A medical retrieval device for retrieving foreign objects from a patient and the method of constructing the device are disclosed. The first circuit may cause the load to have a substantially non-reactive impedance when the first circuit is enabled. The method also includes selecting a second set of the software development practices to model as a to be plan, where each of the software development practices has a configurable DRE for the to be plan. 5-4%Cr=2-5%Al=1-2%Mo+W2=1-4%V=traces-0.