Final answer:
The chest tube flutter valve allows patient mobility and opens when the chest pressure is greater than atmospheric pressure to evacuate air from the pleural space, aiding in reestablishing negative pressure needed for lung inflation.
Step-by-step explanation:
The nurse recalling information about a chest tube flutter valve understands that this device is utilized for managing lung collapse, also known as pneumothorax, or other situations where air and fluid need to be removed from the pleural space. When discussing how the device functions, it's essential to note that one of the key characteristics of the flutter valve is that it allows patient mobility due to its small size and the fact that it does not need to be connected to a stationary external collection system. On the other hand, the device opens when the chest pressure is greater than atmospheric pressure, not less, allowing air to escape from the pleural space and helping to reestablish negative pressure within the chest. This helps inflate the lungs as required for proper respiratory function.