Vertebral body dilator integrating puncture, dilation and bone cement injection
By integrating vertebral body dilatation devices with puncture, dilation, and bone cement injection functions, the problems of cumbersome procedures and high leakage rates in vertebral compression fracture surgery have been solved, achieving efficient and safe minimally invasive surgical results.
Patent Information
- Application Number
- CN202511216082.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2025-11-07
AI Technical Summary
In existing technologies, the surgical treatment of vertebral compression fractures suffers from problems such as poor balloon dilation directionality, high bone cement leakage rate, and cumbersome and time-consuming surgical procedures. In particular, traditional metal mechanical bone expanders are expensive and complex to assemble, making it difficult to meet the needs of efficient minimally invasive surgery.
A vertebral body diffuser integrating puncture, dilation, and bone cement injection is designed. It combines the functions of puncture, dilation, and bone cement injection, and adopts an inner and outer rod structure and an elastic diffuser to achieve vertebral body diffuser and bone cement injection, simplifying the surgical procedure.
It significantly reduces surgery time, alleviates patient suffering, improves surgical efficiency, simplifies procedures, reduces the risk of bone cement leakage, and enhances the safety and efficiency of surgery.
Smart Images
Figure CN120899371A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a vertebral body expander, in particular to a vertebral body expander integrating puncture, expansion and bone cement injection. BACKGROUND
[0002] Compression fractures can lead to complications such as spinal deformity, difficulty standing and walking, joint stiffness, nerve damage, and fractures in adjacent segments. Osteoporosis is a systemic bone disease caused by various reasons, the main characteristics are the decrease of bone density and bone mass, the damage of bone microstructure, the increase of bone fragility, and the formation of a state prone to fracture. The incidence of vertebral compression fractures in the spine is also increasing year by year.
[0003] Young people with spinal compression fractures are often caused by high-energy injuries such as car accidents and falls from a great height, resulting in vertebral compression fractures or burst fractures, often with nerve compression.
[0004] Old people with vertebral compression fractures are often caused by severe osteoporosis under relatively light external force. Falling, lifting heavy objects, and even coughing can cause back and chest pain, and compression fractures should be suspected.
[0005] Currently, the treatment of vertebral compression fractures is usually percutaneous kyphoplasty (PKP), but balloon expansion is completed by a pressure injection system. The directional property of balloon expansion is poor, the operation is inconvenient (the balloon expands in the direction of less resistance in the cone, the direction of expansion is difficult to control, the shape of the cavity generated is also difficult to predict, and the balloon may rupture during expansion), and the leakage rate of bone cement is still high in a low viscosity state. If the bone cement leaks into the spinal canal, it can cause paralysis; if it leaks into the blood vessels, it can cause pulmonary, renal, and cerebral embolism.
[0006] Another traditional operation is percutaneous vertebroplasty (PVP), which involves inserting a puncture needle into the vertebral body and injecting bone cement into the vertebral body. When the bone cement hardens, it can immediately stabilize the vertebral body. However, the recovery of the height of the compression fracture is not ideal.
[0007] The third is a metal mechanical bone expander, the main body is composed of a head expander, a handle, a central screw for transmitting torque, and a head with a hinge umbrella structure composed of expander plates, support arms, and a central shaft. This technology is currently used by some clinical institutions. The advantages are large expansion force, good directionality, and the ability to perceive the lifting force and actual situation through the handle damping, controlled lifting height, and no risk of balloon bag rupture. The disadvantages are complex head parts, high cost, high assembly precision requirements, and a pin hinge assembly structure that cannot withstand axial impact force, which is a potential challenge for manufacturers and researchers. SUMMARY
[0008] The present application aims to provide a vertebral body distractor integrating puncture, expansion and bone cement injection, which integrates traditional puncture expansion, vertebral body distraction and bone cement injection systems and surgical procedures, greatly reduces the operation time, reduces the pain of patients and greatly improves the efficiency of the operation.
[0009] To achieve the above object, the present application provides the following technical scheme.
[0010] The present application discloses a vertebral body distractor integrating puncture, expansion and bone cement injection, which comprises a puncture head, the tail end of the puncture head is fixedly connected to one end of an inner rod, the tail end of the puncture head is connected to one end of an elastic expansion sheet, the other end of the elastic expansion sheet is fixedly connected to one end of an outer rod, the inner rod is located inside the outer rod, a bone cement channel is formed between the inner rod and the outer rod, the elastic expansion sheet is in the shape of a strip, and a plurality of elastic expansion sheets are arranged around the inner rod, a long groove is formed between two adjacent elastic expansion sheets,
[0011] In use, after the puncture head is inserted into the corresponding position of the vertebral body, the outer rod remains stationary, the inner rod pulls back the puncture head to retract, all the elastic expansion sheets are expanded outward to form a cage, after the vertebral body is expanded, the inner rod is pushed forward to the initial position, the elastic expansion sheets return to the original state, and the bone cement is injected into the expanded vertebral body through the bone cement channel and the long groove.
[0012] Preferably, in the vertebral body distractor integrating puncture, expansion and bone cement injection, the other end of the outer rod is fixedly connected to a handle, a sealed cavity is formed in the handle, the other end of the inner rod is connected to one end of a sliding block, and the sliding block slides in the sealed cavity.
[0013] Preferably, in the vertebral body distractor integrating puncture, expansion and bone cement injection, a sealing ring is sleeved on the outer side of the sliding block, and the sealing ring is abutted against the inner wall of the sealed cavity.
[0014] Preferably, in the vertebral body distractor integrating puncture, expansion and bone cement injection, an injector is formed on one side of the handle, and the injection channel of the injector is sealingly communicated with the sealed cavity.
[0015] Preferably, in the vertebral body distractor integrating puncture, expansion and bone cement injection, the other end of the sliding block is connected to a knob, the knob protrudes to the outside of the handle, and the inner wall of the handle and the outer wall of the knob are connected by threads.
[0016] Preferably, in the vertebral body distractor integrating puncture, expansion and bone cement injection, a rotating handle is formed at the end of the knob.
[0017] Preferably, in the vertebra expander integrating puncture, expansion and bone cement injection, a rotating cavity is formed on the side of the slider close to the knob, a bolt is arranged between the knob and the slider, the rod of the bolt passes through the slider and is fixedly connected to the knob, and the head of the bolt is attached to the end wall of the rotating cavity.
[0018] Preferably, in the vertebra expander integrating puncture, expansion and bone cement injection, a perspective window is formed on the handle for observing the sealed cavity.
[0019] Compared with the prior art, the technical scheme has the advantages that the traditional puncture expansion, vertebra expansion and bone cement injection systems and surgical procedures are integrated, the surgical time is greatly reduced, the pain of the patient is reduced, and the efficiency of the surgery is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0021] Figure 1 The figure shows a schematic diagram of the vertebra expander integrating puncture, expansion and bone cement injection in the embodiment of the present application;
[0022] Figure 2 The figure shows Figure 1 the enlarged view at A in the figure;
[0023] Figure 3 The figure shows a sectional view of the vertebra expander integrating puncture, expansion and bone cement injection in the embodiment of the present application;
[0024] Figure 4 The figure shows Figure 3 the enlarged view at B in the figure;
[0025] Figure 5 The figure shows Figure 3 the enlarged view at C in the figure. DETAILED DESCRIPTION
[0026] The technical schemes in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0027] In combination Figures 1-5 As shown in the drawings, the vertebral body expander 100 integrating puncture, expansion and cement injection includes a puncture head 101, the tail end of the puncture head 101 is fixedly connected to one end of an inner rod 102, the tail end of the puncture head 101 is connected to one end of an elastic expansion sheet 103, the other end of the elastic expansion sheet 103 is fixedly connected to one end of an outer rod 104, the inner rod 102 is located inside the outer rod 104, a cement channel 105 is formed between the inner rod 102 and the outer rod 104, the elastic expansion sheet 103 is in the form of a strip and is provided with a plurality of strips around the inner rod 102, a long slot 106 is formed between two adjacent elastic expansion sheets 103,
[0028] In use, after the puncture head 101 is inserted into the corresponding position of the vertebral body, the outer rod 104 remains stationary, the inner rod 102 pulls back the puncture head 101 to retract, and all the elastic expansion sheets 103 are expanded outward to form a cage 107, after the vertebral body is expanded, the inner rod 102 is pushed forward to the initial position, and the elastic expansion sheets 103 return to the original state, and the cement is injected into the expanded vertebral body through the cement channel 105 and the long slot 106.
[0029] In this embodiment, the traditional puncture expansion, vertebral body expansion and cement injection systems and surgical procedures are integrated into one, greatly reducing the operation time, reducing the patient's pain and greatly improving the efficiency of the operation.
[0030] Further, the other end of the outer rod 104 is fixedly connected to a handle 108, a sealed cavity 109 is formed in the handle 108, the other end of the inner rod 102 is connected to one end of a sliding block 110, and the sliding block 110 slides in the sealed cavity 109.
[0031] In this embodiment, the handle is connected to facilitate operation, and the cement is injected into the cage through the sealed cavity.
[0032] Further, a sealing ring 111 is sleeved on the outside of the sliding block 110, and the sealing ring 111 is abutted against the inner wall of the sealed cavity 109.
[0033] In this embodiment, the cement is prevented from flowing backward.
[0034] Further, an injector 112 is formed on one side of the handle 108, and the injection channel 118 of the injector 112 is sealingly communicated with the sealed cavity 109.
[0035] In this embodiment, the injection of the cement is achieved.
[0036] Further, the other end of the sliding block 110 is connected to the knob 113, the knob 113 protrudes to the outside of the handle 108, and the inner wall of the handle 108 is connected to the outer wall of the knob 113 through threads.
[0037] In this embodiment, the retraction and advancement of the inner rod are driven by rotating the handle.
[0038] Further, the side of the sliding block 110 close to the knob 113 is formed with a rotating cavity 115, and a bolt 116 is arranged between the knob 113 and the sliding block 110, the rod of the bolt 116 penetrates through the sliding block 110 and is fixedly connected to the knob 113, and the head of the bolt 116 is attached to the end wall of the rotating cavity 115.
[0039] In this embodiment, when the rotating handle is rotated, the inner rod cannot be rotated, so the rotating cavity is designed to realize the advancement and retraction of the inner rod, but the inner rod cannot be rotated.
[0040] Further, the handle 108 is formed with a perspective window 117 for observing the sealed cavity 109.
[0041] In this embodiment, the injection of the bone cement can be conveniently observed.
[0042] Summary: The present application mainly comprises a knob, a handle, a head cage, and a bone cement injector, in the initial state, the head cage is in a closed state, and in the working state, the head is in a cage structure, which effectively supports the injured vertebra to restore the physiological height of the vertebra.
[0043] The elastic expansion sheet supports the vertebra, maintains the stability of the vertebra, lifts the vertebra, and restores the physiological height. The structure discards the traditional hinge assembly structure and adopts an integral cage structure, the mechanical properties are guaranteed, and factors such as assembly precision and part precision do not need to be considered. Four groups of cutting edges are designed at the tip of the head to facilitate the puncture of the vertebra and the cleaning of the channel during the establishment of the working channel. A gap is reserved between the outer rod and the inner rod, the bone cement passes through the gap, flows into the head cage, and gradually disperses and fills the surrounding space. The handle is designed with a bone cement injector, and the injector and the handle are designed as an integral type, and the interface problem when the injector is assembled with other injectors does not need to be considered.
[0044] The following is the operation steps of the present application:
[0045] 1. Preoperative preparation, disinfection, anesthesia, etc.
[0046] 2. Incise the skin of the injured vertebra to the cortical bone of the pedicle;
[0047] 3. Expand the puncture part of the skin and muscle by using a skin retractor;
[0048] 4 Using the sharp tip of the present application to puncture the pedicle cortical bone;
[0049] 5 After penetrating the cortical bone, further drill the hole to the deep part of the pedicle by rotating and puncturing, stop puncturing when reaching 1 / 4 of the distance from the posterior wall of the vertebral body under the fluoroscopy of the C-arm machine;
[0050] 6 Rotate the handle clockwise without considering the lifting direction, the head is gradually opened due to the elastic force of the bridging part, and the structure is in a cage shape, and whether the vertebral endplate is lifted to the physiological height is determined according to the fluoroscopy and the scale reading of the handle;
[0051] 7 Rotate the handle counterclockwise to the initial position, and the head bridging elastic piece returns to a flat state;
[0052] 8 Fill the prepared bone cement into the syringe for injection, and confirm the dispersion according to the scale and C-arm image;
[0053] 9 Take out the product, and process the contralateral vertebral body in the same way.
[0054] Therefore, the present application integrates the traditional puncture expansion, vertebral body distraction and bone cement injection three systems and surgical procedures into one, greatly reduces the operation time, reduces the pain of the patient, and greatly improves the efficiency of the operation. The continuous updating and iteration of intelligent medical technology and minimally invasive technology will be the future development direction, and under the support of 3D printing technology, safer and more effective medical instrument products will be born.
[0055] It should be noted that, in this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.
[0056] The above is only a specific embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection range of the present application.
Claims
1. A vertebral body spreader integrated with a puncture, dilation, and cement injection, characterized in that, The puncture head is fixedly connected with one end of the inner rod, and the tail end of the puncture head is connected with one end of the elastic expansion sheet, and the other end of the elastic expansion sheet is fixedly connected with one end of the outer rod, and the inner rod is located in the inner rod, and the bone cement channel is formed between the inner rod and the outer rod, the elastic expansion sheet is strip-shaped, and a plurality of elastic expansion sheets are arranged around the inner rod, and a long slot is formed between the adjacent two elastic expansion sheets, In use, the puncture head is inserted into the corresponding position of the vertebral body, the outer rod remains stationary, the inner rod pulls back the puncture head, and all the elastic expansion sheets are expanded outward to form a cage, after the vertebral body is expanded, the inner rod is pushed forward to the initial position, the elastic expansion sheet returns to the original state, and the bone cement is injected into the expanded vertebral body through the bone cement channel and the long slot.
2. The vertebral body impinger of claim 1, wherein: The other end of the outer rod is fixedly connected with the handle, and the handle is internally formed with a sealed cavity.
3. The set according to claim 2, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. The other end of the inner rod is connected with one end of the sliding block, and the sliding block is slidably arranged in the sealed cavity.
4. The set according to claim 2, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. The outer side of the sliding block is sleeved with a sealing ring, and the sealing ring is abutted against the inner wall of the sealed cavity.
5. The set according to claim 2, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. One side of the handle is formed with a syringe, and the injection channel of the syringe is sealingly communicated with the sealed cavity.
6. The set according to claim 5, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. The other end of the sliding block is connected with a knob, and the knob protrudes to the outside of the handle.
7. The set according to claim 5, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. The inner wall of the handle and the outer wall of the knob are connected by threads.
8. The set according to claim 2, wherein the set is a set of vertebral spreader which integrates puncture, expansion and cement injection. The end of the knob is formed with a rotating handle. The side of the sliding block close to the knob is formed with a rotating cavity, and a bolt is arranged between the knob and the sliding block, the rod of the bolt passes through the sliding block and is fixedly connected with the knob, and the head of the bolt is abutted against the end wall of the rotating cavity. The handle is formed with a perspective window for observing the sealed cavity.