When the fimbria of the fallopian tubes become
damaged, it may result in a tube that is blocked at the very distal end; the
part farthest away from the uterus. If the tube then becomes filled with fluid,
it is called a hydrosalpinx (“hydro”
refers to water; “salpinx” refers to the fallopian tube itself). Women who
have a hydrosalpinx should have their fallopian tubes either removed or cut
prior to undergoing IVF. The surgery usually involves a simple outpatient
procedure called laparoscopy. The tubes are cut or removed so that the tubal
fluid, which would be toxic to an embryo or adversely affect the receptivity of
the endometrial lining, does not flow backward into the uterine cavity,
preventing implantation of the embryo.
It is now well recognized that women with an
untreated hydrosalpinx have a substantially reduced chance for pregnancy with
IVF. In addition, an untreated hydrosalpinx may increase the chance that a
woman will experience a spontaneous abortion or miscarriage. For all these
reasons, treating a hydrosalpinx should both increase the IVF pregnancy rate
and decrease the chances for an early pregnancy loss. A patient with a single
normal fallopian tube and a hydrosalpinx will also have a higher chance of
achieving a spontaneous pregnancy after removal or ligation of the damaged
tube. A hydrosalpinx, if present, is usually identified during the infertility
diagnostic evaluation with a Hysterosalpingogram (HSG). This simple x-ray study
should be performed in all infertile women unless a diagnostic laparoscopy has
already been performed. Preoperatively, we advise all patients that we
recommend removal or ligation of her tube(s) if a hydrosalpinx is discovered at
laparoscopy.
Hydrosalpinx, Infertility and IVF
A hydrosalpinx is a blockage of the far end of a
woman’s fallopian tube which results in the accumulation of fluid within the
tube. The condition can affect one or both fallopian tubes. Often the affected
area can become substantially swollen and grow even as big as a few centimeters
in diameter.
Usually, there are few symptoms noticed by patients
although some women may suffer from abdominal or pelvic pain. The most common
mean by which a woman becomes aware that she has this problem is the
development of infertility. Women, who are not trying to get pregnant and have
no pain, may go undiagnosed.
Hydrosalpinx Impact on Fertility
As mentioned previously, the main presentation of a
hydrosalpinx is infertility. The fallopian tube plays a crucial role in
establishing a pregnancy. As sperm enter the vagina, they travel through the
opening of the uterus (cervix), through the uterus, and into the fallopian
tubes. If intercourse happens at the time of ovulation, then an egg may be
present in one of the fallopian tubes. A sperm can fertilize the egg forming an
embryo. Afterwards, the embryo migrates down the fallopian tube into the
uterus. If the embryo implants into the uterus, a pregnancy has been
established.
However, if this tube is blocked, the egg cannot be
captured by the fallopian tube and the egg and sperm are prevented from
meeting. Thus fertilization cannot occur and pregnancy is prevented. In
addition, when women have one tube which is open, their chances for pregnancy
are reduced if they have a hydrosalpinx on the other tube.
Probable Reasons for a lesser Success
There are various theories that try and explain why
the success rates in these patients are so much lower. One suggests that the
flow of fluid into the uterus could interfere with and hinder implantation of
an embryo. This fluid could contain lower levels of proteins, various amounts
of debris, and other toxic substances found in the body that are harmful to the
embryo itself or possibly the lining of the uterus. Another theory states that
the fluid is a mechanical flush for the uterus, sweeping away the embryo. It is
not known whether these effects would be worse if both fallopian tubes are
affected, although that is thought to be the case.
Hydrosalpinx also impacts the Success of IVF
In vitro fertilization bypasses fallopian tube blockage
by extracting the eggs directly from the ovary and fertilizing them in the
laboratory. The embryos are then placed directly into the uterus. Thus, the
fallopian tubes are completely bypassed. With the growing success of IVF and
other fertility treatments in the past years, many women suffering from a
hydrosalpinx are turning to these treatments to enhance their chances of
pregnancy. However, there is substantial evidence to suggest that the success
of in vitro fertilization is significantly lower for women with hydrosalpinx
compared to other causes of infertility.
·
The overall pregnancy rate was shown to decrease
in the women with the hydrosalpinx. The women with no blockage had a pregnancy
rate of high compared to the women with the hydrosalpinx.
·
The implantation rate, which looks at how many
transferred embryos were able to implant in the uterine wall, also decreased in
the women with a hydrosalpinx.
·
The delivery rate decreased drastically as well.
Almost twice as many women delivered without a hydrosalpinx higher than with a
hydrosalpinx.
·
The delivery rate was lower in part because less
women became pregnant but also because more of the women miscarried. Early loss
in pregnancy was seen more often in the women affected than not.
Generally, for a woman with hydrosalpinx trying
IVF, the chances for pregnancy are greatly reduced compared to the average
infertile woman. While the possibility for pregnancy still exists in these
patients, these women should be counseled that their chances for live birth are
significantly lower if they have a hydrosalpinx.
Treatment Options for Hydrosalpinx to
improve Fertility
Salpingectomy
The complete surgical removal of a fallopian tube
is called a salpingectomy. The procedure can be done laparoscopically or with a
standard surgery performed by making a horizontal incision in the abdomen just
above the pubic hair line. Both procedures are performed under general
anesthesia so that the patient is completely asleep.
Laparoscopy is a minimally invasive way of performing
surgery. An small fiber optic telescope is inserted in a small incision just
below the navel. This allows the reproductive surgeon to see into the abdomen
and pelvis. Two additional incisions of about one centimeter each are made
above the pubic hair line. Through these small incisions, instruments can be
placed that allow the reproductive surgeon to detach the tube from the uterus
and blood vessels and to remove it from the abdomen. Laparoscopy is the
preferred method for performing a salpingectomy since no overnight
hospitalization is required and the smaller incisions are associated with a
shorter recovery time.
Tubal
Ligation
Tubal ligation is when the fallopian tubes are
either severed or pinched shut, but not removed. It is often referred to as
getting one’s “tubes tied.” This can also be done laparoscopically,
abdominally, or even vaginally. The most common way to seal the tubes is by
using a cauterizing clamp which when applied to the outside of the tube, will
seal it shut. Other methods include placing strong, tight rings or rubber bands
around the tube that pinch them closed. Theoretically, by blocking the fluid
from entering the uterine cavity, this may restore a normal chance for
achieving pregnancy. The most common use of tubal ligation is as a permanent
form of birth control. It is generally not considered to be reversible.
Hydrosalpinges, is surgery to remove it
better than just ligating it?
·
Removing the hydros by cutting them off and
taking them out of the body
·
Ligating or clipping them prior to IVF
·
Opening the end of the tube and leaving them in
place (not usually recommended)
We know that on the average success is higher after
surgically "fixing the hydros" However, it is not clear whether
surgery to remove the tube vs. clipping or burning it close to the uterus and
leaving the hydro in place is any different.
·
There is some concern that removal of the tube
could have a negative impact on the blood supply to the ovary. This might
result in reduced ovarian response to the IVF medications.
·
A reduced response to stimulation means fewer
eggs to work with and a lower chance for pregnancy. The number of eggs
retrieved correlates with the chance for IVF success.
How much higher is IVF success after
hydro surgery?
The improvement in IVF success rates in studies is
substantial but not huge. Some studies suggest that a woman under 35 might have
a 35% success rate without surgery and a 50% success rate after having hydros
removed. IVF success rates are very clinic-dependent. Therefore, decision
making about treating hydros is not a clear-cut "black and white"
situation. It is a grey area - and fertility doctors don't all agree about how
to treat women with hydros.
·
Some doctors say you need to have surgery
because it improves the chance for success
·
Some prefer not do surgery, and go to IVF - and
if the first cycle fails, then think about whether to do surgery before the
next IVF attempt.
·
Some doctors’ say it should be whatever the
woman wants - have the surgery to fix the hydros, or don't have the surgery and
accept a lower chance for success.
·
At our clinic we discuss surgery as an option
and educate patients so that they can decide whether they want surgery first -
or to go straight to IVF.
What causes hydrosalpinx?
Hydrosalpinx is often caused by tubal infection
such as pelvic inflammatory disease (PID). The infection causes the tubes to
become inflamed. After healing is finished the tubes are often blocked with
residual fluid inside. Continued fluid buildup over time dilates the tube more
resulting in hydrosalpinges of various sizes.