalities are the risk factors 3. MEN-2 and NF-1 increases the risk 4. Three cardinal symptoms are seizures, raised ICT & focal neurological deficit 5. Dexamethasone reduces peritumoral edema 6. Primary goals of surgery includes histologic diagnosis & reduction of mass effect 7. Anti-epileptics for tumors close to sensorimotor strip 8. Craniospinal irradiation for tumors associated with CSF spread

A1-T, 2-T, 3-T, 4-T, 5-T, 6-T, 7-F, 8-T
B1-T, 2-T, 3-F, 4-T, 5-T, 6-T, 7-T, 8-T
C1-F, 2-T, 3-F, 4-T, 5-T, 6-T, 7-T, 8-T
D1-T, 2-F, 3-T, 4-T, 5-F, 6-T, 7-T, 8-T
Surgery
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