05762629 is referenced by 437 patents and cites 23 patents.

The present invention os a method and apparatus for performing percutaneous surgical disc procedures. The method includes percutaneously entering the back of a patient in a posterolateral position with an obturator and advancing the obturator through a percutaneously created fenestration of the annulus of the disc. A guide containing an oval shaped bore is placed over the obturator. An elongated member, having a cross-sectional shape such that when placed adjacent to the obturator forms an assembly having an oval cross-section, is inserted through the bore of guide and into the back of the patient and the fenestration of the annulus of the disc, The guide is removed and an oval cannula having a bore with an oval transverse cross-section and a proximal and distal end, is slid downwardly over the obturator and elongated member assembly. The distal end of the oval cannula is inserted into the disc. The obturator and the elongated member assembly are removed from the bore of the oval cannula and multiple surgical instruments are introduced into the oval cannula to perform the surgical procedure.

Title
Oval cannula assembly and method of use
Application Number
784693
Publication Number
5762629
Application Date
May 2, 1996
Publication Date
June 9, 1998
Inventor
Parviz Kambin
Devon
PA, US
Agent
Pravel Hewitt Kimball & Krieger
Assignee
Smith & Nephew
TN, US
IPC
A61M 5/178
View Original Source