A tissue treatment device, comprising: a power source; an elongate shaft having a distal end; a heating element disposed at the distal end of the shaft, the heating element having a proximal end and a distal end; a first electrical pathway extending between the power source, the proximal end of the heating element, and the distal end of the heating element, and defining a first treatment length extending between the proximal and distal ends of the heating element; and a second electrical pathway extending between either: the power source, the distal end of the heating element, and an intermediate point along the heating element intermediate the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the distal end of the heating element, or the power source, the proximal end of the heating element, and an intermediate point along the heating element between the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the proximal end of the heating element, wherein the power source is configured to automatically distinguish between the fist and second treatment lengths (L1, L2, L3) and to adjust a level of power delivery based on whether the power source is delivering power to the first electrical pathway or the second electrical pathway. a power source; an elongate shaft having a distal end; a heating element disposed at the distal end of the shaft, the heating element having a proximal end and a distal end; a first electrical pathway extending between the power source, the proximal end of the heating element, and the distal end of the heating element, and defining a first treatment length extending between the proximal and distal ends of the heating element; and a second electrical pathway extending between either: the power source, the distal end of the heating element, and an intermediate point along the heating element intermediate the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the distal end of the heating element, or the power source, the proximal end of the heating element, and an intermediate point along the heating element between the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the proximal end of the heating element, the power source, the distal end of the heating element, and an intermediate point along the heating element intermediate the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the distal end of the heating element, or the power source, the proximal end of the heating element, and an intermediate point along the heating element between the proximal and distal ends thereof, wherein the second electrical pathway defines a second treatment length extending between the intermediate point and the proximal end of the heating element, wherein the power source is configured to automatically distinguish between the fist and second treatment lengths (L1, L2, L3) and to adjust a level of power delivery based on whether the power source is delivering power to the first electrical pathway or the second electrical pathway.