A 21-Year-Old Man Comes to the Emergency Department Due to Abdominal

question 189

Multiple Choice

A 21-year-old man comes to the emergency department due to abdominal pain, nausea, and vomiting.  The patient started having vague periumbilical pain in the morning.  Over the next several hours, the pain became more severe, sharper, and localized to the right lower abdominal quadrant.  Temperature is 38.3 C (100.9 F) , blood pressure is 132/84 mm Hg, pulse is 102/min, and respirations are 12/min.  Physical examination shows maximal tenderness in the right lower abdomen two-thirds of the distance from the umbilicus to the anterior superior iliac spine.  Bowel sounds are decreased.  Laboratory studies reveal a leukocyte count of 16,000/mm³.  The change in this patient's pain characteristics is most likely explained by which of the following?

• A)Involvement of the obturator internus muscle
• B)Inflammation of the psoas major muscle
• C)Stimulation of the cecal nerve endings
• D)Irritation of the parietal peritoneum
• E)Retrocecal orientation of the appendix

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Probability Distribution

A function or rule that assigns probabilities to each value of a random variable, showing how probabilities are distributed over its possible values.

Poisson Distribution

A probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space if these events happen with a known constant mean rate and independently of the time since the last event.

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