CN213432385U

CN213432385U - Anti-backflow inflation-free sealing laryngeal mask

Info

Publication number: CN213432385U
Application number: CN202021779312.4U
Authority: CN
Inventors: 赵华良; 刘守奎
Original assignee: Hangzhou Fushan Medical Appliances Co ltd
Current assignee: Hangzhou Fushan Medical Appliances Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-06-15
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses an anti-backflow inflation-free sealed laryngeal mask, which comprises a main pipe and a mask sac spliced and formed with the main pipe, wherein an air guide pipeline communicated with the inner cavity of the mask sac is arranged in the main pipe, the mask sac adopts an inflation-free mask sac, and the sac wall of the mask sac is of a structure with thick bottom and thin upper end; the cover bag is equipped with the opening with the inner chamber intercommunication near the front end position on the upper surface, the cover bag is equipped with the ridge-like arch perpendicular with cover bag extending direction before the rear end of upper surface and the opening, the lower surface bilateral symmetry of cover bag is equipped with two rows and prevents the refluence hole. By utilizing the utility model, the ventilation effect of the laryngeal mask can be ensured without aeration during use, and the phenomenon of content reflux and aspiration of stomach can be continuously and effectively avoided during the respiratory support period.

Description

Anti-backflow inflation-free sealing laryngeal mask

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to an anti-reflux exempts from to aerify sealed laryngeal mask.

Background

The laryngeal mask is successfully developed and used in clinic in the middle of 80 years, and is introduced in 90 years in China. The application of the laryngeal mask is greatly developed at present, and the application range is wider and wider.

Laryngeal masks, as a medical device for maintaining the respiratory ventilation of patients, are widely used in clinical anesthesia, emergency or resuscitation due to their non-invasive airway characteristics. With the progress of materials and technology, various improved laryngeal masks are in clinical use, but the laryngeal masks in the prior art have many problems.

Most of the existing laryngeal masks adopt an air bag or a soft rubber ring to surround the glottis to implement a sealing effect, the sealing essence is that the air bag or the soft rubber ring presses the throat mucosa surrounding the glottis, the pressure of the air bag or the soft rubber ring is vertical to the pressure of gas leakage, the sealing effect is poor, the clinical sealing effect is achieved, larger pressure is needed, and the postoperative throat pain of a patient is often caused; when the pressure is low, gas leakage often occurs, which leads to failure of ventilation or aspiration of oral water flowing into the airway.

In the process of using the common laryngeal mask before a hospital, a plurality of problems occur, wherein an airway cannot be opened or is partially opened, and the laryngeal mask is soft, folded and deformed to shield a living mouth. Significant air leakage occurs: the edge of the laryngeal mask air bag is extruded, deformed, wrapped and inverted, so that air leakage is obvious, and the laryngeal mask air bag needs to be reinserted under the direct vision of a laryngoscope. The difficulty mainly lies in that the cover sac of the laryngeal mask is made of softer silica gel materials, and the risks of torsion and poor positioning of the front end of the laryngeal mask are increased.

Due to the structural characteristics of the laryngeal mask, the esophageal sphincter can not be completely closed and the airway can not be absolutely closed when the laryngeal mask is inserted into the hypopharynx cavity. When the intra-abdominal pressure or the intra-gastric pressure is increased, the gastric contents flow back into the esophagus and further flow back upwards to the entrance of the esophagus or even to the oral cavity, the backflow matters can be sucked into the trachea along with the positive pressure ventilation by mistake, the backflow occurrence rate is 0.02%, the death rate after the aspiration is 5%, the phenomena of backflow and aspiration of the gastric contents are avoided, and the aspiration is one of the serious complications possibly caused by the laryngeal mask ventilation.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a backflow-preventing inflation-free sealing laryngeal mask, which can ensure the ventilation effect of the laryngeal mask without inflation during the use and can continuously and effectively avoid the backflow of gastric contents and the phenomenon of mistaken inhalation during the respiratory support period.

The technical scheme of the utility model as follows:

an anti-backflow inflation-free sealed laryngeal mask comprises a main pipe and a mask sac which is bonded with the main pipe to form a shape, wherein an air guide pipeline communicated with an inner cavity of the mask sac is arranged in the main pipe, the mask sac is an inflation-free mask sac, and the sac wall of the mask sac is of a structure with a thick bottom and a thin upper end;

the cover bag is equipped with the opening with the inner chamber intercommunication near the front end position on the upper surface, the cover bag is equipped with the ridge-like arch perpendicular with cover bag extending direction before the rear end of upper surface and the opening, the lower surface bilateral symmetry of cover bag is equipped with two rows and prevents the refluence hole.

The laryngeal mask adopts the self-sealing design, the mask sac seals the periphery of the larynx, the bottom is thick, the upper end is thin, and the mask sac can be more attached to the pharyngeal cavity tissue during positive pressure ventilation, so that an inflation-free mask sac structure is realized; by providing the ridge-like elevation, a more effective seal can be provided for the pharynx during use; meanwhile, two rows of anti-backflow holes are formed in the lower surface of the mask bag, so that the phenomena of backflow and aspiration of gastric contents can be continuously and effectively avoided during the respiratory support period.

In the utility model, the ridge-shaped bulge has enough elasticity to keep the throat of the principle in use.

In order to increase the elasticity of the cover bladder and the resistance of the ridge to collapse at the level, the ridge is provided with a depression on both sides. The depressions provide the necessary rigidity during use so that the capsule is still flexible enough to conform to the pharynx of the human body and avoid irritation of the pharynx.

Preferably, each row of anti-backflow holes is provided with 3-6 anti-backflow holes. The double-row backflow-preventing holes are formed in the two sides of the lower surface of the cover bag, so that the strength of the cover bag is improved, the cover bag is not prone to deformation, the weight of the cover bag is reduced, and the cover bag is more fit for a human body.

Further, in each row of anti-backflow holes, the hole edges facing the inner side of the lower surface of the mask bag are flush, and the shape of the hole edges facing the outer side of the lower surface of the mask bag is matched with the contour of the lower surface of the mask bag.

The upper end of the main pipe is provided with a hard air source joint. The strength of the hard air source joint is increased, the ventilation inlet is protected, and the phenomenon that the ventilation inlet is deformed to influence oxygen supply after being bitten by teeth is avoided.

Furthermore, the included angle between the main pipe and the cover sac ranges from 110 degrees to 160 degrees.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a compact structure reduces the complexity and the use cost of laryngeal mask, need not aerify during the use and just can ensure the ventilation effect of laryngeal mask, can realize the pressure regulation of secretion attraction in-process, avoids the stifled dead air flue of epiglottis, improves stability and the reliability of using.

2. The self-sealing design of the utility model, the mask bag seals the periphery of the larynx, the bottom is thick, the upper end is thin, when positive pressure ventilation is carried out, the mask bag can be more attached to the pharyngeal cavity tissue, the reinforced sealing is realized, the problem that the laryngeal mask with the inflatable bag has poor sealing effect, the clinical sealing effect needs larger pressure, and the postoperative throat pain of a patient is often caused is solved; the problem of inflation pressure lower often take place gas leakage, lead to the failure of ventilating or oral siphon admission air flue to take place the mistake and inhale has still been solved.

3) The utility model discloses a set up two rows and prevent the refluence, the phenomenon of inhaling by mistake of the stomach content that can continuously effectively avoid taking place during breathing support.

Drawings

Fig. 1 is a schematic view of the overall structure of an anti-backflow inflation-free sealing laryngeal mask of the present invention;

fig. 2 is a schematic view of the bottom surface of the anti-backflow non-inflatable sealing laryngeal mask of the present invention.

Detailed Description

The invention will be described in further detail with reference to the following figures and examples, which are intended to facilitate the understanding of the invention without limiting it.

As shown in fig. 1 and 2, the anti-backflow inflation-free sealed laryngeal mask comprises a main pipe 1 and a mask sac 2 bonded with the main pipe, wherein an air guide pipeline communicated with an inner cavity 3 of the mask sac 2 is arranged in the main pipe 1.

Cover bag 2 is for exempting from to aerify the cover bag, adopts the fabulous silica gel material of elasticity, and the design of cover bag 2 is thicker, and the cover bag 2 of being convenient for has sufficient support capacity, and the upper end design is thinner, and the material is soft, and in the operation process, the malleation is ventilated, can pass through the extrusion of oxygen malleation, makes the thin bag part in cover bag 2 upper end, pastes tight pharyngeal cavity tissue more, reaches self sealss function, and that is to say the malleation is higher, and sealed effect is better.

The cover bag 2 is provided with an opening 4 communicated with the inner cavity 3 at the position close to the front end of the upper surface, a ridge-shaped bulge 5 vertical to the extending direction of the cover bag 2 is arranged in front of the opening 4 and the rear end of the upper surface of the cover bag 2, a recess 6 is arranged between the rear end of the upper surface of the cover bag 2 and the ridge-shaped bulge 5, and two rows of anti-backflow holes 7 are symmetrically arranged on two sides of the lower surface of the cover bag 2.

In this embodiment, each row is provided with 5 anti-backflow holes 7. In each row of anti-backflow holes, the hole edges facing the inner side of the lower surface of the mask bag 2 are flush, and the shape of the hole edges facing the outer side of the lower surface of the mask bag 2 is matched with the contour of the lower surface of the mask bag 2.

Double rows of anti-backflow holes are designed on two sides of the lower surface of the cover bag 2, once backflow occurs, the anti-backflow holes 7 can store backflow liquid in the holes, and the phenomena of backflow and aspiration of gastric contents are avoided. The double-row backflow-preventing holes are formed in the two sides of the lower surface of the cover bag, so that the strength of the cover bag is improved, the cover bag is not prone to deformation, the weight of the cover bag is reduced, and the cover bag is more fit for a human body.

The upper end of the main pipe 1 is provided with a hard air source joint 8. The strength of the hard air source connector 8 is increased, so that the ventilation inlet is protected, and the phenomenon that the ventilation inlet is deformed after being bitten by teeth to influence oxygen supply is avoided.

In this embodiment, the angle between the main tube and the mask sac can be 110-160 degrees, and the mask sac is more fit with the pharyngeal portion of the human body.

The above-mentioned embodiment is to the technical solution and the beneficial effects of the present invention have been described in detail, it should be understood that the above is only the specific embodiment of the present invention, not used for limiting the present invention, any modification, supplement and equivalent replacement made within the principle scope of the present invention should be included in the protection scope of the present invention.

Claims

1. The anti-backflow inflation-free sealed laryngeal mask comprises a main pipe and a mask sac which is bonded with the main pipe to form a shape, wherein an air guide pipeline communicated with an inner cavity of the mask sac is arranged in the main pipe;

2. The anti-reflux and inflation-free sealing laryngeal mask of claim 1, wherein a depression is provided on both sides of the ridge.

3. The anti-backflow and inflation-free sealed laryngeal mask of claim 1, wherein 3-6 anti-backflow holes are formed in each row of anti-backflow holes.

4. The anti-backflow and inflation-free sealed laryngeal mask according to claim 3, wherein in each row of anti-backflow holes, the hole edges facing the inner side of the lower surface of the mask sac are flush, and the hole edges facing the outer side of the lower surface of the mask sac are shaped to match the contour of the lower surface of the mask sac.

5. The anti-backflow and inflation-free sealing laryngeal mask of claim 1, wherein a rigid air supply connector is disposed at an upper end of the main tube.

6. The anti-backflow and inflation-free sealing laryngeal mask of claim 1, wherein an included angle between the main tube and the mask cuff is 110-160 °.