An occlusion catheter system comprising: a first catheter member having a first lumen extending longitudinally through the first catheter member and a first opening at a distal end of the first catheter member; a second catheter member having a second lumen extending longitudinally through the second catheter member and a second opening at a distal end of the second catheter member, the second catheter member is positioned over and in spaced apart relationship relative to a proximal section of the first catheter member forming an annular space between the second catheter member and the first catheter member, the proximal section of the first catheter member resides within the second lumen of the second catheter member and the first catheter member extends beyond the distal end of the second catheter member, a third catheter member having a third lumen extending longitudinally through the third catheter member and a third opening proximate a distal end of the third catheter member; the third catheter member is positioned over a distal section of the first catheter member, the third catheter member having a distal section that extends distally from a distal end of the first catheter member such that the first lumen and the third lumen are in fluid flow communication, whereby the second and third catheter members, are spaced apart from each other along a longitudinal axis of the first catheter member with the first catheter member extending there between; an expandable occlusion member coupled to the second catheter member near the distal end of the second catheter member and to the third catheter member near a proximal end of the third catheter member, the expandable occlusion member being positioned such that a space between the distal end of the second catheter member and the proximal end of the third catheter member is within the expandable occlusion member; and an atraumatic tip (150, 350, 450 or 550) has a proximal section co-axially coupled proximate to a distal end of the third catheter member, the atraumatic tip (150, 350, 450 or 550) projects distally from the third catheter member, and the atraumatic tip (150, 350, 450 or 550) further defines a generally circular configuration curving proximally and then toward a central longitudinal axis of the occlusion system, the atraumatic tip (150, 350, 450 or 550) further including an unconnected end of the distal end to permit the atraumatic tip (150, 350, 450 or 550) to assume a linear configuration, co-axial with the occlusion catheter system for delivery. a first catheter member having a first lumen extending longitudinally through the first catheter member and a first opening at a distal end of the first catheter member; a second catheter member having a second lumen extending longitudinally through the second catheter member and a second opening at a distal end of the second catheter member, the second catheter member is positioned over and in spaced apart relationship relative to a proximal section of the first catheter member forming an annular space between the second catheter member and the first catheter member, the proximal section of the first catheter member resides within the second lumen of the second catheter member and the first catheter member extends beyond the distal end of the second catheter member, a third catheter member having a third lumen extending longitudinally through the third catheter member and a third opening proximate a distal end of the third catheter member; the third catheter member is positioned over a distal section of the first catheter member, the third catheter member having a distal section that extends distally from a distal end of the first catheter member such that the first lumen and the third lumen are in fluid flow communication, whereby the second and third catheter members, are spaced apart from each other along a longitudinal axis of the first catheter member with the first catheter member extending there between; an expandable occlusion member coupled to the second catheter member near the distal end of the second catheter member and to the third catheter member near a proximal end of the third catheter member, the expandable occlusion member being positioned such that a space between the distal end of the second catheter member and the proximal end of the third catheter member is within the expandable occlusion member; and an atraumatic tip (150, 350, 450 or 550) has a proximal section co-axially coupled proximate to a distal end of the third catheter member, the atraumatic tip (150, 350, 450 or 550) projects distally from the third catheter member, and the atraumatic tip (150, 350, 450 or 550) further defines a generally circular configuration curving proximally and then toward a central longitudinal axis of the occlusion system, the atraumatic tip (150, 350, 450 or 550) further including an unconnected end of the distal end to permit the atraumatic tip (150, 350, 450 or 550) to assume a linear configuration, co-axial with the occlusion catheter system for delivery.