Patent ID: 7731500

Claim:
A method comprising: providing a model of an anatomy, wherein said model of said anatomy is a three-dimensional computer model and describes at least a portion of a blood vessel and at least a portion of a skin; providing a model of a medical instrument, wherein said model of said medical instrument is a three-dimensional computer model; providing a set of rules that reflect a correct performance of a medical procedure that comprises a predetermined critical task and a predetermined non-critical task; receiving user input, wherein, at least in part, the input pertains to a stretching of said skin; providing a force-feedback profile that is based on said model of said anatomy and said model of said medical instrument; modifying said model of said anatomy based on a vein rolling, wherein the extent of said vein rolling is based on said input pertaining to said stretching of said skin; simulating an interaction between said model of said anatomy and said model of said medical instrument, based on said user input, said force feedback, said model of said medical instrument, and said model of said anatomy; and assessing the quality of said user input by comparing said set of rules against said interaction.