I need a Biomedical Engineer Consult in Los Angeles...

I'm looking for an engineer in the medical field to confirm the accuracy, utility, and feasibility of a prototype I am creating. I would need an NDA signed before getting into detail as I am awaiting my provisional patent. It is device for patients in chemotherapy that utilizes cryogenic technology/scalp cooling therapy. Materials used may include copper tubing, a cooling unit that can reach -41 degrees, and silicone. I would like to bring the prototype to you to explain the concept and get medical grade technology clearance before advancing with the patent and production. Thank you :)