WO2018060063A1

WO2018060063A1 - Laryngeal device comprising a slotted tube and a display screen

Info

Publication number: WO2018060063A1
Application number: PCT/EP2017/073981
Authority: WO
Inventors: Jean-Christophe OZENNE
Original assignee: Deltamedics
Priority date: 2016-09-27
Filing date: 2017-09-22
Publication date: 2018-04-05
Also published as: FR3056407A1; FR3056407B1

Abstract

Laryngeal device comprising a slotted tube and a display screen. This laryngeal device (2) comprises a tube (6) having a proximal end and a distal end, the tube (6) defining a main hole (22) extending along the longitudinal direction (12) of the tube (6) between the proximal end and the distal end, and a laryngeal protrusion (29) substantially forming an ellipsis around an opening located in the longitudinal extension (12) of the main hole (22), the laryngeal protrusion (29) being connected to the tube (6) by the distal end thereof, said device (2) further comprising a slot (50) extending over the tube (6) and/or over the laryngeal protrusion (29). The tube (6) comprises a first secondary hole (68) extending between the proximal end and the distal end and intended to receive a means for acquiring and transmitting an optical signal, the laryngeal device (2) comprising a screen for displaying an image constructed from said optical signal.

Description

Laryngeal device comprising a split tube and a screen

display

The present invention relates to a laryngeal device, and more particularly to such a device that can be used for setting up an intubation probe for human or animal use.

A laryngeal device is generally used to enable the artificial respiration of a patient, for example during an operation requiring a particular local anesthesia or general anesthesia.

In order to perform artificial respiration, intubation probes consisting of a tube comprising, at one of its ends, a connector for an artificial respiration unit, are generally used. The intubation probe is intended to be inserted through the patient's mouth so that the end opposite the connector is inserted into the patient's airways.

Such intubation probes present a risk of inserting the intubation probe into the esophagus. In this case, the air supplied by the artificial respiration unit reaches the stomach and not the lungs, which can cause the death of the patient. There is also the risk that aspiration of gastric contents occurs.

To overcome this drawback, it is possible, alternatively, to use a laryngeal device or laryngeal mask, comprising a tube delimiting a main hole. At one of its ends, the tube is extended into a laryngeal bead delimiting an opening extending in the longitudinal extension of the main hole. The laryngeal tube and liner are intended to be introduced into the patient 's airways, so that the laryngeal bead rests against the patient' s epiglottis and larynx. Thanks to the shape of the laryngeal bead, the seal is made with the digestive tract of the patient, the opening being fluidly connected with the patient's airways.

A laryngeal mask, however, has the disadvantage of not always ensuring a perfect seal against the digestive tract, so that the risk of aspiration of gastric contents is not completely ruled out and artificial respiration does not is not always implemented as expected. In addition, the laryngeal mask can attack or scrape the walls of the patient's airway against which it comes into abutment. This last disadvantage is also frequently encountered when using intubation probes.

To overcome these disadvantages, it has been proposed to use a laryngeal mask for the insertion of an intubation probe into the respiratory tract of a patient. Indeed, because it is inserted less far into the airways, the tube and the main hole of a laryngeal mask generally have diameters greater than the diameter of an intubation probe. It is then possible, once the laryngeal mask is in place, to insert an intubation probe through the main hole and to slide the intubation probe until it comes out of the opening of the bead. laryngeal and enters the patient's airways. Next, the laryngeal mask is slid in the disinsertion direction and the mask is removed from the patient's mouth to avoid maintaining a particularly invasive device for a long time in the patient's body.

In order to facilitate the removal operation of the laryngeal mask, it has been proposed to make a slit on a lower region of the tube, extending parallel to the longitudinal direction of the tube. If such a slot facilitates the sliding of the probe into the main hole, it increases the risk of an orientation of the intubation probe in the wrong hole, as well as the scraping of the probe on the walls of the patient's airways. . In addition, the risk of tearing of the intubation probe is still present. These disadvantages are all the more crucial as the placement of an intubation probe is usually performed at a critical time, such as the management of a patient in emergency response. In view of the above, the invention aims to provide an intubation device to allow artificial respiration by means of an intubation probe overcoming the aforementioned drawbacks.

More particularly, the invention aims to allow the introduction of an intubation probe by means of a laryngeal device with a slot by limiting the risk of orienting the probe in the digestive tract, while avoiding the insertion an invasive device in the airways for too long a period and minimizing the risk of damaging the walls of the airways.

For this purpose, there is provided a laryngeal device comprising a tube having a proximal end and a distal end, the tube delimiting a main hole extending in the longitudinal direction of the tube between the proximal end and the end. distal, and a laryngeal bead forming substantially an ellipse around an opening in the longitudinal extension of the main hole, the laryngeal bead being connected to the tube by its distal end, said device further comprising a slot extending over the tube and or on the laryngeal bead.

According to one of its general characteristics, the tube comprises a first secondary hole extending between the proximal end and the distal end and intended to receive a means of acquisition and transmission of an optical signal, the laryngeal device comprising a screen for displaying an image constructed from said optical signal.

Such a laryngeal device makes it possible to limit the risk of introducing the intubation probe into the digestive tract when such a probe is placed on the site by means of a laryngeal device comprising a slit. This results in an easier removal operation of the laryngeal device once the intubation probe is in place, while limiting the risk of aspiration of gastric contents and avoiding the scraping of the walls of the patient's airways.

According to an advantageous embodiment, the laryngeal bead is connected to the tube by its distal end so that each end of small diameter of the bead is located in the longitudinal extension of a lateral region of the tube, said slot extending at least partially on one of the lateral regions of the tube.

In this way, it is no longer necessary to disconnect the intubation probe from an artificial respiration unit, so that ventilation of the patient can be implemented more quickly. The sliding of the tube around the intubation probe is made easier. In addition, the presence of the slit on a lateral region allows stabilization of the laryngeal device and easier work for the operator who can handle the probe and the laryngeal device with each of his hands respectively.

According to an advantageous embodiment, the tube admits a curvature in the plane perpendicular to the direction of the small diameter of the laryngeal bead, said slot extending at least partially in the lateral region located to the left relatively to the tube, when examines a longitudinal section of said tube from the proximal end towards the distal end and a region outside the curvature of the tube is located at the top relatively to the tube.

With such a curvature and such a choice of a lateral region, the slit is located on the right lateral side of the patient during use of the laryngeal device by an operator on a patient. Since the operator is normally placed behind the elongated patient 's head, the slot is located at his right hand. The manipulation of the device is then facilitated for a right-handed operator and brought into compliance with the standards generally in force in most countries.

According to another embodiment, the longitudinal section of the slot extends within an angular sector, around the longitudinal direction of the tube, away from said lateral region as the distance between said longitudinal section and the distal end of the tube is weak.

As a result, when the device is placed in the airways of a patient, the slit is located on the side of the tube at the proximal end. At the mouth, the intubation probe exiting through the slot exits the tube at the level of the commissure of the lips instead of exiting at the incisors of the upper or lower dental arch of the patient. This results in an easier and more secure intubation probe output. In addition, in the vicinity of the distal end, the slot is at a region facing the trachea. As a result, during the introduction of the intubation probe into the airways and trachea, a gap of the slot to limit the scraping against the anterior wall of the trachea. The insertion is therefore much easier, faster, and less traumatic to see atraumatic.

Advantageously, the section of the tube relative to the longitudinal direction is substantially oval, the two lateral regions of the tube containing the two ends of large diameter of the oval section of the tube.

Such a section of the tube allows easier and more stable insertion of the device through the patient's mouth.

Advantageously, the screen is attached to the tube so as to allow adjustment of its orientation relative to the longitudinal direction of the tube.

Preferably, the screen has a tube attachment portion and a portion opposite the attachment portion, the opposite portion having a smaller thickness than the attachment portion.

With such a configuration, the screen can be as thin as possible on its upper part so as not to abut against the thorax of the patient at the beginning of the insertion of the laryngeal device.

According to another embodiment, the main hole comprises guide means adapted to guide a probe intubation between vocal cords of a patient.

In another embodiment, the tube includes at least one second secondary bore extending in the longitudinal direction between the proximal end and the distal end and forming a channel for passage of carbon dioxide and / or oxygen. or a gastric suction canal.

According to another embodiment, the tube further comprises a lug intended to come into contact with an epiglottis of a patient when the laryngeal device is inserted into the patient's airways.

Other objects, features and advantages of the invention will appear on reading the following description, given solely by way of nonlimiting example, and with reference to the appended drawings in which:

- Figure 1 is a top view of a laryngeal device according to an embodiment of the invention,

FIG. 2 is a sectional view of the laryngeal device of FIG. 1;

FIG. 3 is a view in longitudinal section of the device of FIGS. 1 and 2,

FIG. 4 is a broken sectional view of the device of FIGS. 1 to 3,

FIG. 5 is a front view of a screen adapted to be incorporated in the device of FIGS. 1 to 4,

FIG. 6 is a side view of the screen of FIG. 5, and

FIG. 7 is a detailed view of a slot of a device according to a variant of the embodiment of FIGS. 1 to 4.

Referring to Figures 1 and 2, there is shown a laryngeal device 2 according to an embodiment of the invention. In the illustrated embodiment, the device 2 is preferably integrally or partially made of a flexible material such as flexible plastic. An orthonormal vector base 4 attached to the device 2 is defined. The base 4 consists of a vector x, a vector y and a vector z. The device 2 is intended to be placed in the respiratory tract of a patient, that is to say, introduced into the patient's airways through the mouth. When the device 2 is put in place, the vector z is oriented in a longitudinal direction and upwards, relative to the patient. The vector x is then oriented in a forward direction forward relative to the patient. The vector is oriented in a transverse direction, from right to left, relative to the patient. Throughout this application, the terms "downward", "upward", "lower" and "higher" will be understood to refer relatively to device 2 when it is in place; i.e. assuming the vector z directed parallel to the spine and oriented from the feet to the patient's head. Similarly, the terms "left" and "right" will be understood by assuming the vector y directed parallel to a straight line connecting the patient 's shoulders and oriented from the right shoulder to the patient' s left shoulder.

The device 2 comprises a tube 6. The tube 6 has a curved shape in the plane perpendicular to the vector y. More particularly, the tube 6 is delimited by an upper external region 8 and a lower internal region 10, the outer region 8 being convex and the inner region 1 0 being concave.

The tube 6 extends along a guideline 12. The guideline 12 is strictly convex and located in a plane directed by the vectors x and z (see Figure 2). The tube 6 has a plane of symmetry directed by the vectors and z, the line 12 being located in said plane of symmetry.

The tube 6 has a proximal end 14 and a distal end 16. The distal end 1 6 is intended to be inserted inside the patient's airways, the proximal end 1 4 then remaining outside.

The tube 6 has a left lateral region 18 and a right lateral region 20. The left and right lateral regions 20 are respectively intended to be located on the left and right lateral sides of the patient, when the laryngeal device 2 is used to to be placed . The lateral regions 1 8 and 20 are situated at the same distance from the lower 8 and upper 10 regions. In this way, the lateral regions 1 8 and 20 extend around a line corresponding to the projection of the line 12, according to the direction of the vector y, on the wall of the tube 6.

As can be seen in FIG. 2, the tube 6 comprises a main hole 22 extending inside the tube 6 between the ends 14 and 16. More particularly, the main hole 22 extends around the guideline 12. The diameter of the longitudinal section of the main hole 22, at any point of the guideline 12, is greater than the diameter of a probe. standard intubation. In this way, it is possible to slide an intubation probe (not shown) within the hole 22 between the ends 14 and 16.

FIGS. 3 and 4 represent two different views in longitudinal section of the tube 6 and the main hole 22 taken respectively at two distinct points of the guideline 12. More particularly, the sectional view of FIG. 3 is taken at a point in the line 12 near the end 14. The sectional view of Figure 4 is taken at a point of the line 12 near the end 1 6.

As can be seen in FIG. 3, the tube 6 and the main hole 22 have an oval shape whose large diameter extends in the direction of the vector y. In other words, near the end 14, the distance between the regions 1 8 and 20 is greater than the distance between the regions 1 0 and 8.

This oval section of the tube 6 and the main hole 22 facilitate the insertion of the device 2 in the patient's mouth in particular because the side regions 1 8 and 20 are placed respectively near the left and right commissures of the lips of the patient's mouth. .

As can be seen in Figure 4, the section of the tube 6 and the main hole 22 near the distal end 16 is substantially circular in shape around the point of intersection with the line 12. In other words, the regions 8, 10, 18 and 20 are all located at the same length of the line 12.

The tube 6 has a recess zone 24 extending outwardly relative to the tube 6, near the proximal end 14. The zone 24 is adapted to cooperate with the fingers of an operator so as to allow a better grip of the device 2 by the operator, especially during its introduction and its removal after the introduction of an intubation probe. In the illustrated example, the recess area 24 has a plurality of ridges. Alternatively or in addition to the recess area 24, the tube 6 may include a handle (not shown) oriented to facilitate insertion of the tube 6 into the patient's airway.

As can be seen in FIGS. 2 and 4, the tube 6 further comprises a guiding means 26. The guiding means 26 comprises two protuberances 28 which extend from the tube 10 towards the line 12 and inside the hole 22. The protuberances 28 extend respectively to the left and right of a central space (not referenced). By its position at the outer region 8 of the tube 6, the central space is adapted to be located in the longitudinal extension of a space between the vocal cords of the patient when the device 2 is put in place. The protuberances 28 and the central space thus constitute a ramp for guiding an intubation probe (not shown) through the vocal cords of the patient.

The device 2 comprises a laryngeal bead 29. The bead 29 constitutes the part of the mask 2 coming into contact with the epiglottis and the larynx of the patient. The bead 29 has the same plane of symmetry directed by the vectors x and z as the tube 6.

The bead 29 comprises a flat plate 30 fixed to the tube 6 by the end 16. The plate 30 is oriented in an oblique plane with respect to the tangent to the direction of the line 12 at the distal end 16.

The bead 29 defines an oval-shaped opening 3 1 extending around the line 12. In this way, the opening 30 extends in the longitudinal extension of the main hole 22. Like the tube 6, the plate 29 comprises a upper region 32, a lower region 34, a left lateral region 36 and a right lateral region 38. The regions 32, 34, 36 and 38 of the bead 29 extend respectively in the longitudinal extension of regions 8, 10, 18 and 20 of the tube 6.

The bead 29 has a flexible part 40 fixed to the face of the plate 30 opposite the tube 6. The flexible part forms a support slack for abutting contact with the patient 's larynx and epiglottis. The portion 40 also ensures the seal between the opening 3 1 and the digestive tract of the patient. Although, in the illustrated example, a flexible portion is used to perform these functions of abutment and sealing, it is of course within the scope of the invention to consider using a laryngeal bead with a portion inflatable, for example by means of a hose and an inflation means located at the end 14.

As can be seen in FIG. 2, the portion 40 has an epiglottum support pin 42 situated at the region 34 of the plate 30. The function of the pin 42 is to cooperate with the epiglottis of the patient when the device 2 is put in place to prevent the epiglottis from bending and obstructing the airways.

Referring to Figures 3 and 4, the tube 6 has three secondary holes 44, 46 and 48. The holes 44, 46 and 48 extend between the ends 14 and 1 6. More particularly, the secondary holes 44, 46 and 48 are located between the lower region 10 and the main hole 42 of the tube 6. The hole 44 is intended to allow the supply of oxygen to the respiratory tract of the patient. The secondary hole 46 allows the evacuation of expired carbon dioxide by the patient. By means of the hole 46, it is possible to implement a capnography of the patient. The secondary hole 48 constitutes a gastric suction channel allowing the evacuation of substances regurgitated by the patient. By means of the secondary holes 44, 46 and 48, the control of the intubation by the operator is facilitated and the risk of the appearance of esophageal intubation is further reduced. Although, in the illustrated example, the three secondary holes 44, 46 and 48 are represented in the same region around the region 10, it is within the scope of the invention to envisage a different arrangement of the secondary holes 44, 46. In particular, it is possible to envisage secondary holes 44 and 46 in the same region around region 8, which have the advantage of being more opposite to the trachea of the patient, when the device 2 is normally put in place. square. As can be seen in FIGS. 3 and 4, the device 2 comprises a slot 50 extending on the tube 6 and on the bead 29. More particularly, the slot 50 extends on the tube 6 between the ends 14 and 16 The slot 50 extends beyond the end 1 6 on the plate 30 and the flexible region 40 of the bead 29.

In this embodiment, the slot 50 is of substantially linear shape and of substantially constant thickness throughout its length between the ends 14 and 16 as well as over its entire length on the bead 29.

In the vicinity of the end 14, the slot 50 extends in the left lateral region 1 8 of the tube 6, as shown in FIG.

On a first longitudinal half-portion located on the side of the end 14, the slot 50 remains located in the lateral region 1 8. On a second half-longitudinal portion located on the end side 16, the slot 50 is between regions 18 and 10. More particularly, the slot 50 progressively leaves the region 18 and gradually approaches the region 10 as one approaches the distal end 16. The slot then has substantially a straight shape on the first half-portion then a sigmoid shape on the second half-portion. Whatever is a point of the sigmoid, the tangent to the sigmoid at this point has an angle β with the line parallel to the corresponding tangent of the line 12 passing through said point. In the illustrated example, the angle β varies between 0 ° and a value P max of between 30 ° and 45 °.

More particularly, regardless of a longitudinal section of the tube 6 at a point of the line 12, the position of the slot 50 is such that the radial line connecting said point of the line 12 to the slot 50 forms an angle with the direction Δ of the vector y, the angle a being less than 3 ° on the first half-portion, and then gradually increasing on the second half-portion, as one moves away from the end 14 and that one approaching the end 16. Likewise, the position of the slot 50 on the bead 29 is such that the rectilinear direction of the slot 50 intersects the guideline 12 and forms an angle α ₂ 9 with the direction Δ, the angle ₂ being between 0 ° and 1 80 °. To further facilitate the insertion of an intubation probe, as will be detailed subsequently, however, it is preferable an angle ₂ between 75 ° and 90 °. The value of the angle α converges to ₂ as the longitudinal section is taken at a point near the end 1 6. The slot extends beyond the distal end 1 6 in a rectilinear direction in the extension of the slot 50 on the tube 6 at the distal end 1 6.

With reference to FIG. 2, the tube 6 has a protuberance 52. The protuberance 52 is located at the end 14 and extends from the region 10 perpendicular to the plane tangential to the region 10 at the end. 14. The protuberance 52 comprises a hole 54 forming a socket designed to cooperate with a socket 56 of a screen device 58 (see Figure 5).

The laryngeal device 2 comprises an indicator 69 of the loading limit of a tube. The indicator 69 has the shape of a notch on the tube 6 projecting outwardly close to the end 16. However, it is possible, without departing from the invention, to envisage an indicator made by means of an ink. The indicator 69 indicates a position which must not be exceeded by an intubation probe loaded in the hole 22 prior to the setting up of the device 2. Because the indicator 69 is close to the end 16, it prevents the end of the probe from passing over the bead 29, which may attack or scrape the wall of the patient 's trachea when the device 2 is put in place.

The screen device 58 includes a screen block 60 which can be fixed to the protuberance 52 of the tube 6 removably. The blo c 60 contains a video screen (not shown) of rectangular shape in landscape orientation. However, it is of course within the scope of the invention to consider a screen having a different orientation, such a portrait orientation, or a different shape, including square or circular.

The screen block 60 is removably attached to the protrusion 52 by clipping the socket 56 to the socket. Other fixing means may be provided, such as for example permanent magnets mounted on the socket 56 and / or on the socket formed by the hole 54.

As can be seen in FIG. 6, the screen block 60 comprises a lower portion 62 of greater thickness than an upper portion 64. In addition, the screen block 60 has a connection socket 66 with a cable (not shown) connected to another remote screen (not shown) of a computer or a smart mobile terminal. Although, in the example illustrated, the connection is implemented by means of a cable, it is of course conceivable without departing from the scope of the invention a wireless connection, for example a "wifi" type connection and / or "bluetooth".

The fact of using a plug on the screen block 60 cooperating with a socket on the laryngeal device 2 makes it easier to maintain the equipment. Indeed, a plug is easier to maintain, the screen block 60 being intended to be used more than the laryngeal device 2, which is in principle replaced for each patient. Of course, the invention is not limited to the exemplary embodiment illustrated, so that it is possible to invert the arrangement of the male and female plugs, by providing a socket on the blo c screen 60 and a socket maie on the laryngeal device 2.

In the illustrated example, the screen supported by block 60 is a high-definition color screen. In addition, the screen is powered by non-rechargeable batteries located inside a housing (not shown) provided in the blo c 60. However, without departing from the scope of the invention consider another type of screen or other type of power source, such as rechargeable batteries or rechargeable batteries. In this case, the power source can be recharged by means of a suitable charging base comprising a socket cooperating with the plug 56. Alternatively, the power source can be recharged by means of a cable connection directly connected to the mains. As can be seen in FIGS. 3 and 4, the tube 6 comprises a fourth secondary hole 68 extending between the ends 14 and 16. The hole 68 is similar to the holes 44, 46 and 48. The hole 68 receives an optical fiber (not shown) extending from the end 1 6 to the protuberance 52 at the end 14. The secondary hole 68 also receives a wire (not shown) extending from the end 1 6 until the protuberance 52. At the end 16, the electric wire (not shown) is connected to a light emitting diode (not shown) of white color. An anti-fog lens (not shown) is disposed at the end 16 in the extension of the secondary hole 68 and the optical fiber.

The socket 56 and / or the socket is adapted to be able to connect the optical fiber (not shown) to the screen contained in the block 60. Moreover, the socket maie 56 is adapted to be able to connect the electric wire (no shown) to a power source, such as the non-rechargeable batteries of the screen blotter 60.

In this way, it is possible to display on the screen an image detected and transmitted by the optical fiber of the secondary hole 68 representing the airways at the end 16. More particularly, the screen represents the position of the larynx , The epiglottis and the vocal cords of the patient relative to the bead 29. The screen 60 also represents the various steps of insertion of an intubation probe (not shown) into the patient's airways. The image displayed is of a particular quality thanks to the use of a white light-emitting diode and an anti-fog lens.

Although an optical fiber is used in the exemplary embodiment illustrated, it is of course within the scope of the invention to consider any other means of detection and transmission of an image. For example, it is possible to use a system consisting of a plurality of lenses and / or mirrors making it possible to detect an image at the end 1 6 and to transmit this image to the end 14. In such a case , the presence of a screen is not necessary, the operator being able to visualize the image while watching directly the mirror or the lens located (the) closest to the end 14.

Thus, the laryngeal device 2 can be used to set up an intubation probe (not shown) in the respiratory tract of a patient. To do this, the laryngeal device 2 is previously provided with an intubation probe such as those commonly used commercially inserted in the hole 52 over the entire first half-portion of the tube 6 and the second half-portion until An advantage of the invention is that it is not limited to a specific intubation probe, but applies to all types of endotracheal intubation probes.

For the operation of setting device 2 and the intubation probe, an operator is placed behind the head of the patient lying down. Most of the time, the top of the patient 's skull almost comes into abutment against the operator' s stomach, the patient resting on a table or on the floor.

The operator first connects the connector (not shown) of the intubation probe to a suitable outlet of an artificial respiration unit. At the same time, the operator connects the secondary holes 44, 46 and 48 to the outlets adapted to implement a supply of oxygen, a sampling of expired carbon dioxide and suction of gastric fluids discharged by the patient. Then, the operator sets up the device 2 in the patient's airways. When this is done, the portion 40 of the bead 29 abuts the opening of the esophagus and leans against the larynx of the patient. From this moment, it is possible to implement an artificial respiration, the losses of oxygen being compensated, the time of intubation, by the contribution implemented by means of the secondary hole 44.

The operator then slides the intubation probe inside the main hole 22 until it is placed in the airways of the patient, that is, until the end of the probe opposite the connector exceeds the bead 29 by a few centimeters and is in the trachea of the patient. The operator stops the sliding of the probe in the hole 22 when the probe is correctly put in place.

While holding the probe with his right hand, the operator retrieves the device 2 by pulling it one with his left hand to the outside of the patient's airways. The slot 50 then deviates and gradually lets the probe out of the hole 22 and the opening 3 1. The extraction of the device 2 then occurs particularly easily for the operator and ino ffensive for the patient, while limiting the risk of tearing of the airway intubation probe of the patient.

Of course, the invention is not limited to the method described above. In particular, the operator can without departing from the scope of the invention perform only the connection of the connector of the intubation probe, without using the secondary holes 44, 46 and 48.

Moreover, during the insertion of the probe into the trachea, the slot 50 opens at the distal end 1 6 and the laryngeal bead 29. This results in less rigidity and a more pronounced curvature of the probe, which limits aggression and scraping of the walls of the patient's trachea. In addition, the slit 50 of sigmoid shape approaching the lower portion 10 near the end 1 6 avoids damage to the right vocal cord and / or the cartilaginous structures and / or tissues of the patient. In other words, it is possible to insert the intubation probe in an oblique direction from the right lateral side to the left lateral side of the patient so that the tip of the bevel of the intubation probe is centered during its passage. between the vocal cords, avoiding bumping against the tissues and vocal cords adjacent to the right vocal cord.

The tube 6 may also include lateral fasteners (not shown) allowing its attachment relative to the head and the mouth of the patient, once the laryngeal device 2 set up. Such fasteners facilitate the work of the operator and in particular the correct insertion of an intubation probe.

The use of a screen allows the operator to continuously monitor the position of the laryngeal device 2 and the probe. The screen being removable, it is possible to reuse the same screen blank several times with laryngeal masks and replaced probes for each patient. Preferably, the inclination of the screen 60 is adjustable for a better user comfort.

To facilitate the loading or unloading of the probe, the slot 50 may comprise an opening (not shown) located near the end 14 having a thickness wider than the average thickness of the slot 50. The insertion of the Intubation probe in the main hole 22 can thus alternatively be inserted along the longitudinal direction 12 directly into the main hole 22, or by oblique insertion through the opening of a wider thickness than the average thickness of the slot 50.

Referring to Figure 7, there is shown cutaway a variant of the embodiment detailed above. The identical elements bear the same references. In this variant, the tube 6 of the laryngeal device comprises a slot 70 of variable thickness. More particularly, the slot 70 is delimited on one side by a straight line 72 and on the other by a crenellated line 74. In other words, the slot 70 comprises a plurality of tabs narrowing locally in the direction of the width the slot 70.

The slot 70 makes it possible to avoid an exit of the intubation probe with respect to the main hole 22 as long as the said probe is not yet correctly put in place, the output of the said probe through the slot 70 being facilitated, however, when the operator extracts the device 2 from the patient's airways.

In this variant, the laryngeal device is partially made of hard plastic and partially of flexible plastic. More particularly, the majority of the device is made of hard plastic, only the tabs formed by the slot 70 and in particular the crenellated line 74 being made of soft plastic.

Claims

A laryngeal device (2) comprising a tube (6) having a proximal end (14) and a distal end (16), the tube (6) defining a main hole (22) extending in the direction longitudinal (12) of the tube (6) between the proximal end (14) and the distal end (16), and a laryngeal bead (29) forming substantially an ellipse around an opening (31) located in the longitudinal extension (12) of the main hole (22), the laryngeal bead (29) being connected to the tube (6) by its distal end (16), said device (2) further comprising a slot (50) extending over the tube (6) and / or on the laryngeal bead (29), characterized in that the tube (6) has a first secondary hole (68) extending between the proximal end (14) and the distal end (16) and for receiving a means for acquiring and transmitting an optical signal, the laryngeal device (2) comprising a display screen (60) of an image constructed e from said optical signal.

A laryngeal device (2) according to claim 1, wherein the laryngeal bead (29) is connected to the tube (6) by its distal end (16) so that each small bead diameter end (36, 38) ( 29) is located in the longitudinal extension (12) of a lateral region (18, 20) of the tube (6), said slot (50) extending at least partially on one of the lateral regions (18, 20) of the tube (6).

A laryngeal device (2) according to claim 2, wherein the tube (6) has a curvature in the plane perpendicular to the direction (y) of the small diameter of the laryngeal bead (29), said slot (50) extending at least partially in the lateral region (18) on the left relatively to the tube (6), when a longitudinal section of said tube (6) is viewed from the proximal end (14) and towards the distal end (16) and an outer region (8) outside the curvature of the tube (6) is oriented upward relative to the tube (6).

The laryngeal device (2) according to claim 2 or 3, wherein the longitudinal section of the slot (50) extends within an angular sector, about the longitudinal direction (12) of the tube, away from said lateral region (18) as the distance between said longitudinal section and the distal end (16) of the tube (6) is small.

A laryngeal device (2) according to any one of claims 1 to 4, wherein the section of the tube (6) with respect to the longitudinal direction is substantially oval, the two lateral regions (1 8, 20) of the tube ( 6) containing both ends of large diameter of the oval section of the tube (6).

The laryngeal device (2) according to any one of claims 1 to 5, wherein the screen (60) is attached to the tube (6) so as to allow adjustment of its orientation relative to the longitudinal direction (12). ) of the tube (6).

The laryngeal device (2) according to any one of claims 1 to 6, wherein a lens with an anti-fog coating is received in the first secondary hole (68).

A laryngeal device (2) according to any one of claims 1 to 7, wherein the screen (60) has an attachment portion (62) to the tube (6) and an opposing portion (64) to the portion of fastener (62), the opposite portion (64) having a smaller thickness than the attachment portion (62).

The laryngeal device (2) according to any one of claims 1 to 8, wherein the main hole (22) comprises guide means (26) adapted to guide an intubation probe between a patient 's vocal cords. .

The laryngeal device (2) according to any one of claims 1 to 9, wherein the tube (6) comprises at least a second secondary hole (44, 46, 48) extending in the longitudinal direction (12) between the proximal end (14) and the distal end (16) and forming a channel for passage of carbon dioxide and / or oxygen or a gastric suction channel.