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.

    899/956 (page 865)
    APPENDIX. DIRECTIONS FOR MAKING DRIED PREPARATIONS OF THE ARTERIES AND VEINS. ALTHOUGH in every anatomical schoo] competent persons are retained for the purpose of injecting arteries and veins, still the student may wish to do it for himself, or he may be placed in such situations that he cannot command any kind of assistance; to him, more particularly, the few remarks which we purpose making on the method of inject- ing and of preserving arterial preparations, may be considered appli- cable. Injections are of two kinds, coarse and fine; there are many de- scriptions of coarse injections; with the fine we have nothing to do, as it is used by anatomists only for the purpose of imitating the natural vascularity which membranes and other structures lose after death. Coarse injections may be employed either hot or cold : formerly the hot injection was the only one used, but now the cold one is very frequently employed. As much of the success of the injection depends on the state of the subject, great care should be observed in the choice; if possible a young and thin one should always be employed, as the arteries in old subjects are so often ossified and inelastic, that we can never be certain that they will not burst from the force em- ployed, and extravasate the injection between the muscles and into the different cavities: another objection to the use of old subjects is, that the constant oozing of oily matter from preparations made of them renders them filthy, and almost useless, particularly in warm weather ; however, some old subjects may be filled with the cold (or paint) injection, if care be taken not to use too much force. When the student has made up his mind to employ the hot injection, it may be useful to him to follow a few rules. In the first place, the pipe _ should be tied so firmly in the opening into the vessel, that there will be no possibility of its slipping out; secondly, the nozzle of ‘the syringe should always be introduced into the pipe, for the purpose of exhausting the artery of air or coagulated blood; this being done, the stopcock should be immediately turned; and lastly, particular care should be taken that the syringe, pipe, and stopcock, are free and in good order. 3K -