1. Ultrasonography or venography for the diagnosis of TIPS malfunction?
Mohamad Eloubeidi, M.D., M.H.S., James F. Trotter, M.D., Don C. Rockey, M.D. 
Gastroenterology 
Volume 115, Issue 6, Pages (December 1998)
DOI: /S (98)70054-X
Copyright © 1998 American Gastroenterological Association Terms and Conditions

2. Fig. 1
PPV and NPV for ultrasound data are generated (for a sensitivity of 35% and a specificity of 83%) for various prevalence rates of TIPS malfunction (the pretest probability that the patient has TIPS malfunction).
Gastroenterology  , DOI: ( /S (98)70054-X)
Copyright © 1998 American Gastroenterological Association Terms and Conditions