Certified Pulmonary Function Technologist (CPFT) Practice Exam

The flexible bronchus is the type commonly used for diagnostic procedures due to its versatility and ease of use. This instrument is designed to navigate through the branching structures of the respiratory system with minimal discomfort to the patient. Its smaller diameter allows for insertion through the nasal passage or mouth, and it can access the smaller bronchi, which is essential for obtaining samples and visualizing areas of the lungs that may be affected by disease.

Flexible bronchoscopy facilitates various procedures, including biopsies, brushing, and lavage, which are crucial for diagnosing conditions like infections, tumors, or inflammation. Additionally, the capability of flexible bronchoscopes to accommodate various attachments and advanced imaging technologies enhances their diagnostic utility.

In contrast, the rigid bronchus is generally used in different contexts, such as when larger instruments are needed or for procedures under general anesthesia. While it has its place, it is less commonly utilized for routine diagnostic procedures compared to the flexible bronch.

Double-lumen bronchoscopes, designed primarily for specific types of surgeries and ventilatory support, are not typically used for diagnostic evaluations. Balloon bronchoscopes are less common and often associated with particular therapeutic interventions rather than diagnostics.

Overall, the flexible bronchus stands out as the most practical choice for a wide range of diagnostic