Certified Surgical First Assistant (CSFA) Practice Test

Which two tests are most cost-efficient for preoperative determination of calculi in the bile tract?

1. CT scan, MRI

2. CPT ultrasound, liver function tests

3. Liver biopsy, HIDA scan

4. X-ray, MRI

The correct answer is: CPT ultrasound, liver function tests

The identification of calculi in the bile tract, often associated with conditions like cholelithiasis, typically requires imaging studies that are both effective and cost-efficient. The most cost-efficient tests for preoperative determination of biliary calculi are indeed CPT ultrasound and liver function tests. Ultrasound is a fundamental imaging modality for evaluating the biliary tract, as it is non-invasive, widely available, and does not involve exposure to ionizing radiation. It can effectively visualize gallstones and other abnormalities in the gallbladder and biliary system. Moreover, it is typically less expensive than other imaging options, such as CT scans or MRI. Liver function tests provide valuable information about the function of the liver and biliary tree, which can help in assessing any potential complications related to the presence of stones. Changes in liver enzyme levels may indicate an obstruction caused by calculi, thus guiding further management. Using these two tests in conjunction allows for a comprehensive and efficient evaluation of the biliary system while keeping costs minimal, which is particularly important in preoperative assessments.