. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. DIGESTION IN THE SMALL INTESTINE. 401 •was first employed by de Graff on the dog, and has proved successful in the hands of Leuret and Lassaigne on the horse. As before stated, the operation as performed as above described does not render the permanent collection of this secretion possible. It lias been found that when permanent fistula: are established, although they serve a useful purpose in permitting the study of various conditions which may modify the secretion of pancreatic juice, yet the fluid poure
. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. DIGESTION IN THE SMALL INTESTINE. 401 •was first employed by de Graff on the dog, and has proved successful in the hands of Leuret and Lassaigne on the horse. As before stated, the operation as performed as above described does not render the permanent collection of this secretion possible. It lias been found that when permanent fistula: are established, although they serve a useful purpose in permitting the study of various conditions which may modify the secretion of pancreatic juice, yet the fluid poured out by the glands under these circumstances cannot at all be regarded as its normal secretion. For the purpose of establishing a permanent pancreatic fistula, a small clog may be selected, since in small animals the pancreas is nearer the middle line than in large dogs, and hence the parts are not as much disturbed by the operation. The dog having been kept fasting for twenty-four hours, so that the pancreatic vessels should contain as little blood as possible, should be narcotized by a subcutaneous injection of morphine, and the ab- domen opened by an incision about two centimeters long made in the linea alba and about midway between the xyphoid cartilage and umbilicus. The duodenum and the. Fig. —Pancreatic Fistula in the Doo. (Bernard.) A, cannula on which is fastened the rubber bulb. E ; C, stop-cock. pancreas are then to be drawn out of the wound and the pancreatic duct isolated and opened by a little cut in one side; instead then of inserting a cannula, two pieces of lead wire bent at an angle are to be introduced, one wire being passed toward the gland and the other into the intestine ; the remaining halves of each wire are then to be twisted together so as to form a T-snaPecl piece, the middle limb of which projects through the wound. Owing to the shape, the wires cannot fall out and cannot move around in the duct. Fine wire should be selected somewhat smalle
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