1. Limitations of specialized equipment and technicians: Lung function tests require the use of specialized equipment, such as spirometers, and specially trained technicians to operate and interpret the results. These equipment and personnel are limited in number, thus resulting in longer appointment times.
2. High demand for testing: Lung function tests are a common test, especially for patients with respiratory diseases such as asthma and chronic obstructive pulmonary disease. Due to the high demand for the test, the appointment time will be relatively long.
3. Uneven distribution of medical resources: In some areas or medical institutions, the equipment and resources for pulmonary function tests are relatively limited and cannot meet the needs of all patients. This can also lead to longer appointment times.