Portal Vein Dopplerflowmetry in healthy sheep according to age

Abstract

RESUMO.-[Dopplerfluxometria da veia portal em ovinos hígidos de acordo com a idade.] A ultrassonografia com Doppler pulsado foi utilizado para avaliar o fluxo sanguíneo portal, velocidade portal e índice de congestão portal em 24 ovinos saudáveis divididos em grupos (cordeiros, borregos e ovelhas), de acordo com a idade. As medições foram realizadas no 11 o espaço intercostal direito utilizando ângulo de insonação ideal e método de inclusão uniforme. Os valores médios obtidos em cada grupo foram comparados com ANOVA, seguido pelo teste post-hoc de Tukey. A velocidade portal e o fluxo de sangue portal foram estatisticamente semelhantes entre os grupos (P>0,05). A velocidade portal média foram 17,75; 17,13 e 16,75; enquanto o fluxo de sangue portal médios foram 26,65; 31,04 e 24,32 para cordeiros, borregos e ovelhas, respectivamente. O índice de congestão portal foi estatisticamente diferente entre os grupos e os valores para cordeiros, novilhos e ovelhas foram 0,009; 0,058 e 0,09, respectivamente (P<0.01). Observaram-se diferenças estatísticas nos diâmetros da veia porta, na área da veia porta e nos índices de congestão portal entre os grupos, provavelmente devido à influência do peso e não pela idade. TERMOS DE INDEXAÇÃO: Doppler, fígado, ovinos, ultrassonografia, veia porta.

Characterization of the Normal Portal and Hepatic Blood Flow of Adult Holstein-Friesian Cows

“…Therefore, we should not refer to “pulsatility” of the portal vein, as the flow is not pulsatile, and the variations must be caused by changes in abdominal pressure (i.e., respiratory cycle) and in the amount of blood emitted by the gastrointestinal tract and spleen. Furthermore, based on studies in humans [22], sheep [23], and cattle [2,6,24,25], the portal blood flow depends on posture, physical activity, feed intake, age, and milk yield, which also influence the size and thickness of the liver as body weight does. The correlation between stage of pregnancy and diameter of the portal vein may also influence the portal blood flow [25].…”

Reference values and repeatability of pulsed-wave Doppler flowmetry of portal vein in healthy dromedary she-camels

“…In our work, the mean PV velocity was 12.3 ± 3.2 (cm/sec), with a range of 6.35–21.8 cm/sec. It has been reported that the mean velocity of portal blood flow decreased in dogs with chronic hepatic diseases, portal hypertension, and cirrhosis [ 8 , 7 ]. There was a non-significant correlation ( p = 0.647) between the animals’ PV mean velocity and body weight in this study.…”

“…Portal vein (PV) is the main vessel with a high percentage of total blood supply of hepatic circulation, so it is the most affected vessel by hepatic lesions [ 8 ]. The establishment of the reference values for portal flow parameters using pulsed-wave (PW) Doppler is essential in the interpretation and diagnosis of many hepatic diseases [ 9 ].…”

Ultrasonography and biochemical studies of hepatobiliary system in buffaloes

“…Sangwan (2015). Various studies in humans (Abu-Yousef, 1992), sheep (Belotta et al, 2017), and cattle (Starke et al, 2011;Braun and Gerber, 1994), show that the portal blood flow depends on posture, physical activity, feed intake, age, and milk yield, which also influence the size and thickness of the liver as body weight does. The mean value of SVp, EDV, Vmn (cm/s), for CVC were slightly lower than the mean value reported by Sangwan (2015).…”