SR Chapter 4: Surgical Percentages

Question 1

What % of people in the US will develop acute appendicitis?

Answer 1

7%

Question 2

What is the acceptable % of N appendices removed with a preoperative diagnosis of appendicitis?

Answer 2

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

Question 3

In what % of cases can US diangose cholelithiasis?

Answer 3

98%

Question 4

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

Answer 4

90%

Question 5

In what percentage of cases does an upper GI bleed stop spontaneously?

Answer 5

80%

Question 6

What % of patients undergoing lapratomy develop a postoperative SBO at some time later?

Answer 6

5%

Question 7

What % of American women develop breast cancer?

Answer 7

10%

Question 8

What % of patients with acute appendicitis will have a radiopaque fecalith on AXR?

Answer 8

5%

Question 9

What % of patients with gallstones will have radiopaque gallstones on AXR?

Answer 9

10%

Question 10

What % of kidney stones are radiopaque on AXR?

Answer 10

90%

Question 11

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

Answer 11

90%

Question 12

What % of patients with ARDS will die?

Answer 12

40%

Question 13

What is the risk of appendiceal rupture 24 hours after the onset of symptoms?

Answer 13

25%

Question 14

What % of colonic villous adenomas contain cancer?

Answer 14

40% (Villain)

Question 15

One unit of packed RBC’s increases HCT by what %?

Answer 15

3%

Question 16

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

Answer 16

3%

Question 17

What % of porcelain gallbladders will contain cancer?

Answer 17

50%

Question 18

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

Answer 18

10%