Recently I underwent a tubal cannulation procedure to clear my blocked fallopian tube. This is what took place, In February I was diagnosed by HSG to have a blockage in one of my fallopian tubes.
The doctor explained the HSG is a somewhat limited test, because if one tube is slightly wider than the other, the fluid they inject under pressure will just go the path of least resistance, in other words up the bigger tube. They can't always tell if you're actually blocked, and sometimes need to perform a more specialized test which is the tubal cannulation, a more specialzed form of the HSG.
Again they inject a radiopaque dye, but this time the catheter is run only into the one fallopian tube and is sealed off by a balloon. The dye only enters that one tube, they can tell not only if the tube is actually blocked, they may be able to remove the blockage, depending on the type of blockage. I'm not exactly sure how they remove. As I was preparing to do this, a co-worker told me about some CHinese herbs she had taken to help her clear her blocked tubes, I figured anything helps, so I gave them a shot,, prior to taking them my FSH was 65 after 2 months on the herbs, the levels dropped to 37. Today my FSH is 25. I'm ecstatic and hopeful that soon I will conceive. The herbs are by Radiant Wonder, I was on Cinnamon & Poria, Balance and Super Fertility 2 formula.
Hope this helps and Good luck