Influence of Respiration and Portal Pressure on Transabdominal Duplex Doppler Ultrasound Measurement of Portal Blood Flow: A Porcine Model for Experimental Studies

Duplex Doppler Ultrasound Examination of the Portal Venous System: An Emerging Novel Technique for the Estimation of Portal Vein Pressure

“…However, inter-observer variation can be reduced to a minimum by a cooperative training program [22]. Portal blood flow has been shown to vary significantly at the end of inspiration compared to at the end of expiration [23,24]. Therefore, it is imperative to formulate a standardized protocol for performing DDUS ( Table 2).…”

Portal Vein Pressure Change Predicts Posthepatectomy Liver Failure Following Right Lobectomy

“…The mean patient age was 64.1 6 8.1 years and 60.1 6 12.7 years for the uncomplicated and PHLF groups, respectively, a difference that was not statistically significant. There were also no significant intergroup differences regarding preoperative albumin level, total bilirubin level, aspartate aminotransferase (AST), alanine aminotransferase (ALT), platelet count, prothrombin activity, or ICGR 15. Diabetes was present in 18% (4/22) of patients in the uncomplicated group and 31% (4/13) of patients in the PHLF group.…”

“…[9][10][11] Additionally, some reports have suggested that a moderate PVP elevation is necessary to regenerate liver tissue, 11,12 although abnormally elevated PVP and decreased portal blood flow can result if a large portion of the liver is resected. [13][14][15] On the other hand, other studies have reported that elevated PVP is a risk factor for PHLF [16][17][18] and that the long-term prognosis is poor for patients with an elevated postoperative PVP. 19 In addition, one study reported that a postoperative PVP .20 cmH 2 O is a risk factor for PHLF 20 ; thus, some researchers have attempted the use of simultaneous splenectomy to decrease postoperative PVP, which resulted in fewer complications and improved hepatic functional reserve.…”