Heated endovascular catheter injection device

A system comprising:

• a catheter;
• a coiled wire comprising (a)(i) a long axis orthogonal to a short axis, and (a)(ii) two leads to couple to opposite poles of an energy source;
• a thermocouple;
• a shape memory polymer (SMP) foam coupled to a shape memory alloy (SMA);
• wherein:
• (b)(i) in a first configuration a plane orthogonal to the long axis intersects a distal portion of the catheter, the SMP foam, and the SMA and in a second configuration the plane intersects the distal portion of the catheter and a distal portion of the coiled wire;
• and (b)(ii) the coiled wire is not coupled to the SMP foam;
• wherein an outer diameter of the coiled wire is less than 90% of an inner diameter of the catheter.

A system comprising:

• a catheter;
• a coiled wire comprising (a)(i) a long axis orthogonal to a short axis, and (a)(ii) two leads to couple to opposite poles of an energy source;
• a thermocouple;
• a shape memory polymer (SMP) foam coupled to a shape memory alloy (SMA);
• wherein:
• (b)(i) in a first configuration a plane orthogonal to the long axis intersects a distal portion of the catheter, the SMP foam, and the SMA and in a second configuration the plane intersects the distal portion of the catheter and a distal portion of the coiled wire;
• and (b)(ii) the coiled wire is not coupled to the SMP foam;
• wherein an outer diameter of the coiled wire is more than 95% of an inner diameter of the catheter.