EP1942970A1

EP1942970A1 - Laryngeal mask adapted for the introduction and removal of an intubation probe

Info

Publication number: EP1942970A1
Application number: EP06841995A
Authority: EP
Inventors: Bruno Bassoul
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-03
Filing date: 2006-11-03
Publication date: 2008-07-16
Also published as: FR2892636A1; US20080276932A1; CA2628381A1; WO2007051950B1; WO2007051950A1; FR2892636B1

Abstract

The invention relates to a laryngeal mask (21) which is to be introduced into the larynx of a patient and comprises at least one tubular structure that protrudes into the region of the vocal chords of the patient, enabling the introduction of a mandrel and/or an intubation probe (29), and comprises means for removing the mandrel or the intubation probe, said removal means being such that the tubular structure is open over at least part of the length thereof in order to enable the removal of the mandrel or the intubation probe (29) once it has been introduced.

Description

Title of the invention

Laryngeal mask adapted to the introduction and release of an intubation probe.

Background of the invention

The present invention relates to the general field of devices used in anesthesia, resuscitation and medical emergencies. More specifically, the invention relates to laryngeal masks.

Such laryngeal masks are used for airway management, especially in anesthesia.

A first type of known mask 11 is shown diagrammatically in FIG. 1. It comprises a tubular structure 12 and at least one inflatable sealing pad 13 connected to the end of the tubular structure 12. When this end is introduced at the level of larynx of the patient, the sealing pad 13 is placed at the entrance of the trachea artery of the patient at the vocal cords to ensure sealing by swelling of the pad 13. In the example shown in Figure 1, the pad inflatable sealing 13 has the shape of an ovoid ring and is connected to a web 14. The tubular structure 12 opens on an orifice 14 'of the web 14. In other embodiments of laryngeal masks performing the same functions, the Sealing pad is a simple balloon of substantially spherical shape and the tubular structure includes an orifice above the balloon. Such an orifice is intended, as the orifice 14 'of the web 14, to be placed at the entrance of the trachea of the patient. Such laryngeal masks make it possible to achieve a safe respiratory route through which the assisted or spontaneous ventilation of the patient is performed. They can also optionally dintuber the patient with an intubation probe.

However, to intubate the patient, it is necessary to interrupt the assisted or spontaneous ventilation of the patient during, at least, the time necessary to slide the intubation probe 19 in the tubular structure 12 of the laryngeal mask 11. When the patient is difficult to intubate for various reasons that may be due in particular to its morphology or its corpulence, several tests interrupted by ventilation phases are often necessary. The intubation operation is often painful and takes time. These masks are therefore unsuitable for emergency intubation conditions where it is necessary to act quickly and efficiently.

In addition, when it is desired to remove a laryngeal mask after placement of the intubation catheter or mandrel, it has been observed that there is a high risk of detrimental movement or even dislodgement of the catheter. chuck even when the sealing pad is deflated.

OBJECT AND SUMMARY OF THE INVENTION The main object of the present invention is to overcome such drawbacks by proposing a laryngeal mask comprising at least one tubular structure intended to open at the level of the patient's vocal cords, allowing the insertion of a mandrel and or an intubation probe, and comprising means for releasing the mandrel or the intubation probe, these release means being such that the tubular structure is open over at least a part of its length in order to allow releasing the mandrel or intubation probe after he or she has been introduced.

Such a mask makes it possible to consider an easy intubation and emergency, including to set up an artificial ventilation. The laryngeal mask according to the invention is easy to set up and makes it easy to slide an intubation probe. The practitioner can indeed rely on the tubular structure which rests on the posterior part of the oropharynx to slide the intubation probe or the mandrel around which will slide the tubular intubation probe. The laryngeal mask is a sort of slide that guides the probe to the patient's trachea.

Once the intubation probe (s) put in place, the laryngeal mask according to the invention is easily removed since the tubular structure that has allowed the introduction of the probe is open on at least part of its length and therefore, the intubation probe is easily released from the open tubular structure. The extraction of the laryngeal mask thus does not cause unintended movement of the probe or the set up.

With a laryngeal mask according to the invention, it is therefore possible to act very quickly to set up an intubation probe. Advantageously, the tubular structure is open over its entire length. With such a characteristic, it ensures a great ease of release of the intubation probe. The laryngeal mask is indeed completely independent of the intubation probe and there is absolutely no need to slide it along the probe and disconnect the probe to separate the mask from the probe.

According to a particular feature of the invention, the mask comprises at least one inflatable pad called release placed at the end of the open tubular structure intended to be introduced at the larynx of a patient, the inflatable pad being adapted to be slipped under the lingual mass and lift it to clear the view towards the vocal cords when inflated.

Coming in a bridge above the tubular structure Advantageously, two inflatable relief pads are placed on either side of the open tubular structure. According to an advantageous characteristic of the invention, the laryngeal mask comprises at least a second tubular structure intended to open at the patient's vocal cords and allowing at least ventilation of the patient.

With such a characteristic, ventilation of the patient is ensured by the second tubular structure, even during the introduction of the intubation probe which takes place in parallel with the ventilation along the open tubular structure forming a kind of slide for the probe.

Once the intubation probe has been introduced, the laryngeal mask, which has provided ventilation for the time to introduce the intubation probe, can be removed. Thus, the ventilation is not interrupted. It is well understood here that the tubular structure for the introduction of an intubation probe can be used for any kind of intubation of the airways, including using a fiberscope. This tubular structure in fact opens a path independent of the pathway for ventilating the patient. A use for various surgical or medical operations of such an independent access way may be considered, if it is useful to be able to perform such operations by maintaining ventilation of the patient and without disturbing or interrupting it.

According to another advantageous characteristic of the invention, the laryngeal mask comprises at least one inflatable release and sealing pad connected to the end of the tubular structure intended to be introduced at the level of the larynx of the patient, this pad being intended to be placed at the entrance of the trachea artery at the level of the vocal cords.

Advantageously, the inflatable sealing pad has the shape of an ovoid ring connected to a sheet. According to one embodiment of the invention, the tubular structure allowing the introduction of a mandrel and / or an intubation probe open over at least a part of its length is located between two other closed tubular structures of which at least one allows ventilation of the patient.

With this feature, there is an additional pathway for performing either additional intubation, or to connect the patient's airway to an external device.

In one embodiment of the invention, the release means include at least one inflatable balloon whose swelling state allows or not this release.

In a particular embodiment of the invention, the inflatable balloon of the release means is said inflatable sealing pad, the ovoid ring being severed at its connection with the end of the tubular structure, the section of the ring being adapted to close when the seal pad is inflated and to open to release the intubation probe or tubular structure when the seal pad is deflated.

According to an advantageous characteristic, the laryngeal mask comprises at least one inflatable pad said placement of the mandrel or the intubation probe at the outlet of the tubular structure for the introduction of a mandrel or an intubation probe.

In a particular embodiment of the invention, the placement pad of the mandrel or the intubation probe is located on the web.

According to one particular characteristic, the laryngeal mask comprises integrated glottis visualization means. In an interesting embodiment, the display means are made with an optical fiber or a distal digital optical sensor integrated (e) to a tubular structure or a support of the tubular structures.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present invention will be apparent from the description given below, with reference to the accompanying drawings. which illustrate an example of realization devoid of any limiting character. In the figures:

- Figure 1 is a schematic representation of a first laryngeal mask according to the prior art; FIGS. 2a and 2b are a perspective and top view of a schematic representation of a laryngeal mask according to one embodiment of the invention;

FIGS. 3a, 3b and 3c are respectively a schematic representation of a laryngeal mask according to a second embodiment of the invention and two sections of this laryngeal mask;

FIG. 4 is a section of a particular embodiment of a laryngeal mask according to the invention;

- Figure 5 shows a laryngeal mask according to a particular embodiment of the invention.

Detailed description of an embodiment

Figures 2a and 2b show a laryngeal mask 21 according to a first embodiment of the invention.

The laryngeal mask 21 comprises a tubular structure 22 open over its entire length.

The tubular structure 22 is structurally such that it has substantially the shape of a sort of slide allowing, by sliding, the introduction of an intubation probe 29 sheathed or not on a long mandrel protruding from the tubular structure 22, a mandrel or a conventional fiberscope. The long mandrel is typically a guide mandrel of 40 centimeters or more.

In the example shown, the tubular structure 22 is provided with two so-called release pads 23 and 23 'placed on either side of the tubular structure 22. The function of these pads 23 and 23' is to be introduced under the lingual mass of the patient and to be inflated to lift this lingual mass and clear the view towards the vocal cords. This characteristic is particularly advantageous when the patient is in the supine position. The pads 23 and 23 'can be separated from the point of view of their inflation or be connected to one another so that they can be inflated at the same time. The connection between the two pads 23 and 23 'can be achieved by the presence of a channel formed on the bottom of the tubular structure 22 at its end. A single inflatable release pad making a kind of bridge on the tubular structure 22 can also be implemented.

The laryngeal mask 21 shown in Figure 2 is very simple to manufacture and use. It is useful for setting up an intubation tube with limited risk of injury to the patient. In emergency situations where such intubation must be performed quickly, such a mask is therefore an important aid to guide the practitioner's actions. It has the added advantage of clearing the patient's airways. It is thus a tool of comfort and efficiency at the intervention allowing to accelerate the introduction of the various tools to set up an artificial respiration, a fibroscopy ...

Advantageously, visualization means making it possible to see the glottis are used once the mask 21 has been introduced into the larynx of the patient. The mask 21 given as an example in FIG. 2 does not have integrated visualization means and it will therefore be necessary to use an optical means, for example a fiberscope, introduced in the manner of the probe 29, by the tubular structure 22. The optical means is then either removed or held in place during intubation, which is then facilitated by the information provided by this visualization of the glottis.

Nevertheless, as will be seen later, the mask could itself be equipped with an integrated visualization means, for example an optical fiber or a digital camera sensor.

Figure 3 shows a schematic representation and two sections of a laryngeal mask 31 according to another embodiment of the invention. The laryngeal mask 31 of this figure comprises a first tubular structure 32 open over a part of its length in which an intubation probe 39 can be introduced and a second tubular structure 35 intended in particular for ventilating V of the patient, assisted or spontaneous, even during the introduction of an intubation probe 39.

This makes it possible to retain the possibility of using a closed tubular structure to ventilate the patient in a manner known from the prior art and the other tubular structure, open, to introduce a mandrel or an intubation probe or a fiberscope. The ventilation can be performed either in an assisted manner, or spontaneously once the mask 31 is set up next to the vocal cords, at the larynx. In the case where ventilation V is assisted, the tubular structure 35 is connected by known means to an assisted ventilation unit as commonly used in anesthesia. Indeed, the tubular structure advantageously has means for allowing the connection of a conventional ventilation unit including a balloon, a corrugated connection, an antibacterial filter.

The mask shown in FIG. 3 has two tubular structures of identical diameter, but the tubular structures could also be of different diameters (6 mm for ventilation and 12 mm in open section for introducing the probe, for example). have distinct material characteristics (presence of an armature to protect the tubular structure intended to ventilate the patient's bites ...).

In FIG. 3, the two tubular structures 32 and 35 are connected at one of their ends to an inflatable sealing pad 33 in the form of an ovoid ring connected to a sheet 34 that the tubular structures 32 and 35 intersect in two orifices. 34 'and 34 "The end of the laryngeal mask

31 introduced at the larynx is thus in the form of an elongated and ovoid funnel with a large cranio-caudal axis.

The inflatable sealing pad 33 in the form of an ovoid ring has a section 33 '.

In order to allow the introduction of assisted ventilation V before introducing the probe 39, it is possible, for example, to provide the laryngeal mask with a diaphragm stopper at the intersection 34 'of the tubular structure.

32 with the web 34. It is also advantageous to place an inflatable balloon on the posterior zone of the intersection 34 'of the tubular structure 32 with the web 34. This balloon once inflated will obstruct the intersection 34' and stick to pad 33 under section 33 '. The operation of the laryngeal mask 31 will then be similar to that known in the prior art. It may also be, prior to the introduction of the laryngeal mask 31, placed the probe 39 in the open tubular structure 32 and use the balloon conventionally attached to the end of such a probe 39 to plug the intersection 34 'between the tubular structure 32 and the web 35 to allow ventilation V assisted by the tubular structure 35, the probe 39 is then obstructed by a plug.

According to the embodiment shown in Figure 3, the first tubular structure 32 is open on a portion L of its length. Such a opening 32 'allows to release the intubation probe 39 of the tubular structure 32 after it has been introduced.

The inflatable sealing pad 33 is such that it has a section 33 'on its circumference at the intersection of the first tubular structure 32 open to a length L. As illustrated by dashed lines in FIGS. 3b, this section 33 'can open and close depending on the swelling state of the sealing pad 33. On the section of Figure 3b, it is understood that the opening of the section 33' when the Sealing pad 33 is deflated allows the release of an intubation probe engaged in the tubular structure 32. The tubular structure 32 is then open over its entire length. When the pad 33 is inflated as shown in dashed lines in Figures 3a and 3b, the section 33 'is closed and sealing is ensured.

In the section of FIG. 3c, as shown in dotted lines, the tubular structures 32 and 35 are advantageously integrated in a support 37. This support 37 must have dimensions such that they allow an easy and safe introduction of the laryngeal mask 31 to the larynx of the patient. The tubular structure 32 has, in this example, a section which closes slightly. However, it is conceivable that the tubular structure 32 is open so that the section is a semicircle or a portion of a semicircle, thus making a kind of toboggan or gully in which the probe 39 comes to slide. It is found that the tubular structure may have a section other than circular and have for example a flat bottom.

It is also noted that, in an advantageous embodiment variant, the tubular structure 35 has a circular section at the end which is intended to be connected to external ventilation devices, this section becoming a crescent-shaped section. so that the closed tubular structure 35 lines the bottom of the tubular structure 32 open, the open tubular structure 32 then being present on the laryngeal mask at the portion of the mask to be placed in the mouth of the patient and not up to the outer end of the mask. This limits the size of the support to that of the tubular structure 32.

Since the laryngeal mask 31 comprises a sealing pad 33, it is useful, once assisted ventilation is activated with the tubular structure 35 of the laryngeal mask 31, and before the introduction of an intubation probe, to seal the tubular structure 32 by a plug. This plug is for example constituted by a simple shutter installed before the introduction of the mask 31 or constituted by a diaphragm device for controlling the shutter. Diaphragm devices of the type of introducers used in laparoscopy can be implemented. Thus, the open tubular structure 32 may be equipped with a diaphragm for the introduction of a mandrel or an intubation probe while retaining the sealing functions of the mask. The diaphragm allows the introduction of a mandrel on which will slide an intubation probe 39 after removal of the mask or, directly, an intubation probe 39 introduced or not on a mandrel, for example PVC or Vynil , in the case where the internal diameter of the tubular structure allows the passage of the probe 39.

It should be noted that the laryngeal mask 31 advantageously includes visualization means 36 integrated in the mask itself and making it possible to see the glottis when the mask 31 is introduced into the larynx of the patient in order to avoid introduction of the laryngeal mask 31 to the blind. The viewing means 36 are here advantageously made from optical fibers or else from distal sensors of the CCD camera type, integrally molded in one of the tubular structures 32 and / or 35 or in the support 37 when the latter is present. It is possible to open the optical fibers at various points 36 of the web 34 as shown in Figure 3a. We can then check the anatomy of the glottis and know if the patient has an asymmetry in the area of the vocal cords and therefore choose one side or the other to achieve the easiest intubation. One chooses between the open tubular structure, the most advantageous, or, where appropriate, a large asymmetry, the other tubular structure 35 which can also be used to perform the intubation. In this case, however, it will not be possible to realize by the tubular structure 35 a simultaneous ventilation at the introduction of the intubation probe 39.

The display means 36 advantageously include image acquisition means and lighting means. These integrated visualization means 36 are particularly useful when introducing an intubation probe 39 subsequent to that of the laryngeal mask 31. The mask 31 itself then provides a lighting solution for the insertion of the probe. intubation 39.

The display means may also be constituted by a camera, for example a CCD sensor. A miniaturized camera of the webcam type or a camera of the type known in the field of mobile phones could also be integrated into a mask according to the invention. These visualization means using an optical sensor for a digital image could be mounted at the end of the intubation mandrels with, optionally, a cable for connecting them to a display stage. A detachable ring of the sensor and its optional cable with the mandrel is advantageously used. The laryngeal mask can then be slid while keeping the mandrel in place, and the mandrel inserted into the intubation probe to slide it to the patient's trachea.

According to the laryngeal mask model used, the visualization means may be either coaxial with the intubation means (namely the intubation or mandrel probes) or lateral and in these cases integrated into the laryngeal mask. Also, with a mask having no such integrated display means, it is noted that it is always possible, as described with reference to FIG. 2 and thanks to the invention, to introduce an optical fiber, a camera or, again, a fiberscope, by one of the tubular structures without having to stop the ventilation of the patient, carried out using the other tubular structure. Such coaxial viewing means are then either removed or held in place during intubation which is then facilitated by the information provided by this visualization of the glottis. FIG. 4 is a section at the same level as the section of FIG.

3b of a particular embodiment of a laryngeal mask according to the invention. The laryngeal mask 41 according to this embodiment comprises a first semi-open tubular structure 42 into which an intubation probe, a second tubular structure 45 for ventilating the patient and an inflatable cushion 43 intended to be ventilated can be introduced. placed at the level of the vocal cords at the entrance of the trachea artery when the laryngeal mask 41 is introduced into the larynx of a patient. It further comprises a second so-called release pad 48 placed on the sealing pad 43, this second release pad 48 being intended to allow or not the release of an intubation probe introduced into the tubular structure 42 as a function of his state of swelling. In Figure 4, the release pad 48 is inflated and the release is prevented. This embodiment makes it possible to dissociate the release of the probe from the sealing function performed by the pad 43 of the laryngeal mask. Figure 5 shows a laryngeal mask 51 according to a particular embodiment of the invention. This laryngeal mask 51 has three tubular structures 52, 55 and 60, two closed 52 and 55 and one open 60 leading to a sheet 54 stretched on an inflatable sealing pad

53. The open tubular structure 60 is here advantageously placed between the two closed tubular structures 52 and 55. The third open tubular structure 60 is thus advantageously constituted by the neck between the two closed tubular structures 52 and 55. This makes it possible not to increase importantly the overall size of the mask 51 while having three tubular structures. Note that the mask 51 being symmetrical it allows to choose a particular side to intubate the patient according to his anatomy.

This mask 51 makes it possible, for example, to dintuber the patient with an intubation probe 59 by the open tubular structure 60 at the same time that the patient is ventilated V by one of the closed tubular structures, for example 52, and which is visualized. the placement of the probe with respect to the vocal cords by means of a fiberscope 61, for example, introduced into the second closed tubular structure 55. The mask 51 advantageously comprises an inflatable airbag 53 having a section 53 'at the intersection of the open tubular structure 60 with the sheet 54. Thus a mandrel, a fiberscope 61 or a probe 59 introduced into the open tubular structure 60 can be easily released after deflation of the sealing pad 53. Advantageously, the laryngeal mask 51 is equipped with an inflatable cushion 62 said placement located at the outlet of at least one of the tubular structures. This placement pad 62 makes it possible, when an intubation probe 59 or a fiberscope 60 is introduced into said tubular structure, for example 60, to incline its angle of penetration towards the vocal cords. This is very useful in practice to facilitate the intubation operation. Indeed one avoids having to incline the mandrel, the probe 59 or the fiberscope 60 by hand, which is always a delicate operation.

Advantageously, the laryngeal mask 51 comprises integrated viewing means 56 of the type shown in the description of FIG. 3.

The laryngeal masks according to the invention can be made in several sizes in order to make it possible to use it for patients with various size and weight characteristics. For example, making masks in four to five sizes can be considered. In this case, as an indication, the internal diameters of the tubular intubation structures may be: Size 1: 6.5 mm; Size 2: 7 mm; Size 3: 8 mm; Size 4: 8.5 mm;

Size 5: 9 mm; etc. up to an internal diameter of 13 mm or more The tubular structure intended for ventilation may be of the same size, as in the case of Figure 2, or have a reduced cross-section with respect to the size of the tubular structure used for ventilation. intubation.

The sizes given above allow the passage of an intubation probe with a maximum diameter of 0.5 mm smaller. Such a probe is positionable under view control when integrated viewing means are available, with or without the aid of a mandrel. The introduction of the probe can also be carried out with the aid of a fibroscope introduced beforehand and which has a position pressed against the rear wall of the tubular structure in which it was introduced and in front of the vocal cords.

According to a sequence of advantageous operations of using a laryngeal mask according to the invention, the laryngeal mask is introduced at the larynx of the patient. A fiberscope is then introduced into one of the tubular structures, the one that has the release means when they are present, to be positioned between the two vocal cords of 2 or 3 centimeters and in front of the tracheal carene of the patient.

The visualization allowed by the fiberscope can be done on a video screen, for example mounted on a bronchial, digestive or urological type endoscopy column. The visualization on screen allows to leave free the hands of the operator and not to overload by weight the laryngeal mask. The progression of the laryngeal mask, its implementation and the release of the vocal cords after inflation of the inflatable sealing pad are advantageously monitored using such display means. The visualization makes it possible to adapt the progression of the intubation probe with or without a guide mandrel. It is easy to evaluate the difficulty of intubation by visualizing the glottis beneath the monkfish epigree.

In the case where a hollow mandrel is used, the mandrel is then slid between the two vocal cords on the fiberscope and is then held by hand once it has reached the trachea. At this time, either remove the fibroscope first if it does not appear necessary then the laryngeal mask, or, under control of the view, first the laryngeal mask by the mouth and then the fiberscope. A final intubation probe is then slid on the mandrel.

In this intubation sequence, the tubular structure for intubation is used to first visualize the area of the glottis and then to prepare the final introduction of the intubation probe by introduction of a mandrel.

The laryngeal mask is advantageously made of synthetic material without latex, for example, silicone, PVC or related. This material can be reinforced by a metal frame to keep its shape while maintaining its flexibility. It is said that the mask is armed. The tubular structures are advantageously flexible and may be previously bent to facilitate insertion of the mask at the vocal cords of the patient.

The invention thus makes it possible to incubate a patient and to visualize the glottis while maintaining the ventilation of the patient.

In addition, compared with facial masks sometimes used to maintain ventilation during intubation, the laryngeal mask according to the invention comprises a protected die for the introduction of the fiberscope. The latter is thus isolated in a sterile manner and it becomes possible to reuse it. The laryngeal mask according to the invention also facilitates traditional orotracheal intubation to the laryngoscope. This is particularly useful for patients having difficulty with such intubation.

Finally, the use of the laryngeal mask according to the invention is not practiced freehand but based on the posterior portion of the larynx opposite the vocal cords.

Finally, we note that various implementations can be made according to the principles of the invention. In particular, the tubular structures may have various types of circular and non-circular sections in that their particular characteristics allow the realization of the functions defined according to the principles of the invention set forth in the following claims.

Claims

1. Laryngeal mask (21) intended to be introduced at the level of the larynx of a patient comprising at least one tubular structure intended to open at the level of the patient's vocal cords, allowing the introduction of a mandrel and / or a intubation probe (29), and comprising means for releasing the mandrel or the intubation probe, said release means being such that the tubular structure is open over at least a part of its length in order to allow the release mandrel or intubation probe (29) after he or she has been introduced.

2. Laryngeal mask (21) according to claim 1, wherein the tubular structure is open over its entire length.

3. Laryngeal mask according to one of claims 1 and 2, comprising at least one inflatable pad called release placed at the end of the tubular structure intended to be introduced at the larynx of a patient, the inflatable pad being suitable to be slipped under the lingual mass and to raise it so as to clear the view towards the vocal cords when inflated.

Laryngeal mask according to claim 3, wherein two inflatable relief pads are placed on either side of the tubular structure.

5. Laryngeal mask (31) according to one of the preceding claims, comprising at least a second tubular structure (32, 35) for opening at the vocal cords of the patient and allowing ventilation (V) of the patient.

Laryngeal mask (21) according to claim 5, comprising at least one inflatable cushion (33) connected to the end of the tubular structures (32,35) to be introduced at the patient's larynx, this pad ( 23) being intended to be placed at the entrance of the trachea artery at the level of the vocal cords to ensure sealing.

Laryngeal mask (21) according to claim 6, wherein the airbag (23) sealing is in the form of an ovoid ring connected to a web (24).

8. Laryngeal mask (51) according to one of claims 5 to 7, wherein the tubular structure (60) for introducing a mandrel and / or an intubation probe (59) open on at least a part of its length is located between two other closed tubular structures (52, 55), at least one of which (52) allows ventilation (V) of the patient.

9. Laryngeal mask (41,31) according to one of the preceding claims, wherein the release means include at least one inflatable balloon (48,33) whose swelling state allows or not this release.

The laryngeal mask (31) according to claims 7 and 9, wherein the inflatable balloon is the inflatable cushion (33) sealing, the ovoid ring being severed at its connection with the end of the tubular structure, the section of the ring (330 being adapted to close when the sealing pad (33) is inflated and to open to release the intubation probe (39) when the sealing pad (33) is deflated .

11. Laryngeal mask (51) according to one of the preceding claims, comprising at least one inflatable pad (62) said placement of the mandrel or the intubation probe (59) at the outlet of the tubular structure (60) allowing introducing a mandrel or intubation probe (59).

The laryngeal mask (51) according to claims 7 and 11, wherein the placement pad (62) of the mandrel or intubation probe (59) is located on the web (54).

13. Laryngeal mask (31) according to one of the preceding claims, comprising viewing means (36) of the integrated glottis.

The laryngeal mask (31) according to claim 12, wherein the viewing means (36) is made with an optical fiber or a distal digital optical sensor integrated with one of the tubular structures (32,35) or a support (37) of the tubular structures (32,35).