A set of auxiliary instruments for non-aerated transaxillary endoscopic head and neck surgery

Abstract

The present application relates to the technical field of medical equipment, and specifically provides a set of auxiliary instruments for head and neck surgery through axillary cavity without inflation, which comprises a retractor assembly and a pressure rod assembly. The retractor assembly is provided with a retractor plate, and a lengthwise channel is formed on the side of the retractor plate facing the operation space, which is used to provide a space for the operation instruments to avoid being hindered by the muscle groups when the tissue is retracted. The pressure rod assembly comprises a pressing plate and a connecting rod, and the connecting rod is provided with a negative pressure suction passage. The connecting rod can be attached to the retractor plate and move along the channel. The set of auxiliary instruments cooperates with the retractor and the pressure rod: the retractor assembly abandons the traditional negative pressure suction tube, and the channel provides a special space for the endoscope and the instruments to avoid being hindered by the muscle groups when they are inserted and moved; the pressure rod pushes and blocks the tissue, and integrates the suction function to remove smoke and waste liquid without occupying the channel. The two together establish an operation space in the small incision, which is smooth to insert and free to adjust the angle of view, solves the problem of instrument congestion and visual interference, and improves the smoothness and safety of the surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically providing a non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit. Background Technology

[0002] With the deepening of minimally invasive surgical concepts and the increasing aesthetic demands of patients, head and neck laparoscopic surgery techniques have undergone rapid development. To avoid leaving obvious surgical scars on the neck, scholars at home and abroad have successively developed a variety of concealed incision approaches, mainly including: the axillary approach, the subclavian approach, the submental approach, and the postauricular approach. All of these approaches utilize natural skin folds or hair-covered areas (such as the armpit, subclavian fossa, submental skin folds, and postauricular sulcus) to design small incisions, reaching the target surgical location in the anterior neck region through subcutaneous tunnels or fascial spaces. Postoperative scars are inconspicuous, resulting in significant cosmetic effects, and are particularly suitable for surgeries such as thyroid, parathyroid, and neck lymph node dissection.

[0003] However, regardless of the concealed incision approach used (via the axilla, subclavian, submental, or postauricular), non-pneumatic laparoscope-guided neck surgery has long faced the technical challenge of severely limited operating space in practice. The head and neck anatomy is complex, with densely packed vital tissues (recurrent laryngeal nerve, parathyroid glands, common carotid artery, trachea, esophagus, etc.), demanding a much higher level of clarity and stability in surgical field exposure compared to abdominal or thoracic laparoscopic surgery. Furthermore, all of these approaches require access to the anterior neck region via a narrow skin incision (typically 2-5 cm) and a relatively long subcutaneous tunnel (approximately 5-15 cm in length depending on the approach), creating a typical "long tunnel, narrow entrance" geometric constraint. Within this extremely confined space, multiple instruments such as retractors, laparoscopes, dissecting forceps, and ultrasonic scalpels must enter simultaneously or alternately, resulting in severe crowding and interference—a problem that has remained fundamentally unresolved since the technology's inception.

[0004] In existing technologies, some improvements have been attempted to address the aforementioned problems. For example, Chinese patent CN218684535U discloses a retractor device specifically for non-inflatable endoscopic breast surgery via the axillary approach. The retractor is responsible for pulling the incision to form a tunnel-like operating space, while a double-lumen tube is fixedly attached to the lower surface of the hook plate, simultaneously achieving negative pressure suction and intraoperative lighting functions, reducing the insertion of independent instruments, and saving operating space to a certain extent. However, this device is specifically designed for endoscopic breast surgery via the axillary approach. The axillary approach to breast surgery is characterized by a relatively short subcutaneous tunnel (usually 5-8 cm) and a relatively wide operating space, belonging to the surgical scenario of "short tunnel, wide space". In such scenarios, fixing the double-lumen tube to the lower surface of the retractor plate, with the outer wall of the tube protruding from the plane of the retractor plate, can still achieve suction and lighting functions relatively without interference. However, for non-pneumatic laparoscopic surgery of the head and neck via concealed incisions (through the armpit, subclavian, submental, or postauricular incisions), the surgical scenario is fundamentally different—the subcutaneous tunnel in the head and neck is longer (usually 10-15 cm), and the operating space is narrower, forming a typical "long tunnel, narrow entrance" geometric constraint. In such an extremely restricted space, the external hanging structure in existing patents, which attaches the tube to the lower surface of the hook plate, will cause continuous spatial interference to the laparoscopic lens that is adjusted and moved below the hook plate. Because the subcutaneous tunnel in the head and neck is longer and narrower, the protruding part of the external tube forces the lens to be inserted subcutaneously only close to the edge of the hook, and the range of angle that can be deflected and adjusted is small, which is not conducive to observation, especially when it is necessary to accurately identify key structures such as the recurrent laryngeal nerve and parathyroid glands. Even more challenging is that after the retractor pulls open the anterior neck muscles, the pulled tissue does not form a smooth, even tunnel wall. Due to the inherent uneven tension of the anterior neck muscles (such as the sternocleidomastoid and band muscles) and fascia, the pulled tissue is prone to sagging, unevenness, or even the formation of valve-like structures. These irregular tissue protrusions can directly obstruct the insertion path of the laparoscopic lens, causing difficulty in lens insertion and advancement, and even requiring repeated adjustments to the insertion angle to avoid scratching the lens or tissue. Even if the lens manages to pass through, these sagging tissues will continue to interfere with the field of vision during intraoperative observation, forcing the surgeon to constantly adjust the lens angle, depth, or posture to find an effective observation window, severely affecting the smoothness of the surgery. In this extremely confined space with a long tunnel, narrow entrance, and rough tunnel walls, the existing technology of attaching the pipe to the lower surface of the hook plate with an external structure further encroaches on the already limited range of motion of the endoscope rod. The protruding part of the external pipe not only compresses the clearance space of the lens, but also forms multiple obstacles together with the hanging tissue, making it difficult for instruments such as laparoscopic lenses and ultrasonic scalpels to enter the operating space pulled up by the hook.

[0005] Therefore, existing integrated retractor designs cannot be directly applied to surgical scenarios in the head and neck region characterized by long tunnels, narrow entrances, and rough tunnel walls. There is an urgent need in this field for an auxiliary instrument kit for head and neck surgery that can provide a smooth insertion channel and unobstructed observation path for laparoscopic lenses and other working instruments while simultaneously retracting tissue with retractors. Summary of the Invention

[0006] On the one hand, to solve the above problems, this invention provides a non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit, which, while retracting tissue with retractors, provides a smooth insertion channel and an unobstructed observation path for the endoscopic lens and other working instruments. The specific solution is as follows:

[0007] A non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit includes a retractor assembly comprising a retractor plate with a clearance channel along its length on the side facing the operating space. The clearance channel provides clearance space for the operating instrument when the retractor plate retracts tissue, and guides the insertion and movement of the operating instrument. It also includes a pressure rod assembly comprising a pressure plate and a connecting rod with a negative pressure suction passage. The width of the pressure plate is less than or equal to the width of the retractor plate, allowing the pressure rod assembly to conform to the retractor plate and move along the length of the clearance channel. The pressure rod assembly and the retractor assembly together create an operating space within a small incision, facilitating smooth insertion of the endoscopic lens and free adjustment of the observation angle.

[0008] In this design, the hook assembly and the pressure rod assembly work together. The hook plate facing the operating space eliminates the need for the traditional negative pressure suction tube. Furthermore, the designated clearance channel provides dedicated clearance space for the endoscope lens and instruments. The rod-shaped instruments can be smoothly inserted into the working position along this clearance channel, effectively preventing drooping muscles or tissues from obstructing the insertion of endoscope lenses, ultrasonic scalpels, and other rod-shaped instruments into the incision tunnel. It also does not affect the freedom of movement of the instruments after insertion to the target depth. The pressure rod assembly allows for the pressing of drooping muscles or tissues in the hand, reducing their impact on the operating space. The system addresses the obstruction of the surgical target and integrates a negative pressure suction channel, allowing for the removal of smoke and waste fluid without requiring additional channel space. The width of the pressure plate is less than or equal to the width of the hook plate, enabling the pressure rod assembly to conform to the hook plate and move along the clearance channel to the required depth. This pushes tissues or muscle groups obstructing the view in the operating space pulled up by the hook within the incision to one side. Together, the hook and pressure rod create an operating space within the small incision that allows for smooth insertion of the laparoscopic lens and free adjustment of the observation angle, fundamentally solving the problems of instrument congestion and visual interference, and significantly improving the smoothness and safety of the surgery.

[0009] Preferably, the hook assembly further includes a suspension plate and a connecting plate, the suspension plate, the connecting plate and the hook plate being connected sequentially along the length direction, the connecting plate being perpendicular to the suspension plate and the hook plate respectively; the end of the hook plate near the connecting plate is a narrow end, the insertion end of the hook plate away from the connecting plate is a wide end, and the width of the wide end is greater than the width of the narrow end.

[0010] In this design, by setting the end of the hook plate closest to the connecting plate as the narrow end and the insertion end as the wide end, with the width of the wide end being greater than that of the narrow end, a gradually widening structure of "wide inside and narrow outside" is formed. At the incision, it occupies only a small entrance space comparable to that of the narrow end, while providing a wider traction range inside. This achieves an optimized layout of "large internal space and small entrance occupation," effectively alleviating instrument congestion at the small incision entrance and reserving ample parallel operation space for the endoscopic lens and pressure rod assembly.

[0011] Preferably, the wide end is an elliptical plate-like structure, the major axis of the ellipse of the wide end is perpendicular to the length direction of the hook plate, and the length of the minor axis of the ellipse of the wide end is adapted to the opening width of the cut.

[0012] In this design, the wide end is set as an elliptical plate structure, with the major axis of the ellipse perpendicular to the length of the retractor plate and the minor axis of the ellipse adapted to the opening width of the incision. During insertion, the ellipse passes through the incision along the minor axis and enters the body. After entering the body, the retractor is rotated to allow the major axis of the ellipse to expand laterally. Thus, without changing the incision size, a larger lateral traction width is obtained by utilizing the major axis of the ellipse, significantly increasing the internal operating space. The elliptical wide end also eliminates sharp edges, reducing local pressure on the tissue and lowering the risk of damage.

[0013] Because the bottom of the hook plate has a clearance channel, the bending strength of the hook plate may be insufficient when pulling the cut. Therefore, preferably, the clearance channel is an arc-shaped groove formed on the side of the hook plate facing the operating space, and the arc-shaped groove extends through both ends of the hook plate.

[0014] In this design, the arc-shaped groove makes the cross-section of the hook plate arched, which greatly improves the bending stiffness and moment of inertia of the hook plate. It achieves higher structural strength without increasing the plate thickness, ensuring that the hook plate does not deform significantly during traction and guaranteeing the stability of the surgical field.

[0015] On the other hand, the pressure plate of the existing pressure rod is fixedly connected to the connecting rod, and the angle of the pressure plate is not adjustable. However, the shape, position and direction of the tissues being covered during the operation are different. The pressure plate with a fixed angle is difficult to adapt to the changing pressure requirements. The surgeon needs to rotate the entire pressure rod to adjust the direction of pressure, which is inconvenient to operate and easy to interfere with other instruments.

[0016] Therefore, preferably, in the pressure rod assembly, the two ends of the connecting rod are respectively provided with a grip handle and the pressure plate, and the pressure plate is rotatably connected to one end of the connecting rod; the grip handle is provided with an adjusting wheel (one end protruding from the grip handle surface), the connecting rod is provided with a transmission mechanism, and the pressure plate is connected to the adjusting wheel through the transmission mechanism. When the adjusting wheel rotates, it drives the pressure plate to rotate in the plane where the pressure plate is located.

[0017] In this design, the pressure plate is rotatably connected to one end of the connecting rod, and an adjusting wheel is installed at the handle. A transmission mechanism is installed inside the connecting rod, allowing the pressure plate to be driven and connected to the adjusting wheel via the transmission mechanism. The surgeon can precisely control the rotation angle of the pressure plate within its plane by rotating the adjusting wheel with one hand, without having to rotate the entire pressure rod, which greatly improves the convenience and accuracy of intraoperative adjustments. The adjustable-angle pressure plate can adapt to tissue obstruction from different directions, achieving targeted pressure to expose the target area, while maintaining the stability of the connecting rod position and reducing interference with other instruments.

[0018] Preferably, the connecting rod and the grip handle are provided with interconnected sealed cavities, and the transmission mechanism is disposed in the sealed cavity.

[0019] In this design, by setting interconnected sealed cavities in the connecting rod and the grip handle, and completely placing the transmission mechanism within the sealed cavities, the transmission system is airtightly isolated from the external environment. This effectively prevents tissue fluid, blood, or cleaning fluid from entering the transmission mechanism, avoiding corrosion, jamming, or failure of the transmission components. The sealed cavity structure also facilitates overall cleaning and sterilization, reducing the risk of infection and improving the reliability and lifespan of the reusable instruments.

[0020] Preferably, the insertion end of the connecting rod is provided with a notch, the height of the notch is the same as the thickness of the pressure plate, the notch makes the side wall of the connecting rod form an installation plane parallel to the axis of the connecting rod, and the pressure plate fits against the installation plane and is rotatably connected to the installation plane.

[0021] In this design, a notch is created at the insertion end of the connecting rod, with the notch height being the same as the thickness of the pressure plate. This creates an installation plane on the side wall of the connecting rod that is parallel to the axis of the connecting rod. The pressure plate fits against this installation plane and rotates to connect with it, achieving coplanar installation of the pressure plate and the connecting rod. When the pressure plate rotates, it does not exceed the outer contour range of the connecting rod, minimizing the volume occupied at the end of the connecting rod and reducing the risk of interference with surrounding tissues and instruments. At the same time, the installation plane also provides stable support for the rotation of the pressure plate.

[0022] Preferably, the transmission mechanism includes a rotating shaft disposed at the insertion end of the connecting rod, one end of the rotating shaft being rotatably supported inside the connecting rod, and the other end of the rotating shaft extending vertically from the mounting plane and fixedly passing through the pressure plate.

[0023] In this design, a rotating shaft is provided, with one end rotatably supported inside the connecting rod and the other end extending vertically from the mounting plane and fixedly inserted into the pressure plate. This enables the internal transmission mechanism to reliably drive the external pressure plate. The rotating shaft extends vertically from the mounting plane, making the rotation axis of the pressure plate perpendicular to the axis of the connecting rod, which facilitates the free rotation of the pressure plate in the plane. This structure also facilitates the installation of a seal (such as a sealing ring) between the rotating shaft and the connecting rod, ensuring the integrity of the sealed cavity and preventing liquid infiltration.

[0024] Preferably, the transmission mechanism further includes a transmission wheel fixedly sleeved on a shaft segment of the rotating shaft located within the connecting rod; a driven wheel is coaxially arranged with the adjusting wheel, the driven wheel is disposed within the grip handle, and the driven wheel and the adjusting wheel are connected via a transmission pair.

[0025] In this design, a transmission wheel is fixedly mounted on the shaft segment inside the connecting rod, and a driven wheel is coaxially mounted on the adjusting wheel. The driven wheel and the adjusting wheel are connected by a transmission pair, thus constructing a complete transmission chain from the grip handle end to the insertion end of the connecting rod. The coaxial mounting of the adjusting wheel and the driven wheel ensures that the rotation of the adjusting wheel is accurately transmitted to the driven wheel. The transmission pair between the transmission wheel and the driven wheel can be flexibly selected according to the internal space of the connecting rod, achieving efficient and reliable power transmission in slender, curved, or irregular spaces.

[0026] Preferably, both the driven wheel and the adjusting wheel are gears, and a rack is provided in the sealed cavity. The rack is slidably disposed in the sealed cavity along the length direction of the connecting rod, and racks that mesh with the driven wheel and the adjusting wheel are respectively provided at both ends of the rack; or, the transmission wheel has the same diameter as the driven wheel, and the transmission pair includes two sets of taut pull ropes connecting the transmission wheel and the driven wheel, with the ends of the two sets of pull ropes respectively placed on both sides of the radial direction of the transmission wheel and the driven wheel.

[0027] In this design, both the driven wheel and the adjusting wheel are configured as gears, and a rack that slides along the length of the connecting rod is installed in the sealed cavity. Racks that mesh with the driven wheel and adjusting wheel are respectively installed at both ends of the rack, forming a rigid transmission chain of "gear-rack-gear." This achieves precise angular displacement transmission from the adjusting wheel to the driving wheel without slippage or lag. The rack slides along the length of the sealed cavity, making full use of the slender space of the connecting rod, resulting in high transmission accuracy and sensitive response. The rigid rack transmission has no elastic deformation, ensuring good long-term reliability and is unaffected by the bending curvature of the connecting rod, making it particularly suitable for delicate operation scenarios requiring precise control of the pressure plate angle.

[0028] The beneficial effects of this invention are:

[0029] 1. This invention utilizes the coordinated operation of the hook assembly and the pressure rod assembly. The hook plate facing the operating space eliminates the need for the traditional negative pressure suction tube. Furthermore, the designed clearance channel provides dedicated clearance space for the laparoscopic lens and operating instruments. The rod-shaped operating instruments can be smoothly inserted into the working position along the clearance channel, effectively preventing sagging muscle groups or tissues from obstructing the insertion of rod-shaped instruments such as laparoscopic lenses and ultrasonic scalpels into the incision tunnel. It also does not affect the freedom of movement of the operating instruments after they are inserted to the target depth, significantly improving the smoothness and safety of the surgery.

[0030] 2. The pressure rod assembly proposed in this invention can push down drooping muscle groups or tissues in the hand, reducing their obstruction of the surgical target. At the same time, it integrates a negative pressure suction channel, which can remove smoke and waste liquid from the outside without occupying additional channel space. The width of the pressure plate is less than or equal to the width of the hook plate, so that the pressure rod assembly can fit against the hook plate and move along the clearance channel to the required depth. It pushes the tissues or muscle groups that are blocking the field of vision in the operating space pulled up by the hook in the incision to one side. The hook and the pressure rod together create an operating space in the small incision that allows for smooth insertion of the laparoscopic lens and free adjustment of the observation angle, fundamentally solving the problems of instrument congestion and field of vision interference. Attached Figure Description

[0031] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the hook assembly of the present invention;

[0033] Figure 2 This is a schematic diagram of the pressure bar assembly of the present invention;

[0034] Figure 3 This is an exploded view of the pressure plate of the pressure bar assembly of the present invention;

[0035] Figure 4 This is a cross-sectional view of the pressure bar assembly of the present invention;

[0036] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0037] Figure 6 For the present invention Figure 4 Enlarged view of point B in the middle;

[0038] Figure 7 This is a schematic diagram of the transmission of a pressure rod assembly according to the present invention.

[0039] In the above figures, the corresponding reference numerals are as follows:

[0040] 1-Hook assembly, 11-Hook plate, 111-Narrow end, 112-Wide end, 12-Leaving channel, 13-Suspension plate, 14-Connecting plate, 2-Pressure rod assembly, 21-Pressure plate, 211-Locking element, 22-Connecting rod, 221-Negative pressure suction passage, 222-Suction port, 223-Negative pressure connecting pipe, 224-Mounting plane, 225-Rotating shaft, 226-Sealing ring, 227-Drive wheel, 228-Passive wheel, 229-Pin rack, 230-Pull rope, 23-Holding handle, 231-Adjusting wheel, 232-Locking knob, 24-Sealed cavity. Detailed Implementation

[0041] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0042] Example 1:

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit, mainly used for minimally invasive head and neck surgeries via the axillary approach, such as thyroidectomy, neck lymph node dissection, parathyroid surgery, etc.

[0044] The kit includes at least one hook assembly 1 and at least one pressure bar assembly 2.

[0045] The retractor assembly 1 includes a retractor plate 11, a suspension plate 13, and a connecting plate 14. The suspension plate 13, connecting plate 14, and retractor plate 11 are connected sequentially along their length. The connecting plate 14 is perpendicular to both the suspension plate 13 and the retractor plate 11, forming an overall U-shape. The suspension plate 13 connects to an external fixation bracket; the connecting plate 14 serves as a transition section, transmitting the pulling force to the retractor plate 11. The retractor plate 11 has a clearance channel 12 along its length on the side facing the operating space. The clearance channel 12 provides clearance space for the laparoscopic lens and other operating instruments when the retractor plate 11 retracts tissue, and guides the insertion and movement of the operating instruments.

[0046] Furthermore, the end of the hook plate 11 closest to the connecting plate 14 is a narrow end 111, and the insertion end of the hook plate 11 furthest from the connecting plate 14 is a wide end 112. The width of the wide end 112 is greater than the width of the narrow end 111, forming a gradually widening structure that is wider inside and narrower outside. In this embodiment, the wide end 112 is an elliptical plate-like structure, with its major axis perpendicular to the length direction of the hook plate 11, and its minor axis length matching the opening width of the incision. In use, the hook is inserted into the body through the incision along the minor axis of the ellipse, and then rotated to allow the major axis of the ellipse to expand laterally. This results in a greater lateral traction width without changing the incision size, significantly increasing the internal operating space. At the same time, the elliptical wide end 112 eliminates sharp edges, reducing local pressure on the tissue.

[0047] In this embodiment, the clearance channel 12 is an arc-shaped groove formed on the bottom surface of the hook plate 11. The arc-shaped groove extends through both ends of the hook plate 11 and has a U-shaped cross-section. The arc-shaped groove makes the cross-section of the hook plate 11 have an arched structure, which greatly improves the bending stiffness and moment of inertia of the hook plate 11, achieving higher structural strength without increasing the plate thickness, and ensuring that the hook plate 11 does not deform significantly during the pulling process.

[0048] The pressure rod assembly 2 includes a pressure plate 21 and a connecting rod 22. The connecting rod 22 is provided with a negative pressure suction passage 221. In this embodiment, the negative pressure suction passage 221 has a suction port 222 at the insertion end of the connecting rod 22. The other end of the negative pressure suction passage 221 is connected to a negative pressure connecting pipe 223 for connecting to an external negative pressure source. The negative pressure suction passage 221 can be an externally mounted negative pressure hose fixed to the side wall of the connecting rod 22, or it can be an integrated hollow pipe structure formed by the connecting rod 22.

[0049] It should be noted that the width of the pressure plate 21 needs to be less than or equal to the width of the hook plate 11, so that when the pressure rod assembly 2 is inserted into the incision, it can fit against the bottom of the hook plate 11 and move along the length direction of the clearance channel 12. In general specifications, the thickness of the pressure plate 21 of the pressure rod assembly 2 is less than the diameter of the connecting rod 22, so the side of the connecting rod 22 that protrudes more than the pressure plate 21 can be inserted to the target depth through the clearance channel 12. The hook assembly 1 and the pressure rod assembly 2 together create an operating space within the small incision that allows for smooth insertion of the endoscopic lens and free adjustment of the observation angle.

[0050] Example 2:

[0051] This embodiment, based on the above embodiments, provides a pressure rod assembly 2 with an adjustable angle for the pressure plate 21. For example... Figures 2 to 4 As shown, the connecting rod 22 in the pressure rod assembly 2 has a grip handle 23 and a pressure plate 21 at both ends. The pressure plate 21 is rotatably connected to one end of the connecting rod 22. An adjusting wheel 231 is provided at the grip handle 23, one end of which protrudes from the surface of the grip handle 23 for easy finger manipulation. A transmission mechanism is provided inside the connecting rod 22, and the pressure plate 21 is connected to the adjusting wheel 231 through the transmission mechanism. When the adjusting wheel 231 rotates, it drives the pressure plate 21 to rotate in the plane in which the pressure plate 21 is located.

[0052] In this embodiment, the insertion end of the connecting rod 22 is provided with a notch. The height of the notch is the same as the thickness of the pressure plate 21, and the notch forms a mounting plane 224 parallel to the axis of the connecting rod 22 on the side wall of the connecting rod 22. The pressure plate 21 is fitted to the mounting plane 224 and rotatably connected to the mounting plane 224.

[0053] Based on this, such as Figure 4 and Figure 5 As shown, the transmission mechanism includes a rotating shaft 225 disposed at the insertion end of the connecting rod 22. One end of the rotating shaft 225 is rotatably supported inside the connecting rod 22, and the other end of the rotating shaft 225 extends vertically from the mounting plane 224 and is fixedly mounted on the pressure plate 21. A sealing ring 226 (a PTFE rotary sealing ring 226 is used in this embodiment to ensure the sealing performance when the rotating shaft 225 rotates) is fitted onto the end of the rotating shaft 225 extending from the mounting plane 224 to maintain internal sealing. The end of the rotating shaft 225 extending from the mounting plane 224 is a prism, and the pressure plate 21 is provided with a prism hole adapted to the prism. The pressure plate 21 is detachably disposed at the end of the connecting rod 22 by means of a locking member 211.

[0054] More specifically, the transmission mechanism further includes a transmission wheel 227 fixedly sleeved on the shaft segment of the rotating shaft 225 located within the connecting rod 22. A driven wheel 228 is coaxially disposed on the adjusting wheel 231, and the driven wheel 228 is disposed within the grip handle 23. The driven wheel 228 and the transmission wheel 227 are connected via a transmission pair. Furthermore, a locking knob 232 is provided on the grip handle 23, the inner end of which presses against a friction plate. The locking knob 232 is positioned on the side of the grip handle 23, allowing the friction plate to contact the end face of the adjusting wheel 231. When the locking knob 232 is tightened, the friction plate presses against the end face of the adjusting wheel 231, preventing the adjusting wheel 231 from rotating through friction; when the locking knob 232 is loosened, the friction is released, and the adjusting wheel 231 can rotate freely.

[0055] To ensure the cleanliness and reliability of the transmission mechanism, the connecting rod 22 and the grip handle 23 are equipped with interconnected sealed cavities 24, and the transmission mechanism is housed within these sealed cavities 24. The sealed cavities 24 are airtightly isolated from the external environment, effectively preventing tissue fluid, blood, or cleaning fluid from entering the transmission mechanism and avoiding corrosion, jamming, or failure of the transmission components.

[0056] Based on this embodiment, such as Figures 4 to 6 As shown, in one embodiment, the negative pressure suction passage 221 is a hollow tube structure inside the connecting rod 22. This hollow tube is located on one side of the sealed cavity 24, also passing through the grip handle 23, and has an outlet at the end of the grip handle 23. This outlet has a threaded hole (or a quick-connect connector in some other embodiments) and can be detachably connected to a standardized negative pressure connecting pipe 223. It communicates with a negative pressure source through a negative pressure plug on the negative pressure connecting pipe 223. The suction port 222 is located on the stepped wall created by the notch groove and is used to absorb smoke and a small amount of accumulated liquid in the cut.

[0057] Example 3:

[0058] This embodiment, based on Embodiment 2, provides a complete traditional method, such as... Figures 4 to 6 As shown, both the driven wheel 228 and the transmission wheel 227 are gears, while the adjusting wheel 231 is coaxially fixed to the driven wheel 228, and the two rotate synchronously. This transmission pair includes a rack 229 disposed within a sealed cavity 24, the rack 229 being slidably disposed within the sealed cavity 24 along the length direction of the connecting rod 22. One end of the rack 229 is provided with a rack that meshes with the driven wheel 228, and the other end of the rack 229 is provided with a rack that meshes with the transmission wheel 227.

[0059] When the adjusting wheel 231 is rotated, the driven wheel 228, which is coaxially fixed with the adjusting wheel 231, rotates synchronously. The driven wheel 228 drives the rack 229 to translate axially along the connecting rod 22 through gear meshing. The other end of the rack 229 drives the transmission wheel 227 to rotate through gear meshing. The transmission wheel 227 is fixedly sleeved on the rotating shaft 225, thereby driving the rotating shaft 225 to rotate. The rotating shaft 225 ultimately drives the pressure plate 21, which is fixedly inserted thereon, to rotate in the plane where the pressure plate 21 is located.

[0060] This embodiment forms a rigid transmission chain of "gear-rack 229-gear", achieving precise angular displacement transmission without slippage or lag between the adjusting wheel 231 and the transmission wheel 227. The rack 229 slides along the length of the sealed cavity 24, making full use of the slender space of the connecting rod 22, resulting in high transmission accuracy and sensitive response. The rigid rack transmission has no elastic deformation, ensuring good reliability in long-term use, and is unaffected by the bending curvature of the connecting rod 22, making it particularly suitable for delicate operation scenarios requiring precise control of the angle of the pressure plate 21.

[0061] Example 4:

[0062] This embodiment differs from Embodiment 3, providing an alternative transmission method, such as... Figure 7 As shown, the transmission pair includes two sets of pull ropes 230 connecting the transmission wheel 227 and the driven wheel 228. Both sets of pull ropes 230 are taut, and their two ends are respectively connected to both sides of the transmission wheel 227 and the driven wheel 228 in the radial direction. Specifically, one end of one pull rope 230 is fixed to the first side of the driven wheel 228, and the other end is fixed to the first side of the transmission wheel 227; one end of the other pull rope 230 is fixed to the second side of the driven wheel 228, and the other end is fixed to the second side of the transmission wheel 227. The two sets of pull ropes 230 are wound in opposite directions on the wheels.

[0063] When the adjusting wheel 231 drives the driven wheel 228 to rotate, one set of pull ropes 230 is tightened while the other set is loosened, thereby driving the transmission wheel 227 to rotate in the same direction, which in turn drives the pressure plate 21 to rotate via the rotating shaft 225. Both sets of pull ropes 230 remain taut at all times, eliminating transmission gaps and ensuring immediate response to the angle adjustment of the pressure plate 21. The pull ropes 230 can be made of medical-grade stainless steel wire, polymer fiber rope, or shape memory alloy wire. In this embodiment, the pull ropes 230 are preferably made of stainless steel microwires coated with polytetrafluoroethylene to reduce friction and improve corrosion resistance.

[0064] In the above embodiment, the retractor plate 11 is inserted through a small axillary incision, with its top surface abutting against and lifting the anterior neck muscles, making way for the channel 12 to face the operating space. Endoscopic lenses and ultrasonic scalpels, and other rod-shaped instruments, can be freely inserted along the channel 12, effectively avoiding obstruction of instrument insertion by sagging muscles or tissues. Once inserted to the target depth, sagging muscles or tissues can no longer hinder the translation of the instrument. During the procedure, when tissue obscures the target area, the surgeon holds the pressure rod assembly 2 and first adjusts the angle of the pressure plate 21 in the pressure rod assembly 2 so that its length direction is consistent with the length direction of the connecting rod 22. Since the width of the pressure plate 21 is smaller than the width of the retractor plate 11 (the narrowest part of the narrow end 111),... The pressure plate 21 can fit against the bottom surface of the hook plate 11 and push it to the target depth along the clearance channel 12. After adjusting the angle of the pressure plate 21, it can be laterally moved to push the hanging tissue to one side. At the same time, the negative pressure source is turned on, and the smoke and some waste liquid are discharged from the body through the suction port 222, the negative pressure suction passage 221 and the negative pressure connecting pipe 223. The pressure rod assembly 2 can move closely against the hook plate 11 without occupying additional space, thereby realizing the coordinated operation of hook opening, pressure rod pushing, negative pressure suction and lens avoidance.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit, characterized in that, include: A retractor assembly, comprising a retractor plate, wherein the side of the retractor plate facing the operating space is provided with a clearance channel along its length, the clearance channel being used to provide clearance space for the operating instrument when the retractor plate retracts the tissue, and to guide the operating instrument to be inserted and moved; And a pressure rod assembly, the pressure rod assembly including a pressure plate and a connecting rod, the connecting rod being provided with a negative pressure suction passage; The width of the pressure plate is less than or equal to the width of the hook plate, so that the pressure rod assembly can fit against the hook plate and move along the length of the clearance channel. The pressure rod assembly and the hook assembly together create an operating space within the small incision, allowing for smooth insertion of the endoscopic lens and free adjustment of the observation angle.

2. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 1, characterized in that, The hook assembly further includes a suspension plate and a connecting plate, wherein the suspension plate, the connecting plate and the hook plate are connected sequentially along the length direction, and the connecting plate is respectively arranged perpendicular to the suspension plate and the hook plate; the end of the hook plate near the connecting plate is a narrow end, and the insertion end of the hook plate away from the connecting plate is a wide end, wherein the width of the wide end is greater than the width of the narrow end.

3. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 2, characterized in that, The wide end is an elliptical plate-like structure, with the major axis of the ellipse perpendicular to the length direction of the hook plate, and the length of the minor axis of the ellipse is adapted to the opening width of the cut.

4. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 1, characterized in that, The clearance channel is an arc-shaped groove formed on the side of the hook plate facing the operating space, and the arc-shaped groove extends through both ends of the hook plate.

5. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 1, characterized in that, In the pressure rod assembly, a grip handle and a pressure plate are respectively provided at both ends of the connecting rod, and the pressure plate is rotatably connected to one end of the connecting rod; an adjusting wheel is provided at the grip handle, and a transmission mechanism is provided inside the connecting rod. The pressure plate is connected to the adjusting wheel through the transmission mechanism, and when the adjusting wheel rotates, it drives the pressure plate to rotate in the plane where the pressure plate is located.

6. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 5, characterized in that, The connecting rod and the grip handle are provided with interconnected sealed cavities, and the transmission mechanism is disposed in the sealed cavity.

7. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 6, characterized in that, The insertion end of the connecting rod is provided with a notch, the height of which is the same as the thickness of the pressure plate. The notch makes the side wall of the connecting rod form a mounting plane parallel to the axis of the connecting rod. The pressure plate fits against the mounting plane and is rotatably connected to the mounting plane.

8. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 7, characterized in that, The transmission mechanism includes a rotating shaft disposed at the insertion end of the connecting rod. One end of the rotating shaft is rotatably supported inside the connecting rod, and the other end of the rotating shaft extends vertically from the mounting plane and is fixedly inserted into the pressure plate.

9. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 8, characterized in that, The transmission mechanism further includes a transmission wheel fixedly sleeved on the shaft segment of the rotating shaft located inside the connecting rod; the adjusting wheel is coaxially provided with a driven wheel, the driven wheel is disposed inside the grip handle, and the driven wheel and the adjusting wheel are connected by a transmission pair.

10. The non-inflatable transaxillary endoscopic neck surgery auxiliary instrument kit according to claim 9, characterized in that, Both the driven wheel and the transmission wheel are gears. A rack is provided in the sealed cavity. The rack is slidably disposed in the sealed cavity along the length direction of the connecting rod. Both ends of the rack are respectively provided with racks that mesh with the driven wheel and the transmission wheel; or, the transmission wheel and the driven wheel have the same diameter. The transmission pair includes two sets of taut pull ropes connecting the transmission wheel and the driven wheel. The two ends of the two sets of pull ropes are respectively placed on both sides of the radial direction of the transmission wheel and the driven wheel.

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