Communicating Vessels

Communicating Vessels

 

vessels that are interconnected at the bottom (see Figure 1). When communicating vessels with diameters large enough to negate the capillary effect are filled with the same fluid, the fluid levels are of the same height regardless of the shape of the vessels. This is the working principle of fluid manometers and water-gauges for steam boilers. If the communicating vessels are filled with different fluids, the heights of the fluid columns (measured from the surface where the fluids

Figure 1

are in contact with each other) are inversely proportional to the densities; that is, ρ1h1 = ρ2h2, where ρ1, ρ2, h1, and h2 are, respectively, the densities and heights of the fluid columns. This relation is used to determine the density of a fluid. If, however, one of the legs of the communicating vessels is sealed, then the level difference will depend on the pressure in the sealed leg; this is the working principle of sealed manometers.

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It is the consequence of an unbalanced fetal blood flow through communicating vessels within a shared placenta.
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Quintero RA, Ishii K, Chmait RH, Bornick PW, Allen MH, Kontopoulos EV Sequential selective laser photocoagulation of communicating vessels in twin twin transfusion syndrome.
Kontopoulos EV, Quintero RA, Chmait RH, Bornick PW Russell Z, Allen MH, Percent absent end-diastolic velocity in the umbilical artery waveform as a predictor of the intrauterine fetal demise of the donor twin after selective laser photocoagulation of communicating vessels in twin twin transfusion syndrome.
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When, five years later, Andre Breton cites Heraclitus in The Communicating Vessels (1932), he does so as part of his revisionary efforts to stabilize, rather than unsettle, Surrealism's already tumultuous theoretical grounds.
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