Detecting insertion of needle into simulated vessel using a conductive fluid

A method for training a user to insert a medical device to a desired target position within a body of a person undergoing a medical procedure, the method comprising:

• (a) providing a medical trainer simulator that contains at least one simulated body lumens and which simulates a portion of an actual body where the desired target position is disposed, one or more of the at least one simulated body lumens including a conductive fluid simulating a bodily fluid being disposed at the desired target position within the medical training simulator;
• (b) receiving and monitoring, by a computing device, an output signal from an electrical resistance measuring circuit, the computing device including a processor and machine executable instructions, the electrical resistance measuring circuit being electrically coupled to the conductive fluid contained in the at least one of the simulated body lumens and to the medical device that is to be inserted, wherein the electrical resistance measuring circuit is configured to produce an output signal indicative of an electrical resistance between the medical device and the conductive fluid;
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• (c) determining, by the computing device, that the medical device has been inserted into the at least one simulated body lumen in which the desired target position is disposed based on the output signal received, and to provide a human perceptible indication when the medical device has been inserted into the at least one simulated body lumen in which the desired target position is disposed;
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• (d) providing a human perceptible indication when the medical device has been inserted into the at least one simulated body lumen in which the desired target position is disposed.