Auxiliary tool for sinus tract wound detection and debridement

Abstract

The invention relates to the technical field of medical instruments, and provides a sinus tract wound probing and debridement auxiliary tool which comprises a base body, a cylindrical body, a guide drill bit, a debridement structure and a driving assembly, the cylindrical body is rotationally connected with the base body through a driving element, the guide drill bit is detachably arranged on the cylindrical body and provided with a first wound debridement surface, and the first wound debridement surface is provided with a second wound debridement surface; the first wound cleaning surface is arranged in the rotating direction of the guide drill bit, the wound cleaning structure is arranged on the cylindrical body and driven by the driving assembly to move in the radial direction of the cylindrical body, the wound cleaning structure is provided with a second wound cleaning surface, and the second wound cleaning surface is arranged in the rotating direction of the guide drill bit. According to the sinus tract debridement device, the trend and form of the sinus tract can be preliminarily explored, the debridement structure is sent into the sinus tract after the sinus tract path is confirmed, necrotic tissue on the inner wall of the sinus tract is accurately removed, therefore, the debridement efficiency and operation safety are remarkably improved, and the sinus tract debridement device is particularly suitable for clinical diagnosis and treatment of sinus tract wound surfaces.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, specifically to an auxiliary tool for exploring and debridement of sinus tract wounds. Background Technology

[0002] Sinus tract wounds are a special type of wound characterized by an external skin opening, an internal tube-like extension, and a blind end. They are commonly found in various acute and chronic wounds, such as acute soft tissue injuries caused by sharp objects, weapons, and high-pressure liquid impacts, as well as chronic, difficult-to-heal wounds like pressure sores (also known as bedsores), diabetic foot ulcers, and unhealed postoperative wounds. With the accelerating aging of my country's population, the incidence of chronic wounds among elderly patients has increased significantly, and the incidence of sinus tract wounds is also showing a year-on-year increasing trend, making clinical treatment increasingly urgent.

[0003] The presence of sinus tract wounds is often a key factor hindering wound healing. Analysis of wound healing mechanisms reveals two main stages: first, the proliferation of granulation tissue deep within the wound to form a suitable "wound bed"; second, based on this, epithelial cells from the wound periphery migrate towards the center and cover the wound, ultimately achieving epithelialization and wound closure. Therefore, the repair of deep sinus tract tissue is the initiating step in wound healing. However, factors such as residual necrotic tissue, foreign body retention, or chronic inflammation within the sinus tract often lead to prolonged sinus healing, thus hindering the overall wound healing process. Sinus tract wounds not only affect local tissue repair but also significantly prolong the wound healing cycle and increase the risk of infection, making them a key focus and challenge in clinical wound management.

[0004] First, the clinical treatment of sinus tract wounds still faces significant challenges, primarily in terms of diagnostic difficulties and limited debridement techniques. This is especially true for long and narrow sinus tracts, where it is difficult to accurately determine the deep structural characteristics, such as the depth, direction, and presence of fluid accumulation or necrotic tissue, solely based on the surface wound, as described in the instruction manual. Figure 1 The diagram shown illustrates a sinus tract lesion in the foot. Although imaging techniques such as ultrasound, local contrast CT, or MRI can be used to assist in clinical assessment, these methods are mostly qualitative analyses and lack intuitive, visual, and precise exploration results, failing to meet the clinical need for dynamic observation of the internal structure of the sinus tract.

[0005] Secondly, regarding treatment methods, there are currently three main types of commonly used approaches: Surgical incision and debridement is the most direct and effective method. This involves incising along the external opening of the sinus tract to the blind end, exploring the internal condition of the sinus tract, and thoroughly removing infected or necrotic tissue. Primary or elective closure is then chosen based on the wound's condition. However, this method is highly invasive and requires a high level of overall health from the patient, especially elderly patients with multiple underlying diseases, who often cannot tolerate anesthesia or surgery and thus lose the opportunity for surgery. Instrumental curettage is used for sinus tracts of a certain width and regular shape. Clinically, tools such as curettes are often used for manual curettage to remove necrotic tissue. However, due to the lack of visual guidance, the operator can only rely on touch and experience to judge the degree of debridement, leading to strong subjectivity, incomplete debridement, and difficulty in achieving precise treatment. Local irrigation and drainage are used for small, tortuous, or irregular sinus tract wounds. Traditional rigid instruments are difficult to access, and local irrigation is usually the only option to remove fluid or pus. The ability to remove necrotic tissue is weak, requiring reliance on natural tissue shedding later, resulting in a long healing period and unstable efficacy.

[0006] In summary, sinus tract wounds present significant technical challenges in clinical diagnosis and treatment due to their unique anatomical structure. Although endoscopic techniques are widely used in many medical fields and have driven the development of minimally invasive treatments, certain limitations remain in the diagnosis and treatment of sinus tract wounds. On the one hand, the sinus tract structure is long, narrow, and tortuous, making it difficult to adapt conventional endoscopes; on the other hand, the outpatient environment demands high levels of ease of operation, safety, and cost-effectiveness, making it difficult for existing equipment to fully meet practical needs. Therefore, there is an urgent need to develop an auxiliary tool for exploring and debridement of sinus tract wounds to address these issues. Summary of the Invention

[0007] This invention provides an auxiliary tool for exploring and debridement of sinus tract wounds to solve the problems mentioned in the background section. Specific implementation methods are as follows: Tools for exploring and debridement of sinus tract wounds, including a base for doctors to hold; A columnar body with a tubular structure, wherein the columnar body is rotatably connected to the base body via a driving element; A guide drill bit is detachably mounted on a cylindrical body. The guide drill bit has a protruding, curved conical portion and a contact portion that contacts the mucosal surface of the sinus tract. The contact portion has a cutting groove recessed toward the central axis of the guide drill bit. The cutting groove has a first debridement surface protruding from the contact portion. The first debridement surface is located on one side wall of the cutting groove facing the rotation direction of the guide drill bit. A debridement structure is provided on a columnar body and can move radially along the columnar body. The debridement structure has a second debridement surface, which is oriented toward the rotation direction of the guide drill bit. A drive assembly is mounted on the columnar body and hinged to the debridement structure. Under the action of the drive assembly, the debridement structure is driven to move radially along the columnar body, so as to change the moving position of the debridement structure according to the diameter of the sinus tract, thereby increasing or decreasing the working range of the debridement structure.

[0008] As a further aspect of the present invention, the second debridement surface is arc-shaped, and the arc-shaped second debridement surface matches the outer contour shape of the columnar body.

[0009] As a further aspect of the present invention, the second debridement surface includes at least one blade, the blade having a cutting edge, the cutting edge being oriented toward the rotation direction of the guide drill bit.

[0010] As a further aspect of the present invention, the blade includes a first blade and a second blade superimposed on the first blade, with a certain distance between the first blade and the second blade.

[0011] As a further aspect of the present invention, the tangential directions of the first blade and the second blade at the connection point are not parallel.

[0012] As a further embodiment of the present invention, the driving component includes a linkage rod and a hinge component. The hinge component is hinged to the linkage rod and the debridement structure respectively. The relative movement of the linkage rod and the columnar body drives the movement of the hinge component to change the moving position of the debridement structure according to the diameter of the sinus tract.

[0013] As a further embodiment of the present invention, the hinge component includes a hinge seat disposed on the connecting rod, and at least two connecting rods are provided between the hinge seat and the debridement structure, wherein one connecting rod adjacent to the debridement structure is slidably connected to the columnar body.

[0014] As a further embodiment of the present invention, the linkage rod has at least a portion of a region having multiple helical teeth, and the columnar body is provided with a gear corresponding to the helical teeth. The gear meshes with the helical teeth to form a gear pair, and the linkage rod is driven to move relative to the columnar body by rotating the gear.

[0015] As a further aspect of the present invention, the gear is controlled to rotate by a control component, which is movably mounted on the columnar body.

[0016] As a further aspect of the present invention, the control component includes a control rod, and the columnar body is provided with at least one lower gear disk corresponding to the control rod. The control rod is provided with an upper gear disk that cooperates with the lower gear disk. The cooperation between the lower gear disk and the upper gear disk is used to limit the automatic rotation of the control rod.

[0017] Due to the adoption of the above technical solutions, the beneficial technical effects of the present invention are as follows: 1. This invention can insert a debridement structure into the sinus tract and use the debridement structure to scrape away necrotic tissue from the inner wall of the sinus tract. By rotating the debridement structure to scrape away tissue of a certain thickness, necrotic tissue or foreign bodies in the sinus tract can be effectively removed, thereby improving the debridement efficiency. 2. Under the action of the driving component, the present invention drives the debridement structure to move along the radial direction of the columnar body, thereby changing the moving position of the debridement structure according to the diameter of the sinus tract to adapt to the debridement operation of sinus tracts of different diameters, thereby improving the flexibility and practicality of the device. 3. By setting up a visualization unit, this invention can provide high-definition two-dimensional or three-dimensional images of the sinus tract in real time, enabling surgeons to more accurately locate and operate the guide drill and debridement structure, thereby performing wound cleaning operations more precisely. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a sinus tract wound in the foot in the background art of this invention; Figure 2 This is a schematic diagram of the structure of the auxiliary tool for exploring and debridement of sinus tract wounds in a specific embodiment of the present invention; Figure 3 This is a cross-sectional view of the auxiliary tool for exploring and debridement of sinus tract wounds in a specific embodiment of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure of section A; Figure 5 This is a schematic diagram of the guide drill bit in a specific embodiment of the present invention; Figure 6 This is a cross-sectional view of the connection between the guide drill bit and the pipeline in a specific embodiment of the present invention; Figure 7 This is a partial structural schematic diagram of the auxiliary tool for exploring and debridement of sinus tract wounds in a specific embodiment of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure of section B; Figure 9 This is a partial enlarged view of the driving component in a specific embodiment of the present invention; Figure 10 This is a partial cross-sectional view of the auxiliary tool for exploring and debridement of sinus tract wounds in a specific embodiment of the present invention; Figure 11 This is a diagram illustrating the working state of the drive component driving the movement of the debridement structure in a specific embodiment of the present invention. Figure 12 This is a schematic diagram of the structure of multiple blades connected in a specific embodiment of the present invention; Figure 13 This is a flowchart of the visualization unit in a specific embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Visual probe; 200. Control module; 300. Display module. 1. Matrix, 2. Columnar body, 3. Guide drill bit, 4. Debridement structure, 5. Drive assembly, 6. Pipe, 7. Spring, 8. Sealing ring, 9. Motor 11. Installation cavity, 21. Receiving cavity; 22. Guide hole; 23. Connecting end; 24. Connecting shaft; 25. Mounting base; 26. Limiting shaft. 25a. Lower gear plate, 31. Tapered portion; 32. Through hole; 33. Contact portion; 34. Through cavity; 35. Internal connector; 36. External connector; 37. Flexible connection end; 38. Opening. 33a. Cutting groove, 41. First blade; 42. Second blade; 43. Third blade; 44. First hinge seat; 45. Bolt; 46. Positioning block. 41a. Blade, 51. Control wheel; 52. Gear; 53. Linkage rod; 54. Control lever; 55. Second hinge seat; 56. First link; 57. Second link; 58. Sliding seat. 51a. Upper gear plate, 53a. Helical teeth, 61. Limiting groove. Detailed Implementation

[0020] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples: It should be noted that the structures, proportions, sizes, etc. illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0021] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0022] Combination Figures 2 to 13As shown, this invention provides an auxiliary tool for exploring and debridement of sinus tract wounds, including a base 1 for doctors to hold. The base 1 is made of composite material, which has good structural strength. The base 1 has finger grooves to facilitate the placement of the doctor's thumb and forefinger, thereby improving grip stability and maneuverability. A cylindrical body 2 is rotatably connected to the base 1. The cylindrical body 2 has a tubular structure. The cylindrical body 2 is rotatably connected to the base 1 via a driving element, specifically a motor 9. The motor 9 is mounted in the mounting cavity 11 via a motor mount to ensure operational stability. The rotational motion of the motor 9 is transmitted to the cylindrical body 2 via a connecting shaft 24, thereby driving the cylindrical body 2 to rotate. The connecting shaft 24 is axially located at the tail end of the cylindrical body 2 and rotatably connected to the base 1, serving as a transmission component between the motor 9 and the cylindrical body 2, thereby transmitting the rotational torque of the motor 9 to the cylindrical body 2, ensuring that the cylindrical body 2 can move relative to the base 1. The column 2, which directly contacts the sinus tract wound and performs the main function, is made of titanium alloy. Titanium alloy has a low density of about 4.5 g / cm³, making instruments made of titanium alloy lighter and helping to reduce fatigue from prolonged operation.

[0023] In this embodiment, combined with Figure 5 , Figure 6 As shown, the columnar body 2 integrates a guide drill bit 3, a debridement structure 4, and a drive assembly 5. The guide drill bit 3 is detachably mounted on the columnar body 2. A suitable guide drill bit 3 can be selected according to the diameter of the sinus tract. Different specifications of guide drill bits 3 have the same diameter as the columnar body 2, or are smaller or larger than the diameter of the columnar body 2, to guide the columnar body 2 into the sinus tract. Specifically, the guide drill bit 3 includes an inner connector 35, an outer connector 36, and an elastic connecting end 37. The inner connector 35 is located in the outer connector 36 and is at a certain distance from it. The elastic connecting end 37 is located on the outer connector 36 and elastically engages with the connecting end 23 of the columnar body 2. The connecting end 23 is stepped and has a limiting area smaller than the diameter of the elastic connecting end 37. When the guide drill bit 3 is fully engaged with the columnar body 2, the limiting area restricts the elastic connecting end 37 to the columnar body 2 to prevent the guide drill bit 3 from dislodging from the columnar body 2.

[0024] In the above scheme, the external connector 36 is screwed to the connecting end 23, thereby further enhancing the connection stability between the guide drill bit 3 and the columnar body 2. The elastic connecting end 37 is opened in the opening 38, which extends from the end of the guide drill bit 3 toward the front end. When the elastic connecting end 37 is inserted, the limiting area squeezes the elastic connecting end 37, causing the opening 38 to gradually shrink. When the elastic connecting end 37 is fully inserted into the connecting end 23, the opening 38 is released and returns to its original shape, thereby achieving the cooperation between the two. Then, by rotating the guide drill bit 3, the guide drill bit 3 is screwed to the connecting end 23, thereby achieving a detachable connection between the guide drill bit 3 and the columnar body 2.

[0025] In the above scheme, in order to prevent the screw connection from loosening during the rotation of the guide drill bit 3, a sealing ring 8 is provided at the connection between the guide drill bit 3 and the connecting end 23. The sealing ring 8 is made of rubber and is ring-shaped with a rectangular cross-section. The sealing ring 8 can provide radial and axial frictional resistance under compression, thereby enhancing the stability of the connection. By tightening the sealing ring 8, the clamping force between the guide drill bit 3 and the connecting end 23 can be increased, which plays a locking role.

[0026] In this embodiment, to avoid obstruction of the sinus tract by the removed tissue, the device is connected to an external suction device via a conduit 6 to remove the removed tissue. The conduit 6 is arranged on the columnar body 2 and the base 1. A rotary joint is provided at the connection between the base 1 and the conduit 6, which allows the conduit 6 to transport fluid (gas, liquid, tissue fragments, etc.) between the base 1 and the columnar body 2, supports the free rotation of the columnar body 2 without causing the conduit 6 to become entangled, and ensures continuous fluid flow even under dynamic conditions. The rotary joint is prior art and will not be described in detail here. The guide drill bit 3 is connected to the conduit 6. The guide drill bit 3 is provided with a through cavity 34 and a through hole 32 that are sequentially connected to the inner connector 35. Several through holes 32 are provided and are evenly distributed at the edge of the guide drill bit 3. The removed tissue in the sinus tract can be adsorbed into the through cavity 34 through the through holes 32, and then discharged from the sinus tract through the inner connector 35 and the conduit 6. Accordingly, the columnar body 2 forms a receiving cavity 21, and the pipe 6 is arranged in the receiving cavity 21 and the mounting cavity 11, extending to the outside of the base 1. It is connected to an external suction device to achieve the removal of the excised tissue. The front end of the pipe 6 forms a limiting groove 61 with an annular structure. The limiting groove 61 is adapted to the inner connector 35. When the guide drill bit 3 is fully engaged with the columnar body 2, the inner connector 35 is embedded in the limiting groove 61 and compresses the sealing ring 8 to seal the connection between the pipe 6 and the guide drill bit 3.

[0027] In a preferred embodiment, the pipe 6 can also be connected to an external flushing device (such as a saline syringe, an electric flushing pump, etc.). After the guide drill 3 enters the sinus tract, it begins to rotate and clean the wound. During the cleaning process, the external flushing device is activated, and the flushing fluid (such as saline or antibacterial solution) is delivered into the sinus tract through the pipe 6. This can flush away debris and necrotic tissue, lubricate the friction interface between the guide drill 3 and the sinus tract wall, and dilute the blood to maintain a clear field of vision.

[0028] In the above scheme, the guide drill 3 has a raised, curved conical portion 31 and a contact portion 33 that contacts the mucosal surface of the sinus tract. The contact portion 33 has a cutting groove 33a recessed towards the central axis of the guide drill 3. The cutting groove 33a has a first cleaning surface protruding from the contact portion 33, which is located on one side wall of the cutting groove 33a facing the rotation direction of the guide drill 3. The conical portion 31 can be constructed as a conical surface extending downward toward the guideline at a small angle around the elevation line. Its shape helps to reduce puncture resistance and guides the guide drill 3 along the path of the sinus tract. The guide drill 3 and the columnar body 2 are made of the same material.

[0029] The contact portion 33 has a smooth surface and directly contacts the sinus tract mucosa to protect the mucosa, reduce friction damage, and improve surgical safety. The contact portion 33 forms a space for accommodating the removed tissue; this space is a cutting groove 33a, which extends uniformly from the tapered portion 31 to the end of the guide drill 3. The cutting groove 33a has a front sidewall and a rear sidewall facing the rotation direction of the guide drill 3. The rear sidewall connects with the surface of the guide drill 3 to form a first debridement surface. Figure 5 As shown, the first debridement surface can be constructed as a cutting edge, with the posterior sidewall being higher than the anterior sidewall, thus allowing the cutting edge to protrude from the surface of the guide drill 3. When the guide drill 3 rotates in the sinus tract, the first debridement surface is used to remove tissue, which is then collected in the cutting groove 33a. Once a certain amount of tissue has been removed, it will move towards the columnar body 2 and be discharged, preventing accumulation and damage.

[0030] In this embodiment, combined with Figure 2 As shown, the debridement structure 4 is mounted on the columnar body 2 and can move radially along the columnar body 2. The debridement structure 4 has a second debridement surface, which is oriented towards the rotation direction of the guide drill bit 3. The drive assembly 5 is mounted on the columnar body and hinged to the debridement structure 4. Under the action of the drive assembly 5, the debridement structure 4 is driven to move radially along the columnar body 2, so as to change the moving position of the debridement structure 4 according to the diameter of the sinus tract, thereby increasing or decreasing the working range of the debridement structure 4, so that the debridement structure 4 can adapt to sinus tracts of different sizes, thereby ensuring the effectiveness and safety of the debridement operation.

[0031] In the above structure, the second debridement surface is arc-shaped, and this arc shape matches the outer contour of the columnar body 2. The arc shape of the columnar body 2 helps the second debridement surface to fit tightly against the sinus tract wall during rotation, thereby enabling the second debridement surface to maintain good contact with the sinus tract mucosa in sinus tracts of different diameters, thus ensuring that necrotic tissue or foreign bodies can be effectively removed during the debridement process.

[0032] In the above structure, combined Figure 12As shown, the second debridement surface includes at least one blade with a cutting edge 41a, which is oriented towards the rotation direction of the guide drill 3. The cutting edge 41a contacts the sinus tract mucosa, and the columnar body 2 rotates, driving the blade to rotate. The cutting edge 41a effectively cuts the encountered tissue, thereby removing necrotic tissue within the sinus tract and improving the debridement efficiency.

[0033] In the above structure, the blade includes a first blade 41 and a second blade 42 superimposed on the first blade 41, with a certain gap between the first blade 41 and the second blade 42. The first blade 41 and the second blade 42 are connected by bolts 45, and the first blade 41 and the second blade 42 are separated by positioning blocks 46 that cooperate with the bolts 45 to form a gap for the excised tissue to pass through. This gap allows the excised tissue to pass through and prevents the excised tissue from getting stuck between the first blade 41 and the second blade 42. By reasonably designing the size of the gap, the tissue discharge path can be optimized, the time required to stop cleaning the blades during the cleaning process can be reduced, and the working efficiency of the debridement structure 4 can be improved.

[0034] In a preferred embodiment, the blades are provided in multiple forms, including a first blade 41, a second blade 42, and a third blade 43. The first blade 41 serves as the base layer of the debridement structure 4, with its blade edge 41a directly contacting the inner wall of the sinus tract. The second blade 42 is superimposed on the first blade 41, with its blade edge 41a offset from that of the first blade 41. After the first blade 41 completes the initial resection, the second blade 42 further refines the resection, thereby providing additional resection force to ensure more thorough removal of the diseased tissue. At the same time, the spacing between the two blades allows the resected tissue to pass smoothly, avoiding tissue getting stuck between the blades, thus ensuring the efficient operation of the debridement structure 4. The third blade 43 has the same structural arrangement and function as the second blade 42.

[0035] In the above scheme, the tangential directions of the first blade 41 and the second blade 42 at the connection point are not parallel. Specifically, the cutting edge 41a of the second blade 42 is arranged to extend outwards relative to the cutting edge 41a of the first blade 41, forming an asymmetrical cutting angle, thereby enhancing cutting efficiency and preventing the removed tissue from getting stuck between the two blades.

[0036] In a preferred embodiment, the included angle between the first blade 41 and the second blade 42 is 5° to 30°, preferably 10° to 20°, so as to achieve the best tissue separation and discharge effect while ensuring structural strength.

[0037] In a preferred embodiment, combined with Figure 2 , Figure 3 ,and Figure 11As shown, two debridement structures 4 are arranged opposite each other on the outer periphery of the columnar body 2. These two structures 4 are evenly distributed circumferentially along the columnar body 2, meaning they are 180° apart. This symmetrical distribution effectively reduces vibration or shaking caused by eccentricity, especially during high-speed rotation, helping to maintain the stability and maneuverability of the instrument and minimizing its impact on the surgeon's operation. Furthermore, the dual debridement structures 4 allow for simultaneous resection, increasing the area of ​​tissue removed per unit time. This is suitable for sinus tracts with larger diameters or thicker tissue, thereby improving surgical efficiency.

[0038] To achieve the ability to change the operating diameter formed by the two debridement structures 4 according to the sinus tract diameter, and to achieve synchronous movement of the two debridement structures 4, this device is equipped with a drive assembly 5. The drive assembly 5 includes a connecting rod 53 and a hinge. The hinge is hinged to the connecting rod 53 and the debridement structure 4 respectively. The relative movement of the connecting rod 53 and the columnar body 2 drives the hinge to move, thereby changing the moving position of the debridement structure 4 according to the sinus tract diameter. The hinge is hinged to the connecting rod 53 and the debridement structure 4 respectively, forming a movable mechanical linkage structure. When the connecting rod 53 is displaced relative to the columnar body 2 (e.g., pushed forward), it drives the hinge to move. The hinge pushes the debridement structure 4 to move in the radial direction of the columnar body 2. Since the two debridement structures 4 are connected to the same connecting rod 53 through the same hinge, the two debridement structures 4 can achieve synchronous movement under the action of the connecting rod 53. The change in the distance between the two debridement structures 4 constitutes a variable operating diameter, thereby adapting to sinus tracts of different sizes.

[0039] In the above scheme, there are multiple hinge components, each corresponding to one of the two debridement structures 4, and forming a four-bar linkage with the connecting rod 53, thereby ensuring the smooth movement of the debridement structure 4 during the movement process. The hinge component includes a hinge seat provided on the connecting rod 53, and at least two connecting rods are provided between the hinge seat and the debridement structure 4, one of which is adjacent to the debridement structure 4 and is slidably connected to the columnar body 2. The hinged seat includes a second hinged seat 55 disposed on the connecting rod 53 and a first hinged seat 44 disposed on the debridement structure 4. The two connecting rods are a first connecting rod 56 and a second connecting rod 57. The first end of the first connecting rod 56 is hinged to the second hinged seat 55, and the end of the first connecting rod 56 is hinged to the second connecting rod 57. The second connecting rod 57 is hinged to the first hinged seat 44, thereby forming a movable mechanical linkage structure. The columnar body 2 has a guide hole 22 corresponding to the second connecting rod 57. The second connecting rod 57 is slidably disposed on the guide hole 22. The hinge component moves under the action of the connecting rod 53 to drive the debridement structure 4 to move outward or inward along the radial direction of the columnar body 2, thereby adjusting the appropriate diameter according to the diameter of the sinus tract.

[0040] In a preferred embodiment, combined with Figure 4As shown, the second connecting rod 57 is provided with a sliding seat 58, which is slidably disposed in the receiving cavity 21. A spring 7 is connected between the sliding seat 58 and the inner wall of the receiving cavity 21 to provide elastic support for the second connecting rod 57, so that the debridement structure 4 can be adaptively adjusted according to the change of the sinus tract diameter, so as to ensure good contact and stable operation performance in sinus tracts of different diameters. In specific applications, if the sinus tract diameter is larger than the operating diameter of the current debridement structure 4, the hinge is activated by the linkage rod 53 to drive the sliding seat 58 to slide radially along the columnar body 2, so that the debridement structure 4 expands outward. At this time, the sliding seat 58 compresses the spring 7, so that the debridement structure 4 always maintains good contact with the inner wall of the sinus tract. During the movement of the debridement structure 4, the buffering force provided by the spring 7 can ensure the smooth movement of the debridement structure 4 and avoid instability caused by sudden changes.

[0041] In the above scheme, combined with Figure 7 , Figure 8 and Figure 9 As shown, the linkage 53 has at least a portion of a region with multiple helical teeth 53a. A gear 52 is rotatably mounted on the columnar body 2 corresponding to the helical teeth 53a. The gear 52 meshes with the helical teeth 53a to form a gear pair. Rotating the gear 52 drives the linkage 53 to move relative to the columnar body 2. Utilizing the worm gear transmission principle, the meshing of the helical teeth 53a and the gear 52 forms a gear pair, converting rotational motion into linear motion of the linkage 53, thereby driving the debridement structure 4 to move, and thus achieving displacement control of the debridement structure 4. During operation, the gear 52 rotates and drives the meshing helical teeth 53a to rotate, causing the linkage 53 to displace along its axial direction. The displacement of the linkage 53 is transmitted to the debridement structure 4 through a hinge, causing the debridement structure 4 to move radially along the columnar body 2, thereby adjusting the operating diameter of the debridement structure 4.

[0042] To control the rotation of gear 52, a control component is provided on columnar body 2. Gear 52 is controlled to rotate by the control component, which is movably mounted on columnar body 2. The control component acts directly on gear 52, driving gear 52 to rotate, causing linkage 53 to move relative to columnar body 2, thereby changing the operating diameter of debridement structure 4 to adapt to different operational needs.

[0043] In the above scheme, the control component includes a control rod 54. The columnar body 2 is provided with at least one lower gear disk 25a corresponding to the control rod 54. The control rod 54 is provided with an upper gear disk 51a that cooperates with the lower gear disk 25a. The cooperation between the lower gear disk 25a and the upper gear disk 51a is used to limit the automatic rotation of the control rod 54. A mounting base 25 is provided on the outer wall of the columnar body 2 corresponding to the control rod 54. The mounting base 25 can extend the connection area between the control rod 54 and the columnar body 2, thereby ensuring the operational stability of the control rod 54. The lower gear plate 25a is formed on the mounting base 25. The pressure angles on both sides of each tooth that mates on the upper gear plate 51a and the lower gear plate 25a are different. The pressure angle on one side (locking direction) from the fully open position to the unlocked position is greater than the pressure angle on the other side (release direction). This pressure angle is 70°, and the pressure angle on the other side is 20°. With the axis of the upper gear plate 51a or the lower gear plate 25a as the center, the radial angle between the highest points of each adjacent tooth on the upper gear plate 51a or the lower gear plate 25a is 30°. During clockwise or counterclockwise rotation of the control lever, if it is necessary to maintain the current state of the cleaning structure 4 (such as stopping the adjustment of the operating diameter), the gear 52 is more likely to get stuck on the 70° pressure angle side under load due to the tooth profile pressure angle design of 70° / 20°, thus forming a self-locking effect. Reverse operation (i.e., adjusting direction) is easier because the 20° pressure angle makes disengagement less difficult.

[0044] In the above scheme, the tooth width of gear 52 corresponds to the moving distance of control lever 54. Control lever 54 is equipped with control wheel 51, and lower gear disk 51a is formed on control wheel 51. The operator drives control lever 54 to move via control wheel 51, causing lower gear disk 51a to separate from upper gear disk 51a. Then, gear 52 is rotated to drive the meshing helical teeth 53a to rotate, causing linkage rod 53 to displace along its axial direction. The displacement of linkage rod 53 is transmitted to debridement structure 4 through hinge, causing debridement structure 4 to move radially along columnar body 2, thereby adjusting the operating diameter of debridement structure 4. After debridement structure 4 is adjusted, control wheel 51 drives gear 52 to reset, and lower gear disk 51a and upper gear disk 51a cooperate to form a self-locking state, thereby preventing debridement of debridement structure 4 in the absence of operation.

[0045] In a preferred embodiment, a spring 7 is fitted onto the control lever 54. The two ends of the spring 7 are connected to the gear 52 and the cylindrical body 2, respectively. When the operator releases the control wheel 51, the spring 7's elastic force causes the gear 52 and the control lever 54 to return to their initial meshing position. Furthermore, the spring 7 can continuously apply preload to ensure that the gear 52 and the helical teeth 53a maintain good meshing, preventing disengagement due to vibration or load changes.

[0046] In a preferred embodiment, combined with Figure 11As shown, the columnar body 2 is provided with a limiting shaft 26 at the end of the connecting rod 53. The limiting shaft 26 is coaxially arranged with the connecting rod 53. The connecting rod 53 is slidably disposed in the limiting shaft 26. The limiting shaft 26 serves as a guide to guide the connecting rod 53 to move smoothly along the axial direction, thereby ensuring the smoothness of the movement of the connecting rod 53.

[0047] In this embodiment, the sinus tract wound exploration and debridement aid also includes a visualization unit. This unit can perform preliminary exploration of the sinus tract's direction and morphology, allowing doctors to examine the condition within the sinus tract. This significantly improves the accuracy and efficiency of the surgery, and also enhances the safety and controllability of the operation. The visualization unit includes a visual probe 100, integrated at the front end of the guide drill 3, used to acquire image or video information within the sinus tract. The visual probe 100 uses a high-resolution endoscopic camera, capable of penetrating deep into the sinus tract to acquire real-time image or video information of the surgical area. An optical sensor is located inside the endoscopic camera, responsible for converting the focused light signal into an electrical signal. The optical sensor has high-resolution imaging capabilities, ensuring rich and clear image details. In addition, the visual probe 100 integrates a miniature LED light source, which is positioned around the lens to provide sufficient illumination, ensuring a clear field of view under different lighting conditions.

[0048] The visualization unit also includes a control module 200 and a display module 300. The control module 200 is connected to the visual probe 100 and is responsible for receiving and processing signals from the visual probe 100. The control module 200 performs a series of processing on the acquired images, such as image enhancement and noise reduction. The control module 200 includes a controller responsible for image acquisition, storage, and transmission functions to ensure the integrity and accuracy of image data. The display module 300 is used to display the images or video streams received from the control module 200 for doctors to view. The display module 300 uses a high-definition display screen to provide clear image display, facilitating the observation of fine structures. In addition, the high-definition display screen supports touch operation, allowing doctors to adjust parameters or mark important areas as needed, thereby improving the flexibility and convenience of operation.

[0049] The visualization unit is specifically used in the debridement environment of sinus tract wounds. The visual probe 100 enters the sinus tract and collects images or video information of the surgical area in real time. The control module 200 receives and processes these signals and performs operations such as image enhancement and noise reduction. The processed images are presented to the doctor through the display module 300 to provide clear visual feedback. Based on the image information on the display screen, the doctor can adaptively adjust the operating diameter of the debridement structure 4 according to the diameter of the sinus tract, thereby achieving more precise debridement operations.

[0050] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A tool for exploring and debridement of sinus tract wounds, characterized in that, Includes a base (1) for the doctor to hold; A columnar body (2) with a tubular structure is rotatably connected to a base (1) via a driving element; A guide drill bit (3) is detachably mounted on a columnar body (2). The guide drill bit (3) has a protruding and curved conical portion (31) and a contact portion (33) that contacts the mucosal surface of the sinus tract. The contact portion (33) has a cutting groove (33a) recessed toward the central axis of the guide drill bit (3). The cutting groove (33a) has a first cleaning surface protruding from the contact portion (33). The first cleaning surface is located on one side wall of the cutting groove (33a) facing the rotation direction of the guide drill bit (3). The debridement structure (4) is disposed on the columnar body (2) and can move radially along the columnar body (2). The debridement structure (4) has a second debridement surface, which is arranged facing the rotation direction of the guide drill bit (3). The driving component (5) is mounted on the column (2) and hinged to the debridement structure (4). Under the action of the driving component (5), the debridement structure (4) is driven to move radially along the column (2) so as to change the moving position of the debridement structure (4) according to the diameter of the sinus tract, thereby increasing or decreasing the working range of the debridement structure (4).

2. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 1, characterized in that, The second debridement surface is arc-shaped, and the arc-shaped second debridement surface matches the outer contour shape of the columnar body (2).

3. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 1, characterized in that, The second debridement surface includes at least one blade with a blade edge (41a) oriented toward the rotation direction of the guide drill bit (3).

4. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 3, characterized in that, The blade includes a first blade (41) and a second blade (42) superimposed on the first blade (41), with a certain gap between the first blade (41) and the second blade (42).

5. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 4, characterized in that, The tangents of the first blade (41) and the second blade (42) at the connection point are not parallel.

6. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 1, characterized in that, The drive assembly (5) includes a linkage (53) and a hinge. The hinge is hinged to the linkage (53) and the debridement structure (4) respectively. The hinge moves in conjunction with the relative movement of the linkage (53) and the column (2) to change the moving position of the debridement structure (4) according to the diameter of the sinus tract.

7. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 6, characterized in that, The hinge component includes a hinge seat disposed on the connecting rod (53), and at least two connecting rods are provided between the hinge seat and the debridement structure (4), wherein one connecting rod adjacent to the debridement structure (4) is slidably connected to the column (2).

8. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 6, characterized in that, The linkage (53) has at least a portion of a region with multiple helical teeth (53a). The column (2) is provided with a gear (52) corresponding to the rotation of the helical teeth (53a). The gear (52) meshes with the helical teeth (53a) to form a gear pair. By rotating the gear (52), the linkage (53) is driven to move relative to the column (2).

9. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 8, characterized in that, The gear (52) is controlled to rotate by a control component that is movably mounted on the column (2).

10. The auxiliary tool for exploring and debridement of sinus tract wounds according to claim 9, characterized in that, The control component includes a control lever (54), and the columnar body (2) is provided with at least one lower gear plate (25a) corresponding to the control lever (54). The control lever (54) is provided with an upper gear plate (51a) that cooperates with the lower gear plate (25a). The cooperation between the lower gear plate (25a) and the upper gear plate (51a) is used to limit the automatic rotation of the control lever (54).

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