CPC A61B 18/1492 (2013.01) [A61B 18/1206 (2013.01); A61B 18/1815 (2013.01); H01P 1/065 (2013.01); H01P 1/066 (2013.01); A61B 2017/0034 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00178 (2013.01); A61B 2018/00202 (2013.01); A61B 2018/00208 (2013.01); A61B 2018/00642 (2013.01); A61B 2018/00755 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00982 (2013.01); A61B 2018/00994 (2013.01); A61B 2018/1823 (2013.01); A61B 2018/1838 (2013.01); A61B 2018/1861 (2013.01); A61B 2090/035 (2016.02); H01P 5/085 (2013.01)] | 16 Claims |
1. An electrosurgical instrument for applying radiofrequency energy and/or microwave frequency energy to biological tissue, the instrument comprising:
a distal part comprising an instrument tip for applying radiofrequency energy and/or microwave frequency energy to biological tissue, wherein the instrument tip comprises a first conductive element and a second conductive element;
a coaxial feed cable comprising an inner conductor, a tubular outer conductor coaxial with the inner conductor, and a dielectric material separating the inner and outer conductors, the coaxial feed cable being for conveying radiofrequency energy and/or microwave frequency energy to the distal part;
wherein:
the inner conductor is electrically connected to the first conductive element and the outer conductor is electrically connected to the second conductive element through a rotatable connection between the distal part and the coaxial feed cable that allows rotation of the distal part relative to the coaxial feed cable about a central axis of the distal part;
the instrument comprises an actuator for rotating the distal part in a first rotational direction relative to the coaxial feed cable; and
the distal part comprises a second coaxial feed cable comprising a second solid inner conductor, a second tubular outer conductor coaxial with the second inner conductor, and a second dielectric material separating the second inner and outer conductors, the second coaxial feed cable being for conveying radiofrequency energy and/or microwave frequency energy to the instrument tip.
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