Which of the following is a specimen container used in a flexible or rigid bronchoscopy?

The Lukens container is specifically designed for collecting and preserving specimens obtained during procedures like flexible or rigid bronchoscopy. It features a wide opening that facilitates the collection of tissue samples or aspirated secretions from the bronchial passages. The design of the Lukens container ensures that specimens can be easily retrieved and handled while minimizing contamination and preserving their integrity for further analysis.

The other options, while useful in various medical contexts, do not serve this particular purpose. For example, an Ellik is typically used for retrieving and collecting bladder specimens, while chest bottles are designed for draining pleural effusions or air from the pleural cavity. A suction canister, on the other hand, is mainly employed to collect fluids or debris from surgical sites or airways during procedures but is not specifically reserved for specimen collection for diagnostic purposes like the Lukens container. This makes the Lukens container the most appropriate choice for specimen collection during bronchoscopy.