Abrasive cutting surgical instrument

Abstract

Surgical tools for removal of tissue, namely instruments, devices and methods for surgical tissue cutting with a cylindrical cutting burr bit extending from an elongated hollow member and connected to a shaft for actuating rotation motion of said burr bit to cut/remove tissue from a target location, while mitigating the harm of damaging surrounding tissue.

1 . A method for removing excess bone tissue of a subject in need thereof, the method comprising:
 creating an incision through the subject's skin when the subject is in an anterior position;   introducing, through the incision, a surgical device comprising an elongated hollow member, a non-hollow rotary shaft, a burr bit, and a burr shield extending from a distal open end of the hollow member to partially cover the burr bit, wherein the shaft comprises a driving end configured to be connected to a rotary motion actuator, and a target end mechanically connected to the burr bit,   positioning the burr bit against target bone tissue,   operating the device to cut the tissue.   
     
     
         2 . The method of  claim 1 , wherein the introducing comprises inserting a distal end of the elongated hollow member in between two adjacent vertebrae. 
     
     
         3 . The method of  claim 2 , wherein the positioning comprises placing the distal end at the of the elongated hollow member underneath the vertebrae. 
     
     
         4 . The method of  claim 3 , wherein operating the device comprises lateral cutting of bone tissue. 
     
     
         5 . The method of  claim 1 , wherein operating the device abrasive grinding/cutting of bone tissue by contacting the burr bit with the bone tissue at areas of the burr bit not covered by the shield. 
     
     
         6 . The method of  claim 1 , wherein the burr bit is configured for forward and lateral cutting of bone tissue. 
     
     
         7 . The method of  claim 1 , wherein the burr bit protrudes distally from the distal end of the hollow member. 
     
     
         8 . The method of  claim 1 , wherein the burr bit comprises circumferential cutting/abrasive characteristics, and a close-ended distal end. 
     
     
         9 . The method of  claim 1 , further comprising separating between bone tissue intended for cutting and surrounding soft tissue utilizing the shield. 
     
     
         10 . The method of  claim 9 , wherein the soft tissue is a ligament. 
     
     
         11 . The method of  claim 1 , wherein the shaft comprises bendable coiled and/or stranded wires. 
     
     
         12 . The method of  claim 1 , wherein the hollow elongated member comprises a distal bend. 
     
     
         13 . The method of  claim 12 , wherein a distance between the distal bend and the burr bit is less than 10 mm. 
     
     
         14 . The method of  claim 12 , wherein a bending angle of the distal bend is up to 90 degrees. 
     
     
         15 . The method of  claim 1 , wherein a distal end of the burr bit comprises a cutting edge. 
     
     
         16 . The method of  claim 1 , whereon the excess bone removal comprises removal of osteophytes in spinal stenosis, removal of osteophytes in cervical spinal stenosis, or spinal decompression. 
     
     
         17 . The method of  claim 1 , wherein the method does not require removal of vertebrae. 
     
     
         18 . The method of  claim 1 , wherein the shield is circular or semi-circular or dome shaped.