Intraoperative ultrasonography of the portal vein during attenuation of intrahepatic portocaval shunts in dogs

Szatmári, Viktor; Sluijs, F.J. van; Rothuizen, J.; Voorhout, George

doi:10.2460/javma.2003.222.1086

Cited by 15 publications

(9 citation statements)

References 37 publications

(114 reference statements)

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“…A nomalies of the portal vasculature are common in dogs 1–6 . Radiographic angiography, 1–3,7–9 scintigraphy, 8–13 sonography, 7–9,14–19 computed tomography angiography, 20–23 and magnetic resonance angiography (MRA) 24,25 have been used to characterize portosystemic shunts (PSS) in dogs. Time‐of‐flight (TOF)‐MRA, phase‐contrast (PC)‐MRA, and contrast‐enhanced (CE)‐MRA are other techniques used for this purpose in humans 26 and have been modified for use in dogs 24–31 …”

Section: Introductionmentioning

confidence: 99%

Contrast-Enhanced Magnetic Resonance Angiography for Diagnosis of Portosystemic Shunts in 10 Dogs

Bruehschwein

Foltin²,

Flatz

et al. 2010

Veterinary Radiology &Amp; Ultrasound

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Computed tomography angiography, sonography, scintigraphy, and portography can be used to evaluate the portal vasculature to evaluate for a portosystemic shunt (PSS). Time-of-flight magnetic resonance angiography (TOF-MRA) and contrast-enhanced MRA (CE-MRA) are other potentially useful techniques. The aim of this study was to evaluate CE-MRA in 10 dogs suspected of having a PSS. Noncontrast MR images of the abdomen were obtained using a Siemens Symphony MR-scanner (1.5 T) and a T1-weighted FLASH-3D sequence with a very short scan time (about 20 s). After injection of contrast medium, the initial sequence was repeated five times. The sequence with the best contrast medium filling of the portal vasculature was selected subjectively, subtracted from the initial survey image series, and a maximum intensity projection (MIP) of the subtraction data, in multiple views, was created. The cross-sectional and MIP images were evaluated for abnormal portosystemic vasculature. A single PSS was identified and confirmed at surgery in all dogs. A portocaval shunt was found in five dogs, a portophrenic shunt in three dogs, a portoazygos shunt in one, and a central divisional intrahepatic shunt in one other dog. Based on our results, CE-MRA is a useful tool for imaging abdominal and portal vasculature and for the diagnosis of a PSS. r

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Section: Introductionmentioning

confidence: 99%

Contrast-Enhanced Magnetic Resonance Angiography for Diagnosis of Portosystemic Shunts in 10 Dogs

Bruehschwein

Foltin²,

Flatz

et al. 2010

Veterinary Radiology &Amp; Ultrasound

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“…29,30 This might also be the case in dogs 5,31 ; however, visualizing the portal branches in dogs with portal hypertension to determine whether blood flow was indeed hepatofugal was impossible in any of the dogs in our study. Intraoperative Doppler ultrasonography of the portal branches 32 or angiography by superselective catheterization of a hepatic branch of the hepatic artery would be necessary to reveal whether intrahepatic arterioportal communications are indeed responsible for hepatofugal blood flow in dogs with sustained portal hypertension.…”

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confidence: 99%

Ultrasonographic findings in dogs with hyperammonemia: 90 cases (2000–2002)

Szatmári¹,

Rothuizen²,

Ingh³

et al. 2004

javma

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Objective—To determine ultrasonographic abnormalities in dogs with hyperammonemia. Design—Retrospective study. Animals—90 client-owned dogs with hyperammonemia. Procedure—Ultrasonography of the abdominal vessels and organs was performed in a systematic way. Dogs in which the ultrasonographic diagnosis was a congenital portosystemic shunt were included only if they underwent laparotomy or necropsy. Dogs in which the abdominal vasculature appeared normal and dogs in which the ultrasonographic diagnosis was acquired portosystemic shunts and portal hypertension were included only if liver biopsy specimens were submitted for histologic examination. Results—Ultrasonography excluded portosystemic shunting in 11 dogs. Acquired portosystemic shunts were found in 17 dogs, of which 3 had arterioportal fistulae and 14 had other hepatic abnormalities. Congenital portosystemic shunts were found in 61 dogs, of which 19 had intrahepatic shunts and 42 had extrahepatic shunts. Intrahepatic shunts originated from the left portal branch in 14 dogs and the right portal branch in 5. Extrahepatic shunts originated from the splenic vein, the right gastric vein, or both and entered the caudal vena cava or the thorax. Ultrasonography revealed splenic-caval shunts in 24 dogs, right gastric-caval shunts in 9 dogs, splenic-azygos shunts in 8 dogs, and a right gastric-azygos shunt in 1 dog. Conclusions and Clinical Relevance—Results suggest that ultrasonography is a reliable diagnostic method to noninvasively characterize the underlying disease in dogs with hyperammonemia. A dilated left testicular or ovarian vein was a reliable indicator of acquired portosystemic shunts. (J Am Vet Med Assoc 2004;224:717–727)

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“…() Veterinary Quarterly Szatmari et al . () Journal of Veterinary Internal Medicine Lee et al . () Journal of the American Veterinary Medical Association Lee et al .…”

Section: Resultsmentioning

confidence: 99%

Treatment of intrahepatic congenital portosystemic shunts in dogs: a systematic review

Tivers

Lipscomb

Brockman

2017

J of Small Animal Practice

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The aim of this study was to establish the evidence base for the treatment of intrahepatic congenital portosystemic shunts in dogs through a systematic review of the pertinent literature.Studies were filtered for evidence to answer the question "Which of the treatment options for intrahepatic CPSS in dogs offers the best short-and long-term outcome?" Studies were assigned a level of evidence based on a system published by the Oxford Centre for Evidence-Based Medicine.Thirty-two studies were included in the review. Twenty-six provided level 4 evidence and six provided level 5 evidence. There were no level 1, 2 or 3 studies. One study compared surgical treatment with medical management and one study compared suture ligation with ameroid constrictor placement.The remaining studies were case series describing the outcome for one treatment method alone.Methods and timings of assessments of short-and long-term outcomes were highly varied, making direct comparisons challenging. The evidence regarding the treatment of intrahepatic congenital portosystemic shunts in dogs is weak, with only two studies directly comparing treatments. There is a lack of evidence regarding short-and long-term outcomes on which to base clinical decisions .

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Intraoperative ultrasonography of the portal vein during attenuation of intrahepatic portocaval shunts in dogs

Cited by 15 publications

References 37 publications

Contrast-Enhanced Magnetic Resonance Angiography for Diagnosis of Portosystemic Shunts in 10 Dogs

Contrast-Enhanced Magnetic Resonance Angiography for Diagnosis of Portosystemic Shunts in 10 Dogs

Ultrasonographic findings in dogs with hyperammonemia: 90 cases (2000–2002)

Treatment of intrahepatic congenital portosystemic shunts in dogs: a systematic review

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