Methods for targeting a body passage to effect fluid flow

A method of targeting a second passage to effect retroperfusion in the second passage, the method comprising:

• expanding an expandable device in the second passage, the expandable device comprising radiopaque material visible under fluoroscopy;
• advancing a needle into the second passage to form a fistula between a first passage and the second passage,
• wherein advancing the needle comprises:
• targeting the expandable device under fluoroscopy;
• and
• monitoring the needle to confirm advancement of the needle into the second passage;
• making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve;
• advancing a guidewire through the needle into the expandable device;
• and
• closing the expandable device to grip the guidewire.

A method of targeting a second passage to effect retroperfusion in the second passage, the method comprising:

• inserting an expandable device in the second passage;
• advancing a needle into the second passage to form a fistula between a first passage and the second passage, wherein advancing the needle comprises targeting the expandable device;
• monitoring the expandable device as the needle is advanced towards the expandable device to confirm advancement of the needle into the second passage;
• making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve;
• advancing a guidewire through the needle into the expandable device;
• and
• closing the expandable device to grip the guidewire.