Common Urology Tests

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Cuando un niño tiene problemas de vejiga o del tracto urinario, sus padres necesitan respuestas. Urology Services at Arkansas Children's offers comprehensive testing designed to provide families with as much information as possible. A Child Life Specialist can work with patients having radiology studies. Las siguientes son las pruebas y procedimientos más comunes:

Prueba de orina

Es posible que los pacientes con molestias urinarias deban entregarnos una muestra orina para analizar. El paciente deberá orinar en un recipiente durante la consulta médica. Please ensure that the patient has a full bladder when arriving at the clinic and ask for a specimen cup as needed if the child needs to urinate before his/her appointment.

Cistouretrograma miccional (VCUG, en inglés)

Voiding cystourethrogram is a bladder test that is done by placing a small tube in the bladder through the urethra. The bladder is filled with an X-ray dye while pictures are taken with a fluoroscopy. A radiologist determines if the solution is going back up into the kidneys. This test is commonly done in evaluating a variety of conditions involving the urinary tract.


An ultrasound is a non-invasive test that allows visualization of the bladder and kidneys. Sound waves are sent through the patient's body and the results give 2D images of the urinary tract and genitalia. Esta prueba toma unos 20 minutos.

Orina residual postmiccional (PVR, en inglés)

Se trata de un examen rápido de la vejiga inmediatamente después de que el paciente la vacía. This test is used to show if there is urine remaining in the bladder. Por lo general esta prueba se realiza en la sala de examen de la clínica.


This study uses a special toilet to determine the flow rate of your urine during voiding. A veces se realiza esta prueba para buscar la causa de las micciones incompletas, el flujo lento, el ardor al orinar, el dolor de vejiga u otros síntomas.

The child needs a full bladder at the beginning of the appointment. After completing the Uroflow, a scan of the bladder will be done to see if urine is left in the bladder.

Urodynamic Testing

These studies are used to assess how the bladder and urethra are performing their job of storing and releasing urine. Urodynamic tests help your doctor see how well your bladder and sphincter muscles work.

  • Cytometric test monitors how the pressure builds up in the bladder as it fills with urine; the amount of urine the bladder can hold; and at what point you feel the urge to urinate.
  • Electromyography is included in the cytometric testing if nerve or muscle damage is suspected. Sensors are placed on the skin to measure electrical current created when the pelvic floor muscles contract.
  • Video urodynamic test combine cystometry and cystography into a single test. Pictures and videos of the bladder during filling and emptying are taken. This test shows the size and shape of the bladder and provides useful information about the function of the bladder and urethra.

After urodynamic tests, there might be mild discomfort with urination for a few hours. You may also experience a small amount of blood in the urine due to the catheter. Drinking (16) ounces of water every hour for 2 hours may help with symptoms. Taking a warm bath or holding a warm, damp washcloth over the urethral opening may be recommended by your healthcare provider. If any symptoms of infection are noticed such as fever, chills, or pain, call your healthcare provider.

Tests results are available after the tests are completed and will be discussed with you when you see your provider.

Gammagrafía renal (DMSA)

This test is a nuclear medicine test used to determine kidney function. A special tracer (Dimercapto succinic acid) is injected through an IV and when it goes through the kidneys they light up and pictures are taken with a special camera. Los resultados de esta prueba muestran la zona de la infección o daño en el riñón. This test takes about one hour after the tracer is absorbed by the kidneys.


This is a nuclear medicine test similar to a DMSA scan, except it also allows us to determine if there is any blockage. El rastreador se coloca en la orina y se puede seguir a medida que pasa por la vejiga. En los pacientes que tienen algún bloqueo u obstrucción en el tracto urinario, la prueba muestra que el rastreador no drena. Esta prueba puede tomar hasta una hora y media.

Kidney, Ureters, and Bladder (KUB) X-Ray

This is a simple x-ray of the kidneys, ureters, and bladder. This test is usually done to find kidney stones or severe constipation.

Tomografía computarizada (CT)

A CT scan, also known as a CAT scan, is used to examine the kidneys.