US 12,440,257 B2
Tool for cryosurgery
Adriaantje Coliene Dam-Huisman, Delfgauw (NL)
Assigned to Crea IP B.V., Vierpolders (NL)
Appl. No. 17/057,124
Filed by Crea IP B.V., Vierpolders (NL)
PCT Filed May 22, 2019, PCT No. PCT/NL2019/050297
§ 371(c)(1), (2) Date Nov. 20, 2020,
PCT Pub. No. WO2019/226049, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 2020965 (NL), filed on May 22, 2018.
Prior Publication US 2021/0196338 A1, Jul. 1, 2021
Int. Cl. A61B 18/02 (2006.01); A61B 18/00 (2006.01); A61F 9/007 (2006.01)
CPC A61B 18/02 (2013.01) [A61F 9/007 (2013.01); A61B 2018/00041 (2013.01); A61B 2018/00095 (2013.01); A61B 2018/00101 (2013.01); A61B 2018/00922 (2013.01); A61B 2018/0212 (2013.01); A61B 2018/0231 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A tool for cryosurgery for handling tissue in ophthalmic surgical procedures, the tool comprising:
a tubular body;
a container for holding cryogenic fluid, the container being positioned within the tubular body;
a treatment tip comprising
a shaft of thermally insulating material having a first end and a second end, wherein the first end of the shaft of thermally insulating material is configured to rotatably and directly connect to a distal end of the tubular body so that the first end is inside the tubular body and extends outwards from the distal end of the tubular body so that the second end is outside the tubular body, and
a closed off end tip attached to the second end of the shaft of thermally insulating material, wherein the closed off end tip is sealingly coupled to the second end of the shaft of thermally insulating material;
a capillary for transporting cryogenic fluid from the container to the closed off end tip of the treatment tip, the shaft of thermally insulating material having an inner lumen with a diameter (dl) which is larger than an outer diameter (do) of the capillary, and
an activation mechanism for the container comprising a piercing element fixedly positioned in the tubular body and an activation handle configured to force the container onto the piercing element and coupled to a rotating cam element arranged in the tubular body, wherein the activation handle is configured to rotate from a starting position, in which the container is unopened, in a first rotation range into an activation position in a second rotation range and to rotate further from the activation position into a release position in a third rotation range, and the activation handle is adapted to disengage from the rotating cam element in the third rotation range.