Guide laryngoscope
By designing the grip, bending, and tongue-lifting structures of the guided laryngoscope and combining them with the perspective of an inclined camera, the problem of requiring multiple adjustments to existing laryngoscopes has been solved, thus improving the directness and success rate of intubation.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZHEJIANG UE MEDICAL
- Filing Date
- 2024-12-24
- Publication Date
- 2026-06-18
AI Technical Summary
Current laryngoscopes require doctors to adjust their position multiple times during intubation, which is especially problematic for inexperienced doctors. This results in severe irritation to the larynx, makes intubation difficult, and can easily damage the pharyngeal mucosa and teeth.
A guided laryngoscope was designed, including a grip, a bending part, and a tongue lifting part. The bending part has a guide groove, and the tongue lifting part extends along the bending direction. The grip and the tongue lifting part are connected to form a large-angle elliptical arc. The angle between the end of the guide groove away from the grip and the tongue lifting part is smaller than the angle between the central axis of the grip. The central axis of the camera's field of view is tilted so that the intubation tube can directly enter the glottis.
This reduces the number of steps doctors need to take to adjust the laryngoscope and intubate, increases the success rate of intubation, and reduces the risk of irritation and damage to the larynx.
Smart Images
Figure CN2024141715_18062026_PF_FP_ABST
Abstract
Description
A type of guided laryngoscope Technical Field
[0001] This application relates to the field of medical device technology, specifically to a guided laryngoscope. Background Technology
[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, the difference between the second included angle and the first included angle is greater than 0° and less than or equal to 4°.
[0007] Optionally, the first included angle is 75° to 77°.
[0008] Optionally, the gripping part is tilted toward the tongue-lifting part.
[0009] Optionally, the guided laryngoscope further includes: a tube positioning part disposed at the inlet end of the guide groove, the tube positioning part protruding in a direction away from the gripping part.
[0010] Optionally, the guide laryngoscope further includes: an intubation guide portion, which extends along the extension line of the intubation end at the outlet end of the guide groove.
[0011] Optionally, the guided laryngoscope further includes a camera disposed on one side of the outlet end of the guide groove, wherein the central axis of the camera's field of view is inclined toward the direction of the movement axis of the intubation tube after it extends along the outlet end of the guide groove.
[0012] Optionally, the first distance between the intersection of the camera's field of view center axis and the cannula's movement axis and the gripping part is adapted to the second distance between the incisors and the glottis.
[0013] Optionally, the angle between the central axis of the camera and the axis of motion of the cannula is 7° to 10°.
[0014] Optionally, the first distance is the sum of the distance between the end of the lifting tongue and the intersection of the central axis of the camera's field of view and the axis of the insertion cannula's movement, and the distance between the end of the lifting tongue and the gripping part.
[0015] This application has at least the following beneficial effects:
[0016] The guided laryngoscope includes a handle, a curved section, and a tongue levator. The curved section is connected to one end of the handle and has a guide groove for accommodating and guiding the endotracheal tube into the glottis. The tongue levator exposes the glottis to the patient's epiglottis, 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 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 within the curved section to serve as an intubation guide groove, allowing the intubation tube to directly enter the airway along this groove, thus improving the operability of the guided laryngoscope. Simultaneously, the first angle between the extension line of the guide groove's outlet end (away from the grip) and the central axis of the grip is smaller than the second angle between the extension line of the tongue lift's end (away from the grip) and the central axis of the grip. In other words, the orientation of the guide groove's end away from the grip is not parallel to the orientation of the tongue lift; the upward angle of the guide groove's end away from the grip is greater than the upward angle of the tongue lift's end away from the grip. Therefore, it can correct the angle at which the intubation tube sinks due to gravity after leaving the guide slot, allowing the intubation tube to directly enter the glottis through the guide slot for airway management. This is especially useful for inexperienced medical staff who need to align the guide slot with the glottis before intubation. Because it corrects the angle at which the intubation tube sinks due to gravity after leaving the guide slot, 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 adjustments.
[0017] 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.
[0018] 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 matched with 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. Attached Figure Description
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 is a schematic diagram of an exemplary structure of a guided laryngoscope according to an embodiment of this application;
[0022] Figure 2 is a schematic diagram of the position and relationship of the first included angle and the second included angle as described in the embodiments of this application;
[0023] Figure 3 is a schematic diagram of an exemplary structure of another guided laryngoscope according to an embodiment of this application;
[0024] Figure 4 is a schematic diagram of the positional relationship between the center axis of the camera's field of view and the axis of the cannula's movement as described in the embodiment of this application. Detailed Implementation
[0025] 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.
[0026] 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.
[0027] This application provides a guided laryngoscope, as shown in Figure 1. 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 exposes 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 large-angle elliptical curved section. A separate cavity is formed 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.
[0028] 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 will sink due to gravity after leaving the guide groove 2. This may require additional adjustment of the laryngoscope or intubation tube position to ensure smooth insertion of the tube after the guide groove 2 is aligned with the glottis. Therefore, in this embodiment, as shown in Figure 2, the first angle α between the extension line of the outlet end 22 of the guide groove 2 away from the grip 1 and the central axis of the grip 1 is smaller than the second angle β between the extension line of the end of the tongue lift 3 away from the grip 1 (i.e., the extension line of the end of the tongue lift 3) and the central axis of the grip 1. In other words, the orientation direction of the end of the guide groove 2 away from the grip 1 is not parallel to the orientation direction of the tongue lift 3, and the upward angle of the guide groove 2 away from the grip 1 is greater than the upward angle of the tongue lift 3 away from the grip 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] In one embodiment, as shown in FIG3, the guided laryngoscope further includes a cannula positioning part 23, which is disposed at the inlet end 21 of the guide groove 2, that is, at the opening of the guide groove 2 near the holding part 1. The cannula positioning part 23 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 also ensuring that the cannula does not detach from the guide groove 2.
[0033] In one embodiment, as shown in Figure 3, the guided laryngoscope further includes a cannula guide 24, which extends from the outlet end 22 of the guide groove 2 along the guide groove extension line 221. Extending the cannula guide 24 from the outlet end 22 of the guide groove 2 along the guide groove 2 enables overall cannula positioning. This ensures that when the cannula reaches the cannula guide 24 along the guide groove 2, it is not affected by the curvature of the cannula itself, and the cannula guide 24 can guide the cannula into the glottis along the observed trajectory.
[0034] 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.
[0035] In related technologies, the central axis 41 of the camera 4's field of view is often parallel to the axis of the intubation movement in the guide groove 2, causing a certain deviation between the observation point and the intubation position. During intubation, the laryngoscope needs to be moved to observe the intubation position, undoubtedly increasing unnecessary operations, especially for inexperienced doctors who may need to repeatedly observe the intubation position before intubation. Therefore, in this embodiment, to achieve direct observation of the glottis with a video laryngoscope and to quickly locate the glottis without unnecessary lifting or pulling movements after the laryngoscope enters the oral cavity, as shown in Figures 3 and 4, the guiding laryngoscope also includes a camera 4, located on one side of the outlet end 22 of the guide groove 2. The central axis 41 of the camera 4's field of view is tilted towards the intubation movement axis 5 after the intubation extends along the outlet end 22 of the guide groove 2. This allows the camera 4's field of view to be directed towards the intubation position, facilitating the guidance of the intubation to the glottis and ensuring a high success rate. Adaptive adjustments are made based on the angle and distance of the applicable population.
[0036] In one embodiment, as shown in FIG4, the third angle γ between the viewing center axis 41 of the camera 4 and the intubation movement axis 5 is 7° to 10°. That is, the camera 4 is rotated 7° to 10° toward the guide groove 2 in the direction indicated by the arrow, so as to ensure that the intersection of the viewing center axis 41 of the camera 4 and the intubation movement axis 5 is located at the glottis. In this embodiment, the third angle γ between the viewing center axis 41 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 jaws, the angle of the third angle γ can be an adaptive angle of 7°, 8°, 9°, or 10°.
[0037] Furthermore, in order to ensure that the intersection of the viewing center axis 41 of the camera 4 and the insertion tube movement axis 5 after the insertion tube extends along the outlet end 22 of the guide groove 2 falls exactly at the glottis position, that is, to ensure that the position where the insertion tube exits along the insertion tube 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 viewing center axis 41 of the camera 4 and the insertion tube movement axis 5 and the gripping part 1 is adapted to the second distance between the incisors and the glottis.
[0038] Typically, based on human anatomy, the second distance between the incisors and the glottis is 130mm to 150mm. The lower end of the gripping part 1 often rests against the incisors. Therefore, in this embodiment, by adapting the first distance between the intersection of the camera 4's viewing angle center axis 41 and the intubation movement axis 5 and the gripping part 1 to the second distance range, the laryngoscope can be inserted into the oral cavity. When the gripping part 1 rests against the incisors, the observation point can be locked at the glottic entrance. When the intubation tube reaches the viewing angle focal point along the guide groove 2, it can be guided precisely to the glottis, ensuring a high success rate for intubation. In this embodiment, the first distance can be adaptively adjusted based on the applicable population, such as for children, adults, and people with short mandibles.
[0039] In one embodiment, the first distance may include two parts: the first part is the distance between the end points of the gripping part 1 and the tongue lifting part 3, and the second part is the distance between the end of the tongue lifting part 3 and the intersection of the center axis 41 of the camera 4's field of view and the intubation movement axis 5. 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 included 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 range of the second distance or less than or equal to the second distance, so that when the intubation tube moves along the guide groove 2 to the focal point of the field of view, the intubation tube can be guided to the glottis, ensuring the success rate of intubation.
[0040] For example, the laryngoscope's camera 4 is tilted, forming an angle with the guide groove 2. The central axis 41 of the camera 4's field of view is located in the middle of the laryngoscope's grip 1. At the same time, the distance between the intersection of the intubation movement axis 5 and the central axis 41 and the end point of the tongue lift 3 is controlled to be about 50mm to 60mm. The grip 1 is 70mm away from the end point of the tongue lift 3. According to human anatomy, the distance between the incisors and the glottis is 130mm to 150mm. Therefore, the focal point of the field of view can be about 120mm to 130mm away from the handle. The angled design of the product can smoothly lock the observation point at the entrance of the glottis. When the intubation tube moves along the guide groove 2 to the focal point of the field of view, it can be guided to the glottis, ensuring the success rate of intubation.
[0041] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A guided laryngoscope, characterized in that, include: The gripping part, the curved part, and the lifting tongue part, among which, The curved portion is connected to one end of the gripping portion. The curved portion has a guide groove for guiding the insertion tube. One end of the lifting tongue is connected to the end of the curved portion away from the gripping portion and on the side facing the gripping portion. The other end of the lifting tongue extends along the bending direction of the curved portion. 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 grip is smaller than the second angle between the extension line of the end of the lifting tongue and the central axis of the grip.
2. The guiding laryngoscope as described in claim 1, characterized in that, The difference between the second included angle and the first included angle is greater than 0° and less than or equal to 4°.
3. The guided laryngoscope as described in claim 1, characterized in that, The first included angle is 75° to 77°.
4. The guiding laryngoscope as described in claim 1, characterized in that, The gripping part is tilted toward the tongue-lifting part.
5. The guided laryngoscope as described in claim 1, characterized in that, Also includes: An insertion positioning part is provided at the insertion end of the guide groove, and the insertion positioning part protrudes in a direction away from the gripping part.
6. The guided laryngoscope as described in claim 1, characterized in that, Also includes: The insertion guide is provided at the outlet end of the guide groove along the extension line of the outlet end.
7. The guiding laryngoscope as described in any one of claims 1 to 6, characterized in that, Also includes: A camera is positioned on one side of the outlet end of the guide groove, with the camera's field of view center axis tilted toward the direction of the insertion tube's movement axis after the insertion tube extends along the outlet end of the guide groove.
8. The guiding laryngoscope as described in claim 7, characterized in that, The first distance between the intersection of the camera's field of view center axis and the cannula's movement axis and the gripping part is adapted to the second distance between the incisors and the glottis.
9. The guiding laryngoscope as described in claim 7, characterized in that, The angle between the central axis of the camera and the axis of motion of the cannula is 7° to 10°.
10. The guided laryngoscope as described in claim 8, characterized in that, The first distance is the sum of the distance between the end of the lifting tongue and the intersection of the central axis of the camera's field of view and the axis of the insertion cannula's movement, and the distance between the end of the lifting tongue and the gripping part.