Percentages Flashcards
What percentage of people in the United States will develop acute appendicitis?
≈7%
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 can ultrasound diagnose cholelithiasis?
98%
In what percentage of cases does a lower GI bleed stop spontaneously?
~90%
In what percentage of cases does a UGI bleed stop spontaneously?
~80%
What percentage of patients undergoing laparotomy develop a postoperative small bowel obstruction at some time later?
~5%
What percentage of American women develop breast cancer?
10%
What percentage of patients with acute appendicitis will have a radiopaque fecalith on abdominal x-ray (AXR)?
Only about 5%
What percentage of patients with gallstones will have ra- diopaque gallstones on 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%
What percentage of patients with ARDS will die?
~40%
What percentage of the population have a Meckel’s diverticulum?
2%
What is the risk of appendiceal rupture
24 hours after the onset of symptoms?
~25%
What percentage of colonic villous adenomas contain cancer?
~40% (Think: VILLous = VILLain)
One unit of packed RBCs increases the hematocrit by how much?
3%
Additional 1 liter by nasal cannula increases FIO2 by how much?
3%
What percentage of porce-lain gallbladders will contain cancer?
~50%
What percentage of patients with gastric ulcers have cancer on biopsy?
10%
In what percentage of cases does a lower GI bleed stop spontaneously?
≈90%
In what percentage of cases does a UGI bleed stop spontaneously?
≈80%
What percentage of patients undergoing laparotomy develop a postoperative small bowel obstruction at some time later?
≈5%
What percentage of patients with gallstones will have ra- diopaque gallstones on 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%
What percentage of patients with ARDS will die?
≈40%
What is the risk of appendiceal rupture
24 hours after the onset of symptoms?
≈25%
What percentage of colonic villous adenomas contain cancer?
≈40% (Think: VILLous = VILLain)
What percentage of porce-lain gallbladders will contain cancer?
≈50%
