A visual bronchoscope negative pressure foreign body suction device

Abstract

The present invention belongs to the field of medical device technology, and specifically relates to a visual bronchoscope negative pressure foreign body suction device, which includes a handle assembly, a mirror tube is fixed at one end of the handle assembly, an objective lens and a light guide element are fixed at the end of the mirror tube away from the handle assembly, a forceps insertion channel is opened inside the mirror tube, and further includes: a protective mechanism, the protective mechanism includes an airway tube and a protective bag, the airway tube is slidably connected to the inside of the forceps insertion channel, and the protective bag is assembled at the end of the airway tube away from the handle assembly. After the grasping forceps mechanism fixes the foreign body, the inflated protective bag wraps the foreign body inside the bronchus by inputting gas medium into the airway, so that the device can provide protection for the trachea during the process of removing the foreign body. At the same time, when removing the foreign body, the device has both clamping and negative pressure adsorption methods, thereby improving the scope of application of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a visual bronchoscope negative pressure foreign body suction device. Background Art

[0002] Foreign body aspiration in the bronchus is a common medical emergency, especially in children. Foreign body aspiration may cause airway obstruction, dyspnea, or even suffocation, so timely and effective removal of foreign bodies in the bronchus is crucial to treating patients. Traditional methods of removing foreign bodies in the bronchus include the use of forceps, tweezers, or suction devices, but these methods often have limitations, such as difficulty in operation, high risk of damage to the tracheal mucosa, and inability to accurately control the movement and positioning of foreign bodies.

[0003] In recent years, with the development of medical technology, visual bronchoscope has become an important tool for diagnosing and treating bronchial foreign bodies. Visual bronchoscope can enter the airway under direct vision, helping doctors locate foreign bodies and remove them. However, the existing visual bronchoscope still has the following problems during use:

[0004] 1. Most existing visualization bronchoscopes remove foreign bodies in the bronchi by clamping or negative pressure adsorption. The clamping method is suitable for irregular foreign bodies, and the negative pressure adsorption method is suitable for foreign bodies with regular shapes. Different removal devices need to be installed on the visualization bronchoscope for different foreign bodies. The replacement process is cumbersome and the scope of application is small.

[0005] 2. Existing visual bronchoscopes cannot provide protection for the inner wall of the bronchus during the removal of foreign bodies, which increases the risk of the edges and corners of foreign bodies scratching the trachea during the removal process;

[0006] Based on the above problems, the present invention proposes a visualized bronchoscope negative pressure foreign body suction device to improve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a visual bronchoscope negative pressure foreign body suction device. After the grasping forceps mechanism fixes the foreign body, a gas medium is introduced into the trachea, and the foreign body inside the bronchus is wrapped by an inflated protective bag, so that the device can provide protection for the trachea during the process of removing the foreign body. At the same time, when removing the foreign body, the device has both clamping and negative pressure adsorption removal methods, which improves the scope of application of the device.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A visual bronchoscope negative pressure foreign body suction device comprises a handle assembly, one end of the handle assembly is fixed with a mirror tube, an end of the mirror tube away from the handle assembly is fixed with an objective lens and a light guide element, a forceps insertion channel is provided inside the mirror tube, and further comprises:

[0010] A protection mechanism, the protection mechanism comprising an airway tube and a protection bag, the airway tube being slidably connected to the inside of the forceps channel, and the protection bag being assembled at one end of the airway tube away from the handle assembly;

[0011] A grasping forceps mechanism, the grasping forceps mechanism is assembled inside the forceps insertion channel and is located inside the airway tube, and the grasping forceps mechanism and the protective bag as well as the grasping forceps mechanism and the handle assembly are all connected to each other;

[0012] Wherein, after the gas medium is input into the airway tube, the protective bag expands and gradually expands to the outside of the forceps channel.

[0013] In a preferred embodiment, the material of the protective bag is any one of the following materials: PI, PET, PEEK, PTFE.

[0014] In a preferred embodiment, the material thickness of the protective capsule ranges from 1 to 50 μm.

[0015] In a preferred embodiment, the grasping forceps mechanism includes an inner catheter, an outer catheter, a ring and a plurality of jaws, the inner catheter is coaxially arranged inside the airway, the outer catheter is coaxially arranged outside the inner catheter, the inner catheter and the outer catheter are slidably connected, and the outer catheter and the protective bag are fixedly connected, the ring is fixed to one end of the outer side of the inner catheter close to the objective lens, the plurality of jaws are all assembled on the outside of the ring, a plurality of transmission parts are assembled between the outer catheter and the jaws, and the transmission parts are connected to the ring.

[0016] In a preferred embodiment, a plurality of mutually matching teeth are provided at one end of the plurality of jaws that are close to each other.

[0017] In a preferred embodiment, a plurality of support rings are evenly fixed inside the air guide tube, a plurality of air flow holes are evenly opened inside the support rings, and the support rings are slidably connected to the inner conduit.

[0018] In a preferred embodiment, the outer wall and the inner wall of the outer conduit are both provided with anti-rotation bosses, the inner wall of the support ring and the outer wall of the inner conduit are both provided with anti-rotation grooves, and the anti-rotation bosses and the anti-rotation grooves are matched.

[0019] In a preferred embodiment, the transmission part includes a first transmission rod, a second transmission rod, a third transmission rod, a fourth transmission rod and a pin shaft, the first transmission rod and the second transmission rod are both rotatably connected to the outside of the outer catheter, the third transmission rod is rotatably connected to one end of the first transmission rod, the fourth transmission rod is rotatably connected to one end of the second transmission rod, the pin shaft is fixed to the outside of the ring, the third transmission rod and the ring, the fourth transmission rod and the ring, and the third transmission rod and the fourth transmission rod are all rotatably connected via the pin shaft, and the third transmission rod and the jaw, as well as the fourth transmission rod and the jaw, correspond one to one.

[0020] The technical effects achieved by the present invention are:

[0021] After the grasping forceps mechanism fixes the foreign body, the present invention inputs a gas medium into the trachea to expand the protective bag and gradually expand out of the insertion forceps channel, and the expanded protective bag wraps the foreign body in the bronchus to prevent the foreign body from scratching the trachea during the process of removing the foreign body, so that the device can provide protection for the trachea during the process of removing the foreign body;

[0022] When the shape of the foreign object is irregular, the present invention can drive multiple jaws to remove the irregular foreign object by clamping through the control module. When the shape of the foreign object is regular, the air valve assembly can form a negative pressure space inside the inner catheter and the jaws, so that the multiple jaws can remove the regular foreign object by negative pressure adsorption. When the device removes the foreign object, it has both clamping and negative pressure adsorption removal methods, thereby improving the scope of application of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the local structure of the mirror tube of the present invention;

[0025] Figure 3 It is a partial structural cross-sectional view of the mirror tube of the present invention;

[0026] Figure 4 It is an enlarged view of the local structure of the mirror tube of the present invention;

[0027] Figure 5 It is a structural exploded diagram of the grasping forceps mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the anti-rotation boss and the anti-rotation groove of the present invention;

[0029] Figure 7 It is a structural explosion diagram of the transmission part of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 10. Handle assembly; 11. Eyepiece; 12. Medium valve; 13. Channel entrance; 14. Multi-function knob; 15. Light cone; 20. Mirror tube; 21. Objective lens; 22. Light guide element; 23. Forceps channel; 30. Protection mechanism; 31. Airway tube; 32. Protection bag; 40. Grasping mechanism; 41. Inner catheter; 42. Outer catheter; 43. Ring; 44. Jaw; 45. Support ring; 46. Anti-rotation boss; 47. Anti-rotation groove; 50. Transmission part; 51. First transmission rod; 52. Second transmission rod; 53. Third transmission rod; 54. Fourth transmission rod; 55. Pin shaft. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0036] Please see attached Figures 1 to 5 As shown, it is the first embodiment of the present invention, which provides a visual bronchoscope negative pressure foreign body suction device, including a handle assembly 10, on which an eyepiece 11, a plurality of medium valves 12, a channel entrance 13, a multifunctional knob 14 and a light cone 15 are arranged, a mirror tube 20 is fixed at one end of the handle assembly 10, an objective lens 21 and a light guide element 22 are fixed at one end of the mirror tube 20 away from the handle assembly 10, a clamp insertion channel 23 is opened inside the mirror tube 20, and the channel entrance 13 and the clamp insertion channel 23 are interconnected, and further comprising:

[0037] The protection mechanism 30 is detachably mounted inside the forceps channel 23. The protection mechanism 30 includes an airway tube 31 and a protection bag 32. The airway tube 31 is slidably connected to the inside of the forceps channel 23. The protection bag 32 is mounted inside the airway tube 31 at one end away from the handle assembly 10.

[0038] The grasping forceps mechanism 40 is assembled inside the forceps insertion channel 23 and is located inside the airway tube 31, and the grasping forceps mechanism 40 and the protective bag 32 as well as the grasping forceps mechanism 40 and the handle assembly 10 are interconnected, and the grasping forceps mechanism 40 can fix the foreign body in the bronchus;

[0039] When the gas medium is input into the trachea 31 , the protective bag 32 expands and gradually expands to the outside of the forceps channel 23 .

[0040] Here, a control module (not shown in the figure) is also used in conjunction with the device, and a plurality of control units and a plurality of air valve assemblies are arranged in the control module. There is a one-to-one correspondence between the control unit and the airway tube 31, the control unit and the grasping forceps mechanism 40, the air valve assembly and the airway tube 31, and the air valve assembly and the grasping forceps mechanism 40. The plurality of control units can respectively drive the airway tube 31 and the grasping forceps mechanism 40 to move inside the forceps insertion channel 23, and the plurality of air valve assemblies can respectively input or extract gas into or from the airway tube 31 and the grasping forceps mechanism 40. In order to better describe the working process of the present device, the control unit and the air valve assembly corresponding to the airway tube 31 are recorded as the first control unit and the first air valve assembly, and the control unit and the air valve assembly corresponding to the grasping forceps mechanism 40 are recorded as the second control unit and the second air valve assembly. Specifically, the structural form of the control module can refer to the structural form of the biopsy forceps control end in the prior art. As long as the purpose of adjusting the position of the airway tube 31 and the grasping forceps mechanism 40 can be achieved, its structural form is not specifically limited here.

[0041] In this embodiment, when it is necessary to remove a foreign body inside the bronchus, lighting is provided by the optical element 22, an image of the inside of the bronchus is collected by the objective lens 21, the mirror tube 20 is inserted into the bronchus where the foreign body exists, the grasping forceps mechanism 40 is moved by the control module, the foreign body is fixed by the grasping forceps mechanism 40, a gas medium is injected into the trachea 31 through the first air valve assembly, so that the protective bag 32 expands and gradually expands to the outside of the insertion forceps channel 23, the surface of the foreign body is wrapped by the expanded protective bag 32, the trachea 31 and the grasping forceps mechanism 40 are pulled outward synchronously, and the foreign body is removed by the grasping forceps mechanism 40. During the foreign body removal process, the trachea is protected by the protective bag 32 wrapped around the outside of the foreign body to prevent the foreign body from scratching the trachea.

[0042] In a specific embodiment, the expansion process of the protective bag 32 can refer to the expansion process of a balloon. During the expansion process of the protective bag 32, its material will be stretched, the wall thickness will become thinner, and the gas medium will be input into the trachea 31, so that the protective bag 32 can wrap the foreign body. In this embodiment, the protective bag 32 has better extension performance, and the inflated protective bag 32 can be used for foreign bodies of larger sizes.

[0043] In another specific embodiment, the expansion process of the protective bag 32 can refer to the expansion process of a kayak. During the expansion of the protective bag 32, its material will not be stretched, and the wall thickness will not become thinner. The gas medium is input into the trachea 31 so that the protective bag 32 can wrap the foreign matter. In this embodiment, the protective bag 32 has better protective performance and puncture resistance, which can avoid or reduce the phenomenon of foreign matter piercing the protective bag 32.

[0044] In a preferred embodiment, the material of the protective bag 32 is any one of the following materials: PI, PET, PEEK, PTFE or other medical polymer materials, and the material thickness of the protective bag 32 ranges from 1 to 50 μm. Specifically, in this embodiment, the material of the clamp channel 23 is preferably PEEK, and the material thickness of the clamp channel 23 is preferably 30 μm.

[0045] In this embodiment, the medical polymer material generally has good biocompatibility, and can have good compatibility with human tissues and organisms, and can further combine with human tissues without causing side effects such as rejection, allergies, corrosion and carcinogenesis.

[0046] Next, please refer to Figures 3 to 5 As shown, the grasping forceps mechanism 40 includes an inner catheter 41, an outer catheter 42, a collar 43 and two jaws 44. The inner catheter 41 is coaxially arranged inside the airway 31, and the outer catheter 42 is coaxially arranged outside the inner catheter 41. The inner catheter 41 and the outer catheter 42 are slidably connected, and the outer catheter 42 and the protective bag 32 are fixedly connected. The collar 43 is fixed to one end of the outer side of the inner catheter 41 close to the objective lens 21. The two jaws 44 are both assembled on the outer side of the collar 43. Two transmission parts 50 are arranged between the outer catheter 42 and the jaws 44. The two transmission parts 50 are respectively assembled on the upper end and the lower end of the outer side of the collar 43, and the transmission part 50 is connected to the collar 43. When the inner catheter 41 moves relative to the outer catheter 42, the inner catheter 41 drives the transmission part 50 to operate and drives the jaws 44 to operate.

[0047] Here, the second regulating unit and the inner conduit 41 are connected as well as the second regulating unit and the outer conduit 42 , and the second regulating unit can drive the inner conduit 41 and the outer conduit 42 to move respectively, and the second air valve assembly and the inner conduit 41 are connected.

[0048] It should be noted that the cross-sectional shape of the protective bag 32 is similar to a U-shape, and the two ends of the protective bag 32 are connected to the airway tube 31 and the outer catheter 42 respectively.

[0049] In this embodiment, when removing a foreign body inside the bronchus, if the shape of the foreign body is irregular, it is necessary to remove the foreign body by clamping, and the second regulating unit drives the inner catheter 41 and the outer catheter 42 to move synchronously inside the forceps channel 23, so that the jaws 44 and the foreign body fit together, and the second regulating unit drives the outer catheter 42 to move in a direction close to the foreign body, so that the outer catheter 42 and the inner catheter 41 move relative to each other, and the transmission part 50 is driven by the outer catheter 42 to operate, and the transmission part 50 drives the multiple jaws 44 to rotate, so that the multiple jaws 44 rotate in a direction away from each other, and after rotating to a suitable position, the inner catheter 41, the outer catheter 42 and the jaws 44 are driven by the second regulating unit to move synchronously until the foreign body is located between the two jaws 44, and the outer catheter 42 is driven by the second regulating unit to move in a direction away from the foreign body, so that the outer catheter 42 and the inner catheter 41 move relative to each other, and the transmission part 50 is driven by the outer catheter 42 to operate in the reverse direction, and the transmission part 50 drives the multiple jaws The jaws 44 rotate in the opposite direction, and the foreign body is clamped by the cooperation of multiple jaws 44, and then the inner catheter 41, the outer catheter 42 and the jaws 44 are driven by the second control unit to move synchronously outside the patient's body, thereby removing the irregularly shaped foreign body in the bronchus; if the shape of the foreign body is relatively regular and multiple jaws 44 cannot clamp the regular foreign body, the inner catheter 41, the outer catheter 42 and the jaws 44 are driven by the second control unit to move synchronously until the jaws 44 and the regular foreign body are fitted together, and the gas inside the inner catheter 41 is extracted by the second air valve assembly, so that a negative pressure space is formed inside the inner catheter 41 and the jaws 44, and the regular foreign body is fixed by negative pressure adsorption, and the inner catheter 41, the outer catheter 42 and the jaws 44 are driven by the second control unit to move synchronously outside the patient's body, thereby removing the regular shaped foreign body in the bronchus, so that the device can remove foreign bodies of different shapes by clamping or negative pressure adsorption, thereby improving the scope of application of the device and avoiding the step of replacing the removal device according to the shape of the foreign body.

[0050] Please refer again Figures 4 to 5 A plurality of mutually matching teeth are provided at one end of the multiple jaws 44 close to each other and at the end far away from the ring 43, and a sealing element is provided at one end of the multiple jaws 44 close to each other. When the multiple jaws 44 are in contact with each other, the contact parts of the multiple jaws 44 are tightly in contact.

[0051] In this embodiment, when irregular foreign objects are removed by clamping, the setting of the teeth enables the multiple jaws 44 to clamp and fix the irregular foreign objects more conveniently. When regular foreign objects are removed by negative pressure adsorption, the setting of the sealing element can prevent the gas outside the inner conduit 41 and the jaws 44 from entering the inner conduit 41 through the joints of the multiple jaws 44, thereby preventing the negative pressure space formed by the inner conduit 41 and the jaws 44 from being unable to adsorb regular foreign objects due to poor sealing performance.

[0052] Please refer again Figures 3 to 5 A plurality of support rings 45 are evenly fixed inside the air guide tube 31 , a plurality of air flow holes are evenly opened inside the support rings 45 , and the support rings 45 are slidably connected to the inner conduit 41 .

[0053] In this embodiment, the support ring 45 is provided so that the air duct 31, the inner conduit 41 and the outer conduit 42 can maintain a coaxial state, and the air flow holes are provided so that the gas medium input into the air duct 31 through the first air valve assembly can flow to the protective bag 32, so that the protective bag 32 expands and wraps the foreign matter.

[0054] Please refer again Figure 5 and Figure 6 As shown, the outer wall and the inner wall of the outer conduit 42 are both provided with anti-rotation bosses 46, and the inner wall of the support ring 45 and the outer wall of the inner conduit 41 are both provided with anti-rotation grooves 47, and the anti-rotation bosses 46 and the anti-rotation grooves 47 are matched.

[0055] In this embodiment, when the inner catheter 41 and the outer catheter 42 move relative to each other or the outer catheter 42 and the airway tube 31 move relative to each other, the cooperation of the anti-rotation boss 46 and the anti-rotation groove 47 can prevent the inner catheter 41 and the outer catheter 42 from rotating during the movement, so that the device can operate stably.

[0056] Please refer again Figure 7 As shown, the transmission part 50 includes a first transmission rod 51, a second transmission rod 52, a third transmission rod 53, a fourth transmission rod 54 and a pin 55. The first transmission rod 51 and the second transmission rod 52 are both rotatably connected to the outside of the outer catheter 42, the third transmission rod 53 is rotatably connected to one end of the first transmission rod 51, and the fourth transmission rod 54 is rotatably connected to one end of the second transmission rod 52. The pin 55 is fixed to the outside of the ring 43. The third transmission rod 53 and the ring 43, the fourth transmission rod 54 and the ring 43, and the third transmission rod 53 and the fourth transmission rod 54 are all rotatably connected through the pin 55, and the third transmission rod 53 and the jaw 44, as well as the fourth transmission rod 54 and the jaw 44 correspond one to one.

[0057] In this embodiment, when an irregular foreign body is taken out by clamping, the second regulating unit drives the inner catheter 41, the outer catheter 42 and the jaws 44 to move synchronously in the direction close to the foreign body. When the jaws 44 and the foreign body are in contact, the second regulating unit drives the outer catheter 42 to move in the direction close to the foreign body, so that the outer catheter 42 moves relative to the inner catheter 41, and the outer catheter 42 drives the first transmission rod 51 and the second transmission rod 52 to rotate away from each other. Through the cooperation of the first transmission rod 51 and the second transmission rod 52, the third transmission rod 53 and the fourth transmission rod 54 are driven to surround The outer guide tube 42 is driven by the second regulating unit to move in the opposite direction, so that the outer guide tube 42 moves relative to the inner guide tube 41. The outer guide tube 42 drives the first transmission rod 51 and the second transmission rod 52 to rotate in the direction of approaching each other, thereby driving the multiple jaws 44 to rotate in the direction of approaching each other, and the irregular foreign objects are clamped by the cooperation of the multiple jaws 44.

[0058] The working principle of the present invention is:

[0059] When it is necessary to remove a foreign body inside the bronchus, lighting is provided by the optical element 22, images of the inside of the bronchus are collected by the objective lens 21, the mirror tube 20 is inserted into the bronchus where the foreign body is present, and the inner catheter 41, the outer catheter 42 and the jaws 44 are driven by the second control unit to move in a direction close to the foreign body. According to the shape of the foreign body, the foreign body is fixed by clamping or negative pressure adsorption through the cooperation of the inner catheter 41, the outer catheter 42 and the jaws 44, and a gas medium is input into the trachea 31 to expand the protective bag 32 and gradually expand to the outside of the forceps channel 23. The foreign body is wrapped by the protective bag 32, and the trachea 31 and the grasping forceps mechanism 40 are pulled outward synchronously to remove the foreign body by the grasping forceps mechanism 40. During the removal of the foreign body, the trachea is protected by the protective bag 32 wrapped around the outside of the foreign body to prevent the foreign body from scratching the trachea.

[0060] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A visual bronchoscope negative pressure foreign body suction device, characterized in that: The invention comprises a handle assembly (10), a mirror tube (20) being fixed at one end of the handle assembly (10), an objective lens (21) and a light guide element (22) being fixed inside the mirror tube (20) at one end away from the handle assembly (10), a clamp insertion channel (23) being provided inside the mirror tube (20), and further comprising: a protection mechanism (30), the protection mechanism (30) comprising an airway tube (31) and a protection bag (32), the airway tube (31) being slidably connected to the interior of the forceps channel (23), and the protection bag (32) being mounted on an end of the airway tube (31) away from the handle assembly (10); A grasping forceps mechanism (40), the grasping forceps mechanism (40) being assembled inside the forceps insertion channel (23) and being located inside the airway tube (31), the grasping forceps mechanism (40) and the protective bag (32) as well as the grasping forceps mechanism (40) and the handle assembly (10) being connected to each other, the grasping forceps mechanism (40) comprising an inner catheter (41), an outer catheter (42), a collar (43) and a plurality of jaws (44), the inner catheter (41) being coaxially arranged inside the airway tube (31), the outer catheter (42) ) is coaxially arranged on the outside of the inner catheter (41), the inner catheter (41) and the outer catheter (42) are slidably connected, and the outer catheter (42) and the protective bag (32) are fixedly connected, the collar (43) is fixed to one end of the outer side of the inner catheter (41) close to the objective lens (21), the plurality of jaws (44) are all assembled on the outside of the collar (43), a plurality of transmission parts (50) are assembled between the outer catheter (42) and the jaws (44), and the transmission parts (50) and the collar (43) are connected; Wherein, after the gas medium is input into the airway tube (31), the protective bag (32) expands and gradually expands to the outside of the forceps insertion channel (23).

2. A visual bronchoscope negative pressure foreign body suction device according to claim 1, characterized in that: The material of the protective bag (32) is any one of the following materials: PI, PET, PEEK, PTFE.

3. A visual bronchoscope negative pressure foreign body suction device according to claim 1, characterized in that: The material thickness of the protective capsule (32) ranges from 1 to 50 μm.

4. A visual bronchoscope negative pressure foreign body suction device according to claim 1, characterized in that: A plurality of teeth that fit together are formed at one end of the plurality of jaws (44) that are close to each other.

5. The visual bronchoscope negative pressure foreign body suction device according to claim 1, characterized in that: A plurality of support rings (45) are evenly fixed inside the air guide tube (31), a plurality of air flow holes are evenly opened inside the support ring (45), and the support ring (45) is slidably connected to the inner conduit (41).

6. A visual bronchoscope negative pressure foreign body suction device according to claim 5, characterized in that: The outer wall and the inner wall of the outer conduit (42) are both provided with anti-rotation bosses (46), the inner wall of the support ring (45) and the outer wall of the inner conduit (41) are both provided with anti-rotation grooves (47), and the anti-rotation bosses (46) and the anti-rotation grooves (47) are matched.

7. The visual bronchoscope negative pressure foreign body suction device according to claim 1, characterized in that: The transmission part (50) comprises a first transmission rod (51), a second transmission rod (52), a third transmission rod (53), a fourth transmission rod (54) and a pin (55); the first transmission rod (51) and the second transmission rod (52) are both rotatably connected to the outside of the outer catheter (42); the third transmission rod (53) is rotatably connected to one end of the first transmission rod (51); the fourth transmission rod (54) is rotatably connected to one end of the second transmission rod (52); the pin (55) is fixed to the outside of the collar (43); the third transmission rod (53) and the collar (43), the fourth transmission rod (54) and the collar (43), and the third transmission rod (53) and the fourth transmission rod (54) are all rotatably connected via the pin (55); and the third transmission rod (53) and the jaw (44), as well as the fourth transmission rod (54) and the jaw (44) are all in one-to-one correspondence.

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