A glue delivery device for neurosurgical microvascular decompression

Abstract

The utility model relates to neurosurgery technical field, concretely relates to a special glue delivery device in neurosurgery microvascular decompression. Including liquid storage bag and dropper main body who set up from front to back in proper order, liquid storage bag and dropper main body intercommunication, the dropper main body from back to front includes straight -through section, inclined section and drip section in proper order, the straight -through section with liquid storage bag coaxial arrangement, the inclined section with drip section coaxial arrangement, the axis of inclined section with the axis of straight -through section angle is 5 to 16 degrees, the inner diameter of straight -through section, inclined section and drip section reduces gradually, constitutes three -stage taper channel. The inclined angle of inclined section and straight -through section makes the instillation direction and the operator line of sight parallel, avoids the obstruction operation visual field, utilizes three -stage taper channel, controls the flow rate and flow of glue, realizes pulse type touch -on glue, avoids the misplacement of glue, satisfies the fine demand of cranial base deep operation.

Description

Technical Field

[0001] This utility model relates to the field of neurosurgical technology, specifically to a special glue delivery device for neurosurgical microvascular decompression surgery. Background Technology

[0002] Microvascular decompression (MVD) is an important surgical procedure for treating cranial nerve diseases such as trigeminal neuralgia and hemifacial spasm. Its theoretical basis can be traced back to 1934 when Walter Dandy first proposed the "vascular compression theory," but it could not be widely applied due to the limitations of the conditions at the time.

[0003] In the 1960s, with advancements in microsurgical techniques, American neurosurgeon Jannetta further refined the theory of vascular decompression and systematically proposed the concept of microvascular decompression (MVD). He employed a posterior fossa craniotomy, separating the responsible blood vessel from the compressed cranial nerve under a microscope, and implanting a Teflon pad between them to prevent direct nerve compression of the blood vessel. Jannetta's research confirmed that MVD not only effectively relieved symptoms but also offered superior long-term efficacy and fewer complications compared to neurodestructive surgery. Since then, MVD has gradually become the preferred surgical method for treating primary trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia.

[0004] In traditional MVD surgery, Teflon pads are primarily used for isolation and decompression. This method involves placing Teflon cotton or fiber pads between the blood vessel and the nerve to create a physical barrier. The advantages of Teflon decompression are its good biocompatibility and relatively simple operation. However, it carries a certain risk of displacement (postoperative displacement of the pad due to cerebrospinal fluid flow or vascular pulsation can lead to symptom recurrence), and some patients may experience foreign body reactions, leading to local inflammation or fibrosis, or even the formation of compressive granulomas, causing symptom recurrence. Based on this, our team innovatively proposed a method of simple culpable vessel relocation. Through microsurgical techniques, the culpable vessel is detached from the affected nerve to achieve decompression, and the precise application of medical adhesive is a key factor in the success of this technique.

[0005] The simple vascular repositioning method involves detaching the blood vessel from the nerve solely through microsurgical dissection, without implanting any materials. The application of medical adhesive provides crucial technical support for vascular repositioning. During the procedure, a small amount of medical adhesive is used to adhere the responsible blood vessel to the adjacent tentorial or petrous dura mater, thus repositioning the vessel and detaching it from the previously compressed nerve. This achieves complete and thorough decompression, effectively avoiding the recurrence problems caused by postoperative pad displacement or adhesion in traditional pad isolation decompression methods.

[0006] However, currently commercially available glue droppers are designed for application to the skin, and their structure is as follows: Figure 1As shown, the device includes a reservoir 1 and a straight drip tube 2. The center lines of the reservoir 1 and the drip tube 2 coincide. When this glue drip tube is used in deep skull base surgery, the surgeon's hand and the drip tube may obstruct the field of vision during vertical dripping, making it difficult for the operator to see the tip of the drip tube. This can easily lead to misplacement of glue and prolong the operation time, affecting the efficiency and quality of the operation, and making it difficult to meet the precision requirements of deep skull base surgery. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a special glue delivery device for neurosurgical microvascular decompression surgery. By using the tilt angle of the inclined section and the straight section, the drip direction is made parallel to the surgeon's line of sight, so as to avoid obstructing the surgical field of vision. By using a three-stage tapered channel, the flow rate and flow of glue are controlled to achieve pulse-type touch-controlled glue dispensing, avoid glue misplacement, and meet the precision requirements of deep skull base surgery.

[0008] To address the aforementioned technical problems, this utility model provides a specialized glue delivery device for neurosurgical microvascular decompression surgery. The device comprises a reservoir bag and a dropper body arranged sequentially from front to back, with the reservoir bag and dropper body interconnected. The dropper body, from back to front, includes a straight section, an inclined section, and a dripping section. The straight section is coaxially arranged with the reservoir bag, and the inclined section is coaxially arranged with the dripping section. The angle between the axis of the inclined section and the axis of the straight section is 5 to 16 degrees. The inner diameters of the straight section, inclined section, and dripping section decrease sequentially, forming a three-stage tapering channel.

[0009] Furthermore, the outer diameters of the straight section, the inclined section, and the dripping section gradually decrease.

[0010] Furthermore, the inner diameter of the straight section is 0.8 mm, the inner diameter of the inclined section is 0.5 mm, the inner diameter of the dripping section is 0.2 mm, and the outer diameter of the dripping section is 0.8 mm.

[0011] Furthermore, the straight section and the inclined section are rigid sections, while the dripping section is a flexible section.

[0012] Furthermore, the rigid segment has a length of 10cm, and the flexible segment has a length of 5cm.

[0013] Furthermore, the outer periphery of the liquid storage bag is provided with a thumb pressing groove and an index finger positioning protrusion.

[0014] Furthermore, the depth of the thumb pressing groove is 2mm, and the height of the index finger positioning protrusion is 0.5mm.

[0015] Furthermore, the outer circumferential surface of the liquid storage bag is provided with an anti-slip structure.

[0016] Furthermore, the liquid storage bag is a transparent bag, and a scale area is provided on the liquid storage bag, with a scale accuracy of 0.1 ml.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) By designing the main body of the dropper to include a straight section, an inclined section and a dripping section, and the angle between the axis of the inclined section and the axis of the straight section conforms to the anatomy of the skull base, the dripping direction is parallel to the surgeon's line of sight. When performing vertical dripping operations in deep skull base surgery, compared with traditional straight dripping tubes, it can effectively avoid the obstruction of the surgical field by the surgeon's hand and the dropper, allowing the operator to clearly see the tip of the dropper. It is suitable for operations in narrow spaces of the posterior fossa, reduces the risk of glue misplacement, and correspondingly shortens the operation time.

[0019] The three-stage tapering channel inside the dropper body allows for better control of the glue flow rate and volume, enabling pulse-type touch-controlled glue dispensing. This ensures more precise glue application, avoids misplacement, improves work efficiency and quality, meets the precision requirements of deep skull base surgery, and enhances the safety of MVD surgery. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a glue dropper in the existing technology.

[0021] Figure 2 This is a schematic diagram of the structure of a special glue delivery device for neurosurgical microvascular decompression surgery according to Embodiment 1 of this utility model.

[0022] Figure 3 yes Figure 2 A partial sectional view at point A in the middle.

[0023] Figure 4 yes Figure 2 Partial sectional view at point B in the middle.

[0024] Figure 5 This is a schematic diagram of the liquid storage bag in Embodiment 2 of this utility model.

[0025] Figure 6 This is a side view of the liquid storage bag in Embodiment 2 of this utility model.

[0026] In the diagram: 1. Liquid storage bag; 11. Scale area; 12. Anti-slip structure; 13. Thumb pressing groove; 14. Index finger positioning protrusion; 2. Dropper; 3. Dropper body; 31. Straight section; 32. Inclined section; 33. Dropping section. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings: Specific Implementation Example 1:

[0029] refer to Figures 2 to 4 This invention relates to a special glue delivery device for neurosurgical microvascular decompression surgery (hereinafter referred to as the glue delivery device), comprising a reservoir bag 1 and a dropper body 3 arranged sequentially from front to back. The reservoir bag 1 and the dropper body 3 are interconnected. The reservoir bag 1 stores glue. By pressing the reservoir bag 1, the glue is dripped from the front opening of the dropper body 3 to the working position. Specifically, the dropper body 3 includes a straight section 31, an inclined section 32, and a dripping section 33 arranged sequentially from back to front. The straight section 31 is coaxially arranged with the reservoir bag 1, and the inclined section 32 is coaxially arranged with the dripping section 33. The angle between the axis of the inclined section 32 and the axis of the straight section 31 is 5 to 16 degrees. The inner diameters of the straight section 31, the inclined section 32, and the dripping section 33 decrease sequentially, forming a three-stage gradually narrowing channel within the inner cavity of the dropper body 3.

[0030] In this embodiment, the angle between the axis of the inclined section 32 and the axis of the straight section 31 is 10 degrees. In other embodiments, the angle between the axis of the inclined section 32 and the axis of the straight section 31 can also be 5 degrees, 8 degrees, 15 degrees, 16 degrees, etc., with each angle corresponding to a different model. In actual use, a glue delivery device with an appropriate angle is selected according to the operational requirements.

[0031] Specifically, in this embodiment, the liquid storage bag 1 is an elastic liquid storage bag 1 made of polymer plastic material. In its natural state, it is inflated. When pressed by hand, there will be tactile feedback. Tactile feedback is generated because the liquid storage bag 1 shrinks. At the same time, the volume of the liquid storage bag 1 is designed to meet the demand each time.

[0032] Preferably, in this embodiment, the outer diameters of the straight section 31, the inclined section 32, and the dripping section 33 gradually decrease, so that the entire dripping tube body 3 can more easily penetrate into the deep surgical area of ​​the skull base, reduce interference with surrounding tissues, and facilitate operation.

[0033] Preferably, in this embodiment, the inner diameter of the straight section 31 is 0.8 mm, the inner diameter of the inclined section 32 is 0.5 mm, the inner diameter of the dripping section 33 is 0.2 mm, and the outer diameter of the dripping section 33 is 0.8 mm. Existing glue droppers typically have an inner diameter of 1 to 2 mm, which can easily lead to accidental contact with surrounding structures in the narrow cranial nerve-vascular space. Furthermore, the excessive glue flow makes precise control difficult, increasing the risk of adhesion to surrounding important structures (such as nerves and blood vessels).

[0034] The aforementioned inner diameter dimensional parameters enable precise, micro-volume glue dripping and micro-level glue release, preventing glue from spreading to non-target areas. This ensures accurate repositioning of the responsible blood vessel during surgery and improves the success rate. The outer diameter dimensional parameters of the dripping segment 33 are designed to make the tip of the dropper body 3 longer and more refined, reducing the risk of accidental contact between the dripping segment 33 and surrounding tissues and improving safety.

[0035] In other embodiments, the inner diameter of the straight section 31 may be 1 mm, the inner diameter of the inclined section 32 may be 0.6 mm, the inner diameter of the dripping section 33 may be 0.3 mm, and the outer diameter of the dripping section 33 may be 0.9 mm, 1 mm, etc.

[0036] Preferably, in this embodiment, the straight section 31 and the inclined section 32 are rigid sections made of medical-grade plastic material. The dripping section 33 is a flexible section, also made of medical-grade plastic material. The rigid section ensures the stability and directionality of the adhesive during delivery, allowing the adhesive to be accurately delivered to the target location; the flexible section allows for flexible adjustment of the dripping direction and position according to the actual needs of the surgery. In complex deep skull base surgical environments, it is easier to accurately drip the adhesive onto the adhesion site between the blood vessel and the dura mater, improving the flexibility and accuracy of the surgical operation and reducing damage to the work site.

[0037] Specifically, in this embodiment, the rigid segment can be made of polycarbonate. In other embodiments, the rigid segment can also be made of materials such as polyetheretherketone (PEEK), polyoxymethylene (POM), etc. There are many types of materials that can be selected, which will not be described in detail here.

[0038] In this embodiment, the flexible segment can be made of silicone rubber. In other embodiments, the flexible segment can also be made of thermoplastic polyurethane elastomer, ethylene-vinyl acetate copolymer, or other materials. There are many types of materials that can be selected, which will not be described in detail here.

[0039] Preferably, in this embodiment, the entire dropper body 3 is 15cm long, with a rigid section of 10cm and a flexible section of 5cm. The effective working length of the entire dropper body 3 is extended to 15cm, effectively matching the depth requirements of skull base surgery. In other embodiments, the rigid section can be 9cm long and the flexible section 6cm long, or the rigid section can be 10cm long and the flexible section 6cm long. The specific lengths of the rigid and flexible sections can be set according to actual needs, as long as they can effectively reach the working area and reduce the risk of accidental contact with tissue.

[0040] Preferably, in this embodiment, the fluid storage bag 1 is a transparent bag made of a transparent material, and a graduated area 11 is provided on the fluid storage bag 1, with a graduation accuracy of 0.1 ml. This allows the operator to visually observe the amount of glue used, ensuring surgical precision. Specifically, in this embodiment, the fluid storage bag 1 is made of polyethylene (PE) plastic material. In other embodiments, depending on actual needs, other flexible plastic materials can also be selected to make the fluid storage bag 1, which will not be exemplified here.

[0041] The following drawbacks often exist when using traditional droppers for surgical procedures:

[0042] (1) The traditional dropper is 6cm long, while the surgical area is generally 10-12cm deep.

[0043] (2) The outer diameter of the traditional drip tube 2 is relatively large at 2mm, which can easily lead to an increase in the field of vision obstruction rate by 43%.

[0044] (3) Vertical dripping causes a blind spot in the surgical field for 15-25 seconds per drip.

[0045] The procedure for using the glue delivery device of this invention for trigeminal nerve decompression via the retrosigmoid approach is as follows:

[0046] Step 1: Insert the retractor to create an 8mm channel.

[0047] Step 2: Select a glue delivery device with a suitable tilt angle for the dropper body 3.

[0048] Step 3: Extend the flexible section into the working position.

[0049] Step 4: Single-handed control output of 3μl cyanoacrylate

[0050] Step 5: The blood vessel displacement reaches 1.2mm, the curing time is 18 seconds, and the surgical procedure is completed.

[0051] In facial nerve decompression surgery, actual clinical testing and statistics show that, compared with traditional droppers, the glue delivery device of this application reduces the operation time from 55 seconds to 33 seconds, a reduction of 40%. The glue diffusion area is also reduced from 4.2 mm. 2 Reduced to 1.2mm 2 The diffusion area was reduced by 72%. The number of instrument collisions decreased from 3.8 per case to 0.2 per case, effectively reducing instrument collisions.

[0052] In summary, the glue delivery device of this invention, by designing the dropper body 3 to include a straight section 31, an inclined section 32, and a dripping section 33, and with the angle between the axis of the inclined section 32 and the axis of the straight section 31 conforming to the skull base anatomy, makes the dripping direction parallel to the surgeon's line of sight. When performing vertical dripping operations in deep skull base surgery, compared with the traditional straight dripping tube 2, it can effectively avoid the obstruction of the surgical field by the surgeon's hand and the dropper, allowing the operator to clearly see the tip of the dropper. It is suitable for operations in narrow spaces of the posterior fossa, reduces the risk of glue misplacement, and correspondingly shortens the operation time.

[0053] The three-stage tapering channel inside the dropper body 3 can better control the flow rate and volume of the glue, realize pulse-type touch-controlled glue dispensing, make the glue drip more accurately, improve work efficiency and quality, meet the precision requirements of deep skull base surgery, and improve the safety of MVD surgery.

[0054] This novel glue delivery device, with its 15cm working length, 0.2mm microporous structure, and curved design conforming to skull base anatomy, combined with a pulse-controlled glue dispensing mechanism, achieves precise single-dose delivery of 0.5-5μl of glue in a surgical field 8-10cm deep. Clinical trials show that it can shorten vascular fixation time to within 20 seconds and reduce the glue misplacement rate from 17.3% to 1.2%, significantly improving the safety of MVD surgery.

[0055] Example 2: This example provides a different liquid storage bag 1. Unlike Example 1, in this example, as shown... Figure 5 , 6 As shown, the outer periphery of the liquid storage bag 1 is provided with a thumb pressing groove 13 and an index finger positioning protrusion 14. The thumb pressing groove 13 and the index finger positioning protrusion 14 correspond to the thumb and index finger positions of the surgeon, respectively, optimizing the grip experience, facilitating control of the liquid storage bag 1, and achieving stable and accurate delivery of the glue.

[0056] Specifically, in this embodiment, the depth of the thumb pressing groove 13 is 2mm, and the height of the index finger positioning protrusion 14 is 0.5mm.

[0057] Preferably, an anti-slip structure 12 is provided on the outer peripheral surface of the fluid storage bag 1. Specifically, the anti-slip structure 12 is a dotted anti-slip pattern on the peripheral surface of the fluid storage bag 1, which avoids the scale area 11. This ensures a firm grip on the fluid storage bag 1, preventing it from slipping off due to slippage or operational errors, and improving the safety and stability of the surgical procedure. In other embodiments, the anti-slip structure 12 may also be multiple anti-slip grooves.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0059] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

Claims

1. A glue delivery device for use in neurosurgical microvascular decompression, characterized in that, The device includes a liquid storage bag and a dropper body arranged sequentially from front to back. The liquid storage bag and the dropper body are interconnected. The dropper body includes a straight section, an inclined section and a dripping section from back to front. The straight section is coaxially arranged with the liquid storage bag, and the inclined section is coaxially arranged with the dripping section. The angle between the axis of the inclined section and the axis of the straight section is 5 to 16 degrees. The inner diameters of the straight section, the inclined section and the dripping section decrease sequentially, forming a three-stage tapering channel.

2. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 1, wherein, The outer diameters of the straight section, inclined section, and dripping section gradually decrease.

3. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 1, wherein, The inner diameter of the straight section is 0.8 mm, the inner diameter of the inclined section is 0.5 mm, the inner diameter of the dripping section is 0.2 mm, and the outer diameter of the dripping section is 0.8 mm.

4. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 1, wherein, The straight section and the inclined section are rigid sections, while the dripping section is a flexible section.

5. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 4, wherein, The rigid section has a length of 10cm, and the flexible section has a length of 5cm.

6. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 1, wherein, The outer periphery of the liquid storage bag is provided with a thumb pressing groove and an index finger positioning protrusion.

7. The neurosurgery microvascular decompression procedure specific glue delivery device of claim 6, wherein, The depth of the thumb pressing groove is 2mm, and the height of the index finger positioning protrusion is 0.5mm.

8. The neurosurgery microvascular decompression surgery specific glue delivery device according to claim 1, wherein, The outer circumference of the liquid storage bag is provided with an anti-slip structure.

9. The neurosurgery microvascular decompression surgery specific glue delivery device as claimed in claim 1, wherein, The liquid storage bag is a transparent bag, and a scale area is provided on the liquid storage bag, with a scale accuracy of 0.1 ml.

Images