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¿Qué es el ultrasonido transvaginal o endovaginal y en que casos se recomienda?
En este caso, una sonda o transductor adecuado, se introduce en la vagina para obtener imágenes más claras y confiables, ya que por vía abdominal en muchas ocasiones interfieren gases intestinales, material fecal, contextura del paciente o por la imposibilidad de retener la orina, principalmente en pacientes ancianos.
El médico puede solicitar este tipo de ultrasonido por indicaciones tanto ginecológicas o del embarazo. También lo puede sugerir el radiólogo, dependiendo de los hallazgos obtenidos con el ultrasonido abdominal.
Definition: Transvaginal ultrasound is a type of pelvic ultrasound. It is used to look at a woman's reproductive organs, including the uterus, ovaries, cervix, and vagina. Transvaginal means across or through the vagina.
How the Test 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 Test: You will be asked to undress, usually from the waist down. A transvaginal ultrasound is done with your bladder empty.
How the Test 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.
Why the Test 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:
Uterine lining polyps
Thickened uterine lining in cases of postmenopausal bleeding
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.