Abstract: An electrode structure for a distal tip of an electrosurgical instrument that enables efficient delivery of radiofrequency (RF) energy in a forward (distal) direction and uniform delivery of microwave energy for ablation in a region surrounding the distal tip. The instrument comprises a tip body having a first electrode and a second electrode, where the second electrode is spaced from the first electrode exposed dielectric material. The first electrode is connected through the tip body to an inner conductor of a coaxial feed. The second electrode is electrically connected to the outer conductor of the coaxial feed by a field-shaping conductive structure formed in or on the tip body. The field-shaping conductive structure is configured to shape a radiation profile of microwave energy emitted from the tip body.

Abstract: An electrosurgical instrument for use in minimally invasive surgical techniques that provides a small scale localized microwave field capable of precisely ablating tissue, e.g. in the lungs, through suitable selection of geometry and material for a radiating distal tip thereof. The instrument may be used with a bronchoscope having a power delivery structure formed within the instrument cord thereof. A vision system may be incorporated into the energy delivery structure. The instrument includes a coaxial cable for conveying microwave energy to a radiating tip portion that comprises a dielectric tip and a distal conductive portion that extends longitudinally therein. The dielectric tip has a dielectric constant greater than a dielectric material within the coaxial cable. The distal end of the device is designed to facilitate efficient microwave energy delivery into lung tumour tissue to achieve a localized volume of ablation.

Abstract: An electrosurgical instrument for delivering both microwave and radiofrequency (RF) energy in which a pair of longitudinally spaced electrodes are combined with an intermediate tuning element to enable both effective bipolar RF ablation and/or coagulation and microwave ablation with a field shape that is constrained around the instrument tip. The instrument comprises a radiating tip disposed at a distal end of a coaxial cable. The tip has a distal electrode and a proximal electrode disposed on a surface of a dielectric body and physically separated by an intermediate portion of the dielectric body. A tuning element is mounted in the intermediate portion.

Abstract: An electrosurgical instrument for delivering microwave energy to biological tissue, in which a pair of conductive tuning elements are mounted in a radiating instrument tip to shape a microwave radiation profile of the instrument so that the radiation profile is constrained around the instrument tip. Such tuning elements may result in a radiation profile that is substantially spherical around the instrument tip, providing a well-defined ablation volume. The tuning elements act to improve the efficiency with which microwave energy can be delivered into target tissue.

Abstract: An electrosurgical instrument for use in minimally invasive surgical techniques that provides a small scale localized microwave field capable of precisely ablating tissue, e.g. in the lungs, through suitable selection of geometry and material for a radiating distal tip thereof. The instrument may be used with a bronchoscope having a power delivery structure formed within the instrument cord thereof. A vision system may be incorporated into the energy delivery structure. The instrument comprise a coaxial cable for conveying microwave energy to a radiating tip portion that comprises a dielectric tip and a distal conductive portion that extends longitudinally therein. The dielectric tip has a dielectric constant greater than a dielectric material within the coaxial cable. The distal end of the device is designed to facilitate efficient microwave energy delivery into lung tumour tissue to achieve a localized volume of ablation.

Abstract: An electrode structure for a distal tip of an electrosurgical instrument that enables efficient delivery of radiofrequency (RF) energy in a forward (distal) direction and uniform delivery of microwave energy for ablation in a region surrounding the distal tip. The instrument comprises a tip body having a first electrode and a second electrode, where the second electrode is spaced from the first electrode exposed dielectric material. The first electrode is connected through the tip body to an inner conductor of a coaxial feed. The second electrode is electrically connected to the outer conductor of the coaxial feed by a field-shaping conductive structure formed in or on the tip body. The field-shaping conductive structure is configured to shape a radiation profile of microwave energy emitted from the tip body.

Abstract: An energy delivery system for performing tissue ablation at the distal end of an Electromagnetic Navigation Bronchoscopy (ENB) instrument. The system is insertable through an instrument channel of a steerable instrument cord in an ENB instrument, and comprise a coaxial cable with a radiating tip portion. The tip portion comprises a first conductive element electrically connected to the coaxial cable's inner conductor and a second conductive element electrically isolated from the inner conductor. The conductive elements are arranged to act as: an active electrode and a return electrode for delivering the RF energy into tissue surrounding the radiating tip portion, and an antenna for radiating the microwave energy as a localized microwave field. The system may be arranged to delivery energy according to a predetermined profile comprising interleaving periods of RF and microwave energy or a combination thereof, or a dynamic profile based on detected tissue impedance.

Abstract: A two-part aortic annular support system for supporting an aortic annulus during aortic valve repair procedures for prevention of further annular dilation. The first part comprises a composite annular ring that is positionable from within an aortic valve into the left ventricular outflow tract at the level of annular plane. The composite ring comprises a semi-rigid section and a resiliently deformable section. The semi-rigid section is shorter in length than the deformable section. The deformable section is extendible into a commissure of the aortic valve. The second part is a resilient band that is positionable external to the aortic root. The resilient band is securable to the composite ring through the aortic annulus by suturing. The present disclosure also relates to a use of the aortic annular support system and a method of inserting and securing the aortic annular support system during a surgical intervention.

Abstract: An electrosurgical instrument for delivering microwave energy to biological tissue, in which a pair of conductive tuning elements are mounted in a radiating instrument tip to shape a microwave radiation profile of the instrument so that the radiation profile is constrained around the instrument tip. Such tuning elements may result in a radiation profile that is substantially spherical around the instrument tip, providing a well-defined ablation volume. The tuning elements act to improve the efficiency with which microwave energy can be delivered into target tissue.

Abstract: An electrode structure for a distal tip of an electrosurgical instrument that enables efficient delivery of radiofrequency (RF) energy in a forward (distal) direction and uniform delivery of microwave energy for ablation in a region surrounding the distal tip. The instrument comprises a tip body having a first electrode and a second electrode, where the second electrode is spaced from the first electrode exposed dielectric material. The first electrode is connected through the tip body to an inner conductor of a coaxial feed. The second electrode is electrically connected to the outer conductor of the coaxial feed by a field-shaping conductive structure formed in or on the tip body. The field-shaping conductive structure is configured to shape a radiation profile of microwave energy emitted from the tip body.

Abstract: An electrosurgical instrument for delivering both microwave and radiofrequency (RF) energy in which a pair of longitudinally spaced electrodes are combined with an intermediate tuning element to enable both effective bipolar RF ablation and/or coagulation and microwave ablation with a field shape that is constrained around the instrument tip. The instrument comprises a radiating tip disposed at a distal end of a coaxial cable. The tip has a distal electrode and a proximal electrode disposed on a surface of a dielectric body and physically separated by an intermediate portion of the dielectric body. A tuning element is mounted in the intermediate portion.

Abstract: An electrosurgical instrument having a radiating tip with enhanced flexibility. In a first aspect, this is achieved by shaping the dielectric material in the radiating tip to facilitate bending of the radiating tip. In a second aspect, this is achieved by forming a dielectric body and outer sheath of the radiating tip as separate parts, to enable movement and flexure between the parts. By improving the flexibility of the radiating tip, maneuverability of the electrosurgical instrument may be improved.

Abstract: An electrosurgical instrument for applying microwave energy to biological tissue, where the instrument is capable of freezing biological tissue in a region around a radiating tip portion and applying microwave energy to the frozen tissue. By freezing the region around the radiating tip portion, microwave energy radiated from the radiating tip portion can be transmitted through the frozen region with low losses and into tissue surrounding the frozen region. This enables the size of the treatment area to be increased without having to increase the amount of microwave energy delivered to the radiating tip portion. The instrument comprises a transmission line, a radiating tip, a fluid feed for conveying a tissue-freezing fluid, and a thermal transfer portion arranged to provide thermal communication between the tissue-freezing fluid and biological tissue in a treatment zone.

Abstract: An electrosurgical instrument for use in minimally invasive surgical techniques that provides a small scale localized microwave field capable of precisely ablating tissue, e.g. in the lungs, through suitable selection of geometry and material for a radiating distal tip thereof. The instrument may be used with a bronchoscope having a power delivery structure formed within the instrument cord thereof. A vision system may be incorporated into the energy delivery structure. The instrument comprise a coaxial cable for conveying microwave energy to a radiating tip portion that comprises a dielectric tip and a distal conductive portion that extends longitudinally therein. The dielectric tip has a dielectric constant greater than a dielectric material within the coaxial cable. The distal end of the device is designed to facilitate efficient microwave energy delivery into lung tumour tissue to achieve a localized volume of ablation.

Abstract: An energy delivery system for performing tissue ablation at the distal end of an Electromagnetic Navigation Bronchoscopy (ENB) instrument. The system is insertable through an instrument channel of a steerable instrument cord in an ENB instrument, and comprise a coaxial cable with a radiating tip portion. The tip portion comprises a first conductive element electrically connected to the coaxial cable's inner conductor and a second conductive element electrically isolated from the inner conductor. The conductive elements are arranged to act as: an active electrode and a return electrode for delivering the RF energy into tissue surrounding the radiating tip portion, and an antenna for radiating the microwave energy as a localized microwave field. The system may be arranged to delivery energy according to a predetermined profile comprising interleaving periods of RF and microwave energy or a combination thereof, or a dynamic profile based on detected tissue impedance.

Abstract: A two-part aortic annular support system for supporting an aortic annulus during aortic valve repair procedures for prevention of further annular dilation. The first part comprises a composite annular ring that is positionable from within an aortic valve into the left ventricular outflow tract at the level of annular plane. The composite ring comprises a semi-rigid section and a resiliently deformable section. The semi-rigid section is shorter in length than the deformable section. The deformable section is extendible into a commissure of the aortic valve. The second part is a resilient band that is positionable external to the aortic root. The resilient band is securable to the composite ring through the aortic annulus by suturing. The present disclosure also relates to a use of the aortic annular support system and a method of inserting and securing the aortic annular support system during a surgical intervention.

Abstract: A food product including a liquid edible vegetable oil containing composition and dispensing article is provided. The article includes a reservoir for receiving a liquid composition and an operating unit for dispensing the vegetable oil containing composition as a spray. The operating unit is in fluid communication with and positioned above the reservoir fitting by way of a suitable seal over an open end of the reservoir. The unit includes a button positioned concentrically above a shroud, and a mechanical liquid pump mechanism. The pump includes a body having an upper end and a lower end, having inner walls. The upper end is surrounded by a collar. A piston, movable within the body, is seated within collar and is movable therein. The piston is provided at its bottom end with a piston base and a gasket positioned between them. The piston base is positioned at its lower end adjacent a spring system. The spring system functions to return the piston of the liquid pump to an un-activated position.