Endoscope working channel with multiple functionality

Abstract

Endoscopic instrument assemblies and methods for making and using the same. An example endoscopic instrument assembly includes an endoscope having a working channel and an endoscopic instrument slidably disposed in the working channel. The inside surface of the working channel and the outside surface of the endoscopic instrument each have a non-circular cross-sectional shape along at least a portion of their respective lengths.

1 - 24 . (canceled) 
     
     
         25 . An endoscopic instrument, comprising:
 an endoscope having a longitudinal axis, wherein the endoscope includes:
 a first portion defining a first lumen having a first cross-sectional shape; and 
 a second portion defining a second lumen having a second cross-sectional shape different from the first cross-sectional shape, wherein the second portion is rotatable about the longitudinal axis relative to the first portion; and 
   a control member configured to rotate the second portion about the longitudinal axis relative to the first portion.   
     
     
         26 . The endoscopic instrument of  claim 25 , wherein the control member extends proximally. 
     
     
         27 . The endoscopic instrument of  claim 25 , wherein the second lumen is within the first lumen. 
     
     
         28 . The endoscopic instrument of  claim 25 , wherein the control member is configured to apply torque to a distal end of a tool disposed in the second lumen. 
     
     
         29 . The endoscopic instrument of  claim 25 , wherein the control member includes one or more wires disposed around the second portion. 
     
     
         30 . The endoscopic instrument of  claim 25 , wherein the control member includes a gear engaged with the second portion. 
     
     
         31 . The endoscopic instrument of  claim 25 , wherein the first cross-sectional shape is substantially circular. 
     
     
         32 . The endoscopic instrument of  claim 31 , wherein the second cross-sectional shape is substantially non-circular. 
     
     
         33 . The endoscopic instrument of  claim 32 , wherein the second cross-sectional shape is a polygonal cross-sectional shape. 
     
     
         34 . The endoscopic instrument of  claim 25 , further comprising a third portion having a third cross-sectional shape different from the second cross-sectional shape. 
     
     
         35 . An endoscopic instrument, comprising:
 an endoscope including a lumen having a longitudinal axis, wherein the endoscope includes:
 a first portion having a first inner perimeter; 
 a second portion having a second inner perimeter different from the first inner perimeter; and 
 a third portion having a third inner perimeter different from the second inner perimeter, wherein the second portion is disposed between the first portion and the third portion and is rotatable about the longitudinal axis relative to the first portion and the third portion; and 
 a control member configured to rotate the second portion about the longitudinal axis relative to the first portion and the third portion. 
   
     
     
         36 . The endoscopic instrument of  claim 35 , wherein the control member extends proximally from the second portion. 
     
     
         37 . The endoscopic instrument of  claim 35 , wherein the first cross-sectional shape and third cross-sectional shape are substantially circular and the second cross-sectional shape is substantially non-circular. 
     
     
         38 . The endoscopic instrument of  claim 35 , further comprising a tool disposed in the lumen, wherein the control member is configured to apply torque to the tool. 
     
     
         39 . The endoscopic instrument of  claim 35 , wherein the control member includes one or more wires disposed around the second portion. 
     
     
         40 . The endoscopic instrument of  claim 35 , wherein the control member includes a gear engaged with the second portion. 
     
     
         41 . A method of using an endoscopic instrument, comprising:
 delivering an endoscope into a patient, the endoscope defining a lumen having a longitudinal axis, wherein the endoscope includes a first portion and a second portion, wherein the second portion is within the first portion and is rotatable about the longitudinal axis relative to the first portion;   positioning a tool at least partially within the second portion;   rotating the second portion by a control member extending outside the patient.   
     
     
         42 . The method of  claim 41 , wherein the first portion has a first cross-sectional shape; and the second portion has a second cross-sectional shape different from the first cross-sectional shape. 
     
     
         43 . The method of  claim 41 , wherein the control member includes one or more wires disposed around the second portion. 
     
     
         44 . The method of  claim 41 , wherein the second portion includes a plurality of teeth, the control member is a rod, and a distal end of the rod includes a gear engaged with the plurality of teeth.