| 1 | Importantly, the entryway (or glottis) to the lungs could be closed. | |
| 2 | If the airway becomes distorted, releasing cricoid pressure may improve visualization of the glottis. | |
| 3 | Conclusion:The functions of both low and high voices decline in GCD patients . | |
| 4 | An assistant can gently pull the right side of the patient's lip and cheek to enhance visibility of the glottis. | |
| 5 | Laryngeal mask airway(LMA)is a kind of air breather above glottis between ventilation using endotracheal tube and face mask. |