Ceramic tip for gas-assisted electrosurgical probe
An apparatus for gas-assisted electrosurgery having a gas-assisted electrosurgical probe comprising a tube and an electrode within said tube, wherein a distal end portion of said electrode extends from an opening at a distal end of said tube and an electrically insulating tip connected to a distal end of said electrode. The electrically insulating tip has a substantially hemispherical distal end portion having a radius r 1 and a proximal portion having a circular cross-section and a central axis of a length l 1 , wherein l 1 >r 1 .
1. A probe for gas-assisted electrosurgery comprising:
a gas-assisted electrosurgical probe comprising a tube and an electrode within said tube, wherein a distal end portion of said electrode extends from an opening at a distal end of said tube;
an electrically insulating tip connected to the distal end of said electrode, said electrically insulating tip comprising:
a substantially hemispherical ceramic distal end portion having a radius r c ; and
a proximal ceramic portion having a circular cross-section, a concave outer surface and a central axis of a length L 1 ;
wherein L 1 >r c .
2. The probe for gas-assisted electrosurgery according to claim 1 , further comprising a fillet between said substantially distal end portion and said proximal portion.
3. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has an outer surface having a plurality of portions with at least two of said plurality of portions having different outer radii of curvature.
4. The probe for gas-assisted electrosurgery according to claim 3 , wherein said at least two radii of curvature decrease from a proximal end of said electrically insulating tip to said fillet.
5. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has an outer surface having a varying radius of curvature.
6. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has a proximal end having a circular cross-section with a radius r p and 1.2r p <L 1 .
7. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has a proximal end having a circular cross-section with a radius r p and a distal end with a radius r d , wherein r d >2r p .
8. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has a proximal end having a circular cross-section with a radius r p and a distal end with a radius r d , wherein
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9. The probe for gas-assisted electrosurgery according to claim 1 , wherein said proximal portion has a proximal end having a circular cross-section with a radius r p and a distal end with a radius r d , wherein
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