THE OPERATION OF INTRODUCING THE CATHETER may be performed by the educated nurse. The patient being placed upon her back and the labia separated, the point of the forefinger of the left hand should be placed just within the orifice of the vagina so as to press slightly the upper edge; the catheter should then be passed along the inner surface of the finger until it is arrested by the anterior part of the vagina; when there, a very slight movement so as to elevate the point of the instrument a little, enables the operator in the majority of cases to enter the catheter into the canal. The operation is more difficult when the parts are swollen or distended, as happens occasionally from disease, during pregnancy or labor, or after delivery. If we cannot detect the orifice by the touch, we may use a light, and the patient may be placed on her side. We may adopt another way to proceed. The point of the forefinger finds the clitoris, and passes from above downwards to the middle of the vestibule; the first inequality met with is the orifice of the urethra, into which the instrument can then be passed. It will easily slide in if the instrument is not passed either to the right or the left of the median line. When a woman who has previously suffered from prolapsis becomes pregnant, it is sometimes necessary for her to keep the horizontal position during the first three or four months of pregnancy, and after her confinement she should keep her bed a considerable time—perhaps for two months. For the treatment of prolapsis in non-pregnant women, the general principles are to be applied: To afford artificial support to the superincumbent abdominal viscera; give tone to the broad and round ligaments of the uterus, to the vaginal walls and the perineum; and to remove any complications that induce the falling, such as uterine congestion, hypertrophy, cough, constipation, etc. The uterus may usually be easily pushed back to its place when the patient is lying down, or, what is better, her head much lower than her pelvis. (Fig. 13). The knee-chest position is the best one.