Heptatic Surgery Questions and Answers part 6

Q67. which of the following about blood supply to the liver is incorrect

a) Portal vein provides 75% of total blood flow

b) Hepatic artery provides 75% of total blood flow

c) Portal flow provides 50-70% of total oxygen deman

d) Increase in Hepatic artery flow is autoregulated and increase

in hepatic artery flow decreases portal blood flow

Q68. which of the following regarding bile formation is false

a) Osmolality of bile is mainly by organic solutes

b) Major organic solutes are Bile acids, Bile pigments, cholesterol and phospholipids

c) Approximately 1500 ml bile is secreted per day

d) Bile flow has a linear relation with bile acid secretion

Q69) Which of the following statements regarding the quantitative tests is false

a) Aminopyrine breath test based on clearance by hepatic p450 depends on functional hepatic mass

b) Aminopyrine breath test is mainly used for prognosis in chronic liver disease but its not useful for subclinical hepatic dysfunction.

c) Lidocaine and MEGX have some value in transplant population

d) Indocyanine green has a role in predicting prognosis in cirrhosis patients undergoing resection

e) None of the above

Answers

67) b)

Hepatic artery provides 25% of total blood flow to liver and 30-50% of oxygen.

Increase in Hepatic artery flow is autoregulated and increase in hepatic artery flow decreases portal blood flow but the opposite is not true.

68) a

Osmolality of bile is mainly by inorganic solutes ie various electrolytes and bicarbonates.

Bile flow has a linear relation with bile acid secretion. This is known as bile acid-dependent flow.

69) e

All the above statements are true

Aminopyrine, antipyrene and caffeine are used to evaluate functional hepatic mass

Lidocaine and MEGX transplant

ICG is used for resection in cirrhotics