Multi-lumen endoscopic accessory and system

An endoscopic system comprising:

• a multi-lumen catheter having a proximal and distal end, wherein the catheter comprises an inflatable balloon affixed to the distal end of the catheter in fluid communication with a first lumen, and a hollow needle housed within the multi-lumen catheter for independent movement relative to the inflatable balloon;
• a controller, comprising an inner cylinder and a plurality of outer cylinders adapted for independent movement relative to each other, that is attachable to the multi-lumen catheter and having a first outer cylinder configured to advance the catheter distally for placing the inflatable balloon at the desired site and a second outer cylinder configured to extend or retract the hollow needle;
• and
• a guidewire configured to travel within the hollow needle, wherein the hollow needle is extended or retracted based on manipulation of the second outer cylinder of the controller and the guidewire is extended and retracted independently of the hollow needle at a desired site within a patient.

A method of treating a patient with an accessory coupled to an endoscope, said method comprising:

• endoscopically introducing a multi-lumen catheter within a working channel of the endoscope, wherein the catheter comprises an integral inflatable balloon and housing a hollow needle within a lumen and wherein the accessory comprises a controller that is attachable to the multi-lumen catheter and having an inner cylinder and a plurality of outer cylinders adapted for independent movement relative to each other, wherein a first outer cylinder of the accessory is configured to advance the catheter distally for placing the inflatable balloon at the desired site and a second outer cylinder of the accessory is configured to extend or retract the hollow needle;
• puncturing an organ wall, by manipulating a first outer cylinder of the accessory to advance or retract the hollow needle via the catheter, to create access to a desired site within the organ;
• advancing a guidewire within a lumen of the hollow needle to the desired site;
• retracting, by manipulating the first outer cylinder of the accessory, the hollow needle from the desired site, while maintaining the guidewire at the desired site;
• advancing, by manipulating a second outer cylinder of the accessory, the balloon to the desired site along the guidewire;
• inflating the balloon;
• and
• removing the multi-lumen catheter.