Treatment device for treating a side branch of a vessel and method for positioning a stent in a side branch

A balloon catheter for treating a treatment site of a vessel of a mammal with the use of a first guide wire and a second guide wire, the balloon catheter comprising:

• a tubular shaft having a distal shaft region that is sized and shaped to fit within the vessel and a proximal shaft region that is used to move the distal shaft region in the vessel;
• an inflatable balloon that is secured to the shaft near the distal shaft region, the balloon being movable between a retracted position and an expanded position, the balloon including a distal balloon edge and a proximal balloon edge;
• a first passageway that extends along at least a portion of the shaft and that receives the first guide wire, the first passageway having a first passageway inlet that receives the first guide wire and a first passageway outlet, the first passageway inlet being positioned closer to the proximal balloon edge than the distal balloon edge;
• and
• a second passageway that extends along the shaft and that receives the second guide wire, the second passageway having a second passageway inlet that receives the second guide wire and a second passageway outlet, the second passageway inlet being positioned at the distal shaft region, and the second passageway outlet being positioned near the proximal region

A method for treating a treatment site of a vessel of a mammal, the vessel including a main branch, and a side branch, the treatment site being located in the side branch near an intersection of the side branch and the main branch, the method comprising the steps of:

• providing a first guide wire having a first distal end and a first proximal end;
• moving the first distal end of the first guide wire in the main branch until the first distal end is past the intersection of the side branch with the first distal end still in the main branch;
• providing a second guide wire having a second distal end and a second proximal end;
• moving the second distal end of the second guide wire in the main branch and into side branch until the second distal end is past the treatment site;
• providing a treatment device including (i) a tubular shaft having a distal shaft region that is sized and shaped to fit within the vessel and a proximal shaft region that is used to move the distal shaft region in the vessel;
• (ii) a first passageway that extends along at least a portion of the shaft and that receives the first guide wire, the first passageway having a first passageway inlet that receives the first guide wire and a first passageway outlet, the first passageway inlet being positioned between the distal shaft region and the proximal shaft region, and the first passageway outlet being positioned near the proximal region;
• and (iii) a second passageway that extends along the shaft and that receives the second guide wire, the second passageway having a second passageway inlet that receives the second guide wire and a second passageway outlet, the second passageway inlet being positioned at the distal shaft region, and the second passageway outlet being positioned near the proximal region;
• and
• moving the treatment device over the guide wires until a portion of the treatment device is positioned adjacent to the treatment site.