CN114082060A

CN114082060A - Intubation device capable of being used for difficult airway independently or in cooperation with fiber bronchoscope

Info

Publication number: CN114082060A
Application number: CN202111354733.1A
Authority: CN
Inventors: 蔺琳; 罗和国
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-25

Abstract

The invention provides an intubation device which can be used for difficult airways independently or in cooperation with a fiberbronchoscope, and comprises an insertion guide rail, wherein the insertion guide rail comprises a guide rail main body in the shape of a circular arc strip, and a T-shaped guide slot penetrating through two circumferential ends of the guide rail main body is formed in the circumferential extension of the outer arc surface of the guide rail main body; the guide rail main body is also provided with a video pore canal which runs through the two circumferential ends of the guide rail main body in a circumferential extending way, and a transparent lens is embedded in one port of the video pore canal; a tongue depressor is connected and arranged at one end of the guide rail main body corresponding to the embedded transparent lens, and an operating handle is fixedly arranged at the other circumferential end of the guide rail main body on the inner arc surface; and a guide marking line extending to two ends is carved on the groove bottom wall of the T-shaped guide slot. The whole thickness is small, and the device can be used on difficult airway patients under various conditions such as small opening degree and the like.

Description

Intubation device capable of being used for difficult airway independently or in cooperation with fiber bronchoscope

Technical Field

The invention relates to the technical field of medical endoscopes, in particular to a using device of an electronic video bronchoscope for tracheal intubation and laryngeal diagnosis and treatment, and particularly relates to an intubation device which can be used for difficult airways independently or in cooperation with a fiber bronchoscope.

Background

Since 1855 Spanish Kahesa invented the first laryngoscope in the world, various new laryngoscopes have emerged. With the development of the technology, Glidescope video laryngoscope was invented by Saturn company in Canada in 2001, so that the tracheal intubation or the laryngeal diagnosis and treatment method is revolutionarily changed. Therefore, the video laryngoscope is rapidly popularized and applied all over the world. In medical clinic, before an anesthesiologist uses an anesthesia machine, a breathing machine and other equipment for a patient, the patient is generally required to be subjected to tracheal intubation, namely, a tracheal catheter for connecting the equipment is inserted into the trachea of the patient. When the trachea is intubated, the trachea is required to be supported by intubation equipment, and the common equipment mainly comprises an electronic video laryngoscope. After the physician exposes the glottis of the body with the laryngoscope, the endotracheal tube is inserted behind the glottis. For most conventional laryngoscopes, the laryngoscope blade is directly attached to the handle and serves as the primary component of the laryngoscope, serving the primary support function and the function of directing or generating illumination light.

However, since the existing laryngoscope and the various structural parameters of the laryngoscope lens used in cooperation with the existing laryngoscope are developed according to the anatomical structure characteristics of the upper respiratory tract of the ordinary person, the same video laryngoscope is applied to patients with difficult airways such as narrow pharynx, small opening degree, incapability of bending back and the like, and the clinical practicability, safety and reliability of the laryngoscope are greatly reduced. Because the mouth opening degree of the difficult airway patient is limited, the size of the visual laryngoscope and the laryngoscope lens used by the visual laryngoscope is relatively large, and the curvature is also large, the laryngoscope cannot pass through the tongue root and pick up the epiglottis, even the visual laryngoscope can not be placed into the mouth even if the visual laryngoscope meets some patients with limited opening degree, or the visual laryngoscope can not expose the glottis and the epiglottis even if the visual laryngoscope is placed into the mouth, so that the video laryngoscope which is widely used at present cannot be satisfactorily applied to the tracheal intubation and the laryngeal diagnosis and treatment of the difficult airway patient.

Disclosure of Invention

The invention aims to provide an intubation device which can be used for a difficult airway independently or in combination with a fiber bronchoscope, and the intubation device aims to solve the technical problems that: for patients with narrow oropharynx, small mouth opening degree and limited backward bending, the patient can only be intubated from the oral cavity if the fiber bronchoscope (such as patients with nasopharyngeal carcinoma or patients with nasal blood blades or patients with nasal mucosa easy damage and bleeding) or the tracheal catheter can not be inserted from the nasopharynx, the traditional visual laryngoscope and the laryngoscope lens matched with the traditional visual laryngoscope have relatively large size and large curvature, so that the laryngoscope lens can not pass through the root of the tongue, pick up the epiglottis, even touch some patients with limited mouth opening degree, the visual laryngoscope can not be placed in the oral cavity, or the glottis and the epiglottis can not be exposed in the oral cavity, the airway can only be established through difficult airway tools of the fiber bronchoscope class, but the patients with limited backward bending, particularly the patients, because the fiber bronchoscope is soft and free of force, the glottis and the epiglottis can not be exposed, slipping into the esophagus very often, resulting in cannula failure.

In order to solve the technical problems, the invention provides an intubation device which can be used for a difficult airway independently or in cooperation with a fiberbronchoscope, and the intubation device comprises an insertion guide rail, wherein the insertion guide rail comprises a guide rail main body in the shape of a circular arc sheet strip, and a T-shaped guide slot penetrating through two circumferential ends of the guide rail main body is formed in the outer arc surface of the guide rail main body in a circumferential extending manner;

the guide rail main body is also provided with a video pore canal which runs through the two circumferential ends of the guide rail main body in a circumferential extending manner, the video pore canal is arranged on the guide rail main body in parallel with the T-shaped guide slot along the axial direction, and a transparent lens is embedded in one port of the video pore canal;

a tongue depressor is connected to one end of the guide rail main body corresponding to the embedded transparent lens, the thickness of the tongue depressor is the same as the thickness of the groove bottom wall of the guide rail main body corresponding to the bottom of the T-shaped guide slot, and an operating handle is fixedly arranged at the other circumferential end of the guide rail main body on the inner arc surface;

and a guide marking line extending to two ends is carved on the groove bottom wall of the T-shaped guide slot.

The central axis of the operating handle is perpendicular to the chord line of the guide rail main body.

Preferably: also comprises an insertion guide pipe, the insertion guide pipe comprises a pipe body which is bent into a circular arc section shape and a circular arc insertion plate which is correspondingly positioned at the radial inner side of the circular arc of the pipe body and is integrally connected, the two sides of the arc-shaped inserting plate corresponding to the axial direction respectively protrude out of the pipe body, the outer contour of the cross section of the inserting guide pipe is in a T shape, the inner diameter of the circular arc on the circular arc insertion plate is matched with the outer diameter of the circular arc at the bottom of the T-shaped guide slot on the guide rail main body, the cross section outline of the circular arc-shaped inserting plate is matched with the shape and the size of the cross section outline of the T-shaped guide slot, the width of the pipe body in the axial direction is matched with the width of the notch of the T-shaped guide slot in the axial direction, the insertion guide pipe is detachably inserted into the T-shaped guide slot, and the arc length of the pipe body is larger than that of the guide rail main body.

Preferably: the integral contour of the inner pipe hole of the pipe body is square, the pipe wall, corresponding to the radial outer side of the circular arc, on the pipe body is composed of two flexible blocking pieces with overlapped edges, one side edge, opposite to each other, of each flexible blocking piece is connected to the pipe body and corresponds to the pipe wall on two axial sides, the two flexible blocking pieces are connected to one side edge, corresponding to the radial outer side of the circular arc, on the corresponding pipe wall respectively, the two flexible blocking pieces are perpendicular to the corresponding pipe wall respectively, the length of the two flexible blocking pieces is matched with that of the pipe body, and the width of the two flexible blocking pieces is smaller than the width, corresponding to the pipe wall on two axial sides, of the pipe body and is larger than one half of the width between the pipe walls on the two axial sides.

Preferably: an inclined guide surface is arranged at one end of the guide rail main body, which is connected with the tongue depressor, an insertion end surface matched with the inclined angle of the guide surface is also arranged at the corresponding end of the insertion guide pipe, limit stops are arranged at two sides of the other end of the insertion guide pipe, which corresponds to the insertion end surface, and the limit stops abut against one end of the guide rail main body, which is provided with the operating handle, so that the insertion end surface and the guide surface are on the same plane; the outer surface edges and corners of the guide rail main body and the inserted guide pipe are provided with rounded corner structures.

Preferably: the tongue depressor is correspondingly of a structure extending along the circumferential direction of the bottom wall of the groove at the bottom of the T-shaped guide slot on the guide rail main body, or the lower side surface of the tongue depressor is tangent to the inner arc surface of the guide rail main body.

Preferably: the tongue depressor is hinged at one circumferential end of the guide rail main body, one side of the guide rail main body close to the inner arc surface is provided with a threading hole, one end of the threading hole circumferentially extends to penetrate through one circumferential end of the guide rail main body, which is provided with the operating handle, the other end of the threading hole circumferentially extends to be close to one end hinged with the tongue depressor and then deflects to the radial inner side to penetrate out of the inner arc surface of the guide rail main body, a pull wire penetrates through the threading hole, one end of the pull wire is connected to the lower side surface of the tongue depressor and deviates from a hinged shaft between the tongue depressor and the guide rail main body, the operating handle is provided with an L-shaped pull wire deflector rod, the corner part of the L-shaped pull wire deflector rod is hinged at one side of the operating handle, and the other end of the pull wire is connected to one end of a short arm on the L-shaped pull wire deflector rod, a clamp combining structure is formed between the long arm on the L-shaped stay wire deflector rod and the operating handle.

Preferably: the lower side surface of the tongue depressor is connected with a flexible covering sheet which is attached to the lower side surface of the tongue depressor, and a connection point between the pull wire and the tongue depressor, a hinge gap between the tongue depressor and the guide rail main body and a penetrating hole formed by the threading hole on the inner arc surface of the guide rail main body are covered under the flexible covering sheet.

Preferably: the width of the guide rail main body in the axial direction is 10-20mm, the radial thickness of the guide rail main body is 3-6mm, the chord length of the guide rail main body is 70-140mm, the arch height of the guide rail main body is 8-20mm, the arc length of the insertion guide pipe exceeds the arc length of the guide rail main body by more than 30mm, the width of a notch of the T-shaped guide slot in the axial direction is 4-11mm, the thickness of the bottom wall of the groove of the guide rail main body corresponding to the T-shaped guide slot is 1-2mm, the aperture of the video pore channel is 2-4mm, the radial thickness of the insertion guide pipe is the same as the width of the notch of the T-shaped guide slot in the axial direction, and the side length of the square inner pipe hole in the pipe body is 3-9 mm.

Preferably, still include a video soft mirror, the video soft mirror is including controlling display screen, soft mirror main part and the video probe that connects gradually, the video probe accessible the video pore, the video probe comprises a camera and a light source, the external diameter of video probe is 2-4mm, the telescopic of video probe inserts and establishes in the video pore.

Compared with the prior art, the invention has the beneficial effects that:

1. the whole thickness is small, and the mask can be used on various patients with difficult airways, such as patients with limited opening degree and patients with limited backward bending;

2. the video pore channel can be used by inserting a matched video soft lens or a traditional laryngoscope, the T-shaped guide slot inserted into the guide rail can be independently matched with a tracheal cannula for use, and can also be matched with a fiber bronchoscope for use under the guidance of the T-shaped guide slot and the guide marking at the bottom of the slot, so that the structure is lighter and thinner, and the use mode is more flexible and diversified;

3. the insertion guide tube can provide a guide channel for the fiberoptic bronchoscope or the tracheal intubation, and after the fiberoptic bronchoscope enters the place near the epiglottis and exposes the glottis, the fiberoptic bronchoscope can break through the two flexible blocking pieces and break away from the inner tube hole of the tube body, so that the insertion guide tube is separated and drawn out from the insertion guide rail and then inserted into the tracheal intubation, and the use is convenient and fast, and the operation is flexible;

4. the tongue depressor can be controlled to hook inwards through the pulling wire deflector rod on the operating handle in a linkage mode, and the glottis of a patient can be exposed beneficially.

The action of inserting the tracheal cannula can be divided into two steps, firstly, the guide rail main body is inserted, the tongue root part of the tongue can be lifted by the tongue depressor at the front end of the guide rail main body, a channel is opened to expose the epiglottis or part of the epiglottis, then the fiberoptic bronchoscope is inserted near the epiglottis under the guidance of the insertion catheter, the fiberoptic bronchoscope can be prevented from sliding into the esophagus, the glottis can be exposed smoothly, then the insertion catheter is drawn out, and the tracheal cannula is inserted; for some patients with glottis exposed by inserting the guide rail body, a tracheal cannula can be inserted directly under the guidance of the T-shaped guide slot.

Drawings

Fig. 1 is a schematic perspective view of an insertion rail according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structural diagram of a first embodiment of the present invention.

Fig. 3 is a schematic perspective exploded view of a second embodiment of the present invention.

Fig. 4 is a schematic perspective view of an assembled state according to a second embodiment of the present invention.

Fig. 5 is a cross-sectional view schematically showing the assembled state of the insertion rail and the insertion tube according to the present invention.

Fig. 6 is a schematic view of the video soft lens structure of the present invention.

Fig. 7 is a schematic sectional view of the combination of the insertion guide rail and the soft video mirror according to the present invention.

Fig. 8 is a schematic view of the hinge structure of the tongue depressor and the guide rail main body.

Fig. 9 is a schematic partial sectional structure diagram of a third embodiment of the present invention.

Detailed Description

An intubation device for a difficult airway, alone or in conjunction with a fiberoptic bronchoscope, according to the present invention will be described in more detail with reference to the accompanying fig. 1-9 and preferred embodiments.

The first embodiment is as follows: as shown in fig. 1-2, an intubation device that can be used alone for a difficult airway includes an insertion guide rail 1, where the insertion guide rail 1 includes a guide rail body 11 in the shape of an arc strip, the width of the guide rail body 11 in the axial direction is 12mm, the radial thickness of the guide rail body 11 is 4mm, a T-shaped guide slot 12 having two ends respectively penetrating through two ends of the guide rail body 11 in the circumferential direction is formed in a circumferential direction on an outer arc surface of the guide rail body 11, the width of a slot bottom of the T-shaped guide slot 12 is 7.5mm, the width of a slot opening of the T-shaped guide slot in the axial direction is 5.5mm, a video duct 14 penetrating through two ends of the guide rail body 11 in the circumferential direction is further formed in the guide rail body 11 in the circumferential direction, the video duct 14 is axially juxtaposed with the T-shaped guide slot 12 on the guide rail body 11, a transparent lens 141 is embedded in one port of the video pore channel 14, and the inner diameter of the video pore channel 14 is 3 mm; the tongue depressor is connected to one end of the guide rail main body 11 corresponding to the embedded transparent lens, the thickness of the tongue depressor 3 is equal to the thickness of the groove bottom wall of the guide rail main body 11 corresponding to the bottom of the T-shaped guide slot 12 and is 1.5mm, the tongue depressor 3 corresponds to a structure of the guide rail main body 11 corresponding to the circumferential extension of the groove bottom wall of the bottom of the T-shaped guide slot 12, or the lower side surface of the tongue depressor 3 is tangent to the inner arc surface of the guide rail main body 11 to form a downward hook structure, an operating handle 13 is fixedly arranged on the inner arc surface of the other circumferential end of the guide rail main body 11, and the central axis of the operating handle 13 is perpendicular to the chord line of the guide rail main body 11.

In the specific implementation of the embodiment, as shown in fig. 1, 2 and 7, the insertion guide rail 1 can be used with the soft video lens 4 shown in fig. 8 alone for tracheal intubation, firstly, the soft video lens 4 or other laryngoscope matching the video tunnel 14 is inserted into the video tunnel 14, the operation handle 13 is operated to insert the guide rail body 11 into the patient's mouth, the tip of the epiglottis is reached under the visual guidance of the soft video lens 4 or laryngoscope, the glottis is exposed, and then the tracheal intubation is inserted into the trachea along the T-shaped guide slot.

Example two: as shown in fig. 1 to 7, an intubation device for difficult airway cooperating with a bronchofiberscope includes an insertion guide rail 1 and an insertion catheter 2, the insertion guide rail 1 includes a guide rail body 11 in the shape of a circular arc strip, the width of the guide rail body 11 in the axial direction is 12mm, the radial thickness of the guide rail body 11 is 4mm, a T-shaped guide slot 12 having two ends respectively penetrating through two ends of the guide rail body 11 in the circumferential direction is circumferentially extended on an outer arc surface of the guide rail body 11, the width of a slot bottom of the T-shaped guide slot 12 is 7.5mm, the width of a slot opening of the T-shaped guide slot in the axial direction is 5.5mm, a video duct 14 penetrating through two ends of the guide rail body 11 in the circumferential direction is further circumferentially extended on the guide rail body 11, and the video duct 14 is axially juxtaposed with the T-shaped guide slot 12 on the guide rail body 11, a transparent lens 141 is embedded in one port of the video pore channel 14, and the inner diameter of the video pore channel 14 is 3 mm; a tongue depressor 3 is connected and arranged at one end of the guide rail main body 11 corresponding to the embedded transparent lens, the thickness of the tongue depressor 3 is the same as the thickness of the groove bottom wall of the T-shaped guide slot 12 on the guide rail main body 11, and is 1.5mm, the tongue depressor 3 is a structure extending along the circumferential direction of the groove bottom wall of the guide rail main body 11 corresponding to the bottom of the T-shaped guide slot 12, or the lower side surface of the tongue depressor 3 is tangent to the inner arc surface of the guide rail main body 11, thereby forming a downward hooked structure, a guide marking 121 extending to two ends is carved on the groove bottom wall of the T-shaped guide slot 12, the guide marking 121 is preferably blue to be easily identified in the oral cavity, and the other circumferential end of the guide rail body 11 is fixedly provided with an operating handle 13 on the inner arc surface, and the central axis of the operating handle 13 is perpendicular to the chord line of the guide rail body 11;

the insertion guide pipe 2 comprises a pipe body 21 which is bent to be in a circular arc section shape and a circular arc insertion plate 22 which is correspondingly located on the radial inner side of a circular arc of the pipe body 21 and is integrally formed and connected, the circular arc insertion plate 22 protrudes out of the pipe body 21 correspondingly on two sides in the axial direction, the protruding length is 1mm, the outer contour of the cross section of the insertion guide pipe 2 is in a T shape, the inner diameter of a circular arc on the circular arc insertion plate 22 is matched with the outer diameter of a circular arc on the bottom of the T-shaped guide slot 12 on the guide rail main body 11, the outer contour of the cross section of the circular arc insertion plate 22 is matched with the shape and the size of the cross section contour of the T-shaped guide slot 12, the thickness of the circular arc insertion plate 22 is 1mm, the pipe body 21 is matched with the width of the T-shaped guide slot 12 in the axial direction correspondingly to the width of the axial direction, and the insertion guide pipe 2 is 5.5mm in the radial direction correspondingly, the insertion catheter 2 is detachably inserted into the T-shaped guide slot 12, the arc length of the tube body 21 exceeds the arc length of the guide rail main body 11 by more than 30mm, and the extended part is convenient for medical staff to hold the insertion catheter 2.

In the specific implementation process of the embodiment, after the guide rail main body 11 is inserted alone, in the case that the tip of the epiglottis can be exposed under the observation of the soft video lens 4 or laryngoscope, the bronchofiberscope can be inserted from the T-shaped guide slot 12, the bronchofiberscope can enter the vicinity of the epiglottis to expose the glottis under the guidance of the guide marking 121, and then the tracheal cannula is inserted into the trachea along the T-shaped guide slot 12 and under the observation of the bronchofiberscope; when the backward bending degree of the patient is limited and is blocked by the tongue root and the fiberbronchoscope cannot pass through the inserting tube 2, the inserting tube 2 is inserted into the T-shaped guiding slot 12, the tube body 21 of the inserting tube 2 can jack up the tongue body, the inner tube hole 23 of the inserting tube forms a channel, the fiberbronchoscope can be inserted to the position near the epiglottis through the inner tube hole 23 to avoid sliding into the esophagus and expose the glottis, and then the inserting tube 2 can be pulled out to be inserted into the tracheal cannula.

Example three: as shown in fig. 8-9, based on the first and second embodiments, the tongue depressor 3 is hinged at one circumferential end of the guide rail body 11, a threading hole 15 is formed in one side of the guide rail body 11 close to the inner arc surface, the inner diameter of the threading hole 15 is 0.5mm, one end of the threading hole 15 extends circumferentially to penetrate through one circumferential end of the guide rail body 11 where the operating handle 13 is arranged, the other end of the threading hole 15 extends circumferentially to be close to one end hinged with the tongue depressor 3 and then deflects radially inwards to penetrate through the inner arc surface of the guide rail body 11, a pull wire 31 is inserted in the threading hole 15, the diameter of the pull wire 31 is matched with the threading hole 15, the pull wire 31 is preferably a steel wire, one end of the pull wire 31 is connected to the lower side surface of the tongue depressor 3 and deviates from a hinge shaft 32 between the tongue depressor 3 and the guide rail body 11, an L-shaped stay wire shift lever 33 is arranged on the operating handle 13, a corner part of the L-shaped stay wire shift lever 33 is hinged to one side of the operating handle 13, the other end of the stay wire 31 is connected to the L-shaped stay wire shift lever 33 and is positioned at one end of a short arm 331, and a clamp closing structure is formed between a long arm 332 on the L-shaped stay wire shift lever 33 and the operating handle 13;

a flexible covering sheet 34 is connected to the lower side surface of the tongue depressor 3, the flexible covering sheet 34 may be a sheet made of rubber or latex, the flexible covering sheet 34 is attached to the lower side surface of the tongue depressor 3, and a connection point between the pull wire 31 and the tongue depressor 3, a hinge gap between the tongue depressor 3 and the guide rail body 11, and a through hole formed in the inner arc surface of the guide rail body 11 by the threading hole 15 are all covered under the flexible covering sheet 34, so that when the pull wire 31 is pulled by a force on the tongue depressor 3, a taut string formed between the tongue depressor 3 and the guide rail body 11 by the pull wire 31 can be shielded by the flexible covering sheet 34, and the flesh tissue of the throat part of the patient cannot be cut.

In the specific implementation process of the embodiment, the pulling wire 31 can be pulled by the pulling wire deflector rod 33, so that the tongue depressor 3 is linked to hook downwards, and the glottis is exposed smoothly.

Further, as shown in fig. 3, 4, and 5, in the above embodiment, the overall contour of the inner pipe hole 23 of the pipe body 21 is square, the side length of the inner pipe hole is 3.5mm, the pipe wall of the pipe body 21 corresponding to the radial outer side of the circular arc is composed of two flexible blocking pieces 24 with overlapped edges, one opposite side edge of the two flexible blocking pieces 24 is respectively connected to the pipe walls of the pipe body 21 corresponding to the two axial sides, the two flexible blocking pieces 24 are respectively connected to one side edge of the corresponding pipe wall corresponding to the radial outer side of the circular arc, the two flexible blocking pieces 24 are respectively perpendicular to the corresponding pipe walls, the length of the two flexible blocking pieces 24 is adapted to the length of the pipe body 21, the width of each of the two flexible blocking pieces 24 is smaller than the width of the pipe body 21 corresponding to the width between the two axial side pipe walls and is larger than one half of the width between the two side pipe walls, the thickness of the two flexible baffle sheets 24 is 0.2-0.5 mm. The semi-open structure of the inner tube hole 23 can break through two flexible blocking sheets 24 radially and separate from the inner tube hole 23 of the tube body 21 after the fiberbronchoscope or the endotracheal tube reaches the preset position, so that the insertion catheter 2 can be used as a sheath tube, and can be separated and drawn out from the insertion guide rail 1 after the corresponding work content is completed, and the use is convenient and the operation is flexible.

As shown in fig. 1, 2, 4, 8, and 9, an inclined guide surface 16 is provided at one end of the guide rail body 11 where the tongue depressor 3 is connected and provided, an insertion end surface 25 matched with the inclination angle of the guide surface 16 is also provided at the corresponding end of the insertion tube 2, a limit stop 26 (shown in fig. 2 and 6) is provided at both sides of the other end of the insertion tube 2 corresponding to the insertion end surface 25, and the limit stop 26 abuts against the end of the guide rail body 11 where the operating handle 13 is provided, so that the insertion end surface 25 and the guide surface 16 are on the same plane, and a wedge-headed insertion structure is formed; the outer surface edges and corners of the guide rail main body 11 and the insertion guide pipe 2 are both provided with a fillet structure, so that the edges and corners are prevented from hurting or scratching the tissues of the oral cavity and the throat of a patient.

As shown in fig. 6 and 7, the soft video lens 4 is further included, the soft video lens 4 includes a control display screen 41, a soft lens main body 42 and a video probe 43 which are sequentially connected, the video probe 43 can pass through the video duct 14, the video probe 43 is composed of a camera 431 and a light source 432, the outer diameter of the video probe 43 is 2.4mm, and the video probe 43 can be inserted into the video duct 14 in an extractable manner.

In summary, the technical solutions of the present invention can fully and effectively achieve the above objects, and the structural principles and functional principles of the present invention have been fully verified in the embodiments to achieve the intended effects and objectives, and the embodiments of the present invention can be modified according to these principles, so that the present invention includes all the alternatives within the scope of the claims. Any equivalent variations that fall within the scope of the claims of the present invention are intended to be covered by the claims.

Claims

1. An intubation device for difficult airways, alone or in combination with a fiberoptic bronchoscope, wherein: the guide rail comprises an insertion guide rail, wherein the insertion guide rail comprises a guide rail main body in the shape of an arc strip, and a T-shaped guide slot penetrating through two circumferential ends of the guide rail main body is formed in the outer arc surface of the guide rail main body in a circumferential extending mode;

2. The intubation device according to claim 1, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: also comprises an insertion guide pipe, the insertion guide pipe comprises a pipe body which is bent into a circular arc section shape and a circular arc insertion plate which is correspondingly positioned at the radial inner side of the circular arc of the pipe body and is integrally connected, the two sides of the arc-shaped inserting plate corresponding to the axial direction respectively protrude out of the pipe body, the outer contour of the cross section of the inserting guide pipe is in a T shape, the inner diameter of the circular arc on the circular arc insertion plate is matched with the outer diameter of the circular arc at the bottom of the T-shaped guide slot on the guide rail main body, the cross section outline of the circular arc-shaped inserting plate is matched with the shape and the size of the cross section outline of the T-shaped guide slot, the width of the pipe body in the axial direction is matched with the width of the notch of the T-shaped guide slot in the axial direction, the insertion guide pipe is detachably inserted into the T-shaped guide slot, and the arc length of the pipe body is larger than that of the guide rail main body.

3. The intubation device according to claim 2, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: the integral contour of the inner pipe hole of the pipe body is square, the pipe wall, corresponding to the radial outer side of the circular arc, on the pipe body is composed of two flexible blocking pieces with overlapped edges, one side edge, opposite to each other, of each flexible blocking piece is connected to the pipe body and corresponds to the pipe wall on two axial sides, the two flexible blocking pieces are connected to one side edge, corresponding to the radial outer side of the circular arc, on the corresponding pipe wall respectively, the two flexible blocking pieces are perpendicular to the corresponding pipe wall respectively, the length of the two flexible blocking pieces is matched with that of the pipe body, and the width of the two flexible blocking pieces is smaller than the width, corresponding to the pipe wall on two axial sides, of the pipe body and is larger than one half of the width between the pipe walls on the two axial sides.

4. Intubation device according to any one of claims 2 to 3, which can be used alone or in combination with a fiberoptic bronchoscope for difficult airways, characterized in that: an inclined guide surface is arranged at one end of the guide rail main body, which is connected with the tongue depressor, an insertion end surface matched with the inclined angle of the guide surface is also arranged at the corresponding end of the insertion guide pipe, limit stops are arranged at two sides of the other end of the insertion guide pipe, which corresponds to the insertion end surface, and the limit stops abut against one end of the guide rail main body, which is provided with the operating handle, so that the insertion end surface and the guide surface are on the same plane; the outer surface edges and corners of the guide rail main body and the inserted guide pipe are provided with rounded corner structures.

5. The intubation device according to claim 4, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: the tongue depressor is correspondingly of a structure extending along the circumferential direction of the bottom wall of the groove at the bottom of the T-shaped guide slot on the guide rail main body, or the lower side surface of the tongue depressor is tangent to the inner arc surface of the guide rail main body.

6. Intubation device according to any of claims 1, 2, 3, 5, alone or in combination with a fiberoptic bronchoscope, for difficult airways, wherein: the tongue depressor is hinged at one circumferential end of the guide rail main body, one side of the guide rail main body close to the inner arc surface is provided with a threading hole, one end of the threading hole circumferentially extends to penetrate through one circumferential end of the guide rail main body, which is provided with the operating handle, the other end of the threading hole circumferentially extends to be close to one end hinged with the tongue depressor and then deflects to the radial inner side to penetrate out of the inner arc surface of the guide rail main body, a pull wire penetrates through the threading hole, one end of the pull wire is connected to the lower side surface of the tongue depressor and deviates from a hinged shaft between the tongue depressor and the guide rail main body, the operating handle is provided with an L-shaped pull wire deflector rod, the corner part of the L-shaped pull wire deflector rod is hinged at one side of the operating handle, and the other end of the pull wire is connected to one end of a short arm on the L-shaped pull wire deflector rod, a clamp combining structure is formed between the long arm on the L-shaped stay wire deflector rod and the operating handle.

7. The intubation device according to claim 6, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: the lower side surface of the tongue depressor is connected with a flexible covering sheet which is attached to the lower side surface of the tongue depressor, and a connection point between the pull wire and the tongue depressor, a hinge gap between the tongue depressor and the guide rail main body and a penetrating hole formed by the threading hole on the inner arc surface of the guide rail main body are covered under the flexible covering sheet.

8. The intubation device according to claim 7, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: the width of the guide rail main body in the axial direction is 10-20mm, the radial thickness of the guide rail main body is 3-6mm, the chord length of the guide rail main body is 70-140mm, the arch height of the guide rail main body is 8-20mm, the arc length of the insertion guide pipe exceeds the arc length of the guide rail main body by more than 30mm, the width of a notch of the T-shaped guide slot in the axial direction is 4-11mm, the thickness of the bottom wall of the groove of the guide rail main body corresponding to the T-shaped guide slot is 1-2mm, the aperture of the video pore channel is 2-4mm, the radial thickness of the insertion guide pipe is the same as the width of the notch of the T-shaped guide slot in the axial direction, and the side length of the square inner pipe hole in the pipe body is 3-9 mm.

9. The intubation device according to claim 8, wherein said tube is adapted to be used alone or in combination with a bronchofiberscope for difficult airways: still include a video soft mirror, the soft mirror of video is including controlling display screen, soft mirror main part and video probe, the video probe accessible the video pore, video probe comprises a camera and a light source, video probe's external diameter is 2-4 mm.