Are pop-off valves on BVMs adjustable?

• A. Yes, always adjustable
• B. No, never adjustable
• C. Some devices are adjustable, others are fixed
• D. Only by a surgeon

Answer: (A)

The key idea is that BVM pop-off valves vary by model: they are designed to prevent over-pressurization, but whether you can change the release pressure depends on the device. Some BVMs have an adjustable pop-off, allowing you to set a higher or lower threshold (or even disable it in specific clinical situations). Others come with a fixed, non-adjustable valve that always releases at the same pressure. Because of this variation, the most accurate statement is that some devices are adjustable and others are fixed. The option claiming they are always adjustable isn’t correct because it doesn’t reflect the diversity of BVM designs.