Therapeutics of the circulation : Eight lectures delivered in the spring of 1905 in the physiological laboratory of the University of London / by Sir Lauder Brunton.

  • Brunton, Lauder.
Date:
1908
Catalogue details

Licence: In copyright

Credit: Therapeutics of the circulation : Eight lectures delivered in the spring of 1905 in the physiological laboratory of the University of London / by Sir Lauder Brunton. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    the pauses serve for recuperation of their muscular walls. The intermitting rest is certainly of great value to the vascular walls, for when they are subjected to continuous pressure they are injured and allow fluid to exude into the tissues and produce oedema. On the other hand, when the flow is rhythmically interrupted, very little oedema appears icf. p. 126). The cardiac pulsation acts like an internal massage, and by producing passive gymnastics maintains the cohesion, elasticity, and con- tractility of the arteries. Circulation in the Splanchnic System.—In 1889 Kronecker showed at the Naturforscherversammlung, in Heidelberg, that normal saline solution flows readily into the portal venous system of a rabbit under a pressure equivalent to 30 centimetres of water. When the portal vein is ligatured close to the hilus of the liver, the saline solution only begins to enter under a pressure of 60 centimetres. But if the abdominal aorta is ligatured close to the diaphragm, and above the abdominal arteries, the veins become paralysed, and allow enormous quantities of saline solution to flow into them under a very low pressure.
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