Port fixation with interlocking structure

Abstract

The present disclosure relates to a surgical access system that includes a cannula assembly adapted for removable positioning within a percutaneous tissue tract, and an obturator assembly removably positionable within the cannula assembly. The cannula assembly includes a cannula housing, a cannula sleeve, and first engagement structure, and the obturator assembly includes an obturator housing, an obturator sleeve, and second engagement structure. The first engagement structure and the second engagement structure are correspondingly dimensioned such that rotation of the obturator assembly in a first direction effectuates corresponding rotation of the cannula assembly to facilitate advancement of the cannula assembly through tissue.

1 : A surgical access system comprising:
 a cannula assembly including an opening extending therethrough, and being adapted for removable positioning within a percutaneous tissue tract; and   an obturator assembly removably positionable within the opening extending through the cannula assembly, at least a portion of the obturator assembly including a configuration corresponding to that of the opening such that relative rotation between the obturator assembly and the cannula assembly is substantially inhibited, whereby rotation of the obturator assembly effectuates corresponding rotation of the cannula assembly to facilitate advancement of the cannula assembly through tissue.   
     
     
         2 : The surgical access system of  claim 1 , wherein the opening is non-circular in configuration, and at least a portion of the obturator assembly positionable within the opening has a non-circular configuration. 
     
     
         3 : The surgical access system of  claim 2 , wherein the opening is polygonal in configuration, and at least a portion of the obturator assembly positionable within the opening has a polygonal configuration. 
     
     
         4 : The surgical access system of  claim 1 , wherein the cannula assembly includes a cannula housing, and a cannula sleeve extending distally from the cannula housing. 
     
     
         5 : The surgical access system of  claim 4 , wherein the cannula sleeve includes a threaded portion configured and dimensioned to engage the tissue as the cannula assembly is rotated to thereby facilitate advancement of the cannula assembly through the tissue. 
     
     
         6 : The surgical access system of  claim 1 , wherein the obturator assembly includes an obturator housing, and an obturator sleeve extending distally from the obturator housing. 
     
     
         7 : The surgical access system of  claim 6 , wherein the obturator housing includes a handle configured and dimensioned for manual engagement to facilitate rotation of the obturator assembly. 
     
     
         8 : The surgical access system of  claim 6 , wherein the obturator sleeve includes a distal end configured and dimensioned to penetrate tissue. 
     
     
         9 : The surgical access system of  claim 8 , wherein the distal end of the obturator sleeve has a blunt configuration. 
     
     
         10 : A surgical access system comprising:
 a cannula assembly comprising:
 a cannula housing including an opening extending therethrough having a non-circular cross-sectional configuration; and 
 a cannula sleeve extending distally from the cannula housing; and 
   an obturator assembly engagable with the cannula assembly, the obturator assembly including:
 an obturator sleeve configured and dimensioned for insertion into the opening extending through the cannula housing, at least a portion of the obturator sleeve having a non-circular cross-sectional configuration corresponding to that of the opening extending through the cannula housing such that relative rotation between the obturator assembly and the cannula assembly is substantially inhibited, whereby rotation of the obturator assembly effectuates corresponding rotation of the cannula assembly to facilitate advancement of the cannula assembly through tissue. 
   
     
     
         11 : The surgical access system of  claim 10 , wherein the opening extending through the cannula housing is polygonal in configuration, and at least a portion of the obturator sleeve has a polygonal configuration. 
     
     
         12 : The surgical access system of  claim 11 , wherein the opening extending through the cannula housing is substantially square in configuration, and at least a portion of the obturator sleeve has a substantially square configuration. 
     
     
         13 : The surgical access system of  claim 10 , wherein the cannula sleeve includes a threaded portion configured and dimensioned to engage the tissue as the cannula assembly is rotated to thereby facilitate advancement of the cannula assembly through the tissue. 
     
     
         14 : The surgical access system of  claim 10 , wherein the obturator assembly further includes an obturator housing secured to a proximal end of the obturator sleeve. 
     
     
         15 : The surgical access system of  claim 14 , wherein the obturator housing includes a handle configured and dimensioned for manual engagement to facilitate rotation of the obturator assembly. 
     
     
         16 : The surgical access system of  claim 10 , wherein the obturator sleeve includes a distal end configured and dimensioned to penetrate tissue. 
     
     
         17 : The surgical access system of  claim 16 , wherein the distal end of the obturator sleeve has a blunt configuration. 
     
     
         18 : A method of establishing percutaneous access to a surgical worksite comprising the steps of:
 positioning a cannula assembly within a tissue tract;   positioning an obturator assembly within an opening in the cannula assembly to cause engagement between an external surface of the obturator assembly and an internal surface of the opening in the cannula assembly such that relative rotation between the obturator assembly and the cannula assembly is substantially inhibited;   rotating the obturator assembly to effectuate corresponding rotation of the cannula assembly, and facilitate advancement of the cannula assembly through tissue; and   advancing the obturator assembly and the cannula assembly distally through the tissue tract.   
     
     
         19 : The method of  claim 18  further including the step of withdrawing the obturator assembly from the cannula assembly, whereby the cannula assembly remains positioned within the tissue tract. 
     
     
         20 : The method of  claim 19  further including the step of inserting a surgical instrument into the surgical worksite through the cannula assembly.