Avaliação morfométrica e hemodinâmica comparativa dos vasos envolvidos no shunt portossistêmico congênito em cães

Abstract

Pesq. Vet. Bras. 32(9):941-946, setembro 2012 941 RESUMO.-Foram realizados o estudo morfométrico e o estudo hemodinâmico da veia porta em vinte cães clinicamente normais, de idade igual e inferior a 120 dias e em quatorze cães portadores de shunt portossistêmico, de idades entre 90 e 360 dias. Nos cães do grupo controle, as margens hepáticas apresentaram-se entre 1,50cm e 3,00cm caudalmente à margem costal. Os diâmetros médios da veia porta (VP), veia cava caudal (VCC) e aorta abdominal (AO) obtidas foram respectivamente, 0,38cm, 0,37cm e 0,41cm. As proporções entre os diâmetros médios VP/ The morphometry and haemodynamic aspects of portal vein were studied in 20 normal dogs with less than 120 days of age and in 14 dogs presenting portosystemic shunting with ages between 90 and 360 days. In the control group the hepatic margins were seen 1.50cm to 3.00cm caudal to the costal margin. Collected data indicated that the mean diameter of portal vein (VP), caudal vena cava (VCC) and abdominal aorta (AO) measured respectively, 0.38cm, 0.37cm and 0.41cm. The VP/VCC and VP/AO mean ratios were respectively, 1.10 and 0.94. The average of VP, VCC and AO areas were respectively, 0.12cm 2 , 0.11cm 2 and 0.14cm 2 . The haemodynamic of portal vein was studied by ultrasound Doppler and the mean velocity of portal blood ϐlow (VMFSP) measured was 17.76cm/s. It was veriϐied that portal blood ϐlow (FSP) average was 83.11ml/min/kg and the congestion index (IC) average was 0.006. In the group of animals presenting portosystemic shunting, the hepatic margins were seen 1.00cm to 2.00cm cranial to the costal margin. The morphometry of VP, VCC and AO presented a mean diameter of 0.40cm, 0.74cm and 0.56cm, respectively. The VP/VCC and VP/AO mean ratios were respectively, 0.54 and 0.69. The average of VP, VCC and AO areas were respectively, 0.

Ultrasonography and portography in the diagnosis of shunt portoazigos in a dog - case report

“…In the present report, the Doppler ultrasonographic examination was effective at diagnosing PSS, which reaffirms what was said by D' Anjou et al (2004) and Lamb (1996) regarding the high sensitivity and specificity of the test in the diagnosis of portosystemic deviations. Ultrasound shunt measurement was also possible, as described by Kamikawa and Bombonato (2012), which was important for choosing the exact ameroid ring diameter for the surgery.…”

“…In the present report, the animal presented PV´s flow velocity of 11.2cm/s, reaffirming what was said by Kamikawa and Bombonato (2012) in which animals with PSS can have normal PV´s flow velocity, ruling out the possibility of portal hypertension. It is important to diagnose portal hypertension to differentiate congenital PSS from the acquired, since the treatments differ (Faverzani et al, 2003).…”