In the anesthesia system, the anesthesia breathing circuit is the crucial channel connecting the patient to the anesthesia machine. It not only delivers oxygen and anesthetic gases and removes exhaled carbon dioxide, but also plays multiple roles in heat and moisture retention, resistance control, and gas mixing regulation. The proper selection of a circuit directly affects the safety, efficiency, and cost of anesthesia, as well as a hospital’s sustainability goals.

In the core environment of operating rooms and anesthesia management, the anesthesia breathing circuit plays a vital role in sustaining life, ensuring the effective delivery and exchange of oxygen and anesthetic gases during surgery. As a crucial component of this sophisticated system, the breathing bag—also referred to as the reservoir bag, rebreathing bag, or anesthesia bag—is far more than a simple accessory. Its design, material, and performance selection are matters of serious technical significance. The proper selection of a breathing bag profoundly impacts several key aspects: it directly relates to the patient’s essential safety assurance, the operational reliability of the equipment, and the overall cost-effectiveness of long-term use. Furthermore, the choice of material is closely associated with minimizing potential risks of cross-contamination and addressing patient-specific allergic sensitivities.

This seemingly basic airway tool truly embodies both the starting point of responsibility and the meaning of defense. Its performance — sealing reliability, tactile comfort, and breathing support efficiency — has become an increasingly vital component in ensuring clinical safety. A deep understanding of its clinical applications, along with the accurate identification and selection of high-performance masks, is a fundamental obligation for every medical institution entrusted with patient safety.

In airway management, the laryngeal mask airway (LMA airway) occupies an indispensable role, especially when endotracheal intubation is either not applicable or encounters significant obstacles. Whether used as a supportive tool for spontaneous breathing or as an adjunct for positive-pressure ventilation, the laryngeal airway demonstrates remarkable adaptability. Its applications extend from meticulously planned operating room environments to pre-hospital and in-hospital emergency rescue scenarios.

The laryngeal mask airway (lma airway) emerged as a revolutionary supraglottic airway management technology. With its remarkable convenience, ease of learning, and relatively gentle operational characteristics, it quickly attracted wide attention and adoption in the medical community. Today, the laryngeal airway is not only a fundamental tool commonly used during anesthesia induction and maintenance but also plays a crucial role in outpatient short procedures, primary healthcare institutions, emergency departments for difficult airways, and pre-hospital transport. Whether as a first-line approach or a backup plan, choosing the appropriate lma airways type and size is essential to maximize its effectiveness.