An auxiliary tool for lumbar vertebra minimally invasive surgery

Abstract

The application provides an auxiliary tool for lumbar vertebra minimally invasive surgery and belongs to the technical field of medical instruments. The auxiliary tool comprises a base, a positioning seat and an inner layer guide cylinder. The base is a strip-shaped plate structure and is used for being pasted on the incision of a patient. A sliding groove is formed in the middle part of the base. The side of the base close to the skin of the patient is the bottom. A degradable polymer bag is matched with the bottom of the base. The polymer bag is filled with cell growth factors. The positioning seat is slidingly installed in the sliding groove. A locking mechanism is arranged between the base and the positioning seat and is used for locking the positioning seat at any sliding position in the sliding groove. An outer layer guide hole is formed in the middle part of the positioning seat. The inner layer guide cylinder is penetratingly installed in the outer layer guide hole. The inner layer guide cylinder is a hollow pipe body structure. A puncture part is arranged at the end of the inner layer guide cylinder penetrating out of the bottom of the base. The application improves the precision of instrument guidance through the synergistic effect of various components. The incision repair is improved in cooperation with the polymer bag. The effect of the lumbar vertebra minimally invasive surgery is effectively improved. The postoperative recovery of the patient is facilitated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an auxiliary tool for minimally invasive lumbar spine surgery. Background Technology

[0002] Minimally invasive lumbar spine surgery is a modern surgical method for treating lumbar disc herniation, characterized by minimal trauma, rapid recovery, and definite efficacy. This surgery primarily involves making a small incision and, with the assistance of an endoscope or microscope, precisely removing the herniated nucleus pulposus tissue, minimizing interference with muscles and bones.

[0003] Currently, traditional surgical instrument guidance structures have certain limitations. Due to the complex anatomy around the lumbar spine and individual differences among patients, traditional instrument guidance structures are difficult to accurately guide surgical instruments to the ideal surgical site. This leads to frequent adjustments to the instrument position during the operation, which not only prolongs the operation time and increases the patient's pain, but may also cause unnecessary damage to surrounding tissues due to multiple adjustments.

[0004] Therefore, this application provides an auxiliary tool for minimally invasive lumbar spine surgery to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an auxiliary tool for minimally invasive lumbar spine surgery to solve the problem that the existing surgical instrument guiding structure is not conducive to accurately guiding the position of surgical instruments, thus affecting the efficiency of the operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] An auxiliary tool for minimally invasive lumbar spine surgery, comprising a base, a positioning seat, and an inner guide tube;

[0008] The base is a strip-shaped plate structure used to adhere and cover the patient's incision. A groove is provided in the middle of the base, and the side of the base that is in close contact with the patient's skin is the bottom. A biodegradable polymer capsule is fitted to the bottom of the base, and the polymer capsule is filled with cell growth factors.

[0009] The positioning seat is slidably installed in the slide groove, and a locking mechanism is provided between the base and the positioning seat for locking the positioning seat in any sliding position in the slide groove. An outer guide hole is provided in the middle of the positioning seat.

[0010] The inner guide tube is inserted into the outer guide hole, and the inner guide tube has a hollow tube structure. One end of the inner guide tube that protrudes from the bottom of the base is provided with a puncture part.

[0011] Optionally, symmetrical limit grooves are formed on the inner walls of both sides of the slide groove, and symmetrical limit sliding edges are fixed on both sides of the positioning seat, with the limit sliding edges slidingly embedded in the limit grooves.

[0012] Optionally, the locking mechanism includes a toothed portion disposed on the outer side of the base, and the end of the positioning seat is provided with a positioning frame extending out of the toothed portion.

[0013] Optionally, a stud is threaded through the positioning frame, and a positioning toothed plate is rotatably mounted on the end of the stud.

[0014] Optionally, the positioning toothed plate slides horizontally against the inner side of the positioning frame, and the side of the positioning toothed plate away from the stud engages with the toothed edge.

[0015] Optionally, the inner guide tube is provided with axial graduations, and the port of the inner guide tube away from the puncture part is provided with a friction-reducing coating.

[0016] Optionally, the inner guide tube has several symmetrically arranged fixing ports in the middle, and the polymer bag is snapped and fixed in the fixing ports.

[0017] Optionally, a baffle is movably connected to the inner end of the fixed port. The baffle is inclined inside the inner guide tube, and when the surgical instrument passes through the inner guide tube, the polymer bag is squeezed out to the tissue inside the patient's incision by squeezing open the inclined baffle.

[0018] Optionally, the bottom of the base is symmetrically provided with slots on both sides of the slide groove, and the polymer bag is snapped and fixed in the slots.

[0019] Optionally, the main component of the polymer bag is polylactic acid-glycolic acid copolymer.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In the above solution, the sliding arrangement of the positioning seat within the base, combined with the limiting action of the limiting ridge and the limiting groove, ensures stable sliding of the positioning seat, allowing the inner guide tube to be precisely adjusted within a certain range. Simultaneously, the positioning seat is precisely engaged and fixed to the toothed portion of the base via a stud and a positioning toothed plate, further improving the accuracy of the inner guide tube's position. Furthermore, the graduations on the inner guide tube help the surgeon accurately determine its insertion depth, thereby improving the precision of surgical instrument guidance and reducing the risk of prolonged surgery and tissue damage due to inaccurate instrument guidance.

[0022] In the above-described approach, by placing the polymer capsule at the bottom of the base, during the surgery, as surgical instruments pass through the inner guide tube, the polymer capsule is accurately extruded into the patient's incision tissue via a baffle. Alternatively, the base can be left on the patient's skin surface as a protective plate, allowing the polymer capsule to remain at the incision site along with the base, degrading and releasing cell growth factors. This creates a good synergy between the surgical procedure and the postoperative recovery process, effectively keeping the polymer capsule at the incision site, improving surgical wound repair, and enhancing patient recovery efficiency.

[0023] In summary, this device improves the accuracy of instrument guidance through the synergistic effect of its components, and, in conjunction with the polymer bag, enhances incision repair, effectively improving the outcome of minimally invasive lumbar spine surgery and facilitating postoperative recovery for patients. Attached Figure Description

[0024] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0025] Figure 1 This is a schematic diagram of the structure of the first embodiment;

[0026] Figure 2 This is a schematic diagram of the base structure in the first embodiment;

[0027] Figure 3 This is a schematic diagram of the positioning seat in the first embodiment;

[0028] Figure 4 This is a schematic diagram of the inner guide tube in the first embodiment;

[0029] Figure 5 This is a schematic diagram of the internal structure of the inner guide tube in the first embodiment;

[0030] Figure 6 This is a schematic diagram of the structure of the second embodiment;

[0031] Figure 7 This is a schematic diagram of the bottom structure of the base in the second embodiment.

[0032] [Figure Labels]

[0033] 1. Base; 101. Slide groove; 102. Limiting groove; 103. Toothed edge; 104. Slot; 2. Positioning seat; 201. Outer guide hole; 202. Limiting slide edge; 203. Positioning frame; 204. Stud; 205. Positioning toothed plate; 3. Inner guide tube; 301. Puncture part; 302. Anti-friction coating; 303. Fixing port; 304. Baffle; 4. Bio-adhesive tape; 5. Polymer bag.

[0034] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0035] The following is a detailed description of an auxiliary tool for minimally invasive lumbar spine surgery provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0036] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0037] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0038] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0039] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0040] Example 1:

[0041] like Figure 1 As shown, Embodiment 1 of the present invention provides an auxiliary tool for minimally invasive lumbar spine surgery, including a base 1, a positioning seat 2, and an inner guide tube 3. The base 1 is a strip-shaped plate structure used to adhere and cover the patient's incision. A groove 101 is provided in the middle of the base 1, and the side of the base 1 that is in close contact with the patient's skin is the bottom. A biodegradable polymer bag 5 is fitted to the bottom of the base 1, and the polymer bag 5 is filled with cell growth factors. The positioning seat 2 is slidably installed in the groove 101, and a locking mechanism is provided between the base 1 and the positioning seat 2 to lock the positioning seat 2 in any sliding position within the groove 101. An outer guide hole 201 is provided in the middle of the positioning seat 2. The inner guide tube 3 is inserted into the outer guide hole 201, and the inner guide tube 3 is a hollow tube structure. A puncture part 301 is provided at one end of the inner guide tube 3 that protrudes from the bottom of the base 1.

[0042] Specifically, this auxiliary tool can be available in various models. When using it, the corresponding model can be selected so that the base 1 is adapted to the size of the patient's incision, for example, approximately 3-5 cm in length. The inner guide tube 3 has an inner diameter of 3-5 mm and a length of 5-10 cm to ensure smooth access to the lesion location.

[0043] like Figure 2 and Figure 3 As shown, the base 1 serves as a positioning reference, adapting to and positioning itself at the patient's incision site through its strip plate structure. The positioning seat 2 slides within the groove 101 to adjust the horizontal position of the outer guide hole 201, adapting to different surgical approach requirements. Once the positioning seat 2 reaches the target position, a locking mechanism locks it within the groove 101, ensuring the guide path remains stable during subsequent operations. The inner guide tube 3 is inserted within the outer guide hole 201, and its inner diameter and length ensure that the surgical instrument can smoothly reach the lesion site along the tube. Thus, through the coordination of "base positioning → groove adjustment → locking fixation → guide tube limiting," the unity of adjustable external position and stable internal guide path is achieved, effectively improving the accuracy of the surgical instrument reaching the target and the reliability of operation.

[0044] Furthermore, the upper and lower ends of the base 1 are fitted with bio-adhesive tape 4, which is a low-sensitivity bio-adhesive tape. Before application, an adaptability test is performed on the patient's skin, so that the base 1 can be adhered to and covered at the patient's incision site using the bio-adhesive tape 4.

[0045] The sliding groove 101 has symmetrically formed limiting grooves 102 on both inner walls, and the positioning seat 2 has symmetrically fixed limiting sliding ribs 202 on both sides, which slide into the limiting grooves 102. The locking mechanism includes a toothed portion 103 on the outer side of the base 1, and a positioning frame 203 extending beyond the toothed portion 103 at the end of the positioning seat 2. A stud 204 is threaded through the positioning frame 203, and a positioning toothed plate 205 is rotatably mounted at the end of the stud 204. The positioning toothed plate 205 slides horizontally against the inner side of the positioning frame 203, and the side of the positioning toothed plate 205 away from the stud 204 engages with the toothed portion 103.

[0046] In addition, the side of the base 1 that is in close contact with the patient's skin is the bottom, and the inner guide tube 3 is a hollow tube structure. The end of the inner guide tube 3 that extends out of the bottom of the base 1 is provided with a puncture part 301. The port of the inner guide tube 3 away from the puncture part 301 is provided with a friction-reducing coating 302. The friction-reducing coating 302 is a Teflon coating, which can significantly reduce the friction when surgical instruments enter and exit, and reduce potential damage to tissues. The inner guide tube 3 is also provided with axial graduations, which can be used to help medical staff to clearly understand the insertion depth of surgical instruments.

[0047] Specifically, the puncture portion 301 has a blunt conical structure with a rounded tip (radius of curvature ≥ 0.5 mm) to avoid cutting damage to the nerve root and dura mater during puncture. Furthermore, the outer surface of the puncture portion 301 is provided with a smooth coating to reduce tissue resistance during puncture.

[0048] The base 1 has a biodegradable polymer capsule 5 at its bottom, which is filled with cell growth factors. The main component of the polymer capsule 5 is polylactic acid-glycolic acid copolymer, and the capsule wall thickness is about 0.1-0.2 mm, which ensures sufficient strength for the cell growth factors without affecting their degradation performance. The cell growth factors filled in the polymer capsule 5 include epidermal growth factor, platelet-derived growth factor, and hyaluronic acid. The concentration of epidermal growth factor is about 10-50 ng / mL, and the concentration of platelet-derived growth factor is about 20-80 ng / mL, which can effectively stimulate cell proliferation and repair in the tissue around the incision. The molecular weight of hyaluronic acid is about 100-500 kDa, which has good moisturizing and cell migration promotion effects.

[0049] like Figure 4 and Figure 5 As shown, the inner guide tube 3 has several symmetrically arranged fixing ports 303 in the middle. The polymer bag 5 is snapped and fixed in the fixing port 303, and a baffle 304 is movably connected to the inner end of the fixing port 303. The baffle 304 is placed obliquely inside the inner guide tube 3. When the surgical instrument passes through the inner guide tube 3, the polymer bag 5 is squeezed out to the inside of the patient's incision tissue by squeezing open the oblique baffle 304. This allows the polymer bag 5 to remain in the inside of the patient's incision tissue to degrade and release cell growth factors, thereby improving the postoperative recovery effect.

[0050] Specifically, such as Figure 5 As shown, one end of the baffle 304 is movably connected to the fixing port 303 via a pivot or flexible hinge. In its natural state, the baffle 304 is inclined inward towards the inner guide tube 3. When a surgical instrument (such as a guidewire or dilator) travels along the axial direction of the inner guide tube 3 towards the puncture site 301, the outer wall of the instrument contacts and pushes the baffle 304 outward around its axial direction. When the baffle 304 flips, its outer surface pushes against the polymer pouch 5 that is engaged with the fixing port 303, causing the polymer pouch 5 to disengage from the fixing port 303 and be pushed to the outside of the inner guide tube 3, thereby reaching the tissue inside the patient's incision.

[0051] Example 2:

[0052] like Figure 6 and Figure 7 As shown, Embodiment 2 of the present invention provides an auxiliary tool for minimally invasive lumbar spine surgery. The difference from Embodiment 1 is that: the bottom of the base 1 is symmetrically provided with slots 104 on both sides of the slide groove 101. The polymer bag 5 is snapped and fixed in the slots 104. After the operation, the base 1 is left on the patient's skin surface as a protective plate, so that the polymer bag 5 stays at the incision position with the base 1, degrades and releases cell growth factors.

[0053] The workflow of the technical solution provided by this invention is as follows:

[0054] In use, the positioning seat 2 slides within the base 1, and with the limiting engagement of the limiting slide 202 and the limiting groove 102, ensuring stable sliding of the positioning seat 2, allowing the inner guide tube 3 to be precisely adjusted within a certain range. Simultaneously, the positioning seat 2 is precisely engaged and fixed to the toothed portion 103 of the base 1 via the positioning frame 203 and the engagement of the stud 204 and positioning toothed plate 205, further improving the accuracy of the position of the inner guide tube 3. Furthermore, the graduations on the inner guide tube 3 help the surgeon accurately determine its insertion depth, thereby improving the precision of surgical instrument guidance and reducing the risk of prolonged surgery and tissue damage due to inaccurate instrument guidance.

[0055] In addition, by placing the polymer capsule 5 at the bottom of the base 1, during the operation, when the surgical instruments pass through the inner guide tube 3, the inclined inward baffle 304 is pushed outward, and the baffle 304 is used to accurately squeeze the polymer capsule 5 into the tissue inside the patient's incision, so that the polymer capsule 5 is left in the tissue inside the patient's incision, and it degrades and releases cell growth factors in the later 3-5 weeks.

[0056] Alternatively, in another embodiment, after surgery, the base 1 is left on the patient's skin surface as a protective plate, so that the polymer capsule 5 remains at the incision site along with the base 1, allowing the polymer capsule 5 to degrade and release cell growth factors to the incision site.

[0057] Through the above-mentioned embodiments, the surgical operation and postoperative recovery process are well coordinated, and the polymer bag 5 is left at the incision site, which improves the surgical incision repair effect and helps to improve the patient's recovery efficiency.

[0058] It should be noted that the auxiliary tool for minimally invasive lumbar spine surgery provided by this invention needs to be sterilized before use. Since the polymer capsule contains polylactic acid-glycolic acid copolymer and cell growth factors, it is not suitable to use high-temperature autoclave sterilization or ethylene oxide sterilization. Cobalt-60 irradiation sterilization at a dose of 15-25 kGy is preferred, or low-temperature plasma sterilization. After sterilization, the structural integrity of the polymer capsule and the bioactivity of the cell growth factors are maintained.

[0059] Therefore, in summary, this device improves the accuracy of instrument guidance through the synergistic effect of its components, and, in conjunction with the polymer pouch 5, enhances incision repair, effectively improving the outcome of minimally invasive lumbar spine surgery and facilitating postoperative recovery for patients.

[0060] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0061] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary tool for minimally invasive lumbar spine surgery, characterized in that, Includes a base, a positioning seat, and an inner guide tube; The base is a strip-shaped plate structure used to adhere and cover the patient's incision. A groove is provided in the middle of the base, and the side of the base that is in close contact with the patient's skin is the bottom. A biodegradable polymer capsule is fitted to the bottom of the base, and the polymer capsule is filled with cell growth factors. The positioning seat is slidably installed in the slide groove, and a locking mechanism is provided between the base and the positioning seat for locking the positioning seat in any sliding position in the slide groove. An outer guide hole is provided in the middle of the positioning seat. The inner guide tube is inserted into the outer guide hole, and the inner guide tube has a hollow tube structure. One end of the inner guide tube that protrudes from the bottom of the base is provided with a puncture part.

2. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The inner walls of the two sides of the slide groove are symmetrically provided with limiting grooves, and the two sides of the positioning seat are symmetrically fixed with limiting sliding edges, which are slidably embedded in the limiting grooves.

3. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The locking mechanism includes a toothed portion disposed on the outer side of the base, and the end of the positioning seat is provided with a positioning frame extending out of the toothed portion.

4. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 3, characterized in that, The positioning frame is threaded with a stud, and a positioning toothed plate is rotatably mounted on the end of the stud.

5. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 4, characterized in that, The positioning toothed plate slides horizontally against the inner side of the positioning frame, and the side of the positioning toothed plate away from the stud engages with the toothed edge.

6. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The inner guide tube has axial graduations, and the port of the inner guide tube away from the puncture site is provided with a friction-reducing coating.

7. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The inner guide tube has several symmetrical fixing ports in the middle, and the polymer bag is snapped and fixed in the fixing ports.

8. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 7, characterized in that, A baffle is movably connected to the inner end of the fixed port. The baffle is tilted inside the inner guide tube. When the surgical instrument passes through the inner guide tube, the polymer bag is squeezed out to the tissue inside the patient's incision by squeezing open the tilted baffle.

9. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The bottom of the base is symmetrically provided with slots on both sides of the slide groove, and the polymer bag is snapped and fixed in the slots.

10. The auxiliary tool for minimally invasive lumbar spine surgery according to claim 1, characterized in that, The main component of the polymer bag is polylactic acid-hydroxyacetic acid copolymer.

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