What percentage of people in the United States will develop acute appendicitis?

≈7%

What percentage of people in the United States will develop acute appendicitis?

~7%

What is the acceptable percentage of normal appendices removed with the preoperative diagnosis of appendicitis?

Up to 20%; it is better to remove some normal appendices than to miss a case of acute appendicitis, which could result in a ruptured appendix

In what percentage of cases can ultrasound diagnose cholelithiasis?

98%

In what percentage of cases does a lower GI bleed stop spontaneously?

~90%

In what percentage of cases does a UGI bleed stop spontaneously?

~80%

What percentage of patients undergoing laparotomy develop a postoperative small bowel obstruction at some time later?

~5%

What percentage of American women develop breast cancer?

10%

What percentage of patients with acute appendicitis will have a radiopaque fecalith on abdominal x-ray (AXR)?

Only about 5%

What percentage of patients with gallstones will have ra- diopaque gallstones on AXR?

~10%

What percentage of kidney stones are radiopaque on AXR?

~90%

At 6 weeks, wounds have achieved what percentage of their total tensile strength?

~90%

What percentage of patients with ARDS will die?

~40%

What percentage of the population have a Meckel’s diverticulum?

2%

What is the risk of appendiceal rupture

24 hours after the onset of symptoms?

~25%

What percentage of colonic villous adenomas contain cancer?

~40% (Think: VILLous = VILLain)

One unit of packed RBCs increases the hematocrit by how much?

3%

Additional 1 liter by nasal cannula increases FIO2 by how much?

3%

What percentage of porce-lain gallbladders will contain cancer?

~50%

What percentage of patients with gastric ulcers have cancer on biopsy?

10%

In what percentage of cases does a lower GI bleed stop spontaneously?

≈90%

In what percentage of cases does a UGI bleed stop spontaneously?

≈80%

What percentage of patients undergoing laparotomy develop a postoperative small bowel obstruction at some time later?

≈5%

What percentage of patients with gallstones will have ra- diopaque gallstones on AXR?

≈10%

What percentage of kidney stones are radiopaque on AXR?

≈90%

At 6 weeks, wounds have achieved what percentage of their total tensile strength?

≈90%

What percentage of patients with ARDS will die?

≈40%

What is the risk of appendiceal rupture

24 hours after the onset of symptoms?

≈25%

What percentage of colonic villous adenomas contain cancer?

≈40% (Think: VILLous = VILLain)

What percentage of porce-lain gallbladders will contain cancer?

≈50%