During the acute attack, the vitreous may become slightly turbid by transudation of serum from the vessel of the ciliary body and the chorioid and may become filled with fibrin.
There is edema of the ureal tract, apparently from transudation of serum.
The vital reaction induced by such irritation results in dilatation of the vessels of the part, emigration of leucocytes, transudation of lymph, and certain proliferative changes in the fixed tissue cells.
The protective effects of the inflammatory reaction depend for the most part upon the transudation of lymph and the emigration of leucocytes.
The pressure upon the walls of the blood-vessels cannot become sufficiently increased to be accompanied with augmentedtransudation until limits are reached which are beyond the possibilities of occurrence in the human body.
There is no increased transudation corresponding with the quantity of fluid introduced, nor is there any considerable distension of the blood-vessels of the skin, subcutaneous or intermuscular connective tissue.
Dropsy arises when the transudation is accumulated.
The remote parts become swollen, from the distension of the vessels with blood and the transudation of liquid, and eventually solid material from the blood.
This distension results from the continuance of the arterial flow into the capillaries of the obstructed region under a pressure which is only neutralized by the resistance of the tissues and the transudation from the capillaries.
The transudation through the vessels takes place chiefly through those with the thinnest walls, the capillaries, although it is probable that a certain degree of transudation may also occur through the walls of the smallest veins.
The exterior of the body after death in the early stages of this disease almost always presents the marks of transudation of the contents of the blood-vessels.
The inference from these experiments is that an increased transudation is more dependent upon conditions of the filter than upon those of blood-pressure.
In those who die in coma, preceded by delirium or convulsions, during the eruptive stage, the intracranial congestion is usually marked, with perhaps some transudation of serum, but without inflammatory lesions.
The constant removal of the transudation from the outer side results from the pressure being less in this position.
This form has usually been attributed to increased transudation from arterial congestion or venous stagnation.
Transudation of serum into the intestinal tube follows.
Given a certain obstacle to the passage of the blood through the liver, transudation will be the more prompt to appear the greater the anaemia.
As the transudation continues the thirst becomes intense, the tongue cold, dry, and coated, and the tissues shrivelled from loss of water.
Coincidently with the occlusion of the portal vein the gastro-intestinal mucous membrane becomes the seat of a catarrhal process, and to the fluid thus produced is added a much more abundant transudation from the distended capillaries.
Drastic purgatives act as irritant poisons in producing acute hyperaemia of the mucous coat with excessive transudation of serum; or, in other words, an acute catarrh.
A transudation of serum takes place into the mucous layer, and in more marked congestion into the submucous layer also; these tissues become more or less oedematous and swollen.
This is followed by the formation of a coating of coagulated fibrin on the diseased pleura and the transudation of serum which collects in the chest.
