Patent ID: 11957409
Assignee: BOSTON SCIENTIFIC SCIMED, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A microwave ablation probe comprising:
a probe body comprising a shielded portion and a radiation window that is at least partially transparent to microwave energy, wherein the shielded portion comprises a cannula;
a liner concentric with and within the cannula, wherein the liner is formed from an insulating material,
a coaxial cable within the probe body; and
an antenna comprising a radiating portion for emission of microwave energy at a distal portion of the probe body, wherein the radiating portion is aligned with the radiation window;
a probe tip disposed at a distal end of the probe body;
wherein the probe body defines an irrigation path configured to carry cooling fluid to and from the distal portion of the probe body, wherein a first segment of the irrigation path is defined between the outer surface of the outer conductor and an inner surface of liner, wherein a second segment of the irrigation path is defined between an outer surface of the liner and an inner surface of the cannula, wherein a distal end of the irrigation path terminates proximally to the probe tip;
wherein at least one wall defining the irrigation path comprises a heat exchange surface, wherein the heat exchange surface comprises one or more convective fins extending axially along the heat exchange surface and parallel to a longitudinal axis of the probe body; wherein the convective fins are defined along at least a portion of an inner surface of the cannula and at least a portion of an outer surface of an outer conductor of the coaxial cable; and
wherein the heat exchange surface has an average radius, wherein a surface area of the heat exchange surface is larger than a surface area of a smooth surface with a radius equal to the average radius.