Final answer:
The principal safety features of self-inflating bags, flow inflating bags, and T-piece resuscitators are explained.
Step-by-step explanation:
Self-inflating bag: The principal safety feature of a self-inflating bag is a one-way valve that allows air to enter the bag when squeezed and prevents air from escaping when released. It also has a pressure relief valve to prevent over-inflation and potential trauma to the patient's lungs.
Flow inflating bag: The principal safety feature of a flow inflating bag is a pressure relief valve that automatically opens if the pressure inside the bag exceeds a certain limit. This prevents over-inflation and ensures that the bag does not deliver excessive pressure to the patient's airway.
T-piece resuscitator: The principal safety feature of a T-piece resuscitator is a pressure-limiting valve that prevents excessive pressure from being delivered to the patient's lungs. This ensures that the resuscitator does not cause barotrauma or other injuries to the patient's respiratory system