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Updated: May 25, 2025
In addition to the foregoing list which is by no means complete there are several combinations of operations, as, for example, the Fergus trephining operation, which is really a combination of a sclero-corneal trepanation and a cyclodialysis.
Second: The object of trephining is to tap and permanently drain the aqueous fluid from the anterior chamber of the eye into the sub-conjunctival space; in doing so it is essential to avoid as far as possible all interference with the uveal tissue. The purpose of an iridectomy is to avoid the danger of the iris in the neighborhood of the wound being drawn and impacted in the trephined hole.
In horses, inflammation of the alveolar membrane results in a bony enlargement on the side of the face if the superior molar is involved. Fistula of jaw. The treatment consists in the prompt removal of the tooth. This is more difficult in young animals than it is in the middle-aged or old. Unless the tooth is already loosened it may be necessary to remove it by trephining.
Furthermore, there is no sufficient reason why the field of usefulness of the operation should be confined to the chronic forms of glaucoma, and Col. Elliot unhesitatingly recommends trephining as safer and more efficient than any other operative procedures at present employed for the relief of acute glaucoma.
Croton oil dropped on the tongue will also be of great benefit: if there should be effusion or compression from fracture of the bones of the cranium, nothing but trephining will be of any service, as we can hardly hope for the absorption of the matter, and the removal of the spicula of bone can alone afford relief to the patient.
This being the case one cannot truthfully say that trephining alone can take the place of the old Graefe iridectomy. On the other hand, trephining may with advantage be employed instead of iridectomy for cases difficult or dangerous under the latter method.
"I took the opportunity to examine the scars on his head thoroughly. I've always thought Dick was a very interesting case from a medical point of view. Lately I've been studying the history of trephining and the cases where it has been employed.
I counted myself lost, and in view of the Doctor's words, studied the progress of the experiment with frightful interest. But a few moments sufficed in which to realize that, for all my training, I knew as little of Chemistry of Chemistry as understood by this man's genius as a junior student in surgery knows of trephining.
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