Electroosmotic characteristics of canine aorta and vena cava wall.

Experiments in which canine aorta and vena cava walls are subjected to electroosmosis in an open system at constant pressure are described. Electroosmosis reveals that the blood vessel walls studied have a negative zeta potential. The calculated zeta potentials are different for aorta and vena cava, -9.0 +/- 5.0 mv compared with -4.7 +/- 1.2 mv, respectively, and again of different magnitude with different bathing solutions. The calculated membrane pore charge per centimeter of effective pore surface in statcoulombs is approximately 6.2 x 10(3) for aorta compared with 3.5 x 10(3) for vena cava. The implications of the negative electroosmotic zeta potential in terms of the surrounding electric double layer, ion transport, and thrombosis are briefly discussed.