What Is the Test for Blocked Fallopian Tubes

The fallopian tubes play a crucial role in the female reproductive system as they provide the pathway for the egg to travel from the ovary to the uterus and are the site where fertilization typically occurs. Blocked fallopian tubes can significantly impede the ability to conceive naturally. Understanding the tests available for detecting blocked fallopian tubes is essential for women who may be experiencing fertility issues or those who have had certain risk factors. In this article, we will explore the various diagnostic methods, their procedures, and what they can reveal about the condition of the fallopian tubes.

Signs and Symptoms That May Indicate the Need for Testing

Infertility

One of the most common reasons for suspecting blocked fallopian tubes is unexplained infertility. Couples who have been actively trying to conceive for a year or more without success may consider testing for blocked tubes. For example, a couple in their mid-30s who have had regular unprotected intercourse and still not achieved pregnancy might need to look into this possibility.

History of Pelvic Inflammatory Disease (PID)

Women with a previous history of PID, which is often caused by sexually transmitted infections like chlamydia or gonorrhea, are at a higher risk of developing blocked fallopian tubes. If a woman had a severe bout of PID in the past, it is advisable to have the fallopian tubes evaluated.

Ectopic Pregnancy

A previous ectopic pregnancy can also be an indication. Since an ectopic pregnancy occurs when the fertilized egg implants outside the uterus, usually in the fallopian tube, it could suggest that there was some abnormality or blockage in the tube that led to the misplacement of the embryo.

Hysterosalpingogram (HSG)

Procedure

This is a common radiographic test. A contrast dye is injected through the cervix into the uterus and then flows into the fallopian tubes. X-ray images are taken as the dye travels through the reproductive tract. For instance, the patient lies on an X-ray table, and a speculum is inserted into the vagina to access the cervix. A thin catheter is then threaded through the cervix, and the contrast dye is slowly injected.

What It Shows

The HSG can clearly show the outline of the uterus and the fallopian tubes. If there is a blockage, the dye will not be able to pass through the tube freely, and the point of blockage can be visualized. It can also detect other uterine abnormalities such as a septate uterus or fibroids that might affect fertility.

Laparoscopy

Procedure

Laparoscopy is a minimally invasive surgical procedure. A small incision is made near the navel, and a laparoscope, which is a thin, lighted tube with a camera attached, is inserted into the abdominal cavity. The doctor can then directly visualize the fallopian tubes, ovaries, and other pelvic organs. Sometimes, a second small incision may be made to insert additional instruments for manipulation or taking tissue samples.

What It Shows

It provides a detailed and direct view of the fallopian tubes. The doctor can see if there are any adhesions, scar tissue, or other physical obstructions that are blocking the tubes. It can also identify endometriosis, which is another condition that can cause tubal blockage. For example, if there are adhesions from a previous surgery or infection, they will be visible as bands of tissue sticking the tubes to other organs.

Sonohysterography

Procedure

Also known as a saline infusion sonogram. A thin catheter is inserted through the cervix into the uterus, and a sterile saline solution is slowly injected. An ultrasound transducer is then used to create images of the uterus and fallopian tubes. The saline helps to distend the uterine cavity, making it easier to visualize any abnormalities.

What It Shows

It can detect some types of blockages in the fallopian tubes, especially those closer to the uterus. It is also useful in identifying polyps, fibroids, or other growths within the uterus that could potentially affect the patency of the tubes. For example, if there is a small polyp near the opening of the fallopian tube, it can be seen as a protrusion on the ultrasound image.

Hysteroscopy

Procedure

A hysteroscope, which is a thin, lighted instrument, is inserted through the cervix into the uterus. This allows the doctor to directly examine the inside of the uterus and the openings of the fallopian tubes. It can be done in an outpatient setting under local or general anesthesia, depending on the patient’s preference and the complexity of the case.

What It Shows

It gives a clear view of the uterine cavity and the proximal part of the fallopian tubes. The doctor can identify any scarring, polyps, or other lesions that might be blocking the tubes at their origin. For instance, if there is scar tissue from a previous dilation and curettage (D&C) procedure, it can be detected and evaluated.

Chlamydia and Gonorrhea Testing

Importance

Since these sexually transmitted infections are major causes of PID and subsequent fallopian tube blockage, testing for chlamydia and gonorrhea is often recommended. This is especially important for women with a new or multiple sexual partners or those with a history of unprotected sex.

Testing Methods

Samples are usually taken from the cervix or urethra. For chlamydia, nucleic acid amplification tests (NAATs) are commonly used, which are highly sensitive and can detect the presence of the bacteria even in low amounts. Gonorrhea testing can also be done using NAATs or culture methods. If either of these infections is detected, prompt treatment can help prevent further damage to the fallopian tubes.

Conclusion