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US 2003/0192548 A1Published application
Laryngeal mask airway
AssigneeNone recorded
InventorTi-Li Chang
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AssigneeNone recorded
InventorTi-Li Chang
Estimating the term…
A laryngeal mask tube consists of a dual-airway tube (10), a mask (20) with an inflatable bladder (24) and an inflation indicator device (30). The dual-airway tube (10) comprises a simplified primary tube (12) and secondary tube (14) integrally combined together. The primary tube (12) communicates with the mask (20) to guide gas into the body of a patient and the secondary tube (14) communicates between with the bladder (24) and the inflation indicator device (30) to monitor and inflate the bladder (24). Moreover, two ribs (26) are formed in the mask to prevent blockage of the primary tube (12) and a tongue (242) is formed inside the bladder (24) to prevent the bladder (24) from folding and preventing a seal around the larynx. Whereby, the laryngeal mask airway is convenient and efficient to use.
A laryngeal mask airway adapted to be positioned over the larynx of a patient, and comprising:
Dependencies are inferred from the claim text.
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Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: tracheal tubes
Special features for tracheal tubes not otherwise provided for: with mean for closing the oesophagus
Devices for delivering substances into the body
Term end not estimated
1. Field of the Invention
The present invention relates to a laryngeal mask airway for use with patients who are not able to breathe, and more particularly to a laryngeal mask airway that is efficient and convenient to use.
2. Description of Related Art
FIG. 1 is a perspective view of a laryngeal mask airway in accordance with the present invention;
FIG. 2 is a cross-sectional side plan view of the laryngeal mask airway along line 2-2 in FIG. 1;
FIG. 3 is a top plan view of the laryngeal mask airway in FIG. 1;
With reference to FIGS. 1, 2 and 3, a laryngeal mask airway in accordance with the present invention comprises a dual-airway tube (10), a laryngeal mask (20) and a laryngeal mask inflation indicator device (30).
The dual-airway (10) has a connecting end and is composed of a primary tube (12) with an inner wall and a secondary tube (14) combined with the primary tube (12). The primary tube (12) is a large-bore tube made of resilient plastic material and communicates with the laryngeal mask (20) at the connecting end. The secondary tube (14) is formed inside walls of the primary tube (12) and emerges from the primary tube (12) a distance from laryngeal mask (20) to connect to the inflation indicator device (30).
The laryngeal mask (20) is teardrop-shaped to adapt to the larynx and is divided into a curved bottom face (not numbered) adjacent to the primary tube (12) and a bladder (24) around the curved bottom face. An opening (22) is defined in the curved bottom face to communicate with the primary tube (12) and at least one rib (26) radially and longitudinally projects from the inner wall of the primary tube (12) near the opening (22). The bladder (24) having a pointed end and a rear obtuse end is made of soft material such as polyvinyl chloride (PVC) and has a tongue (242) extending forward from the pointed end of the bottom face inside the bladder (24). The secondary tube (14) is attached to, communicates with and inflates the bladder (24) by a syringe connected to the inflation indicator device (30) via the secondary tube (14).