Medical counter device and method of use

Abstract

The invention relates to the technical field of medical instruments, and discloses a medical counter device and a use method, and the counter device comprises an operating rod, a counter, a driver and an implant. The operating rod penetrates through the counter and is connected with the interior of the driver, and the counter is provided with a linkage mechanism and a scale indication mechanism and is used for displaying the opening height of the implant in real time. The linkage mechanism is driven by rotation of the operating rod, and the scale indicating mechanism synchronously moves in the axial direction of the operating rod. The opening height of the implant can be adjusted through forward rotation or reverse rotation of the operating rod. The counter has an accurate scale identification range and is used for feeding back the opening height. The implant is of a telescopic structure, and the distraction state of the implant is displayed in real time through a scale indicating mechanism of the counter. The using method comprises the steps of assembling the operating rod and the counter, locking the driver and the implant, implanting the implant, rotating the operating rod to adjust the distraction height, and conducting real-time monitoring through the scale indicating mechanism, and the device is suitable for a medical operation needing to accurately control the distraction height of the implant.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to a medical counter device, and also to a method for using the medical counter device. Background Art

[0002] In the field of medical surgery, especially in spinal surgery, implants such as fusion cages are often needed to stabilize the spine or promote fusion between vertebrae. After implantation, such implants often need to reach a certain expansion height between vertebrae to ensure the success of the operation and the patient's recovery. However, in traditional surgical procedures, doctors often rely on experience and feel to adjust the expansion height of the implant, which not only increases the uncertainty of the operation, but may also lead to inaccurate expansion height, thus affecting the effect of the operation.

[0003] In order to solve this problem, some medical devices that can measure and adjust the expansion height of implants have appeared on the market, but these devices are often complex in structure, inconvenient to operate, and have limited accuracy. Therefore, the development of a medical counter device with simple structure, convenient operation and high accuracy has become an urgent problem to be solved in the industry.

[0004] Most existing counters use mechanical or electronic measurement principles, but mechanical counters often have problems such as low accuracy and easy damage, while electronic counters may be affected by the surgical environment (such as electromagnetic interference, blood, etc.), resulting in inaccurate measurement or failure. In addition, when used in conjunction with implants, existing counters often have problems such as complex assembly and difficult operation.

[0005] In view of the above-mentioned deficiencies in the prior art, it is necessary to develop a medical counter device which has a simple structure, is easy to operate and can accurately display the expansion height of the implant in real time. Summary of the invention

[0006] The purpose of the present invention is to provide a medical counter device that can display the expansion height of the implant in real time, helping doctors to accurately control the expansion state of the implant during surgery and avoid medical accidents caused by improper expansion height. Through the counter, doctors can monitor the expansion height of the implant in real time during surgery to ensure the accuracy and safety of the surgery.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The invention discloses a medical counter device, comprising an operating rod, a counter, an implant and an implant.

[0009] An operating handle is arranged at one end of the operating rod, and the other end passes through the counter, and the terminal end extends into the interior of the driver.

[0010] The counter comprises a linkage mechanism and a scale indicating mechanism, wherein the linkage mechanism is driven by the rotation of the operating rod, and the scale indicating mechanism can synchronously move along the axial direction of the operating rod to display the expansion height of the implant in real time.

[0011] The driver is connected to one end of the counter, and a connector is provided at the end of the driver for detachably connecting with the implant.

[0012] The expansion height of the implant is adjusted by rotating the operating lever in the positive or negative direction.

[0013] In addition to the above technical features, the present invention has also made optimization and improvements in the following aspects:

[0014] As a preferred technical solution of the present application, the linkage mechanism includes an inner screw and a guide sleeve;

[0015] A screw adjusting block is fixed at one end of the inner screw, and a nut connected to the driver is provided at the other end;

[0016] The center of the inner screw is provided with an axial through hole, and the operating rod passes through the through hole and is threadedly connected to the connector of the driver;

[0017] The guide sleeve is sleeved on the outside of the inner screw, and a guide groove is opened on the surface of the guide sleeve along the axial direction. A scale mark is arranged beside the guide groove.

[0018] As a preferred technical solution of the present application, the scale indicating mechanism includes a sliding sleeve and a display pin;

[0019] The sliding sleeve is sleeved on the inner screw and is threadably connected to the inner screw;

[0020] One end of the display pin is fixed to the sliding sleeve, and the other end extends into the guide groove, and can slide along the guide groove and point to the scale mark.

[0021] As a preferred technical solution of the present application, the screw adjustment block is a columnar structure, and a mounting groove is radially provided therein;

[0022] A threaded connection block is fixed in the installation groove, and a semi-threaded hole is provided on the threaded connection block;

[0023] An external threaded sleeve is provided at one end of the operating rod close to the operating handle and can move forward and backward along the operating rod, and the external threaded sleeve is engaged with the semi-threaded hole of the threaded connection block;

[0024] The inner screw is driven to rotate by rotating the operating handle, thereby driving the sliding sleeve and the display pin to move along the guide groove.

[0025] As a preferred technical solution of the present application, the operating rod is detachably connected to the counter, and the operating handle is engaged with the threaded connection block through an external threaded sleeve to achieve torque transmission, so that the operating rod moves forward and backward to adjust the expansion height of the implant.

[0026] As a preferred technical solution of the present application, the moving distance of the display pin is in linear proportion to the expansion height of the implant, which is used to accurately feedback the expansion height, and the implant is provided with a gripping handle for operating the implantation process. The implant is a retractable structure, and its expansion height is displayed in real time through the scale mark of the counter, and the maximum expansion height is 10 mm.

[0027] As a preferred technical solution of the present application, the display pin of the scale indicating mechanism of the counter moves axially, and its moving distance is proportional to the expansion height of the implant, so as to accurately display the expansion state of the implant.

[0028] As a preferred technical solution of the present application, the implant has an expanded state and a non-expanded state, and the expanded height is displayed by a scale indicating mechanism of a counter, which is used to adjust the expanded height of the implant according to surgical requirements.

[0029] As a preferred technical solution of the present application, the scale indicating mechanism of the counter is provided with scale lines from 0 to 10 mm; the expansion height adjustment range of the implant is 0 to 10 mm, which matches the scale setting range of the scale indicating mechanism.

[0030] On the other hand, the present application also provides a method for using a medical counter device, comprising the following steps:

[0031] Assemble the operating rod and the counter through the threaded connection block and the external thread sleeve;

[0032] Lock the connector of the driver with the implant;

[0033] The implant is inserted into the intervertebral disc through the gripping handle of the driver;

[0034] Rotate the operating handle to drive the inner screw to rotate and adjust the expansion height of the implant;

[0035] The expansion height can be monitored in real time by means of a scale marking indicating the direction of the display pin.

[0036] Combined with the description of the above technical content, the medical counter device of the present invention solves the problem that the height adjustment in the traditional intervertebral disc implantation surgery relies on experience judgment, the operation is cumbersome and the precision is insufficient through the deep integration of mechanical transmission and visual feedback. The technical effects are specifically reflected in the following aspects:

[0037] 1. Accurately control the opening height:

[0038] The present application realizes the integration of height adjustment and real-time feedback functions through the integrated design of the linkage mechanism (inner screw and guide sleeve) and the scale indication mechanism (sliding sleeve and display pin).

[0039] The linear movement of the display pin along the guide groove is directly related to the implant expansion height. The doctor can quickly understand the implant status through the intuitive scale marking (0-10 mm).

[0040] The combination of the operating rod and the counter enables the doctor to accurately control the expansion height of the implant, ensuring high accuracy during the operation.

[0041] 2. Precise control and real-time feedback:

[0042] The thread matching design of the inner screw and the sleeve, combined with the limit guidance of the display pin and the guide groove, realizes a linear proportional relationship between the implant expansion height and the scale mark, with an error range of less than 1 mm.

[0043] The meshing structure of the screw adjustment block and the external threaded sleeve directly drives the internal screw to rotate by rotating the operating handle, thus avoiding the transmission hysteresis problem of traditional instruments.

[0044] The moving position of the indicator pin of the scale indicator mechanism corresponds one-to-one with the scale, so the doctor can intuitively see the exact height of the implant in the human body, which improves the operability and accuracy of the operation.

[0045] 3. Modular and detachable design:

[0046] The operating rod, counter and injector are detachably connected to facilitate quick assembly, replacement or disinfection during surgery, thus improving the reusability and operational flexibility of the instrument.

[0047] The gripping handle and connector design of the implant enhance the stability of the implant during implantation and avoid positioning deviation caused by operational jitter.

[0048] 4. Meet personalized surgical needs:

[0049] The scale indicating mechanism of the counter is provided with a scale range of 0 to 10 mm, which matches the expansion height adjustment range of the implant.

[0050] Doctors can flexibly adjust the expansion height of the implant according to the specific situation and surgical needs of each patient, meeting the needs of personalized surgery.

[0051] The implant's retractable structure and strict matching of its expansion state with the scale markings ensure that the doctor can accurately adjust the height according to the patient's anatomical structure, avoiding the risk of nerve compression caused by over-expansion.

[0052] 5. Improve the success rate of surgery and simplify the surgical process:

[0053] Because the counter is highly accurate and operable, doctors can operate more safely during surgery, thereby improving the success rate of the operation.

[0054] Precise distraction height control helps reduce surgical complications and postoperative discomfort.

[0055] The counter has a simple structure and is easy to operate, making the surgical process more concise and efficient, saving surgical time and improving surgical efficiency.

[0056] In summary, the medical counter device of the present invention has demonstrated significant technical effects in spinal surgery. It not only improves the accuracy and operability of the surgery, but also meets the needs of personalized surgery, improves the success rate of the surgery, and simplifies the surgical process, providing a strong guarantee for the success of spinal surgery and the recovery of patients.

[0057] In summary, the present invention achieves precise control of the distraction height during intervertebral disc implantation surgery, significantly reduces intraoperative radiation exposure, efficiently simplifies the surgical process, and fully covers personalized needs through the innovative combination of mechanical precision transmission, real-time visual feedback, and modular design. Its technical effects are directly transformed into clinical advantages: improving the success rate of surgery, reducing the rate of postoperative complications, and providing doctors with a safe, intuitive, and reliable operating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a longitudinal sectional view of the present invention;

[0059] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0060] Figure 3 It is a schematic diagram of the structure of a counter of the present invention;

[0061] Figure 4 is a schematic structural diagram of a counter in a third embodiment of the present invention;

[0062] Figure 5 It is a structural schematic diagram of the guide sleeve of the present invention;

[0063] Figure 6 It is a schematic structural diagram of the internal screw of the present invention;

[0064] Figure 7 It is a structural schematic diagram of the threaded connection block of the present invention;

[0065] Figure 8 It is a schematic structural diagram of the third embodiment of the present invention.

[0066] In the figure: 1. operating lever; 2. counter; 201. guide sleeve; 211. guide groove; 202. nut; 203. threaded connection block; 213. semi-threaded hole; 204. screw adjustment block; 214. mounting groove; 205. sliding sleeve; 206. display pin; 207. inner screw; 3. inserter; 31. gripping handle; 32. connector; 4. implant; 5. introduction screw; 51. outer threaded sleeve. DETAILED DESCRIPTION

[0067] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0068] 1. Explanation of Descriptive Terms in the Present Invention

[0069] The embodiments of the present invention in combination with the technical solutions are intended to make the present invention more thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically described in the present invention, the relative arrangement of the components described in these embodiments should be interpreted as merely exemplary, rather than as a limitation to the technical solutions of the present invention.

[0070] If the present invention involves the use of directional terms such as "upper", "lower", "left", "right", "bottom", "top", etc., they are defined relative to the directions in the respective drawings and are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be understood as restrictive terms.

[0071] In the present invention, the words "a", "an", "a", "the" and the like do not indicate a quantity limitation and may indicate the singular or plural. The terms "include", "comprises", "has" and any variations thereof involved in the present invention are intended to cover non-exclusive inclusions; if the present invention involves the terms "first", "second", "third", etc., they are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0072] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0073] In addition, the present invention does not discuss in detail the technologies and equipment known to ordinary technicians in the relevant fields, but where appropriate, the technologies and equipment should be considered as part of the specification.

[0074] 2. Core technical issues to be solved by the technical solution of this application

[0075] The prior art has obvious deficiencies in the field of medical surgery, especially in the measurement and adjustment of the expansion height of implants used in spinal surgery. Traditional methods rely on the doctor's experience and hand feel, which increases the uncertainty of the operation and may lead to inaccurate expansion height, affecting the surgical effect. Although some medical devices for measuring and adjusting the expansion height have appeared on the market, these devices have complex structures, inconvenient operation, and limited accuracy. Mechanical counters have problems of low accuracy and easy damage, while electronic counters may be affected by the surgical environment (such as electromagnetic interference, blood), resulting in inaccurate measurements or failures. At the same time, when the existing counters are used in conjunction with implants, the assembly process is complicated and the operation is difficult. Therefore, the industry urgently needs to develop a medical counter device with a simple structure, easy operation, and the ability to accurately display the expansion height of the implant in real time, so as to improve the accuracy and success rate of surgery and promote patient recovery.

[0076] 3. Based on the above problems, the present invention specifically provides a technical solution to the above problems. The technical solution, working principle and technical effects of the present invention are described in detail below in conjunction with specific embodiments.

[0077] Embodiment 1

[0078] (I) Please refer to Figure 1 , Figure 2 As shown, a medical counter device mainly includes an operating rod assembly, a counter assembly, an implant assembly and an implant assembly.

[0079] 1. Operating lever assembly

[0080] Operating rod: Made of 304 stainless steel, 300mm long, 50mm in diameter, with high rigidity and bending strength.

[0081] Operating handle: Located at one end of the operating rod, made of non-slip rubber with knurled pattern on the surface, with a grip diameter of 30mm and capable of transmitting a torque ≥5N·m.

[0082] External thread sleeve: It is located at the other end of the operating rod, with an outer diameter of 6mm and a pitch of 1mm, and is engaged with the semi-threaded hole 213 of the threaded connection block 203 of the counter assembly to achieve detachable assembly.

[0083] 2. Counter component

[0084] like Figure 3 , Figure 5 , Figure 6 , Figure 7 As shown, the counter assembly includes a linkage mechanism and a scale indicating mechanism.

[0085] Linkage organizations:

[0086] Internal screw 207: Made of titanium alloy TC4, length 150mm, outer diameter 8mm, surface processed with trapezoidal thread with pitch 2mm, transmission efficiency ≥90%.

[0087] A screw adjusting block 204 is fixed to one end of the inner screw 207, and a nut 202 connected to the driver 3 is provided at the other end;

[0088] An axial through hole is provided at the center of the inner screw rod 207 , and the operating rod 1 passes through the through hole and is threadedly connected to the connecting head 32 of the driver 3 .

[0089] The screw rod adjusting block 204 is a columnar structure, and is radially provided with a mounting groove 214 , which is configured as a square mounting groove.

[0090] A threaded connection block 203 is fixed in the installation groove 214 . The threaded connection block 203 is configured to be a square that matches the square installation groove. A semi-threaded hole 213 is provided on the threaded connection block 203 .

[0091] The end of the operating rod 1 close to the operating handle is provided with an external threaded sleeve 51, which is engaged with the semi-threaded hole 213 of the threaded connection block 203. The inner screw 207 is driven to rotate by rotating the operating handle, driving the sliding sleeve 205 and the display pin 206 to move along the guide groove 211.

[0092] Guide sleeve 201: made of transparent polycarbonate, with a wall thickness of 2mm, sleeved on the outside of the inner screw, with an axial guide groove 211 with a width of 3mm, and a 0-50mm scale printed next to the groove (the minimum division value is 1mm).

[0093] Nut 202: It is arranged at the end of the inner screw and is locked with the driver connector 32 through threads.

[0094] Scale indicating mechanism:

[0095] Sleeve 205: H62 copper sleeve, inner diameter 8mm, matched with the inner screw thread, axial movement stroke 50mm.

[0096] Display pin 206: a stainless steel needle with a diameter of 1 mm, one end of which is welded to the sliding sleeve and the other end extends into the guide groove 211. The end is coated with a red fluorescent coating (wavelength 620 nm), and the intraoperative visible distance is ≥500 mm.

[0097] 3. Driver assembly 3

[0098] Main structure: 6061 aluminum alloy, the front end connector 32 is titanium alloy TC4, with a diameter of 10 mm, and is locked with the implant 4 by a spring buckle (the buckle unlocking force is ≥15N).

[0099] Grip handle 31: Made of silicone, 80mm long, with diamond-shaped anti-slip protrusions on the surface, and a grip angle of 15°, which is ergonomic.

[0100] 4. Implant component 4

[0101] Material and structure: Nickel-titanium alloy (NiTi, phase transition temperature 25°C) retractable bracket, initial height 5mm, maximum expansion height 50mm, expansion force 200N, elastic modulus 60GPa.

[0102] Connection interface: A buckle groove (depth 2mm) is provided at the tail to match the driver connector (32).

[0103] (II) Operation process

[0104] 1. Preoperative assembly:

[0105] The external threaded sleeve 51 of the operating rod 1 is screwed into the semi-threaded hole 213 of the threaded connection block 203 and rotated 3 times until it is engaged and locked (torque 2 N·m).

[0106] Press the buckle spring of the connector 32 of the driver, align and lock the buckle groove at the tail of the implant 4, and hear a "click" sound to confirm the connection.

[0107] 2. Implant placement:

[0108] The doctor holds the gripping handle 31 and pushes the implant 4 into the target position along the axis of the intervertebral space. During the operation, the C-arm lateral fluoroscopy confirms that the initial positioning error is ≤ 2 mm.

[0109] 3. Height adjustment:

[0110] The operating handle is rotated clockwise to drive the inner screw 207 to rotate 1 circle (360°), and the sleeve 205 moves axially by 2mm (pitch 2mm), and the display pin 206 moves synchronously in the guide groove 211, and the scale reading accuracy is ±0.5mm.

[0111] When the display pin points to the scale "35mm", the actual expansion height of the implant is 35±0.8mm (measured data), which meets the requirements for restoring the intervertebral disc height of the L4-L5 segment.

[0112] 4. Intraoperative fine-tuning:

[0113] If the height needs to be reduced, rotate the operating handle counterclockwise half a turn (180°), the sleeve moves in the opposite direction by 1mm, and the implant height is linearly reduced by 1mm to achieve fine adjustment.

[0114] 5. Postoperative treatment:

[0115] The operating rod 1 is rotated in the reverse direction to release the engagement between the external thread sleeve 51 and the threaded connection block 203 .

[0116] The release button of the connector 32 is pressed to remove the implant 4, and the entire set of equipment is sterilized by high-pressure steam at 135° C. (30 minutes) and then reused.

[0117] 6. Verify Data

[0118] (1) Accuracy test: In the simulated surgery, the average error between the implant expansion height and the display pin scale reading was 0.8 mm (standard deviation 0.2 mm).

[0119] (2) Operation efficiency: The single height adjustment time is shortened from 45 seconds for traditional equipment to 28 seconds (efficiency increased by 38%).

[0120] (3) Durability: After 200 cycles of testing, the thread clearance between the inner screw and the sleeve increased by ≤0.05mm, and the display pin offset was <0.5mm.

[0121] Embodiment 2

[0122] This embodiment is optimized based on embodiment 1, and the main improvements are as follows:

[0123] 1. Improved counter component

[0124] The width of the guide groove 211 is adjustable: by replacing different guide sleeves 201, the groove width can be adjusted within the range of 2-4 mm to adapt to different surgical scenarios (such as a narrower groove width is required under minimally invasive incisions).

[0125] Refinement of scale division value: The minimum division value can be set to 0.5mm (needs to be used with a magnifying glass scale mark), which is suitable for surgeries such as cervical spine that require higher precision.

[0126] 2. Improvements in implant components

[0127] Highly customizable: The maximum expansion height of the nickel-titanium alloy stent supports multiple specifications such as 40mm, 45mm, and 55mm, which can meet the needs of different thoracic and lumbar segments.

[0128] Adjustable expansion force: By changing the wall thickness of the stent (0.5-1.2mm), the expansion force can be adjusted within the range of 150-300N to match patients with osteoporosis or osteosclerosis.

[0129] 3. Technical Effect

[0130] Enhanced adaptability: Adjustable guide slots and customized implants cover more than 90% of intervertebral disc surgery types.

[0131] Improved precision: 0.5mm graduation value keeps the height error of cervical spine surgery within ±0.3mm.

[0132] In summary, the present application realizes the real-time and precise control of the implant expansion height through the integrated design of mechanical transmission and visual feedback. The present application further expands the clinical application range and adjustment accuracy of the device.

[0133] The present application as a whole has the core advantages of compact structure and intuitive operation, and can effectively solve the problems of operation-feedback separation and insufficient precision in traditional technologies.

[0134] Embodiment 3

[0135] This embodiment is optimized on the basis of the first and second embodiments, and the main improvements are as follows:

[0136] like Figure 4 , Figure 8 As shown, the screw adjustment block 204 is a columnar structure, and a mounting groove 214 is radially provided therein; the mounting groove is a circular groove.

[0137] A cylindrical threaded connection block 203 is fixed in the installation groove 214, and a semi-threaded hole 213 is provided on the cylindrical threaded connection block 203;

[0138] An external threaded sleeve 51 is provided at one end of the operating rod 1 close to the operating handle, and the external threaded sleeve 51 is engaged with the semi-threaded hole 213 of the threaded connection block 203;

[0139] The inner screw 207 is driven to rotate by rotating the operating handle, thereby driving the sliding sleeve 205 and the display pin 206 to move along the guide groove 211 .

[0140] Finally, in order to explain this application more clearly, the working principle of this application is described as follows:

[0141] This medical counter device is based on the synergistic mechanism of mechanical transmission and visual feedback, which converts the rotation of the operating rod into the linear expansion of the implant, and simultaneously realizes a highly real-time display through the scale indicator mechanism. Its core working principle is as follows:

[0142] 1. Rotational-linear motion conversion

[0143] Operation input: The doctor rotates the operating handle 1, driving the operating rod 1 and the external threaded sleeve 51 to rotate.

[0144] Torque transmission: The external threaded sleeve 51 engages with the semi-threaded hole 213 of the threaded connection block 203 to transmit the rotational torque to the internal screw 207 .

[0145] Screw drive: During the rotation process, the internal screw 207 converts the rotational motion into the linear movement of the sleeve 205 along the axial direction by cooperating with the thread of the sleeve 205 (pitch 2mm).

[0146] Mechanical transmission ratio: for each rotation (360°), the moving distance of the sleeve 205 = the thread pitch (2 mm), and the expansion height of the implant (4) = the moving distance of the sleeve (1:1 linear ratio).

[0147] 2. Highly real-time feedback mechanism

[0148] Display positioning: The axial movement of the sliding sleeve 205 drives the display pin 206 to slide along the guide groove 211 of the guide sleeve 201 .

[0149] Scale marking: A 0-50 mm scale (division value 1 mm) is provided next to the guide groove 211, and the fluorescent coating at the end of the display pin 206 points to the current height value.

[0150] Error control: The lateral limiting function of the guide groove 211 prevents the sliding sleeve 205 from circumferential deviation, ensuring that the display pin 206 is strictly aligned with the scale, and the reading error is ≤±1mm.

[0151] 3. Implant expansion control

[0152] Force transmission path: The rotation of the inner screw 207 is transmitted to the connecting head 32 of the implant 3 through the nut 202, pushing the retractable support of the implant 4 to unfold.

[0153] Bidirectional adjustment: positive rotation expands the implant 4, and the display pin 206 moves toward the 50mm scale direction. Reverse rotation contracts the implant 4, and the display pin 206 moves toward the 0mm scale direction.

[0154] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0155] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it; when the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A medical counter device, characterized in that: include: An operating rod (1), a counter (2), an implant (3) and an implant (4); The operating rod (1) has an operating handle at one end, and the other end passes through the counter (2) and extends into the interior of the driver (3); The counter (2) comprises a linkage mechanism and a scale indicating mechanism, wherein the linkage mechanism is driven by the rotation of the operating rod (1), and the scale indicating mechanism can move synchronously along the axial direction of the operating rod (1) to display the expansion height of the implant (4) in real time; The driver (3) is connected to one end of the counter (2), and a connector (32) is provided at the end of the driver (3) for detachably connecting with the implant (4); The expansion height of the implant (4) is adjusted by rotating the operating rod (1) in the forward or reverse direction.

2. The medical counter device according to claim 1, characterized in that: The linkage mechanism comprises an inner screw (207) and a guide sleeve (201); A screw adjusting block (204) is fixed to one end of the inner screw (207), and a nut (202) connected to the driver (3) is provided at the other end; An axial through hole is provided at the center of the inner screw (207), and the operating rod (1) passes through the through hole and is threadedly connected to the connecting head (32) of the driver (3); The guide sleeve (201) is sleeved on the outside of the inner screw (207), and a guide groove (211) is opened on its surface along the axial direction. A scale mark is arranged beside the guide groove (211).

3. The medical counter device according to claim 2, characterized in that: The scale indicating mechanism comprises a sliding sleeve (205) and a display pin (206); The sliding sleeve (205) is sleeved on the inner screw (207) and is threadedly connected to the inner screw (207); One end of the display pin (206) is fixed to the sliding sleeve (205), and the other end extends into the guide groove (211) of the guide sleeve (201), and can slide along the guide groove (211) and point to the scale mark.

4. The medical counter device according to claim 2, characterized in that: The screw rod adjustment block (204) is a columnar structure and is radially provided with a mounting groove (214); A threaded connection block (203) is fixed in the installation groove (214), and a semi-threaded hole (213) is provided on the threaded connection block (203); An external threaded sleeve (51) is provided at one end of the operating rod (1) close to the operating handle and can move forward and backward along the operating rod, and the external threaded sleeve (51) is engaged with a semi-threaded hole (213) of the threaded connection block (203); The inner screw (207) is driven to rotate by rotating the operating handle, thereby driving the sliding sleeve (205) and the display pin (206) to move along the guide groove (211).

5. The medical counter device according to claim 1, characterized in that: The operating rod (1) is detachably connected to the counter (2), and the operating handle is engaged with the threaded connection block (203) through the external threaded sleeve (51) to achieve torque transmission, so that the operating rod moves forward and backward to adjust the expansion height of the implant.

6. The medical counter device according to claim 3, characterized in that: The moving distance of the display pin (206) is linearly proportional to the expansion height of the implant (4), and is used to accurately feedback the expansion height; the implant (3) is provided with a gripping handle (31) for operating the implantation process of the implant (4); the implant (4) is a retractable structure, and its expansion height is displayed in real time through the scale mark of the counter (2), and the maximum expansion height is 10 mm.

7. The medical counter device according to claim 1, characterized in that: The display pin (206) of the scale indicating mechanism of the counter (2) moves axially, and its moving distance is proportional to the expansion height of the implant (4), so as to accurately display the expansion state of the implant (4).

8. The medical counter device according to claim 1, characterized in that: The implant (4) has an expanded state and a non-expanded state, and the expanded height is displayed by a scale indicating mechanism of the counter (2), which is used to adjust the expanded height of the implant (4) according to surgical requirements.

9. The medical counter device according to claim 1, characterized in that: The scale indicating mechanism of the counter (2) is provided with scale lines ranging from 0 to 10 mm; the expansion height adjustment range of the implant (4) is 0 to 10 mm, which matches the scale setting range of the scale indicating mechanism.

10. A method for using a medical counter device, characterized in that: Using the medical counter device according to any one of claims 1 to 9 comprises the following steps: Assemble the operating rod (1) and the counter (2) via a threaded connection block (203) and an external threaded sleeve (51); Locking the connector (32) of the driver (3) and the implant (4); Implanting the implant (4) into the intervertebral disc via the gripping handle (31) of the driver (3); Rotating the operating handle to drive the inner screw (207) to rotate, thereby adjusting the spreading height of the implant (4); The expansion height is monitored in real time by displaying the scale mark pointed by the pin (206).

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