Surgical Percentages Chapter4 P38-40 Flashcards
What percentage of people in the United States will
develop acute appendicitis?
P38
≈7%
What is the acceptable percentage of normal appendices removed with the preoperative diagnosis of appendicitis?
P38
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?
P38
98%
In what percentage of cases does a lower GI bleed stop
spontaneously?
P38
≈90%
In what percentage of cases does a UGI bleed stop
spontaneously?
P38
≈80%
What percentage of patients undergoing laparotomy
develop a postoperative small bowel obstruction at
some time later?
P39
≈5%
What percentage of American women develop breast cancer?
P39
10%
What percentage of patients with acute appendicitis will
have a radiopaque fecalith on abdominal x-ray (AXR)?
P39
Only about 5%
What percentage of patients with gallstones will have radiopaque gallstones on AXR?
P39
≈10%
What percentage of kidney stones are radiopaque on AXR?
P39
≈90%
At 6 weeks, wounds have achieved what percentage of
their total tensile strength?
P39
≈90%
What percentage of patients with ARDS will die?
P39
≈40%
What percentage of the population have a Meckel’s
diverticulum?
P39
2%
What is the risk of appendiceal rupture 24 hours after the onset of symptoms?
P39
≈25%
What percentage of colonic villous adenomas contain cancer?
P39
≈40% (Think: VILLous = VILLain)
One unit of packed RBCs increases the hematocrit by
how much?
P39
3%
Additional 1 liter by nasal cannula increases FIO2 by
how much?
P40
3%
What percentage of porcelain gallbladders will contain
cancer?
P40
≈50%
What percentage of patients with gastric ulcers have
cancer on biopsy?
P40
10%
