CN110292689B

CN110292689B - Laryngeal mask

Info

Publication number: CN110292689B
Application number: CN201910106682.7A
Authority: CN
Inventors: 唐米杰; 刘忠辉
Original assignee: Changsha Maggil Medical Technology Co ltd
Current assignee: Changsha Maggil Medical Technology Co ltd
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2021-07-30
Anticipated expiration: 2039-02-02
Also published as: CN110292689A

Abstract

The embodiment of the application provides a laryngeal mask, which comprises a laryngeal mask main body and an image device, wherein the laryngeal mask main body comprises a catheter and a sealing seat connected to the far end of the catheter; the far end of visual image chamber way is formed with the first blind end portion that forms by the printing opacity material is sealed, but insert with inserting of visual image pipe in the visual image chamber way, the far end of visual image chamber way and the far end of visual image pipe stretches into in the seal receptacle, the far end of visual image pipe can be crooked and reset. In the embodiment of the application, the image tube is sealed in the image cavity, so that the image tube can not be contacted with the internal tissue of a patient in the using process, and the image tube can be relatively safely reused; the control of the upward bending of the distal end of the image tube can poke the drooping epiglottis and can also bypass the epiglottis to obtain a good visual field.

Description

Laryngeal mask

Technical Field

The application relates to the technical field of medical equipment, in particular to a laryngeal mask.

Background

The laryngeal mask as an supraglottic ventilation device belongs to an artificial respiratory tract, and is widely applied to clinic due to the advantages of simple and convenient operation, high success rate, small injury and the like after being invented in 1983. A laryngeal mask is an artificial airway device between a face mask and a tracheal cannula that allows a patient to maintain spontaneous breathing and also allows positive pressure ventilation.

The laryngeal mask without the visualization function is generally inserted into the body of a patient in a blind way, and because the details of the throat cannot be peeped during operation, an operator can only insert the laryngeal mask in a blind way by hand feeling and experience. Blind insertion may cause inaccurate placement of the laryngeal mask, and inaccurate placement may cause a series of subsequent problems, such as failure to effectively isolate respiratory tract and digestive tract, resulting in incomplete sealing of the laryngeal mask, gas leakage, flatulence, reflux, and even aspiration of the patient; inaccuracies in position also increase the likelihood of intraoperative laryngeal mask movement. In addition, blind insertion can increase the probability of selecting an improper laryngeal mask. When one or more of the above problems occur, the operator has to readjust the angle of the laryngeal mask or insert it many times over and over again, which may extend the operation time and delay the rescue of the critically ill patient. And the oral mucus of the patient can be increased due to the trial insertion for many times, and the operation difficulty is increased accordingly. In addition, repeated operation easily causes pharyngeal cavity injury bleeding of patients, great cardiovascular reaction, increased operation risk and the like.

In order to ensure the accuracy of the laryngeal mask placement position, an operator usually checks through various indirect means, such as observing the fluctuation of the chest, the lung compliance, auscultation whether air leakage exists or not, observing the neck bulge, monitoring PetCO2 (end-tidal carbon dioxide partial pressure), mouth opening observation and the like. There are some problems with using the soft visual lens directly. Firstly, the visual soft lens is a reusable instrument and directly contacts with the internal tissue of a patient, so strict disinfection is required, a certain time is required for the strict disinfection, the operation flow of the disinfection is relatively more, the disinfection cost is relatively increased, the requirement on the anti-soaking performance of the image tube is also high, moreover, during the disinfection, medical staff has to prepare a spare instrument, the use cost is objectively increased, and even if so, a certain cross infection risk exists; secondly, the cost of the visual soft lens is relatively high, and the visual soft lens does not belong to a standby instrument which can be obtained randomly, for example, the visual soft lens is possibly lacked in some emergency airway treatment or part of basic medical institutions; third, the visual soft lens is mainly used for examination after the laryngeal mask is inserted or guiding the tracheal cannula to enter the glottis through the laryngeal mask, but the whole visual process is not realized in the laryngeal mask placing process, so that the repeated insertion of the laryngeal mask is difficult to effectively reduce.

In view of this, there is a need to achieve the visual function of the laryngeal mask itself, and a range of video laryngeal mask designs have emerged.

In the utility model patent with publication number CN205814822U entitled "visual intubation laryngeal mask", the image sensor is arranged in the laryngeal mask trachea, the cable and the like are arranged along the inner wall of the laryngeal mask trachea, the outlet of the image sensor is parallel and level with the outlet of the far end of the trachea, and the near end of the cable is provided with a port which can be connected with a display screen and a power supply. The design ensures that the image sensor can only be fixedly embedded into the laryngeal mask in advance, so that the image sensor, the cable and other parts are difficult to take out and use for other laryngeal masks, and the application cost of the laryngeal mask is high; moreover, when the epiglottis of the human body sags, the image sensor may be blocked by the epiglottis, resulting in failure to acquire a complete glottic image or a complete failure to acquire a glottic image.

In the patent of invention with publication number CN1859939B entitled "laryngeal mask airway device with fiber optic assembly", the glottis and images in the laryngeal mask are transmitted to the external display through the optical fiber bundle, the operator can perform visual intubation operation, the optical fiber bundle is embedded in the laryngeal mask sealing seat in advance, the outlet position is fixed and unadjustable, when the epiglottis of the human body drops, the outlet of the optical fiber bundle can be blocked, and the glottis images can not be displayed; because the outlet position is fixed and nonadjustable, the range of the glottis and the peripheral area observed by the optical fiber bundle is relatively small, the influence of the number of the optical fiber bundles is large, and in addition, the optical fiber bundle cannot be taken out, so the application cost is relatively high.

In the patent publication CN105050481B entitled "laryngeal mask with retractable rigid tongue and means for ventilation and intubation," the intubation laryngeal mask is coupled to a "J" shaped rigid element while a vision device is inserted through a dedicated lumen near the outlet of the laryngeal mask airway. Before the laryngeal mask is placed, the J-shaped rigid element is coupled with the laryngeal mask, after the laryngeal mask is placed, when the laryngeal mask is inserted, if the glottis is invisible, the rigid element can be used for adjusting the whole laryngeal mask or lifting the epiglottis upwards and downwards, so that an unobstructed view field is provided for the visual device, and after the intubation is successful, the rigid element is taken out. The design has coupling and decoupling operations of the rigid element and the laryngeal mask, and the operation is relatively complicated and time-consuming; after the rigid element and the laryngeal mask are integrated into a whole, the cross section is relatively large (namely the transverse size is large), the rigidity is increased, and the requirement on the opening degree of a patient is high; manipulating the drooping epiglottis while intubating also presents a risk of injury to the laryngeal tissues.

Disclosure of Invention

In view of the above, it is desirable to provide a laryngeal mask that enables a relatively safe and reusable viewing device and has a good field of view.

In order to achieve the above object, an embodiment of the present application provides a laryngeal mask, including a laryngeal mask main body and an image device, where the laryngeal mask main body includes a catheter and a seal holder connected to a distal end of the catheter, the image device includes a control portion and an image tube connected to the control portion, an image sensor is disposed at a distal end of the image tube, and an air guide channel and an image lumen are formed in the laryngeal mask main body; the far end of the visual cavity channel is provided with a first transparent blind end, the visual tube can be inserted into the visual cavity channel in an inserting and pulling manner, the far end of the visual cavity channel and the far end of the visual tube extend into the sealing seat, and the far end of the visual tube can be bent and reset under the control of the control part.

Further, the end face of the first blind end is formed into a plane or an outwardly convex arc face.

Furthermore, the material of the first blind end is polycarbonate or polymethyl methacrylate.

Further, a first accommodating chamber for accommodating a part of the image tube is formed in the conduit; the laryngeal mask main body comprises a sealing part and a first hose at least partially extending into the sealing seat, the sealing part isolates the first accommodating chamber from the space in the sealing seat, and a first through hole is formed in the sealing part; the far end of the first hose is formed into the first blind end part, the near end of the first hose is hermetically connected with the periphery of the first through hole of the sealing part, the video tube is arranged in the first accommodating chamber and the first hose in a penetrating mode, and the far end of the video tube is located in the first hose.

Furthermore, the first hose comprises a first corrugated section and first ribs extending along the length direction of the first corrugated section, the inner wall of the first corrugated section is of a smooth structure, and the thickness of the first ribs is larger than the thickness corresponding to the wave troughs of the first corrugated section.

Further, first hose includes the open hose body in both ends and connect in the window portion of hose body distal end, window portion light transmission performance is higher than the light transmission performance of hose body, the window portion forms first blind end portion.

Furthermore, a step departing from the window part is formed on the inner wall of the hose body, an abutting structure is formed at the near end of the window part, the abutting structure extends into the hose body and abuts against the step, and the part of the window part extending into the hose body is bonded with the hose body; or the window part cover is arranged on the outer side of the far end of the hose body.

Further, the laryngeal mask body comprises a light guide member extending along the length direction of the image tube, and the far end portion of the light guide member and the first blind end portion are arranged in a mutually-separated mode.

Further, a light guide cavity channel is formed in the laryngeal mask body, the light guide piece is arranged in the light guide cavity channel in advance, a light-transmitting second blind end portion is formed at the far end of the light guide cavity channel, the far end of the light guide cavity channel and the far end of the light guide piece are both located in the sealing seat, and the first blind end portion and the second blind end portion are arranged in a mutually-separated mode.

Further, a second accommodating chamber for accommodating a part of the light guide member is formed in the conduit, the laryngeal mask body comprises a second hose at least partially positioned in the sealing seat, and a second through hole is formed in the sealing part; the far end of the second hose forms the second blind end, the near end of the second hose is hermetically connected with the periphery of the second through hole, the light guide piece penetrates through the second accommodating chamber and the second hose, and the far end of the light guide piece is located in the second hose.

Furthermore, the first hose comprises a first corrugated section and first ribs extending along the length direction of the first corrugated section, the inner wall of the first corrugated section is of a smooth structure, and the thickness of the first ribs is greater than the corresponding thickness of the troughs of the first corrugated section;

the second hose comprises a second corrugated section and second ribs extending along the length direction of the second corrugated section, the inner wall of the second corrugated section is of a smooth structure, and the thickness of the second ribs is greater than that of the corresponding troughs of the second corrugated section.

Further, the neutral layer of the first hose and the neutral layer of the second hose are located in the same neutral layer plane, and the first ribs and the second ribs are located in the neutral layer plane.

Further, the far end of the light guide piece is exposed in the sealing seat, and the far end of the light guide piece is bonded with the first hose.

Further, the far end of the video tube can drive the light guide piece to be synchronously bent and reset.

Further, the far end of the light guide piece is fixedly connected with the sealing seat.

Further, from the near end to the far end direction of the video tube, the video tube sequentially comprises a main body section, a snake bone section and a video section, the far end of the video section is provided with the image sensor, at least part of the snake bone section is positioned in the sealing seat, and the far end of the video tube is bent and reset through the snake bone section.

Further, the control part includes first steel wire, second steel wire and power component, first steel wire with the second steel wire is worn to locate in the video tube, the near-end of first steel wire and the near-end of second steel wire respectively with the power component drive is connected, the distal end of first steel wire with the inboard top of snake bone section distal end is connected, the distal end of second steel wire with the inboard bottom of snake bone section distal end is connected, first steel wire and the second steel wire is in drive under power component's the drive snake bone section kickup and reset.

In the embodiment of the application, the image tube is sealed in the image cavity, so that the image tube can not be contacted with the internal tissue of a patient in the using process, and the image tube can be relatively safely reused; the control of the upward bending of the distal end of the image tube can poke the drooping epiglottis and can also bypass the epiglottis to obtain a good visual field.

Drawings

FIG. 1 is a simplified schematic diagram of a video tube and a transparent window in the related art;

figure 2 is a schematic diagram of the structure of a laryngeal mask in accordance with an embodiment of the present application;

figure 3 is a schematic structural view of a laryngeal mask body in accordance with an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a video apparatus according to an embodiment of the present application;

FIG. 5 is a schematic view of a portion of the video unit shown in FIG. 4, wherein the display is omitted;

FIG. 6 is a schematic view of the power assembly of the present application in cooperation with the snake bone segment and the vision segment;

figure 7 is a first schematic view of a laryngeal mask in accordance with an embodiment of the present application, in place in a human body, with the epiglottis not drooped, and with the distal end of the viewing tube passing around the tip of the epiglottis and unbent;

figure 8 is a second schematic view of the laryngeal mask of the embodiment of the present application positioned in a human body with the epiglottis not drooping and with the distal end of the viewing tube passing around the tip of the epiglottis and curving upward;

figure 9 is a third schematic view of a laryngeal mask in accordance with an embodiment of the present application, in place in a human body, in which the epiglottis is drooped and the distal end of the viewing tube passes around the tip of the epiglottis and is unbent;

figure 10 is a fourth schematic view of the laryngeal mask of the embodiment of the present application positioned in a human body with the epiglottis sagged and the distal end of the viewing tube curved upward to pluck the epiglottis;

FIG. 11 is a schematic cross-sectional view taken along the line E-E in FIG. 2;

FIG. 12 is a schematic sectional view taken along the direction F-F in FIG. 2;

figure 13 is a cross-sectional view of the laryngeal mask shown in figure 2 (with the display omitted) in which the cross-sectional section passes through the light guide;

FIG. 14 is a schematic view of a mating arrangement of a conduit, transition joint, and seal according to an embodiment of the present application;

FIG. 15 is a schematic view of the first hose, the second hose and the transition sleeve of the first embodiment of the present application;

FIG. 16 is a cross-sectional view of the structure shown in FIG. 15;

FIG. 17 is a cross-sectional view of a first hose, a second hose, and a transition sleeve of a second embodiment of the present application;

FIG. 18 is a cross-sectional view of a first hose, a second hose, and a transition sleeve of a third embodiment of the present application;

FIG. 19 is a cross-sectional view of a first hose, a second hose, and a transition sleeve of a fourth embodiment of the present application;

FIG. 20 is a schematic view of the construction of a first hose, a second hose and a transition sleeve according to a fifth embodiment of the present application;

FIG. 21 is a symmetrical cross-sectional view of the structure shown in FIG. 20;

figure 22 is a schematic cross-sectional view taken in the direction N-N of figure 13 of part of the structure of a laryngeal mask in accordance with a first embodiment of the present application;

figure 23 is a schematic cross-sectional view taken in the direction N-N of figure 13 of part of the structure of a laryngeal mask in accordance with a second embodiment of the present application;

figure 24 is a schematic cross-sectional view taken in the direction N-N of figure 13 of part of the structure of a laryngeal mask in accordance with a third embodiment of the present application;

figure 25 is a schematic view of part of a laryngeal mask in accordance with a fourth embodiment of the present application;

description of the reference numerals

10. Laryngeal mask body 11, light guide member 110, plastic optical fiber 111, and electroluminescent device

112. Electric wire 12, conduit 121, pipe body 122, first partition wall

123. A second partition wall 123a, a first accommodating chamber 123b, a second accommodating chamber 101, an air guide passage

102. Light guide cavity channel 103, video cavity channel 102a, second blind end part 13 and sealing seat

103a, a first blind end portion 14, an air bag 151, a second hose 152, a first hose

1521. Hose body 1522, window portion 152a, step 152b, and abutting structure

153. Transition joint 154, seal 155, transition sleeve 16, connector

17. Stomach tube 20, video device 21, display 22, control unit

221. Light source emitting element 22a, light output port 154a, first through hole 154b, and second through hole

222. Power assembly 223, first steel wire 224, second steel wire 23, video tube

231. Image sensor 232, main body segment 233, snake bone segment 234 and video segment

90. Epiglottis 91, glottis 92, pharyngeal cavity 93, esophagus

13', airbag seat 13 ", airbag 15210, first corrugated section 15211, first rib

1510. Second ripple section 1511, second rib 15221, lid

15222. First and

second nesting parts

15223 and 15223

Detailed Description

In the present embodiment, "proximal" refers to a direction close to the operator, and "distal" refers to a direction away from the operator.

Referring to fig. 2-4, the laryngeal mask includes a laryngeal mask body 10 and an image device 20.

Referring to fig. 4, the video apparatus 20 includes a display 21, a video tube 23, and a control unit 22. The image tube 23 is in an elongated tubular shape, an image sensor 231 (see fig. 22-24) is disposed at a distal end of the image tube 23, and a cable (not shown) is disposed inside the image tube 23 and can transmit an image signal collected by the image sensor 231 to the display 21. The display 21 may have its own signal processing capability and image display function, or may have only an image display function, and other components process the image signal and display the processed image signal on the display 21.

Referring to fig. 3, the laryngeal mask body 10 includes a light guide 11 (fig. 11 and 12), a catheter 12, a sealing seat 13, a balloon 14 and a gastric tube 17. The seal holder 13 is connected to the distal outlet of the catheter 12, the proximal end of the catheter 12 is used for connecting the vision device 20 or a ventilator, and the gastric tube 17 extends from the proximal end of the catheter 12 to the distal end of the seal holder 13. It will be appreciated that the seal holder 13 may be of one-piece construction, for example of soft construction using silicone moulding; the sealing seat 13 may also be in the form of a balloon seat 13' and a balloon 13 ". In this embodiment, the seal seat 13 includes an airbag seat 13' and an airbag 13 ″.

Referring to fig. 11, an air guide channel 101 and a visual lumen 103 isolated from the air guide channel 101 are formed in the laryngeal mask body 10, and the air guide channel 101 and the visual lumen 103 both extend along the length direction of the catheter 12, and may extend from the proximal end to the distal end of the catheter 12, or may extend from a position along the length direction of the catheter 12 to the distal end. The visual cavity channel 103 and the air guide channel 101 are isolated from each other, and the air flow cannot enter the visual cavity channel 103 in the process of being guided into the sealing seat 13 through the air guide channel 101, so that the air guide channel 101 has better air tightness, and the air flow can be efficiently guided into the lung of a patient. The proximal end of the visual cavity 103 is formed as an open end, the distal end of the visual cavity 103 is formed with a first blind end 103a closed by a light-transmitting material, the visual tube 23 is insertable into the visual cavity 103, the distal end of the visual tube 23 and the distal end of the visual cavity 103 are both located in the seal holder 13, and the distal end of the visual tube 23 can be bent and reset, specifically, the control portion 22 can control the bending and resetting of the visual tube 23, for example, toward the upper side of the seal holder 13.

When the laryngeal mask of the embodiment of the application is used, the image tube 23 is inserted into the position corresponding to the first blind end 103a at the far end of the image cavity 103 from the near end of the image cavity 103, and after the laryngeal mask is used, the image tube 23 can be pulled out of the image cavity 103. The image tube 23 is enclosed within the image lumen 103 and does not contact the internal tissues of the patient during use, and the image tube 23 can be reused relatively safely. According to the relevant national standards, the equipment which can be reused in the operation needs high-grade disinfection after the operation if the equipment is contacted with the human tissue in the operation, and can be disinfected at a common grade after the operation if the equipment is not contacted with the human tissue in the operation. In the related art, the end of the image tube 23 is exposed in the sealing seat 13, and may contact secretions and the like in the patient and tissues such as the epiglottis 90 and the like of the patient, and thus, high-level disinfection such as immersion in a disinfectant solution is required after the operation. In the embodiment of the present application, the image tube 23 does not contact with the patient, and the disinfection process such as soaking in the disinfection solution is not required in the disinfection procedure after the operation, and the disinfection mode with a lower grade is adopted, such as wiping, so that the operation is convenient and fast, and the use cost is low.

In the prior art, the image sensor is located at the junction of the seal seat and the catheter, when the epiglottis 90 sags down, the epiglottis 90 may partially shield the image sensor 231 from receiving the light diffusely reflected by the glottis 91 and the peripheral tissues of the patient, so the display 21 may not or only partially present the images of the glottis 91 and the peripheral tissues, the image tube 23 and the display 21 may not play a role, and at this time, if the tracheal intubation is performed, blind insertion is performed, so the glottis of the patient may be damaged, or the laryngeal mask is pulled out again and then trial insertion is performed repeatedly, so the operation time for establishing the artificial airway may be prolonged, the operation risk is increased, and the risk of damage to the tissues of the patient is also increased. Therefore, in the embodiment of the present application, after the laryngeal mask is inserted into the patient, the distal end of the image tube 23 bypasses the tip of the epiglottis 90, and since the distal end of the image tube 23 can be bent and restored, the distal end of the image tube 23 can obtain a better view angle of the glottis and the peripheral region, even if the epiglottis 90 sags, the operator can control the distal end of the image tube 23 to bend and open the epiglottis to obtain a good view. For example, when the epiglottis 90 is not drooping, see FIG. 7, the distal end of the viewing tube 23 can be held around the tip of the epiglottis 90 and not bent; referring to fig. 8, the image tube 23 can be bent upward to bypass the tip of the epiglottis 90 to obtain a better visual field according to practical situations; when the epiglottis 90 droops, please refer to fig. 10, the operator controls the distal end of the image tube 23 to bend upwards, and the epiglottis 90 can be pulled out, so that the epiglottis 90 can be lightly pulled out by bending the distal end of the image tube 23 upwards, and the patient does not need to be forcibly adjusted by a rigid element like the prior art, so that the operation mode of the embodiment is milder, the operation difficulty is reduced, and the injury to the patient is reduced; moreover, the epiglottis can be poked through the image tube 23, and the transverse size of the laryngeal mask cannot be additionally increased, so that the requirement on the opening degree of a patient is not too high in the using process, and the adaptability is better. Meanwhile, in order to adjust the viewing angle direction of the distal end of the image tube 23, the bending angle at the distal end of the image tube 23 is controllable and can be adjusted, for example, bent upwards by 10 °, 20 °, 90 °, and so on, and after the distal end of the image tube 23 is bent, the operator can also control the distal end of the image tube 23 to be reset as required, that is, to be restored to the unbent state shown in fig. 9.

Referring to fig. 5, in a direction from the proximal end to the distal end of the view tube 23, the view tube 23 sequentially includes a main body segment 232, a snake bone segment 233 and a view segment 234, wherein the image sensor 231 is disposed on the view segment 234, at least a portion of the snake bone segment 233 is located in the seal seat 13, and the snake bone segment 233 can be controllably bent and repositioned, i.e., the distal end of the view tube 23 is bent and repositioned by the snake bone segment 233.

Referring to fig. 6, the control portion 22 includes a first wire 223, a second wire 224 and a power assembly 222, wherein, the first steel wire 223 and the second steel wire 224 are both arranged in the video tube 23, the proximal ends of the first steel wire 223 and the second steel wire 224 are both connected with the power component 222 in a driving way, the distal end of the first steel wire 223 is connected with the top of the inner side of the distal end of the snake bone section 233, the distal end of the second steel wire 224 is connected with the bottom of the inner side of the distal end of the snake bone section 233, that is, the first and second steel wires 223 and 224 are inserted into the inside of the snake bone segment 233, and when it is required to be bent upward, the power assembly 222 crimps the first wire 223 such that the effective length of the first wire 223 is shortened, the first wire 223 causes the snake bone segment 233 to bend upward, when repositioning is desired, the power assembly 222 crimps the second wire 224 such that the effective length of the second wire 224 is shortened, at the same time, the first steel wire 223 is released, and the reduction of the snake bone segment 233 is achieved by the second steel wire 224.

The end surface of the first blind end 103a may be a plane or an outwardly convex arc surface, such as a spherical cap, an ellipsoid, or the like. In the present embodiment, please refer to fig. 14-16, in the first to third embodiments of the present application, the end surface of the first blind end 103a is formed as an arc surface protruding outward, it can be understood that the first blind end 103a in the far-end video receiving structure of the first to third embodiments may also be a plane. Referring to fig. 19 and 20, in the fourth and fifth embodiments of the present application, the end surface of the first blind end 103a is formed as a flat surface, and it can be understood that the first blind end 103a in the far-end image receiving structure of the fifth embodiment may also be an arc surface. Furthermore, in order to reduce the influence of the greater attenuation generated after the light enters the first blind end 103a, on the imaging effect of the image sensor 231, the first blind end 103a may be made of a material with a better light transmittance, such as Polycarbonate (PC) and polymethyl methacrylate (PMMA).

Further, when the temperature of the inner and outer sides of the first blind end portion 103a and the distal end of the image tube 23 is lower than the temperature of the patient for a short period of time after the laryngeal mask body 10 is placed in the patient, the interface is easily condensed into fine water drops, which may cause the acquired image to be blurred, and for this reason, in the embodiment of the present application, a heating element (not shown), such as one or more resistors, is formed at the distal end of the image end to heat the temperature of the inner side of the first blind end portion 103a to substantially the temperature of the human body at a proper time, so as to prevent the formation of fine water drops due to condensation. It is understood that the heating member should be of a type that avoids emitting light while generating heat as much as possible, so as to avoid that the light emitted from the heating member is reflected on the inner side surface of the first blind end portion 103a to affect the imaging effect of the image sensor 231. Furthermore, an anti-fog coating (not shown) may be coated on the outer side of the first blind end 103a to further prevent the generation of condensation water drops.

The duct 12 has a first accommodating chamber 123a for accommodating a part of the image tube 23, and the duct 12 may be formed by bundling a plurality of plastic tubes or may be of a tube structure without limitation in the form of structure. It should be noted that, in order to ensure that the air flow can efficiently enter the sealing seat 13 through the air guide channel 101 and then enter the lung of the patient, it is necessary to ensure that the air flow entering the sealing seat 13 does not leak from the gap between the image cavity 103, the light guide cavity 102 and the air guide channel 101, otherwise, the air flow cannot effectively enter the lung of the patient, and the patient is not supplied with oxygen sufficiently and further brings a life risk. To this end, referring to fig. 14 and 15, the laryngeal mask body 10 according to the embodiment of the present invention further includes a first hose 152, a transition sleeve 155, a sealing portion 154 and a transition joint 153, the sealing portion 154 isolates the first receiving chamber 123a in the conduit 12 from the space in the sealing seat 13, and a first through hole 154a is formed in the sealing portion 154. The proximal end of the first tube 152 is an open end, the distal end is closed by a transparent material, the distal end of the first tube 152 is the first blind end 103a, the proximal end of the first tube 152 is hermetically connected to the periphery of the first through hole 154a of the sealing portion 154, the space in the first tube 152 is communicated with the first accommodating chamber 123a in the catheter 12, and the image tube 23 is inserted into the first accommodating chamber 123a and the first tube 152, that is, the first accommodating chamber 123a in the catheter 12 and the space in the first tube 152 together enclose the entire image channel 103 or a part of the image channel 103. It should be noted that the structural form of the sealing portion 154 is not limited as long as the first accommodating chamber 123a and the space in the sealing seat 13 are isolated from each other, for example, the sealing portion 154 may be an integrally molded structure; the sealing part 154 may be a split structure, for example, when a fabrication hole is formed in a part of the structure of the sealing part 154, the fabrication hole needs to be sealed by a plug, and in this case, the plug is formed as a part of the sealing part 154.

It will be appreciated that the first flexible tube 152 is made of a soft material, so that the first flexible tube 152 can easily follow the distal end of the image tube 23 to bend synchronously, and the resistance of the first flexible tube 152 to the bending of the image tube 23 is reduced.

Further, referring to fig. 14 and 15, in order to improve the connection reliability between the first hose 152 and the sealing portion 154, the transition sleeve 155 is fixedly connected to the proximal end of the first hose 152, for example, as an integrally formed structure; the transition joint 153 is formed around a first through hole 154a of a side surface of the sealing portion 154 facing the sealing seat 13, for example, an integrally formed structure, and the transition sleeve 155 is fixedly sleeved with the transition joint 153, specifically, the transition sleeve 155 is sleeved on an outer peripheral surface of the transition joint 153, or the transition joint 153 is sleeved on an outer peripheral surface of the transition sleeve 155, and gluing is performed at the sleeved position. In the embodiment of the present application, by the solutions of the transition sleeve 155 and the transition joint 153, the connection strength between the first hose 152 and the sealing portion 154 is increased (the sleeve joint of the transition sleeve 155 and the transition joint 153 greatly increases the adhesive area), the sealing performance of the video cavity 103 is ensured, and the difficulty in production and manufacturing is also reduced.

In the prior art, a light guide is integrated at the end of a video tube, specifically, referring to fig. 1, in the prior art, a light source 1a and an image sensor 1b are integrated at the end of a video tube 1, the light source 1a and the image sensor 1b are arranged at the far end of a video channel, and a transparent window 3 is arranged outside the far end of the video channel, because the video tube in the prior art does not have the bending and resetting functions, the end of the video tube 1 needs to be tightly attached to the transparent window 3 to avoid light reflection; if a gap exists between the end of the image tube 1 and the transparent window 3, light (indicated by an arrow in the figure) emitted from the light source 1a can be reflected at some angles at the inner side of the transparent window 3, and the reflected light is emitted to the image sensor 1b, so that a light reflecting effect is generated, and imaging is interfered; furthermore, when the epiglottis sags, it tends to cover the position of the image sensor 1b and the light source 1a, and the display cannot present or can only partially present images of the glottis and surrounding tissue. In the embodiment of the present application, since the end of the image tube 1 can be bent and reset, if the light guide member in the prior art is integrated at the end of the image tube, when the image tube moves, a gap is inevitably formed between the end of the image tube and the transparent window, and therefore, it is necessary to improve the gap; specifically, referring to fig. 13, the light guide 11 extends along the length direction of the laryngeal mask body 10, the distal end of the light guide 11 is located in the sealing seat 13, the distal end portion of the light guide 11 and the first blind end portion 103a are isolated from each other (see fig. 22-25), which means that the distal end of the light guide 11 and the distal end of the image tube 23 disposed on the first blind end portion 103a are isolated from each other, light emitted from the distal end of the light guide 11 cannot directly enter the image sensor 231, and light emitted from the distal end of the light guide 11 cannot substantially enter the inner side of the end face of the first blind end portion 103a and then be reflected onto the image sensor 231, so that the image sensor 231 cannot be substantially interfered when collecting light signals diffusely reflected by tissues in the patient, which is helpful for the image tube 23 to output high-quality images; meanwhile, the far end of the image tube 23 is not provided with a light source, so that the manufacturing process of the image tube 23 is simpler.

In an embodiment of the present application, the far end of the image tube 23 can drive the far end of the light guide member 11 to be bent and reset synchronously, so that the direction of the light emitted by the light guide member 11 can be changed synchronously with the visual angle direction of the far end of the image tube 23 all the time, and the illumination intensity required by the sensor of the image tube 23 is ensured all the time. In an embodiment not shown, the distal end of the light guide 11 is fixedly connected to the seal holder 13, and it should be noted that the fixed connection means that there is no relative movement between the distal end of the light guide 11 and the seal holder 13, that is, the distal end of the light guide 11 remains fixed and does not follow the bending of the distal end of the view tube 23, and the light guide 11 provides fixed illumination to the view tube 23, illuminating the space inside the seal holder 13 and the space inside the patient's body near the opening region of the seal holder 13. There are various ways to fixedly connect the distal end of the light guide 11 to the sealing seat 13, for example, the distal end of the light guide 11 is adhered or clamped to the inner surface of the sealing seat 13, and for example, the distal end of the light guide 11 is embedded in the molding structure of the sealing seat 13.

The light guide 11 may be a plastic optical fiber 110, or may be in the form of an electroluminescent device 111 coupled to an electrical cord 112. Specifically, when the light guide 11 is the plastic fiber 110, referring to fig. 25, the distal end of the plastic fiber 110 can be exposed in the sealing seat 13. The far end of the plastic optical fiber 110 is bonded with the outer wall of the first hose 152, so that the far end of the plastic optical fiber 110 and the far end of the video tube 23 can be synchronously bent and reset, and the safety performance of the laryngeal mask can be improved; alternatively, the distal end of the plastic optical fiber 110 is connected to the inner surface of the sealing seat 13. Specifically, when the laryngeal mask is used, the video tube 23 generates an outward force in the length direction on the first flexible tube 152 during the insertion process, and the first flexible tube 152 is bent when the video tube 23 is bent, which may cause the first flexible tube 152 (or the window portion 1522) to fall off, although the possibility that the first flexible tube 152 falls off is very low in the two cases, the plastic optical fiber 110 connects the first flexible tube 152, so that the first flexible tube 152 can be further prevented from falling off the laryngeal mask main body 10 and entering the airway of the patient. When the light guide 11 is in a structure in which the electroluminescent device 111 is coupled to the electric wire 112, the outer surface of the light guide 11 needs to be insulated to prevent electric shock to a human body.

In order to facilitate sealing and installation of the light guide member 11, in some embodiments of the present application, a light guide channel 102 is further formed in the laryngeal mask body 10, and the light guide member 11 is pre-arranged in the light guide channel 102 (refer to fig. 11 and 12). Specifically, the proximal end of the light guide channel 102 is formed as an open end, and the proximal end of the light guide member 11 is exposed at the proximal end of the light guide channel 102; to prevent the light guide 11 from moving along the proximal end of the light guide channel 102, a fixing cover (not shown) may be disposed outside the proximal end of the light guide channel 102 to fix the proximal end of the light guide 11. The distal end of the light guide channel 102 is formed with a second blind end portion 102a formed by sealing a light-transmitting material (when the light guide member 11 is the plastic optical fiber 110 and the distal end of the plastic optical fiber 110 is exposed in the sealing seat 13, the light guide channel 102 does not have the second blind end portion 102a), the distal end of the light guide member 11 and the distal end of the light guide channel 102 are both located in the sealing seat 13, and the first blind end portion 103a and the second blind end portion 102a are isolated from each other. In this embodiment, since the first blind end portion 103a and the second blind end portion 102a are isolated from each other, please refer to fig. 22-24, light rays (directions indicated by arrows in fig. 22-24) in the light guide 11 are emitted through the second blind end portion 102a to illuminate a local region of human tissue, light rays diffusely reflected by the human tissue enter the first blind end portion 103a, and light signals are collected by the image sensor 231 to form image signals and then transmitted to the display 21. Further, referring to fig. 18 and fig. 19, in the proximal-to-distal direction, the end surface of the first blind end 103a and the end surface of the second blind end 102a are substantially flush, so that the interference of the image sensor 231 caused by the light emitted from the light guide 11 passing through the second blind end 102a and then obliquely entering the first blind end 103a can be better avoided.

The optical image cavity 103 and the optical guide cavity 102 can be completely isolated from each other, so that the insertion of the optical guide member 11 and the insertion of the optical image tube 23 do not interfere with each other, that is, the optical guide member 11 cannot be inserted into the optical image cavity 103 when being inserted into the optical guide cavity 102, and similarly, the optical image tube 23 cannot be inserted into the optical guide cavity 102 when being inserted into the optical image cavity 103, so that the optical guide member 11 and the optical image tube 23 can be inserted into place quickly; since the image tube 23 is inserted in the preoperative field, the time for inserting the image tube 23 is saved, that is, the preoperative preparation time is saved, the time is valuable for the operation, especially for emergency rooms or emergency rescue situations in accident fields, the minute and the second are necessary, and the minute and the second are very important. Of course, the optical cavity 103 and the light guide cavity 102 may be partially isolated from each other, for example, only the distal ends are isolated from each other, and the rest of the cavities are communicated with each other, i.e., the cavity between the proximal end of the optical cavity 103 and the second blind end 102a and the cavity between the proximal end of the light guide cavity 102 and the first blind end 103a are communicated.

Referring to fig. 15-18, in order to effectively seal the distal end of the light guide member 11, the laryngeal mask body 10 according to some embodiments of the present application further includes a second flexible tube 151, a proximal end of the second flexible tube 151 is formed as an open end, a distal end of the second flexible tube 151 is closed by a light-transmitting material, and a distal end of the second flexible tube 151 is formed as the second blind end 102 a. The proximal end of the second hose 151 is fixedly connected to the transition sleeve 155, for example, an integrally formed structure, that is, the proximal ends of the first hose 152 and the second hose 151 are integrally formed with the transition sleeve 155, so that the joint strength of the joint between the three can be ensured even in the production process, and meanwhile, the sealing performance between the three can be ensured. In this embodiment, the sealing portion 154 is formed with a second through hole 154b, the light guide channel 102 passes through the second through hole 154b, the transition joint 153 is simultaneously sealed and abutted around the first through hole 154a and the second through hole 154b, and the first hose 152 and the second hose 151 are both fixedly sleeved with the transition joint 153 through the transition sleeve 155.

The second hose 151 is constructed of a soft material, such as soft PVC. It is understood that the space inside the transition joint 153, which is in communication with the first hose 152, and the space inside the transition joint 151, which is in communication with the second hose 151, may be isolated from each other or may be in communication with each other.

Further, the first hose 152 and the second hose 151 at least partially extend into the sealed seat 13, that is, the distal end portion of the image tube 23 and the distal end portion of the light guide member 11 are both located in the sealed seat 13, so that the light guide member 11 can illuminate the pharyngeal cavity and the peripheral area inside the human body to a large extent, including the glottis 91 and the epiglottis 90, and meanwhile, the distal end of the image tube 23 can also collect images in a large area, thereby improving the visualization effect of the laryngeal mask.

It is understood that the interiors of the first hose 152 and the second hose 151 may be in communication with each other or isolated from each other, as long as the first blind end 103a and the second blind end 102a are ensured to be blocked from each other.

Specifically, referring to fig. 15 and 16, in the structure of the first hose 152, the second hose 151 and the transition sleeve 155 according to the first embodiment of the present application, the first hose 152 and the second hose 151 are isolated from each other. In this embodiment, referring to fig. 16, the first hose 152 includes a hose body 1521 with two open ends and a window portion 1522 covering the distal end of the hose body 1521, the light transmission performance of the window portion 1522 is higher than that of the hose body 1521, the window portion 1522 is formed as the first blind end 103a, and the end surface of the first blind end 103a is formed as an outwardly convex arc surface. Specifically, the window portion 1522 is made of a material with better light transmittance, such as PC, PMM, etc., to ensure that light with sufficient intensity enters the image sensor 231; the hose body 1521 may be made of a relatively soft material, such as soft PVC, so as to achieve the bending performance of the first hose 152. The window 1522 may cover the outside of the distal end of the hose body 1521; in this embodiment, the proximal portion of the window portion 1522 extends into the hose body 1521 and is adhered to the hose body 1521, so as to enhance the connection strength between the two. Further, the inner wall of hose body 1521 is formed with the step 152a that deviates from window portion 1522, and the proximal end of window portion 1522 is formed with butt structure 152b, and butt structure 152b stretches into in hose body 1521 and with step 152a butt, so, when image pipe 23 inserted in first chamber, the cooperation of step 152a and butt structure 152b can prevent that window portion 1522 breaks away from hose body 1521 under the effort of image pipe 23, can further increase the reliability of laryngeal mask. Because step 152a deviates from window portion 1522 design, even window portion 1522 breaks away from with hose body 1521 because of external force reason, window portion 1522 is blockked by step 152a and also can not drop to the patient's air flue from hose body 1521, has guaranteed the security of operation, avoids the medical malpractice to take place.

Referring to fig. 17, in the structure of the first hose 152, the second hose 151, and the transition sleeve 155 according to the second embodiment of the present application, unlike the first embodiment, the end surface of the first blind end 103a is formed to be flat in the present embodiment.

Referring to fig. 18, in the structure of the first hose 152, the second hose 151 and the transition sleeve 155 according to the third embodiment of the present disclosure, the first hose 152 and the second hose 151 are also isolated from each other, and unlike the first embodiment, in this embodiment, the first hose 152 is an integral structure, that is, the first hose 152 itself has good flexibility and bending performance and good light transmittance. Further, the first hose 152 and the second hose 151 are integrally formed, so that the difficulty in production and manufacture is simplified, and the two hoses can be bent synchronously.

Referring to fig. 19, in the structure of the first hose 152, the second hose 151 and the transition sleeve 155 according to the fourth embodiment of the present application, the first hose 152 and the second hose 151 are communicated with each other, and unlike fig. 17, the second blind end 102a is protruded from the first blind end 103a, and the two are isolated from each other. Further, in this embodiment, the first hose 152 and the second hose 151 are integrally formed, which not only simplifies the manufacturing difficulty, but also facilitates the synchronous bending of the two hoses.

Referring to fig. 20 and 21, in the structure of the first hose 152, the second hose 151 and the transition sleeve 155 according to the fifth embodiment of the present application, unlike the first embodiment, the first hose 152 includes a first corrugated section 15210 and a first rib 15211 extending along the length direction of the first corrugated section 15210, the inner wall of the first corrugated section 15210 is a smooth structure, and the first corrugated section 15210 may be formed on the hose body 1521 according to the first embodiment. The thickness of the first ribs 15211 is greater than the corresponding thickness at the troughs of the first corrugated section 15210; the second hose 151 includes a second corrugated section 1510 and a second rib 1511 extending along a length direction of the second corrugated section 1510, an inner wall of the second corrugated section 1510 is a smooth structure, and a thickness of the second rib 1511 is greater than a corresponding thickness at a valley of the second corrugated section 1510. The first corrugated section 15210 has peaks and valleys, and the inner wall is a smooth structure, so that the thickness at the peaks is greater than the thickness at the valleys, and the peaks and the valleys are alternately arranged along the length direction of the first corrugated section 15210, so that the thickness of the first corrugated section 15210 is alternately arranged in the thickness direction, and similarly, the thickness of the second corrugated section 1510 is also alternately arranged in the thickness direction.

Taking the first corrugated section 15210 as an example, the smooth structure means that the inner wall of the first corrugated section 15210 has no step structure, and is not related to the roughness of the inner wall of the first corrugated section 15210, that is, the inner wall of the first corrugated section 15210 may be relatively rough, such as a frosted structure, or may be relatively smooth, which is not limited herein.

It can be understood that, in the forming process of the hose, when the thickness of the hose is thinner, the flowability of the raw stock in the mold is poorer, and the raw stock cannot flow sufficiently to the end of the flowing direction, so that a leak may exist in the structure at the flowing end of the raw stock of the hose, and the hose is a waste product; or the thickness is not uniform, the thin part is extremely thin, the hose is easy to damage, and the quality is unqualified. Therefore, in the application, taking the molding process of the first hose 152 as an example, in the injection molding process of the first hose 152, the raw stock flows along the direction of the position of the mold corresponding to the first rib 15211, the first rib 15211 is similar to a main flow path, and since the thickness of the first rib 15211 is thick, that is, the space of the position of the mold corresponding to the first rib 15211 is large, the flow resistance of the raw stock can be reduced, and the raw stock can smoothly flow; the original slurry flows from the position corresponding to the first rib 15211 to the position corresponding to the wave crest at the two transverse sides of the original slurry, the wave crest is similar to a flowing branch, and the thickness of the wave crest is thicker, so that the flowing resistance of the original slurry can be reduced, and the original slurry can be filled in the position corresponding to the wave crest of the mold; meanwhile, the primary pulp entering the wave crests of the mold can flow from the wave crests to the two sides of the wave crests, the wave troughs are thinner, the flow resistance of the primary pulp in the mold is larger, the pulp at the corresponding positions of the two adjacent wave crests can flow to the corresponding positions of the middle wave troughs at the same time, the flowing distance of the primary pulp is shorter, and the primary pulp can fully reach the corresponding positions of the wave troughs to be molded.

Through the design of the first ribs 15211, the second ribs 1511 and the wave crests, the wave troughs can have thinner thickness and higher quality reliability. Due to the fact that the wave troughs are relatively thin in thickness, the first hose 152 and the second hose 151 can have good flexibility and can be bent and reset synchronously along with the video tube. The first ribs 15211, the second ribs 1511 and the wave crests are designed in thickness, so that the structural strength of the first hose 152 and the second hose 151 is increased, and the first hose 152 and the second hose 151 cannot deform under the alternating action of positive pressure and negative pressure to block an air guide channel.

Further, the neutral layer of first hose 152 is in the same neutral layer plane as the neutral layer of second hose 151, and first rib 15211 and second rib 1511 are in the neutral layer plane, such that first rib 15211 and second rib 1511 do not substantially provide resistance to bending of first hose 152 and second hose 151.

It will be appreciated that in an embodiment not shown, where the laryngeal mask is not provided with a light guide as described above, the laryngeal mask may comprise only the first hose of any of the embodiments described above, but not the second hose. In this embodiment, the first hose 152 and the second hose 151 are of an integrally formed structure, the outer wall of the first hose 152 is connected to the outer wall of the second hose 151, and the same rib is sandwiched between the first corrugated section 15210 and the second corrugated section 1510, that is, in this case, the first rib 15211 and the second rib 1511 are formed as the same rib.

Various embodiments of the laryngeal mask are described in detail below with reference to the drawings.

Laryngeal mask of the first embodiment

Referring to fig. 11, 12, 14 and 22, in the laryngeal mask of the first embodiment of the present application, the conduit 12 includes a tube body 121, a first partition wall 122 and a second partition wall 123. The tube body 121 is substantially hollow and tubular, and the first partition wall 122 and the second partition wall 123 are located inside the tube body 121 and extend along the length direction of the tube body 121, wherein the inner wall of the first partition wall 122 corresponding to the tube body 121 is enclosed as the air guide passage 101. If the mask is to be designed for intubation, the inner wall of the airway channel 101 should be relatively smooth, e.g., the airway channel 101 may be generally circular in cross-section and the airway channel 101 may have a cross-sectional dimension that ensures smooth intubation.

The second partition wall 123 encloses a first accommodation chamber 123a corresponding to the tube body 121, and a part of the structure of the image tube 23 is accommodated in the first accommodation chamber 123a, that is, the first accommodation chamber 123a belongs to a part of the image channel 103. To facilitate guiding the rapid insertion of the vision tube 23, the first accommodation chamber 123a is substantially circular in cross section. It will be appreciated that the cross-sectional dimension of the first receiving chamber 123a is required to ensure that the sight tube can pass through smoothly.

With reference to fig. 11, the space inside the tube body 121 except the first accommodating chamber 123a and the air guide channel 101 is formed as a second accommodating chamber 123b, that is, the first partition wall 122, the second partition wall 123 and the corresponding portion of the tube body 121 are commonly enclosed to form a second accommodating chamber 123b, and part of the structure of the light guide member 11 is accommodated in the second accommodating chamber 123b, that is, the second accommodating chamber 123b belongs to one part of the light guide channel 102.

With continued reference to fig. 11, the first partition wall 122 and the second partition wall 123 are disposed substantially along the opposite sides of the tube body 121 in the width direction, that is, the air guide passage 101 is located at one side of the tube body 121 in the width direction, and the image guide channel 103 and the light guide channel 102 are located at the other side of the tube body 121 in the width direction, so that the light guide 11 and the portion of the image tube 23 located in the sealing seat 13 do not affect the endotracheal intubation operation.

Referring to fig. 14, a sealing portion 154 is disposed at the distal end of the tube body 121, specifically, the sealing portion 154 is disposed at the distal ends of the first accommodating chamber 123a and the second accommodating chamber 123b, and the periphery of the sealing portion 154 is connected with the inner wall of the tube body 121 in a sealing manner, for example, an integrally molded structure, and the ends of the first partition wall 122 and the second partition wall 123 are in sealing abutment with a side surface of the sealing portion 154 facing away from the sealing seat 13. The sealing portion 154 has a first through hole 154a and a second through hole 154b formed therein, the first through hole 154a communicating with the first accommodation chamber 123a, and the second through hole 154b communicating with the second accommodation chamber 123 b.

In this embodiment, referring to fig. 22, the light guide member 11 is formed as a plastic optical fiber 110 (POF) pre-disposed in the light guide channel 102, the plastic optical fiber 110 is an optical fiber made of a high transparent polymer, such as an optical fiber using any one or more of Polystyrene (PS), polymethyl methacrylate (PMM), and Polycarbonate (PC) as a core material, and PMM, fluoroplastic, and the like as a sheath material. The plastic optical fiber 110 is light, flexible, and more resistant to damage (e.g., vibration or bending); the mature simple drawing process of the polymer can be utilized, and the cost is lower; good flexibility and easy processing and use. Laryngeal mask main part 10 is in the use, operating personnel can buckle laryngeal mask main part 10 to different degrees, in order to put into the patient with it smoothly, this application embodiment is ingenious with the leaded light of plastic fiber 110 application in laryngeal mask main part 10, so that leaded light 11 can not break at laryngeal mask main part 10 in-process of buckling, and then guarantee the reliability and the high-quality illumination performance of leaded light 11, furthermore, the plastic fiber 110 of this application is to the formula purity of raw and other materials, the frequency bandwidth requirement is all not high, as long as guarantee can lead the light and do not need the communication function, can also greatly reduce manufacturing cost, be particularly favorable to popularization and application.

In this embodiment, referring to fig. 13, the control portion 22 includes a light source emitting member 221 capable of emitting visible light and a light output port 22a, and the proximal end of the light guide member 11 is abutted to the light output port 22 a.

The operation and working principle of the laryngeal mask of the first embodiment of the present application are as follows:

firstly, the image tube 23 is inserted into the image cavity 103, when the image tube 23 is inserted in place, the image device 20 and the laryngeal mask main body 10 are locked, so that relative movement between the image device 20 and the laryngeal mask main body 10 cannot be generated, at the moment, because the image device 20 and the laryngeal mask main body 10 are locked during design, the light output port 22a and the near end of the light guide member 11 can be ensured to be in an aligned position, no intentional butt joint is needed, time is saved, and the operation is simple and convenient; the laryngeal mask body 10 and the viewing device 20 are ready for connection. It will be appreciated, referring to figure 3, that to facilitate locking of the viewing device 20 to the laryngeal mask body 10, a connector 16 may be provided at the proximal end of the laryngeal mask body 10.

Subsequently, the power supply of the video apparatus 20 is started, and the display 21 is lighted;

then, the visualization function of the image device 20 is turned on, and the light source emitter 221 outputs visible light to the proximal end of the light guide 11, and finally emits the visible light to the internal tissue of the human body through the distal end portion of the light guide 11. Then, referring to fig. 9, the operator inserts the laryngeal mask body 10 gradually from the oral cavity of the patient until the distal end portion of the laryngeal mask body abuts against the entrance of the food channel 93, the image signal collected by the image sensor 231 is transmitted to the display 21, the operator can roughly judge whether the placement position of the distal end of the laryngeal mask body 10 is proper according to the image displayed by the display 21, and if not, the operator needs to adjust the placement position timely to ensure that the distal end portion of the laryngeal mask body 10 can seal the entrance of the esophagus 93 of the patient to prevent gas from entering the stomach of the patient; ensuring that the air bag 14 fits around and surrounds the glottis 91 opening after the air bag 14 is inflated. Referring to fig. 10, when the epiglottis 90 hangs down to block the image sensor 231, the control portion 22 of the imaging device 20 is operated to bend the distal end portion of the tube 23 upward, either to bypass the epiglottis 90 to obtain a clearer view of the glottis and surrounding tissues, or to pull open the epiglottis 90 to facilitate intubation.

If the tracheal intubation is not required, the ventilator circuit connector is directly connected to the proximal end of the airway passage 101 after the visual device 20 is removed.

If an endotracheal tube is required, which operates under visualization, the trachea is inserted gradually from the proximal end of the airway passage 101 to the distal end, through the sealing seat 13 and the glottis 91 in order to the patient's airway (the direction of the arrows in fig. 9 and 10 indicate the passage of gas to the patient's airway). It should be noted that, in the process of trachea intubation, the near end of the trachea can be connected with a breathing machine pipeline connector, and the patient can be ventilated while intubation is carried out; when the trachea is inserted in place, the joint of the breathing machine pipeline is disconnected, the laryngeal mask main body 10 and the visual device are pulled out, the trachea is reserved, and then the joint of the breathing machine pipeline is connected to the near end of the trachea.

In other embodiments not shown in the drawings, a light source emitting element capable of emitting visible light may be preset at the proximal end of the plastic optical fiber 110, after the image device 20 is connected to the laryngeal mask body 10, a conducting wire in the image device 20 is butted with the light source emitting element, and when the image device 20 is started, the visible light emitted by the light source emitting element is transmitted to the distal end through the proximal end of the plastic optical fiber 110.

The laryngeal mask of this embodiment is illustrated by taking the structures of the first hose, the second hose and the transition sleeve in the first embodiment as an example, and it should be noted that the structures of the first hose, the second hose and the transition sleeve in the second embodiment to the fifth embodiment may also be used, and are not described again here.

Laryngeal mask of the second embodiment

Referring to fig. 23, in the second embodiment of the present application, unlike the first embodiment, the optical cavity 103 and the light guide cavity 102 are isolated from each other except for the first flexible tube 152 and the second flexible tube 151, and the other cavities are communicated with each other, that is, the cavity between the proximal end of the optical cavity 103 and the proximal end of the first flexible tube 152 and the cavity between the proximal end of the light guide cavity 102 and the proximal end of the second flexible tube 151 are communicated. Specifically, the tube body 121 is formed with the first partition wall 122, and without the second partition wall 123 in the laryngeal mask of the first embodiment, the interior of the tube body 121 is partitioned by the first partition wall 122 into two separate spaces, one of which is the air guide passage 101, and the other of which is formed as a compartment that accommodates both the light guide 11 and the sight glass 23.

Laryngeal mask of the third embodiment

Referring to fig. 24, in the laryngeal mask of the third embodiment of the present application, unlike the first embodiment, the light guide member 11 includes an electric wire 112 and an electroluminescent device 111, and the electroluminescent device 111 is a device capable of emitting light when energized, such as an LED lamp. A lead wire (not shown) is provided in the control section 22. The electroluminescent device 111 is disposed at the distal end of the light guide channel 102, the electrical wire 112 is connected to the electroluminescent device 111, and the electrical wire 112 extends along the length of the catheter 12 such that the port of the electrical wire 112 is exposed at the proximal end of the catheter body 121. When the video unit 20 is connected to the laryngeal mask body 10, the wires in the video unit 20 are connected to the wires 112, and when the video unit 20 is activated, the electro-illuminator 111 is energized to illuminate the distal region of the light-conducting lumen 102. It should be noted that, in order to facilitate the reliability of the electrical connection between the electric wire 112 and the lead, a quick connector (not shown) may be provided at the end of the tube body 121, and when the image device 20 is mated with the laryngeal mask body 10, the lead in the image device 20 and the electric wire 112 are automatically mated through the quick connector. It is understood that the structural form of the light guide member 11 in the second embodiment may be the structural form of the light guide member 11 in the third embodiment.

Laryngeal mask of the fourth embodiment

Referring to fig. 25, in the present embodiment, the light guide 11 is formed as the plastic optical fiber 110, the distal end of the light guide 11 is exposed in the sealing seat 13, and the distal end of the light guide 11 is adhered to the first flexible tube 152, or the distal end of the light guide 11 is connected to the inner surface of the sealing seat 13.

In another embodiment, not shown, and unlike the laryngeal mask of the first to third embodiments described above, the tube 12 is formed by bundling a plurality of separate plastic tubes, i.e. the tube 12 comprises a first plastic tube (not shown), a second plastic tube (not shown) and a third plastic tube (not shown) which are separate from each other, wherein the interior of the third plastic tube forms the air guide channel 101; the interior of the first plastic tube and the first cavity jointly form a visual cavity channel 103; the interior of the second plastic tube forms together with the second lumen a light-conducting lumen 102.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The laryngeal mask comprises a laryngeal mask body (10) and an image device (20), wherein the laryngeal mask body (10) comprises a catheter (12) and a sealing seat (13) connected to the distal end of the catheter (12), the laryngeal mask is characterized in that the image device (20) comprises a control part (22) and an image tube (23) connected with the control part (22), an image sensor (231) is arranged at the distal end of the image tube (23), and an air guide channel (101) and an image cavity channel (103) are formed in the laryngeal mask body (10); a first light-transmitting blind end part (103a) is formed at the far end of the video cavity channel (103), the video tube (23) can be inserted into the video cavity channel (103) in an inserting mode, the far end of the video cavity channel (103) and the far end of the video tube (23) extend into the space in the sealing seat (13), and the far end of the video tube (23) can be bent and reset under the control of the control part (22); the laryngeal mask body (10) comprises a first hose (152) extending at least partially into a space within the sealing seat (13), the distal end of the view tube (23) being located within the first hose (152).

2. A laryngeal mask according to claim 1, characterised in that the end face of the first blind end (103a) is formed as a plane or as an outwardly convex arc.

3. The laryngeal mask according to claim 1, characterised in that the material of the first blind end (103a) is polycarbonate or polymethylmethacrylate.

4. A laryngeal mask according to claim 1, characterised in that the tube (12) has formed in it a first housing chamber (123a) for housing part of the image tube (23); the laryngeal mask body (10) comprises a sealing part (154), the sealing part (154) isolates the first accommodating chamber (123a) from a space in the sealing seat (13), and a first through hole (154a) is formed in the sealing part (154); the distal end of the first hose (152) is formed as the first blind end portion (103a), the proximal end of the first hose (152) is sealingly connected to the periphery of the first through hole (154a) of the sealing portion (154), and the image tube (23) is inserted into the first accommodation chamber (123a) and the first hose (152).

5. The laryngeal mask according to claim 4, characterised in that the first hose (152) comprises a first corrugated section (15210) and first ribs (15211) extending in the length direction of the first corrugated section (15210), the inner wall of the first corrugated section (15210) is of a smooth structure, and the thickness of the first ribs (15211) is larger than the corresponding thickness of the first corrugated section (15210) at the troughs.

6. A laryngeal mask according to claim 4 or 5, characterised in that the first hose (152) comprises a hose body (1521) being open at both ends and a window portion (1522) connected to the distal end of the hose body (1521), the window portion (1522) having a higher light transmission performance than the hose body (1521), the window portion (1522) being formed as the first blind end (103 a).

7. The laryngeal mask according to claim 6, characterised in that the inner wall of the hose body (1521) is formed with a step (152a) facing away from the window portion (1522), the proximal end of the window portion (1522) is formed with an abutment structure (152b), the abutment structure (152b) protrudes into the hose body (1521) and abuts against the step (152a), and the part of the window portion (1522) protruding into the hose body (1521) is glued to the hose body (1521); or the window part (1522) covers the outer side of the far end of the hose body (1521).

8. A laryngeal mask according to claim 4, characterised in that the laryngeal mask body (10) comprises a light guide (11) extending in the length direction of the view tube (23), the distal end of the light guide (11) and the first blind end (103a) being arranged in a mutually blocking manner.

9. The laryngeal mask according to claim 8, characterised in that the laryngeal mask body (10) is formed with a light guiding lumen (102), the light guide (11) is pre-arranged in the light guiding lumen (102), the distal end of the light guiding lumen (102) is formed with a light transmitting second blind end (102a), the distal end of the light guiding lumen (102) and the distal end of the light guide (11) are both located in the space inside the sealing seat (13), and the first blind end (103a) and the second blind end (102a) are arranged in a mutually blocking manner.

10. A laryngeal mask according to claim 9, characterised in that a second receiving chamber (123b) is formed in the tube (12) for receiving part of the light guide (11), that the laryngeal mask body (10) comprises a second hose (151) at least partly in a space inside the sealing seat (13), and that a second through hole (154b) is formed in the sealing portion (154); the distal end of the second hose (151) is formed as the second blind end portion (102a), the proximal end of the second hose (151) is hermetically connected with the periphery of the second through hole (154b), the light guide member (11) is arranged in the second accommodating chamber (123b) and the second hose (151) in a penetrating manner, and the distal end of the light guide member (11) is positioned in the second hose (151).

11. The laryngeal mask according to claim 10, characterised in that the first hose (152) comprises a first corrugated section (15210) and first ribs (15211) extending along the length direction of the first corrugated section (15210), the inner wall of the first corrugated section (15210) is of a smooth structure, the thickness of the first ribs (15211) is larger than the corresponding thickness at the troughs of the first corrugated section (15210);

the second hose (151) comprises a second corrugated section (1510) and second ribs (1511) extending along the length direction of the second corrugated section (1510), the inner wall of the second corrugated section (1510) is of a smooth structure, and the thickness of the second ribs (1511) is greater than the corresponding thickness of the troughs of the second corrugated section (1510).

12. A laryngeal mask according to claim 11, characterised in that the neutral layer of the first hose (152) and the neutral layer of the second hose (151) are in the same neutral layer plane, the first ribs (15211) and the second ribs (1511) being in the neutral layer plane.

13. The laryngeal mask according to claim 8, characterised in that the distal end of the light guide (11) is exposed in the space inside the sealing seat (13), the distal end of the light guide (11) being glued to the first hose (152).

14. A laryngeal mask according to any one of claims 8-13, characterised in that the distal end of the image tube (23) is capable of bringing the light guide (11) to bend and reposition simultaneously.

15. A laryngeal mask according to claim 8, characterised in that the distal end of the light guide (11) is fixedly connected to the sealing seat (13).

16. The laryngeal mask according to claim 1, characterised in that the viewing tube (23) comprises in sequence, from the proximal end to the distal end of the viewing tube (23), a main body section (232), a snake bone section (233) and a viewing section (234), the image sensor (231) being arranged at the distal end of the viewing section (234), at least part of the snake bone section (233) being located in the sealing seat (13), the distal end of the viewing tube (23) being bent and repositioned by means of the snake bone section (233).

17. The laryngeal mask according to claim 16, wherein the control portion (22) comprises a first steel wire (223), a second steel wire (224) and a power assembly (222), the first steel wire (223) and the second steel wire (224) are arranged in the visual tube (23) in a penetrating mode, a proximal end of the first steel wire (223) and a proximal end of the second steel wire (224) are respectively in driving connection with the power assembly (222), a distal end of the first steel wire (223) is connected with an inner top of a distal end of the snake bone segment (233), a distal end of the second steel wire (224) is connected with an inner bottom of a distal end of the snake bone segment (233), and the first steel wire (223) and the second steel wire (224) drive the snake bone segment (233) to bend upwards and reset under the driving of the power assembly (222).