| CPC A61B 1/005 (2013.01) [A61B 1/0008 (2013.01); A61B 1/00082 (2013.01); A61B 1/00085 (2013.01); A61B 1/00089 (2013.01); A61B 1/00096 (2013.01); A61B 1/015 (2013.01); A61B 1/018 (2013.01); A61B 1/04 (2013.01); A61B 1/3137 (2013.01); A61B 5/02007 (2013.01); A61B 5/6882 (2013.01); A61B 5/0031 (2013.01); A61B 8/12 (2013.01); A61B 2018/0212 (2013.01)] | 9 Claims |

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7. A method comprising:
translating a second steerable catheter with respect to a first steerable catheter, the second steerable catheter supporting an imager attached to a distal region of the second steerable catheter and comprising a lumen for delivering an elongate instrument out the distal region of the second steerable catheter, the first steerable catheter comprising a plurality of pull wires configured to control articulation of the first steerable catheter and a lumen receiving the second steerable catheter, the lumen of the first steerable catheter opening through a distal face at a distal end of the first steerable catheter;
inserting the elongate instrument through the lumen of the second steerable catheter; and
imaging a tissue region with the imager while the elongate instrument projects distally from the lumen of the second steerable catheter.
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