A catheter for conveying flowables in or out of the body, be they gases or liquids. The catheter has a triangular lumen and optional auxiliary structures. One optional element is guide engaging for employing a guide for placing the catheter. Another element is a secondary lumen disposed within the wall of the tube. The camera and lighting devices at the tip of the catheter are mounted on a partially flexible PCB and packaged in the tube permitting all elements to point substantially forwards.
