Ventilation device for gastroscopy in anesthesia state

Abstract

The invention relates to a ventilation device for gastroscopy in an anesthesia state, belongs to the technical field of medical instruments, and solves the problems that in the prior art, a gastroscope access channel and an oxygen supply channel are parallel, the occupied space of the oropharynx is large, placement is inconvenient, oxygen supply cannot be effectively guaranteed, and oral cavity tissue is prone to being damaged. The device comprises a protection tube unit and a ventilation catheter, wherein the ventilation catheter is arranged on the protection tube unit; the protective tube unit is used for being connected to the outer wall of a gastroscope in a sleeving mode during gastroscopy, and the outer wall of the gastroscope is prevented from rubbing the throat of a patient. High-flow oxygen is input into the respiratory tract of a patient through the gap between the protective tube unit and the gastroscope, so that the patient can keep effective breathing. According to the ventilation device, an existing gastroscope access channel and an existing oxygen supply channel which are arranged side by side are improved into the mode that only one pipe is used for effective ventilation, the gastroscope body of the gastroscope and the throat of a patient can be isolated at the same time, the occupied space of the oropharynx is small, implantation is convenient, and tissue damage is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a ventilation device for gastroscopy under anesthesia. BACKGROUND

[0002] Painless gastroscopy requires anesthesia for patients. Anesthetic drugs can cause central respiratory depression, or tongue falling backward can cause airway obstruction, thereby causing hypoxia. Currently, the clinic mainly adopts the following solutions: stopping the operation, lifting the jaw to unblock the airway, and pressurizing the oxygen mask. However, a part of patients still need to use upper respiratory tract ventilation tools to relieve, such as a double-channel ventilation system, one channel for operating a gastrointestinal endoscope, and the other channel for ventilation. However, such tools have some shortcomings that need to be solved: such a system needs to simultaneously satisfy the gastroscopy inlet and outlet channels and the oxygen supply channel, has multiple parallel tubes, occupies a large space in the oropharynx, is inconvenient to place, and increases the possibility of tissue damage; such a tool also cannot increase the oxygen supply flow, and cannot provide high-flow oxygen therapy to effectively avoid hypoxia. SUMMARY

[0003] In view of the above problems of the prior art, the present application provides a ventilation device for gastroscopy under anesthesia, which solves the problems of parallel gastroscopy inlet and outlet channels, large space occupation in the oropharynx, inconvenience in placement, and easy to cause oral tissue damage in the prior art.

[0004] To achieve the above-mentioned application purposes, the technical scheme adopted by the present application is as follows:

[0005] The present application provides a ventilation device for gastroscopy under anesthesia, comprising a protective tube unit and a ventilation catheter, wherein the ventilation catheter is arranged on the protective tube unit; the protective tube unit is used to be sleeved on the outer wall of the gastroscope during gastroscopy, and is kept stationary at the throat of the patient to prevent the outer wall of the gastroscope from rubbing the throat of the patient; the ventilation catheter is used to input oxygen into the protective tube unit during gastroscopy, and input oxygen into the lungs of the patient through the gap between the protective tube unit and the gastroscope, so that the patient can maintain breathing.

[0006] Further, the protective tube unit comprises a protective tube body, which is used to be sleeved on the outer wall of the gastroscope during gastroscopy.

[0007] Further, the protective tube unit further comprises a first sealing ring and a second sealing ring, which are arranged at both ends of the protective tube body, respectively.

[0008] Further, the first sealing ring and the second sealing ring are both provided with a center through hole for passing through the lens body of the gastroscope.

[0009] Further, the inner diameter of the center through hole is equal to the outer diameter of the lens body of the gastroscope.

[0010] Further, the first sealing ring and the second sealing ring are both elastic sealing rings, and the inner diameter of the central through hole is less than or equal to the outer diameter of the scope body of the gastroscope.

[0011] Further, the ventilation conduit comprises a first ventilation pipe and a second ventilation pipe, and the first ventilation pipe is connected with the protector pipe body.

[0012] Further, the ventilation conduit comprises a first ventilation pipe and a second ventilation pipe, and the first ventilation pipe is connected with the protector pipe body.

[0013] Further, the ventilation conduit comprises a first ventilation pipe and a second ventilation pipe, and the first ventilation pipe is connected with the protector pipe body.

[0014] Further, the ventilation conduit comprises a first ventilation pipe and a second ventilation pipe, and the first ventilation pipe is connected with the protector pipe body.

[0015] Compared with the prior art, the ventilation device of the present application can achieve at least one of the following beneficial effects:

[0016] (1) The protector pipe unit of the ventilation device of the present application is used to be sleeved on the outer wall of the gastroscope during gastroscopy, and the ventilation conduit is used to input oxygen into the protector pipe unit during gastroscopy, and input oxygen into the lungs of the patient through the gap between the protector pipe unit and the gastroscope, so that the patient can maintain effective breathing. The ventilation conduit is not inserted into the oral cavity of the patient, and only the protector pipe body is inserted into the oral cavity of the patient. The ventilation device of the present application improves the existing parallel gastroscope inlet and outlet channel and oxygen supply channel to only use one pipe, which can isolate the scope body of the gastroscope and the throat of the patient, and can simultaneously ventilate, occupies small oral cavity space, is convenient to place, and reduces tissue damage.

[0017] (2) The ventilation device of the present application can achieve at least two states: 1) ventilation state, the three-way valve communicates the first ventilation pipe and the second ventilation pipe, and closes the suction conduit, the first ventilation pipe, the second ventilation pipe and the protector pipe unit form an air inlet channel, and high-flow oxygen is input into the lungs of the patient, so that the patient can maintain breathing; 2) suction state, the three-way valve communicates the first ventilation pipe and the suction conduit, and closes the second ventilation pipe, the suction unit, the protector pipe body, the first ventilation pipe and the suction conduit form a suction channel, and the saliva of the patient is sucked out of the oral cavity.

[0018] (3) The protruding block of the suction unit of the present application is a collapsible air bag, one end of the air bag conduit is connected with the protruding block, and the other end of the air bag conduit is connected with a separate inflation device; during intubation operation, the air bag is not inflated, and the protruding block is collapsed, facilitating intubation operation; after intubation, the air-liquid through hole is directly opposite the glottis, facilitating ventilation, and the air bag is inflated when suction is needed, the protruding block is shaped, and the air-liquid through hole can extend to the lower secretions, facilitating suction;

[0019] (4) When the air inlet blow pipe of the present application blows medical pure oxygen into the ventilation conduit, negative pressure is generated in the first air pipe and the second air pipe, air is sucked into the first air pipe and the second air pipe, and mixed with medical pure oxygen to enter the ventilation conduit, thereby increasing the flow of oxygen mixed gas input into the patient's lungs; the ventilation device of the present application can realize high-flow oxygen therapy function, without the need for additional special high-flow oxygen therapy equipment, relying on the ventilation device, connecting the clinical conventional anesthesia machine oxygen supply system, the function of greatly increasing the flow can be realized, and high-flow oxygen therapy is provided;

[0020] (5) The positioning unit of the ventilation device of the present application can be sleeved on the guard pipe unit and is used for fixing the position of the guard pipe unit in the oral cavity, preventing the depth of the guard pipe unit in the oropharynx from changing, the positioning sleeve of the positioning unit includes a sleeve body and a rotating shaft, the rotating shaft can be inserted into the rotating shaft slot, and the positioning sleeve can rotate in the guard sleeve around the rotating shaft; the bending arc of the oropharynx of different patients is different, the angle of the guard pipe body in the oral cavity is also different after the guard pipe unit is inserted into the oropharynx of the patient, because the setting angle of the guard sleeve in the oral cavity of the patient is fixed, the positioning sleeve which can rotate in the guard sleeve makes the ventilation device of the present application applicable to different patients;

[0021] (6) The clamping piece of the present application includes a clamping spring and a lever, one end of the clamping spring is connected with the inner wall of the positioning sleeve, the other end of the clamping spring is connected with the lever, the clamping spring is used for sleeving with the guard pipe body and clamping the guard pipe body, preventing the guard pipe unit from moving axially and positioning the insertion depth of the guard pipe unit into the oropharynx; the lever protrudes from the end of the sleeve body, the user can adjust the insertion depth of the guard pipe unit into the oropharynx by pulling the lever to expand the clamping spring and separate the clamping spring from the guard pipe body, and the guard pipe unit can move axially.

[0022] In the present application, the above technical solutions can be combined with each other to realize more preferred combination schemes. Other features and advantages of the present application will be described in the following content, and some advantages will become apparent from the description or be understood through the implementation of the present application. The purposes and other advantages of the present application can be realized and obtained from the content specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Fig. 1 is a schematic view of the overall structure of the ventilation device of Example 1;

[0024] Figure 2 Fig. 2 is a schematic view of the overall structure of the ventilation device of Example 2;

[0025] Figure 3 Fig. 3 is a schematic view of the cross section of the reinforcing unit;

[0026] Figure 4 Fig. 4 is a schematic view of the overall structure of the positioning unit;

[0027] Figure 5 Fig. 5 is a schematic view of the cross section of the positioning assembly.

[0028] Reference signs:

[0029] 1 - tube protecting unit; 2 - ventilation catheter; 3 - suction unit; 4 - three-way valve; 5 - suction catheter; 6 - reinforcing unit; 7 - positioning unit; 11 - tube body; 12 - first sealing ring; 21 - first ventilation tube; 22 - second ventilation tube; 31 - protrusion; 32 - gas-liquid through hole; 61 - reinforcing body; 62 - air inlet blowpipe; 63 - first air duct; 64 - second air duct; 71 - tooth protecting sleeve; 72 - positioning sleeve; 73 - clamping member; 74 - retaining ring; 721 - sleeve body; 722 - rotating shaft; 731 - clamping spring; 732 - lever. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application are described below to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, any changes that are obvious within the spirit and scope of the present application as defined and determined by the appended claims are within the scope of the present application.

[0031] Example 1:

[0032] One specific embodiment of the present application, as shown in Figure 1 A ventilation device (hereinafter referred to as ventilation device) for gastroscopy under anesthesia, comprising a tube protecting unit 1 and a ventilation catheter 2, the ventilation catheter 2 being arranged on the tube protecting unit 1. The tube protecting unit 1 is used to be sleeved on the outer wall of a gastroscope during gastroscopy, and to be kept stationary at the throat of a patient, thereby preventing the outer wall of the gastroscope from rubbing against the throat of the patient; the ventilation catheter 2 is used to input oxygen into the tube protecting unit 1 during gastroscopy, and to input oxygen into the lungs of the patient through the gap between the tube protecting unit 1 and the gastroscope, so that the patient can maintain respiration.

[0033] Preferably, the tube protection unit 1 comprises a tube body 11, which has the same curvature as the curvature of the pharynx of the human body. The tube body 11 is used to cover the outer wall of the gastroscope during gastroscopy, and to keep the patient's throat in place to prevent the outer wall of the gastroscope from rubbing against the patient's throat. The ventilation catheter 2 is arranged on the outer wall of the tube body 11, and the ventilation catheter 2 is not inserted into the patient's oral cavity, only the tube body 11 is inserted into the patient's oral cavity. The ventilation device of the present embodiment improves the existing parallel gastroscope access channel and oxygen supply channel to only use one tube, which can isolate the gastroscope body from the patient's throat, and can simultaneously perform effective ventilation, has a small oral cavity space, is easy to place, and reduces tissue damage.

[0034] Preferably, in order to prevent the gastroscope from bringing indoor dust into the patient's body, or to prevent the gas sent into the patient's body from overflowing out of the body, the tube protection unit 1 further comprises a first sealing ring 12 and a second sealing ring (not shown in the figure), which are arranged at both ends of the tube body 11. The first sealing ring 12 and the second sealing ring are both provided with a central through hole for passing through the gastroscope body. The first sealing ring 12 and the second sealing ring are used to prevent gas from entering the patient's esophagus through the tube body 11 and overflowing out of the body.

[0035] In some optional embodiments, the inner diameter of the central through hole is equal to the outer diameter of the gastroscope body. The attachments on the outer wall of the gastroscope body can be blocked by the first sealing ring 12 and the second sealing ring, and the gastroscope cannot bring indoor dust into the patient's body, or bring liquid in the patient's digestive tract out.

[0036] In some optional embodiments, the first sealing ring 12 and the second sealing ring are both elastic sealing rings, the inner diameter of the central through hole is less than or equal to the outer diameter of the gastroscope body, and the inner wall of the central through hole can tightly abut against the inner wall of the gastroscope body. The attachments on the outer wall of the gastroscope body can be blocked by the first sealing ring 12 and the second sealing ring, and the gastroscope cannot bring indoor dust into the patient's body, or bring liquid in the patient's digestive tract out.

[0037] Preferably, as shown in Figure 1 The ventilation catheter 2 comprises a first ventilation tube 21 and a second ventilation tube 22, and the first ventilation tube 21 is connected with the tube body 11.

[0038] In some optional embodiments, in order to attract saliva in the oral cavity and prevent saliva from gathering and entering the glottis, the ventilation device of the present embodiment further comprises a suction unit 3, a three-way valve 4 and a suction catheter 5. The suction unit 3 is arranged on the outer wall of the tube body 11, the three-way valve 4 is arranged on the ventilation catheter 2, two open ends of the three-way valve 4 are respectively connected with the first ventilation tube 21 and the second ventilation tube 22, and the suction catheter 5 is connected with the third open end of the three-way valve 4. The suction catheter 5 is used to connect an independent medical suction device.

[0039] Preferably, the ventilation device of the present embodiment can realize at least two states: 1) ventilation state, the three-way valve 4 connects the first ventilation tube 21 and the second ventilation tube 22, and closes the suction guide tube 5, the first ventilation tube 21, the second ventilation tube 22 and the tube body 11 form an air inlet channel, and oxygen is input into the patient's lungs, so that the patient can maintain breathing; 2) suction state, the three-way valve 4 connects the first ventilation tube 21 and the suction guide tube 5, and closes the second ventilation tube 22, the suction unit 3, the tube body 11, the first ventilation tube 21 and the suction guide tube 5 form a suction channel, and the patient's saliva is sucked out of the oral cavity.

[0040] Specifically, in order to be suitable for the structure of the oropharynx and realize the suction of saliva, the suction unit 3 comprises a protrusion 31 and a gas-liquid through hole 32, the protrusion 31 is arranged on the outer wall of the tube body 11, and the gas-liquid through hole 32 is arranged on the protrusion 31, and the gas-liquid through hole 32 is used to connect the tube body 11 and the low-lying secretions of the patient. When the ventilation device of the present embodiment is in the ventilation state, the gas-liquid through hole 32 can guide the gas in the air inlet channel into the glottis of the patient; when the ventilation device of the present embodiment is in the suction state, the gas-liquid through hole 32 can guide the liquid near the glottis into the suction channel and discharge it.

[0041] Specifically, the protrusion 31 is arranged on the outer wall of the inner concave arc surface of the tube body 11, and is arranged at the end of the tube body 11 away from the ventilation tube 2. During gastroscopy, the gas-liquid through hole 32 can be directly opposite the glottis, preventing the gas from being sent into the esophagus.

[0042] In order to facilitate the insertion operation of the suction unit 3 in the oropharynx, preferably, the suction unit 3 further comprises a gas bag guide tube 33, the protrusion 31 is a collapsible gas bag, one end of the gas bag guide tube 33 is connected with the protrusion 31, and the other end of the gas bag guide tube 33 is connected with a separate inflation device. During intubation, the gas bag is not inflated, and the protrusion 31 is contracted, facilitating intubation; after intubation, the gas-liquid through hole is directly opposite the glottis, facilitating ventilation, and the gas bag is inflated when suction is needed, the protrusion is shaped, and the gas-liquid through hole can extend to the low-lying secretions, facilitating suction;

[0043] The tube unit 1 of the ventilation device in the embodiment is used to be sleeved on the outer wall of the gastroscope during the gastroscope examination, the ventilation catheter 2 is used to input oxygen into the tube unit 1 during the gastroscope examination, and the oxygen is input into the lungs of the patient through the gap between the tube unit 1 and the gastroscope, so that the patient can keep breathing. The ventilation catheter 2 is arranged on the outer wall of the tube body 11, the ventilation catheter 2 is not inserted into the oral cavity of the patient, and only the tube body 11 is inserted into the oral cavity of the patient. The ventilation device in the embodiment improves the existing parallel gastroscope inlet and outlet channel and oxygen supply channel to only use one tube, so that the mirror body of the gastroscope and the throat of the patient can be isolated, and effective ventilation can be performed at the same time. The space of the oral cavity is small, the insertion is convenient, and the tissue damage is reduced. The ventilation device in the embodiment can realize at least two states: 1) ventilation state, the three-way valve 4 is connected with the first ventilation pipe 21 and the second ventilation pipe 22, and the suction catheter 5 is closed, the first ventilation pipe 21, the second ventilation pipe 22 and the tube unit 1 form an air inlet channel, and the oxygen is input into the lungs of the patient, so that the patient can keep breathing; 2) suction state, the three-way valve 4 is connected with the first ventilation pipe 21 and the suction catheter 5, and the second ventilation pipe 22 is closed, the suction unit 3, the tube body 11, the first ventilation pipe 21 and the suction catheter 5 form a suction channel, and the saliva of the patient is sucked out of the oral cavity; the protruding block 31 is a collapsible air bag, one end of the air bag catheter 33 is connected with the protruding block 31, and the other end of the air bag catheter 33 is connected with a separate inflation device. During the intubation operation, the air bag is not inflated, the protruding block 31 is contracted, and the intubation operation is facilitated; after the intubation is in place, the air-liquid through hole is opposite the supraglottic, the ventilation is facilitated, the air bag is inflated when suction is required, the protruding block 31 is shaped, and the air-liquid through hole 32 can be extended to the lower secretions, so that the suction is facilitated.

[0044] Embodiment 2

[0045] In order to increase the flow of oxygen mixed gas input into the lungs of the patient, as shown in the embodiment, the reinforcing unit 6 is added on the basis of the embodiment 1, the reinforcing unit 6 is connected with the ventilation catheter 2, and is used to increase the flow of oxygen mixed gas input into the lungs of the patient. Figure 2 Specifically, as shown in the embodiment, the reinforcing unit 6 comprises a reinforcing body 61 and an air inlet blowing pipe 62, one end of the reinforcing body 61 is connected with the ventilation catheter 2, and the other end of the reinforcing body 61 is connected with the air inlet blowing pipe 62. One end of the air inlet blowing pipe 62 connected with the reinforcing body 61 is an air outlet, the air outlet is not connected with the end of the ventilation catheter 2, and the air inlet blowing pipe 62 is coaxial with the ventilation catheter 2. The air inlet blowing pipe 62 is used to blow medical pure oxygen to the ventilation catheter 2, the air is mixed with the medical pure oxygen through the reinforcing body 61 and enters the ventilation catheter 2, and the flow of oxygen mixed gas input into the lungs of the patient is increased.

[0046] Figure 3

[0047] ​​The inner diameter of the open end of the air inlet blowing pipe 62 is smaller than the inner diameter of the pipe body part, so as to facilitate the mixing of external air and medical pure oxygen, further improve the flow and delivery efficiency of the oxygen mixture, ensure that the patient maintains a stable blood oxygen level during the examination, and at the same time reduces the physiological risk caused by hypoxia.

[0048] Preferably, the reinforcing unit 6 further comprises a first air pipe 63 and a second air pipe 64, both of which are arranged on the reinforcing body 61, and the first air pipe 63 and the second air pipe 64 are arranged in a V shape, one end of the first air pipe 63 and the second air pipe 64 is connected with the ventilation catheter 2, and the other end of the first air pipe 63 and the second air pipe 64 is symmetrically arranged on both sides of the air inlet blowing pipe 62. When the air inlet blowing pipe 62 blows medical pure oxygen to the ventilation catheter 2, negative pressure is generated in the first air pipe 63 and the second air pipe 64, air is sucked into the first air pipe 63 and the second air pipe 64, and mixed with medical pure oxygen into the ventilation catheter 2, thereby increasing the flow of oxygen mixture into the patient's lungs.

[0049] The inlets of the first air pipe 63 and the second air pipe 64 are provided with control valves for opening and closing the first air inlet passage 33 and the second air inlet passage 34, and controlling the air inlet flow of the first air pipe 63 and the second air pipe 64. When closed, the reinforcing unit 6 provides pure oxygen, and when opened, it provides oxygen with higher flow and adjustable concentration.

[0050] The ventilation device of the embodiment can realize high-flow oxygen therapy function, without the help of additional special high-flow oxygen therapy equipment. By connecting the clinical conventional anesthesia machine oxygen supply system, the ventilation device can realize the function of greatly increasing the flow and provide high-flow oxygen therapy.

[0051] Through experimental verification, the comparison of oxygen flow and oxygen mixture flow is shown in Table 1:

[0052] Table 1: Comparison of oxygen flow, patient inhaled oxygen concentration and oxygen mixture flow

[0053]

[0054] Compared with Example 1, when the air inlet blowing pipe 62 blows medical pure oxygen to the ventilation catheter 2, negative pressure is generated in the first air pipe 63 and the second air pipe 64, air is sucked into the first air pipe 63 and the second air pipe 64, and mixed with medical pure oxygen into the ventilation catheter 2, thereby increasing the flow of oxygen mixture into the patient's lungs. The ventilation device of the embodiment can realize high-flow oxygen therapy function, without the help of additional special high-flow oxygen therapy equipment. By connecting the clinical conventional anesthesia machine oxygen supply system, the ventilation device can realize the function of greatly increasing the flow and provide high-flow oxygen therapy.

[0055] Embodiment 3

[0056] In the anesthetic state, the patient cannot independently keep the ventilation device stable, in order to keep the positioning of the tube unit 1 and the oral cavity, prevent the depth change of the tube unit 1 in the oropharynx, such as Figure 2 As shown in the embodiment, the positioning unit 7 is added on the basis of the embodiment 1 or 2, the positioning unit 7 can be sleeved on the tube unit 1, and is used for fixing the position of the tube unit 1 in the oral cavity, preventing the depth change of the tube unit 1 in the oropharynx.

[0057] Specifically, as shown in the figure, Figure 4 The positioning unit 7 includes a tooth guard 71 and a positioning assembly connected with the tooth guard 71. The tooth guard 71 is used to be arranged between the upper and lower teeth of the patient during gastroscopy, preventing the teeth of the patient from contacting the gastroscope; the positioning assembly is used to be sleeved on the outer wall of the tube body 11, and the tube body 11 can change the angle with the tooth guard 71 according to the curvature of the oropharynx of the patient.

[0058] Preferably, as shown in the figure, Figure 5 The positioning assembly includes a positioning sleeve 72 and a clamping piece 73, the positioning sleeve 72 is rotationally connected with the tooth guard 71, and the clamping piece 73 is arranged on the positioning sleeve 72 and used to clamp the tube body 11.

[0059] Preferably, as shown in the figure, Figure 5 The positioning sleeve 72 includes a sleeve body 721 and a rotating shaft 722, the rotating shaft 722 is arranged on the outer wall of the sleeve body 721, the inner wall of the tooth guard 71 is provided with a rotating shaft groove (not shown in the figure), the rotating shaft 722 can be inserted into the rotating shaft groove, and the positioning sleeve 72 can rotate in the tooth guard 71 around the rotating shaft 722. The bending curvatures of the oropharynx of different patients are different, the angle of the tube body 11 in the oral cavity is also different after the tube unit 1 is inserted into the oropharynx of the patient, because the setting angle of the tooth guard 71 in the oral cavity of the patient is fixed, the positioning sleeve 72 which can rotate in the tooth guard 71 makes the ventilation device of the embodiment applicable to different patients.

[0060] Preferably, the clamping piece 73 includes a clamping spring 731 and a push rod 732, one end of the clamping spring 731 is connected with the inner wall of the positioning sleeve 72, the other end of the clamping spring 731 is connected with the push rod 732, the clamping spring 731 is used to be sleeved with the tube body 11 and clamp the tube body 11, preventing the axial movement of the tube unit 1 and positioning the insertion depth of the tube unit 1 into the oropharynx; the push rod 732 protrudes from the end of the sleeve body 721, the user can adjust the insertion depth of the tube unit 1 into the oropharynx by pushing the push rod 732, thereby stretching the clamping spring 731 and separating from the tube body 11, and the tube unit 1 can move axially.

[0061] Preferably, as shown in the figure, Figure 4As shown, the positioning unit 7 further comprises a guard ring 74 arranged at the end of the guard sleeve 71, which is used to connect with the lips of the patient to prevent the guard sleeve 71 from entering the oral cavity. The positioning unit 7 further comprises a rope sleeve (not shown in the figure), which can be connected with the guard ring 74 and is used to bind the head of the patient to fix the position of the positioning unit 7 in the oral cavity.

[0062] Compared with the embodiments 1 or 2, the positioning unit 7 of the ventilation device of the present embodiment can be sleeved on the guard tube unit 1 and is used to fix the position of the guard tube unit 1 in the oral cavity to prevent the depth of the guard tube unit 1 in the oropharynx from changing. The positioning sleeve 72 comprises a sleeve body 721 and a rotating shaft 722, the rotating shaft 722 can be inserted into the rotating shaft slot, and the positioning sleeve 72 can rotate in the guard sleeve 71 around the rotating shaft 722. The bending arc of the oropharynx of different patients is different, and the angle of the guard tube body 11 in the oral cavity is also different after the guard tube unit 1 is inserted into the oropharynx of the patient. Since the setting angle of the guard sleeve 71 in the oral cavity of the patient is fixed, the positioning sleeve 72 which can rotate in the guard sleeve 71 makes the ventilation device of the present embodiment suitable for different patients. The clamping member 73 comprises a clamping spring 731 and a push rod 732, one end of the clamping spring 731 is connected with the inner wall of the positioning sleeve 72, and the other end of the clamping spring 731 is connected with the push rod 732. The clamping spring 731 is used to sleeve and clamp the guard tube body 11 to prevent the axial movement of the guard tube unit 1 and to position the depth of the guard tube unit 1 inserted into the oropharynx. The push rod 732 protrudes from the end of the sleeve body 721, and the user can adjust the depth of the guard tube unit 1 inserted into the oropharynx by pushing the push rod 732 to expand the clamping spring 731 and separate the clamping spring 731 from the guard tube body 11, so that the guard tube unit 1 can move axially.

[0063] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily thought by those skilled in the art, which should be covered within the protection scope of the present application.

Claims

1. A ventilation device for gastroscopy under anesthesia, characterized in that, The device includes a protective tube unit (1) and a ventilation tube (2), wherein the ventilation tube (2) is disposed on the protective tube unit (1); the protective tube unit (1) is used to fit onto the outer wall of the endoscope during gastroscopy and remain stationary in the patient's throat area to prevent the outer wall of the endoscope from rubbing against the patient's throat; the ventilation tube (2) is used to introduce oxygen into the protective tube unit (1) during gastroscopy and to introduce oxygen into the patient's lungs through the gap between the protective tube unit (1) and the endoscope, so that the patient can maintain breathing.

2. The ventilation device for gastroscopy under anesthesia according to claim 1, characterized in that, The tube protector unit (1) includes a tube protector body (11), which is used to cover the outer wall of the endoscope during gastroscopy.

3. The ventilation device for gastroscopy under anesthesia according to claim 2, characterized in that, The protective tube unit (1) further includes a first sealing ring (12) and a second sealing ring, which are respectively disposed at both ends of the protective tube body (11).

4. The ventilation device for gastroscopy under anesthesia according to claim 3, characterized in that, Both the first sealing ring (12) and the second sealing ring are provided with a central through hole, which is used for the endoscope body to pass through.

5. The ventilation device for gastroscopy under anesthesia according to claim 4, characterized in that, The inner diameter of the central through-hole is equal to the outer diameter of the endoscope body.

6. The ventilation device for gastroscopy under anesthesia according to claim 4, characterized in that, Both the first sealing ring (12) and the second sealing ring are elastic sealing rings, and the inner diameter of the central through hole is less than or equal to the outer diameter of the endoscope body.

7. The ventilation device for gastroscopy under anesthesia according to claim 2, characterized in that, The ventilation tube (2) includes a first ventilation tube (21) and a second ventilation tube (22).

8. The ventilation device for gastroscopy under anesthesia according to claim 7, characterized in that, It also includes a suction unit (3), a three-way valve (4) and a suction conduit (5). The suction unit (3) is disposed on the outer wall of the protective tube body (11). The three-way valve (4) is disposed on the ventilation conduit (2). The two open ends of the three-way valve (4) are respectively connected to the first ventilation tube (21) and the second ventilation tube (22). The suction conduit (5) is connected to the third open end of the three-way valve (4).

9. The ventilation device for gastroscopy under anesthesia according to claim 8, characterized in that, The three-way valve (4) connects the first ventilation tube (21) and the second ventilation tube (22) and closes the suction conduit (5). The first ventilation tube (21), the second ventilation tube (22) and the tube protector unit (1) form an air intake channel to deliver oxygen into the patient's lungs, enabling the patient to maintain breathing.

10. The ventilation device for gastroscopy under anesthesia according to claim 8, characterized in that, The three-way valve (4) connects the first ventilation tube (21) and the suction catheter (5) and closes the second ventilation tube (22). The suction unit (3), the tube body (11), the first ventilation tube (21) and the suction catheter (5) form a suction channel to draw the patient's saliva out of the pharynx.

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