Report on the state of the blood and the blood-vessels in inflammation, and on other points relating to the circulation in the extreme vessels : together with a report on lymphatic hearts and on the propulsion of lymph from them, through a proper duct into their respective veins / by T. Wharton Jones.

  • Jones, Thomas Wharton, 1808-1891.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Report on the state of the blood and the blood-vessels in inflammation, and on other points relating to the circulation in the extreme vessels : together with a report on lymphatic hearts and on the propulsion of lymph from them, through a proper duct into their respective veins / by T. Wharton Jones. Source: Wellcome Collection.

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    gestion with stasis sang%iinis, there is, indeed, also more or less hyperemia or simple vascular fulness in the parts adjacent to the focus of the inflammation, as I explained in my Essay in ' Guy's Hospital Eeports,' in correction of the assumption that an increased quantity of blood flows in the vessels of the part which is the focus of the inflammation, whereas stasis sanguinis actually exists in them. § 11. It is to the cardiac impulses on the blood, flowing in the said relaxed arteries, dilated by distension, against the focus of inflammatory congestion, that throbbing is owing. This throbbing used to be considered a mani- festation of a supposed heart-like propulsive action of the arteries. Coincident with the throbbing, and owing to the same cause, is the microscopically observable phenomenon of oscillation of the yielding but otherwise stationary mass of agglomerated and stagnant red corpuscles within the vessels. Though so obvious in respect to its incidental nature, this oscillation is often spoken of as something special in the inflammatory process. It is to be noted that the cardiac impulses under notice are not so strong as commonly supposed they should be under the influence of the degree of vis a tergo in operation, because much of this force is already expended on streams in branches that arise from the arterial trunk higher up and pour blood into extreme vessels in which the circulation is as yet free. § 12. The mistake that the flow of blood becomes slower in dilated arteries arose from confounding the dilated artery under observation as a channel receiving the stream from a narrower one, whereas, in the case in question, the flow is still from a wider channel, though into one become less narrow than before and, therefore, merely offering a less degree of impediment to the stream. We sometimes, indeed, see in the course of our observations on the phenomena of the circulation in the web of a frog, an artery with its calibre wide at one place and narrow at another alternately, in which very obvious retardation of the flow takes place when the blood is received into the wider from the narrower parts of ' the channel, while acceleration of the flow is seen when the