Electrosurgical instrument
AssigneeCreo Medical Limited
InventorsChristopher Paul Hancock, Patrick Burn, Malcolm White
Life of this patent
Estimating the term…
Abstract
An electrosurgical instrument with a radiating tip portion having a relative permeability and/or relative permittivity that is selected to provide an electrical length for the radiating tip portion that enables effective delivery into biological tissue of microwave EM energy supplied thereto, at two or more frequencies of choice. The instrument has a radiating tip portion disposed to receive microwave EM energy from a coaxial cable, the radiating tip portion having a first effective relative permeability at a first frequency and a second effective relative permeability at a second frequency.
Claims9
An electrosurgical instrument for delivering microwave electromagnetic (EM) energy into biological tissue, the instrument comprising:
- a coaxial cable for conveying microwave EM energy at a first frequency and a second frequency, the second frequency being higher than the first frequency;
- and
- a radiating tip portion disposed at a distal end of the coaxial cable to receive microwave EM energy from the coaxial cable, the radiating tip portion having a first effective relative permeability at the first frequency and a second effective relative permeability at the second frequency,
- wherein the first effective relative permeability and the second effective relative permeability are selected to cause an electrical length of the radiating tip portion to support resonance at the first frequency and the second frequency respectively.
An electrosurgical instrument for delivering microwave electromagnetic (EM) energy into biological tissue, the instrument comprising:
- a coaxial cable for conveying microwave EM energy at a first frequency and a second frequency, the second frequency being higher than the first frequency;
- and
- a radiating tip portion disposed at a distal end of the coaxial cable to receive microwave EM energy from the coaxial cable, the radiating tip portion having a first effective relative permittivity at the first frequency and a second effective relative permittivity at the second frequency,
- wherein the first effective relative permittivity and the second effective relative permittivity are selected to cause an electrical length of the radiating tip portion to support resonance at the first frequency and the second frequency respectively.
Dependencies are inferred from the claim text.