Catheters; Electromagnetic medical diagnostic imaging apparatus; Medical device and surgical instrument for use in diagnosis and surgery of the gastro-intestinal tract; 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; Medical devices for placing and securing catheters; Medical devices to treat intravascular sites; Needles for medical purposes; Surgical devices and instruments; Medical devices, namely, surgical devices that facilitate the identification, separation or ablation of biologic tissues