Cited 6 times since 2011 (0.4 per year) source: EuropePMC European journal of radiology, Volume 81, Issue 9, 2 1 2011, Pages 2042-2048 Accurate perioperative flow measurement of the portal vein and hepatic and renal artery: a role for preoperative MRI? Vermeulen MA, Ligthart-Melis GC, Buijsman R, Siroen MP, van de Poll MC, Boelens PG, Dejong CH, van Schaik C, Hofman MB, van Leeuwen PA
Background
Quantification of abdominal blood flow is essential for a variety of gastrointestinal and hepatic topics such as liver transplantation or metabolic flux measurement, but those need to be performed during surgery. It is not clear whether Duplex Doppler Ultrasound during surgery or MRI before surgery is the tool to choose.
Objective
To examine whether preoperative evaluation of abdominal blood flow using MRI could prove to be a useful and reliable alternative for the perioperative sonographic approach.
Methods
In this study portal and renal venous flow and hepatic arterial flow were sequentially quantified by preoperative MRI, preoperative and perioperative Duplex Doppler Ultrasound (DDUS). 55 Patients scheduled for major abdominal surgery were studied and methods and settings were compared. Additionally, average patient population values were compared.
Results
Mean (±SD) plasmaflow measured by perioperative DDUS, preoperative DDUS and MRI, respectively was 433±200/423±162/507±96 ml/min (portal vein); 96±70/74±41/108±91 ml/min (hepatic artery); 248±139/201±118/219±69 ml/min (renal vein). No differences between the different settings of DDUS measurement were detected. Equality of mean was observed for all measurements. Bland Altman Plots showed widespread margins. Hepatic arterial flow measurements correlated with each other, but portal and renal venous flow correlations were absent.
Conclusions
Surgery and method (DDUS vs. MRI) do not affect mean flow values. Individual comparison is restricted due to wide range in measurements. Since MRI proves to be more reliable with respect to inter-observer variability, we recommend using mean MRI results in experimental setups.
