Designing and Prototyping a medical device

Hello, We are looking for people with experience of converting an idea into a prototype. We have been working on creating a prototype of a medical instrument similar to an endoscope, and have already received government grant for patenting it. However, we need someone with experience in the domain who can help us in coming up with the design. We have already figured out the camera and electronics part of the scope. The mechanical designing part is left. For eg. two major challenges we're facing: - How the tube should be designed so that there is one channel for water and another channel for camera module - If one end of the tube is inside patient, how can its tip be rotated from the other end using some turning mechanism Preferably, the freeancer should be based out of Delhi, India. Please provide details of any project where you've done the complete designing Thanks