US 12,239,575 B2
Method and apparatus for shearing tissue at a target surgical site
Shamira Perera, Singapore (SG); Michael Belkin, Givat Shmuel (IL); and Alvin Kok, Singapore (SG)
Assigned to SINGAPORE HEALTH SERVICES PTE LTD, Singapore (SG)
Appl. No. 16/970,942
Filed by SINGAPORE HEALTH SERVICES PTE LTD, Singapore (SG); and Michael Belkin, Givat Shmuel (IL)
PCT Filed Feb. 15, 2019, PCT No. PCT/SG2019/050089
§ 371(c)(1), (2) Date Aug. 18, 2020,
PCT Pub. No. WO2019/160508, PCT Pub. Date Aug. 22, 2019.
Claims priority of provisional application 62/631,960, filed on Feb. 19, 2018.
Prior Publication US 2020/0390600 A1, Dec. 17, 2020
Int. Cl. A61F 9/007 (2006.01); A61B 10/02 (2006.01); A61F 9/008 (2006.01)
CPC A61F 9/00763 (2013.01) [A61B 10/0266 (2013.01); A61B 10/0283 (2013.01); A61F 9/00821 (2013.01); A61B 2217/007 (2013.01); A61F 2009/00868 (2013.01); A61F 2009/00891 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A surgical tool for shearing tissue at a target surgical site, the surgical tool comprising:
a cannula assembly with a distal end and a proximal end, comprising an elongated tube within a flexible sheath along a longitudinal axis passing axially through a first lumen of the elongated tube;
wherein the distal end of the cannula assembly having a surgical blade and wherein the distal end of the cannula assembly further having an inwardly curved tip;
and
an axial ball joint in a body of the surgical tool, coupled to the elongated tube at the proximal end of the cannula assembly, that when rotated, causes the surgical blade to rotate about the longitudinal axis, so as to shear a portion of tissue at a target surgical site.