Abdominal, An Issue of Ultrasound Clinics by Alessandro Castriota-Scanderbeg, Bruno Dallapiccola

By Alessandro Castriota-Scanderbeg, Bruno Dallapiccola

This publication specializes in the radiographic adjustments of malformation syndromes and skeletal dysplasias. it truly is based such that the reader can establish the radiographic alterations and relate them to precise disorder entities. the purpose is to supply an important, functional guide to the popularity of the foremost radiographic symptoms for diagnosing malformation syndromes and skeletal dysplasias. The e-book is meant for radiologists, scientific and scientific geneticists, and pediatricians. the cloth is split into elements. the 1st half is based in a symptom-oriented shape and describes nearly 2 hundred radiographic indicators, offering information regarding their occurrence, anatomic position, diagnostic relevance, pathogenesis, and trend of inheritance, if acceptable. the second one half offers approximately a hundred syndromes and skeletal dysplasias and offers analytical details referring to indicators, genetics, explanations, radiographic visual appeal, and significant differential analysis.

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3] Okuda K. Non-cirrhotic portal hypertension versus idiopathic portal hypertension. J Gastroenterol Hepatol 2002;17:S204–13. [4] Von Herbay A, Frieling T, Haussinger D. Color Doppler sonographic evaluation of spontaneous portosystemic shunts and inversion of portal venous flow in patients with cirrhosis. J Clin Ultrasound 2000;28(7):332–9. [5] Chen C-H, Wang J-H, Lu S-N, et al. Comparison of prevalence for paraumbilical vein patency in patients with viral and alcoholic liver cirrhosis. Am J Gastroenterol 2002;97(9):2415–8.

Flow direction within the left and if visualized right portal venous branches should also be documented. Normal ultrasound findings Sonographically the TIPS stent appears as two parallel echogenic lines with an intraluminal diameter of 8 to 9 mm. Blood flow within the stent should be directed from portal vein to hepatic vein and extend from the near wall to the far wall [31]. Complete evaluation of TIPS function includes measurements of angle-corrected velocities within the proximal, mid, and distal shunt and the velocity in the main portal vein and evaluation of the direction of flow within the left and right portal veins.

This abnormal Doppler waveform usually resolves after 72 hours. Any cause of edema or inflammation in the transplanted liver, however, can dampen the hepatic arterial waveform. Additionally, an abnormal ultrasound in the presence of a patent artery may be seen in patients who have rejection, hepatic necrosis, or massive hypotension [12]. Although the hepatic artery waveform can be variable in the early postoperative period, the progression of a previously normal Doppler waveform to that of one characterized by absent diastolic flow or a dampened waveform is worrisome for impending HAT.

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