Guiding type laryngoscope

Abstract

The guide type laryngoscope comprises a holding part, a bending part and a tongue lifting part, the bending part is connected with one end of the holding part, a guide groove used for guiding an intubation tube is formed in the bending part, one end of the tongue lifting part is connected to the end, away from the holding part, of the bending part, and the other end of the tongue lifting part is connected to the other end of the bending part. The other end of the tongue lifting part extends in the bending direction of the bending part on the side face, facing one side of the holding part, of the tongue lifting part; the guide groove is provided with a pipe inlet end and a pipe outlet end, and a first included angle between the extension line of the pipe outlet end and the central axis of the holding part is smaller than a second included angle between the extension line of the tail end of the tongue lifting part and the central axis of the holding part. The angle of the cannula sinking due to gravity after leaving the guide groove can be corrected, the angle of the cannula directly entering the observation glottis through the guide groove is met, and airway management is carried out.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a guided laryngoscope. Background Art

[0002] A laryngoscope is a type of endoscope used in the medical device field, generally for guiding endotracheal intubation. Currently, when using existing laryngoscopes for intubation guidance, doctors often need to hold the laryngoscope and adjust its position multiple times after it enters the mouth to successfully expose the glottis or perform intubation. This is especially true for doctors with less intubation experience, requiring even more adjustments. Excessive adjustments can lead to strong irritation of the larynx, making intubation more difficult and potentially damaging the pharyngeal mucosa and the patient's teeth.

[0003] Therefore, minimizing the adjustment movements required by doctors during the use of a laryngoscope has become an urgent technical problem to be solved. Summary of the Invention

[0004] This application provides a guided laryngoscope that at least solves the technical problem of how to reduce the adjustment movements of doctors during the use of the laryngoscope in related technologies.

[0005] This application provides a guided laryngoscope, comprising: a gripping part, a curved part, and a tongue-lifting part, wherein the curved part is connected to one end of the gripping part, the curved part has a guide groove for guiding the intubation tube, one end of the tongue-lifting part is connected to the end of the curved part away from the gripping part and on the side facing the gripping part, and the other end of the tongue-lifting part extends along the curvature direction of the curved part; the guide groove has an inlet end and an outlet end, and the first angle between the extension line of the outlet end and the central axis of the gripping part is smaller than the second angle between the extension line of the end of the tongue-lifting part and the central axis of the gripping part.

[0006] Optionally, a difference between the second angle and the first angle is greater than 0° and less than or equal to 4°.

[0007] Optionally, the first angle is 75° to 77°.

[0008] Optionally, the gripping part is tilted toward the tongue-lifting part.

[0009] Optionally, the guide-type laryngoscope further comprises: an intubation tube positioning portion, which is arranged at the tube entry end of the guide groove, and the intubation tube positioning portion protrudes toward the direction away from the gripping portion.

[0010] Optionally, the guide laryngoscope further includes a cannula positioning part, which extends along the extension line of the cannula outlet end at the guide groove.

[0011] Optionally, the guided laryngoscope further comprises: a camera, which is arranged on one side of the tube outlet end of the guide groove, and the central axis of the camera's viewing angle is inclined toward the direction of the tube movement axis after the tube extends along the tube outlet end of the guide groove.

[0012] Optionally, a first distance between the gripping portion and an intersection of a central axis of the camera's viewing angle and the cannula's movement axis is adapted to a second distance between the incisors and the glottis.

[0013] Optionally, the angle between the central axis of the camera and the cannula movement axis is 7° to 10°.

[0014] Optionally, the first distance is the sum of the distance between the intersection point and the end of the tongue and the distance between the end of the tongue and the gripping part.

[0015] This application has at least the following beneficial effects: The guided laryngoscope includes a handle, a curved section, and a tongue levator. The curved section is connected to one end of the handle. The curved section has a guide groove for accommodating the movement of the endotracheal tube and guiding it into the glottis. The tongue levator is used to lift the patient's epiglottis to expose the glottis, guiding medical personnel to accurately perform airway intubation. One end of the tongue levator is connected to the side of the curved section facing away from the handle, and the other end of the tongue levator extends along the curvature of the curved section. The handle serves as the laryngoscope's handle, and the handle is connected to the tongue levator via a large-angle elliptical curved section. A separate cavity is created in the curved section as a guide groove for the endotracheal tube, allowing the tube to directly enter the airway along the guide groove, improving the operability of the guided laryngoscope. Simultaneously, the first angle between the extension line of the guide groove's exit end (away from the handle) and the central axis of the handle is smaller than the second angle between the extension line of the tongue levator's end (away from the handle) and the central axis of the handle. In other words, the direction of the end of the guide groove away from the gripping part is not parallel to the direction of the tongue lifter; the upward angle of the guide groove at the end away from the gripping part is greater than the upward angle of the tongue lifter at the end away from the gripping part. Therefore, this corrects the angle at which the intubation tube sinks due to gravity after leaving the guide groove, allowing the tube to directly enter the glottis for airway management. This is especially beneficial for inexperienced medical personnel who, after aligning the guide groove with the glottis for intubation, can directly enter the glottis without needing to adjust the laryngoscope or intubation angle, thus reducing adjustment operations.

[0016] Furthermore, the guided laryngoscope also includes a camera, positioned on one side of the outlet end of the guide groove. The central axis of the camera's field of view is tilted towards the direction of the insertion tube's movement axis after it extends along the outlet end of the guide groove. This allows the camera's field of view to be directed towards the insertion tube position, facilitating the guidance of the tube to the glottis and ensuring a high success rate for intubation.

[0017] Furthermore, the first distance between the intersection of the camera's viewing center axis and the insertion tube's movement axis and the gripping part is adapted to the second distance between the incisors and the glottis, so that the intersection of the camera's viewing center axis and the insertion tube's movement axis after the insertion tube extends along the guide groove falls exactly at the glottis position, that is, ensuring that the position where the insertion tube exits along the insertion tube channel guide groove is exactly at the glottis position observed in the view. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic diagram of an exemplary structure of a guided laryngoscope according to an embodiment of the present application; Figure 2 This is a schematic diagram illustrating the position and relationship of the first included angle and the second included angle as described in the embodiments of this application; Figure 3 This is a schematic diagram of an exemplary structure of another guided laryngoscope described in an embodiment of this application; Figure 4 Schematic diagram of the positional relationship between the central axis of the camera's viewing angle and the intubation movement axis described in an embodiment of the present application. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] This application provides a guided laryngoscope, such as Figure 1 As shown, the guided laryngoscope includes a handle 1, a curved section, and a tongue levator 3. The curved section is connected to one end of the handle 1. The curved section has a guide groove 2 for accommodating the movement of the endotracheal tube and guiding it into the glottis. The tongue levator 3 is used to expose the glottis to the patient's epiglottis, guiding medical personnel to accurately perform airway intubation. One end of the tongue levator 3 is connected to the side of the curved section away from the handle 1, facing the handle 1. The other end of the tongue levator 3 extends along the curvature of the curved section. The handle 1 serves as the handle of the laryngoscope, and the handle is connected to the tongue levator 3 via a curved section with a large-angle elliptical arc. A separate cavity is created in the curved section as the endotracheal tube guide groove 2, allowing the endotracheal tube to directly enter the airway along the guide groove 2, improving the operability of the guided laryngoscope.

[0024] During laryngoscope-guided intubation, because the intubation tube is flexible and there is a distance between the outlet end 22 of the guide groove 2 and the glottis, the tube may sink due to gravity after leaving the guide groove 2. This may require additional adjustment of the laryngoscope or intubation position to ensure smooth insertion of the tube after the guide groove 2 is aligned with the glottis. Therefore, in this embodiment, if... Figure 2As shown, the first angle α between the extension line of the guide groove 2 at the end away from the gripping part 1 (i.e., the outlet end 22 of the guide groove 2) and the central axis of the gripping part 1 is smaller than the second angle β between the extension line of the tongue-lifting part 3 at the end away from the gripping part 1 (i.e., the end of the tongue-lifting part 3) and the central axis of the gripping part 1. In other words, the orientation direction of the guide groove 2 at the end away from the gripping part 1 is not parallel to the orientation direction of the tongue-lifting part 3; the upward angle of the guide groove 2 at the end away from the gripping part 1 is greater than the upward angle of the tongue-lifting part 3 at the end away from the gripping part 1. Therefore, the angle at which the intubation tube sinks due to gravity after leaving the guide groove 2 can be corrected, allowing the intubation tube to directly enter the glottis through the guide groove 2 for airway management. This is especially useful for inexperienced medical staff who need to align the guide groove 2 with the glottis for intubation. Because the angle at which the tube sinks due to gravity after leaving the guide groove 2 is corrected, the intubation tube can directly enter the glottis without needing to adjust the laryngoscope angle or the intubation tube angle, thus reducing the need for adjustment.

[0025] In one embodiment, since the distance between the outlet end 22 of the guide groove 2 and the glottis is small, and the flexibility of the insertion tube is not particularly high, the difference between the second included angle β and the first included angle α is greater than 0° and less than or equal to 4°. That is, the guide groove 2 and the lifting tongue 3 only need to be non-parallel, and a small angle can be set to correct the angle at which the insertion tube sinks due to gravity after leaving the guide groove 2, thus satisfying the angle at which the insertion tube directly enters the glottis for observation through the guide groove 2.

[0026] Existing laryngoscopes are often L-shaped, with the angle between the tongue-lifting part 3 and the gripping part 1 typically ranging from 85° to 90°. The gripping part 1 is usually vertically positioned. For experienced doctors, a lifting motion is needed after the laryngoscope enters the oral cavity to achieve better glottal exposure. For less experienced doctors, more adjustments are required. Therefore, to achieve direct observation of the glottis with the laryngoscope and to quickly locate the glottis without additional lifting or other movements after the laryngoscope enters the oral cavity, in an optional embodiment, the first angle α is set to 75° to 77°. By setting this first angle α in conjunction with the angle difference between the first angle α and the second angle β, after the laryngoscope enters the oral cavity, the tube extending from the guide tube end 22 can often be directly aligned with the glottis without any additional movements.

[0027] In one embodiment, the grip 1 is tilted toward the tongue lift 3, that is, the grip 1 and the tongue lift 3 are close to each other and connected by a large-angle elliptical arc. The grip 1 is designed to tilt forward, so that when encountering patients with difficulty in exposing the glottis, the grip 1 can be tilted backward to increase the observation angle, satisfy the operability of the guided laryngoscope, and make the observation of the glottis reach the maximum exposure rate.

[0028] In one embodiment, if Figure 3The illustrated guided laryngoscope also includes a cannula positioning part 23, which is disposed at the inlet end 21 of the guide groove 2. Specifically, the cannula positioning part 23 is located at the opening of the guide groove 2 near the holding part 1, and it protrudes in the direction away from the holding part 1. This ensures that the guide groove 2 has sufficient space to allow the cannula to move smoothly while preventing it from detaching from the guide groove 2.

[0029] In one embodiment, if Figure 3 The guided laryngoscope also includes a tube guide 24, which extends from the outlet end 22 of the guide groove 2 along the extension line 221 of the guide groove 2. The extension of the tube guide 24 from the outlet end 22 of the guide groove 2 along the guide groove 2 enables overall positioning of the tube. This ensures that when the tube reaches the tube guide 24 along the guide groove 2, it is not affected by the curvature of the tube itself, and the tube guide 24 can guide the tube into the glottis along the observed trajectory.

[0030] In one embodiment, for ease of observation, the guiding laryngoscope can be a video-guided laryngoscope. The video laryngoscope allows clinicians to lift the patient's epiglottis to expose the glottis, guiding medical staff to accurately perform airway intubation. It can also be used to provide images for intraoral examination and treatment. After the laryngoscope is inserted into the larynx, the laryngeal structure can be clearly displayed on the screen, and the glottis can be clearly exposed, achieving the goal of accurate intubation.

[0031] In related technologies, the central axis 41 of the camera 4's field of view is often parallel to the axis of the cannula's movement in the guide slot 2, causing a certain deviation between the observation point and the cannula's position. During intubation, to observe the cannula's position, the laryngoscope needs to be moved, undoubtedly increasing unnecessary operations, especially for inexperienced doctors who may need to repeatedly observe the cannula's position before intubation. Therefore, in this embodiment, to achieve direct observation of the glottis with a video laryngoscope, and to ensure that the glottis can be quickly located without unnecessary lifting or pulling movements after the laryngoscope is directly inserted into the oral cavity, in this embodiment, such as... Figure 3 and Figure 4 As shown, the guided laryngoscope also includes a camera 4, which is disposed on one side of the outlet end 22 of the guide groove 2. The central axis 41 of the viewing angle of the camera 4 is inclined toward the direction of the insertion tube movement axis 5 after the insertion tube extends along the outlet end 22 of the guide groove 2. This allows the viewing angle of the camera 4 to be directed toward the insertion tube position, facilitating the guidance of the insertion tube to the glottis and ensuring a high success rate of insertion.

[0032] In one embodiment, if Figure 4As shown, the third angle γ between the central axis 41 of the viewing angle of the camera 4 and the intubation movement axis 5 is 7° to 10°, that is, the camera 4 flips 7° to 10° toward the guide groove 2 in the direction indicated by the arrow, so as to ensure that the intersection of the central axis 41 of the viewing angle of the camera 4 and the intubation movement axis 5 is located at the glottis. In this embodiment, the third angle γ between the central axis 41 of the viewing angle of the camera 4 and the intubation movement axis 5 can be adaptively adjusted based on the applicable population. For example, for different populations such as children, adults, and short mandibles, the angle of the third angle γ can be an adaptive angle of 7°, 8°, 9°, or 10°.

[0033] Furthermore, in order to ensure that the intersection of the central axis 41 of the viewing angle of the camera 4 and the cannula movement axis 5 after the cannula is extended along the tube outlet end 22 of the guide groove 2 falls exactly at the glottis position, that is, to ensure that the position where the cannula comes out along the cannula channel guide groove 2 is exactly at the glottis position observed in the view, in this embodiment, the first distance between the intersection of the central axis 41 of the viewing angle of the camera 4 and the cannula movement axis 5 and the holding part 1 is adapted to the second distance between the incisors and the glottis.

[0034] Generally, according to the human body structure, the second distance between the human incisors and the glottis is 130mm to 150mm, and the lower end of the grip 1 often rests on the incisors. Therefore, in this embodiment, the first distance between the intersection of the viewing angle center axis 41 of the camera 4 and the intubation movement axis 5 and the grip 1 is adapted to the second distance range, so that the laryngoscope can enter the posterior oral cavity. When the grip 1 rests on the incisors, the observation viewpoint can be locked at the entrance of the glottis. When the intubation tube moves along the guide groove 2 to the focal point of the viewing angle, the intubation tube can be guided to the glottis, thereby ensuring the success rate of intubation. In this embodiment, the first distance can be adaptively adjusted based on the applicable population. For example, the first distance can be adaptively adjusted for different populations such as children, adults, and those with short mandibles.

[0035] In one embodiment, the first distance may include two parts, the first part is the distance between the gripping portion 1 and the end point of the tongue-lifting portion 3, and the second part is the distance between the end of the tongue-lifting portion 3 and the intersection of the viewing angle center axis 41 of the camera 4 and the intubation movement axis 5; wherein, the first part of the distance is determined by the size of the laryngoscope. Therefore, after the first part of the distance is determined, the second part of the distance can be determined by adjusting the third angle γ between the center axis of the camera 4 and the intubation movement axis 5, so that the second part of the distance is within the second distance range or less than or equal to the second distance, so that when the intubation tube is guided along the guide groove 2 to the viewing angle focal point, the intubation tube can be guided to the glottis, thereby ensuring the success rate of intubation.

[0036] For example, the camera 4 of the laryngoscope is tilted and forms an angle with the guide groove 2. The central axis 41 of the camera 4 is in the middle of the grip 1 of the laryngoscope. At the same time, the distance between the intersection of the intubation movement axis 5 and the central axis 41 of the view is controlled to be about 50mm to 60mm from the end point of the tongue-lifting part 3. The distance between the grip 1 and the end point of the tongue-lifting part 3 is 70mm. According to the human body structure, the distance between the human incisors and the glottis is 130mm to 150mm. Therefore, the focal point of the view can be about 120mm to 130mm away from the handle. The angle design of the product can smoothly lock the observation point at the entrance of the glottis. When the intubation tube is guided along the guide groove 2 to the focal point of the view, the intubation tube can be guided to the glottis, thereby ensuring the success rate of intubation.

[0037] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A guided laryngoscope, characterized in that: include: A gripping portion, a bending portion and a tongue-lifting portion, wherein: The curved portion is connected to one end of the gripping portion, and a guide groove for guiding the cannula is provided in the curved portion. One end of the tongue-lifting portion is connected to one end of the curved portion away from the gripping portion and is on a side surface facing the gripping portion, and the other end of the tongue-lifting portion is extended along the bending direction of the curved portion. The guide groove has an inlet end and an outlet end, and a first angle between an extension line of the outlet end and the central axis of the gripping portion is smaller than a second angle between an extension line of the end of the tongue-lifting portion and the central axis of the gripping portion.

2. The guided laryngoscope according to claim 1, characterized in that: A difference between the second angle and the first angle is greater than 0° and less than or equal to 4°.

3. The guided laryngoscope according to claim 1, characterized in that: The first angle is 75° to 77°.

4. The guiding laryngoscope according to claim 1, characterized in that: The gripping portion is inclined toward the tongue-lifting portion.

5. The guiding laryngoscope according to claim 1, characterized in that: Also includes: The insertion tube positioning portion is arranged at the tube entry end of the guide groove, and the insertion tube positioning portion protrudes toward the direction away from the holding portion.

6. The guiding laryngoscope according to claim 1, characterized in that: Also includes: The insertion tube positioning portion is extended and arranged at the tube outlet end of the guide groove along the extension line of the tube outlet end.

7. The guiding laryngoscope according to any one of claims 1 to 6, characterized in that: Also includes: The camera is arranged at one side of the tube outlet end of the guide groove, and the central axis of the camera's viewing angle is inclined toward the direction of the tube movement axis after the tube extends out along the tube outlet end of the guide groove.

8. The guiding laryngoscope according to claim 7, characterized in that: A first distance between the intersection of the camera's viewing angle central axis and the cannula's movement axis and the gripping portion is adapted to a second distance between the incisors and the glottis.

9. The guiding laryngoscope according to claim 7, characterized in that: The angle between the central axis of the camera and the cannula movement axis is 7° to 10°.

10. The guiding laryngoscope according to claim 8, characterized in that: The first distance is the sum of the distance between the intersection and the end of the tongue-lifting portion and the distance between the end of the tongue-lifting portion and the gripping portion.

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