CANNULATION SIMULATION

Aspects of the disclosure are directed to methods and/or apparatuses that may facilitate simulation for various cannulation activities. As may be implemented consistent with one or more embodiments herein, an apparatus includes a pliable surface structure having an inner surface and an outer surface, a tube adjacent the inner surface, and a tank configured to hold fluid and to receive fluid exiting from the tube. The tube and pliable surface structure simulate a blood vessel below the inner surface of the pliable surface structure. The tank operates with the tube and the pliable surface to receive a cannula passed through the pliable surface, into the tube and extending into the tank, and facilitates simulated blood flow in the tube below the inner surface of the pliable surface structure via fluid pumped from the tank, through the tube and back into the tank.