A thermal surgical instrument comprising: a body comprising a body housing, a first conduit disposed in the housing, and a fluid connection site disposed in fluid communication with the first conduit; a surgical tip comprising a tip housing, a thermal element extending from the tip housing, a heat resistant enclosing member adjacent to and supporting the thermal element, the heat resistant enclosing member being disc shaped, and a heat sink adjacent to and configured to dissipate heat from the heat resistant enclosing member, wherein the heat sink is a sheath connected to the outer surface of the disc shaped enclosing member and extending around a portion of the thermal element, and wherein the heat sink does not contact the thermal element; wherein the surgical tip is in communication with the body housing such that at least a portion of the surgical tip is in fluid communication with the first conduit; and wherein the first conduit, the body housing, and the tip housing form a coolant flow pathway for cooling the thermal surgical instrument; wherein the surgical tip further comprises an elongate tube having a distal end and a proximal end, wherein the distal end of the elongate tube is connected to the tip housing and wherein the thermal element is attached at the proximal end of the elongate tube, wherein the elongate tube further comprises an outer tube, wherein the outer tube is disposed around an inner tube such that there is a space between the outer tube and the inner tube, wherein the outer tube and inner tube form two concentric tubes (95, 96), and further comprising a spline disposed between the outer tube and the inner tube. a body comprising a body housing, a first conduit disposed in the housing, and a fluid connection site disposed in fluid communication with the first conduit; a surgical tip comprising a tip housing, a thermal element extending from the tip housing, a heat resistant enclosing member adjacent to and supporting the thermal element, the heat resistant enclosing member being disc shaped, and a heat sink adjacent to and configured to dissipate heat from the heat resistant enclosing member, wherein the heat sink is a sheath connected to the outer surface of the disc shaped enclosing member and extending around a portion of the thermal element, and wherein the heat sink does not contact the thermal element; wherein the surgical tip is in communication with the body housing such that at least a portion of the surgical tip is in fluid communication with the first conduit; and wherein the first conduit, the body housing, and the tip housing form a coolant flow pathway for cooling the thermal surgical instrument; wherein the surgical tip further comprises an elongate tube having a distal end and a proximal end, wherein the distal end of the elongate tube is connected to the tip housing and wherein the thermal element is attached at the proximal end of the elongate tube, wherein the elongate tube further comprises an outer tube, wherein the outer tube is disposed around an inner tube such that there is a space between the outer tube and the inner tube, wherein the outer tube and inner tube form two concentric tubes (95, 96), and further comprising a spline disposed between the outer tube and the inner tube.