Copy 1

The Dublin dissector or manual of anatomy / By R. Harrison.

  • Robert Harrison
Date:
1847
Catalogue details

Licence: Public Domain Mark

Credit: The Dublin dissector or manual of anatomy / By R. Harrison. Source: Wellcome Collection.

    901/956 (page 867)
    If we wish to trace the minute branches of arteries and examine their various communications, there are no injections better adapted. for common purposes than that of tallow and red lead well mixed and heated, or the cold paint injection ; if the latter be well thrown in, the minutest arteries, for instance the ciliary, will be injected. It is made of— White lead, well ground, 2]bs. Turpentine Varnish, 3xii. Drying Oil, 3vi. The lead is intimately mixed with the varnish, and then the oil is to be added; they are all to be well mixed up together, to the consistence of cream, and in this state it is to be thrown into the arteries; the same precautions, with regard to the exclusion of air from the syringe, and the degree of force to be used, are to be observed in this as well as in the hot injection. Arteries are always injected from the aorta or some other large trunk; while veins are injected differently. In making preparations of veins, it is necessary to inject them from the extreme branches towards the trunks, on account of the direction of the valves; for instance, the veins of the arm are to be injected from a small branch on the back of the hand, and those of the leg and thigh from some branch on the dorsum of the foot. Previously to the injection being made, it is necessary that the veins should be well washed out with warm water, to remove the coagula of blood which they generally contain. If the veins of the arm are to be injected, an opening should be made in the subclavian vein, to allow the warm water and coagula to pass out; when this has happened, a ligature, previously applied, is to be firmly tied round the vessel, which will prevent the injection from flowing out; the same rule applies to the injection of veins in the lower extremity. The veins of the head and neck are generally injected from the superior longitudinal sinus. It is scarcely necessary to mention that veins are filled with blue fluid, and the arteries with white or red; for the blue injection smalt blue is usually employed. To inject the arteries a transverse cut is to be made in the aorta, as close to its origin from the heart as possible. Care must be taken that the extremity of the pipe does not project so” far as to pass into the innominata, or one of the vessels arising from the left side of the arch, as this would give only partial injection. The nozzle of the pipe being carefully inserted into the opening of the vessel, two pieces of twine are to be introduced under the vessel ; one of these is to be firmly tied round the artery, this will embrace the nozzle of the pipe; its loose extremities, when the knot is firmly tied, are to be fixed to the wings of the pipe, in order to prevent any chance of its slipping out of the vessel. The other ligature is to re- main loose under the vessel, beyond the nozzle of the pipe about one inch. After injection is thrown in, this ligature is also to be firmly tied round the vessel, leaving the pipe clear; the use of it is, that the injection may not return back when the pipe is removed from the