What is sonohysterography?
Sonohysterography is a technique in which fluid is injected through the cervix into the uterus, and ultrasound is used to make images of the uterine cavity. The fluid shows more detail of the inside of the uterus than when ultrasound is used alone. The procedure can be done in a health care provider’s office, hospital, or clinic. It usually takes about 15 minutes.
Why is sonohysterography done?
Sonohysterography can find the underlying cause of many problems, including abnormal uterine bleeding, infertility, and repeated miscarriage. A sonohysterogram may be ordered when a woman has had a normal ultrasound exam but is still having symptoms. This procedure can detect the following conditions:
- Abnormal growths inside the uterus, such as fibroids or polyps
- Scarring inside the uterus
- Abnormal uterine shape
The procedure will be scheduled when you are not having your menstual period. If you are bleeding, the results may not be as clear. The test may be postponed until the bleeding stops. The procedure is not done if you are or could be pregnant, or if you have a pelvic infection or pelvic inflammatory disease. You may be given a urine test to rule out pregnancy.
What preparation is involved before the procedure?
Sonohysterography is done when your bladder is empty. You will be asked to undress from the waist down and lie on an exam table. Your health care provider may do a pelvic exam to check if you have any tenderness or pain. In some situations, you may be given antibiotics.
How is sonohysterography performed?
Sonohysterography has two parts. A transvaginal ultrasound exam is done first. Next, a fluid is injected through the cervix into the uterus, and an ultrasound exam is done again.
- In a transvaginal ultrasound exam, an ultrasound transducer—a slender, handheld device —is placed in the vagina. It sends out sound waves that are used to make images of the internal organs. These images are shown on a screen.
- After the first transvaginal ultrasound exam, the transducer is removed. A speculum is placed in the vagina. It holds the vagina open. The health care provider passes a swab through the speculum to clean the cervix.
- Next, a thin tube called a catheter is inserted through the vagina. It is placed in the opening of the cervix or in the uterine cavity. The speculum then is removed.
- The transducer is placed in the vagina again. A sterile fluid is slowly passed through the catheter. Cramping may occur as the fluid goes into the uterus. A transabdominal ultrasound exam also may be done while the fluid is passed into the uterus. In this type of ultrasound exam, a transducer is moved over the abdomen.
- When the cavity is filled with fluid, ultrasound images are made of the inside of the uterus and the uterine lining.
Most women are able to go home right away and return to their normal level of activity that day. Some of the following symptoms may occur after the procedure:
- Watery discharge
This procedure is safe, but there is a rare risk of pelvic infection. Call your health care provider if you have any of the following symptoms:
- Pain or fever in the day or two after you go home
- A change in the type or amount of discharge
- Hysterosalpingography—This X-ray procedure is used to view the inside of the uterus and fallopian tubes and can show whether the tubes are blocked. Radiation is used and a fluid that contains a dye. Some women may be allergic to the dye that is used.
- Hysteroscopy—A slender, light-transmitting device with a small camera attached—the hysteroscope —is inserted into the vagina and through the cervix to look inside the uterus. Unlike sonohysterography, this test usually requires general anesthesia or local anesthesia.
- Magnetic resonance imaging (MRI)—This imaging test is used to view the internal organs, but it does not show the inside of the uterus as clearly as sonohysterography.