=Hæmorrhage.= However carefully an operation may be conducted or whatever material may be employed for ligatures, there is a liability of bleeding after the patient has been returned to bed. Severe internal bleeding is usually due to the slipping of a ligature from an ovarian pedicle, or a uterine artery: it may come from a vaginal artery, especially in total hysterectomy, and occasionally from a vessel in an adhesion which has been missed in the course of the operation, for oozing which is scarcely appreciable when a patient is collapsed may become very free when reaction occurs. Severe internal bleeding is manifested by very obvious signs: pallor, cold skin, rapid but feeble pulse, restlessness, and sighing respiration. When these symptoms are manifested the wound must be reopened, the blood and clot removed, and the bleeding point secured. It often happens, where the bleeding is due to the slipping of a ligature from the uterine or ovarian artery, that by the time the surgeon reopens the wound the patient is so bloodless that there is difficulty in determining the source of the bleeding. In very bad cases it is a wise plan to arrange for an assistant to perform the intravenous infusion whilst the surgeon deals with the bleeding vessel. (See Vol. I, p. 405.) Intravenous injection is the best method of treating patients when the loss of blood has been great. It is unwise to transfuse more than three pints into the veins, or the lungs will become waterlogged and the patient will be later in great peril. When the loss is moderate in amount and the patient is not greatly enfeebled, a pint or more of saline solution may be poured into the abdomen before closing the incision, and this may be supplemented by the administration of six or more ounces of the solution by the anus at two-hourly intervals until the force of the circulation is restored. In some instances the subcutaneous injection of normal saline solution may be employed. A suitable region is the loose tissue under and around the breasts. When this method is adopted the skin should be rendered antiseptic, otherwise troublesome abscesses and cellulitis will arise in the subcutaneous tissue at the situation where the saline solution has been injected.