Adjustable video bronchial isolation catheter

Abstract

This invention belongs to the field of medical device technology. It discloses an adjustable video bronchial isolation catheter, comprising a ventilation catheter for inserting into a patient's bronchus to block and isolate the ipsilateral lung, and which, when necessary, is also used for ventilation, aspiration, and flexible bronchoscopy; and a video device mounted on the ventilation catheter. The distal portion of the ventilation catheter has a central axis deviation forming a bend, constituting a bend section of the tube. The camera of the video device is located at the junction of the proximal end of the bend section and the adjacent tube at that end, providing a wide field of view for guiding the insertion of the ventilation catheter and for positioning and dynamic monitoring of the catheter. This invention has the advantages of guiding and positioning the insertion of the bronchial isolation catheter to reduce airway damage to the patient, and dynamically monitoring the use of the bronchial isolation catheter.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an adjustable video bronchial isolation catheter. Background Technology

[0002] Lung isolation-one-lung ventilation is an important clinical medical and anesthetic technique, primarily used in open-chest surgery, thoracoscopic examinations, thoracoscopic procedures, and bronchoalveolar lavage. One-lung ventilation is achieved by isolating one lung and selectively ventilating either the ipsilateral or contralateral lung. This allows the ipsilateral lung to collapse to facilitate surgical procedures while preventing contamination of the contralateral lung with blood or pus, thus providing safer conditions for the procedure.

[0003] In clinical practice, one-lung ventilation is commonly achieved using single-lumen endotracheal tubes, double-lumen tubes, bronchial occluders combined with endotracheal tubes, or laryngeal masks. While traditional single-lumen endotracheal tubes can meet the needs of one-lung ventilation, they cannot achieve lung isolation and have therefore been largely phased out in clinical practice. Double-lumen tubes are recognized as the gold standard for lung isolation-one-lung ventilation. They provide ventilation and working access while isolating both lungs, making them particularly suitable for severe alveolar proteinosis requiring lavage, unilateral lung abscess or hemorrhage treatment, and bronchopulmonary fistula treatment. Although double-lumen tubes have significant advantages, their bulky structure can lead to severe airway damage and placement difficulties in challenging airway conditions. Furthermore, if the patient requires mechanical ventilation post-surgery, the double-lumen tube must be removed and reintubated if airway conditions are poor. Using bronchial occluders combined with endotracheal tubes or laryngeal masks overcomes these drawbacks of double-lumen tubes, enabling effective lung isolation and one-lung ventilation in most cases. However, bronchial occluders have the disadvantage of a small lumen (about 2 mm), which cannot provide effective ventilation or a working pathway for the obstructed lung. Therefore, they cannot be used for bronchial lavage, pulmonary hemorrhage, bronchopleural fistula, bronchial surgery, etc. Furthermore, it is unreliable to drain secretions, blood, and pus from the operated lung through the small lumen of the bronchial occluder. In severe cases, it may even become impossible to operate due to blockage or lead to re-inflation of the operated lung.

[0004] To address the shortcomings of single-lumen endotracheal tubes, double-lumen tubes, and bronchial occluders combined with endotracheal tubes or laryngeal masks, recent years have seen the development of bronchial isolation tubes combined with endotracheal tubes or laryngeal masks for lung isolation and one-lung ventilation. This method retains the advantages of double-lumen tubes while avoiding their disadvantages, effectively isolating both lungs while providing separate access for each. Structurally and operationally, bronchial isolation tubes are similar to bronchial occluders, but their larger lumen overcomes the limitations of occluders. However, while the structure of bronchial isolation tubes combined with endotracheal tubes or laryngeal masks for lung isolation and one-lung ventilation theoretically meets many clinical needs, challenges remain, including difficulties in guiding and positioning the isolation tube during insertion, potential tracheal injury during insertion, and the inability to dynamically monitor the use of the isolation tube. These are all technical challenges that urgently need to be addressed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an adjustable video bronchial isolation catheter that can guide and position the insertion of the bronchial isolation catheter to reduce airway damage to the patient, and can dynamically monitor the use of the bronchial isolation catheter.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] On one hand, the present invention provides an adjustable video bronchial isolation catheter, which consists of a ventilation tube and a camera. The ventilation tube is inserted into the patient's airway and enters one bronchus to block and isolate the ipsilateral lung. The ventilation tube is also used for ventilation, aspiration, and flexible bronchoscopy when necessary. A camera is mounted on the ventilation tube. The distal portion of the ventilation tube has a central axis deviation forming a bend, constituting a bend section of the tube. The camera of the video device is located at the junction of the proximal end of the bend section and the adjacent tube at that end, providing a wide field of view for positioning and dynamic monitoring of the ventilation tube. The distal section of the ventilation tube, which extends into the patient's bronchus, is flexible and the curvature is adjustable.

[0008] Preferably, the ventilation tube includes a proximal main tube that extends from outside the patient's mouth, across the oral cavity and pharynx, into the trachea, and down to the bronchial opening. The proximal end of the proximal main tube has a proximal operating opening for performing aspiration and bronchoscopy, and a standard ventilation connector for connecting to the ventilation circuit for ventilation. The distal end of the proximal main tube forms a distal tube that enters the patient's bronchus after two bends, and the central axes of the proximal main tube and the distal tube are normally parallel. The tube between the proximal main tube and the distal tube is a bend section. An isolation cuff is provided on the outer wall of the distal tube for blocking and isolating the corresponding bronchus. The central axes of the proximal main tube and the distal tube are substantially parallel.

[0009] Preferably, the turning section of the pipe forms an angle of 10-20 degrees with the near main pipe and the far main pipe due to the deviation of the central axis. The turning section is a section of pipe approximately 5-8 mm long formed by the deviation of the central axis between the near main pipe and the far main pipe.

[0010] Preferably, the proximal main tube, the turning section tube, and the distal tube are integrally formed to create a continuous ventilation cavity conduit structure with an inner diameter of 3 mm to 5 mm.

[0011] Preferably, the distal section of the tube is made of a soft, flexible material, and the curvature of the distal section is adjusted by a curvature adjustment device provided on the proximal section of the tube.

[0012] Preferably, the curvature adjustment device includes an adjustment turntable sleeved on the outer wall of the proximal main pipe near one end of the standard vent connector, and a flexible structural member embedded in the wall of the distal pipe. It also includes a distal curvature adjustment cavity embedded in the wall of the corresponding side of the distal pipe. The distal curvature adjustment cavity extends to the proximal end of the proximal main pipe and passes through the wall of the proximal main pipe, exiting from the adjustment turntable and communicating with the adjustment turntable. An adjustment wire is provided in the distal curvature adjustment cavity, with one end of the adjustment wire connected to the flexible structural member and the other end of the adjustment wire connected to the adjustment turntable.

[0013] Preferably, the video device includes a camera located on the large bend side of the bend in the ventilation duct, i.e., the camera is located outside the bend arc. It also includes an image guide cavity embedded in the wall of the proximal main body on the side away from the distal arc adjustment cavity, and an image guide in the image guide cavity. The distal end of the image guide is connected to the camera, and the proximal end of the image guide extends out of the outer wall of the proximal main body and is connected to an external display screen and power supply.

[0014] Preferably, the camera is disposed on the outer wall of the near section main body and located at the junction of the near section main body and the turning section main body.

[0015] Preferably, the isolation airbag is connected to an airbag inflation chamber embedded in the wall of the distal section tube away from the distal curvature adjustment cavity. One end of the airbag inflation chamber extends towards the proximal end of the proximal section tube and passes through the wall of the proximal section tube, exiting from the end near the vent connector and connecting to an external inflation device through an inflation tube.

[0016] On the other hand, the present invention also provides a combined lung separation system employing the aforementioned adjustable video bronchial isolation catheter. The combined lung separation system includes an adjustable video bronchial isolation catheter and a guide for guiding the adjustable video bronchial isolation catheter into the patient's bronchus. The guide is a tracheal tube, laryngeal mask airway, or other airway device.

[0017] Preferably, the combined lung separation system further includes a multi-port connector for mating and connecting with a corresponding port of the guide to lock and confine the adjustable video bronchial isolation catheter at the upper end of the guide's ventilation channel, wherein the adjustable video bronchial isolation catheter and the multi-port connector both have standard airway interfaces for connecting to an external breathing circuit.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In this invention, the distal section of the adjustable video bronchial isolation catheter is made of a relatively soft, flexible material with an adjustable curvature. This design allows the adjustable video bronchial isolation catheter to fit the bronchial anatomy for easy placement while minimizing damage to the bronchus. When the distal section of the adjustable video bronchial isolation catheter is inserted into the bronchus, it is slightly curved, with a smaller bend on the inner side and a larger bend on the outer side. Because the camera is positioned on the outer wall of the distal section of the adjustable video bronchial isolation catheter on the side of the larger bend, the camera has a relatively wide field of view, facilitating simultaneous observation of the tracheal carina and the distal section of the isolation catheter within the bronchus.

[0020] In this invention, the camera can also be placed on the ventilation tube of the adjustable video bronchial isolation catheter near the proximal end of its bend section. The bend formed by the deviation of the central axis of the ventilation tube can reduce the obstruction of the camera's field of view by the tube wall, thereby improving the visibility of the patient's tracheal carina. This is beneficial for guiding the ventilation tube into the main bronchus through real-time video and assisting in positioning and reducing tracheal damage during the insertion process.

[0021] For the reasons mentioned above, the present invention has the advantages of guiding and positioning the insertion of a bronchial isolation catheter to reduce airway damage to patients, improve isolation efficiency, and dynamically monitor the working status of the bronchial isolation catheter. Therefore, the present invention has the advantages of guiding and positioning the insertion of a bronchial isolation catheter to reduce airway damage to patients and dynamically monitoring the use of the bronchial isolation catheter. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the adjustable video bronchial isolation catheter described in this invention;

[0024] Figure 2A This is a schematic diagram of the ventilation tube structure of the adjustable video bronchial isolation catheter described in this invention. Figure 1 (Excluding the bend section of the ventilation duct);

[0025] Figure 2B This is a second schematic diagram of the ventilation tube structure of the adjustable video bronchial isolation catheter described in this invention (including the turning section of the ventilation tube body).

[0026] Figure 3A This is a front view of the proximal main body of the adjustable video bronchial isolation catheter described in this invention;

[0027] Figure 3B This is an AA cross-sectional view of the proximal main body of the adjustable video bronchial isolation catheter described in this invention;

[0028] Figure 4 This is a schematic diagram of the adjusting turntable of the adjustable video bronchial isolation catheter described in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the guide tube of the combined lung separation system described in this invention;

[0030] Figure 6 This is a schematic diagram of the laryngeal mask used as the guide in the combined lung separation system described in this invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Ventilation tube; 11. Proximal main tube; 12. Proximal operating opening; 13. Standard ventilation connector; 14. Turning section tube; 15. Distal tube; 16. Curvature adjustment device; 161. Adjustment turntable; 162. Flexible structural component; 163. Distal curvature adjustment cavity; 164. Adjustment wire; 17. Isolation cuff; 171. Cuff inflation cavity; 172. Inflation tube; 2. Video device; 21. Camera; 22. Image guide; 23. Image guide cavity; 10. Combined lung separation system; 100. Adjustable video bronchial isolation tube; 200. Multi-port connector; 300. Guide. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] See Figures 1 to 6 As shown, this embodiment provides an adjustable video bronchial isolation catheter, including a ventilation catheter 1 for inserting into a patient's bronchus to block and isolate the ipsilateral lung, and the ventilation catheter 1 is also used for ventilation, aspiration, and bronchoscopy when necessary, as well as a video device 2 mounted on the ventilation catheter 1; the distal portion of the ventilation catheter 1 has a central axis deviation forming a bend to constitute a bend section tube body 14, and the camera 21 of the video device 2 is located at the junction of the proximal end of the bend section tube body 14 and the adjacent tube body at that end to provide a wide field of view for positioning and dynamic monitoring of the ventilation catheter 1.

[0034] In this embodiment, refer to Figure 1 , Figure 5 and Figure 6 The adjustable video bronchial isolation catheter 100 consists of a ventilation catheter 1 and a video device 2. The ventilation catheter 1 is inserted into the patient's airway and into one bronchus. An isolation cuff 17 is located at the distal end of the ventilation catheter. When inflated, the isolation cuff 17 can block the corresponding bronchus to isolate and close the ipsilateral lung. The inner diameter of the ventilation catheter 1 is approximately 3 mm to approximately 5 mm, thus allowing for ventilation, aspiration of secretions, and bronchoscopic examination of the ipsilateral lung when necessary. Figure 1The ventilation tube 1 has a centrally located proximal operating opening 12 and a lateral standard ventilation connector 13. The proximal operating opening 12 is an operating port with a rotating locking connector, used for procedures such as aspirating secretions from the isolated lung and performing bronchoscopic examinations. The standard ventilation connector 13 is a lateral opening with a cap, used to connect to an external breathing circuit for ventilation or continuous positive pressure oxygenation. Both the proximal operating opening 12 and the standard ventilation connector 13 can allow for deflation and collapse of the target lung, and can also be sealed with caps. The proximal main tube 11 of the ventilation tube 1 is linearly oriented, its length spanning the patient's mouth, pharynx, and down to the lower segment of the trachea.

[0035] In this embodiment, when the adjustable video bronchial isolation catheter 100 is in normal working condition, the distal section 15 of its ventilation catheter 1 is located in the main bronchus on the corresponding side. Figure 5 and Figure 6 The distal section 15 of the ventilation tube 1 is made of a relatively soft and flexible material, with a bending arc between 0 and 45 degrees to accommodate the opening angles of the left and right main bronchi. This adjustable and flexible distal section 15 is beneficial for adapting to the patient's specific anatomical structure or bronchial morphology. Before the distal end of the adjustable video bronchial isolation tube 100 reaches the lower segment of the patient's trachea and enters the bronchus, the distal opening of the ventilation tube 1 is oriented towards the target bronchus, and the distal section 15 of the ventilation tube 1 is adjusted to a certain arc to facilitate the insertion of the distal section 15 into the bronchus. By inflating the isolation cuff 17 surrounding the distal section 15 to block the corresponding main bronchus, the isolation effect on the same lung is achieved. The lumen of the ventilation tube 1 can be used to perform ventilation, aspiration, or bronchoscopy on the same lung when clinically necessary.

[0036] In this embodiment, the distal section 15 of the ventilation duct 1 is made of a soft, flexible material, and the curvature of the distal section 15 is adjusted and controlled by an curvature adjustment device 16 provided on the proximal section 11. Figure 4The curvature adjustment device 16 includes an adjustment turntable 161 sleeved on the outer wall of the proximal main pipe 11 near one end of the standard vent connector 13, and a flexible structural member 162 embedded in the wall of the distal pipe 15. It also includes a distal curvature adjustment cavity 163 embedded in the wall of the distal pipe 15 on a corresponding side. The distal curvature adjustment cavity 163 extends to the proximal end of the proximal main pipe 11 and penetrates the wall of the proximal main pipe 11, exiting from the adjustment turntable 161 and communicating with it. An adjustment wire 164 is provided within the distal curvature adjustment cavity 163, with one end of the adjustment wire 164 connected to the flexible structural member 162 and the other end connected to the adjustment turntable 161. The distal curvature adjustment cavity 163 originates at the position of the adjustment turntable 161 and opens into the inner cavity of the adjustment turntable 161. The distal curvature adjustment cavity 133 extends along the longitudinal axis of the small bend side of the isolation conduit in the wall of the proximal main tube 11, passing through the bend section tube 14 and entering the wall of the distal tube 15. The proximal end of the adjustment wire 164 exits from the proximal opening of the distal curvature adjustment cavity 163 and is connected and fixed to the adjustment turntable 161. The distal end of the adjustment wire 144 is connected to the flexible structural member 162 in the wall of the distal tube 15. By adjusting the adjustment turntable 161, the adjustment wire 164 in the distal curvature adjustment cavity 163 is moved, thereby adjusting the curvature of the flexible member 162 located in the tube wall of the distal tube 15, thus changing the curvature of the distal tube 15.

[0037] In this embodiment, refer to Figure 1 As shown in Figure 2, the video device 2 includes a camera 21 located on the large bend side of the curved section of the ventilation duct 1, an image guide cavity 23 embedded in the wall of the proximal main tube 11 on the side away from the distal curvature adjustment cavity 163, and an image guide 22 located within the image guide cavity 23. The distal end of the image guide 22 is connected to the camera 21, and the proximal end of the image guide 22 extends through the outer wall of the proximal main tube 11 and connects to an external display screen and power supply. The camera 21 is located on the large bend side of the curved section of the ventilation duct 1. That is, the camera 21 is located on the outer wall of the proximal main tube 11 and near the end of the flexible distal tube 15 on the large bend side. Figure 2A This setup utilizes the curvature to increase the field of view of the camera 21, which is beneficial for simultaneously observing the tracheal carina and the isolation airbag 17 after the distal tube 15 is inserted into the bronchus.

[0038] In this embodiment, the ventilation duct 1 can be configured to form a turning section 14 by offsetting the central axis between the proximal main tube 11 and the distal tube 15. The camera 21 is disposed on the outer wall of the proximal main tube 11 and located at the junction of the proximal main tube 11 and the turning section 14. Figure 2B By appropriately avoiding the obstruction of the camera's field of view by the tube wall through the bend, the camera's field of view can be broadened. This is beneficial for improving the visibility of the tracheal carina when the adjustable video bronchial isolation tube 100 is advanced into the patient's trachea, and for guiding the distal tube body 15 into the bronchus.

[0039] In this embodiment, the image guide cavity 23 and the image guide 22 are embedded in the wall of the proximal main body 11 and located on the large bend side of the ventilation duct 1. Figure 3A The image guide 22 is an image guide structure that has undergone solidification or wrapping.

[0040] In this embodiment, the ventilation tube 1 of the adjustable video bronchial isolation catheter 100 includes a proximal main tube 11 that extends from outside the patient's mouth, across the oral cavity and pharynx, into the trachea, and down to the bronchial opening. The proximal end of the proximal main tube 11 has a proximal operating opening 12 for performing aspiration and bronchoscopy, and a standard ventilation connector 13 for connecting the ventilation circuit for ventilation. The distal end of the proximal main tube 11 forms a distal tube 15 that enters the patient's bronchus after two bends, and the central axes of the proximal main tube 11 and the distal tube 15 are normally parallel. The tube between the proximal main tube 11 and the distal tube 15 is a bend section tube 14. An isolation balloon 17 for blocking and isolating the corresponding bronchus is provided on the outer wall of the distal tube 15. The central axes of the proximal main tube and the distal tube are substantially parallel. The curvature of the distal tube 15 is controlled by an adjusting dial 161 installed on the proximal main tube 11 of the ventilation tube 1 and located below the standard ventilation connector 13. The operator can adjust the curvature of the distal tube 15 according to the patient's airway morphology to facilitate the insertion of the adjustable video bronchial isolation catheter 100 and avoid airway injury. Simultaneously, a camera 21 is located at the junction of the proximal main tube 11 and the distal tube 15, and the camera 21 is located on the large bend side wall of the ventilation tube 1. Figure 2A The curved arc at this point faces outwards from the field of view of the camera 21, which can reduce the obstruction of the field of view by the tube wall, and is conducive to observing the tracheal carina, guiding the distal end of the adjustable video bronchial isolation catheter 100 into the bronchus, and determining the position of the isolation airbag 17.

[0041] In this embodiment, the ventilation tube 1 of the adjustable video bronchial isolation catheter 100 can also be selected in another configuration, with the guide 300 being an endotracheal tube or a laryngeal mask. For example... Figure 2BAs shown, the proximal main tube 11 of the ventilation tube 1 passes through a bend section 14, which is formed by a central axis deflection, before extending into the flexible distal tube 15. The bend section 14 is approximately 5 mm to 8 mm long, with a bend angle of approximately 10 to 20 degrees. The bend direction is consistent with the bend direction of the flexible distal tube 15. Therefore, the field of view of the camera 21 can be appropriately increased without significantly increasing the space diameter required for the adjustable video bronchial isolation tube 100 to pass through the guide 300 of the artificial airway; that is, it does not significantly increase the space diameter required for the adjustable video bronchial isolation tube 100 to pass through the tracheal tube of the artificial airway or the laryngeal mask of the artificial airway. Due to the angle of the bend segment 14, the field of view of the camera 21 can be increased by about 15 degrees. This expanded field of view allows for better visualization of the tracheal carina after the distal segment 15 enters the tracheal lumen, which helps guide the distal segment 15 into the target side main bronchus and avoids airway damage that may occur during blind insertion or when the carina is not sufficiently visualized. Although the angle of the bend segment 14 increases the passage diameter of the adjustable video bronchial isolation catheter 100 (i.e., the space required for the adjustable video bronchial isolation catheter 100 to pass through the guide 300) while expanding the field of view, the increase in passage diameter is only about 2 mm due to the limited angle. Therefore, it will not have a significant impact on the passage of the adjustable video bronchial isolation catheter 100 through the guide 300.

[0042] In this embodiment, the isolation airbag 17 is connected to an airbag inflation chamber 171 embedded in the wall of the distal section tube 15 away from the distal curvature adjustment cavity 163. One end of the airbag inflation chamber 171 extends towards the proximal end of the proximal section main tube 11 and passes through the wall of the proximal section main tube 11, exiting from the end near the vent connector 13 and connecting to an external inflation device through an inflation tube 172.

[0043] In this embodiment, the ventilation tube 1 of the adjustable video bronchial isolation catheter 100 is embedded in the wall of an airbag inflation chamber 171, a distal curvature adjustment chamber 163, and an image guide 22. Figure 3A The image guide 22 is embedded in the large bend side wall of the ventilation duct 1, and the corresponding distal curvature adjustment cavity 163 is embedded in the small bend side wall of the ventilation duct 1. The airbag inflation cavity 171 is embedded in the side wall of the ventilation duct 1 between the two. Figure 3B ).

[0044] In this embodiment, the relative positions of the distal curvature adjustment cavity 163, the airbag inflation cavity 171, and the image guide 22 can be freely changed according to requirements.

[0045] In this embodiment, the adjustable video bronchial isolation catheter 100 can be manufactured in different sizes to suit patients of different body types. At the same time, since the anatomical structures of the left and right main bronchi of the human body are significantly different, the adjustable video bronchial isolation catheter 100 can be manufactured as a left isolation catheter adapted to be inserted into the left main bronchi of the patient, and a right isolation catheter adapted to be inserted into the right main bronchi of the patient. The distal tube body 15 of the left isolation catheter is 35 mm long, and the distal tube body 15 of the right isolation catheter is 20 mm long.

[0046] In this embodiment, a suitable guide 300, i.e., a suitable endotracheal tube or laryngeal mask airway, and an adjustable video bronchial isolation tube 100 of the corresponding specifications are selected in advance according to clinical needs. After the patient is induced with general anesthesia, muscle relaxants are used or not used according to clinical indications. An appropriate method is used to insert the endotracheal tube or laryngeal mask airway into the patient's airway and confirm its normal operation. The multi-port connector 200 is connected, and the lateral interface of the multi-port connector 200 is used to connect to the breathing circuit and ventilate the patient with 100% oxygen. Then, the camera 21 of the adjustable video bronchial isolation tube 100 is activated. The distal end of the adjustable video bronchial isolation tube 100 is inserted into the ventilation cavity of the endotracheal tube or laryngeal mask airway through the central opening of the multi-port connector 200. It is important to control the curvature of the distal tube body 15 to about 0 degrees, so that the distal tube body 15 remains relatively straight, thereby reducing the resistance and space required when the ventilation tube 1 passes through the endotracheal tube or laryngeal mask airway. Under the real-time video monitoring and guidance of the camera 21, Advance the ventilation tube 1 until the distal tube 15 reaches the patient's trachea. Once the distal tube 15 enters the larger diameter tracheal lumen, aim the camera 21 at the tracheal carina. The angle of the bend section 14 of the ventilation tube 1 will help visualize the tracheal carina. Further, the adjustment dial 161 can be adjusted under the limitation of the distal curvature adjustment chamber 163 to control the adjustment wire 164 to move the flexible structural component 162 to adjust the curvature of the distal tube 15 to fit the direction of the target side main bronchus, so that the distal opening of the ventilation tube 1 is aligned with the opening of the target bronchus. Continue advancing until the distal tube 15 enters the main bronchus lumen. Then, determine the position of the isolation cuff 17 through video. Finally, determine whether the adjustable video bronchial isolation tube is working properly by conventional methods such as auscultation and end-tidal CO2 detection.

[0047] In this embodiment, after the insertion of the adjustable video bronchial isolation catheter 100 is completed, the exposed end of the inflation tube 172 is connected to an external inflation device. Under the constraint of the cuff inflation chamber 171, the inflation device is activated to inflate the isolation cuff 17 located on the outer wall of the distal tube 15 through the inflation tube 172. The adjustable video bronchial isolation catheter 100 isolates the ipsilateral lung from the contralateral lung and also separates it from the ventilation lumen of the guide 300 (i.e., endotracheal tube or laryngeal mask). Therefore, after the isolation cuff 17 is inflated, ventilation of the contralateral lung can be performed through the ventilation chamber of the guide 300, while ventilation, aspiration, or bronchoscopy of the ipsilateral lung can be performed through the adjustable video bronchial isolation catheter 100. When the isolation cuff 17 is deflated, ventilation of both lungs can be performed through the ventilation chamber of the guide 300, at which point airflow is established between the two lungs without isolation.

[0048] In this embodiment, after confirming the positions of the distal tube 15 and the isolation cuff 17, the adjustable video bronchial isolation catheter 100 is locked to the upper end of the ventilation channel of the endotracheal tube or laryngeal mask via the multi-port connector 200. After one-lung ventilation is completed, the air in the isolation cuff 17 is withdrawn, and the connection between the adjustable video bronchial isolation catheter 100 and the endotracheal tube or laryngeal mask is released by operating the multi-port connector 200. Then, the adjustable video bronchial isolation catheter 100 is removed, and ventilation is maintained using the endotracheal tube or laryngeal mask until the patient awakens.

[0049] In this embodiment, a combined lung separation system 10 employing an adjustable video bronchial isolation catheter 100 is provided. The combined lung separation system 10 includes the adjustable video bronchial isolation catheter 100 and a guide 300 for guiding the adjustable video bronchial isolation catheter 100 into the patient's bronchus. The combined lung separation system 10 further includes a multi-port connector 200 for mating and connecting with a corresponding port of the guide 300 to lock and confine the adjustable video bronchial isolation catheter 100 to the upper end of the ventilation channel of the guide 300. Both the adjustable video bronchial isolation catheter 100 and the multi-port connector 200 have standard airway interfaces for connecting to an external breathing circuit.

[0050] In this embodiment, the process of introducing the adjustable video bronchial isolation catheter 100 into the patient's trachea differs slightly depending on the selection of the guide 300. Using an endotracheal tube, the distal end of the adjustable video bronchial isolation catheter 100 can be directly introduced into the patient's trachea. During insertion, the distal tube body 15 should be bent at approximately 0 degrees, and the adjustable video bronchial isolation catheter 100 should be in a straight line to facilitate passage through the lumen of the endotracheal tube. This is particularly important if the adjustable video bronchial isolation catheter 100 has a bend section 14, as the bend section 14 increases the diameter of the passage space of the adjustable video bronchial isolation catheter 100 by 1-2 mm. When the distal end of the adjustable video bronchial isolation catheter 100 extends from the distal opening of the tracheal tube into the patient's tracheal lumen, the distal tube body 15 is promptly adjusted to an appropriate curvature to align the distal opening of the adjustable video bronchial isolation catheter 100 with the opening of the target bronchus. Under the video guidance of the camera 21, the distal tube body 15 is then inserted into the target bronchus.

[0051] In this embodiment, if a laryngeal mask airway is used for combined lung dissection, the adjustable video bronchial isolation catheter 100 must first pass through the glottis before reaching the patient's trachea after entering the laryngeal mask airway. When the adjustable video bronchial isolation catheter 100 passes through the glottis, care should be taken to ensure that the proximal tube body 11 is perpendicular to the camera 21 of the video device 2, and that the camera 21 is positioned below the adjustable video bronchial isolation catheter 100, passing through the maximum gap of the glottis, to avoid frictional damage to the vocal cords caused by the camera 21. After the adjustable video bronchial isolation catheter 100 passes through the glottis, it should be rotated 90 degrees and the distal tube body 15 adjusted to a suitable curvature towards the target bronchus. Under the video guidance of the camera 21, the distal tube body 15 is then inserted into the target bronchus.

[0052] In this embodiment, if the patient requires bilateral lung ventilation but not lung separation, the isolation cuff 17 can be left uninflated. Therefore, the adjustable video bronchial isolation catheter 100 will not block the target side main bronchus. In this case, the guide 300 can provide access and ventilation to both lungs. If the patient requires both bilateral lung ventilation and lung separation, the isolation cuff 17 can be inflated to isolate the target lung from the contralateral lung. The adjustable video bronchial isolation catheter 100 provides ventilation and access to the target (i.e.) lung, while the guide 300 provides ventilation and access to the contralateral lung. When surgery requires unilateral lung ventilation, the isolation cuff 17 should remain inflated to block the target lung, while the standard ventilation connector 13 should be open to facilitate deflation and collapse of the target lung, providing conditions for surgery. The guide 300 also provides ventilation and access to the contralateral non-surgical lung.

[0053] In this embodiment, the main structure and usage of the adjustable video bronchial isolation catheter 100 are similar to those of a traditional bronchial occluder, but their functions differ. A bronchial occluder can only block the target lung but cannot provide ventilation or access for manipulation. The adjustable video bronchial isolation catheter 100 has a sufficiently large inner diameter, allowing for more effective deflation and collapse of the target lung, while also providing ventilation and access for manipulation. Therefore, when using the adjustable video bronchial isolation catheter 100 for combined lung dissection, it can isolate either the surgical or diseased lung, and simultaneously provide a suitable access for the ipsilateral lung for aspiration, lavage, bronchoscopy, continuous positive airway pressure (CPAP), and independent ventilation. From this perspective, the combined lung dissection technique using the adjustable video bronchial isolation catheter 100 is more like a double-lumen catheter, but more agile and less likely to damage the airway. Furthermore, the success rate of placing a double-lumen tube is low in difficult airway situations, while the success rate of placing a conventional endotracheal tube or laryngeal mask airway is higher. Therefore, the adjustable video bronchial isolation tube 100 combined with the guide 300 is more suitable for providing lung dissection and one-lung ventilation anesthesia for patients with difficult airways. And after surgery, if the patient requires continued positive pressure ventilation, the adjustable video bronchial isolation tube 100 can be removed while the guide 300 remains in place. Therefore, the combined system of the guide 300 and the adjustable video bronchial isolation tube 100 provides the benefits of both a double-lumen tube and a bronchial occluder while avoiding their respective disadvantages.

[0054] In this embodiment, the flexible structural member 162 is either a spring wire or a snake bone.

[0055] In this embodiment, the guide 300 is an endotracheal tube or a laryngeal mask with intubation function.

[0056] In this specific application, a suitable guide 300 is pre-selected, i.e., an appropriate endotracheal tube or laryngeal mask airway. The guide 300 is placed into the patient's mouth using a suitable method, and its normal operation is confirmed. The camera 21 of the video device 2 is activated. Under the real-time video monitoring guidance of the camera 21, the proximal main tube 11 of the ventilation tube 1 is operated so that the distal tube 15 extends from the corresponding operating inlet of the guide 300 into the main bronchus. At this time, the proximal main tube 11 and the adjustment dial 161 of the curvature adjustment device 16 are both located outside the patient's mouth. The distal tube 15 of the ventilation tube 1 is inserted into the lumen of the patient's bronchus. The distal tube 15 is bendable and adjustable. The distal tube 15 is embedded with a flexible structural member 162 to control the bending curvature, which is between 0 and 45 degrees to adapt to the opening angle of the main bronchus of the left and right lungs. The outer wall of the distal tube 15 is provided with an isolation airbag 17 for blocking the airway. It is connected to an external inflation device through an inflation tube 172. When the inflation device is started, under the protection and limitation of the inflation tube 172 by the inflation chamber 171 of the airbag, the inflation device delivers a predetermined amount of gas to the isolation airbag 17 through the inflation tube 172. After the isolation airbag 17 is inflated, it expands to fix the distal tube 15 and block the main bronchus where the isolation is located, thereby meeting the subsequent ventilation of the isolated side lung, as well as aspiration and bronchoscopy examination operations. Before the distal tube 15 begins, there is a transition tube 14 that connects to the proximal main tube 11. It is a continuation of the proximal main tube 11 but deviates from the proximal main tube 11 to form an angle of about 15 degrees. This angle causes the central axis of the distal tube 15 to deviate from the central axis of the proximal main tube 11, but the two central axes are basically parallel and do not overlap. Due to the angle of the transition tube 14, the ventilation duct 1 has a long axis and a short axis. When placing the ventilation tube 1, first operate the adjustment dial 161 of the curvature adjustment device 16 to control the movement of the adjustment wire 164. Under the protection and limitation of the distal curvature adjustment cavity 163, the adjustment wire 164 controls the flexible structural member 162 to drive the distal tube body 15 to move along a predetermined trajectory, thereby controlling the curvature of the distal tube body 15 to about 0 degrees, keeping the distal tube body 15 relatively straight, thereby reducing the resistance and space required when the ventilation tube 1 passes through the guide 300. After the distal tube body 15 enters the tracheal lumen with a larger diameter, the adjustment dial 161 controls the adjustment wire 164 to adjust the flexible structural member 162 to drive the movement of the distal tube body 15, thereby adjusting the distal tube body 15 to a curvature suitable for the opening of the target side main bronchus, so as to facilitate the entry of the adjustable video bronchial isolation tube 100 into the target side main bronchus.

[0057] Therefore, the adjustable video bronchial isolation catheter 100 involved in this invention has the following features to ensure the effectiveness and safety of lung isolation and one-lung ventilation:

[0058] 1) The distal tube 15 of the adjustable video bronchial isolation catheter 100 is made of a flexible and adjustable soft material, which facilitates the entry of the distal tube 15 into the main bronchus, and does not affect the passage of the distal tube 15 through the guide 300 due to the curvature, while also reducing the risk of airway damage.

[0059] 2) The lumen of the ventilation tube 1 of the adjustable video bronchial isolation tube 100 is not straight. Due to the angle of the turning section tube 14, the central axis of the distal tube 15 is almost parallel to but does not overlap with the central axis of the proximal main tube 11. This can increase the field of view of the camera 21 located at the end of the proximal main tube 11 without affecting the space required for the adjustable video bronchial isolation tube 100 to pass through the guide 300.

[0060] 3) The camera 21 of the video device 2 is installed at the junction of the proximal main tube 11 and the turning section tube 14, which can reduce the obstruction of the camera 21's field of view by the tube wall and effectively improve the visibility of the tracheal carina, thus facilitating the guidance of the adjustable video bronchial isolation catheter 100 into the main bronchus.

[0061] In summary, the present invention, with the above-described structure, has the advantages of guiding and positioning the insertion of the bronchial isolation catheter to reduce airway damage to the patient, and dynamically monitoring the use of the bronchial isolation catheter.

[0062] Other methods for determining the effectiveness of lung separation and one-lung ventilation, as well as precautions for one-lung ventilation, management of hypoxemia, evaluation of laryngeal mask performance and troubleshooting, and methods for simultaneously connecting isolation tubes and endotracheal tubes or laryngeal masks, are not the subject of this invention. They can be found in many other documents and are knowledge and skills that practitioners of lung separation and one-lung ventilation techniques should possess.

[0063] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. An adjustable video bronchial isolation catheter, comprising a ventilation catheter (1) for inserting into a patient's bronchus to block and isolate the ipsilateral lung, and the ventilation catheter (1) also being used, when necessary, for ventilation, aspiration, and flexible bronchoscopy, and a video device (2) disposed on the ventilation catheter (1); characterized in that: The distal portion of the ventilation duct (1) has a central axis deviation to form a bend and constitute a bend section tube (14). The camera (21) of the video device (2) is located at the junction of the proximal end of the bend section tube (14) and the adjacent tube at that end to provide a wide field of view for positioning and dynamic monitoring of the ventilation duct (1).

2. The adjustable video bronchial isolation catheter according to claim 1, characterized in that: The ventilation tube (1) includes a proximal main tube (11) that extends from outside the patient's mouth across the oral cavity and pharynx into the trachea until the opening of the bronchus. The proximal end of the proximal main tube (11) has a proximal operating opening (12) for performing aspiration and bronchoscopy and a standard ventilation connector (13) for connecting the ventilation circuit for ventilation. The distal end of the proximal main tube (11) forms a distal tube (15) for entering the patient's bronchus after two bends. The central axes of the proximal main tube (11) and the distal tube (15) are normally parallel. The tube between the proximal main tube (11) and the distal tube (15) is a bend section tube (14). An isolation balloon (17) for blocking and isolating the corresponding bronchus is provided on the outer wall of the distal tube (15). The central axes of the proximal main tube and the distal tube are basically parallel.

3. The adjustable video bronchial isolation catheter according to claim 2, characterized in that: The turning section pipe (14) forms an angle of 10-20 degrees with the near section main pipe (11) and the far section pipe (15) due to the deviation of the central axis.

4. The adjustable video bronchial isolation catheter according to claim 2, characterized in that: The distal tube (15) is made of a soft, flexible material and the curvature of the distal tube (15) is adjusted by a curvature adjustment device (16) provided on the proximal tube (11).

5. The adjustable video bronchial isolation catheter according to claim 2, characterized in that: The proximal main tube (11), the turning section tube (14), and the distal tube (15) are integrally formed to create a continuous ventilation cavity conduit structure with an inner diameter of 3 mm to 5 mm.

6. The adjustable video bronchial isolation catheter according to claim 4, characterized in that: The curvature adjustment device (16) includes an adjustment turntable (161) sleeved on the outer wall of the proximal main pipe (11) near one end of the standard vent connector (13), and a flexible structural member (162) embedded in the wall of the distal pipe (15). It also includes a distal curvature adjustment cavity (163) embedded in the wall of the distal pipe (15) on the corresponding side. The distal curvature adjustment cavity (163) extends to the proximal end of the proximal main pipe (11) and passes through the wall of the proximal main pipe (11), exiting from the adjustment turntable (161) and communicating with the adjustment turntable (161). An adjustment wire (164) is provided in the distal curvature adjustment cavity (163), and one end of the adjustment wire (164) is connected to the flexible structural member (162), and the other end of the adjustment wire (164) is connected to the adjustment turntable (161).

7. The adjustable video bronchial isolation catheter according to claim 6, characterized in that: The video device (2) includes a camera (21) located on the large bend side of the bend in the ventilation duct (1), an image guide cavity (23) embedded in the wall of the proximal main body (11) on the side away from the distal arc adjustment cavity (163), and an image guide (22) located in the image guide cavity (23). The distal end of the image guide (22) is connected to the camera (21), and the proximal end of the image guide (22) extends out of the outer wall of the proximal main body (11) and is connected to an external display screen and power supply.

8. The adjustable video bronchial isolation catheter according to claim 7, characterized in that: The camera (21) is disposed on the outer wall of the near section main body (11) and located at the junction of the near section main body (11) and the turning section main body (14).

9. The adjustable video bronchial isolation catheter according to claim 6, characterized in that: The isolation airbag (17) is connected to an airbag inflation chamber (171) embedded in the wall of the distal section tube (15) away from the distal section curvature adjustment cavity (163). One end of the airbag inflation chamber (171) extends toward the proximal end of the proximal section main tube (11) and passes through the wall of the proximal section main tube (11), exiting from the end near the vent connector (13) and connecting to an external inflation device through an inflation tube (172).

10. A combined lung separation system employing the adjustable video bronchial isolation catheter as described in any one of claims 1 to 9, characterized in that: The combined lung separation system (10) includes an adjustable video bronchial isolation catheter (100) and a guide (300) for guiding the adjustable video bronchial isolation catheter (100) into the patient's bronchus.

11. The combined lung separation system according to claim 10, characterized in that: The combined lung separation system (10) further includes a multi-port connector (200) for mating with a corresponding port of the guide (300) to lock and limit the adjustable video bronchial isolation catheter (100) to the upper end of the ventilation channel of the guide (300), wherein the adjustable video bronchial isolation catheter (100) and the multi-port connector (200) are both equipped with standard airway interfaces for connection to external breathing circuits.

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