Tubal Blockage At The End
The most common type of tubal blockage is when scar tissue forms at the very end of the fallopian tubes. This causes the tubal fimbria (the area of the tube where they egg is received from the ovary) to close. This type of tubal scar tissue will prevent pregnancy from occurring.
The most common cause for blockage at the end of the tube is from a previous pelvic infection, but any insult to the tube (ectopic pregnancy, endometriosis, surgery) can cause this type of tubal blockage.
When the tubal blockage is severe the fallopian tube will swell with fluid and the swollen tube is often called a tubal hydrosalpinx.
A hydrosalpinx can be repaired with a microsurgical salpingostomy procedure. During this procedure the scar tissue is removed and the end of the tube is reopened. This surgical repair will allow pregnancy to occur.
Fallopian Tube Blockage At The End
Some women will undergo an uncommon type of tubal ligation where the fimbrial ends of the tubes are tied, cut, and the fimbrial tissue is removed.
This type of tubal ligation procedure is uncommon and is called a fimbriectomy tubal ligation.
Fimbriectomy can be repaired with a microsurgical salpingostomy and allow women the ability to become naturally pregnant.
When the tubes are blocked either from a hydrosalpinx or fimbriectomy this can be repaired with a microsurgical salpingostomy procedure.
The chance of pregnancy after microsurgical salpingostomy depends on the age of the patient and the health and length of the remaining tube.
The pregnancy rate at one year following microsurgical salpingostomy is approximately 30 to 40%.
Tubal Blockage At The Beginning Of The Tube
It is less common to have blockage at the beginning of the fallopian tube. The most common reason to have blockage at the beginning of the fallopian tube is from an Essure sterilization procedure. The next most common reason to have blockage at the beginning of the tube is from Salpingitis Isthmica Nodosa (SIN).
Salpingitis Isthmica Nodosa is a condition which is not very well understood but often occurs in the beginning of the fallopian tube as it travels through the muscle of the uterus.
This condition causes progressive tubal scarring that can cause patients to have multiple ectopic (tubal) pregnancies. Ultimately this condition can progress to complete tubal blockage.
This condition can often be reversed through a tubouterine implantation procedure. We commonly perform tubouterine implantations for reversal of Essure sterilization, but this type of tubal repair can also correct blockage in the beginning part of the tube from other causes.
The pregnancy rate one year following tubouterine implantation ranges from 25 to 50%.