General anesthesia patients can see laryngoscope under the nose and stomach tube into the auxiliary device

Abstract

The utility model relates to medical instrument technical field especially full anesthesia patient visual laryngoscope under nasal gastric tube placement auxiliary device, including guide pipe, traction mechanism, support mechanism, stomach tube, antiskid mechanism, the inside of guide pipe is provided with guide cavity, the inside of guide cavity is equipped with support mechanism, the side of guide pipe is provided with main separation groove and penetrates, the inside of main separation groove is covered with water -soluble adhesive film that plays the effect of sticking, the side of guide cavity is equipped with stomach tube close to water -soluble adhesive film, and the front end of guide pipe is equipped with the traction mechanism that plays the role of guiding traction, and the rear end outside of guide pipe is equipped with the antiskid mechanism for playing the effect of preventing skidding, the utility model discloses realized the rigid support of guide pipe through support mechanism and the guiding effect of traction mechanism, so that guide pipe can reach esophageal inlet more accurately, and then guide stomach tube to insert into stomach according to the expected path, greatly reduced the catheterization failure condition due to the softness of stomach tube and the difficult control direction.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an auxiliary device for inserting a nasogastric tube under a video laryngoscope for patients under general anesthesia. Background Technology

[0002] Nasogastric tube insertion under video laryngoscopy in patients under general anesthesia is a procedure in which a gastric tube is inserted into the stomach through the nasal cavity with the assistance of a video laryngoscope. This combines the real-time imaging advantages of the video laryngoscope, allowing direct observation of the tube's path through the epiglottis, glottis, and esophagus. Traditionally, during nasogastric tube insertion under video laryngoscopy in patients under general anesthesia, the video laryngoscope or bronchoscope exposes the esophageal inlet, improving visibility to some extent. However, in practice, due to the tube's flexibility and difficulty in controlling its direction, the surgeon needs to repeatedly adjust the tube's orientation under the view of the video laryngoscope or bronchoscope. This significantly prolongs the procedure time and increases the patient's risk. Furthermore, the tube's inherent flexibility makes it prone to bending when encountering resistance, preventing it from being inserted into the stomach along the intended path, thus hindering the success rate of insertion.

[0003] When a nasogastric tube is inserted under general anesthesia using a video laryngoscope, although the video laryngoscope can expose the esophageal inlet, the tube is flexible and difficult to control in direction. This requires repeated adjustments during the procedure, which is time-consuming and makes it difficult to insert the tube into the stomach along the expected path, thus leading to a high failure rate.

[0004] Therefore, in order to address the shortcomings of existing nasogastric tube placement under video laryngoscopy in patients under general anesthesia, an auxiliary device for nasogastric tube placement under video laryngoscopy in patients under general anesthesia can be designed. By combining optimized guide tube structure with visual operation, the problem of difficult gastric tube placement can be solved, achieving rapid and accurate tube placement and reducing the risk of tissue damage. Utility Model Content

[0005] In order to overcome the shortcomings of existing methods for inserting nasogastric tubes under video laryngoscope in general anesthesia patients, which, although the video laryngoscope can expose the esophageal entrance, the tube is soft and difficult to control, requiring repeated adjustments during the operation, which is time-consuming and cannot be inserted into the stomach according to the expected path, thus easily leading to a high failure rate of tube insertion, this utility model provides an auxiliary device for inserting nasogastric tubes under video laryngoscope in general anesthesia patients.

[0006] The technical solution is as follows: An auxiliary device is inserted through a nasogastric tube under video laryngoscopy for patients under general anesthesia. The device includes a guide tube, a traction mechanism, a support mechanism, a gastric tube, and an anti-slip mechanism. The guide tube has a guide cavity inside, and a support mechanism that provides rigid support for the guide tube is located inside the guide cavity. A main release groove for easy release is opened through one side of the guide tube. The main release groove is covered with a water-soluble adhesive film that provides an adhesive effect. The gastric tube is located on the side of the guide cavity near the water-soluble adhesive film. The front end of the guide tube has a traction mechanism that provides guidance and traction. The rear end of the guide tube has an anti-slip mechanism to prevent slippage.

[0007] Furthermore, the traction mechanism includes a traction head, the outer end of which is provided with a tapered guide slope, the front end of which is provided with a beveled cut, and the outer end of the beveled cut is fitted with a rounded soft head.

[0008] Furthermore, the rear end of the traction head is equipped with a connector that connects to the guide tube, and the front end of the guide tube is screwed together with the traction head through the connector.

[0009] Furthermore, an auxiliary release groove corresponding to the main release groove is provided through one side of the connector, and the main release groove and the auxiliary release groove are interconnected.

[0010] Furthermore, the support mechanism includes a metal core, the front end of which extends into the interior of the guide cavity, and the front end of the metal core is provided with an arc-shaped head.

[0011] Furthermore, the rear end of the metal core extends to the outside of the guide cavity, and a spiral extraction handle is provided at the rear end of the metal core.

[0012] Furthermore, the anti-slip mechanism includes an annular sleeve, which is fitted over the outer rear end of the guide tube. An opening groove is provided through the outer side of the annular sleeve, and the opening groove is correspondingly set with the main release groove.

[0013] Furthermore, multiple sets of anti-slip rings are fitted onto the outer end of the annular sleeve, and these anti-slip rings are linearly arranged along the outer end of the annular sleeve.

[0014] The beneficial effects are as follows: Compared to traditional methods where a nasogastric tube is inserted under a laryngoscopy during general anesthesia, the tube is soft and difficult to control, requiring repeated adjustments and taking a long time, and it is impossible to insert it into the stomach along the expected path. This invention uses a metal core to rigidly support the guide tube and the guiding effect of the traction head, allowing the guide tube to reach the esophageal inlet more accurately, thus guiding the nasogastric tube into the stomach along the expected path. This greatly reduces the failure rate caused by the soft and difficult-to-control direction of the tube, improving the success rate of insertion. Unlike traditional methods, there is no need to repeatedly adjust the direction of the tube. With the help of the auxiliary device, the tube can be quickly inserted into the stomach, saving operation time and reducing the risk to the patient during the operation. The rounded soft tip of the traction head and the stable control of the entire auxiliary device during insertion reduce the risk of damage to tissues such as the nasal cavity, pharynx, and esophagus, improving patient safety. The anti-slip mechanism makes it easy for doctors to hold and operate, and the water-soluble adhesive membrane design facilitates the disengagement of the guide tube after guidance is completed. The entire auxiliary device has a reasonable structure and is easy to operate. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the auxiliary device for inserting a nasogastric tube under a video laryngoscope for general anesthesia patients according to the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the combination of the guide tube and the gastric tube of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the combination of the traction head and the conical guide slope of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the combination of the metal core and the spiral handle of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the combination of the annular sleeve and the anti-slip strip of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Guide tube; 101. Guide cavity; 2. Traction mechanism; 201. Traction head; 202. Conical guide slope; 203. Connecting joint; 204. Auxiliary release groove; 205. Angled cut; 206. Rounded soft head; 3. Main release groove; 4. Support mechanism; 301. Metal tube core; 302. Arc head; 303. Spiral extraction handle; 5. Gastric tube; 6. Anti-slip mechanism; 601. Annular sleeve; 602. Opening groove; 603. Anti-slip ring; 7. Water-soluble adhesive film. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] In modern medical systems, general anesthesia is widely used in various surgical treatment scenarios. During general anesthesia, nasogastric tube placement is a fundamental and important procedure that plays a key role in ensuring the stability of the patient's physiological functions during the perioperative period. Traditional nasogastric tube placement methods have a certain degree of blindness and may cause many complications, affecting the patient's treatment experience and recovery process. The introduction of video laryngoscope technology has brought innovation to nasogastric tube placement, significantly improving the accuracy and safety of this procedure, and becoming a powerful auxiliary means in the treatment process of patients under general anesthesia.

[0023] A video laryngoscope is a medical device that integrates optics, electronics, and mechanics. Its core components include a high-definition camera, a light source, and flexible lenses. When the video laryngoscope is inserted into the patient's throat through the mouth, the camera can collect real-time images of the throat and transmit them to a connected display screen. By observing the clear and intuitive images on the screen, doctors can accurately identify key anatomical structures such as the epiglottis, glottis, and esophageal inlet. This visual operation method greatly improves the doctor's ability to control the patient's throat condition compared to traditional blind probing, providing reliable visual guidance for the successful insertion of a nasogastric tube into the esophagus.

[0024] In traditional blind tube placement, the nasogastric tube's movement cannot be directly observed, making it prone to friction and collision with the nasal and pharyngeal mucosa, leading to mucosal damage and bleeding. However, under video laryngoscopy, doctors can observe the contact between the nasogastric tube and surrounding tissues in real time. When resistance or potential damage is encountered, the position of the nasogastric tube can be adjusted promptly, significantly reducing the incidence of mucosal damage. This not only alleviates postoperative pain for patients but also reduces the risk of complications such as infection caused by mucosal damage.

[0025] During surgery, patients under general anesthesia may experience a serious risk of reflux and aspiration due to weakened or absent airway protection reflexes. Timely and accurate placement of a nasogastric tube for gastrointestinal decompression can effectively reduce the accumulation of gastric contents and lower the possibility of reflux and aspiration. Nasogastric tube placement under video laryngoscopy ensures accurate placement of the tube into the stomach and proper positioning, thereby better fulfilling the role of gastrointestinal decompression and providing important protection for the airway safety of patients under general anesthesia.

[0026] In major surgeries such as cardiothoracic surgery and abdominal surgery, patients often need to be under general anesthesia for a long time. During this period, gastrointestinal decompression can be performed by inserting a nasogastric tube under video laryngoscopy, which can effectively prevent gastrointestinal distension, create good space conditions for surgical operation, and reduce the adverse effects of gastrointestinal distension on the respiratory and circulatory systems. For example, in liver transplantation surgery, a precisely placed nasogastric tube can drain gastric contents in a timely manner and avoid reflux and aspiration from interfering with the recovery of transplanted liver function.

[0027] Elderly and critically ill patients have relatively weak physiological functions, their airway anatomy may vary, and they often have multiple underlying diseases. These factors make them more at risk during general anesthesia surgery, and the requirements for the accuracy and safety of nasogastric tube placement are more stringent. Video laryngoscopy can better address the complex airway conditions of these patients, improve the success rate of tube placement, reduce the occurrence of complications, and lay the foundation for the smooth progress of the surgery and the patient's postoperative recovery.

[0028] For patients with difficult airways, such as those who are obese, have limited cervical spine mobility, or have a receding jaw, traditional nasogastric tube placement methods often present greater challenges. Video laryngoscopes, by clearly displaying the airway structure, help doctors avoid anatomically abnormal areas and choose the optimal placement path, greatly improving the feasibility and safety of nasogastric tube placement in patients with difficult airways. In surgeries for these patients, video laryngoscope-guided nasogastric tube placement has become an important means of ensuring airway management and patient safety.

[0029] Although nasogastric tube insertion under video laryngoscopy can reduce the risk of nasal bleeding, nasal bleeding may still occur during the procedure due to irritation or damage to the nasal mucosa caused by the nasogastric tube. Countermeasures include thoroughly assessing the patient's nasal cavity before the procedure and selecting an appropriate nasal cavity and nasogastric tube diameter; performing the procedure gently and avoiding rough insertion; and if nasal bleeding occurs, local pressure hemostasis methods can be used, such as packing the bleeding nasal cavity with a cotton ball soaked in ephedrine solution.

[0030] Although nasogastric tube insertion under video laryngoscopy can reduce the risk of nasal bleeding, nasal bleeding may still occur during the procedure due to irritation or damage to the nasal mucosa caused by the nasogastric tube. Countermeasures include thoroughly assessing the patient's nasal cavity before the procedure and selecting an appropriate nasal cavity and nasogastric tube diameter; performing the procedure gently and avoiding rough insertion; and if nasal bleeding occurs, local pressure hemostasis methods can be used, such as packing the bleeding nasal cavity with a cotton ball soaked in ephedrine solution.

[0031] Postoperative symptoms may include sore throat and a feeling of a foreign body. This is mainly due to the stimulation of the pharyngeal mucosa by the video laryngoscope and nasogastric tube. To alleviate the patient's discomfort, damage to the pharyngeal tissues should be minimized during the procedure. After the procedure, the patient can be given nebulized inhalation therapy with a nebulized solution containing glucocorticoids to reduce edema and inflammation of the pharyngeal mucosa.

[0032] If aseptic principles are not strictly followed during the procedure, or if the nasogastric tube is left in place for too long, respiratory or gastrointestinal infections may occur. The key to preventing infection is to strictly adhere to aseptic techniques, change the nasogastric tube and related nursing supplies regularly, and closely monitor the patient for symptoms of infection such as fever, cough, sputum, abdominal pain, and diarrhea. Once signs of infection are detected, appropriate anti-infection treatment should be initiated promptly.

[0033] Example 1

[0034] like Figures 1-5 As shown, an auxiliary device for inserting a nasogastric tube under a video laryngoscope for patients under general anesthesia includes a guide tube 1, a traction mechanism 2, a support mechanism 4, a gastric tube 5, and an anti-slip mechanism 6. The guide tube 1 has a guide cavity 101 inside, and the guide cavity 101 has a support mechanism 4 that provides rigid support for the guide tube 1. A main release groove 3 that facilitates release is opened through one side of the guide tube 1. The main release groove 3 is covered with a water-soluble adhesive film 7 that has an adhesive effect. The gastric tube 5 is located on the side of the guide cavity 101 near the water-soluble adhesive film 7. The front end of the guide tube 1 has a traction mechanism 2 that provides guidance and traction, and the rear end of the guide tube 1 has an anti-slip mechanism 6 that prevents slippage.

[0035] Furthermore, the traction mechanism 2 includes a traction head 201, with a tapered guide slope 202 at the outer end of the traction head 201 and an oblique incision 205 at the front end of the traction head 201. A rounded soft tip 206 is fitted onto the outer end of the oblique incision 205. By using the traction head 201 in conjunction with the tapered guide slope 202, the resistance in the pharynx is dispersed, preventing the front end of the gastric tube 5 from getting stuck in the epiglottis or piriform recess, thus improving the first-pass rate. With the oblique incision 205 in conjunction with the rounded soft tip 206, the insertion angle is easier to observe under the laryngoscope view, allowing for precise alignment with the esophageal inlet. The rounded soft tip 206 can avoid damage to tissues from sharp edges.

[0036] The rear end of the traction head 201 is provided with a connector 203 that is connected to the guide pipe 1. The front end of the guide pipe 1 is screwed to the traction head 201 through the connector 203, and the traction head 201 and the guide pipe 1 are connected through the connector 203.

[0037] One side of the connector 203 is provided with an auxiliary release groove 204 corresponding to the main release groove 3. The main release groove 3 and the auxiliary release groove 204 are interconnected. Through the connection between the auxiliary release groove 204 and the main release groove 3, the guide tube 1 can be more easily detached from the gastric tube 5 after the tube placement operation is completed.

[0038] The support mechanism 4 includes a metal core 301. The front end of the metal core 301 extends into the interior of the guide cavity 101. The front end of the metal core 301 is provided with an arc head 302. The metal core 301 can provide rigid support for the soft guide tube 1, change the soft characteristics of the guide tube 1, and make it easier to control the direction during insertion. The arc head 302 can prevent the metal core 301 from causing damage to the tissue in case of operational errors.

[0039] The rear end of the metal core 301 extends to the outside of the guide cavity 101. The rear end of the metal core 301 is provided with a spiral extraction handle 303. The spiral extraction handle 303 makes it easier and more convenient for the doctor to pull the metal core 301 out of the guide tube 1 after completing the catheter placement operation.

[0040] The anti-slip mechanism 6 includes an annular sleeve 601, which is fitted over the outer rear end of the guide tube 1. An opening groove 602 is provided through the outer side of the annular sleeve 601. The opening groove 602 is correspondingly set with the main disengagement groove 3. By cooperating with the main disengagement groove 3, the opening groove 602 makes it easier for the doctor to operate the main disengagement groove 3 when it is necessary to disengage the guide tube 1 from the gastric tube 5.

[0041] Multiple sets of anti-slip rings 603 are fitted on the outer end of the annular sleeve 601. The multiple sets of anti-slip rings 603 are linearly arranged along the outer end of the annular sleeve 601. The anti-slip rings 603 cooperate with the annular sleeve 601 to increase the friction of the outer surface of the annular sleeve 601, making the doctor hold the guide tube 1 more firmly, effectively preventing the guide tube 1 from slipping in the hand, and ensuring the stability of the guide tube 1 during the operation.

[0042] During operation, firstly, the metal core 301 is inserted into the guide cavity 101 of the guide tube 1, so that the arc head 302 at the front end of the metal core 301 is located at the front end of the guide cavity 101, and the spiral pull-out head 303 at the rear end is exposed outside the guide cavity 101. The traction mechanism 2 is installed at the front end of the guide tube 1, and the butt joint 203 at the rear end of the traction head 201 is spirally connected to the front end of the guide tube 1 to ensure a tight connection. At this time, the main release groove 3 and the auxiliary release groove 204 are connected to each other. Next, the annular sleeve 601 is put on the outside of the rear end of the guide tube 1, so that the opening groove 602 corresponds to the main release groove 3. Then, the gastric tube 5 is placed into the guide cavity 101, so that the water-soluble adhesive film 7 in the opening groove 602 sticks the gastric tube 5.

[0043] Next, with the assistance of a video laryngoscope, the guide tube 1 with the traction mechanism 2 is slowly inserted into the patient's nasal cavity. The support mechanism 4 provides rigid support for the guide tube 1. Using the tapered guide slope 202 at the outer end of the traction head 201, the guide tube 1 is guided smoothly through the nasal cavity and other parts. When the front end of the guide tube 1 reaches the appropriate position, it is observed through the video laryngoscope to ensure that the oblique incision 205 at the front end of the traction head 201 is aligned with the esophageal entrance and inserted into the stomach. Since the oblique incision 205 at the front end of the traction head 201 is fitted with a rounded soft head 206, it can reduce damage to the tissue. At the same time, during insertion, the anti-slip mechanism 6 can be held in conjunction with the metal tube core 301 to adjust the insertion angle.

[0044] After insertion, rotate the spiral extraction handle 303 to pull the metal core 301 out of the guide cavity 101. The water-soluble adhesive membrane 7 melts and decomposes in the stomach when it encounters body fluid, causing the gastric tube 5 to separate from the main separation groove 3 and the auxiliary separation groove 204. After separation, hold the annular sleeve 601 and use the anti-slip ring 603 to increase friction to pull the guide tube 1 and the traction mechanism 2 out of the patient's nasal cavity, completing the gastric tube 5 insertion operation.

[0045] It is worth mentioning that the guide tube 1 and the traction head 201 in this application are both made of medical-grade flexible polymer materials such as silicone or polyurethane, with lubricated surfaces, which is inexpensive and 30cm in length, with a diameter that fits a standard gastric tube 5 (5-7mm). The guide tube 1 and the traction head 201 are curved at 15°-30° to fit the anatomical path from the pharynx to the esophageal inlet.

[0046] Its working principle is that after the metal core 301 in the support mechanism 4 is inserted into the guide cavity 101, it plays a rigid support role for the guide tube 1, changing the original soft characteristics of the guide tube 1, so that it can maintain a stable shape during the insertion process, making it easier for the doctor to control the direction and reach the target position smoothly.

[0047] The traction head 201 of the traction mechanism 2 guides the insertion process through the tapered guide slope 202, allowing the guide tube 1 to move along the correct path. The rounded soft head 206 outside the oblique cut 205 reduces damage to the tissue and allows for smoother passage through narrow areas. The connector 203 is spirally connected to the guide tube 1 to ensure a stable connection between the traction head 201 and the guide tube 1. The auxiliary release groove 204 is connected to the main release groove 3 to facilitate the subsequent release of the guide tube 1.

[0048] The annular sleeve 601 of the anti-slip mechanism 6 is fitted onto the rear end of the guide tube 1. The opening groove 602 is set corresponding to the main release groove 3, which does not affect the subsequent release operation of the guide tube 1. The anti-slip ring 603 increases the friction when the doctor holds the annular sleeve 601, so that the doctor can control the guide tube 1 more stably during the operation, avoid it from slipping, and improve the accuracy of the operation.

[0049] The water-soluble adhesive membrane 7 covering the main release groove 3 temporarily fixes the gastric tube 5 under normal conditions. When it enters the stomach, the water-soluble adhesive membrane 7 decomposes and melts upon contact with the gastric fluid, allowing the gastric tube 5 to separate from the main release groove 3.

[0050] Its beneficial effects are significant. Through the rigid support of the guide tube 1 by the metal core 301 and the guiding effect of the traction head 201, the guide tube 1 can reach the esophageal inlet more accurately, thereby guiding the gastric tube 5 to be inserted into the stomach along the expected path. This greatly reduces the failure of tube placement caused by the soft and difficult-to-control direction of the gastric tube 5, and improves the success rate of tube placement. Unlike the traditional method, there is no need to repeatedly adjust the direction of the gastric tube 5. With the help of the auxiliary device, the gastric tube 5 can be quickly placed into the stomach, saving operation time and reducing the risk to the patient during the operation. Through the rounded soft head 206 at the front end of the traction head 201 and the stable control of the entire auxiliary device during the insertion process, the risk of damage to tissues such as the nasal cavity, pharynx, and esophagus is reduced, improving the patient's safety. The anti-slip mechanism 6 makes it easy for doctors to hold and operate, and the water-soluble adhesive membrane 7 is designed to facilitate the detachment of the guide tube 1 after guidance is completed. The entire auxiliary device has a reasonable structure and is easy to operate.

Claims

1. An auxiliary device for inserting a nasogastric tube under video laryngoscopy in patients under general anesthesia, comprising a guide tube (1); characterized in that, It also includes a traction mechanism (2), a support mechanism (4), a gastric tube (5), and an anti-slip mechanism (6); the guide tube (1) has a guide cavity (101) inside, and the guide cavity (101) has a support mechanism (4) that provides rigid support for the guide tube (1) inside. A main release groove (3) that facilitates release is opened through one side of the guide tube (1). The main release groove (3) is covered with a water-soluble adhesive film (7) that acts as an adhesive. The gastric tube (5) is located on the side of the guide cavity (101) near the water-soluble adhesive film (7). The front end of the guide tube (1) has a traction mechanism (2) that acts as a guide and traction mechanism. The rear end of the guide tube (1) has an anti-slip mechanism (6) that prevents slippage.

2. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 1, characterized in that, The traction mechanism (2) includes a traction head (201), the outer end of the traction head (201) is provided with a tapered guide slope (202), the front end of the traction head (201) is provided with a bevel (205), and the outer end of the bevel (205) is fitted with a rounded soft head (206).

3. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 2, characterized in that, The rear end of the traction head (201) is provided with a connector (203) that connects to the guide tube (1), and the front end of the guide tube (1) is screwed to the traction head (201) through the connector (203).

4. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 3, characterized in that, A secondary release groove (204) corresponding to the main release groove (3) is provided through one side of the connector (203), and the main release groove (3) and the secondary release groove (204) are interconnected.

5. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 1, characterized in that, The support mechanism (4) includes a metal core (301), the front end of which extends into the interior of the guide cavity (101), and the front end of the metal core (301) is provided with an arc head (302).

6. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 5, characterized in that, The rear end of the metal core (301) extends to the outside of the guide cavity (101), and the rear end of the metal core (301) is provided with a spiral extraction handle (303).

7. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 1, characterized in that, The anti-slip mechanism (6) includes an annular sleeve (601), which is fitted around the outer rear end of the guide tube (1). An opening groove (602) is provided through the outer side of the annular sleeve (601), and the opening groove (602) is correspondingly provided with the main release groove (3).

8. The nasogastric tube insertion auxiliary device under video laryngoscopy for general anesthesia patients according to claim 7, characterized in that, Multiple sets of anti-slip rings (603) are fitted on the outer end of the annular sleeve (601), and the multiple sets of anti-slip rings (603) are linearly arranged along the outer end of the annular sleeve (601).

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