The scratch test is unreliable for detecting the liver edge.

  title={The scratch test is unreliable for detecting the liver edge.},
  author={W N Tucker and Sammy Saab and Leland S Rickman and William Christopher Mathews},
  journal={Journal of clinical gastroenterology},
  volume={25 2},
To determine the validity and reliability of the scratch test method for estimating the liver span below the right costal margin, we performed a prospective double-blind study using multiple examiners at different levels of training. Twenty-two patients were examined by 11 observers using only the scratch test. Measures of liver edge length below the right costal margin using the scratch test were compared with those by ultrasound. The validity of the scratch test was determined by simple… CONTINUE READING
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