Distraction device for minimally invasive surgery

Abstract

The invention relates to the field of minimally invasive surgery, in particular to a minimally invasive surgery distraction device which comprises a fixing ring and a supporting assembly, the fixing ring is provided with a through hole, the supporting assembly is arranged on the fixing ring and forms a through channel, and the through channel is communicated with the through hole. The supporting assembly comprises a plurality of supporting blades. A plurality of supporting blades are arranged on the fixing ring in a winding mode, the supporting blades can be opened or closed under the action of external force, the size of the passing channel is changed when the supporting blades are opened, and the gap between every two adjacent supporting assemblies is always kept in a closed state in the opening process. The supporting assembly can be placed into a surgical wound, muscle tissue in the wound is supported, a passing channel is formed, and a doctor can conveniently stretch into the passing channel through the passing hole in the fixing ring to reach a target position and perform a surgery on the target position. Meanwhile, the passing channel in a closed state is always kept, and inflow of tissue and blood can be avoided.

Description

Technical Field

[0001] The present application relates to the field of minimally invasive surgery, and in particular to a distraction device for minimally invasive surgery. Background Art

[0002] Minimally invasive spinal surgery is a relatively new technique that uses smaller incisions and special surgical tools to treat spinal diseases. Compared with traditional open surgery, minimally invasive surgery only requires several small incisions instead of one large incision. This means that the patient's pain and recovery time are reduced. At the same time, because the surgical incision is small, the amount of bleeding is relatively small, and most minimally invasive surgery patients can be discharged from the hospital in a short time.

[0003] Currently, minimally invasive spinal surgical channels are mainly established using tools such as expanders or single cannulas. When using a expander, the incision on the skin surface needs to be enlarged. After the expander is inserted and the expander wrench is rotated, the retractor on the expander head will expand. After expansion, muscle tissue and blood on both sides will bulge out. At this time, another expander is needed to support the opposite side, which will cause a larger wound and fail to effectively reduce the infiltration of muscle tissue and blood, thereby failing to achieve the desired minimally invasive effect.

[0004] In the invention patent with authorization announcement number CN110384526B, a minimally invasive surgical distraction device and distractor are disclosed. The channel formed by the incision through the left distraction semi-cylinder and the right distraction semi-cylinder is used to achieve a large opening of the surgical area under the skin and reduce the infiltration of muscle tissue and blood into the space between the left distraction semi-cylinder and the right distraction semi-cylinder.

[0005] However, since it is supported by two semi-cylindrical structures, the internal channel will be closed only when it is combined. Therefore, when the supporting structure is opened, there will be gaps between the left and right semi-cylindrical bodies. These gaps will still allow some muscle tissue and blood to penetrate into the channel, affecting the effect of the operation. Summary of the invention

[0006] In order to solve or at least partially solve the above technical problems, the present application provides a minimally invasive surgical expansion device, which includes: a fixed ring and a expansion assembly. The fixed ring has a through hole. The expansion assembly is arranged on the fixed ring and forms a through channel, which is connected to the through hole. The expansion assembly includes: a plurality of expansion blades. The plurality of expansion blades are wound around the fixed ring, and the expansion blades can be opened or closed under the action of external force, and change the size of the through channel when opening, and the gap between two adjacent expansion assemblies always remains in a closed state during the opening process.

[0007] Preferably, two adjacent propping blades at least partially overlap each other to complete the closure of the passage.

[0008] Preferably, the propping assembly further comprises: a blocking component, which is used to connect two adjacent propping blades and fill the gap between the two adjacent propping blades.

[0009] Preferably, the blocking component comprises: a film member. The film member has two ends connected to the sides of two adjacent propping blades facing the passage. When the two adjacent propping blades are opened, they move away from each other and pull the two ends of the film member to unfold the film member and fill the gap between the two adjacent propping blades.

[0010] Preferably, the blocking component further comprises: a supporting rib, the two ends of which are respectively connected to one side of two adjacent propping blades facing the passage, the supporting rib is gathered toward the inside of the passage, the film is arranged on the supporting rib, and is gathered or expanded along with the supporting rib.

[0011] Preferably, the fixing ring comprises: a bearing part. A first through hole is provided in the middle of the bearing part, and first slideways are provided on the bearing part around the first through hole, the number of which is the same as and corresponds to the number of the supporting blades. One end of the supporting blade is clamped into the first slideway and slides along the first slideway to open or close.

[0012] Preferably, the fixed ring further comprises: a plurality of movable sliders and a rotating ring. The number of the plurality of movable sliders is the same as that of the first slideway and corresponds one to one. The movable sliders are inserted into the corresponding first slideway and connected to the supporting blades. The rotating ring covers the bearing part and can rotate relative to the bearing part. The rotating ring is provided with a plurality of pushing parts. The pushing parts are the same as that of the movable sliders and correspond one to one. When the rotating ring rotates, the pushing parts drive the movable sliders to move along the first slideway.

[0013] Preferably, the upper surface of the movable slider is provided with a second slideway, the push part is inserted into the second slideway, the push part slides along the second slideway, and pushes the movable slider to move along the first slideway. After the movable slider is inserted into the first slideway, the second slideway is perpendicular to the first slideway.

[0014] Preferably, a positioning portion is provided on the upper surface of at least one movable slider, a positioning hole is provided on the rotating ring, and the fixed ring also includes a locking assembly, the locking assembly includes a locking needle, and the locking needle passes through the positioning hole from the upper surface of the rotating ring and is inserted into the positioning portion to lock the movable slider.

[0015] Preferably, the locking assembly further comprises: an elastic member and a release member. The elastic member is connected to the locking needle, and the elastic member pushes the locking needle to move toward the positioning portion. The release member is connected to the locking needle, and the release member is used to pull the locking needle to resist the elastic potential energy of the elastic member and separate from the positioning portion.

[0016] Compared with the prior art, the present invention uses a plurality of propping blades of the propping assembly to be placed into the muscle tissue through the surgical incision, and the muscle tissue is propped up by the expansion of the plurality of propping blades, and a passage is formed at the same time, so that the doctor's treatment instrument passes through the incision through the passage to reach the lesion, and performs surgery on the lesion. The passage formed by the plurality of propping blades can always remain sealed during the expansion process, preventing the tissue and blood in the muscle from infiltrating into the passage, and ensuring the normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the present application, the following is a brief introduction to the relevant drawings. It is understood that the drawings described below are only used to illustrate some implementations of the present application, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned in this document based on these drawings.

[0018] Figure 1 It is a three-dimensional schematic diagram of a minimally invasive surgical distraction device according to an embodiment of the present application;

[0019] Figure 2 It is a bottom view of a minimally invasive surgical distraction device according to an embodiment of the present application;

[0020] Figure 3 It is a three-dimensional schematic diagram of a minimally invasive surgical distraction device according to an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the internal structure of a fixing ring of a distraction device for minimally invasive surgery according to an embodiment of the present application;

[0022] Figure 5 is a side view of a minimally invasive surgical distraction device according to an embodiment of the present application;

[0023] Figure 6 It is a three-dimensional schematic diagram of a minimally invasive surgical distraction device according to another embodiment of the present application;

[0024] Figure 7 It is a three-dimensional schematic diagram of a minimally invasive surgical distraction device according to another embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1. Support assembly; 11. Support blade; 12. Blocking component; 2. Fixed ring; 21. Bearing part; 22. First slideway; 23. Moving slider; 231. Second slideway; 24. First through hole; 3. Rotating ring; 5. Lighting lamp bracket; 6. Locking assembly; 61. Locking pin; 62. Release member. DETAILED DESCRIPTION

[0027] Unless otherwise defined, technical or scientific terms used in the present specification and claims shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0028] All numerical values ​​from the lowest value to the highest value listed in this article refer to all numerical values ​​obtained by increments of one unit between the lowest value and the highest value when the difference between the lowest value and the highest value is more than two units.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] The present application is described in detail below in conjunction with the accompanying drawings.

[0032] Minimally invasive surgery is more commonly used during spinal surgery. It has the advantages of small incisions, less trauma, and quick recovery, and is the development trend of spinal surgery. For surgeries that only require single-segment vertebral screw and rod placement and simple intervertebral disc decompression, only a small channel is needed to open the surgical field of view and perform the surgery.

[0033] Due to the contractility of muscles, in order to ensure that minimally invasive surgery can always proceed normally, a distraction device is needed to keep the channel distracted. Currently, the establishment of a minimally invasive spinal surgery channel is mainly carried out using tools such as a distractor or a single cannula. When using the distractor, the incision on the skin surface needs to be enlarged. After the distractor is inserted and the distraction wrench is rotated, the retractor on the head of the distractor will expand. After the distraction, the muscle tissue and blood on both sides will flow into the channel. At this time, another distractor is needed to support the opposite side, which will cause a larger wound and fail to effectively reduce the infiltration of muscle tissue and blood, and the desired minimally invasive effect cannot be achieved.

[0034] While the expansion device provided in the prior art can be inserted into the wound and expand the muscle tissue, the left and right expansion semi-cylindrical bodies of the expansion device can prevent a portion of blood and muscle tissue from flowing in.

[0035] However, the expansion device composed of a left expansion semi-cylinder and a right expansion semi-cylinder will form a gap between the two semi-cylinders when separated. When the expansion device expands the muscles in the wound, some muscle tissue and blood will still flow into the channel along the gap, thus affecting the progress of the operation.

[0036] In view of this, the first embodiment of the present application proposes a minimally invasive surgical distraction device to solve the above technical problems.

[0037] First embodiment

[0038] References Figure 6 A minimally invasive surgical expansion device is shown, which includes: a fixed ring 2 and a expansion assembly 1. The fixed ring 2 has a through hole. The expansion assembly 1 is arranged on the fixed ring 2 and forms a through channel, which is connected to the through hole. The expansion assembly 1 includes: a plurality of expansion blades 11. The plurality of expansion blades 11 are wound around the fixed ring 2, and the expansion blades 11 can be opened or closed under the action of external force, and change the size of the through channel when opened, and the gap between two adjacent expansion assemblies 1 always remains in a closed state during the opening process.

[0039] A plurality of propping components 1 arranged on the fixing ring 2 can surround and form a through channel, and the through channel is connected to the middle through hole of the fixing ring 2. When performing minimally invasive surgery, the propping component 1 of the device is partially extended into the formed wound, so that the propping blades 11 of the propping component 1 fit the muscle tissue in the window. Multiple propping blades 11 are arranged inside the wound at the same time, so that the multiple propping blades 11 are separated from each other and the diameter of the through channel is increased. It is not difficult to find that the multiple propping blades 11 can simultaneously expand the muscle tissue and prevent the muscle from retracting, thereby forming a complete surgical channel. Specifically, the muscle tissue is propped up by the through channel, and the doctor can directly enter through the wound during the operation, reach the target lesion through the through channel and perform the operation. The gap between each propping blade 11 is always kept at zero during the expansion of the through channel, so that the tissue and blood in the muscle cannot penetrate into the through channel, ensuring that the through channel can always be unaffected during the operation, thereby improving the quality of the operation.

[0040] In addition, in order to make the passage supported by the supporting blades 11 easier to find the lesion, each supporting blade 11 is inclined from one end connected to the fixing ring 2 in a direction away from each other to form a trumpet-shaped passage, so that the diameter of the passage gradually increases from the fixing ring 2. This allows the passage formed by the supporting blades 11 to support more space for the lesion and provide more surgical space for the doctor when the size of the wound remains unchanged.

[0041] Furthermore, since the supporting blades 11 need to be in direct contact with the muscle tissue and obtain a passage through the supporting muscle tissue, in order to prevent the supporting blades 11 from causing secondary damage to the muscle tissue in the wound, the surface of the supporting blades 11 needs to be covered with a smooth material and made of a material similar to titanium alloy. At the same time, hydrogel is set at the edge of the supporting blades 11 to prevent secondary scratches.

[0042] At the same time, reference Figure 7 The support assembly 1 further includes a blocking component 12 . The blocking component 12 is used to connect two adjacent support blades 11 and fill the gap between the two adjacent support blades 11 .

[0043] When the expansion blades are unfolded, the channel diameter changes, resulting in an increase in the distance between two adjacent expansion blades. When the channel diameter expands to a certain extent, a certain gap will be formed between two adjacent expansion blades because the expansion blade width remains unchanged. At this time, the role of the blocking component 12 becomes particularly important. It can fill this gap and effectively prevent the blood or muscle tissue in the wound from penetrating into the channel through this gap, thereby ensuring the clarity of the field of vision inside the channel and ensuring the smooth progress of minimally invasive surgery.

[0044] Specifically, the blocking member 12 includes a film member. The film member has two ends connected to the sides of the two adjacent propping blades 11 facing the passage. When the two adjacent propping blades 11 are opened, they move away from each other and pull the two ends of the film member to expand the film member and fill the gap between the two adjacent propping blades 11.

[0045] Since the expansion of the channel is achieved by means of a plurality of adjacent and gradually moving away propping blades 11, when the channel is in the initial closed state, there is no gap between the two adjacent propping blades 11, and naturally there is no need for a blocking component 12 to fill the non-existent gap. The film can be compactly gathered when the channel is closed. When the channel begins to expand, the distance between the two adjacent propping blades 11 increases, and the two ends of the film are stretched and unfolded, thereby effectively preventing the blood or muscle tissue in the wound from flowing into the channel. Specifically, in order to ensure that the film does not scratch the muscle tissue during the unfolding process, the two ends of the film should be connected to the two adjacent propping blades 11 respectively, and face one side of the channel. The film is mostly made of soft and elastic biomedical materials, such as silicone rubber, polyurethane, etc. These materials can not only fit closely to the edge of the wound to prevent leakage of blood and muscle tissue, but also provide a smooth surface when the propping blades 11 are unfolded, reducing the risk of scratching the muscle tissue. At the same time, the film also has certain antibacterial properties, which helps to reduce the postoperative infection rate.

[0046] In the embodiment of the present application, the blocking component 12 further includes: a supporting rib. The two ends of the supporting rib are respectively connected to the side of two adjacent propping blades 11 facing the passage, the supporting rib is retracted toward the inside of the passage, and the film is arranged on the supporting rib and retracts or unfolds with the supporting rib.

[0047] The support device needs to be readjusted after the operation, and each support blade 11 is folded and brought close to each other to reduce the channel diameter and remove it from the wound. Since the film piece is made of flexible material, its bending direction is difficult to fix, so the setting of the support ribs is particularly important. The support ribs can guide the bending direction of the film piece to ensure that the film component is still located inside the channel after bending, and avoid the film component remaining on the outer surface of the support component 1 after folding, thereby ensuring that the support component 1 can be smoothly removed from the wound after the operation. Specifically, the support ribs can be designed as two rotatably connected straight rods, and the connection between these two straight rods and the support blades 11 is also rotatably connected. The film piece is mounted on the straight rods. When the support blades 11 are folded and brought close to each other, the two straight rods of the support ribs will rotate and fold, thereby driving the film piece to fold. Similarly, when the support blades 11 are unfolded, the two straight rods of the support ribs will also rotate and unfold, thereby driving the film piece to unfold.

[0048] Second embodiment

[0049] In the first embodiment of the present application, a minimally invasive surgical distraction device is disclosed, which supports the muscle tissue by expanding the passageway surrounded by a plurality of supporting blades 11 inside the wound, thereby forming a surgical passageway. The blocking component 12 located between two adjacent supporting blades 11 can prevent the muscle tissue or blood in the wound from flowing into the passageway. Although the supporting assembly 1 composed of a plurality of blocking components 12 and a plurality of supporting blades 11 can effectively prevent the infiltration of blood and muscle tissue, its structure is relatively complex, and the small incision of minimally invasive surgery increases the difficulty of manufacturing the components.

[0050] In view of this, the second embodiment of the present application is improved compared with the first embodiment in that, referring to Figure 1 and Figure 2 The two adjacent propping blades 11 shown are at least partially kept overlapping each other to complete the closing of the through passage.

[0051] The plurality of propping blades 11 enclose a channel. When two adjacent propping blades 11 at least partially overlap, they can shield each other so that there is no gap on the side wall of the channel. In order to ensure the operating space at the lesion, these propping blades 11 will form a trumpet-shaped channel. Figure 5 , the width of the propping blade 11 gradually increases from the connection with the fixing ring 2, and the width of the end away from the fixing ring 2 is greater than the connection, so the diameter of the trumpet-shaped channel also gradually increases from the fixing ring 2. This design can ensure that adjacent blades always overlap when expanding or contracting. In order to support the muscle tissue in the incision without damaging the muscle tissue, the opening size of the trumpet-shaped channel formed by the propping blade 11 should be controlled between 30° and 60°, which not only ensures the support effect on the muscle tissue, but also provides sufficient surgical space for the lesion.

[0052] Looking further, refer to Figure 2 or Figure 4 To ensure that the multiple propping blades 11 do not interfere with each other when expanding or contracting, each propping blade 11 overlaps in the same direction, such as all overlapping in a clockwise or counterclockwise direction, thereby ensuring smooth expansion or contraction of the channel and avoiding mutual interference.

[0053] In addition, reference Figure 3 or Figure 4 The fixing ring 2 shown includes: a bearing portion 21. A first through hole 24 is provided in the middle of the bearing portion 21, and first slideways 22 are provided on the bearing portion 21 around the first through hole 24, the same number as the supporting blades 11 and corresponding to each other. One end of the supporting blade 11 is clamped into the first slideway 22, and slides along the first slideway 22 to open or close.

[0054] The channel formed by the propping blades 11 needs to be expanded or folded. When the propping blades 11 slide in the corresponding first slide 22, they will change the distance between adjacent blades and adjust the size of the channel diameter accordingly. The design of the first slide 22 can accurately control the sliding amplitude of each propping blade 11, ensuring that all blades evenly expand or fold the channel with the same amount of movement. In addition, the first slide 22 is arranged in an inclined manner so that the blades carried thereon can obtain a longer movement distance. At the same time, the ends of the propping blades 11 are designed to be square to prevent relative rotation during movement along the first slide 22. This mechanism allows the doctor to accurately adjust the position of the propping blades 11 according to the surgical requirements, thereby achieving precise control of the channel size. At the same time, the mechanism also has a high degree of reliability and stability, ensuring that no unexpected movement or failure occurs during the operation. Ensure that the shape of the channel is stable during the expansion or folding process, thereby ensuring that the muscle tissue is smoothly propped up.

[0055] In the embodiment of the present application, the fixed ring 2 further includes: a plurality of movable sliders 23 and a rotating ring 3. The plurality of movable sliders 23 are the same in number and correspond one to one with the first slideway 22, and the movable sliders 23 are inserted into the corresponding first slideway 22 and connected to the propping blades 11. The rotating ring 3 covers the bearing portion 21 and can rotate relative to the bearing portion 21. The rotating ring 3 is provided with a plurality of pushing parts, and the pushing parts are the same in number and correspond one to one with the movable sliders 23. When the rotating ring 3 rotates, the pushing parts drive the movable sliders 23 to move along the first slideway 22.

[0056] A plurality of propping blades 11 together constitute a passage, which supports the internal muscle tissue by expanding in the wound. The synchronous movement rate of each propping blade 11 constituting the passage will directly affect the expansion effect of the passage. When rotating, the rotating ring 3 can simultaneously act on each movable slider 23 connected to the propping blade 11, and these sliders are stuck in the first slideway 22. When the rotating ring 3 rotates, it pushes the multiple sliders to move together. Under the push of the rotating ring 3, the slider moves along the first slideway 22, thereby driving the corresponding propping blade 11 to move, and realizing the synchronous action of all the propping blades 11. When all the propping blades 11 move synchronously, the channel can achieve the function of expansion and contraction, thereby realizing the propping of the muscle tissue in the wound. In addition, the rotating ring 3 that can generate relative rotation with the bearing part 21 ensures that each push part located thereon can act on the corresponding slider at the same time, so that the synchronous movement of multiple push parts can be realized by rotating the rotating ring 3, which simplifies the operation difficulty of the user. Only one rotation action is needed to replace the individual expansion action of multiple propping blades 11, reducing the complexity of the operation during the doctor's operation.

[0057] Furthermore, the motion trajectory of the pusher on the rotating ring 3 remains unchanged, and performs arc motion with a constant radius around the center of the rotating ring 3. However, the motion trajectory of the propping blade 11 does not perform arc motion around the center of the rotating ring 3. Therefore, no matter where the moving slider 23 is in the first slideway 22, the larger slider can always be located on the moving trajectory of the pusher, and the slider drives the propping blade 11 to move, thereby realizing the expansion and contraction of the channel.

[0058] In addition, a second slideway 231 is provided on the upper surface of the movable slider 23, and the pusher is inserted into the second slideway 231. The pusher slides along the second slideway 231 and pushes the movable slider 23 to move along the first slideway 22. After the movable slider 23 is inserted into the first slideway 22, the second slideway 231 and the first slideway 22 are perpendicular to each other.

[0059] The push part is inserted into the second slideway 231, so that each moving slider 23 can be connected to the rotating ring 3. When the rotating ring 3 rotates, it can ensure that each moving slider 23 is driven to move, avoiding the separation between the push part and the moving slider 23, and ensuring the movement of the propping blade 11. At the same time, the second slideway 231 located on the push part and the first slideway 22 located on the bearing part 21 maintain a mutually perpendicular relationship. In plane geometry, a circle can be defined by two mutually perpendicular diameters. These two diameters divide the circle into four quadrants, and the distance from the point in each quadrant to the center of the circle is equal, and the distance relationship with the two diameters satisfies the Pythagorean theorem. When the straight line where these two diameters are located is rotated and translated, the shape of a circle can be constructed. Therefore, the combination of the first slideway 22 and the second slideway 231 can construct the arc required for the motion trajectory of the push part, so that the expansion and gathering of the propping blade 11 can be achieved by rotating the rotating ring 3, thereby achieving the change of the diameter of the channel and completing the support of the muscle tissue in the wound.

[0060] In addition, reference Figure 1 , Figure 3 and Figure 5 As shown, a positioning portion is provided on the upper surface of at least one movable slider 23, a positioning hole is provided on the rotating ring 3, and the fixed ring 2 also includes a locking assembly 6, the locking assembly 6 includes a locking needle 61, and the locking needle 61 is inserted into the positioning portion through the positioning hole from the upper surface of the rotating ring 3 to lock the movable slider 23.

[0061] When using the expansion device, it is necessary to rotate the rotating ring 3 to drive the moving slider 23 to move, and then the moving slider 23 pushes the supporting blades 11 connected thereto to move, thereby realizing the expansion and contraction of the channel formed by multiple supporting blades 11. When the rotating ring 3 reaches the target position, it means that the channel has expanded to the desired state and provides effective support for the muscle tissue in the wound. During minimally invasive surgery, the supporting blades 11 need to remain stationary to ensure that the channel maintains a stable expansion shape. After the rotating ring 3 rotates to the extreme position, the locking pin 61 of the locking assembly 6 can pass through the positioning hole and be inserted into the positioning portion on the moving slider 23, thereby locking the moving slider 23. Once locked, the moving slider 23 will no longer be able to move, and the supporting blades 11 connected thereto will also remain stationary.

[0062] Since all the moving sliders 23 are synchronously controlled by the rotating ring 3, there is a mutually linked relationship between them. When one of the moving sliders 23 is locked and cannot move, the remaining moving sliders 23 will also remain stationary. Therefore, at least one locking component 6 needs to be set to fix the posture of the entire channel by locking one moving slider 23. In addition, a separate locking component 6 is more convenient for doctors to operate. Of course, in some cases, in order to enhance the locking effect, multiple locking components 6 can also be set at the same time. The number of locking components 6 can be flexibly selected according to actual needs and usage scenarios.

[0063] Furthermore, the locking assembly 6 further includes: an elastic member and a release member 62. The elastic member is connected to the locking pin 61, and the elastic member pushes the locking pin 61 to move toward the positioning portion. The release member 62 is connected to the locking pin 61, and the release member 62 is used to pull the locking pin 61 to resist the elastic potential energy of the elastic member and separate from the positioning portion.

[0064] The relative positions of the positioning hole on the rotating ring 3 and the pushing part on the rotating ring 3 will always remain unchanged, so when the pushing part pushes the moving slider 23 to the limit position, the positioning hole will also accurately rotate to the locking component 6. When the positioning hole rotates to the bottom of the locking pin 61, the locking pin 61 will pass through the positioning hole and be inserted into the positioning part of the moving slider 23 under the push of the elastic member to lock the moving slider 23. There is no need to manually operate the locking component 6. Only by rotating the rotating ring 3 to the target angle can the muscle tissue in the wound be propped up and the locking of the passage be satisfied. The operation of expanding the muscle tissue in the wound during the hand speed process is simplified, which facilitates the smooth progress of the operation.

[0065] In addition, when the minimally invasive surgery is completed and the propping assembly 1 needs to be taken out of the wound, the release member 62 is pulled so that the locking needle 61 can resist the elastic potential energy of the elastic member. When the locking needle 61 is separated from the positioning portion until it moves outside the positioning hole, the rotating ring 3 is rotated so that the positioning hole is no longer located below the locking needle 61. Through the reverse rotation of the rotating ring 3, the propping blades 11 can be gathered, so that the diameter of the passage becomes smaller until it matches the wound, and the propping device is taken out of the wound to complete the surgery. At the same time, since the minimally invasive surgery propping device is relatively small, external tools such as tweezers and other equipment will be needed to operate the release member 62. In order to facilitate the operation of the release member 62 by tweezers and other equipment, a through hole will be provided on the release member 62, so that the tweezers and other equipment can directly pass the end through the through hole for operation.

[0066] Finally, reference Figure 1 , Figure 5 As shown, a plurality of lighting lamp brackets 5 are also provided on the fixing ring 2. When performing minimally invasive surgery, it is necessary to pass through the passage to treat the lesion area. However, the wound has a small caliber, and it is difficult for external light to directly irradiate into the wound, and the doctor is also very likely to block the external light when performing the operation. Therefore, the light source is directly installed on the corresponding illumination lamp bracket, and the wound and the internal channel in the wound are illuminated, providing light source for the surgical process, which is convenient for the doctor's operation.

[0067] Finally, it should be noted that those skilled in the art can understand that in order to enable readers to better understand the present application, the embodiments of the present application provide many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned embodiments, the technical solutions claimed for protection by the claims of the present application can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned embodiments in form and detail without departing from the spirit and scope of the present application.

Claims

1. A minimally invasive surgical distraction device, characterized in that: It includes: A fixing ring (2) having a through hole; A support assembly (1) is arranged on the fixing ring (2) and forms a through passage, wherein the through passage is connected to the through hole; The supporting assembly (1) comprises: A plurality of propping blades (11) are wound around the fixing ring (2); the propping blades (11) can be opened or closed under the action of an external force and change the size of the passage when opened, and the gap between two adjacent propping components (1) always remains in a closed state during the opening process.

2. The minimally invasive surgical distraction device according to claim 1, characterized in that: The two adjacent propping blades (11) at least partially overlap each other to complete the closure of the through channel.

3. The minimally invasive surgical distraction device according to claim 1, characterized in that: The supporting assembly (1) further comprises: The blocking component (12) is used to connect two adjacent propping blades (11) and to fill the gap between the two adjacent propping blades (11).

4. The minimally invasive surgical distraction device according to claim 3, characterized in that: The blocking component (12) comprises: A thin film member, two ends of which are respectively connected to one side of two adjacent propping blades (11) facing the through channel; When the two adjacent propping blades (11) are opened, they move away from each other and pull the two ends of the film element, so as to unfold the film element and fill the gap between the two adjacent propping blades (11).

5. The minimally invasive surgical distraction device according to claim 4, characterized in that: The blocking component (12) further comprises: Support ribs, two ends of which are respectively connected to one side of two adjacent propping blades (11) facing the passage; The supporting ribs are gathered toward the inside of the through channel, and the film member is arranged on the supporting ribs and is gathered or expanded following the supporting ribs.

6. The minimally invasive surgical distraction device according to any one of claims 1 to 5, characterized in that: The fixing ring (2) comprises: A bearing portion (21) having a first through hole (24) in the middle thereof, and the bearing portion (21) is provided with first slideways (22) around the first through hole (24) in the same number as the supporting blades (11) and in one-to-one correspondence; One end of the propping blade (11) is clamped into the first slideway (22) and slides along the first slideway (22) to open or close.

7. The minimally invasive surgical distraction device according to claim 6, characterized in that: The fixing ring (2) further comprises: A plurality of movable sliders (23), the number of which is the same as that of the first slideways (22) and corresponds one to one, the movable sliders (23) being inserted into the corresponding first slideways (22) and connected to the supporting blades (11); a rotating ring (3), the rotating ring (3) covering the bearing portion (21) and being capable of rotating relative to the bearing portion (21); The rotating ring (3) is provided with a plurality of pushing parts, the pushing parts are the same in number and correspond one to one with the moving sliders (23), and when the rotating ring (3) rotates, the pushing parts drive the moving sliders (23) to move along the first slideway (22).

8. The minimally invasive surgical distraction device according to claim 7, characterized in that: The upper surface of the movable slider (23) is provided with a second slideway (231), the pushing portion is clamped into the second slideway (231), the pushing portion slides along the second slideway (231), and pushes the movable slider (23) to move along the first slideway (22); After the movable sliding block (23) is inserted into the first slideway (22), the second slideway (231) and the first slideway (22) are perpendicular to each other.

9. The minimally invasive surgical distraction device according to claim 7, characterized in that: A positioning portion is provided on the upper surface of at least one of the movable sliders (23); The rotating ring (3) is provided with a positioning hole; The fixing ring (2) also includes a locking assembly (6), and the locking assembly (6) includes a locking pin (61). The locking pin (61) is inserted into the positioning portion through the positioning hole from the upper surface of the rotating ring (3) to lock the movable slider (23).

10. The minimally invasive surgical distraction device according to claim 9, characterized in that: The locking assembly (6) further comprises: an elastic member connected to the locking needle (61), wherein the elastic member pushes the locking needle (61) to move toward the positioning portion; A release member (62) is connected to the locking needle (61), and the release member (62) is used to pull the locking needle (61) to resist the elastic potential energy of the elastic member and separate from the positioning part.

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