Novel BBX intervertebral disc reamer
By designing a U-shaped blade that matches the lumbar intervertebral space, the BBX novel intervertebral disc retractor solves the problems of nerve root damage, insufficient mechanical strength, and incomplete cleaning associated with traditional intervertebral disc retractors, achieving safe, robust, and low-cost surgical results.
Patent Information
- Application Number
- CN202520268627.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Traditional disc reamers are prone to damaging nerve roots during surgery, lack mechanical strength, have difficulty entering narrow intervertebral spaces, and do not completely clean the discs. They are also costly and cannot meet the needs of modern intervertebral fusion surgery.
A novel BBX intervertebral disc reamer was designed, featuring a U-shaped blade that matches the lumbar intervertebral space to avoid nerve root damage and enhance mechanical strength. The U-shaped groove and bevel structure facilitate access to and cleaning of intervertebral disc tissue. The fixed handle increases operational stability, and the blade can be sharpened to maintain its sharpness.
This approach achieves surgical results that are highly safe, have high mechanical strength, provide thorough cleaning, and are cost-effective, reducing nerve root damage and surgical difficulty, and improving surgical efficiency and safety.
Smart Images
Figure CN223614889U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to a new type of BBX intervertebral disc retractor, which is a surgical instrument suitable for small open incisions to thoroughly remove intervertebral disc tissue. Background Technology
[0002] Lumbar degenerative diseases are a very common strain-related disease in middle-aged and elderly people. Surgical treatment generally requires intervertebral fusion. Quick and effective removal of intervertebral disc tissue is fundamental to the success of intervertebral fusion. Currently, the commonly used traditional intervertebral disc reamer is rectangular, 1cm wide, with a square tip, a hollow center, sharp edges on both sides, and a long cylindrical handle. During open small-incision surgery, after removing the lamina and the herniated disc tissue within the spinal canal, to thoroughly remove the intervertebral tissue and endplate cartilage, the intervertebral disc reamer should first be inserted into the intervertebral space. Internally, it is necessary to pull the nerve root, which can easily cause irreversible damage to the nerve root; when the reamer enters the intervertebral space, the nerve root can be easily cut when one side of the blade comes into contact with it, which can also cause irreversible damage; due to the narrowing of the intervertebral space and the calcification of the endplate, the square reamer head has greater resistance, which is not conducive to entering the narrow intervertebral space; when removing the intervertebral tissue, the mechanical strength of the hollowed-out reamer is greatly reduced, and it is easy to break under great stress; its columnar handle has poor holding force and torsional force, which makes it difficult to remove the intervertebral disc tissue and endplate.
[0003] The interbody retractor required for interbody fusion surgery should have the following advantages:
[0004] (1) High safety performance: Minimal interference with nerve roots when entering the intervertebral space. It is best to avoid traction and mechanical cutting of nerve roots, minimizing interference with nerve roots and avoiding damage to nerve roots.
[0005] (2) High mechanical strength: Compared with traditional intervertebral disc reamers, it is easier to enter the intervertebral space and remove intervertebral disc tissue and endplate cartilage. It has high mechanical strength, can apply force, is not easy to break, and reduces the difficulty of surgery.
[0006] (3) Thoroughness of cleaning: The blade of the reamer must be sharp but not damage the intervertebral endplate, and be of appropriate size to quickly clean the intervertebral disc tissue.
[0007] (4) Low cost: Medical stainless steel is used, can be reused, the blade can be sharpened, and the price is low.
[0008] Therefore, traditional disc retractor surgical instruments cannot meet the current surgical needs, and the original structure cannot meet the requirements of current surgery. Summary of the Invention
[0009] To overcome the technical problems existing in the traditional intervertebral disc reamers, the purpose of this utility model is to provide a new type of BBX intervertebral disc reamer.
[0010] To achieve the above objectives, this utility model adopts the following technical solution:
[0011] A novel BBX intervertebral disc reamer has a U-shaped cutter head located at one end of a solid connecting rod and matching the lumbar intervertebral space. The upper end face of the U-shaped cutter head has a U-shaped groove extending through the length of the U-shaped cutter head. The top surfaces of the two side walls of the U-shaped groove form cutting edges. The lower end face of the U-shaped cutter head is flat. The front end of the U-shaped cutter head has an inclined surface that slopes forward and downward from the two cutting edges of the U-shaped groove. The inclined surface is spindle-shaped. The rear end of the U-shaped cutter head, i.e., the end connected to the solid connecting rod, has a drainage groove communicating with the U-shaped groove.
[0012] The drainage groove is a pointed shape extending from the U-shaped cutter head to the solid connecting rod.
[0013] The other end of the solid connecting rod is connected to a fixed handle that is perpendicular to the solid connecting rod; the fixed handle is a hollow structure.
[0014] The outer wall surface of the fixed handle is provided with a knurled pattern.
[0015] This invention proposes a novel BBX intervertebral disc reamer. The U-shaped blade is matched to the sagittal diameter of the lumbar intervertebral space, avoiding the excessive length of traditional reamers. During operation, it avoids protruding from the anterior annulus fibrosus of the intervertebral space, preventing damage to major anterior blood vessels and avoiding massive bleeding that could lead to patient death. The anterior bevel is fusiform, facilitating access to the nucleus pulposus within the intervertebral space. The posterior bevel enters the intervertebral space without damaging the dural sac or nerve roots within the spinal canal. The width of the U-shaped blade is comparable to the width of the intervertebral fusion device, facilitating its implantation. The height of the U-shaped blade matches the intervertebral space, avoiding damage to the intervertebral endplate bone. The U-groove design avoids the hollow structure of traditional reamers, greatly enhancing the strength of the blade and preventing breakage due to excessive force during operation. The U-groove blade can thoroughly remove the nucleus pulposus and endplate cartilage from the intervertebral space, reducing operation time and preventing incomplete cleaning that could lead to poor intervertebral fusion and internal fixation failure. The blade can be sharpened to ensure permanent sharpness, and the U-groove also facilitates the leakage of intervertebral tissue.
[0016] In summary, the overall design of this utility model can protect against nerve damage, thoroughly and quickly remove intervertebral disc tissue; it is sturdy and durable, easy to operate, reduces surgical damage, and is low in cost. Moreover, the reamer is ingeniously designed, simple in structure, and sturdy and durable. It is suitable for surgical procedures that thoroughly remove intervertebral disc tissue, is easy to use and operate, and is suitable for large-scale promotion and application. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 This is a schematic diagram of the structure of the U-shaped cutter head of this utility model.
[0019] Figure 3 This is a cross-sectional view of the U-shaped cutter head of this utility model.
[0020] In the diagram: 1. U-shaped cutter head, 1-1. U-shaped groove, 1-2. Cutting edge, 1-3. Bevel, 1-4. Flat surface, 1-5. Drainage groove; 2. Solid connecting rod, 3. Fixed handle. Detailed Implementation
[0021] The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
[0022] like Figure 1 As shown, a novel BBX intervertebral disc reamer has a U-shaped cutter head 1 located at one end of a solid connecting rod 2 and matched with the lumbar intervertebral space; combined with... Figure 2 , Figure 3 The upper end face of the U-shaped cutter head 1 has a U-shaped groove 1-1 extending through the length of the U-shaped cutter head; the top surface of the two side walls 1-1 of the U-shaped groove forms a cutting edge 1-2; the lower end face of the U-shaped cutter head is a plane 1-4; the front end of the U-shaped cutter head has an inclined surface 1-3 that slopes forward and downward from the two cutting edges of the U-shaped groove; the inclined surface 1-3 is spindle-shaped; the rear end of the U-shaped cutter head, i.e. the end connected to the solid connecting rod, has a drainage groove 1-5 that communicates with the U-shaped groove.
[0023] The drainage grooves 1-5 are pointed-angle shapes extending from the U-shaped cutter head to the solid connecting rod side.
[0024] The other end of the solid connecting rod is connected to a fixed handle 3 that is perpendicular to the solid connecting rod; the fixed handle 3 is a hollow structure.
[0025] The outer wall surface of the fixed handle 3 is provided with a knurled pattern.
[0026] The hollow cylindrical handle design reduces the overall weight of the instrument. The handle surface has a knurled pattern, and its diameter and length are suitable for comfortable operation. The knurling increases the friction between the handle and the hand, and its perpendicularity to the central connecting rod ensures a more stable grip, preventing slippage and enhancing the force applied during operation. The solid connecting rod is cylindrical, with a suitable thickness and length, and is very sturdy. It connects to the fixed handle, transmitting the force from the handle to the U-shaped blade. The U-shaped blade has a rhomboid structure with a U-shaped groove on one side and a sharp blade on the bottom edge. The length of the rhomboid U-shaped blade matches the sagittal diameter of the intervertebral space, avoiding the excessive length of traditional reamers. During operation, it will not protrude from the anterior annulus fibrosus of the intervertebral space, damaging the anterior large blood vessels and preventing massive bleeding that could lead to patient death. The anterior bevel is spindle-shaped, facilitating entry into the nucleus pulposus tissue of the intervertebral space, while the posterior bevel enters the intervertebral space without skewing the dura mater sac or nerve roots within the spinal canal. The width of the rhomboid body is similar to that of the intervertebral fusion cage, which facilitates the implantation of the cage. The height of the rhomboid body matches the intervertebral space, avoiding damage to the intervertebral endplate bone. The U-groove design avoids the hollow structure of traditional reamers. The solid structure on one side greatly enhances the strength of the reamer head, preventing the head from breaking due to excessive force during operation. The blade can thoroughly remove the nucleus pulposus tissue and endplate cartilage from the intervertebral space, reducing operation time and avoiding poor intervertebral fusion and internal fixation failure due to incomplete cleaning. The blade can be sharpened to ensure permanent sharpness, and the U-groove also facilitates the leakage of intervertebral tissue.
Claims
1. A novel BBX interconical disc reamer, characterized in that: The intervertebral disc reamer has a U-shaped cutter head located at one end of a solid connecting rod and matching the lumbar intervertebral space; the upper end face of the U-shaped cutter head has a U-shaped groove extending through the length of the U-shaped cutter head; the top surfaces of the two side walls of the U-shaped groove form cutting edges; the lower end face of the U-shaped cutter head is flat; the front end of the U-shaped cutter head has an inclined surface that slopes forward and downward from the two cutting edges of the U-shaped groove; the inclined surface is spindle-shaped; the rear end of the U-shaped cutter head, i.e., the end connected to the solid connecting rod, has a drainage groove communicating with the U-shaped groove.
2. The BBX novel interconical disc reamer as described in claim 1, characterized in that: The drainage groove is a pointed shape extending from the U-shaped cutter head to the solid connecting rod.
3. The BBX novel interconical disc reamer as described in claim 1, characterized in that: The other end of the solid connecting rod is connected to a fixed handle that is perpendicular to the solid connecting rod; the fixed handle is a hollow structure.
4. The BBX novel interconical disc reamer as described in claim 3, characterized in that: The outer wall surface of the fixed handle is provided with a knurled pattern.