System and method for low profile occlusion balloon catheter

An occlusion catheter system for occlusion or partial occlusion of a relatively large vessel having an internal surface, the occlusion catheter system comprising:

• an inflation catheter member having a stiffener member, a first inflation lumen, a proximal catheter end and a distal catheter end, the inflation catheter member defining a longitudinal axis, the inflation catheter member having an atraumatic tip on the distal catheter end;
• an occlusion balloon having an internal balloon space, an external balloon surface, a proximal balloon end and a distal balloon end, the proximal and distal balloon ends connected to the inflation catheter between the proximal catheter end and the distal catheter end, the occlusion balloon substantially centered along the longitudinal axis in an inflated configuration, the first inflation lumen being in fluid communication with the internal balloon space;
• a distal pressure sensor attached to the inflation catheter member between the distal balloon end and the atraumatic tip;
• and
• an inflatable spine having an internal spine space, an external spine surface, a proximal spine end and a distal spine end, the proximal and distal spine ends connected to the inflation catheter, a portion of the external balloon surface contacting the external spine surface when the occlusion balloon and the inflatable spine are in an inflated configuration, the proximal spine end connected to the inflation catheter near the proximal balloon end and the distal spine end connected to the inflation catheter near the distal balloon end, the occlusion balloon and the inflatable spine configured to define blood flow channels with the internal surface and the external balloon surface when the occlusion catheter system is at least partially positioned in the vessel and the occlusion balloon and the inflatable spine are in a partially inflated configuration, the inflatable spine has a substantially constant spine diameter between the proximal spine end and the distal spine end in partially and fully inflated configurations.