30 
J. C. MYERS, .tR. 
PARENCHYMATOUS AND INTERSTITIAL 
INJECTIONS. 
By J. C. MYERS, Jr., D.V.S. 
Read before the United States Veterinary Medical Association. 
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Concerning this important method of surgery, which is occa¬ 
sionally mentioned in the practise of human medicine, we really 
can find but little or nothing in veterinary literature, so that it 
may be quite proper to draw the attention of the veterinary fra¬ 
ternity to the advantages that can be obtained in the surgical de¬ 
partment with the injection of medicines into the intimate struc¬ 
tures of the afflicted tissues. Their local effect depend much 
upon the affinity between the certain agents injected, and the 
character of tissues it is intended to act upon. In accordance 
with this view of modus opemndi the desired effect must be ob¬ 
tained by the most suitable agents in the treatment of the disease. 
If it be a phlegmonous tumor, a powerful irritant or suppurant is 
required, to set up a violent inflammation with a view of break¬ 
ing down the enlargement into pus, and, when discovered, evacu¬ 
ated. If, on the other hand, there is a lack of vitality in the tis¬ 
sues or blood-vessels, producing atrophy of the connective tissues, 
a gentle stimulant is required, to excite the cells merely sufficient 
to produce an undue cell activity without driving it far enough to 
break the cells down into pus. This design is simply to reani¬ 
mate their impaired functions. A lack of nervous force is also 
aroused by these and similar agents. But when there is an ex¬ 
cess of nervous irritability, as in neuralgia, the reverse class of 
remedial agents are indicated to combat the disease, such as anaes¬ 
thetics, anodynes, and the like. Again, there may exist a hyper¬ 
trophy of glandular or osseous structures where no abscess is 
anticipated. In these cases absorbents are the choice agents. 
We often seek to establish healthy action in some malignant 
forms of disease. With this view we adopt as a portion of 
the treatment, the interstitial administrations of antiseptics, as in 
gangrene, anthrax, and anthro-coid diseases, where its efficient 
validity can be thoroughly tested. There is also another class of 
