Locking structure and cannula for blocking airway for hard bronchoscope

Abstract

The utility model relates to the technical field of medical instruments, and discloses a locking structure and an airway blocking sleeve for a hard bronchoscope, which comprise a fixing unit. The fixing unit comprises a fixing assembly, a pressing assembly arranged in the fixing assembly, an adjusting assembly rotationally arranged on one side of the fixing assembly and a limiting assembly arranged in the adjusting assembly, the fixing assembly is rotationally matched with the adjusting assembly, and the adjusting assembly is in sliding fit with the limiting assembly. The hard bronchoscope sleeve fixing device has the advantages that through control over the adjusting assembly and cooperation with the fixing assembly, the pressing assembly and the limiting assembly, a sleeve can be clamped and fixed, the stability of a hard bronchoscope and the sleeve is guaranteed, and the sleeve and the hard bronchoscope can be rapidly disassembled; through the arrangement of the sleeve, the hard bronchoscope can be used in cooperation with the hard bronchoscope, the hard bronchoscope can be connected with a breathing machine through the breathing machine connector when independently used, repeated stimulation to a patient is prevented, and trauma to the patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a locking structure and a sleeve for blocking airway for a hard bronchoscope. Background Art

[0002] With the rise of video rigid bronchoscopes, the images are clearer and easier to store. In addition to keeping the airway open, rigid bronchoscopes also have side holes at the operating end that can be connected to a ventilator, and have many interventional channels to facilitate soft bronchoscopes and other instruments to enter the airway for operation, greatly expanding its application range. Its main indications are lesions in the large airways or on the walls, foreign bodies in the airways, and airway stenosis.

[0003] Patients who undergo rigid bronchoscopy and treatment usually receive general anesthesia first because the operation is extremely irritating. When the patient enters the surgical anesthesia period, a rigid bronchoscope is inserted and connected to the anesthesia machine through the side hole for high-frequency jet ventilation. Because the gas entering the lungs will escape through the glottis, inhalation anesthesia is difficult to maintain the ideal depth of anesthesia and will cause indoor gas pollution. Total intravenous anesthesia is usually chosen for anesthesia maintenance. After the operation, the rigid bronchoscope is removed, and the endotracheal tube or laryngeal mask is reinserted. The endotracheal tube or laryngeal mask is removed after the patient is fully awake.

[0004] Due to severe air leakage during rigid bronchoscopy, tidal volume and airway pressure are difficult to maintain. Patients undergoing long-term surgery may suffer from complications such as atelectasis and hypoxemia due to insufficient ventilation. In addition, anesthesiologists cannot perform lung protection measures such as inflation because it is difficult to maintain airway pressure. Long-term hypoxemia seriously affects the patient's prognosis, especially for patients with cardiovascular and cerebrovascular diseases. In addition, after the operation, the rigid bronchoscope needs to be removed and the endotracheal tube or laryngeal mask needs to be reinserted, which adds the stimulation of endotracheal intubation and increases patient trauma and medical costs. In the prior art, the following problems exist: 1. It is inconvenient to connect and disassemble the rigid bronchoscope and the cannula; 2. It adds the stimulation of endotracheal intubation to the patient during routine use. Utility Model Content

[0005] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] The utility model aims to provide a locking structure, which can solve the problem of inconvenient connection and disassembly between a hard bronchoscope and a sleeve.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a locking structure, which includes a fixing unit, the fixing unit includes a fixing component, a clamping component arranged in the fixing component, an adjusting component rotating on one side of the fixing component and a limiting component arranged in the adjusting component, the fixing component and the adjusting component are rotationally matched, and the adjusting component and the limiting component are slidingly matched.

[0008] As a preferred solution of the locking structure described in the utility model, the fixing assembly includes a fixing cylinder, a first ratchet fixedly sleeved on the outer ring of the fixing cylinder, and an outer cylinder arranged on one side of the fixing cylinder, the first ratchet divides the fixing cylinder into a first contact surface and a second contact surface, and the inner ring of the outer cylinder is fixedly connected with a positioning column.

[0009] As a preferred solution of the locking structure of the utility model, wherein: the two ends of the outer cylinder are respectively fixedly connected with a first fixing ring and a second fixing ring, the second fixing ring is provided with a first sliding groove on the side facing the inner side of the outer cylinder, one side of the first fixing ring is fixed to one end of the fixing cylinder, the first fixing ring is provided with a second sliding groove, and the second sliding groove corresponds to the first sliding groove.

[0010] As a preferred solution of the locking structure described in the utility model, the clamping assembly includes a pressing plate, a positioning hole passing through the pressing plate, and sliding rods respectively fixed on both sides of the pressing plate, one of the sliding rods slides in the first sliding groove, the other sliding rod passes through the second sliding groove, and the sliding rod and the second sliding groove are slidably matched.

[0011] As a preferred solution of the locking structure described in the utility model, the adjustment assembly includes an adjustment cylinder sleeved on the outer ring of the fixed cylinder, a third fixing ring and a fourth fixing ring respectively fixed to the ends of the adjustment cylinder, and a through groove symmetrically opened on the adjustment cylinder, the inner ring of the fourth fixing ring is rotationally matched with the second contact surface, and the inner ring of the third fixing ring is rotationally matched with the first contact surface.

[0012] As a preferred solution of the locking structure of the utility model, wherein: a guide column is fixedly connected between the third fixing ring and the fourth fixing ring, a third sliding groove is opened on the fourth fixing ring, and the third sliding groove is slidably matched with a sliding rod passing through the second sliding groove.

[0013] As a preferred solution of the locking structure described in the utility model, the limiting assembly includes a movable ring sliding on the inner ring of the adjusting cylinder, a second ratchet fixed to the inner ring of the movable ring, a pull plate symmetrically fixed to the outer ring of the movable ring, a guide hole opened on the movable ring and a spring arranged on one side of the movable ring.

[0014] As a preferred solution of the locking structure described in the utility model, wherein: the second ratchet is meshed with the first ratchet, the pull plate is slidably matched with the through groove, the guide column is adapted to the guide hole and the spring, and the guide column is slidably matched with the guide hole, and the two ends of the spring are respectively fixed on one side of the movable ring and the inner side of the third fixed ring.

[0015] The beneficial effects of the utility model are as follows: the utility model can clamp and fix the sleeve by controlling the adjustment component and cooperating with the fixing component, the clamping component and the limiting component to ensure the stability of the rigid bronchoscope and the sleeve, and can quickly disassemble the sleeve and the rigid bronchoscope by controlling the movement of the limiting component.

[0016] The utility model aims to provide a sleeve for blocking airway for a rigid bronchoscope, which can solve the problem of additional stimulation of tracheal intubation to patients during conventional use.

[0017] In order to solve the above technical problems, the utility model provides the following technical solutions: a cannula for sealing the airway for a rigid bronchoscope, which includes an operating unit, wherein the operating unit includes a rigid bronchoscope, a cannula movably sleeved on the outer ring of the rigid bronchoscope, a high-capacity low-pressure cuff arranged on the outer ring of the cannula, a guide air bag connected to the high-capacity low-pressure cuff through a catheter, and a ventilator connector movably installed on one end of the cannula, and the fixing unit is arranged on the outer ring of the rigid bronchoscope.

[0018] As a preferred solution of the airway blocking sleeve for the rigid bronchoscope of the utility model, the outer ring of the rigid bronchoscope is fixedly connected to the inner ring of the fixed tube, the distance between the rigid bronchoscope and the second fixed ring is slightly larger than the thickness of the sleeve, and the sleeve is adapted to the pressure plate.

[0019] The beneficial effects of the utility model are as follows: the utility model can be used in conjunction with a rigid bronchoscope through the setting of the sleeve, and can also be connected to a ventilator through a ventilator connector when used alone to serve as a tracheal tube, thereby preventing multiple stimulations to the patient and reducing trauma to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 It is a structural schematic diagram of the locking structure.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the fixed component.

[0023] Figure 3 It is a structural schematic diagram of the clamping component.

[0024] Figure 4 A schematic diagram of the structure of the adjustment component.

[0025] Figure 5 It is a schematic diagram of the structure of the limit component.

[0026] Figure 6 This is a schematic diagram of the structure of a cannula for sealing the airway used in a rigid bronchoscope.

[0027] Figure 7 This is an exploded view of the partial structure of the cannula used to block the airway for rigid bronchoscope. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, 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.

[0029] 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.

[0030] 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figure 1 , which is the first embodiment of the utility model, and this embodiment provides a locking structure, which includes a fixing unit 100, the fixing unit 100 includes a fixing component 101, a clamping component 102 arranged in the fixing component 101, an adjusting component 103 rotating on one side of the fixing component 101, and a limiting component 104 arranged in the adjusting component 103, the fixing component 101 and the adjusting component 103 are rotationally matched, and the adjusting component 103 and the limiting component 104 are slidingly matched.

[0033] When in use, the adjustment component 103 is rotated and the limiting component 103 and the pressing component 102 are moved through the cooperation of the limiting component 104 and the fixing component 101, so as to complete the connection between the rigid bronchoscope 201 and the sleeve 202. The limiting of the adjustment component 103 and the fixing component 101 can be released by controlling the limiting component 104, and the connection between the rigid bronchoscope 201 and the sleeve 202 can be released by rotating the adjustment component 103, so as to realize the disassembly of the two.

[0034] Example 2

[0035] Reference Figure 2 to Figure 5 , which is the second embodiment of the utility model, which is different from the first embodiment in that it also includes a fixing assembly 101 including a fixing cylinder 101a, a first ratchet 101b fixedly sleeved on the outer ring of the fixing cylinder 101a, and an outer cylinder 101d arranged on one side of the fixing cylinder 101a, the first ratchet 101b divides the fixing cylinder 101a into a first contact surface L and a second contact surface M, the inner ring of the outer cylinder 101d is fixedly connected with a positioning column 101h, the fixing unit 100 can be stably fixed on the hard bronchoscope 201 through the fixing cylinder 101a, and the setting of the outer cylinder 101d can provide a suitable space for the connection between the sleeve 202 and the hard bronchoscope 201.

[0036] Furthermore, at least two groups of positioning posts 101h are centrally symmetrically arranged in the inner circle of the outer cylinder 101d, and one group includes at least one positioning post 101h. The at least two groups of positioning posts 101h can ensure the clamping and fixation of the sleeve 202 and the connection between the sleeve 202 and the rigid bronchoscope 201. At least one positioning post 101h in a group is used to limit the movement of the pressure plate 102a, and also prevent the pressure plate 102a from flipping over, so as to avoid unstable connection between the rigid bronchoscope 201 and the sleeve 202.

[0037] Specifically, the two ends of the outer cylinder 101d are respectively fixedly connected with a first fixing ring 101c and a second fixing ring 101e, a first slide groove 101f is provided on the side of the second fixing ring 101e facing the inner side of the outer cylinder 101d, one side of the first fixing ring 101c is fixed to one end of the fixing cylinder 101a, and a second slide groove 101g is provided on the first fixing ring 101c, and the second slide groove 101g corresponds to the first slide groove 101f.

[0038] Furthermore, the number of the first slide groove 101f and the second slide groove 101g is the same as the number of the positioning posts 101h, which can ensure the normal operation of the clamping assembly 102 and also ensure the connection between the rigid bronchoscope 201 and the sleeve 202.

[0039] Specifically, the clamping assembly 102 includes a pressing plate 102a, a positioning hole 102b passing through the pressing plate 102a, and sliding rods 102c respectively fixed on both sides of the pressing plate 102a, wherein one sliding rod 102c slides in the first sliding groove 101f, and the other sliding rod 102c passes through the second sliding groove 101g, and the sliding rod 102c slides with the second sliding groove 101g.

[0040] Furthermore, the number of clamping components 102 is set to be the same as the number of the first slide groove 101f and the second slide groove 101g in order to ensure the normal operation of the clamping component 102. The number of positioning holes 102b on a pressure plate 102a is consistent with the number of fixed components 101 in a group to ensure the stability of the movement process of the pressure plate 102a. The sliding rod 102c at one end passes through the second slide groove 101g in order to be able to realize the movement of the clamping component 102 by controlling the adjustment component 103.

[0041] Specifically, the adjustment component 103 includes an adjustment cylinder 103a sleeved on the outer ring of the fixed cylinder 101a, a third fixing ring 103b and a fourth fixing ring 103c respectively fixed to the ends of the adjustment cylinder 103a, and a through groove 103f symmetrically opened on the adjustment cylinder 103a, the inner ring of the fourth fixing ring 103c is rotationally matched with the second contact surface M, and the inner ring of the third fixing ring 103b is rotationally matched with the first contact surface L. The third fixing ring 103b and the fourth fixing ring 103c are rotationally matched with the first contact surface L and the second contact surface M respectively, which can provide conditions for the rotation of the adjustment cylinder 103a. At the same time, the friction between the third fixing ring 103b, the fourth fixing ring 103c and the first contact surface L and the second contact surface M is relatively large, so a certain force is required for operation, which also prevents misoperation of the adjustment component 103.

[0042] Specifically, a guide column 103d is fixedly connected between the third fixed ring 103b and the fourth fixed ring 103c. A third slide groove 103e is provided on the fourth fixed ring 103c. The third slide groove 103e slides with the slide rod 102c that passes through the second slide groove 101g. The number of third slide grooves 103e is the same as that of the second slide groove 101g, and corresponds to the second slide groove 101g. The movement operation of the clamping assembly 102 is realized by the shape of the third slide groove 103e. The number of guide columns 103d is set to at least two, in order to match the spring 104d, to ensure that the moving ring 104a will not shift during the movement.

[0043] Specifically, the limiting assembly 104 includes a moving ring 104a sliding on the inner ring of the adjusting cylinder 103a, a second ratchet 104b fixed to the inner ring of the moving ring 104a, a pull plate 104e symmetrically fixed to the outer ring of the moving ring 104a, a guide hole 104c opened on the moving ring 104a, and a spring 104d arranged on one side of the moving ring 104a. Through the action of the limiting assembly 104, it is ensured that the adjusting cylinder 103a can only rotate in one direction, thereby realizing the limiting effect on the adjusting assembly 103.

[0044] Specifically, the second ratchet 104b is engaged with the first ratchet 101b, the pull plate 104e is slidably matched with the through groove 103f, the guide column 103d is adapted to the guide hole 104c and the spring 104d, and the guide column 103d is slidably matched with the guide hole 104c, and the two ends of the spring 104d are respectively fixed to one side of the movable ring 104a and the inner side of the third fixed ring 103b. Through the action of the spring 104d, a thrust can be generated on the movable ring 104a, so that the second ratchet 104b can be stably engaged with the first ratchet 101b.

[0045] When in use, when it is necessary to fix it, first remove the ventilator connector 205 at one end of the sleeve 202, and then put it on the outer ring of the hard bronchoscope 201. After the sleeve is completed, rotate the adjusting cylinder 103a. Since the pull plate 104e and the through groove 103f slide together, the rotation of the adjusting cylinder 103a will drive the moving ring 104a to rotate. While the adjusting cylinder 103a rotates, the third sliding groove 103e and the sliding rod 102c cooperate to drive the pressing plate 102a to move closer to the center of the outer cylinder 101d when the adjusting cylinder 103a drives the fourth fixing ring 103c to rotate. At this time, the pressing plate 102a is ensured to remain stable when it descends through the positioning hole 102b and the positioning column 101h. When the adjusting cylinder 103a cannot be rotated, it means that the pressing plate 102a has Fix the sleeve 202 on the outer ring of the rigid bronchoscope 201, and then the next operation can be carried out; when the sleeve 202 and the rigid bronchoscope 201 need to be disassembled, first pull the pull plate 104e, and the movement of the pull plate 104e will drive the movable ring 104a to move, so that the second ratchet 104b disengages from the first ratchet 101b, and then the adjustment cylinder 103a can be rotated in the opposite direction to drive the pressure plate 102a to move away from the center of the outer cylinder 101d. When it is rotated to the original position, release the pull plate 104e at this time, because the action of the spring 104d will drive the movable ring 104a to return to the original position, so that the second ratchet 104b re-engages with the first ratchet 101b, which will not affect the next operation, and then the sleeve 202 can be removed from the rigid bronchoscope 201.

[0046] Example 3

[0047] Reference Figure 6-7 , which is the third embodiment of the utility model, and is based on the first two embodiments. This embodiment provides a cannula for blocking the airway for a rigid bronchoscope, which includes an operating unit 200, and the operating unit 200 includes a rigid bronchoscope 201, a cannula 202 movably sleeved on the outer ring of the rigid bronchoscope 201, a high-capacity low-pressure cuff 203 arranged on the outer ring of the cannula 202, a guide airbag 204 connected to the high-capacity low-pressure cuff 203 through a catheter, and a ventilator connector 205 movably installed on one end of the cannula 202, the fixing unit 100 is arranged on the outer ring of the rigid bronchoscope 201, and the cannula 202 is flexible and can be changed according to the environment in which it is used.

[0048] Specifically, the outer ring of the hard bronchoscope 201 is fixedly connected to the inner ring of the fixed tube 101a, the distance between the hard bronchoscope 201 and the second fixed ring 101e is slightly larger than the thickness of the sleeve 202, and the sleeve 202 is adapted to the pressing plate 102a.

[0049] During use, when the rigid bronchoscope 201 is needed for surgery, the ventilator connector 205 at one end of the sleeve 202 needs to be removed first, and then the sleeve 202 is put on the outer ring of the rigid bronchoscope 201, and the sleeve 202 is fixed by the fixing unit 100, and it is ensured that all the side holes of the rigid bronchoscope 201 pass through the sleeve 202 and are located in front of the sleeve 202. After the position of the rigid bronchoscope 201 is determined, the ventilator connector 205 is inflated by the guide air bag 204, and then the surgical operation is performed. After the operation, the rigid bronchoscope 201 and the sleeve 202 are released by the fixing unit 100, and then the position of the sleeve 202 is fixed with one hand, and the rigid bronchoscope 201 is pulled out with the other hand, and the thin end of the ventilator connector 205 is inserted into one end of the sleeve 202. The end of the ventilator connector 205 with a standard outer diameter of 15 mm is connected to the ventilator for mechanical ventilation, and the sleeve 202 is pulled out after the patient is fully awake.

[0050] In summary, when it is necessary to use the rigid bronchoscope 201 for surgery, it is first necessary to remove the ventilator connector 205 at one end of the sleeve 202, then put the sleeve 202 on the outer ring of the rigid bronchoscope 201, and fix the sleeve 202 through the fixing unit 100. After determining the position of the rigid bronchoscope 201, inflate the ventilator connector 205 through the guide air bag 204, and then perform the surgical operation. After the operation, release the fixation of the rigid bronchoscope 201 and the sleeve 202 through the fixing unit 100, then fix the position of the sleeve 202 with one hand, and pull out the rigid bronchoscope 201 with the other hand, insert the thin end of the ventilator connector 205 into one end of the sleeve 202, and connect the end of the ventilator connector 205 with a standard outer diameter of 15 mm to the ventilator for mechanical ventilation. After the patient is fully awake, pull out the sleeve 202. For the operation of the fixing unit 100, see Example 2.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A locking structure, characterized in that: include, A fixing unit (100), the fixing unit (100) comprising a fixing component (101), a pressing component (102) arranged in the fixing component (101), an adjusting component (103) rotating on one side of the fixing component (101), and a limiting component (104) arranged in the adjusting component (103), the fixing component (101) and the adjusting component (103) being rotationally matched, and the adjusting component (103) and the limiting component (104) being slidingly matched.

2. The locking structure according to claim 1, characterized in that: The fixing assembly (101) comprises a fixing cylinder (101a), a first ratchet (101b) fixedly sleeved on the outer ring of the fixing cylinder (101a), and an outer cylinder (101d) arranged on one side of the fixing cylinder (101a), wherein the first ratchet (101b) divides the fixing cylinder (101a) into a first contact surface (L) and a second contact surface (M), and the inner ring of the outer cylinder (101d) is fixedly connected to a positioning column (101h).

3. The locking structure according to claim 2, characterized in that: The two ends of the outer cylinder (101d) are respectively fixedly connected with a first fixing ring (101c) and a second fixing ring (101e); a first sliding groove (101f) is provided on the side of the second fixing ring (101e) facing the inner side of the outer cylinder (101d); one side of the first fixing ring (101c) is fixed to one end of the fixing cylinder (101a); a second sliding groove (101g) is provided on the first fixing ring (101c); and the second sliding groove (101g) corresponds to the first sliding groove (101f).

4. The locking structure according to claim 3, characterized in that: The clamping assembly (102) includes a pressing plate (102a), a positioning hole (102b) penetrating the pressing plate (102a), and sliding rods (102c) respectively fixed on both sides of the pressing plate (102a), one of the sliding rods (102c) slides in a first sliding groove (101f), and the other sliding rod (102c) penetrates a second sliding groove (101g), and the sliding rod (102c) and the second sliding groove (101g) are slidably matched.

5. The locking structure according to claim 3 or 4, characterized in that: The adjustment assembly (103) comprises an adjustment tube (103a) sleeved on the outer ring of the fixing tube (101a), a third fixing ring (103b) and a fourth fixing ring (103c) respectively fixed to the ends of the adjustment tube (103a), and a through groove (103f) symmetrically arranged on the adjustment tube (103a); the inner ring of the fourth fixing ring (103c) is rotationally matched with the second contact surface (M), and the inner ring of the third fixing ring (103b) is rotationally matched with the first contact surface (L).

6. The locking structure according to claim 5, characterized in that: A guide column (103d) is fixedly connected between the third fixing ring (103b) and the fourth fixing ring (103c), and a third sliding groove (103e) is provided on the fourth fixing ring (103c). The third sliding groove (103e) is slidably matched with a sliding rod (102c) that passes through the second sliding groove (101g).

7. The locking structure according to claim 6, characterized in that: The limit assembly (104) comprises a moving ring (104a) sliding on the inner ring of the adjusting cylinder (103a), a second ratchet (104b) fixed to the inner ring of the moving ring (104a), a pulling plate (104e) symmetrically fixed to the outer ring of the moving ring (104a), a guide hole (104c) opened on the moving ring (104a), and a spring (104d) arranged on one side of the moving ring (104a).

8. The locking structure according to claim 7, characterized in that: The second ratchet (104b) is meshed with the first ratchet (101b), the pull plate (104e) is slidably matched with the through groove (103f), the guide column (103d) is adapted to the guide hole (104c) and the spring (104d), and the guide column (103d) is slidably matched with the guide hole (104c), and the two ends of the spring (104d) are respectively fixed to one side of the movable ring (104a) and the inner side of the third fixed ring (103b).

9. A cannula for blocking the airway for a rigid bronchoscope, characterized in that: The locking structure comprises any one of claims 1 to 8; and An operating unit (200) comprises a rigid bronchoscope (201), a sleeve (202) movably mounted on the outer ring of the rigid bronchoscope (201), a high-capacity low-pressure cuff (203) arranged on the outer ring of the sleeve (202), a guide air bag (204) connected to the high-capacity low-pressure cuff (203) via a catheter, and a ventilator connector (205) movably mounted on one end of the sleeve (202), wherein the fixing unit (100) is arranged on the outer ring of the rigid bronchoscope (201).

10. The airway blocking cannula for rigid bronchoscope according to claim 9, characterized in that: The outer ring of the hard bronchoscope (201) is fixedly connected to the inner ring of the fixed tube (101a), the distance between the hard bronchoscope (201) and the second fixed ring (101e) is slightly greater than the thickness of the sleeve (202), and the sleeve (202) is compatible with the pressure plate (102a).

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