Percutaneous procedures to divert blood flow from one blood vessel to another can be performed with intravascular catheters but demand a method to align a crossing needle from one vessel to another. Fluoroscopic imaging alone is not adequate. and it is preferable to have a sensor on one catheter that detects the correct alignment of an incoming needle. This can be implemented by gener... https://www.roneverhart.com/AMS-Neve-1073SPX-Single-Preamp-and-EQ-p33827/