摘要:
An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest.
摘要:
A coupler for coupling a flexible coaxial cable (32), a fluid cooling system (40) and the outer sheath (35) of a catheter (30), the coupler comprising: a fluid coupler body (845a) including: a fluid inlet (842a) configured to operably couple to a source of cooling fluid and receive fluid therefrom; a fluid outlet (843a) configured to operably couple to a fluid discharge; and an outer sheath coupler (845b) forming an aperture for coupling with an outer sheath (35) of a catheter while forming a fluid-tight seal therewith; and
a fluid sealing system (819) housed in the fluid coupler body including: a distal sealing diaphragm (819a) configured to form a fluid-tight seal about an outer surface of an inflow lumen (842) and a fluid-tight seal with an interior surface of the fluid coupler body (845a) defining an outflow plenum (843b) in fluid communication with the fluid outlet (843a); and a proximal sealing diaphragm (819b) configured to form a fluid-tight seal about an outer surface of the coaxial cable (32) and a fluid-tight seal with an interior surface of the fluid coupler body(845a) thereby forming an inflow plenum (842b) in fluid communication with the fluid inlet (842a).
摘要:
A surgical snare comprising a means of delivering thermal plasma on to biological tissue encircled by the snare. The snare may be “cold” snare, i.e. formed from insulating material, or active, i.e. connected to receive RF and/or microwave energy to be radiated into the area encircled by the snare. The surgical snare may thus deliver into biological tissue encircled by a retractable loop any one of (i) a plasma to perform surface coagulation, (ii) a non-ionising microwave field (in the absence of plasma) to perform coagulation at a deeper level, and (iii) an RF field to assist with cutting.
摘要:
An energy-delivery device suitable for delivery of energy to tissue includes an antenna assembly, a chamber defined about the antenna assembly, and a cable having a proximal end suitable for connection to an electrosurgical energy source. The energy-delivery device also includes a flexible, fluid-cooled shaft coupled in fluid communication with the chamber. The flexible, fluid-cooled shaft is configured to contain a length of the cable therein and adapted to remove heat along the length of the cable during delivery of energy to the antenna assembly.
摘要:
A microwave antenna comprises a feedline (20) including a coaxial cable and a radiating section (18) coupled to the feedline. The radiating section includes a choke (19) .An inflow tube (55) is disposed around an outer conductor of the coaxial cable. The inflow tube defines an inlet flow path configured to supply a coolant fluid to the radiating section. A transition collar (53) forms a portion of the choke. The collar is of a dielectric material and has a proximal end and a distal end. The proximal end is coupled to a distal end of the inflow tube. The transition collar further includes at least one outflow aperture (53a) at the proximal end thereof configured to receive the fluid from the distal end of the inflow tube and transition the fluid from the at least one outflow slot to a distal end of the radiating section.
摘要:
An electrosurgical resection instrument (100) for applying to biological tissue radiofrequency electromagnetic energy has a protective hull (120) comprising a shaped piece of dielectric material mounted to cover an underside of an instrument tip (104) of the instrument (100). The protective hull (120) acts as a shield to protect tissue that may lie under the instrument tip (104) from damage during treatment. The instrument (100) may be particularly useful in procedures performed in a gastrointestinal tract, where bowel perforation is a concern, or in the pancreas, where damage to the portal vein or the pancreatic duct may occur when a tumour or other abnormality is being resected, dissected or removed.
摘要:
An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest.
摘要:
An endoluminal medical access device (1) is disclosed that is devised for endoluminal delivery to an extravascular target site (5) at a vasculature site of a human or animal body vasculature, such as the microvasculature. The device (1) comprises a hollow body (112) arranged around a continuous channel (113) that ends in a distal end (100) and comprises a distal penetration portion (102) that is devised to extend across a tissue wall of said microvasculature said microvasculature site (4) at an extravascular target site in said body to provide communication with said extravascular target site through said channel (113) and devised for at least partly apposition to said tissue wall, and said device comprising an intrusion depth limitation unit (116) for preventing introduction of said distal penetration portion (102) beyond a desired insertion depth through said vascular wall into the extravascular target site
摘要:
A coupler for coupling a flexible coaxial cable, a fluid cooling system and the outer sheath of a catheter, the coupler including a fluid coupler body having a fluid inlet, a fluid outlet, a bypass bulb, an outer sheath, and a fluid sealing system housed in the fluid coupler body. The fluid sealing system includes a distal sealing diaphragm and a proximal sealing diaphragm configured to form a fluid-tight seal with the fluid coupler body.
摘要:
A microwave delivery device, including a coaxial feedline having an inner conductor, an inner dielectric insulator coaxiaily disposed about, the inner conductor, and an outer conductor coaxially disposed about, the inner dielectric, and a radiating portion operably coupled to a distal end. The radiating portion includes a radiating portion inner conductor operable coupled to and extending from a distal end of the coaxial feedline inner conductor, a shielding outer conductor helically wrapped about the radiating portion inner conductor and operably coupled to the coaxial feedline outer conductor; and a shielding dielectric positioned between the radiating portion inner conductor and the shielding outer conductor wherein the width of the shielding outer conductor varies according to the longitudinal position thereof along the coaxial.feedline inner conductor, and a cap operably coupled to a distal end of the radiating portion inner conductor and the shielding outer conductor to provide an electrical connection therebetween.