Deflectable endoscope and method of use

An endoscope used for insertion into a patient's body, comprising:

• an elongated shaft having a central axis with an image sensor located at a distal end of the elongated shaft, the elongated shaft having an insertion profile comprising a straight cylindrical shape, the elongated shaft having an outer flexible sleeve and an inner slotted sleeve surrounded by the outer flexible sleeve, wherein the inner slotted sleeve is configured to deflect the elongated shaft to provide for at least one deflected profile for orienting the image sensor for peripheral viewing, the image sensor having a viewing angle;
• a working channel in the elongated shaft having a distal section, the working channel and distal section both adapted to accommodate an elongated straight tool extending therethrough when the elongated shaft is in the at least one deflected profile;
• and
• a pull-wire coupled to the inner slotted sleeve for moving the inner slotted sleeve between the insertion profile and the at least one deflected profile, wherein the at least one deflected profile comprises a first articulated profile and a second articulated profile, wherein in the second articulated profile the image sensor is radially offset from the central axis, wherein insertion of a rigid tool through the working channel causes movement from the first articulated profile to the second articulated profile, wherein in the second articulated profile the image sensor provides a 0 to 15 degree viewing angle.