SIMPLIFIED TECHNIQUE FOR HYPOPHYSECTOMY OF THE DOMESTIC FOWL

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Abstract
The survival of adult chickens following hypophysectomy by the transbuccal method has been found, in my own experience, to be comparatively low, though not as low as has been reported by Hill, Corkill and Parkes (1934). The first week after hypophysectomy, in particular, is the period of most severe losses. Since the trauma associated with the operation seemed to be primarily responsible for these losses a less traumatic technique was looked for; this was found in the oral approach2 to the pituitary, which White (1933) used successfully on rabbits. This approach makes for a faster, simpler, and cleaner operation than the one using the transbuccal approach. Early mortality (in the first to second postoperative weeks) was considerably less (Rothchild, 1948) than that following the transbuccal method, although total mortality was practically the same by both methods. The details of the method follow:

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