A device for transmitting intravenous fluids between a patient and an external reservoir is provided with a retractable needle for penetrating an intravenous fluid port or for directly penetrating the skin of the patient. The retractable needle renders the device safe for disposal after use. The...http://www.google.com.au/patents/US5685863?utm_source=gb-gplus-sharePatent US5685863 - Retractable needle apparatus for transmission of intravenous fluids
