Functions and Characteristics of Gel-like Laryngeal Masks

Gel-like laryngeal mask is a supraglottic airway management device designed to replace tracheal intubation and traditional inflatable silicone laryngeal masks; it is used to establish a secure airway during anesthesia, emergency care, and resuscitation.

 

1. Intraoperative Ventilation and Oxygenation
For surgeries under general anesthesia (including minor procedures, prone or lateral positioning, and cases involving pediatric or obese patients), it maintains spontaneous breathing or mechanical positive-pressure ventilation; the sealed airway minimizes leakage and stabilizes oxygenation.

2. Airway Establishment for Emergency Resuscitation
Facilitates rapid airway opening during CPR, trauma care, pre-hospital transport, and battlefield first aid; allows for manual insertion without a laryngoscope and can be performed by a single operator, thereby reducing the time required to establish ventilation.

3. Prevents reflux and reduces the risk of aspiration
Dual-lumen design: Features a main airway and an independent gastric drainage channel; allows for the insertion of a gastric tube to decompress the stomach and evacuate accumulated gas and gastric fluid, thereby reducing the likelihood of gastric acid reflux and pulmonary aspiration.

4. Backup option for difficult airways
Serves as an alternative airway device in the event of failed intubation; provides an access channel for fiberoptic-guided intubation.

5. Minimizes airway trauma
Unlike tracheal intubation, it avoids friction or compression against the vocal cords and trachea; unlike inflatable laryngeal masks, it eliminates high-pressure compression of the pharyngeal mucosa and recurrent laryngeal nerve caused by the cuff.

 

 

1. Non-inflatable Gel Elastic Cuff
Constructed from medical-grade thermoplastic elastomer (SEBS gel), the cuff is integrally molded and requires no inflation, eliminating the need for inflation and cuff pressure monitoring. The soft gel material self-adapts to the pharyngeal anatomy, automatically conforming to the laryngeal inlet.
2. Latex-free and PVC-free
Prevents latex allergies and ensures compatibility with MRI scans, as there are no metal components to cause imaging artifacts.
3. Integrated Design
Features a built-in bite block, an epiglottis-positioning ridge, and an oral stabilization clip to prevent tube biting and rotation or displacement of the laryngeal mask.

 

1. Rapid insertion and ease of use
No inflation step is required; the device offers a high success rate for initial insertion and requires minimal training for medical staff, making it particularly advantageous in emergency and critical care settings.
2. Stable seal and high leak pressure
The gel conforms perfectly to the pharyngeal anatomy, achieving an average airway leak pressure of 26 cmH₂O; this minimizes leakage during positive-pressure ventilation and prevents anesthetic gas from escaping into the operating room. The device remains secure and resists displacement during patient repositioning (e.g., prone or lateral positions).
3. No risk of high-pressure mucosal injury
Traditional inflatable laryngeal masks carry a risk of excessive cuff pressure, which can lead to pharyngeal edema, sore throat, hoarseness, or nerve paralysis. In contrast, the gel provides static, uniform, and flexible contact with constant, gentle pressure, significantly reducing the incidence of postoperative pharyngeal discomfort.
4. Excellent adaptability to patient positioning
Resists displacement during prone or lateral surgeries, intraoperative repositioning, and long-distance transport (ambulance/helicopter), ensuring continuous and stable ventilation.
5. Dual-lumen protective design
Features separate channels for ventilation and gastric drainage, enabling simultaneous ventilation and gastric decompression; balances ventilation safety with aspiration prevention, making it suitable for prolonged surgeries.
6. Comprehensive range of sizes for all ages
Available in multiple sizes covering neonates, children, and adults, offering distinct advantages for pediatric anesthesia.
7. Sterile, individually packaged, single-use
Sterile and ready for single use to eliminate cross-infection; requires no cleaning or disinfection and is convenient to carry for pre-hospital emergency care.

 

 
1. The gel hardness is fixed, preventing fine-tuning of the sealing pressure (unlike with inflatable laryngeal masks); adaptability to extremely large or narrow pharyngeal anatomies is limited.
2. Large-bore tracheal tubes cannot be inserted directly through the laryngeal mask; its intubation-assist capability is inferior to that of intubating laryngeal masks.
3. The gel material has limited temperature resistance and cannot withstand repeated high-temperature sterilization; it is intended for single use only.

 

 
1. Traditional silicone laryngeal mask: The cuff requires inflation and periodic pressure monitoring; high pressure can easily cause sore throat, and changes in patient position make it prone to air leakage and displacement.
2. Gel-like laryngeal mask: requires no inflation, features gel-based adaptive fit, ensures uniform pressure and a stable seal, results in fewer postoperative complications, and offers higher efficiency in emergency care.