Testing & Diagnosis for Stridor in Children

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How is stridor diagnosed?

Stridor is usually diagnosed solely on the medical history and physical examination of your child. It is important to remember that stridor is a symptom of some underlying problem or condition. If your child has stridor, your child's physician may order some of the following tests to help determine the cause of the stridor:

  • chest x-rays- a diagnostic test which uses invisible electromagnetic energy beams to produce images of internal tissues, bones and organs onto film
  • blood tests
  • pulse oximetry- an oximeter is a small machine that measures the amount of oxygen in the blood. To obtain this measurement, a small sensor (like a Band-Aid) is taped onto your child’s finger or toe. When the machine is on, a small red light can be seen in the sensor. The sensor is painless and the red light does not get hot.
  • sputum culture- a diagnostic test performed on the material that is coughed up from the lungs and into the mouth
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