Telescoping medical instrumet

An instrument shaft comprising:

• an outer elongate shaft having a rigid proximal section, a rigid distal section, and a fixed bend between the rigid proximal and distal sections, the outer shaft further including a lumen;
• an inner elongate shaft having a rigid proximal section, a rigid distal section, and a flexible intermediate section between the rigid proximal and distal sections;
• wherein
• the inner elongate shaft is disposed within the lumen of the outer elongate shaft such that a portion of its rigid distal section is disposed within the rigid distal section of the outer elongate shaft, such that a portion of its rigid proximal section is disposed within the rigid proximal section of the outer elongate shaft, and such that the flexible intermediate section extends through the bend;
• the inner elongate shaft slidable within the lumen of the outer shaft between a first position in which a distal end of the outer shaft is separated from the distal end of the inner shaft by a first distance, and a second position in which a distal end of the outer shaft is separated from the distal end of the inner shaft by a second distance greater than the first distance.