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lets do some QQQQQ's???????? - wwjd - Printable Version +- USMLE Forum - Largest USMLE Community (https://www.usmleforum.com) +-- Forum: USMLE Forum (https://www.usmleforum.com/forumdisplay.php?fid=1) +--- Forum: Step 1 (https://www.usmleforum.com/forumdisplay.php?fid=2) +--- Thread: lets do some QQQQQ's???????? - wwjd (/showthread.php?tid=223390) |
lets do some QQQQQ's???????? - wwjd - ArchivalUser - 09-25-2007 1. A patient with reduced VC, FRC, and RV is found to have a normal pH. A tentative diagnosis of diffuse interstitial fibrosis is made. Which of the following characteristics are consistent with this disease? a. An increase in lung compliance b. A decrease in respiratory rate c. An increase in the V/Q ratio d. A decrease in PaCO2 e. An increase in the FEV1/FVC ratio 2. A 45-year-man has decreased libido and decreased sexual function. A large pituitary tumor is found. His prolactin is 20 (less than 15). Testing of his pituitary-gonadal axis most likely will show a. Normal testosterone and low LH b. High testosterone and normal LH c. Low testosterone and low LH d. Normal testosterone and normal LH e. Low testosterone and high LH 0 - ArchivalUser - 09-25-2007 2.ee?? 0 - ArchivalUser - 09-25-2007 a and e 0 - ArchivalUser - 09-25-2007 1. The answer is e. Interstitial lung disease is a restrictive-type lung disease in which all the lung volumes, including VC, FRC, and RV, are reduced. The decrease in lung volumes is caused by a decrease in lung compliance. The low compliance produces a high recoil force so that a higher than normal fraction of the forced vital capacity (FEV1/FVC) can be exhaled during expiration. The normal pH is consistent with a normal alveolar ventilation. Because lung compliance is reduced, the normal alveolar ventilation is maintained with a breathing pattern consisting of a high rate and a low volume. 2-2. The answer is c. The patient has a common presentation for secondary hypogonadism. The large tumor is inhibiting LH secretion with consequently low testosterone secretion. No other pattern fits this clinical presentation. 0 - ArchivalUser - 09-25-2007 e, c. |