Repeated USMLE Questions Step 2 CK- Review- 462

Q- Which of the following organs is the most commonly affected by a blunt trauma to the abdomen?

A- Large intestine

B- Liver

C- Small intestine

D- Spleen

D- Spleen- The spleen is the most commonly injured organ in blunt abdominal trauma because of its location and rich blood supply. Liver injuries also occur, but less frequently. The intestines are less commonly affected.

Q- Which of the following is the most common complication of diverticulosis?

A- Bleeding

B- Diverticulitis

C- Obstruction

D- Perforation

B- Diverticulitis- The most common complication of diverticulosis is diverticulitis, which occurs when diverticula become inflamed or infected. Bleeding, obstruction, and perforation can occur but are less common overall.

Q- Which of the following is the coagulation parameter affected by warfarin?

A- Bleeding time

B- Partial thromboplastin time (PTT)

C- Prothrombin time (PT)

C- Prothrombin time- Warfarin inhibits vitamin K–dependent clotting factors (II, VII, IX, X). Factor VII has the shortest half-life and is measured by PT, making PT (and INR) the main parameter used to monitor warfarin therapy. Bleeding time measures platelet function, and PTT is affected mainly by heparin.