A nasally visualized sputum suction placement system

Abstract

The present application relates to a kind of nasal visualization sputum suction insertion system, belong to medical instrument technical field, solve the low success rate of insertion in prior art, sputum suction is not complete.The nasal visualization sputum suction insertion system includes: insertion tube, control module, display screen, elastic deformation structure, terminal sputum suction structure and miniature camera;The terminal sputum suction structure is provided with multiple sputum suction holes, and miniature camera is embeddedly installed;Display screen is arranged on the control module;The terminal sputum suction structure is communicated with one end of insertion tube by elastic deformation structure;The control module is used to control the bending of elastic deformation structure and then control the orientation adjustment of terminal sputum suction structure;The side of the insertion tube is provided with sputum suction tube interface capable of being connected with external negative pressure suction device.The present application realizes the visualized insertion of tracheal sputum suction tube, improves the success rate of intubation and the multi-angle adjustment of sputum suction direction, and can effectively suck off the sputum attached to tracheal wall.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a nasal visual suction insertion system. Background Technology

[0002] Currently, patients with poor non-artificial airway clearance require nasal suctioning to assist in sputum suction. Common nasotracheal suctioning devices include: disposable ordinary suction catheters, closed suction catheters, and fiberoptic bronchoscopy-assisted suctioning devices. Disposable ordinary suction catheters are the most common, usually made of plastic or silicone. They are typically long and thin tubes with side holes at the tip. Connected to a negative pressure suction device, they are inserted into the trachea through the nasal cavity, using negative pressure to suction out sputum. Closed suction catheters are primarily used for patients requiring mechanical ventilation. They consist of a suction tube, protective sleeve, and flushing device. During suctioning, the patient's airway is relatively isolated from the external environment, reducing the risk of exogenous infection. Fiberoptic bronchoscopy-assisted suctioning devices use a fiberoptic bronchoscope as the core device. Its flexible and bendable endoscope allows for deep insertion into the trachea. After insertion through the nasal cavity, sputum is suctioned out using the suction port. This device can obtain relatively accurate information about respiratory tract lesions and is suitable for patients with thick sputum, difficulty in routine sputum suction, or those who need airway examination, but it is expensive.

[0003] However, due to the complex structure of the nasal cavity, existing suction catheter devices have a low success rate in single-pass insertion into the airway when not under visual guidance, making the insertion process complex. Existing suction catheter devices also suffer from low insertion success rates, leading to easy damage and bleeding of the nasal mucosa; incomplete sputum removal, with sputum residue remaining in the airway; interruptions due to coughing or significant patient movements; and high costs, hindering widespread adoption in medical systems. To address these issues, this invention proposes a transnasal visual suction insertion system. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a transnasal visual suction insertion system to solve the problems of low insertion success rate, incomplete suction, poor stability and high cost of existing suction devices.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A transnasal visual suction insertion system includes: an insertion tube, a control module, a display screen, an elastic deformable structure, a terminal suction structure, and a miniature camera;

[0007] The end suction structure has a suction chamber inside and multiple suction holes communicating with the suction chamber are arranged circumferentially; a miniature camera is embedded in the end of the end suction structure; the control module is equipped with a display screen for displaying images captured by the miniature camera.

[0008] The distal suction structure is connected to one end of the insertion tube via an elastic deformation structure, and the control module is provided at the other end of the insertion tube; the control module is used to control the elastic deformation structure to bend and deform, thereby controlling the distal suction structure to adjust its position; the side of the insertion tube is provided with a suction tube interface that can be connected to an external negative pressure suction device.

[0009] Furthermore, the elastic deformable structure includes: a suction tube, an air chamber diaphragm, and an elastic outer cover; the elastic outer cover is fitted over the outside of the suction tube, and its two ends are respectively connected to an insertion tube and a terminal suction structure; an annular air chamber is formed between the elastic outer cover and the suction tube.

[0010] Furthermore, the air chamber diaphragm is provided with four circumferential lines on the outside of the suction tube, and the outside of the air chamber diaphragm is connected to the elastic outer cover, dividing the annular air chamber into four fan-shaped air chambers; the end of the insertion tube is provided with four inflation holes, and the inflation holes are respectively connected to the four fan-shaped air chambers for inflating the fan-shaped air chambers, and the fan-shaped air chambers bend and deform after being inflated.

[0011] Furthermore, a serpentine deformable element is provided inside the fan-shaped air cavity; the serpentine deformable element is used to realize the springback of the elastic deformation structure and limit the maximum deformation of the elastic deformation structure.

[0012] Furthermore, the suction tube has a flexible tube section in the middle, and when the fan-shaped air chamber is inflated and deformed, the suction tube bends and deforms at the flexible tube section.

[0013] Furthermore, the outer surface of the elastic cover is configured with an annular pleated structure, which can extend or contract itself.

[0014] Furthermore, the elastic outer cover is provided with four elastic protrusions extending along its own axis, and the elastic protrusions are fixed to the air cavity diaphragm by bonding or integral molding.

[0015] Furthermore, the control module includes: a control circuit board, a miniature air pump, and four solenoid valves; the miniature air pump is connected to the four solenoid valves; the insertion tube has four air passages and / or inflation tubes inside, and the solenoid valves are connected to the inflation holes through the air passages and / or inflation tubes; the control circuit board controls the switching of the four solenoid valves to realize independent inflation and deflation of the four fan-shaped air chambers.

[0016] Furthermore, a control handle is provided on the side of the control module; the control handle is provided with four control buttons, which are used to control the status of the four solenoid valves respectively.

[0017] Furthermore, the suction hole is a drum-shaped hole that gradually narrows in the middle and widens at both ends.

[0018] The technical solution of this invention can achieve at least one of the following effects:

[0019] 1. The nasal visualization suction insertion system of the present invention has a miniature camera at the end and a display screen on the external control module to display the intubation process and the status of the suction tube inside the airway. It can dynamically observe the intubation position, improve the success rate of intubation, adjust the operation in time, and reduce the risk of damage to the nasal mucosa. The built-in camera can also transmit airway images in real time, clearly display the position and shape of sputum, and improve the accuracy of suctioning through observation.

[0020] 2. Existing suction catheters tend to have the tube tip stick to one side of the airway wall during suctioning, failing to fully contact sputum dispersed in different areas of the airway. This invention, by setting up four independent air chambers, allows for adjustment of the suction angle in four directions (front, back, left, and right) of the terminal suction structure through inflation of the air chambers. Combined with the suction holes circumferentially located on the terminal suction structure, this improves sputum adsorption efficiency. The bending of the bend section driven by air pressure ensures that the side holes are precisely aligned with the sputum accumulation area, enhancing the effectiveness of negative pressure adsorption, reducing sputum residue on the tracheal wall due to improper angle, and alleviating the patient's dyspnea symptoms.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0023] Figure 1 This is a schematic diagram of the nasal visual suction insertion system of the present invention - perspective one;

[0024] Figure 2 This is a schematic diagram of the transnasal visual suction and insertion system of the present invention - perspective two;

[0025] Figure 3 This is a schematic diagram of the insertion state of the nasal visual suction insertion system of the present invention;

[0026] Figure 4 This is a schematic diagram of the positioning status of the nasal visual suction insertion system of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the bent tube section of the nasal visual suction insertion system of the present invention;

[0028] Figure 6 This is a schematic diagram showing the installation state of the serpentine deformable component of the nasal visual suction insertion system of the present invention.

[0029] Figure 7 This is a schematic diagram of the internal structure of the end suction structure of the transnasal visual suction insertion system of the present invention;

[0030] Figure 8 This is a schematic diagram of the positioning ring of the nasal visual suction insertion system of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the elastic outer cover of the transnasal visual suction insertion system of the present invention.

[0032] Figure label:

[0033] 1-Insertion tube; 2-Control module; 3-Display screen; 4-Control button; 5-Press handle; 6-Control handle; 7-Positioning hoop; 8-Elastic outer cover; 9-End suction structure; 10-Miniature camera; 11-Suction tube interface; 12-Suction hole; 13-Pull cable; 14-Inflation hole; 15-Air chamber diaphragm; 16-Tubular section; 17-Elastic ridge; 18-Suction chamber; 19-Suction tube; 20-Serpentine deformable part; 71-Upper hoop; 72-Elastic rib; 73-Bone-shaped protrusion; 74-Lower hoop. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0035] Example 1

[0036] One specific embodiment of the present invention discloses a transnasal visual suctioning and insertion system, such as... Figure 1 , Figure 2 As shown, it includes: an insertion tube 1, a control module 2, a display screen 3, an elastic deformation structure, a terminal suction structure 9, and a miniature camera 10; the terminal suction structure 9 has a suction cavity 18 inside, and multiple suction holes 12 communicating with the suction cavity 18 are arranged circumferentially; the miniature camera 10 is embedded in the end of the terminal suction structure 9; the control module 2 is provided with a display screen 3 for displaying images captured by the miniature camera 10.

[0037] Specifically, the connection cable of the miniature camera 10 can be routed inside the insertion tube 1, and then connected to the display screen 3 on the control module 2 to display the internal image. Alternatively, a Bluetooth wireless camera with a built-in button battery can also be used.

[0038] The terminal suction structure 9 is connected to one end of the insertion tube 1 through an elastic deformation structure, and the other end of the insertion tube 1 is provided with the control module 2; the control module 2 is used to control the elastic deformation structure to bend and deform, thereby controlling the terminal suction structure 9 to adjust its position; the side of the insertion tube 1 is provided with a suction tube interface 11 that can be connected to an external negative pressure suction device.

[0039] In this embodiment, the elastic deformation structure includes: a suction tube 19, an air chamber diaphragm 15, and an elastic outer cover 8; the elastic outer cover 8 is sleeved on the outside of the suction tube 19, and its two ends are respectively connected to the insertion tube 1 and the end suction structure 9; an annular air chamber is formed between the elastic outer cover 8 and the suction tube 19.

[0040] Specifically, such as Figure 5 As shown, the air chamber diaphragm 15 has four circumferentially arranged on the outer side of the suction tube 19, and the outer side of the air chamber diaphragm 15 is connected to the elastic outer cover 8, dividing the annular air chamber into four fan-shaped air chambers; the end of the insertion tube 1 is provided with four inflation holes 14, and the inflation holes 14 are respectively connected to the four fan-shaped air chambers for inflating the fan-shaped air chambers. The fan-shaped air chambers bend and deform after being inflated.

[0041] Preferably, the air chamber diaphragm 15 is made of plastic or silicone material that is prone to elastic deformation.

[0042] Furthermore, such as Figure 6 As shown, a serpentine deformable element 20 is provided inside the fan-shaped air cavity; the serpentine deformable element 20 is used to realize the rebound of the elastic deformation structure and limit the maximum deformation of the elastic deformation structure. Specifically, by providing the serpentine deformable element 20, when the fan-shaped air cavity of the elastic deformation structure switches to the deflation state after inflation and expansion, the deflation process of the fan-shaped air cavity can be promoted by the self-resetting action of the serpentine deformable element 20.

[0043] Preferably, the serpentine deformable part 20 is made of metal.

[0044] In this embodiment, as Figure 5 , Figure 6 As shown, a flexible tube section 16 is provided in the middle of the suction tube 19. When the fan-shaped air chamber is inflated and deformed, the suction tube 19 bends and deforms at the flexible tube section 16.

[0045] Preferably, the hose segment 16 shown adopts a double-layer structure consisting of a spiral metal outer tube and a plastic film inner tube; this allows the hose segment 16 to bend when the elastic telescopic structure composed of the serpentine deformable part 20 and the elastic outer cover 8 is stretched when it is inflated inside the fan-shaped cavity, ultimately achieving the bending effect of the elastic deformation structure.

[0046] like Figure 9 As shown, the outer surface of the elastic outer cover 8 is configured with an annular pleated structure, which can extend or contract. The elastic outer cover 8 is provided with four elastic protrusions 17 extending along its own axis, and the elastic protrusions 17 are fixed to the air cavity diaphragm 15 by bonding or integral molding.

[0047] Preferably, the length of the flexible tube segment 16 is less than or equal to one-third of the length of the elastic outer cover 8. Specifically, the suction tube 19 and the insertion tube 1 are made of flexible rubber tubing, the flexible tube segment 16 is made of flexible silicone tubing, and the end suction structure 9 is made of relatively rigid plastic.

[0048] In this embodiment, by setting the length and position of the flexible tube segment 16 to match the length and position of the elastic outer cover 8, an arc-shaped bending deformation centered on the flexible tube segment 16 occurs during the inflation and expansion of the fan-shaped air chamber, forming a ball-joint-like structure (not a real ball joint) based on shape deformation, thereby realizing the adjustment of the suction direction of the end suction structure 9, and enabling multi-directional bending and turning as well as continuous suction.

[0049] This invention, by setting the elastic outer cover 8 as a ring-shaped pleated structure in conjunction with the internal serpentine deformable component 20, can, on the one hand, realize the overall bending of the elastic deformable structure to adjust the suction position, and on the other hand, improve the controllability of the deformation direction of the elastic deformable structure and avoid torsional deformation of the elastic deformable structure.

[0050] Furthermore, since the annular air bladder composed of the suction tube 19 and the elastic outer cover 8 is divided into four fan-shaped air chambers by the spacer action of the air chamber diaphragm 15, and the four fan-shaped air chambers are inflated separately, the terminal suction structure 9 can be bent in four directions: "front, back, left, and right". When two adjacent fan-shaped air chambers in the four fan-shaped air chambers are inflated simultaneously, a "45°" tilt direction can be achieved, that is, bending in four directions: "left front", "right front", "left back", and "right back". In other words, when the four fan-shaped air chambers are the first air chamber, the second air chamber, the third air chamber, and the fourth air chamber, the serpentine deformation member 20 inside is extended by independently driving the inflation, so that the end suction structure 9 can bend in the four directions of "left, front, right, and back" in sequence (the orientation of the inflation air chamber and the orientation of the bending direction are opposite). By simultaneously inflating the first and second air chambers, the bending in the left front position can be achieved. Similarly, the bending in the "right front", "left back", and "right back" directions can be achieved. Therefore, the end suction structure 9 of the present invention can achieve bending control in a total of 8 directions, so as to achieve accurate suction of the tracheal sidewall.

[0051] Furthermore, the control module 2 includes: a control circuit board, a micro air pump, and four solenoid valves; the micro air pump is connected to the four solenoid valves; the insertion tube 1 is provided with four air passages and / or inflation tubes, and the solenoid valves are connected to the inflation port 14 through the air passages and / or inflation tubes; the control circuit board controls the switching of the four solenoid valves to realize independent inflation and deflation of the four fan-shaped air chambers.

[0052] Specifically, the solenoid valve is a two-position three-way solenoid valve. By switching the position of the solenoid valve, the air passage / air tube inside the insertion tube 1 can be filled or vented.

[0053] Furthermore, a control handle 6 is installed on the side of the control module 2. Four control buttons 4 are set on the control handle 6. The control buttons 4 are used to switch the position of the solenoid valve. In use, by pressing different control buttons 4, the air is inflated or deflated in different fan-shaped cavities, thereby achieving bending of the end suction structure 9 in different positions and adjusting the suction direction.

[0054] Alternatively, the pneumatic driving method of the present invention, in which the deformation of the fan-shaped airbag causes the elastic deformation structure to bend, can also be achieved by placing a miniature electromagnetic coil inside the fan-shaped air cavity and embedding a magnet on the side of the end suction structure 9 that contacts the fan-shaped air cavity. When the electromagnetic coil is energized, it generates magnetic force, which drives the magnet at the corresponding position to move away, causing the elastic deformation structure to bend. In this case, the four control buttons 4 can be set as push-button switches to energize the four electromagnetic coils.

[0055] Furthermore, a control handle 6 is provided on the side of the control module 2; the control handle 6 is provided with four control buttons 4, which are used to control the state of the four solenoid valves respectively. In this embodiment, the air path design of controlling multiple air chambers through an air pump and solenoid valves is within the scope of what those skilled in the art can achieve, and will not be described in detail in this invention.

[0056] Furthermore, such as Figure 7 As shown, the suction hole 12 is a drum-shaped hole that tapers in the middle and expands at both ends. In this embodiment, by designing the shape of the suction hole 12, the suction effect can be improved during negative pressure suctioning.

[0057] To address the limited effectiveness of existing equipment in clearing viscous sputum from the tracheal wall, this invention employs a positioning hoop 7 for position fixation, which provides stable support for the end suction structure 9. Simultaneously, it can be combined with the bending deformation of the elastic deformation structure to achieve "multi-angle suctioning" of the suction tube, thereby enabling accurate suctioning.

[0058] Specifically, such as Figure 3 , Figure 4 As shown, an annular groove is formed on the wall of the insertion tube 1, and a positioning ring 7 is fitted on the outside of the insertion tube 1 and embedded in the annular groove. One end of the positioning ring 7 is fixedly connected to the end face of the annular groove, and the other end floats and is connected to the pressing handle 5 through the pull wire 13. By operating the pressing handle 5, the positioning ring 7 can be deformed and expanded, thereby pressing against the side wall of the airway to fix the position of the suction tube.

[0059] Furthermore, such as Figure 8 As shown, the positioning clamp 7 includes an upper clamp 71, an elastic rib 72, and a lower clamp 74. The upper clamp 71 is fixedly connected to the body of the insertion tube 1, and the lower clamp 74 is fitted onto the insertion tube 1. The lower clamp 74 is fixedly connected to a pull wire 13, which passes through the insertion tube 1 and connects to an external pressing handle 5. During implementation, pressing the pressing handle 5 can displace the pull wire 13, causing the lower clamp 74 to slide along the insertion tube 1. This, in turn, causes the elastic rib 72 to elastically deform and bend, resulting in the positioning clamp 7 expanding into a "lantern shape," thus supporting the positioning of the suction catheter within the trachea.

[0060] Furthermore, considering the patient's potential symptoms such as wheezing and coughing, in order to achieve a better positioning effect; such as Figure 8 As shown, multiple sets of bone-shaped protrusions 73 are provided on both sides of the elastic rib 72; the bone-shaped protrusions 73 are strip-shaped and expand into spherical shapes at the ends, which can be inserted into the folds between the cartilage rings inside the trachea to achieve reliable positioning; specifically, the multiple sets of bone-shaped protrusions 73 are arranged side by side on the outside of the elastic rib 72 so that the elastic rib 72 is fishbone shaped.

[0061] Furthermore, to facilitate rapid withdrawal of the suction catheter and avoid damage to the airway or nasal mucosa, reliable repositioning of the positioning ring 7 is necessary. In this invention, the elastic rib 72 of the positioning ring 7 is a combination structure consisting of a built-in metal spring (the size and elastic modulus are set as needed) and an outer layer of medical-grade silicone. Preferably, the bony protrusion 73 is entirely made of medical-grade silicone.

[0062] Preferably, a lever mechanism is provided inside the control module 2. One end of the lever mechanism is connected to the pressing handle 5, and the other end is connected to the pull wire 13. By operating the pressing handle 5, the pull wire 13 can be moved, thereby pulling the positioning hoop 7 to deform.

[0063] Alternatively, a wire winding mechanism can be used to wind and unwind the wire 13, thereby driving the deformation of the positioning ring 7. This only requires integrating the winding mechanism inside the control module 2 and replacing the pressing handle 5 with a crank handle. In this embodiment, the way the wire winding mechanism or lever mechanism is set inside the control module 2 and its specific connection with the pressing handle 5 is within the scope of what those skilled in the art can achieve, and will not be described in detail here.

[0064] Furthermore, in order to achieve long-term positioning of the suction tube, a buckle or elastic limiting ring can be installed on the outside of the pressing handle 5 and the control handle 6 to achieve the long-term limiting function of the positioning hoop 7.

[0065] In practice, the nasal visualization suction insertion system of the present invention can observe the status of the insertion path through a miniature camera 10. At the junction of the larynx and trachea, the elastic deformation structure can be driven to deform and adjust the orientation of the end as needed to facilitate successful insertion of the trachea. After insertion, the positioning ring 7 can be compressed by pressing the handle 5 and pulling the rope 13, causing the surrounding multiple elastic ribs 72 to expand in a lantern shape and press against the inner wall of the trachea, thereby positioning the suction tube and enabling continuous suctioning. During continuous suctioning, the presence of the positioning ring 7 can keep the suction hole 12 on the side of the end suction structure 9 in a "suspended" state, allowing for continuous suctioning of the trachea. During the process, the elastic bending section can be bent by air pressure as needed to ensure that the end suction structure 9 can be accurately aligned with the sputum accumulation area, reducing sputum residue caused by improper angle and relieving the patient's breathing difficulties.

[0066] Compared with the prior art, the technical solution provided in this embodiment has at least one of the following beneficial effects:

[0067] 1. The nasal visualization suction insertion system of the present invention has a miniature camera at the end and a display screen on the external control module to display the intubation process and the status of the suction tube inside the airway. It can dynamically observe the intubation position and adjust the intubation direction in time at the connection between the nasal cavity, larynx and trachea, reduce intubation deviation, avoid repeated intubation, ensure operation accuracy, reduce operation difficulty and improve the success rate of suction tube placement.

[0068] 2. Existing equipment requires reintubation if the suction catheter becomes dislodged or shifts position due to improper fixation. Repeated intubation increases the probability of airway mucosal scraping and bleeding. The nasal visual suction insertion system of this invention "anchors" the suction catheter in a preset position using a positioning clamp 7. Even if the patient has slight limb movement or coughing symptoms, it can reduce the shaking and displacement of the suction catheter, ensuring that the insertion depth meets clinical standards.

[0069] 3. Existing equipment, without a positioning structure, still cannot control the orientation of the suction tube due to its own bending and twisting, even when simply adjusting the end orientation. This invention uses a positioning ring 7 to position the tube against the tracheal wall. With the synergistic effect of the positioning ring 7 and the elastic deformation structure, medical staff do not need to worry about the suction tube shifting or twisting. They can more accurately control the bending direction and amplitude of the suction tube in the airway. The suction port 12 can also accurately contact the viscous sputum on the tracheal wall, and combined with negative pressure, loosen and suction it out, reducing the retention of viscous sputum in the airway.

[0070] 4. The nasal visual suction insertion system of the present invention can be adapted to special patient groups. For patients who are bedridden for a long time, have impaired consciousness, or require continuous suctioning after tracheotomy, existing equipment requires frequent manual adjustment of the position, which can easily increase patient discomfort. Through the expansion of the elastic clamp, the suction tube can be fixed to the inner wall of the trachea, achieving stable fixation of the suction tube inside the trachea for a long time, reducing the interference to the patient caused by repeated adjustments, and improving patient comfort. At the same time, it can effectively prevent the suction tube from accidentally dislodging in agitated patients, avoiding the risk of airway obstruction caused by tube dislodgement.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A transnasally visualized sputum suction placement system, characterized by, The application relates to a sputum suction device, which comprises a catheter (1), a control module (2), an elastic deformation structure, a terminal sputum suction structure (9) and a miniature camera (10). The terminal sputum suction structure (9) is internally provided with a sputum suction cavity (18), a plurality of sputum suction holes (12) in communication with the sputum suction cavity (18) are circumferentially arranged, the miniature camera (10) is embeddedly arranged at the end of the terminal sputum suction structure (9), the terminal sputum suction structure (9) is communicated with one end of the catheter (1) through the elastic deformation structure, and the control module (2) is arranged at the other end of the catheter (1); the control module (2) is used for controlling the elastic deformation structure to be bent and deformed, so that the terminal sputum suction structure (9) can be controlled to be adjusted in orientation; a sputum suction pipe interface (11) capable of being connected with an external negative pressure suction device is arranged on the side of the catheter (1). The elastic deformation structure comprises a sputum suction pipe (19), a gas cavity diaphragm (15) and an elastic cover (8); the elastic cover (8) is arranged outside the sputum suction pipe (19), and the two ends of the elastic cover (8) are respectively connected with the catheter (1) and the terminal sputum suction structure (9); an annular gas cavity is formed between the elastic cover (8) and the sputum suction pipe (19); four gas cavity diaphragms (15) are circumferentially arranged outside the sputum suction pipe (19), and the outside of the gas cavity diaphragm (15) is connected with the elastic cover (8), so that the annular gas cavity is divided into four fan-shaped gas cavities; four inflation holes (14) are arranged at the end of the catheter (1), the inflation holes (14) are respectively communicated with the four fan-shaped gas cavities, and the fan-shaped gas cavities are inflated, so that the fan-shaped gas cavities are bent and deformed; a snakelike deformation piece (20) is arranged inside the fan-shaped gas cavity; the snakelike deformation piece (20) is used for realizing the rebound of the elastic deformation structure and limiting the maximum deformation amount of the elastic deformation structure.

2. The nasally visualized sputum suction placement system of claim 1, wherein, The application further comprises a display screen (3), the control module (2) is provided with the display screen (3), and the display screen (3) is used for displaying the image shot by the miniature camera (10). A hose section (16) is arranged in the middle of the sputum suction pipe (19), the sputum suction pipe (19) is bent and deformed at the hose section (16) when the fan-shaped gas cavity is inflated and deformed, and the outer surface of the elastic cover (8) is provided with an annular wrinkle structure, which can realize the elongation or contraction of the elastic cover (8).

3. The nasally visualized sputum suction placement system according to claim 1 or 2, characterized in that, Four elastic ribs (17) extending along the axis direction of the elastic cover (8) are arranged on the elastic cover (8), and the elastic ribs (17) and the gas cavity diaphragm (15) are fixed through adhesion or are integrally formed.

4. The nasally visualized sputum plug placement system of claim 3, wherein, The control module (2) comprises a control circuit board, a miniature air pump and four electromagnetic valves; the miniature air pump is communicated with the four electromagnetic valves; four air channels and / or inflation pipes are arranged inside the catheter (1), the electromagnetic valves are communicated with the inflation holes (14) through the air channels and / or the inflation pipes; the control circuit board realizes independent inflation and deflation of the four fan-shaped gas cavities by controlling the position switching of the four electromagnetic valves.

5. The nasally visualized sputum plug placement system of claim 3, wherein, ​ 6. The nasally visualized sputum plug placement system of claim 5, wherein, The control module (2) is provided with a handle (6) on the side; the handle (6) is provided with four control buttons (4) for controlling the states of the four electromagnetic valves respectively.

7. The nasally visualized sputum suction placement system of claim 1, wherein, The sputum suction hole (12) is a drum-shaped hole with a waist-shaped structure, i.e. the middle part is tapered, and the two ends are gradually expanded.

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