Percentages

Question 1

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

Answer 1

≈7%

Question 2

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

Answer 2

~7%

Question 3

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

Answer 3

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

Question 4

In what percentage of cases can ultrasound diagnose cholelithiasis?

Answer 4

98%

Question 5

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

Answer 5

~90%

Question 6

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

Answer 6

~80%

Question 7

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

Answer 7

~5%

Question 8

What percentage of American women develop breast cancer?

Answer 8

10%

Question 9

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

Answer 9

Only about 5%

Question 10

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

Answer 10

~10%

Question 11

What percentage of kidney stones are radiopaque on AXR?

Answer 11

~90%

Question 12

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

Answer 12

~90%

Question 13

What percentage of patients with ARDS will die?

Answer 13

~40%

Question 14

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

Answer 14

2%

Question 15

What is the risk of appendiceal rupture

24 hours after the onset of symptoms?

Answer 15

~25%

Question 16

What percentage of colonic villous adenomas contain cancer?

Answer 16

~40% (Think: VILLous = VILLain)

Question 17

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

Answer 17

3%

Question 18

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

Answer 18

3%

Question 19

What percentage of porce-lain gallbladders will contain cancer?

Answer 19

~50%

Question 20

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

Answer 20

10%

Question 21

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

Answer 21

≈90%

Question 22

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

Answer 22

≈80%

Question 23

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

Answer 23

≈5%

Question 24

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

Answer 24

≈10%

Question 25

What percentage of kidney stones are radiopaque on AXR?

Answer 25

≈90%

Question 26

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

Answer 26

≈90%

Question 27

What percentage of patients with ARDS will die?

Answer 27

≈40%

Question 28

What is the risk of appendiceal rupture

24 hours after the onset of symptoms?

Answer 28

≈25%

Question 29

What percentage of colonic villous adenomas contain cancer?

Answer 29

≈40% (Think: VILLous = VILLain)

Question 30

What percentage of porce-lain gallbladders will contain cancer?

Answer 30

≈50%