Endovaginal ultrasound

Definition

Transvaginal ultrasound is a method to look at a woman's reproductive organs, including the uterus, ovaries, cervix, and vagina. Transvaginal means across or through the vagina.

Transvaginal ultrasound is a type of pelvic ultrasound.

See also: Pregnancy ultrasound

Alternative Names

Endovaginal ultrasound; Ultrasound - transvaginal; Sonohysterography; Hysterosonography; Saline infusion sonography; SIS

Why the Endovaginal ultrasound is Performed

Transvaginal ultrasound can help diagnose the cause of certain types of infertility, pelvic pain, abnormal bleeding, and menstrual problems. It can show the lining of the uterus (endometrium). The test may reveal:

• Ovarian cysts
• Ovarian tumors
• Pelvic infection
• Uterine fibroids

Transvaginal ultrasound is also used during pregnancy to monitor the growth of the fetus, listen to the unborn baby's heart beat, and to check for ectopic pregnancy and other potential problems.

How the Endovaginal ultrasound is Performed

You will lie down on a table with your knees bent and feet in holders called stirrups. The health care provider will place a probe, called a transducer, into the vagina. The probe is covered with a condom and a gel. The probe sends out sound waves, which reflect off body structures. A computer receives these waves and uses them to create a picture. The doctor can immediately see the picture on a nearby TV monitor.

The health care provider will move the probe within the area to see the pelvic organs. This test can be used during pregnancy.

In some cases, a special transvaginal ultrasound method called saline infusion sonography (SIS), also called sonohysterography or hysterosonography, may be needed to more clearly view the uterus.

This test requires saline (sterile salt water) to be placed into the uterus before the ultrasound. The saline helps outline any abnormal masses, so the doctor can get a better idea of their size.

SIS is not done on pregnant women.

How to Prepare for the Endovaginal ultrasound

You will be asked to undress, usually from the waist down. A transvaginal ultrasound is done with your bladder empty.

How the Endovaginal ultrasound Will Feel

The test is usually painless, although some women may have mild discomfort from the pressure of the probe. Only a small part of the probe is placed into the vagina.

Risks

There are no known harmful effects of transvaginal ultrasound on humans.

Unlike traditional x-rays, there is no radiation exposure with this test.

Normal Results

The pelvic structures or fetus are normal.

What Abnormal Results Mean

An abnormal result may be due to many conditions. Some problems that may be seen include:

• Cancers of the uterus, ovaries, vagina, and other pelvic structures
• Non-cancerous growths of the uterus and ovaries (such as cysts or fibroids)
• Twisting of the ovaries
• Infection, including pelvic inflammatory disease
• Birth defects

Some problems that may be found specifically in pregnant women include:

• Ectopic pregnancy
• More than one fetus (twins, triplets, etc.)
• Miscarriage
• Placenta previa
• Placental abruption
• Tumors of pregnancy including gestational trophoblastic disease

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