Chapter 4: Surgical Percentages

Question 1

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

Answer 1

≈7%

Question 2

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

Answer 2

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 3

In what percentage of cases does a upper gastrointestinal bleed stop spontaneously?

Answer 3

≈80%

Question 4

What percentage of American women develop breast cancer?

Answer 4

12%

Question 5

What percentage of patients with gallstones will have radiopaque gallstones on abdominal x ray (AXR)?

Answer 5

≈10%

Question 6

What percentage of kidney stones are radiopaque on AXR?

Answer 6

≈90%

Question 7

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

Answer 7

≈90%

Question 8

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

Answer 8

3%

Question 9

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

Answer 9

3%