Microwave tissue ablation probe with non-metallic introducer set

A microwave ablation system comprising:

• a microwave ablation probe having an elongated probe body and a radiating portion for emission of microwave energy at a distal portion of the probe body;
• and
• a cannula having:
• a cannula body comprising a first material that is not transparent to microwave energy;
• a lumen, and
• a window portion at a distal portion of the cannula body, the window portion comprising a material that is at least partially transparent to microwave energy;
• wherein the microwave ablation probe is configured to be fully housed in the cannula such that the window portion of the cannula body overlaps the radiating portion of the microwave ablation probe, and to radiate microwave energy through the window portion of the cannula body, wherein the window portion does not overlap with the first material.

A microwave ablation method comprising:

• inserting a microwave ablation probe into a lumen of a cannula;
• aligning a radiating portion of the microwave ablation probe with a window portion of the cannula constructed from a material that is at least partially transparent to microwave energy;
• causing microwave energy to be emitted from the radiating portion of the microwave ablation probe through the window portion of the cannula with the microwave ablation probe fully housed in the cannula and the window portion of the cannula body overlapping the radiating portion of the microwave ablation probe;
• and
• blocking microwave radiation from radiating through a portion of the cannula constructed from a second material that is not transparent to microwave energy, wherein the window portion does not overlap with the second material.