A device for detecting a tracheoesophageal fistula

Abstract

This invention relates to the field of medical device technology, specifically to a device for detecting tracheoesophageal fistulas, comprising a housing, an esophageal tube and an endotracheal tube inserted through the housing, an oxygen detector mounted at the bottom of the esophageal tube, and a second airbag coaxially fixedly mounted on the outer surface of the esophageal tube near the bottom; a second camera and a second searchlight mounted at the bottom of the endotracheal tube, a guide ring fixedly mounted inside the endotracheal tube near the bottom, a guide block slidably mounted on the guide ring, control ropes fixedly mounted on both sides of the guide block, and a direction control rope fixedly mounted on the upper surface of the guide block; the beneficial effects of this invention are: by setting a housing with an shape similar to a laryngoscope, the esophageal tube and endotracheal tube can be limited, allowing the esophageal tube and endotracheal tube to be directly aligned with the esophagus and trachea, facilitating the insertion of the esophageal tube and endotracheal tube.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a device for detecting tracheoesophageal fistulas. Background Technology

[0002] Tracheoesophageal fistula is a disease caused by congenital or acquired reasons, such as trauma or esophageal cancer, that causes the trachea and esophagus to communicate. It often leads to serious and difficult-to-cure pulmonary complications, such as aspiration pneumonia. In severe cases, it can prevent patients from eating orally, reducing their quality of life. Before treating tracheoesophageal fistula, it is necessary to determine the location of the fistula.

[0003] Current methods for detecting tracheoesophageal fistulas typically involve inserting a probe into the patient's esophagus. This method is time-consuming, increases patient discomfort, and requires removing the probe from the esophagus and re-inserting it if the fistula needs to be observed. This is inconvenient and increases the probability of damage to the tracheal and esophageal walls.

[0004] Therefore, a device is needed to detect tracheoesophageal fistulas in order to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, namely the long detection time and difficulty in observing the condition at the other end of the tracheoesophageal fistula in existing methods, this invention provides a device for detecting tracheoesophageal fistulas.

[0006] A device for detecting tracheoesophageal fistula includes a housing, an esophageal tube and an endotracheal tube that are installed through the interior of the housing, an oxygen detector installed at the bottom end of the esophageal tube, and a second airbag coaxially fixedly installed on the outer surface of the esophageal tube near the bottom end; a second camera and a second searchlight are installed at the bottom end of the endotracheal tube, a guide ring is fixedly installed inside the endotracheal tube near the bottom end, a guide block is slidably installed on the guide ring, control ropes are fixedly installed on both sides of the guide block, and a directional control rope is fixedly installed on the upper surface of the guide block.

[0007] The aforementioned device for detecting tracheoesophageal fistula has a first airbag coaxially fixedly installed on the outer surface of the housing near the bottom. The housing has a first inflation hole inside, the bottom of which is connected to the first airbag, and the top of which passes through the top of the housing and is connected to an external inflation device.

[0008] The aforementioned device for detecting tracheoesophageal fistula has an esophageal channel and a tracheal channel inside the housing. The bottom end of the esophageal channel penetrates the bottom end of the housing, and the top end of the esophageal channel penetrates the top end of the housing. An esophageal cannula is slidably installed inside the esophageal channel. The top end of the tracheal channel penetrates the top end of the housing, and the bottom end of the tracheal channel penetrates the inner side of the housing. An tracheal cannula is slidably installed inside the tracheal channel.

[0009] The aforementioned device for detecting tracheoesophageal fistula has a sealing plate groove located inside the housing near the inner side. A sealing plate is slidably installed inside the sealing plate groove. A clamping plate is fixedly installed on the outer surface of the sealing plate near the bottom end. The clamping plate is inclined outward. A through hole is formed through the sealing plate, located above the clamping plate. The diameter of the through hole is equal to the diameter of the tracheal passage.

[0010] The aforementioned device for detecting tracheoesophageal fistulas includes an esophageal guide head fixedly installed at the bottom end of the esophageal cannula. An esophageal guide head has a coaxial mounting hole at its bottom end. An oxygen detector is fixedly installed at the top of the mounting hole. An mounting plate is fixedly installed inside the mounting hole near its bottom end. A ventilation hole is formed through the mounting plate. Inclined plates are alternately installed on the inner surface of the mounting hole, located between the oxygen detector and the mounting plate. A first camera is fixedly installed on the lower surface of the mounting plate. A first searchlight is provided at the bottom end of the esophageal guide head.

[0011] The aforementioned device for detecting tracheoesophageal fistulas includes a tracheal guide head fixedly installed at the bottom end of the endotracheal tube, and a second camera and a second searchlight both fixedly installed at the bottom end of the tracheal guide head. An installation cavity is provided inside the endotracheal tube near its bottom end, and a guide ring is fixedly installed within the installation cavity. Two control holes are provided inside the endotracheal tube, and the tips of two control ropes extend through the two control holes to the outside of the endotracheal tube. A directional control hole is provided inside the endotracheal tube, with its bottom end tapered and connected to the installation cavity. The tip of the directional control rope extends through the directional control hole to the outside of the endotracheal tube.

[0012] The aforementioned device for detecting tracheoesophageal fistulas includes a guide ring with a notch and an internal sliding groove connected to the lower part of the guide ring via an extension groove. A guide block has a through-hole matching the guide ring at its center. An internal slider is fixedly mounted on the inner surface of the guide block via an extension plate. The internal slider slides within the internal sliding groove via the extension plate, and the extension plate slides within the extension groove. One end of each of the two control ropes is fixedly connected to both sides of the internal slider, and the other ends of both control ropes extend through the notch.

[0013] The aforementioned device for detecting tracheoesophageal fistulas includes an esophageal cannula with a second inflation port inside. The bottom end of the second inflation port is connected to the second air bag, and the top end of the second inflation port is connected to an external inflation device.

[0014] The aforementioned device for detecting tracheoesophageal fistulas includes an air supply hole inside the endotracheal tube. The bottom end of the air supply hole penetrates the bottom end of the endotracheal guide head, and the top end of the air supply hole penetrates the top end of the endotracheal tube.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The present invention, by setting a shell with an shape similar to a laryngoscope, can limit the esophageal tube and tracheal tube, so that the esophageal tube and tracheal tube can be directly aligned with the esophagus and trachea, which facilitates the insertion of the esophageal tube and tracheal tube.

[0017] 2. The present invention, by setting an oxygen detector and a second airbag at the bottom of the esophageal cannula, allows the second airbag to block the esophagus, and the location of the fistula can be easily detected by the oxygen detector. Combined with the positioning of the esophageal cannula by the aforementioned shell, the time required to detect the location of the fistula is greatly reduced.

[0018] 3. In this invention, by setting up an endotracheal tube, the endotracheal tube can be inserted into the trachea while the esophageal tube is still in the esophagus. This allows for simultaneous observation of the fistula in both the esophagus and trachea. Furthermore, based on the downward distance of the esophageal tube, the second camera can easily reach the location of the fistula.

[0019] 4. In this invention, the position of the guide block on the guide ring can be controlled by setting two control ropes. Then, by pulling the control ropes, the bottom end of the endotracheal tube can be bent in different directions, which can prevent the bottom end of the endotracheal tube from directly hitting the tracheal wall when entering the trachea and causing damage to the tracheal wall.

[0020] 5. In this invention, by setting a first air bladder, after the bottom end of the shell is inserted into the esophagus, the first air bladder can be inflated to block the top end of the esophagus and prevent gas from entering the esophagus.

[0021] 6. In this invention, by setting a sealing plate, when the shell is placed into the patient's mouth and extended downward, it can prevent the patient's upward-curving epiglottis from getting stuck in the tracheal passage, thus protecting the patient's epiglottis. The sealing plate can eliminate the ridge formed between the tracheal passage and the shell. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0024] Figure 3 This is a schematic cross-sectional view of the esophageal cannulation structure of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic cross-sectional view of the endotracheal tube of the present invention;

[0027] Figure 6 This is a schematic diagram of the guide ring structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the guide block structure of the present invention.

[0029] In the picture:

[0030] 1. Shell; 2. Esophageal tube; 3. Tracheal tube; 4. Oxygen detector; 5. Second airbag; 6. Second camera; 7. Second spotlight; 8. Guide ring; 9. Guide block; 10. Position control rope; 11. Direction control rope; 12. First airbag; 13. First inflation port; 14. Esophageal passage; 15. Tracheal passage; 16. Sealing plate groove; 17. Sealing plate; 18. Clamping plate; 19. Perforation; 20. Esophageal guide head; 21. Mounting hole; 22. Mounting plate; 23. Ventilation port; 24. Inclined plate; 25. First camera; 26. First spotlight; 27. Tracheal guide head; 28. Mounting cavity; 29. ​​Position control hole; 30. Direction control hole; 31. Internal sliding groove; 32. Extension groove; 33. Extension plate; 34. Internal slider; 35. Second inflation port; 36. Air supply port. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] like Figure 1 and Figure 3-6As shown, this invention discloses a device for detecting tracheoesophageal fistulas, comprising a housing 1, with an esophageal cannula 2 and an endotracheal cannula 3 installed through the interior of the housing 1. An oxygen detector 4 is installed at the bottom of the esophageal cannula 2, and a second air bag 5 is coaxially fixedly installed on the outer surface of the esophageal cannula 2 near its bottom. A second camera 6 and a second searchlight 7 are installed at the bottom of the endotracheal cannula 3. A guide ring 8 is fixedly installed inside the endotracheal cannula 3 near its bottom, and a guide block 9 is slidably installed on the guide ring 8. Control ropes 10 are fixedly installed on both sides of the guide block 9, and a directional rope 11 is fixedly installed on the upper surface of the guide block 9. The housing 1 has an external shape similar to a laryngoscope. When it is necessary to detect a tracheoesophageal fistula, the device is... The housing 1 is inserted into the patient's mouth, with its bottom end inserted into the esophagus. At this point, the bottom end of the esophageal cannula 2 is aligned with the esophagus, and the bottom end of the endotracheal cannula 3 is aligned with the trachea. Once everything is ready, the esophageal cannula 2 is pushed downwards. After descending a certain distance, the second balloon 5 inflates to block the esophagus. The oxygen concentration in the esophagus is detected by the oxygen detector 4 to see if it exceeds the set value. If it does, it indicates that the fistula connecting to the trachea is still below. The second balloon 5 is then deflated, and the esophageal cannula 2 is pushed downwards again. After descending a certain distance, the above steps are repeated. If the oxygen concentration exceeds the set value of the oxygen detector 4, it indicates that the fistula connecting to the trachea is still below. The esophageal cannula continues to descend. If the oxygen concentration is below the set value of the oxygen detector 4... The fistula opening communicating with the trachea is located at the top. The esophageal tube 2 is moved upwards, and the upward distance is shortened. Repeating this process several times easily determines the location of the fistula. When it is necessary to observe the condition of the fistula within the esophagus, the endotracheal tube 3 is moved downwards according to the distance the esophageal tube 2 has traveled. The fistula can be observed through the second camera 6. As the endotracheal tube 3 moves downwards, the position of the guide block 9 on the guide ring 8 can be controlled by pulling the two position control ropes 10. Pulling the direction control rope 11 can cause the bottom end of the endotracheal tube 3 to bend in different directions, preventing the bottom end of the endotracheal tube 3 from directly hitting the tracheal wall and causing damage. By using a housing 1 with an shape similar to a laryngoscope, the esophageal tube 2 and trachea can be positioned... The intubation tube 3 is positioned to allow the esophageal intubation tube 2 and the endotracheal intubation tube 3 to be directly aligned with the esophagus and trachea, facilitating their insertion. By installing an oxygen detector 4 and a second airbag 5 at the bottom of the esophageal intubation tube 2, the second airbag 5 blocks the esophagus, and the location of the fistula can be easily detected by the oxygen detector 4. Combined with the positioning of the esophageal intubation tube 2 by the aforementioned shell, the time required to detect the location of the fistula is greatly reduced. By setting the endotracheal intubation tube 3, the endotracheal intubation tube 3 can be inserted into the trachea while the esophageal intubation tube 2 is still in the esophagus, allowing simultaneous observation of the fistula condition in the esophagus and trachea. Furthermore, based on the downward distance of the esophageal intubation tube 2, the second camera 6 can easily reach the location of the fistula.

[0033] like Figure 1As shown, a first airbag 12 is coaxially fixedly installed on the outer surface of the shell 1 near the bottom. A first inflation hole 13 is provided inside the shell 1. The bottom end of the first inflation hole 13 is connected to the first airbag 12, and the top end of the first inflation hole 13 passes through the top end of the shell 1 and is connected to an external inflation device. By setting the first airbag 12, after the bottom end of the shell 1 is inserted into the esophagus, the first airbag 12 can be inflated to block the top end of the esophagus and prevent gas from entering the esophagus.

[0034] like Figure 1 As shown, the shell 1 has an esophageal passage 14 and a tracheal passage 15 inside. The bottom end of the esophageal passage 14 penetrates the bottom end of the shell 1, and the top end of the esophageal passage 14 penetrates the top end of the shell 1. The esophageal tube 2 is slidably installed in the esophageal passage 14. The top end of the tracheal passage 15 penetrates the top end of the shell 1, and the bottom end of the tracheal passage 15 penetrates the inner side of the shell 1. The tracheal tube 3 is slidably installed in the tracheal passage 15. The esophageal passage 14 and the tracheal passage 15 not only provide sliding space for the esophageal tube 2 and the tracheal tube 3, but also play a positioning role for the esophageal tube 2 and the tracheal tube 3.

[0035] like Figure 1-2 As shown, a sealing groove 16 is provided inside the shell 1 near the inner side. A sealing plate 17 is slidably installed inside the sealing groove 16. A retaining plate 18 is fixedly installed on the outer surface of the sealing plate 17 near the bottom. The retaining plate 18 is inclined outward. A through hole 19 is provided on the sealing plate 17. The through hole 19 is located above the retaining plate 18. The diameter of the through hole 19 is equal to the diameter of the tracheal passage 15. By setting the sealing plate 17, when the shell 1 is placed into the patient's mouth and extended downward, it can prevent the patient's upward-curving epiglottis from getting stuck in the tracheal passage, thus protecting the patient's epiglottis. The retaining plate 18 can eliminate the edge formed between the tracheal passage 15 and the shell 1. When it is necessary to insert the endotracheal tube 3 into the patient's trachea, the sealing plate 17 is slid down so that the through hole 19 is aligned with the tracheal passage 15.

[0036] like Figure 3-4As shown, an esophageal guide head 20 is fixedly installed at the bottom end of the esophageal cannula 2. An installation hole 21 is coaxially opened at the bottom end of the esophageal guide head 20. An oxygen detector 4 is fixedly installed at the top of the installation hole 21. An installation plate 22 is fixedly installed inside the installation hole 21 near the bottom end. A vent hole 23 is opened through the installation plate 22. Inclined plates 24 are installed alternately on the inner surface of the installation hole 21. The inclined plates 24 are located between the oxygen detector 4 and the installation plate 22. A first camera 25 is fixedly installed on the lower surface of the installation plate 22. A first searchlight 26 is provided at the bottom end of the esophageal guide head 20. The first camera 25 and the first searchlight 26 assist the downward movement of the esophageal cannula 2. By setting the inclined plates 24 and opening the vent hole 23 on the installation plate 22, not only will the position of the gas reaching the oxygen detector 4 not be affected, but the debris and mucus in the esophagus can also be blocked, preventing the mucus from coating the oxygen detector 4 and affecting the detection results.

[0037] like Figure 5 As shown, a tracheal guide head 27 is fixedly installed at the bottom end of the endotracheal tube 3. The second camera 6 and the second searchlight 7 are both fixedly installed at the bottom end of the endotracheal guide head 27. An installation cavity 28 is opened inside the endotracheal tube 3 near the bottom end. The guide ring 8 is fixedly installed in the installation cavity 28. Two control holes 29 are opened inside the endotracheal tube 3. The top ends of the two control ropes 10 pass through the two control holes 29 and extend to the outside of the endotracheal tube 3. A directional control hole 30 is opened inside the endotracheal tube 3. The bottom end of the directional control hole 30 is conical and communicates with the installation cavity 28. The top end of the directional control rope 11 passes through the directional control hole 30 and extends to the outside of the endotracheal tube 3. By designing the bottom end of the directional control hole 30 as conical, the directional control rope 11 can be located inside the directional control hole 30 no matter where the guide block 9 moves on the guide ring 8.

[0038] like Figure 6-7 As shown, a notch is provided on the guide ring 8, and an internal sliding groove 31 is provided inside the guide ring 8. The internal sliding groove 31 is connected to the lower part of the guide ring 8 through an extension groove 32. A sliding hole matching the guide ring 8 is provided through the middle position of the guide block 9. An internal slider 34 is fixedly installed on the inner surface of the guide block 9 through an extension plate 33. The internal slider 34 slides in the internal sliding groove 31 through the extension plate 33, and the extension plate 33 slides in the extension groove 32. One end of each of the two control pull ropes 10 is fixedly connected to the two sides of the internal slider 34, and the other end of each of the two control pull ropes 10 extends out through the notch. The internal sliding groove 31 can provide movement space for the control pull ropes 10, and through the guidance of the internal sliding groove 31, the guide block 9 can be controlled to move in two directions by pulling the two control pull ropes 10.

[0039] like Figure 3As shown, the esophageal cannula 2 has a second inflation port 35 inside. The bottom end of the second inflation port 35 is connected to the second air bag 5, and the top end of the second inflation port 35 is connected to the external inflation device.

[0040] like Figure 5 As shown, the endotracheal tube 3 has an air supply port 36 inside. The bottom end of the air supply port 36 passes through the bottom end of the endotracheal guide head 27, and the top end of the air supply port 36 passes through the top end of the endotracheal tube 3. After the endotracheal tube 3 is inserted into the patient's trachea, the air supply port 36 can provide the patient with the gas required for breathing.

[0041] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0044] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A device for detecting tracheoesophageal fistulas, characterized in that, The device includes a housing (1), inside which an esophageal cannula (2) and an endotracheal cannula (3) are installed. An oxygen detector (4) is installed at the bottom of the esophageal cannula (2). A second airbag (5) is coaxially fixedly installed on the outer surface of the esophageal cannula (2) near the bottom. A second camera (6) and a second searchlight (7) are installed at the bottom of the endotracheal cannula (3). A guide ring (8) is fixedly installed inside the endotracheal cannula (3) near the bottom. A guide block (9) is slidably installed on the guide ring (8). A position control rope (10) is fixedly installed on both sides of the guide block (9). A direction control rope (11) is fixedly installed on the upper surface of the guide block (9). The housing (1) has an esophageal passage (14) and a tracheal passage (15) inside. The bottom end of the esophageal passage (14) penetrates the bottom end of the housing (1), and the top end of the esophageal passage (14) penetrates the top end of the housing (1). The esophageal cannula (2) is slidably installed in the esophageal passage (14). The top end of the tracheal passage (15) penetrates the top end of the housing (1), and the bottom end of the tracheal passage (15) penetrates the inner side of the housing (1). The tracheal cannula (3) is slidably installed in the tracheal passage (15). The housing (1) has a sealing groove (16) located near the inner side. A sealing plate (17) is slidably installed inside the sealing groove (16). A retaining plate (18) is fixedly installed on the outer surface of the sealing plate (17) near the bottom. The retaining plate (18) is inclined outward. A through hole (19) is opened through the sealing plate (17). The through hole (19) is located above the retaining plate (18). The diameter of the through hole (19) is equal to the diameter of the tracheal passage (15).

2. The device for detecting tracheoesophageal fistula according to claim 1, characterized in that, The outer surface of the housing (1) is coaxially fixed with a first airbag (12) near the bottom. The housing (1) has a first inflation hole (13) inside. The bottom of the first inflation hole (13) is connected to the first airbag (12), and the top of the first inflation hole (13) passes through the top of the housing (1) and is connected to an external inflation device.

3. The device for detecting tracheoesophageal fistula according to claim 1, characterized in that, An esophageal guide head (20) is fixedly installed at the bottom end of the esophageal cannula (2). An installation hole (21) is coaxially opened at the bottom end of the esophageal guide head (20). The oxygen detector (4) is fixedly installed at the top of the installation hole (21). An installation plate (22) is fixedly installed inside the installation hole (21) near the bottom end. A ventilation hole (23) is opened through the installation plate (22). Inclined plates (24) are installed alternately on the inner surface of the installation hole (21). The inclined plates (24) are located between the oxygen detector (4) and the installation plate (22). A first camera (25) is fixedly installed on the lower surface of the installation plate (22). A first searchlight (26) is provided at the bottom end of the esophageal guide head (20).

4. The device for detecting tracheoesophageal fistula according to claim 1, characterized in that, The bottom end of the endotracheal tube (3) is fixedly installed with an endotracheal guide head (27). The second camera (6) and the second searchlight (7) are both fixedly installed at the bottom end of the endotracheal guide head (27). An installation cavity (28) is opened inside the endotracheal tube (3) near the bottom end. The guide ring (8) is fixedly installed in the installation cavity (28). Two control holes (29) are opened inside the endotracheal tube (3). The top ends of the two control pull ropes (10) pass through the two control holes (29) and extend to the outside of the endotracheal tube (3). A directional control hole (30) is opened inside the endotracheal tube (3). The bottom end of the directional control hole (30) is conical and communicates with the installation cavity (28). The top end of the directional control pull rope (11) passes through the directional control hole (30) and extends to the outside of the endotracheal tube (3).

5. The device for detecting tracheoesophageal fistula according to claim 1, characterized in that, The guide ring (8) has a notch, and the inside of the guide ring (8) has an internal groove (31). The internal groove (31) is connected to the bottom of the guide ring (8) through an extension groove (32). The guide block (9) has a sliding hole that matches the guide ring (8) through its middle position. The inner surface of the guide block (9) is fixedly mounted with an internal slider (34) through an extension plate (33). The internal slider (34) slides in the internal groove (31) through the extension plate (33), and the extension plate (33) slides in the extension groove (32). One end of each of the two control pull ropes (10) is fixedly connected to the two sides of the internal slider (34), and the other end of each of the two control pull ropes (10) extends out through the notch.

6. The device for detecting tracheoesophageal fistula according to claim 1, characterized in that, The esophageal cannula (2) has a second inflation hole (35) inside. The bottom end of the second inflation hole (35) is connected to the second air bag (5), and the top end of the second inflation hole (35) is connected to an external inflation device.

7. The device for detecting tracheoesophageal fistula according to claim 4, characterized in that, The endotracheal cannula (3) has an air supply hole (36) inside. The bottom end of the air supply hole (36) passes through the bottom end of the endotracheal guide head (27), and the top end of the air supply hole (36) passes through the top end of the endotracheal cannula (3).

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