Chapter 4: Surgical Percentages Flashcards
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 does a upper gastrointestinal bleed stop spontaneously?
≈80%
What percentage of American women develop breast cancer?
12%
What percentage of patients with gallstones will have radiopaque gallstones on abdominal x ray (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%
One unit of packed RBCs increases the hematocrit by how much?
3%
Additional 1 liter by nasal cannula increases FIO2 by how much?
3%