Unfortunately, many varieties of medical tubing are interchangeable and easily connectable. This means that it is very simple to misconnect a feeding tube to an intravenous line, or IV fluids to an oxygen tube. With nurses working overtime or covering too many patients at once, it is all too easy to connect a tube improperly, often times leading to a fatal outcome for the patient. There have been reported cases where a spinal anesthetic used for pain relief during childbirth was mistakenly put into a vein, killing the patient. In another instance, a healthy young pregnant woman and her unborn daughter died after a feeding tube was mistakenly connected to an intravenous line, sending the liquid food directly into her veins.