Lung segment bronchial catheter

Abstract

The application provides a lung segment bronchus catheter, which comprises a catheter tail end ventilation and suction interface, a cuff inflation device, an outer tube, an inner tube, a front end cuff and a guide end formed by the inner tube; the cuff is annularly arranged on the outer surface of the catheter head, and is in the form of a ring ball wrapped around the inner tube in the inflated state; the cuff inflation interface and the cuff inflation conduit are communicated between the gap between the outer tube and the inner tube at the catheter tail and lead to the cuff; the catheter ventilation and suction interface is communicated with the inner tube and the guide end formed by the inner tube, and a guide wire is arranged in the catheter ventilation and suction interface to form a straight lumen. The catheter can enter the target lung segment or sub-lung segment bronchus through the operation channel of the bronchoscope, the inflated cuff seals the airway cavity around the lung segment bronchus catheter cavity, then the guide wire is pulled out from the lung segment bronchus catheter cavity, the target lung segment or sub-lung segment is inflated through the catheter ventilation and suction interface, so that the anatomical range of the target lung segment or sub-lung segment after ventilation is revealed, the technical problem that a thoracic surgeon cannot accurately identify the anatomical range of the target lung segment in the operation is effectively solved, and the thoracic surgery anatomical partial lobectomy operation is facilitated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a segmental bronchial catheter. Background Technology

[0002] A bronchus is a segment of the trachea that branches off from the carina to the hilum of the lung. There is one bronchus on each side. The bronchus enters the lung from the hilum and continuously branches, forming a tree-like structure called the bronchial tree. In humans, the bronchus (first level) has approximately 24 levels of branches from the first to the alveoli. After entering the lung through the hilum, the bronchus divides into lobar bronchus (second level): 3 in the right lung and 2 in the left lung. The lobar bronchus further divides into segmental bronchus (third- and fourth levels): 10 in each lung. The segmental bronchi repeatedly branch into bronchioles (levels 5-10), which then further branch into bronchioles (levels 11-13). The bronchioles then branch into terminal bronchioles (levels 14-16). From the lobar bronchi to the terminal bronchioles, the lungs form the air-conducting part. The branches below the terminal bronchioles form the respiratory part of the lungs, including the respiratory bronchioles (levels 17-19), alveolar ducts (levels 20-22), alveolar sacs (level 23), and alveoli (level 24).

[0003] A crucial prerequisite for achieving precise and minimally invasive thoracic surgery treatment of pulmonary nodules is intraoperative one-lung ventilation and precise airway management. Traditional one-lung ventilation can only manage the airway of the main bronchus but cannot achieve controlled ventilation of segmental bronchi, failing to meet the rapidly evolving needs of thoracoscopic anatomical segmentectomy and necessitating technological updates. In particular, controlled ventilation technology of the target segmental bronchus can selectively expand the diseased lung segment under one-lung ventilation, effectively solving the technical challenge of thoracic surgeons accurately identifying the anatomical extent of the target lung segment during surgery. Furthermore, this equipment and technology lay the foundation for interventional treatment of pulmonary nodules via segmental bronchi.

[0004] In thoracic surgery, bronchial occluders are often used in conjunction with endotracheal tubes to block one bronchus, achieving unilateral lung occlusion on the blocked side and unilateral lung ventilation on the contralateral side. After the blocked lung collapses, the pleural cavity on that side has surgical space to facilitate surgical operations, while unilateral lung ventilation maintains the patient's overall oxygen supply and gas exchange. However, bronchial occluders are rarely used and are not suitable for occluding segmental bronchi because they lack visualization capabilities and require fiberoptic bronchoscope guidance. Their function focuses on occlusion rather than ventilation, and their directional selection during advancement is not very flexible. Bronchial occluders typically require the assistance of a fiberoptic bronchoscope to observe and guide the insertion position of the occluder tip and the location of the cuff blockage. This procedure increases the difficulty of airway management for patients. During the procedure, the fiberoptic bronchoscope and the occluder run parallel, sharing the limited space within the endotracheal tube. Even if the occluder is accurately positioned, removing the fiberoptic bronchoscope may cause a change in its position. Furthermore, the lateral decubitus position required during thoracic surgery and the changes in tracheal position caused by surgical procedures can indirectly lead to misalignment of the occluder tip, requiring repeated adjustments with the assistance of a fiberoptic bronchoscope. Therefore, the clinical application of bronchial occluders requires medical personnel to master the coordination of multiple instruments, which is not conducive to the rapid and accurate implementation of bronchial airway management during surgery and anesthesia, and is even less suitable for segmental bronchial obstruction.

[0005] Therefore, minimally invasive thoracic surgery urgently needs a bronchial catheter that can be inserted into the target lung segment or subsegmental bronchus through an operating channel under the guidance of fiberoptic bronchoscopy. With one lung collapsed, the cuff at the end of the catheter is inflated to block the opening of the segmental bronchus where the catheter is located. Then, air is inflated into the target lung segment through the lumen of this segmental bronchial catheter, thereby selectively expanding the target lung segment. During the operation, this helps surgeons identify and determine the target lung segment, effectively solving the technical problem that thoracic surgeons cannot accurately identify the anatomical range of the target lung segment during surgery, and assisting in precise minimally invasive treatment in thoracic surgery. Summary of the Invention

[0006] To address the aforementioned issues and facilitate anatomical localization of lung segments through segmental bronchial inflation, thereby aiding thoracic surgeons in accurately identifying target lung segments, this invention develops a segmental bronchial catheter for precise airway management after one-lung ventilation. Used in conjunction with a fiberoptic bronchoscope, the catheter is inserted through the bronchoscope's operating channel. This allows for precise airway management of selective target lung segment bronchus or small bronchus, addressing the needs of minimally invasive thoracoscopic anatomical partial lobectomy (segmental / subsegmental / combined subsegmental) resection. This enables surgeons to accurately identify the anatomical structure of the target lung segment, solving the technical challenge of identifying functional lung segments during surgery and ultimately facilitating the successful implementation of thoracic anatomical partial lobectomy.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A segmental bronchial catheter, the segmental bronchial catheter comprising:

[0009] The catheter body 1 includes an outer tube 2, an inner tube 3, and a guide end 4 formed by extending the inner tube 3. The length of the outer tube 2 at the catheter head 11 is less than the length of the inner tube 3 at the catheter head 11.

[0010] The cuff 8 is arranged in a ring on the outer surface of the catheter head 11; one end of the cuff 8 near the tail side is arranged in a ring on the outer tube 2 of the catheter head, and the other end near the head side is arranged in a ring on the inner tube 3 of the catheter head; when inflated, the cuff 8 is arranged in a ring around the inner tube 3.

[0011] A cuff inflation conduit 9, one end of which is connected to the cavity between the outer tube 2 and the inner tube 3, and the other end is connected to an inflation port, wherein the inflation port is an elastic compressible inflatable airbag connector 16 and / or a cuff pressure limiting pre-inflation device, used to inflate the cuff 8.

[0012] The catheter ventilation and suction port 13 is fixedly connected to the inner tube 3, and the catheter ventilation and suction port 13 is connected to the inner cavity of the guide end 4 through the inner cavity of the inner tube 3.

[0013] Furthermore, the pressure-limiting pre-inflation device includes a spring-loaded compressible inflatable connector 21, a pressure-limiting pre-inflation airbag 15, and an on / off valve 14 connected in sequence.

[0014] Furthermore, the length of the sheath 8 is 5-10 mm, and the sheath expands into a spherical shape with a radius of 2-10 mm.

[0015] Furthermore, the guide end 4 is a hollow columnar or conical columnar shape with a length of less than 5 mm. The outer side of the guide end 4 has a side hole that communicates with the inner cavity of the guide end 4.

[0016] Furthermore, the catheter body 1 is cylindrical, the outer diameter of the outer tube 2 is 1.5 to 2.8 mm, and the inner diameter of the inner tube 3 is 1.5 to 2.5 mm.

[0017] Furthermore, it also includes a guide wire 5, a Y-type adapter 6, and a fixing nut 7 with a through hole. The fixing nut 7, when connected to the Y-type adapter, can lock the guide wire 5 that passes through both.

[0018] Furthermore, one end 61 of the straight cavity of the Y-type adapter 6 can be sealed to the venting and suction interface 13 of the conduit. The other end 62 of the straight cavity of the Y-type adapter 6 is composed of a hollow tapered tube 63 and a hollow threaded column tube 64. An elastic fastener 65 with a through hole is provided in the tapered tube 63. A gasket 66 is provided inside the threaded column section 64, and an external thread is provided on the outer surface. The diameter of the through hole of the elastic fastener 65 is slightly larger than the diameter of the guide wire 5. The inner surface of one end of the fixing nut 7 is provided with an internal thread that is compatible with the external thread of the threaded column section 64. Several anti-slip strips 71 are provided on the outer surface of the fixing nut 7. A fixing post 72 is provided inside the fixing nut 7 to press the gasket 66.

[0019] Furthermore, the catheter ventilation and suction interface 13 is a Luer male connector with a snap-fit ​​connector 17, one end 61 of the straight cavity of the Y-type conversion connector 6 is a Luer female connector, and the other end of the fixing nut 7 is a Luer female connector.

[0020] Furthermore, the guide wire 5 is an elastic steel wire, or is composed of a metal strip and a metal wire spirally wrapped around the metal strip, the surface of which is coated with polytetrafluoroethylene.

[0021] Furthermore, the segmental bronchial tube is used for airway management, and the airway includes, but is not limited to, lung segments, lung subsegments, and small bronchi.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] This invention develops a segmental bronchial catheter for precise airway management after one-lung ventilation. It is inserted through the operating channel of a fiberoptic bronchoscope and used in conjunction with the bronchoscope. The fiberoptic bronchoscope allows real-time observation of the catheter tip and cuff position. In clinical use, it allows for real-time observation and guidance of the catheter tip into the target segmental bronchus or lower-level lung segment. Furthermore, it allows for observation of the tracheal and bronchial tissue morphology during the catheter's movement. Addressing the needs of precise minimally invasive thoracoscopic anatomical partial lobectomy (segmental / subsegmental / combined subsegmental) resection, this invention enables precise airway management of the selective target segmental bronchus, allowing surgeons to accurately identify the anatomical structure of the target lung segment. This solves the technical challenge of identifying functional lung segments during surgery, thereby facilitating the successful implementation of anatomical partial lobectomy in thoracic surgery. It also saves anesthesia and surgical time and improves the safety of thoracic surgery. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a segmental bronchial duct according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a segmental bronchial duct according to another embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the head of a segmental bronchial tube according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a Y-type adapter according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of a fixing nut according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the assembly of the catheter tail during guidewire insertion according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the position of the catheter head when the guidewire head extends slightly beyond the guide end according to an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be reviewed and described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indicators in this embodiment (such as proximal end, distal end, front end, rear end, etc.) are only used to explain the relative positional relationship and movement of each component under normal operating posture. That is, the side closer to the operator is called the proximal end, rear end or tail, and the side farther away from the operator is called the distal end, front end or head. If the operating posture changes, the directional indicator will also change accordingly.

[0034] According to the present invention, a segmental bronchial catheter is provided, such as Figures 1-3As shown, it includes:

[0035] The catheter body 1 includes an outer tube 2 and an inner tube 3. The length of the outer tube 2 at the catheter head 11 is less than the length of the inner tube 3 at the catheter head 11. The outer tube 2 is coated with a hydrophilic lubricating coating so that the catheter can move easily and conveniently in the operating channel of the bronchoscope.

[0036] Cuff 8, the cuff 8 is arranged in a ring on the outer surface of the catheter head 11; such as Figure 3 As shown, the cuff 8 is arranged in a ring shape on the outer tube 2 of the catheter head at one end near the tail side, and in a ring shape on the inner tube 3 of the catheter head at the other end near the head side. When the cuff 8 is inflated, it wraps around the inner tube 3 in a ring shape.

[0037] One end of the cuff inflation conduit 9 is connected to the cavity between the outer tube 2 and the inner tube 3, and the other end is connected to the inflation port. The inflation port includes an elastic compressible inflatable airbag connector 16 and / or a cuff pressure-limiting pre-inflation device (including an elastic compressible inflatable connector 21, a pressure-limiting pre-inflation airbag 15, and an on / off valve 14 connected in sequence), used to inflate the cuff 8. The elastic compressible inflatable airbag connector can have various forms, such as... Figure 1 and Figure 2 As shown in the image.

[0038] The guide end 4 extends from the front end of the inner tube 3 and can be a hollow columnar shape (such as...). Figure 1 (as shown) or conical (such as) Figure 2As shown in the diagram, the guide wire 4 is designed to facilitate smooth insertion into the patient's segmental or subsegmental bronchus through the operating channel of the fiberoptic bronchoscope. The guide wire 4 is less than 5 mm in length. The guide wire 4 is a hollow structure that communicates with the cavity of the inner tube 3. The inner lumen of the inner tube 3 accommodates the guide wire 5 inserted through the ventilation and suction interface 13. Under normal conditions, the tip of the guide wire 5 is smooth and does not extend beyond the tip of the guide wire 4 to avoid damage to the bronchial branch airway mucosa. When the guide wire 5 is inside the segmental bronchus catheter lumen, it significantly increases the catheter's rigidity and facilitates insertion or removal along its long axis, allowing the operator to easily insert the catheter through the operating channel of the fiberoptic bronchoscope into the patient's segmental or subsegmental bronchus. After the catheter reaches the intended position, it is de-energized by elasticity. The compressible inflatable cuff connector 16 and / or the cuff pressure-limiting pre-inflation device inflates the cuff 8. The inflated cuff 8 seals the airway around the segmental bronchus tube lumen. Then, the guidewire 5 is pulled out from the segmental bronchus tube lumen, and air is inflated into the target lung segment or subsegmental bronchus through the catheter ventilation and suction interface 13, thereby expanding the target lung segment or subsegmental bronchus and exposing the anatomical range of the target lung segment or subsegmental bronchus after ventilation. This effectively solves the technical problem that thoracic surgeons cannot accurately identify the anatomical range of the target lung segment during surgery, guiding the surgeon to further surgical operations. The sealing cap 17 corresponds to the catheter ventilation and suction interface 13 and can be used to seal the catheter ventilation and suction interface 13 after the segmental bronchus tube has completed the expansion of the target lung segment or subsegmental bronchus, maintaining the inflated state of the target lung segment or subsegmental bronchus.

[0039] In one embodiment, the guide end 4 has a side hole communicating with its inner cavity so that air can be ventilated from the side when the head of the guide end is blocked by airway secretions.

[0040] The ventilation and suction port 13 is fixedly connected to the tail end of the inner tube 3, serving as the main lumen of the segmental bronchus catheter. When the segmental bronchus catheter is ready for use, the guidewire 5 passes through the straight lumen of the Y-type conversion connector 6 and the fixing nut 7 with a through hole, the ventilation and suction port 13, and the inner tube 3, reaching the guide end 4, but does not protrude beyond the front end of the guide end 4 to avoid damage to the mucosal tissue of the bronchial branch airway. The operator inserts the segmental bronchus catheter with the guidewire through the operating channel of the fiberoptic bronchoscope to the predetermined position of the patient's segmental or subsegmental bronchus.

[0041] In one embodiment, the outer tube 2 and the inner tube 3 are closed and connected at the cuff inflation conduit 9 near the air inlet and suction port 13 at the end of the conduit. The air injected through the cuff inflation conduit 9 is injected into the cuff 8 along the interlayer between the outer tube 2 and the inner tube 3, so that the cuff 8 is inflated and surrounds the inner tube 3 in a ring shape.

[0042] The cuff inflation catheter 9 extends from the outer tube 2 through the wall of the catheter body to form a thin catheter that connects to the elastic compressible inflatable cuff connector 16. Air can be injected through the elastic compressible inflatable cuff connector 16 using a syringe. The air is injected into the cuff 8 along the gap between the outer tube 2 and the inner tube 3. Inflating or deflating the cuff 8 with the syringe causes it to expand or collapse. The inflated cuff 8 seals the airway lumen around the segmental bronchus catheter lumen. Then, the guidewire 5 is withdrawn from the segmental bronchus catheter lumen. Inflation is then performed on the target lung segment or subsegmental bronchus through the catheter ventilation and suction port 13, thereby expanding the target lung segment or subsegmental bronchus and exposing the anatomical extent of the ventilated target lung segment or subsegmental bronchus. The occlusion cap 17 corresponds to the catheter ventilation and suction port 13. After the target lung segment or subsegmental bronchus has been expanded using the segmental bronchus catheter, the occlusion cap 17 can be used to seal the catheter ventilation and suction port 13, maintaining the inflated state of the target lung segment or subsegmental bronchus.

[0043] In another embodiment, such as Figure 2 As shown, the cuff inflation catheter 9 extends from the outer tube 2 through the wall of the catheter body to form a thin catheter that connects to the cuff pressure-limiting pre-inflation device (including a sequentially connected elastic compressible inflatable connector 21, a pressure-limiting pre-inflation cuff 15, and an on / off valve 14) for inflating the cuff. The proximal end of the on / off valve 14 is connected to the cuff inflation catheter 9. When using the cuff pressure-limiting pre-inflation device, air can be injected directly into the storage cuff 15 in advance through the elastic compressible inflatable connector 21 using a syringe to inflate it. The main function of the storage cuff 15 is pressure-limiting pre-inflation and storage of gas. Its pressure and capacity for pressure-limiting pre-inflation and storage are twice that of the cuff 8. When the on / off valve 14 is open, the pre-inflation gas in the storage cuff 15 will quickly reach equilibrium with the cuff 8, and the pressure and capacity will be equivalent to the cuff 8 at the front end of the segmental bronchus catheter, thereby achieving convenient operation and rapid pre-inflation of the cuff 8. When the tip of the segmental bronchus catheter reaches the target segment or subsegmental bronchus, the opening and closing valve 14 is opened. The air in the storage cuff 15 will be propelled by the restorative force (contraction force) of the storage cuff 15 through the cuff inflation catheter 9. Utilizing the principle of pressure balance, the air flows into the cuff 8 along the pressure difference, causing it to inflate. The inflated cuff 8 then seals the airway around the segmental bronchus catheter lumen.

[0044] The storage airbag 15 can be used as an indicator airbag. The storage airbag 15 is connected to the cuff 8 through the on / off valve 14 and the cuff inflation conduit 9, so it can indirectly indicate the inflation status of the cuff 8.

[0045] The cuff 8 is 5-10 mm in length and becomes spherical after inflation, with a radius of 2-10 mm. This design allows the cuff 8 to completely block the segmental bronchus after inflation, facilitating segmental bronchial occlusion. After the segmental bronchial catheter reaches the predetermined position, the guidewire 5 is withdrawn from the lumen of the segmental bronchial catheter. Inflation is then performed on the target segment or subsegmental bronchus through the catheter ventilation and suction interface 13, thereby inflating the target segment or subsegmental bronchus and exposing the anatomical extent of the ventilated target segment or subsegmental bronchus.

[0046] The catheter body 1 is cylindrical, with an outer diameter of 1.5–2.8 mm and an inner diameter of 1.5–2.5 mm, to facilitate insertion into the segmental or subsegmental bronchus of the patient through the operating channel of a fiberoptic bronchoscope. Specific specifications include: an outer diameter of 1.8 mm and an inner diameter of 1.5 mm, suitable for use with a fiberoptic bronchoscope with an operating channel diameter of 2 mm; and an outer diameter of 2.8 mm and an inner diameter of 2.5 mm, suitable for use with a fiberoptic bronchoscope with an operating channel diameter of 3 mm.

[0047] The guide end 4 can be formed by extending the inner tube 3 of the catheter body, or it can be made separately and fixedly connected to the inner tube 3.

[0048] In one embodiment, such as Figures 4-5 As shown, the pulmonary segmental bronchus occlusion catheter also includes a guidewire 5, a Y-type adapter 6, and a fixing nut 7 with a through hole. After the fixing nut 7 is connected to the Y-type adapter 6, it can lock the guidewire 5 that passes through both.

[0049] In one embodiment, the guidewire 5 possesses a certain degree of toughness and elasticity in the lateral direction to allow it to recover after bending. For example, it can be an elastic steel wire, which can elastically return to its original shape after bending. This manufacturing process is simple and the materials are inexpensive and readily available. The guidewire 5 can also be composed of a metal strip and a metal wire spirally wrapped around the metal strip. This allows the guidewire 5 to form an elastic structure with a certain strength in the axial direction, facilitating the axial force to guide and propel the catheter forward. In actual operation, the guidewire 5 facilitates the forward movement of the guide end 4, allowing the catheter to advance within the bronchoscope's operating channel and airway tissues such as the lung segments. The two ends of the metal wire are smooth, for example, hemispherical, which helps avoid scratching the operator and facilitates smoother insertion of the guidewire into the lung segment bronchial catheter. The hemispherical tip helps avoid damage to the mucosal tissue of the bronchial branch airways.

[0050] One end 61 of the straight cavity of the Y-type adapter 6 can be sealed to the venting and suction interface 13 of the conduit. The other end 62 of the straight cavity is composed of a hollow tapered tube 63 and a hollow threaded column tube 64. An elastic fastener 65 with a through hole is provided in the tapered tube 63. A gasket 66 is provided inside the threaded column tube 64 and an external thread is provided on its outer surface. The diameter of the through hole of the elastic fastener 65 is slightly larger than the diameter of the guide wire 5. The inner surface of one end of the fixing nut 7 is provided with an internal thread that is compatible with the external thread of the threaded column tube 64. Several anti-slip strips 71 are provided on the outer surface of the fixing nut 7. A fixing post 72 is provided inside the fixing nut 7 to press the gasket 66.

[0051] like Figure 6 As shown, after the guide wire is passed through the fixing nut 7, Y-type adapter 6, conduit ventilation and suction interface 13, inner tube 3, and guide end 4 to the predetermined position, the fixing nut 7 is tightened onto the tail end 62 of the straight cavity of the Y-type adapter 6. Figure 7 As shown, the guide wire 5 extends slightly beyond the guide end 4 at this point, and the guide wire can then be tightened to fix it. When tightening, on the one hand, the fixing post 72 of the fixing nut will press against the washer 66 and the elastic fastener 66; on the other hand, the fixing nut will press the tail end 62 of the straight cavity inward, causing the elastic fastener 66 to contract and thus tighten the guide wire 5.

[0052] In one embodiment, for ease of connection and manufacturing, the catheter ventilation and suction interface 13 is a Luer male connector with a snap-fit ​​connector 17, one end 61 of the straight cavity of the Y-type adapter 6 is a Luer female connector, and the other end of the fixing nut 7 is a Luer female connector. This allows for the continued connection of Luer connectors to the fixing nut 7 for easy connection to other external devices. The snap-fit ​​connector 17 can be pressed onto the catheter ventilation and suction interface 13 to prevent air loss from the lungs. Preferably, the oblique cavity of the Y-type adapter is a Luer female connector.

[0053] The surface of the guide wire 5 can be coated with polytetrafluoroethylene, which has advantages such as corrosion resistance.

[0054] Before use, the segmental bronchial catheter of the present invention can be fully coated with a lubricant (paraffin oil, lidocaine gel or medical water-soluble gel, etc.) on the entire surface of the cuff. Insufficient lubrication will cause friction between the cuff and the inner wall of the bronchoscope operating channel, resulting in damage to the cuff.

[0055] The segmental bronchus catheter of the present invention can be used for pulmonary airway management, wherein the airway includes, but is not limited to, the segmental bronchus, subsegmental bronchus, and bronchioles mentioned above, and also includes small bronchioles.

[0056] The bronchial segmental catheter combined with a fiberoptic bronchoscope of this invention enters the segmental bronchus of the lung and the next lower level of lung segment, such as segmental, subsegmental, or small bronchioles and bronchioles. It can be used for isolated lung segmental controlled obstruction or ventilation during thoracic surgeries such as lung tumor surgery. It is especially needed for precise minimally invasive surgery of thoracoscopic anatomical partial lobectomy (segmental / subsegmental / combined subsegmental) resection under 3D reconstruction / 3D printed model navigation. During the operation, the target lung segment bronchus can be selectively blocked or opened, allowing surgeons to accurately identify the anatomical structure of the target lung segment, solving the technical problem of identifying functional lung segments during surgery, and thus assisting in the implementation of thoracic anatomical partial lobectomy.

[0057] The pulmonary segmental bronchial tube of the present invention can be used once and has short-term contact with the human body during surgery, with the expected cumulative contact time being less than 24 hours.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A segmental bronchial catheter, characterized in that, The segmental bronchial catheter includes: The catheter body (1) includes an outer tube (2), an inner tube (3) and a guide end (4) formed by extending the inner tube (3). The length of the outer tube (2) at the catheter head (11) is less than the length of the inner tube (3) at the catheter head (11). The cuff (8) is arranged in a ring on the outer surface of the catheter head (11); one end of the cuff (8) near the tail side is arranged in a ring on the outer tube (2) of the catheter head, and the other end near the head side is arranged in a ring on the inner tube (3) of the catheter head; the cuff (8) is inflated and wraps around the inner tube (3) in a ring shape. The cuff inflation conduit (9) has one end connected to the cavity between the outer tube (2) and the inner tube (3), and the other end connected to the inflation port. The inflation port is an elastic compression type inflatable airbag connector (16) and / or a cuff pressure limiting pre-inflation device, used to inflate the cuff (8). The catheter ventilation and suction port (13) is fixedly connected to the inner tube (3), and the catheter ventilation and suction port (13) is connected to the inner cavity of the guide end (4) through the inner cavity of the inner tube (3); It also includes a guide wire (5), a Y-type adapter (6) and a fixing nut (7) with a through hole, which can lock the guide wire (5) passing through both when connected to the Y-type adapter (6). The other end (62) of the straight cavity of the Y-type adapter (6) is composed of a hollow tapered tube (63) and a hollow threaded column tube (64). The tapered tube (63) is provided with an elastic fastener (65) with a through hole. The outer surface of the threaded column tube (64) is provided with an external thread. The inner surface of one end of the fixing nut (7) is provided with an internal thread that is compatible with the external thread of the threaded column tube (64). The fixing nut (7) is provided with a fixing column (72) inside.

2. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The pressure-limiting pre-inflating device includes a spring-loaded compressible inflatable connector (21), a pressure-limiting pre-inflating airbag (15), and an on / off valve (14) connected in sequence.

3. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The length of the sheath (8) is 5~10mm, and the sheath expands into a spherical shape with a radius of 2~10mm.

4. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The guide end (4) is a hollow column or conical column with a length of less than 5 mm, and the outer side of the guide end (4) has a side hole that communicates with the inner cavity of the guide end (4).

5. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The catheter body (1) is cylindrical, the outer diameter of the outer tube (2) is 1.5~2.8 mm, and the inner diameter of the inner tube (3) is 1.5~2.5 mm.

6. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, A gasket (66) is provided inside the threaded tube (64).

7. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, One end (61) of the straight cavity of the Y-type adapter (6) can be sealed to the ventilation and suction interface (13) of the catheter, and the diameter of the through hole of the elastic solid (65) is slightly larger than the diameter of the guide wire (5).

8. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The outer surface of the fixing nut (7) is provided with several anti-slip strips (71).

9. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The catheter ventilation and suction interface (13) is a Luer male connector with a snap-fit ​​connector (17), one end (61) of the straight cavity of the Y-type conversion connector (6) is a Luer female connector, and the other end of the fixing nut (7) is a Luer female connector.

10. The pulmonary segmental bronchial catheter according to claim 1, characterized in that, The guide wire (5) is an elastic steel wire, or is composed of a metal strip and a metal wire spirally wrapped around the metal strip, the surface of which is coated with polytetrafluoroethylene.

11. The pulmonary segmental bronchial catheter according to any one of claims 1-10, characterized in that, The segmental bronchial catheter is used for airway management, and the airway includes, but is not limited to, lung segments, lung subsegments, and small bronchi.

Images