How is hypersensitivity pneumonitis diagnosed?

Your doctor diagnoses HP by taking a detailed personal history and performing a physical examination.

During your examination, your doctor listens to your lungs with a special instrument called a stethoscope. If you have HP, your doctor may hear abnormal crackles, pops, or other lung sounds.

Your doctor also uses a device called a pulse oximeter to measure the oxygen level in your blood. This device is placed over the end of one of your fingers.

If necessary, your doctor uses other diagnostic tests to confirm your diagnosis. These tests may include chest X-rays, CT scans and lung function tests.

Additional tests like bronchoscopy can help diagnose HP. During this procedure, your doctor uses a small, flexible tube passed through your nose or mouth to view the interior of your lungs, and collect samples. In some cases, when a larger sample is required, doctors perform a surgical lung biopsy to surgically remove a sample of your lung tissue for further testing.

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