Influence of a mobilization of the mesentery on the hepatic portal vein capacity measured with doppler echo
(2008) 7th International Conference on Advances in Osteopathic Research (ICAOR 7) — Location: (United Sates) Bradenton, FL (5.September.2008)
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- Introduction: Visceral manipulations are widely used among osteopaths, although knowledge regarding the absolute physiological effects has not been clearly established. In this study we evaluated the physiological changes after a manual intervention of a visceral structure in the abdominal cavity: more precisely, we studied the effect of a mobilization of the mesentery on the capacity of the portal vein. Design: Patient- and evaluator-blinded, randomized, experimental study. Methods: A group of 30 volunteers (age 20-45), selected according to specific inclusion criteria, were randomly assigned to a mobilization-technique group (MT) and a non-specific-technique group (NST). On the 15 volunteers in the MT group a mobilization of the mesentery relative to its root was performed, while the 15 volunteers in the NST group received a stretching of the iliopsoas muscle. During the experiment three measurements were performed, one before the MT or NST manipulation, one immediately after having applied the technique and one 60 minutes later. At each time the diameter, the blood flow velocity and the capacity of the portal vein were determined using an echo-Doppler (ATL Philips, HDI 5000, Bothell, USA). Results: The mean portal flow of both groups before interference was 755,71 ml/min; SD = 176,57 (NST group) and 764,38; SD = 359,53 (MT group), immediately after intervention 878,05 ml/min; SD = 227,07 (NST group) and 1079,04 ml/min; SD = 374,24 (MT group). ± 1 hour after intervention, the mean portal flow was 751,51 ml/min; SD = 246,40 (NST group) and 1039,87 ml/min; SD = 281,43 (MT group). Conclusion: A multivariate analysis shows a significant (F(1,28) = 4,726; p = 0.038) higher capacity in the portal vein after mobilization of the mesentery. This study supports the hypothesis that manipulation of visceral organs in the abdominal cavity has a physiological effect. Further studies will be needed to confirm the outcome of this study, and more knowledge is needed regarding the specific mechanisms that are involved with visceral manipulation.
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van Dun, P. L. S., Dobbelaere, E., Dillies, P., Inghelbrecht, F., Van Eeghem, P., Steyaert, L., Danse, E., & Rosseel, Y. (2008). Influence of a mobilization of the mesentery on the hepatic portal vein capacity measured with doppler echo. International Journal of Osteopathic Medicine, 11(4), 160-161. https://doi.org/10.1016/j.ijosm.2008.08.018 (Original work published 2008)