Common tests done by a thoracic surgeon may include:

1. Imaging tests: These can include X-rays, CT scans, MRI scans, and PET scans. These tests help to assess the condition of the chest organs, including the lungs, heart, and blood vessels.

2. Pulmonary function tests: These tests measure how well the lungs are functioning and include spirometry, which assesses lung volume and airflow, and a diffusion capacity test, which evaluates the ability of the lungs to transfer oxygen from inhaled air into the bloodstream.

3. Biopsy: This involves collecting a small tissue sample from a suspicious area in the chest to be examined under a microscope. Biopsies can be performed through various methods, including needle biopsy, bronchoscopy, or mediastinoscopy.

4. Bronchoscopy: This procedure allows the thoracic surgeon to visualize the airways using a thin flexible tube with a light and camera on the end. It helps to detect any abnormalities, obtain tissue samples, or remove foreign objects.

5. Cardiac tests: If there is a suspected heart condition, the thoracic surgeon may order tests such as electrocardiogram (ECG or EKG), echocardiogram (ultrasound of the heart), stress testing, or cardiac catheterization.

6. Blood tests: A thoracic surgeon may order blood tests to check for specific markers or assess overall organ function. These tests can provide information about infection, inflammation, clotting factors, or other abnormalities.

It is important to note that the tests performed by a thoracic surgeon may vary depending on the specific condition being evaluated or treated.