Catheters; needles for medical purposes; surgical devices and instruments; electromagnetic medical diagnostic imaging apparatus; medical devices, namely, surgical devices that facilitate the identification, separation or ablation of biologic tissues; medical device and surgical instrument for use in diagnosis and surgery of the gastro-intestinal tract; medical devices for placing and securing catheters; medical devices to treat intravascular sites; medical device for accessing subcutaneous structures of the human body for the purpose of administering medical treatment; medical devices and apparatus, namely, ultrasound imaging apparatus, scanners and needle guides, and parts and fittings therefor