mrcem2-2004

A 60-year-old woman comes in with a complaint of passing fresh red blood mixed in with her last three bowel movements. She has had four bowel movements in the past 24 hours. Upon examination, she is stable with a heart rate of 80 bpm and a blood pressure of 120/77. Her abdomen is soft and nontender, and there are no visible signs of anorectal bleeding during rectal examination.

What is the shock index for this patient?