Which fixture is appropriate for clinical use involving bedpans?

The clinical sink is specifically designed for handling and disposing of materials related to medical procedures, including bedpans. These sinks typically feature deeper basins and may include additional features such as high backsplashes and foot-operated controls to promote sanitation and ease of use in clinical settings. Their design allows for the safe, hygienic disposal of waste, while also facilitating thorough cleaning and disinfection, which is critical in a healthcare environment.

The other options do not meet the requirements for clinical use. Common vents and cesspools are related to plumbing venting and waste containment, respectively, but are not suitable for direct use in clinical settings. A combination fixture may not be specialized enough to manage the unique hygiene needs associated with clinical activities. Hence, the clinical sink is the only appropriate choice for these specific applications.