Auxiliary drag hook for high-suspension low-incision surgery

Abstract

The invention provides an auxiliary drag hook for a high-suspension low-incision surgery. The drag hook comprises a handheld part, an expansion part and a pressing part which are sequentially connected, the expansion part is configured to be of an arc-shaped plate body structure which is gradually widened in the height direction from bottom to top, the expansion part comprises a lower arc end located at the lower end and an upper arc end located at the upper end, the curvature radius of the lower arc end is minimum, and the arc length of the lower arc end is shortest; the curvature radius of the upper arc end is the largest, the arc length of the upper arc end is the longest, the handheld part is connected to the upper arc end and used for being held by an operation operator, the pressing part is connected to the lower arc end and used for pressing tissue below an operation site, and the expanding part is used for expanding an anal tube. The retractor can effectively expose the operation field and is convenient to use.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments, and in particular to a high-hanging low-resection auxiliary retractor. Background Art

[0002] For anorectal diseases such as hemorrhoids, surgical ligation is often used for treatment. During the ligation operation, surgical thread is used to wrap around the hemorrhoids to block their blood supply, causing the hemorrhoids to be deprived of oxygen and necrotize. However, since internal hemorrhoids grow deep, surgical instruments are required to expand the surgical field of view, and existing surgical instruments are inconvenient to use. Summary of the invention

[0003] The present application provides a high-hanging low-resection auxiliary retractor, which can effectively expose the surgical field of view and is easy to use.

[0004] A high-hanging low-resection auxiliary retractor comprises a hand-held portion, an expansion portion and a pressing portion connected in sequence, the expansion portion being configured as an arc-shaped plate structure that gradually widens in the height direction from bottom to top, the expansion portion comprising a lower arc end located at the lower end and an upper arc end located at the upper end, the lower arc end having the smallest curvature radius and the shortest arc length, and the upper arc end having the largest curvature radius and the longest arc length, the hand-held portion being connected to the upper arc end for a surgical operator to hold, the pressing portion being connected to the lower arc end for pressing tissue below the surgical site, and the expansion portion being used to expand the anal canal.

[0005] Optionally, the pressing portion is provided with an upper end face connected to the lower arc end, the upper end face is set to be a circular end face, the lower arc end is aligned with the edge of the upper end face, the radius of curvature of the lower arc end is equal to the radius of the upper end face, the arc length of the lower arc end is not less than 1 / 4 of the circumference of the upper end face and not greater than 1 / 2 of the circumference of the upper end face, the arc length of the upper arc end is not less than 2 / 3 of the circumference of the upper end face and not greater than the circumference of the upper end face.

[0006] Optionally, in the orthographic projection along the center line of the upper end face and in the direction from the upper arc end to the lower arc end, the projection line of the lower arc end is tangent to the projection line of the upper arc end, the point of tangency coincides with the midpoint of the projection line of the lower arc end and also coincides with the midpoint of the projection line of the upper arc end, and on both sides of the point of tangency, the interval between the projection line of the upper arc end and the projection line of the lower arc end gradually increases.

[0007] Optionally, the pressing portion is configured as a shell-shaped structure with a groove on the upper end surface, and a portion of the upper end surface not connected to the lower arc end is an inclined surface, and the inclined surface is inclined toward a side away from the expansion portion.

[0008] Optionally, the high-hanging low-resection auxiliary retractor further includes a dirt collecting component and / or a reflective adjustment component, the dirt collecting component is arranged in the groove, and the reflective adjustment component is arranged on a side surface of the expansion part facing the pressing part.

[0009] Optionally, the dirt collecting assembly includes at least one of a dirt collecting plate, a cutting portion, a guide plate, and a shell arranged in the groove.

[0010] The dirt collecting plate comprises a plurality of first blades and slits for dirt to flow into the groove, the first blades are arranged in a flow path for dirt to flow into the groove through the slits, the cutting portion comprises a plurality of second blades, at least one of the plurality of second blades is provided with a plurality of cutting edges, and / or the cutting edges of at least one of the plurality of second blades are in different orientations from the cutting edges of the remaining second blades,

[0011] The guide plate includes a sewage pipe arranged at the center and a guide surface arranged at the periphery of the sewage pipe, wherein the guide surface is arranged as a revolving surface formed by the fastest curve revolving around an axis, and the extending direction of the axis is consistent with the height direction of the expansion part.

[0012] An isolation part is provided in the shell, and the isolation part is provided with a through hole for dirt to pass through. A first liquid storage space is reserved between the lower side of the isolation part and the shell, and a second liquid storage space is formed on the upper side of the isolation part. The first liquid storage space is connected to the second liquid storage space.

[0013] Optionally, the first blade extends from the edge area to the middle area of ​​the dirt collecting tray and is arranged as a cantilever structure, the end of the first blade located in the edge area is a fixed end, the end located in the middle area is a free end, and the gap is provided on both sides of the first blade.

[0014] Optionally, from the fixed end to the free end, the first blade extends downward from the edge area to the middle area in an oblique straight shape or in an arc shape, the first blade is a tapered structure from the fixed end to the free end, and the free end is provided with a blade; and / or

[0015] The free end is configured to be deformable and vibrate under the gravity of the dirt, and the free end is also provided with a counterweight; and / or

[0016] The contour line of the blade edge of the first blade is set as the fastest curve; and / or

[0017] There are a plurality of first blades, and the plurality of first blades are distributed at intervals along the circumference of the dirt collecting tray, and the interval between two adjacent first blades forms the gap.

[0018] Optionally, the dirt collecting assembly also includes a cutting portion arranged below the dirt collecting plate, the cutting portion includes a plurality of second blades, at least one of the plurality of second blades is provided with a plurality of cutting edges, and / or the cutting edge of at least one of the plurality of second blades is in a different orientation from the cutting edges of the remaining second blades.

[0019] Optionally, the cutting portion further comprises a rotatable shaft portion, the second blade is arranged on the shaft portion, the axis of the shaft portion is perpendicular to the height direction of the expansion portion, and the shaft portion is arranged as a non-powered shaft; and / or

[0020] The second blade is configured to be deformable and vibrate under the weight of the dirt.

[0021] Optionally, a sewage inlet and a sewage outlet are respectively provided at both ends of the sewage pipe, the sewage inlet is used for sewage to flow into the sewage pipe, the sewage outlet is used for sewage to be discharged from the sewage pipe, and the sewage outlet is configured as a strip-shaped flat outlet; and / or

[0022] Along the direction in which the sewage enters the sewage pipe, the sewage pipe is provided with a contraction section, a throat section and a diffusion section which are connected in sequence, the flow area of ​​the contraction section gradually decreases along the sewage flow direction, the flow area of ​​the throat section is the smallest, and the flow area of ​​the diffusion section gradually increases along the sewage flow direction; and / or

[0023] The sewage pipe is made of flexible material.

[0024] Optionally, the dirt collecting assembly further comprises a shell, the dirt collecting plate, the cutting portion and the guide plate are accommodated in the shell, and the shell is detachably connected to the pressing portion in the groove.

[0025] Optionally, a sewage outlet is further provided at the lowest position of the shell, a first sewage outlet channel is provided inside the pressing part, a second sewage outlet channel is provided inside the expansion part, and a third sewage outlet channel is provided inside the hand-held part, and the sewage outlet, the first sewage outlet channel, the second sewage outlet channel, and the third sewage outlet channel are connected in sequence.

[0026] Optionally, the dirt collecting assembly includes the dirt collecting tray, the cutting portion, the guide tray and the shell, the dirt collecting tray, the cutting portion and the guide tray are accommodated in the shell, and the shell is detachably connected to the pressing portion in the groove.

[0027] Optionally, the dirt collecting tray, the cutting portion, and the guide tray are sequentially arranged on the housing from top to bottom; and / or

[0028] The sewage pipe is passed through the through hole, and the communication port between the first liquid storage space and the second liquid storage space is higher than the sewage outlet of the sewage pipe for discharging sewage, and lower than the sewage inlet of the sewage pipe for sewage to flow in.

[0029] The isolation part is arranged below the guide plate, and the sewage pipe is passed through the through hole. A first liquid storage space is reserved between the lower side of the isolation part and the shell, and a second liquid storage space is reserved between the upper side and the guide plate. The first liquid storage space connects the sewage pipe and the second liquid storage space. The connecting port between the first liquid storage space and the second liquid storage space is higher than the sewage outlet of the sewage pipe for discharging sewage, and is lower than the sewage inlet of the sewage pipe for sewage to flow in.

[0030] Optionally, the reflective adjustment component includes a first deformation part and a first reflective part arranged on the first deformation part, the first reflective part is opposite to a side surface of the expansion part facing the pressing part, and the reflection angle of the first reflective part can be adjusted by controlling the deformation of the first deformation part.

[0031] Optionally, the reflective adjustment component also includes a second deformation portion and a second reflective portion arranged on the second deformation portion, the second reflective portion is arranged on one side in the width direction of the first reflective portion, and the second reflective portion can be opened or folded by controlling the deformation of the second deformation portion. In the open state, the second reflective portion is located on one side in the width direction of the first reflective portion and can reflect light, and in the folded state, the second reflective portion does not exceed the edge of the expansion portion in the width direction.

[0032] The present application provides a high-hanging low-incision auxiliary retractor. During the process of using the retractor, the operator can grasp the handhold, and the expansion part of the arc-shaped plate body can be gradually inserted into the anal canal. As the insertion depth increases, the anal canal is gradually stretched open in an arc shape, so that the surgical site can be exposed to the surgical field of view. At the same time, the pressing part can press down the tissue below the surgical site to separate it from the tissue of the surgical site. The retractor can effectively expose the surgical field of view and is more flexible and convenient to operate and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a high-hanging low-resection auxiliary retractor shown in an exemplary embodiment of the present application;

[0034] Figure 2 yes Figure 1 A front view of a high-hanging low-resection auxiliary retractor shown in;

[0035] Figure 3 yes Figure 2 AA section view in;

[0036] Figure 4yes Figure 1 A top view of the high-hanging low-resection auxiliary retractor shown in FIG.

[0037] Figure 5 yes Figure 4 BB section view in;

[0038] Figure 6 is a top view of the retractor with the hand-held portion in a horizontal position;

[0039] Figure 7 is a schematic diagram of a retractor shown in yet another embodiment of the present application;

[0040] Figure 8 yes Figure 7 An exploded view of the retractor shown in FIG.

[0041] Fig. 9 yes Figure 7 A top view of the drag hook shown in FIG.

[0042] Fig.10 yes Fig. 9 CC section view in;

[0043] Fig.11 is a cross-sectional view of a dirt collection assembly;

[0044] Fig.12 is an exploded view of the dirt collection assembly;

[0045] Fig.13 is another cross-sectional view of the sewage collection component, wherein: Fig.13 The section plane in Fig.11 The section planes in are 90° apart;

[0046] Fig.14 is a schematic diagram of a reflective adjustment assembly;

[0047] Fig.15 yes Fig.14 An exploded view of the reflective adjustment assembly shown in FIG.

[0048] Fig.16 is a schematic diagram of the internal structure of the first deformation part and the second deformation part;

[0049] Fig.17 is a top view of a draw hook with a reflective adjustment assembly installed, wherein the second reflective portion is in an open state;

[0050] Fig.18 is another schematic diagram of the reflective adjustment component, wherein the second reflective portion is in a folded state. DETAILED DESCRIPTION

[0051] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0052] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0053] Please refer to Figure 1 , Figure 1 The isometric view of a high-hanging low-resection auxiliary retractor 100 is shown as an exemplary embodiment of the present application.

[0054] The present application provides a high-hanging low-resection auxiliary retractor 100 (hereinafter referred to as the retractor 100), which is exquisitely designed to provide more accurate and convenient operation assistance for surgical operations. The retractor 100 includes a hand-held portion 10, an expansion portion 20 and a pressing portion 30 connected in sequence to form an integrated surgical tool.

[0055] The expansion portion 20 is the core part of the hook 100 and is designed to be a vertical direction from bottom to top ( Figure 1 The expansion portion 20 has an arc-shaped plate structure that gradually widens in the middle (Z direction) and is used to extend into the anal canal and expand the anal canal. This unique arc-shaped design allows the expansion portion 20 to effectively adapt to the natural shape of the anal canal and better match the shape of the anal canal. It will not damage the anal canal when the expansion portion 20 is inserted and pulled out during surgery, and it can also provide a uniform expansion force. The lower end of the expansion portion 20 is the lower arc end 21, which has the smallest radius of curvature and the shortest arc length, which enables it to fit tightly into the narrow part of the anal canal. The upper end of the expansion portion 20 is the upper arc end 22, which has the largest radius of curvature and the longest arc length. This design helps to provide a wider range of support during expansion, increase the surgical field space, and reduce damage to tissues. The width direction of the arc-shaped expansion portion 20 is Figure 1 The X direction in .

[0056] The hand-held portion 10 is connected to the upper arc end 22 of the expansion portion 20 and is located at the uppermost end of the retractor 100, so that the operator can hold it firmly to ensure stability and accuracy during the operation. The hand-held portion 10 can be made of anti-slip material or provided with an anti-slip structure to adapt to the operating room environment and reduce the risk of slipping due to hand sweat or blood.

[0057] The pressing portion 30 is connected to the lower arc end 21 of the expansion portion 20. Its function is to stably press the tissue below the surgical site during surgery to ensure a clear view of the surgical area and accuracy of the operation. The design of the pressing portion 30 needs to take into account the protection of the tissue. Smooth edges and appropriate curvature can be used to minimize the pressure and damage to the surrounding tissue. For example, the pressing portion 30 can be set as a ball-shaped pressing portion 30.

[0058] It should be noted that the terms “upper”, “lower”, “upper end” and “lower end” mentioned here are all in Figure 1 The posture of the middle retractor 100 is used as a reference. In addition, the "arc-shaped plate" mentioned here refers to the arc-shaped plate along the height direction ( Figure 1 The expansion portion 20 is cut by a plane perpendicular to the Z direction, and the resulting cross sections are all arc-shaped cross sections.

[0059] According to the above description, the design of the retractor 100 fully considers the actual needs of surgical operations. Through its exquisite structure and humanized design, it provides surgeons with an efficient and safe surgical auxiliary tool. Its advantages are particularly obvious in delicate operations such as anal canal dilation. For example, when using the retractor 100, the operator can grasp the handheld portion 10 and gradually insert the expansion portion 20 designed as a circular arc plate into the anal canal. As the insertion depth increases, the anal canal is gradually stretched open in an arc shape, so that the surgical site can be exposed to the surgical field of view. At the same time, the pressing portion 30 connected to the lower end of the expansion portion 20 can stably press the tissue below the surgical site to isolate it from the surgical site tissue. The retractor 100 can effectively expose the surgical field of view, and is more flexible and convenient to operate.

[0060] The present application does not limit the specific shape of the handheld portion 10. Figure 1 In the illustrated embodiment, the hand-held portion 10 is configured as a strip-shaped thin plate with a thickness of 2 mm, and the two long sides of the strip-shaped thin plate are respectively configured as wavy curved profiles, wherein in the width direction of the hand-held portion 10, the concave portions are opposite to the concave portions, and the convex portions are opposite to the convex portions, so that the comfort and reliability of the palm grip can be improved, and anti-slip can be achieved. The length and width of the hand-held portion 10 can be selected and set according to the size of the palm. In the present embodiment, the length of the hand-held portion 10 is set to 135±5 mm. For example, it can be 130 mm, 132 mm, 134 mm, 136 mm, 138 mm, 140 mm, but is not limited thereto.

[0061] Please refer to Figure 2 , Figure 2 yes Figure 1 A front view of the high-hanging low-resection auxiliary retractor 100 is shown in FIG.

[0062] In one embodiment, the hand-held portion 10 extends obliquely upward from the upper arc end 22, and the angle α with the hand-held portion 10 is set to an obtuse angle, that is, the hand-held portion 10 is upturned. In this way, a certain space can be formed between the hand-held portion 10 and the expansion portion 20, which provides a greater degree of freedom for the surgical operator and ensures the distance between the hand-held portion 10 and the patient's buttocks during the operation. The doctor can adjust the grip angle according to the needs of the operation, so as to better control the position and strength of the retractor 100.

[0063] In an optional embodiment, the angle α can be set to 100±5°, which is an appropriate angle. If the angle is too large, hand fatigue will increase. The angle α can be set to 95°, 96°, 97°, 98°, 99°, 100°, 101°, 102°, 103°, 104°, 105°, but is not limited thereto.

[0064] Please combine Figure 1 and Figure 3 , Figure 3 for Figure 2 Middle AA section view.

[0065] The design of the pressing part 30 fully considers the coordination and functionality with the expansion part 20. In one embodiment, the pressing part 30 is provided with an upper end face 31 connected to the lower arc end 21. The upper end face 31 is a circular end face, which can ensure a smooth transition and seamless connection with the lower arc end 21. The lower arc end 21 is also aligned with the edge of the upper end face 31, and the curvature radius of the lower arc end 21 is equal to the radius of the upper end face 31. This alignment ensures the structural continuity and consistency of the expansion part 20 and the pressing part 30, so that the entire retractor 100 can work as a whole in a coordinated manner during the surgical operation. In addition, the arc length of the lower arc end 21 is not less than 1 / 4 of the circumference of the upper end face 31, and is not greater than 1 / 2 of the circumference of the upper end face. The selection of this range reflects the careful consideration of the functionality and operation requirements of the operation. On the one hand, it ensures that the expansion part 20 can effectively stretch the tissue during the operation, providing a clear field of view and sufficient operating space for the operation, and also avoids excessive expansion caused by excessive arc length, ensuring the controllability and safety of the retractor 100 during expansion. For example, when the retractor 100 is inserted into the anal canal, the distance H between the two end points of the arc of the lower arc end 21 is small, and the distance W between the line L connecting the two end points and the midpoint C of the arc is small, thereby ensuring that the retractor 100 can effectively avoid the surgical site during the insertion of the anal canal. In addition, since the arc length of the lower arc end 21 is the shortest, the expansion part 20 is a gradually retracted structure from top to bottom, which can avoid damaging the tissue when the retractor 100 is pulled out from the anal canal.

[0066] It should be noted that the circumference of the upper end surface 31 can be determined according to the diameter of the fitting circle when the anal canal is fully expanded. For example, when the diameter D of the fitting circle when the anal canal is fully expanded is 40 mm, the circumference of the upper end surface 31 can be set to (3πD) / 5.

[0067] In an optional embodiment, the arc length of the lower arc end 21 can be set to 1 / 4, 1 / 3, 3 / 8, 2 / 5, 1 / 2 of the circumference of the upper end surface 31, but not limited to this. In a specific embodiment, the distance H between the two end points of the arc of the lower arc end 21 is 23±2mm. For example, the distance H can be 21mm, 22mm, 23mm, 24mm, but not limited to this. The distance W between the line L connecting the two end points of the arc of the lower arc end 21 and the midpoint C of the arc of the lower arc end 21 is 9±1mm. For example, the distance W can be set to 8mm, 9mm, 10mm.

[0068] In one embodiment, the arc length of the upper arc end 22 is not less than 2 / 3 of the circumference of the upper end surface 31, and is not greater than the circumference of the upper end surface 31. The selection of this range ensures that the expansion portion 20 can provide sufficient expansion support during surgery, so that the retractor 100 can effectively open the anal canal, expose the surgical site to the outside, and provide a clear field of view and sufficient operating space for surgical operations. In addition, by limiting the arc length of the upper arc end 22, excessive expansion of surrounding tissues is avoided, thereby avoiding unnecessary damage or compression, which affects the safety of surgery and the patient's postoperative recovery.

[0069] In an optional embodiment, the arc length of the upper arc end 22 can be set to 2 / 3, 3 / 4, 4 / 5, or 1 times the circumference of the upper end surface 31, but is not limited thereto. The arc length of the upper arc end 22 is set relatively long, so that the anal canal can be opened by the upper arc end 22 to form a larger space, which is convenient for ligation operations of other instruments such as ligation forceps.

[0070] In a specific embodiment, the distance S between the two end points of the arc of the upper arc end 22 (see Figure 4 ) is 38±2mm. For example, the distance S can be 36mm, 37mm, 38mm, 39mm, 40mm, but is not limited thereto.

[0071] It should be noted that, in actual application scenarios, the pressing portion 30 and the lower arc end 21 are located below the surgical site, and the upper arc end 22 is located above the surgical site.

[0072] Please refer to Figure 4 , Figure 4 for Figure 1 A top view of the high-hanging low-resection auxiliary retractor 100 is shown in FIG.

[0073] In one embodiment, along the center line O of the upper end surface 31 (see Figure 2 ) and from the upper arc end 22 to the lower arc end 21 ( Figure 1In the orthographic projection of the lower arc end 21 (in the opposite direction of the center Z), the projection line of the lower arc end 21 is tangent to the projection line of the upper arc end 22, and the tangent point A coincides with the midpoint of the projection line of the lower arc end 21 and the midpoint of the projection line of the upper arc end 22. On both sides of the tangent point A, the interval between the projection line of the upper arc end 22 and the projection line of the lower arc end 21 gradually increases. In this scheme, the expansion part 20 is a symmetrical structure, and the symmetry center line passes through the midpoint of the projection line of the lower arc end 21 and the midpoint of the projection line of the upper arc end 22. The design of the above shape enables the expansion part 20 to gradually widen and expand outward from bottom to top, and the gradually increasing interval design enables the expansion part 20 to provide a uniform expansion force. This design also enables the retractor 100 to adapt to a variety of surgical scenarios. Whether it is a surgery requiring a smaller expansion range or a surgery requiring a larger expansion range, good support can be provided by controlling the insertion depth of the retractor 100.

[0074] It should be noted that the “projection line of the lower arc end 21” mentioned here refers to the projection line of the inner arc of the lower arc end 21 on the side close to the center line O. The “projection line of the upper arc end 22” mentioned here refers to the projection line of the inner arc of the upper arc end 22 on the side close to the center line O.

[0075] Please refer to Figure 5 , Figure 5 for Figure 4 BB section view in.

[0076] In one embodiment, the length L of the expansion portion 20 is 1 Set to 65±5mm. For example, the length L 1 The expansion portion 20 may be 60 mm, 61 mm, 62 mm, 63 mm, 64 mm, 65 mm, 66 mm, 67 mm, 68 mm, 69 mm, 70 mm, but is not limited thereto. The expansion portion 20 may be a strip-shaped thin plate of uniform thickness, with a thickness of 1 mm.

[0077] In one embodiment, the lower surface 32 of the pressing part 30 for contacting the tissue below the surgical site can be set as a spherical surface, and the lower surface 32 and the outer surface of the expansion part 20 are smoothly transitioned at the junction. In the process of inserting the retractor 100 into the anal canal, the pressing part 30 will not cause damage to the tissue in the anal canal, and can also reduce the resistance encountered by the pressing part 30 during the insertion process. In one embodiment, the pressing part 30 can be set as a hemispherical solid structure, or the pressing part 30 can be set as a hemispherical shell structure.

[0078] exist Figure 5In the embodiment shown, the pressing part 30 is configured as a shell-shaped structure with a groove 310 formed on the upper end surface 31, which is conducive to achieving lightweight of the retractor 100 and conveniently utilizing the groove 310 to store dirt such as blood and tissue fluid. The inner surface 3100 of the groove 310 is configured as a spherical surface. The pressing part 30 of the shell-shaped structure can be configured to have a uniform wall thickness of 1 mm, but is not limited thereto.

[0079] In one embodiment, the surface of the upper end surface 31 that is not connected to the lower arc end 21 is an inclined surface 311, and the inclined surface 311 is inclined toward the side away from the expansion portion 20. The inclined surface 311 can facilitate dirt to enter the groove 310. In addition, the inner surface 3100 of the groove 310 can also be set as a reflective surface that can reflect light. In this way, the setting of the inclined surface 311 also avoids blocking the reflected light of the inner surface 3100, providing a better field of view for surgery, allowing the operator to observe the surgical area more clearly, and improving the accuracy of the surgery.

[0080] In one embodiment, the angle β of the inclined surface 311 relative to the expansion portion 20 is 103±2°. That is, the angle β ranges from 101° to 105°, and such a setting can balance the functionality of the surgical operation and the comfort of the operator. For example, the angle β can be set to 101°, 102°, 103°, 104°, 105°, but is not limited thereto.

[0081] In one embodiment, Figure 5 As shown, along the height direction of the expansion portion 20 ( Figure 5 The dimension L from the lower end of the pressing portion 30 to the upper end of the expansion portion 20 is 2 The dimension L is 80±5 mm to meet the requirement of the insertion depth of the retractor 100 into the anal canal during surgery. 2 It can be 75mm, 76mm, 77mm, 78mm, 79mm, 80mm, 81mm, 82mm, 83mm, 84mm, 85mm, but is not limited to.

[0082] Please refer to Figure 6 , Figure 6 It is a top view of the retractor 100 when the handle 10 is in a horizontal position.

[0083] In one embodiment, the inner surface 3100 of the groove 310 is configured as a reflective surface that can reflect light, and the reflective surface can form diffuse reflection, thereby increasing the brightness of the surgical site. The reflective surface can be formed by electroplating a metal layer, or by machining and polishing. In addition, the inner surface 23 of the expansion portion 20 facing the pressing portion 30 is configured as a reflective surface that can reflect light, and the reflective surface can reflect light toward the surgical site together with the inner surface 3100 of the groove 310, further increasing the brightness in the surgical field space, and providing convenience for surgical operations. The manner in which the inner surface 23 of the expansion portion 20 forms a reflective surface can refer to the setting of the inner surface 3100 of the groove 310, and will not be repeated here.

[0084] Please refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of a hook 100 according to another embodiment of the present application. Figure 8 for Figure 7 An exploded view of the draw hook 100 is shown in FIG.

[0085] In one embodiment, the retractor 100 further includes a dirt collection component 40 and / or a reflective adjustment component 50. The dirt collection component 40 is disposed in the groove 310, and the space in the groove 310 can be effectively utilized to collect dirt during the operation to prevent it from contaminating the operation area and ensure a clear operation field.

[0086] The reflective adjustment component 50 is disposed on a side surface of the expansion portion 20 facing the pressing portion 30, that is, disposed on the inner surface 23 of the pressing portion 30. The reflective adjustment component 50 may include a reflective plate or a reflective coating, and the reflective adjustment component 50 can be adjusted according to surgical requirements, so as to adjust the reflection direction of light, so as to provide more accurate lighting.

[0087] In the above design, the addition of the dirt collection component 40 and / or the reflective adjustment component 50 makes the retractor 100 not only a mechanical tool, but also a multifunctional surgical auxiliary device. The configuration of these components fully considers the actual needs of the surgical operator, reduces intraoperative interference and / or optimizes the surgical environment, and significantly improves its clinical application value. In this embodiment, the retractor 100 is equipped with the dirt collection component 40 and the reflective adjustment component 50, which realizes the diversification of the functions of the retractor 100 and the convenience of operation.

[0088] In one embodiment, the dirt collection component 40 can be used as an accessory of the retractor 100 and can be selectively configured according to actual needs. For example, the dirt collection component 40 can be fixed in the groove 310 by means of snaps, magnets or threads to ensure its stability and easy disassembly. The dirt collection component 40 can be designed to be disposable or reusable to facilitate postoperative cleaning and disinfection. In addition, the dirt collection components 40 of different capacities can also be designed, and the dirt collection components 40 of different capacities can be provided according to the amount of liquid produced in different surgeries to meet actual needs.

[0089] In one embodiment, the reflective adjustment component 50 can be used as an accessory of the retractor 100 and can be selectively configured according to actual needs. For example, the reflective adjustment component 50 can be quickly installed and removed by means of a sliding track, a hinge or a magnetic connection to meet the needs of different surgeries and ensure that the angle and / or position can be adjusted to ensure that the light can accurately illuminate the target area.

[0090] Of course, it should be noted that the dirt collecting component 40 and / or the reflective adjusting component 50 can also be fixedly connected to the hook 100 and cannot be separated from the hook 100 .

[0091] Please refer to Figures 9 to 12 , Fig. 9 yes Figure 7 FIG. 1 is a top view of the draw hook 100 shown in FIG. Fig.10 yes Fig. 9 CC section view in. Fig.11 It is a cross-sectional view of the dirt collecting assembly 40 . Fig.12 is an exploded view of the dirt collecting assembly 40 .

[0092] In one embodiment, the dirt collecting assembly 40 includes at least one of a dirt collecting tray 41, a cutting portion 42, a guide tray 43, and a housing 44 disposed in the groove 310. In this embodiment, the dirt collecting assembly 40 includes a dirt collecting tray 41, a cutting portion 42, a guide tray 43, and a housing 44. Moreover, the dirt collecting tray 41, the cutting portion 42, and the guide tray 43 are all accommodated in the housing 44, and are sequentially disposed from top to bottom in the housing 44.

[0093] Specifically, the dirt collecting tray 41 is arranged at the mouth of the groove 310, and the dirt collecting tray 41 includes a plurality of first blades 411 and a slit 412 for dirt to flow into the groove 310, and the first blade 411 is arranged in the flow path of the dirt flowing into the groove 310 through the slit 412. In this way, smaller dirt can flow directly into the groove 310 through the slit 412, while larger dirt can be cut or broken by the first blade 411 in the flow path of the groove 310, so as to avoid blocking the slit 412, so that it can smoothly pass through the slit 412 and enter the groove 310. Since the blade of the first blade 411 is relatively sharp, the larger dirt can be cut or broken by its own gravity when flowing through the blade of the first blade 411. In order to facilitate the collection of dirt, the dirt collecting tray 41 can be arranged as a concave structure with high edges around and low in the middle, so that the speed of the dirt flowing into the groove 310 can be increased by the weight of the dirt. The first blade 411 can be provided with saw teeth.

[0094] In one embodiment, the first blade 411 extends from the edge area of ​​the dirt collecting tray 41 to the middle area and is arranged as a cantilever structure, the end of the first blade 411 located in the edge area is a fixed end 4110, the end located in the middle area is a free end 4111, and the gap 412 is arranged on both sides of the first blade 411. In this way, the first blade 411 of the cantilever structure can make the free end 4111 deform or move under the gravity of the dirt to produce displacement, so that the gap 412 can be enlarged to accommodate the passage of dirt of different sizes and shapes, thereby improving the dirt treatment efficiency. In addition, when a heavy object falls to the free end 4111, the free end 4111 is prone to shaking, which is also conducive to cutting and crushing the dirt. It is easy to understand that the longer the cantilever of the first blade 411, the more flexible the free end 4111 is, and the easier it is to deform or shake.

[0095] exist Fig.11 In the illustrated embodiment, the area of ​​the upper surface of the first blade 411 gradually decreases from the fixed end 4110 to the free end 4111, the first blade 411 is in a tapered structure, and the free end 4111 is provided with a blade 4112. In other words, the first blade 411 gradually becomes sharper from the fixed end 4110 to the free end 4111, which can ensure the connection strength at the fixed end 4110 and prevent the first blade 411 from breaking, and can also enable the free end 4111 to have the ability to cut dirt and move and shake flexibly to accelerate the cutting and collection of dirt.

[0096] In one embodiment, from the fixed end 4110 to the free end 4111, the first blade 411 is configured to extend downward from the edge area of ​​the dirt collecting tray 41 to the middle area in an oblique straight shape, that is, the first blade 411 is configured as a straight first blade 411 that is inclined downward. In this embodiment, from the fixed end 4110 to the free end 4111, the first blade 411 is configured to extend downward from the edge area of ​​the dirt collecting tray 41 to the middle area, that is, the first blade 411 is configured as an arc-shaped first blade 411. Both of the above schemes are conducive to collecting dirt to the middle area of ​​the dirt collecting tray 41, thereby achieving the diversion of the dirt, allowing the dirt to pass through the blade of the first blade 411, and achieving sufficient cutting and crushing of the dirt.

[0097] exist Fig.11 In the embodiment shown, the first blade 411 includes a concave arc segment 411a and a convex arc segment 411b connected to each other, wherein the concave arc segment 411a is a concave arc structure, and the convex arc segment 411b is a convex arc structure, thus forming a curved first blade. The end of the concave arc segment 411a away from the convex arc segment 411b is a fixed end 4110, and the end of the convex arc segment 411b away from the concave arc segment 411a is a free end 4111, and the blade 4112 is provided on the convex arc segment 411b.

[0098] In one embodiment, the free end 4111 is configured to be deformable and vibrate under the gravity of dirt. For example, the free end 4111 can be set relatively thin, so that the rigidity of the free end 4111 can be reduced and its elastic deformation ability can be increased accordingly. For another example, the free end 4111 can also be made of a sheet material with a large elastic modulus. The free end 4111 is also provided with a counterweight 4113, and the counterweight 4113 is arranged on the side of the free end 4111 facing away from the blade 4112. That is, the counterweight 4113 is arranged on the side of the convex arc segment 411b facing away from the blade 4112. The counterweight 4113 can increase the weight of the free end 4111. On the one hand, it can make the first blade 411 more stable when cutting or breaking dirt blocks, and reduce the shaking or deviation caused by external forces. On the other hand, when the free end 4111 is subjected to a large external force, such as the impact force caused by dirt blocks falling to the free end 4111, the free end 4111 will shake, and the counterweight 4113 will help to increase the shaking frequency of the free end 4111 to prevent dirt from clogging the gap 412, ensuring that the dirt can flow smoothly into the groove 310, and in the shaking process, it can also more efficiently cut or break the dirt blocks, thereby improving the efficiency of dirt treatment. The counterweight 4113 can be made of high-density materials, such as stainless steel or tungsten alloy, to ensure that sufficient weight is provided in a smaller volume. The counterweight 4113 can be fixed to the free end 4111 by welding, threaded connection or snap fasteners, but is not limited to this.

[0099] In one embodiment, the first blades 411 are provided in plurality, and the plurality of first blades 411 are distributed at intervals along the circumference of the dirt collecting tray 41, including but not limited to being evenly distributed. The interval between two adjacent first blades 411 forms the slit 412. The plurality of first blades 411 and the plurality of slits 412 enable the dirt collecting tray 41 to cut a plurality of dirt blocks at the same time and form a plurality of dirt flow channels, thereby ensuring that the dirt collecting tray 41 has the ability to work continuously and improving the efficiency of dirt treatment.

[0100] In one embodiment, the contour line of the blade 4112 of the first blade 411 is set as a most rapid curve, and the design of the most rapid curve enables the blade 4112 to complete the cutting in the shortest path when cutting dirt, thereby reducing cutting time and cutting resistance. In addition, this design can reduce dirt adhesion during the cutting process, ensuring that the dirt can pass through the gap 412 smoothly.

[0101] Please continue to refer to Figures 10 to 12 The cutting part 42 is arranged below the dirt collecting tray 41, and the cutting part 42 includes a plurality of second blades 421, at least one of the plurality of second blades 421 is provided with a plurality of blade edges, and / or the blade edge of at least one of the plurality of second blades 421 is in a different orientation from the blade edges of the remaining second blades 421. With such an arrangement, the first blade 411 and the second blade 421 below form a two-stage processing system, the first blade 411 above performs preliminary cutting, and the second blade 421 below performs further crushing, ensuring that the dirt is fully processed. In addition, the multi-blade and / or multi-angle design significantly enhances the dirt processing capacity of the cutting part 42.

[0102] In an optional embodiment, each second blade 421 can be configured as a polyhedral structure, and has blades on at least two sides. Alternatively, the blades of different second blades 421 are located in different directions, so that dirt from different directions can be cut more effectively.

[0103] exist Fig.11 In the illustrated embodiment, since the dirt that falls into the dirt collecting tray 41 flows toward the middle area of ​​the dirt collecting tray 41, a plurality of second blades 421 can be concentratedly arranged directly below the middle area of ​​the dirt collecting tray 41, thereby ensuring that most of the dirt can be cut a second time by the second blades 421.

[0104] In one embodiment, the cutting portion 42 further includes a rotatable shaft portion 422, and the second blade 421 is disposed on the shaft portion 422, and the axis of the shaft portion 422 is perpendicular to the height direction of the expansion portion 20. In the design that the shaft portion 422 is rotatable, the second blade 421 can rotate with the shaft portion 422 to achieve a dynamic cutting function. In addition, during the rotary cutting process, dirt can also be thrown out under the action of centrifugal force to prevent dirt from sticking to the second blade 421. Among them, the shaft portion 422 is configured as an unpowered shaft, that is, the shaft portion 422 does not need to be driven by a driving device, and the external force driving the shaft portion 422 to rotate comes from the gravity of the dirt. When the gravity of the dirt acts on the second blade 421, a torque driving the shaft portion 422 to rotate can be generated. The design of the unpowered shaft can simplify the structure, reduce the possibility of mechanical failure, and reduce the manufacturing cost and maintenance difficulty.

[0105] exist Fig.11 In the illustrated embodiment, a plurality of second blades 421 are arranged along the axial direction of the shaft portion 422, and a plurality of rows are provided, and the plurality of rows of second blades 421 are spaced apart along the circumference of the shaft portion 422. In an optional embodiment, each second blade 421 may be made of a thin sheet material, so that the second blade 421 may be deformed when contacting a dirt block, so that the second blade 421 may adaptively cut into the dirt block at a better angle, thereby improving the cutting efficiency. In addition, the second blade 421 is more likely to vibrate when rotating with the shaft portion 422, so that the dirt may be more thoroughly separated from the second blade 421.

[0106] In one embodiment, the second blade 421 is configured to be deformable and vibrate under the gravity of the dirt. For example, the second blade 421 can be set relatively thin, which can reduce the rigidity of the second blade 421 and correspondingly increase its elastic deformation ability. For another example, the second blade 421 can also be made of a sheet material with a large elastic modulus.

[0107] Please continue to refer to Figures 10 to 12, the guide plate 43 is arranged below the cutting part 42, and the guide plate 43 includes a sewage pipe 430 arranged at the center and a guide surface 431 located at the periphery of the sewage pipe 430, and the guide surface 431 can play the role of guiding the sewage, so that the sewage quickly flows into the sewage pipe 430. Among them, the guide surface 431 is set as a revolving surface formed by the fastest curve rotating around an axis, and the extension direction of the axis is consistent with the height direction of the expansion part 20, and the axis is also the center line of the guide plate 43. The sewage pipe 430 is located at the center of the guide plate 43 and is the main channel for sewage to flow to the groove 310. The guide surface 431 is located at the periphery of the sewage pipe 430, and its shape is formed by the fastest curve rotating around an axis. This design can efficiently guide the sewage to flow to the sewage pipe 430 and reduce the residual sewage. In this embodiment, the center of the guide plate 43 is concave, and the guide surface 431 is a concave arc surface.

[0108] Please combine Fig.13 , Fig.13 is another cross-sectional view of the dirt collecting assembly 40, wherein: Fig.13 The section plane in Fig.11 The section planes in are 90° apart.

[0109] In one embodiment, the upper and lower ends of the sewage pipe 430 are respectively provided with a sewage inlet 430a and a sewage outlet 430b, wherein the sewage inlet 430a is for sewage to flow into the sewage pipe 430, and the sewage outlet 430b is for sewage to be discharged from the sewage pipe 430, and the sewage outlet 430b is set as a strip-shaped flat opening. The design of the strip-shaped flat opening can increase the difficulty of reverse backflow of sewage, ensure that sewage can only enter from the sewage inlet 430a and be discharged from the sewage outlet 430b, and realize the one-way flow of sewage in the sewage pipe 430.

[0110] In one embodiment, along the direction of the sewage passing through the sewage pipe 430 ( Fig.13 ), the sewage pipe 430 includes a contraction section 4301, a throat 4302 and a diffusion section 4303 which are connected in sequence, the flow area of ​​the contraction section 4301 gradually decreases along the flow direction of the sewage, the flow area of ​​the throat 4302 is the smallest, and the flow area of ​​the diffusion section 4303 gradually increases along the flow direction of the sewage. In other words, the sewage pipe 430 has a Venturi effect, the velocity of the fluid increases and the pressure decreases when passing through the contraction section 4301, the local negative pressure generated in the throat 4302 can be used to attract and mix the fluid, and the velocity decreases and the pressure recovers when passing through the diffusion section 4303. This design can efficiently guide the flow of the fluid and prevent blockage at the same time.

[0111] In one embodiment, the sewage pipe 430 is made of a flexible material. With such a configuration, the sewage outlet 430b can be deformed under the action of the gravity of the sewage, so that it can be adaptively stretched open by the sewage, thereby avoiding blockage at the sewage outlet 430b. In addition, the design of the flexible material can also make the material at the sewage outlet 430b vibrate under the impact of the sewage, thereby increasing the momentum and making the sewage fall off from the sewage outlet 430b more effectively. In this embodiment, the guide plate 43 is configured as an integrated structure, and the guide plate 43 can be injection molded by a flexible material at one time, and the guide plate 43 includes but is not limited to using silicone material.

[0112] In an optional embodiment, a smooth coating may be provided on the guide surface 431, including but not limited to a Teflon coating, so as to reduce the friction when dirt slides over the guide surface 431 and prevent the dirt from sticking.

[0113] Please refer again Fig.11 In one embodiment, the housing 44 is further provided with an isolating portion 45, and the isolating portion 45 is provided with a through hole 450, through which dirt can pass. The isolating portion 45 has a first liquid storage space 451 reserved between the lower side and the housing 44, and a second liquid storage space 452 formed on the upper side, and the first liquid storage space 451 is connected to the second liquid storage space 452, thereby increasing the liquid storage capacity of the housing 44.

[0114] In this embodiment, the dirt collecting tray 41, the cutting portion 42 and the guide tray 43 are all accommodated in the shell 44, and the shell 44 is detachably connected to the pressing portion 30 in the groove 310. In this solution, the shell 44 integrates the dirt collecting tray 41, the cutting portion 42 and the guide tray 43 in the same space to form a complete modular dirt collecting unit. This design not only simplifies the structure, but also improves the integrity and stability of the components, and is convenient for maintenance and upgrading. The shell 44 is connected to the pressing portion 30 in a detachable manner, which is convenient for installation, disassembly and cleaning. The detachable connection method is not limited, including but not limited to threaded connection, clamping, magnetic connection, etc. Of course, in some other embodiments, the dirt collecting tray 41, the cutting portion 42 and the guide tray 43 can be directly installed in the groove 310, and the installation method can also be detachable, and the shell 44 is not necessary.

[0115] exist Fig.11In the shown embodiment, the isolation portion 45 is located below the guide plate 43, the sewage pipe 430 is passed through the through hole 450, and a first liquid storage space 451 is reserved between the lower side of the isolation portion 45 and the shell 44, and a second liquid storage space 452 is reserved between the upper side and the guide plate 43. The first liquid storage space 451 connects the sewage pipe 430 and the second liquid storage space 452, and the connecting port 453 between the first liquid storage space 451 and the second liquid storage space 452 is higher than the sewage outlet 430b of the sewage pipe 430, and lower than the sewage inlet 430a of the sewage pipe 430. In this solution, the isolation part 45 divides the space in the shell 44 into a first liquid storage space 451 and a second liquid storage space 452. When the waste enters the first liquid storage space 451 from the sewage pipe 430, the first liquid storage space 451 is first used to store the waste. As the waste continues to increase and reaches the connecting port 453, the waste will enter the second liquid storage space 452 from the connecting port 453. This layered design of the first liquid storage space 451 and the second liquid storage space 452 increases the liquid storage space, can effectively separate the liquid and solid components in the waste, and is convenient for subsequent processing. In addition, the position design of the connecting port 453 ensures that the waste can only flow in one direction, prevents the waste from flowing back or being retained, and also reduces the sewage resistance of the sewage pipe 430.

[0116] In one embodiment, please combine Fig.10 and Fig.11 The lowest position of the housing 44 is also provided with a sewage outlet 440, the interior of the pressing part 30 is provided with a first sewage outlet 301, the interior of the expansion part 20 is provided with a second sewage outlet 201, and the interior of the hand-held part 10 is provided with a third sewage outlet 101. The sewage outlet 440, the first sewage outlet 301, the second sewage outlet 201, and the third sewage outlet 101 are connected in sequence. The first sewage outlet 301, the second sewage outlet 201, and the third sewage outlet 101 are respectively provided in the interior of the pressing part 30, the expansion part 20, and the hand-held part 10, which makes the appearance structure of the hook 100 more concise and avoids interference from external pipelines. The sewage outlet 440 is located at the lowest position, which can ensure that the sewage is completely discharged.

[0117] In an optional embodiment, a negative pressure device may be further provided to communicate with the third sewage discharge channel 101, so that the sewage is sucked out by the negative pressure adsorption force. A sealing ring 46 is also sandwiched between the housing 44 and the pressing part 30, and the sealing ring 46 is arranged around the sewage discharge port 440 to seal the gap between the housing 44 and the pressing part 30.

[0118] In this embodiment, Fig.11As shown, the bottom of the housing 44 is provided with a stud 441, and the pressing part 30 is provided with a screw hole, and the stud 441 is screwed into the screw hole to achieve a detachable connection between the housing 44 and the pressing part 30. The sealing ring 46 is sleeved on the stud 441.

[0119] Please refer to Figures 14 to 18 , Fig.14 is a schematic diagram of the reflective adjustment component 50. Fig.15 yes Fig.14 An exploded view of the reflective adjustment assembly 50 is shown in FIG. Fig.16 Schematic diagram of the internal structure of the first deformation part 51 and the second deformation part 53. Fig.17 It is a top view of the draw hook 100 with the reflective adjustment assembly 50 installed, wherein the second reflective portion 54 is in an open state. Fig.18 is another schematic diagram of the reflective adjustment component 50, wherein the second reflective portion 54 is in a folded state.

[0120] In one embodiment, the reflective adjustment component 50 includes a first deformation portion 51 and a first reflective portion 52 provided on the first deformation portion 51. The first reflective portion 52 may be a reflective plate attached to the first deformation portion 51, or a reflective coating applied to the first deformation portion 51. The first reflective portion 52 and the expansion portion 20 are disposed on one side of the surface facing the pressing portion 30 ( Figure 8 The first deformable portion 51 is directly opposite to the inner surface 23 in the drawing, and the first deformable portion 51 is controlled to be deformed, so that the reflection angle of the first reflective portion 52 can be adjusted. In this design, the shape change of the first deformable portion 51 will drive the angle change of the first reflective portion 52, thereby adjusting the direction of the light reflected by the first reflective portion 52. The first reflective portion 52 is mainly used to reflect the light of the main surgical area, illuminate the dark part of the surgical area, and provide a clear main field of vision. The first reflective portion 52 can be connected to the first deformable portion 51 by a buckle 501, but is not limited to this. In addition, a light source can be set in the buckle 501 to illuminate the dark part of the surgical area.

[0121] In one embodiment, Fig.16 As shown, the first deformation portion 51 includes a sealed first flexible bag 510 storing a fluid medium. Applying pressure to the fluid medium in the first flexible bag 510 can cause the first flexible bag 510 to expand and deform, thereby driving the first reflective portion 52 to change its angle.

[0122] In another embodiment, the first deformation portion 51 includes a first flexible bag 510 that can be filled with a fluid medium. The fluid medium can be filled into the first flexible bag 510 through an external device such as an air pump or a syringe, so that the first flexible bag 510 expands and deforms, thereby driving the first light reflecting portion 52 to change its angle. The fluid medium includes but is not limited to air, water, physiological saline, etc. In this embodiment, the former is used.

[0123] The first deformation portion 51 may include a plurality of first flexible bags 510 . By selectively controlling any one or more of the plurality of first flexible bags 510 to deform, the first light reflecting portion 52 may be driven to change to different angles, and the adjustment method is more flexible.

[0124] In one embodiment, the reflective adjustment component 50 also includes a second deformation portion 53 and a second reflective portion 54 provided on the second deformation portion 53. The second reflective portion 54 may be a reflective plate attached to the second deformation portion 53, or a reflective coating applied to the second deformation portion 53. The second reflective portion 54 is provided on one side of the width direction of the first reflective portion 52. The second reflective portion 54 is controlled to deform so as to open or fold the second reflective portion 54. In the open state, the second reflective portion 54 is located on one side of the width direction of the first reflective portion 52, and can reflect light from the side or edge area to provide an auxiliary field of view and ensure comprehensive illumination of the surgical area. Moreover, the second reflective portion 54 can also dilate the anal canal in the open state. The "width direction of the first reflective portion 52" mentioned here is the same as Figure 1 The width direction of the expansion portion 20 shown in FIG. Figure 1 X direction).

[0125] The first reflective portion 52 and the second reflective portion 54 can both be set as reflective plates, and the first reflective portion 52 can be set as an arc-shaped plate structure with the same shape as the expansion portion 20, thereby improving the fit between the first reflective portion 52 and the expansion portion 20 when installed. The second reflective portion 54 can be set on both sides of the first reflective portion 52 in the width direction, for example, the second reflective portion 54 can be symmetrically set on both sides of the first reflective portion 52.

[0126] In one embodiment, Fig.15 As shown, the second reflective portion 54 and the second deformable portion 53 are provided on both sides of the width direction of the first reflective portion 52, and the two second reflective portions 54 are provided as an integrated structure, and the two second reflective portions 54 are connected by an arc portion 55. The first deformable portion 51 and the two second deformable portions 53 are also provided as an integrated structure, and the arc portion 55 is fixedly connected to the back of the first deformable portion 51, and the connection method includes but is not limited to snap-fitting. The second reflective portion 54 is connected to the side of the second deformable portion 53 facing the pressing portion 30, and the connection method includes but is not limited to snap-fitting.

[0127] In one embodiment, Fig.16 As shown, the second deformation portion 53 includes a sealed second flexible capsule 530 storing a fluid medium. Applying pressure to the fluid medium in the second flexible capsule 530 can cause the second flexible capsule 530 to expand and deform, thereby driving the second reflective portion 54 to fold or unfold.

[0128] exist Fig.16 In the illustrated embodiment, the second flexible capsule 530 is bent, and the bending direction is shown by the arrow in the figure. The second flexible capsule 530 stores a fluid medium, and one end of the second flexible capsule 530 is a pressure-applying end for applying pressure to the internal fluid medium. The other end of the second flexible capsule 530 is located at the edge of the width direction of the second deformation portion 53 and is in a closed state. The volume of the fluid medium contained in the second flexible capsule 530 at this edge is the largest. When the second flexible capsule 530 expands and deforms, the deformation of the second flexible capsule 530 at this edge is the largest, and because the second reflective portion 54 is designed as an arc-shaped plate body, the second reflective portion 54 is more likely to deflect inward and switch from an open state to a folded state. Each second deformation portion 53 may include a plurality of second flexible capsules 530, and the plurality of second flexible capsules 530 may be spaced apart in the height direction. At the same time, the expansion and deformation of the second flexible capsule 530 is controlled, and a more uniform force can be provided to the second reflective portion 54, making the folding process smoother.

[0129] In one embodiment, Fig.15 As shown, the reflective adjustment component 50 also includes a joint 56 and a plurality of control parts 57 arranged on the joint 56. The joint 56 is provided with a plurality of connection channels 560. The plurality of connection channels 560 are connected to the first flexible bag 510 and the second flexible bag 530 one by one. The plurality of control parts 57 block each connection channel 560 one by one.

[0130] Each control part 57 may include a push plate 570 and a piston head 572 connected to the push plate 570, wherein the push plate 570 is exposed to the outside for manual pushing, and the upper surface of the push plate 570 may be set as a non-slip surface. The piston heads 572 are installed in each connection channel 560 one by one and seal each connection channel 560. Taking the control of the deformation of the first deformation part 51 as an example, pushing the push plate 570 can simultaneously push the piston head 572, and the movement of the piston head 572 can increase the pressure of the fluid medium in the first flexible bag 510, so that the first flexible bag 510 produces expansion deformation. In the embodiment where the first deformation part 51 includes a plurality of first flexible bags 510, arbitrarily controlling one or more first flexible bags 510 to produce deformation can drive the first reflective part 52 to produce changes in different angles. The same is true for the way to control the deformation of the second deformation part 53, which will not be repeated here.

[0131] In one embodiment, the reflective adjustment assembly 50 further includes a locking portion 561 disposed on the joint 56, and the locking portion 561 is used to cooperate with the push plate 570 controlling the second flexible bag 530 for locking, so that the push plate 570 is locked at this position, so that the second flexible bag 530 is kept in a deformed state, so that the second reflective portion 54 can be kept in a folded state, and when the retractor 100 is pulled out of the anal canal, the second reflective portion 54 will not be opened at will, and thus will not cause tissue damage. The locking portion 561 can be set as a convex portion, and correspondingly, the push plate 570 is provided with a concave portion, and the convex portion and the concave portion cooperate to lock, which has a simple structure and is easy to implement, but is not limited thereto.

[0132] Please combine Fig.17 and Fig.18 , Fig.18 FIG. 5 is a schematic diagram showing that the second light reflecting portion 54 is in a folded state.

[0133] The second reflective portion 54 can be in an open state and a folded state. In the folded state, the second reflective portion 54 does not exceed the edge of the expansion portion 20 in the width direction, thereby avoiding damage to tissues.

[0134] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A high-hanging low-resection auxiliary retractor, characterized in that: The invention comprises a hand-holding part, an expansion part and a pressing part which are connected in sequence, wherein the expansion part is configured as an arc-shaped plate structure which gradually widens in the height direction from bottom to top, and the expansion part comprises a lower arc end located at the lower end and an upper arc end located at the upper end, wherein the curvature radius of the lower arc end is the smallest and the arc length is the shortest, and the curvature radius of the upper arc end is the largest and the arc length is the longest, the hand-holding part is connected to the upper arc end for the surgical operator to hold, the pressing part is connected to the lower arc end for pressing the tissue below the surgical site, and the expansion part is used for expanding the anal canal.

2. The high-hanging low-resection auxiliary retractor according to claim 1, characterized in that: The pressing portion is provided with an upper end face connected to the lower arc end, the upper end face is set to a circular end face, the lower arc end is aligned with the edge of the upper end face, the curvature radius of the lower arc end is equal to the radius of the upper end face, the arc length of the lower arc end is not less than 1 / 4 of the circumference of the upper end face and not greater than 1 / 2 of the circumference of the upper end face, the arc length of the upper arc end is not less than 2 / 3 of the circumference of the upper end face and not greater than the circumference of the upper end face.

3. The high-hanging low-resection auxiliary retractor according to claim 2, characterized in that: In the orthographic projection along the center line of the upper end face and in the direction from the upper arc end to the lower arc end, the projection line of the lower arc end is tangent to the projection line of the upper arc end, the point of tangency coincides with the midpoint of the projection line of the lower arc end and also coincides with the midpoint of the projection line of the upper arc end, and on both sides of the point of tangency, the interval between the projection line of the upper arc end and the projection line of the lower arc end gradually increases.

4. The high-hanging low-resection auxiliary retractor according to claim 2, characterized in that: The pressing portion is configured as a shell-shaped structure with a groove on the upper end surface, and the surface of the upper end surface that is not connected to the lower arc end is an inclined surface, and the inclined surface is inclined toward a side away from the expansion portion.

5. The high-hanging low-resection auxiliary retractor according to claim 4, characterized in that: The high-hanging low-resection auxiliary retractor further includes a dirt collecting component and / or a reflective adjustment component. The dirt collecting component is arranged in the groove, and the reflective adjustment component is arranged on a side surface of the expansion part facing the pressing part.

6. The high-hanging low-resection auxiliary retractor according to claim 5, characterized in that: The dirt collection assembly includes at least one of a dirt collection plate, a cutting portion, a guide plate, and a shell disposed in the groove. The dirt collecting plate comprises a plurality of first blades and slits for dirt to flow into the groove, the first blades are arranged in a flow path for dirt to flow into the groove through the slits, the cutting portion comprises a plurality of second blades, at least one of the plurality of second blades is provided with a plurality of cutting edges, and / or the cutting edges of at least one of the plurality of second blades are in different orientations from the cutting edges of the remaining second blades, The guide plate includes a sewage pipe arranged at the center and a guide surface arranged at the periphery of the sewage pipe, wherein the guide surface is arranged as a revolving surface formed by the fastest curve revolving around an axis, and the extending direction of the axis is consistent with the height direction of the expansion part. An isolation part is provided in the shell, and the isolation part is provided with a through hole for dirt to pass through. A first liquid storage space is reserved between the lower side of the isolation part and the shell, and a second liquid storage space is formed on the upper side of the isolation part. The first liquid storage space is connected to the second liquid storage space.

7. The high-hanging low-resection auxiliary retractor according to claim 6, characterized in that: The first blade extends from the edge area to the middle area of ​​the dirt collecting tray and is arranged as a cantilever structure. The end of the first blade located in the edge area is a fixed end, and the end located in the middle area is a free end. The gaps are arranged on both sides of the first blade.

8. The high-hanging low-resection auxiliary retractor according to claim 7, characterized in that: From the fixed end to the free end, the first blade extends downward from the edge area to the middle area in an oblique straight shape or in an arc shape, the first blade is a tapered structure from the fixed end to the free end, and the free end is provided with a blade; and / or The free end is configured to be deformable and vibrate under the gravity of the dirt, and the free end is also provided with a counterweight; and / or The contour line of the blade edge of the first blade is set as the fastest curve; and / or There are a plurality of first blades, and the plurality of first blades are distributed at intervals along the circumference of the dirt collecting tray, and the interval between two adjacent first blades forms the gap.

9. The high-hanging low-resection auxiliary retractor according to claim 6, characterized in that: The cutting part further comprises a rotatable shaft part, the second blade is arranged on the shaft part, the axis of the shaft part is perpendicular to the height direction of the expansion part, and the shaft part is arranged as a non-powered shaft; and / or The second blade is configured to be deformable and vibrate under the weight of the dirt.

10. The high-hanging low-resection auxiliary retractor according to claim 6, characterized in that: The two ends of the sewage pipe are respectively provided with a sewage inlet and a sewage outlet, the sewage inlet is used for sewage to flow into the sewage pipe, the sewage outlet is used for sewage to be discharged from the sewage pipe, and the sewage outlet is configured as a strip-shaped flat outlet; and / or Along the direction in which the sewage enters the sewage pipe, the sewage pipe is provided with a contraction section, a throat section and a diffusion section which are connected in sequence, the flow area of ​​the contraction section gradually decreases along the sewage flow direction, the flow area of ​​the throat section is the smallest, and the flow area of ​​the diffusion section gradually increases along the sewage flow direction; and / or The sewage pipe is made of flexible material.

11. The high-hanging low-resection auxiliary retractor according to claim 6, characterized in that: The lowest position of the shell is also provided with a sewage outlet, the interior of the pressing part is provided with a first sewage discharge channel, the interior of the expansion part is provided with a second sewage discharge channel, and the interior of the hand-held part is provided with a third sewage discharge channel. The sewage outlet, the first sewage discharge channel, the second sewage discharge channel, and the third sewage discharge channel are connected in sequence.

12. The high-hanging low-resection auxiliary retractor according to claim 6, characterized in that: The dirt collecting assembly comprises the dirt collecting tray, the cutting portion, the guide tray and the shell. The dirt collecting tray, the cutting portion and the guide tray are accommodated in the shell. The shell is detachably connected to the pressing portion in the groove.

13. The high-hanging low-resection auxiliary retractor according to claim 12, characterized in that: The dirt collecting tray, the cutting portion, and the guide tray are arranged in sequence from top to bottom on the housing; and / or The sewage pipe is passed through the through hole, and the communication port between the first liquid storage space and the second liquid storage space is higher than the sewage outlet of the sewage pipe for discharging sewage, and lower than the sewage inlet of the sewage pipe for sewage to flow in; and / or The isolation part is arranged below the guide plate, and the sewage pipe is passed through the through hole. A first liquid storage space is reserved between the lower side of the isolation part and the shell, and a second liquid storage space is reserved between the upper side and the guide plate. The first liquid storage space connects the sewage pipe and the second liquid storage space. The connecting port between the first liquid storage space and the second liquid storage space is higher than the sewage outlet of the sewage pipe for discharging sewage, and is lower than the sewage inlet of the sewage pipe for sewage to flow in.

14. The high-hanging low-resection auxiliary retractor according to any one of claims 5 to 13, characterized in that: The reflective adjustment component includes a first deformation part and a first reflective part arranged on the first deformation part, the first reflective part is directly opposite to a side surface of the expansion part facing the pressing part, and the reflection angle of the first reflective part can be adjusted by controlling the deformation of the first deformation part.

15. The high-hanging low-resection auxiliary retractor according to claim 14, characterized in that: The reflective adjustment component also includes a second deformation portion and a second reflective portion arranged on the second deformation portion, the second reflective portion is arranged on one side in the width direction of the first reflective portion, and the second reflective portion can be opened or folded by controlling the deformation of the second deformation portion. In the open state, the second reflective portion is located on one side in the width direction of the first reflective portion and can reflect light, and in the folded state, the second reflective portion does not exceed the edge of the expansion portion in the width direction.

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