Cable for conveying radiofrequency and/or microwave frequency energy to an electrosurgical instrument

A cable for conveying radiofrequency and/or microwave frequency energy to an electrosurgical instrument at a first end of the cable, the cable comprising:

• a hollow tube comprising inner and outer electrically conductive layers separated by dielectric material to form a transmission line, the hollow tube having a central channel extending along its length;
• a first terminal at the first end of the cable, the first terminal being arranged to form an electrical connection between the inner conductive layer and a first cooperating terminal of the electrosurgical instrument;
• and
• a second terminal at the first end of the cable, the second terminal being arranged to form an electrical connection between the outer conductive layer and a second cooperating terminal of the electrosurgical instrument;
• wherein the first terminal comprises a first area of electrically conductive material located on a circumferential surface of the cable;
• and
• wherein the first area of electrically conductive material is located on an outer side of the dielectric material and is electrically connected to the inner conductive layer by an electrical connection that passes through, or around, the dielectric material.

A cable for conveying radiofrequency and/or microwave frequency energy to an electrosurgical instrument at a first end of the cable, the cable comprising:

• a hollow tube comprising inner and outer electrically conductive layers separated by dielectric material to form a transmission line, the hollow tube having a central channel extending along its length;
• a first terminal at the first end of the cable, the first terminal being arranged to form an electrical connection between the inner conductive layer and a first cooperating terminal of the electrosurgical instrument;
• and
• a second terminal at the first end of the cable, the second terminal being arranged to form an electrical connection between the outer conductive layer and a second cooperating terminal of the electrosurgical instrument;
• wherein the second terminal comprises a second area of electrically conductive material located on a circumferential surface of the cable;
• and
• wherein the second area of electrically conductive material is located on an inner side of the dielectric material and is electrically connected to the outer conductive layer by an electrical connection that passes through, or around, the dielectric material.