Diagnostic systems and methods including temperature-sensing vascular devices

A diagnostic system, comprising:

• a catheter assembly including:
• a catheter tube defining at least one lumen extending between a proximal end and a distal end;
• a hub operably attached to the catheter tube;
• an extension leg operably attached to the hub, the hub and the extension leg defining at least one fluid passageway in fluid communication with the at least one lumen of the catheter tube;
• and
• a plurality of temperature sensors disposed within the catheter tube including a primary catheter-tube temperature sensor and a secondary catheter-tube temperature sensor proximal of the primary catheter-tube temperature sensor for determining malposition of the catheter tube in a vasculature of a patient, each temperature sensor of the primary and secondary catheter-tube temperature sensors configured for temperature measurement in the catheter tube;
• a console configured to communicate with the catheter assembly, the console including memory, a processor, and a proportional-integral-derivative (PID) controller,
• wherein the PID controller is configured to maintain the primary catheter-tube temperature sensor at a set temperature, and monitor an amount of power utilized in maintaining the primary catheter-tube temperature sensor at the set temperature, wherein the amount of power utilized is proportional to blood flowrate, and wherein blood flowrate is indicative of catheter placement or catheter malposition, and
• wherein the processor is configured to measure a blood temperature with the secondary catheter-tube temperature sensor as the catheter tube is moved through the vasculature, wherein a first blood temperature indicates movement in a direction against blood flow, wherein a second blood temperature elevated in relation to the first blood temperature indicates movement in a direction with blood flow, and wherein determining whether the catheter tube is moving in the direction against blood flood or in the direction with blood flow is indicative of the catheter placement or the catheter malposition;
• and
• a display screen configured to communicate with the console, the display screen configured to display a graphical user interface (“GUI”) including at least a temperature reading associated with the plurality of temperature sensors.