common lumen 60 is disposed within distal balloon inflation lumen 62 referring again to fig1 balloon 65 is disposed about common lumen 60 the balloon is in communication with distal balloon inflation lumen 62 to provide for inflation of the balloon radiopaque band 68 is wrapped around the common lumen at a position within the balloon to allow for fluoroscopic imaging to assist in placing the balloon within the desired region of the blood vessel a prosthetic device 90 such as a stent is disposed about the balloon 65 and is in close radial proximity thereto where the prosthetic device is a wire mesh stent composed of metallic material the distal region of the catheter may be equipped with the stent by crimping the stent onto the distal region of the catheter body such as over the balloon the length of common lumen 60 will generally be between 5 and 30 centimeters with balloon 65 typically having a length in the range of 1 5 4 5 centimeters the balloon crossing profile the minimum width crossable by the balloon when deflated will typically be in the range of 0 020 0 045 inches the outside diameter of the balloon when inflated within a blood vessel will commonly be between 1 5 and 4 5 millimeters the foregoing ranges are set forth solely for the purpose of illustrating typical device dimensions the actual dimensions of a device constructed according to the principles of the present invention may obviously vary outside of the listed ranges without departing from those basic principles fig3 depicts transition region 20 between the three parallel lumens of proximal region 15 and the two concentric lumens of distal region 18 transition region 20 provides for communication between common lumen 60 of the distal region and both guidewire lumen.