Inflation and deflation of obstruction device

An assembly comprising:

• an obstruction device comprising a proximal obstruction balloon and a distal obstruction balloon mounted on a shaft, said balloons being inflatable via an inflation lumen;
• and
• a delivery system that comprises an insertion tool and an injection site assembly assembled with one of said balloons, said insertion tool comprising a connector which is connectable to said injection site assembly and which permits passing tools and injection fluid therethrough, wherein said insertion tool comprises a shaft that has a hollow lumen;
• and
• wherein said connector comprises a plurality of resilient fingers insertable into said injection site assembly and the assembly further comprises an inflation tube that passes through said hollow lumen and presses said fingers against inner surfaces of said injection site assembly;
• and
• wherein said injection site assembly comprises a proximal insertion port and a distal receiving member and wherein said proximal insertion port is narrower than said distal receiving member, and wherein said connector has an operative configuration wherein said resilient fingers are inserted into and through said proximal insertion port, and after passing through said proximal insertion port, said fingers expand outwards into a space of said distal receiving member.