Effects of Lymphangion Subdivision in a Numerical Model of a Lymphatic Vessel

Author:

Bertram Christopher D.1,Macaskill Charles1,Moore James E.2

Affiliation:

1. University of Sydney, Sydney, NSW, Australia

2. Texas A&M University, College Station, TX

Abstract

We have recently reported development of a lumped-parameter model for several lymphangions in series [1]. The model provides for both active smooth muscle contraction (intrinsic pumping) and passive compression of the lymphatic by external tissues (extrinsic pumping). The valves which define the lymphangions vary their resistance sigmoidally, having a high (low) resistance for an adverse (favorable) pressure difference. With no refractory period between sinusoidal active tension episodes, maximum pumping efficiency was reached when each lymphangion contracted 135° after that immediately upstream; simultaneous contraction (corresponding to the situation of extrinsic pumping) was especially inefficient.

Publisher

American Society of Mechanical Engineers

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