Visual nerve retractor under minimally invasive single-side dual-channel endoscope for spine

Abstract

The invention discloses a spine minimally invasive single-side double-channel endoscopic visual nerve drag hook, which adopts a double-channel drag hook design, can simultaneously drag a nerve root from two points, and effectively avoids the problem of stress concentration of the nerve root possibly caused by traditional single-point traction through the dispersed traction mode. Therefore, the risk of nerve injury is obviously reduced. Secondly, the two drag hooks of the device can be flexibly adjusted according to the depth of a target part, vertical movement and fixation of the drag hooks can be achieved by simply rotating bolts, the device can meet the requirements of different patients and operation scenes through the adjustability, and the universality and applicability of the device in clinical application are improved. Besides, in the using process, the hook portion can be unfolded outwards only by pressing the button, the hook portion can contract inwards automatically after the button is released, the operation process is greatly simplified through the design, and the inconvenience that a surgeon needs to hold the device for a long time is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a minimally invasive spinal unilateral dual-channel endoscopic visual nerve retractor. Background Art

[0002] In the current medical field, minimally invasive spinal unilateral dual-channel endoscopic surgery (UBE), as an emerging minimally invasive technique, has been widely used in the treatment of various spinal diseases such as lumbar disc herniation. However, during the actual operation of UBE surgery, when performing key steps such as spinal canal decompression or discectomy, there are still many challenges in the link of retracting the dura mater and nerve roots to expose the protruding intervertebral disc. The currently commonly used nerve retractors have obvious defects in design and function: Firstly, the existing devices are relatively thick and clumsy in structure, and in the limited surgical space, they will seriously block other surgical instruments entering and exiting, greatly affecting the smoothness and efficiency of the surgical operation. Secondly, during the operation, the nerve roots and dura mater in the retaining piece will bear a relatively high pulling force, and due to the existence of the expansion areas at both ends of the retaining piece, it is extremely easy to cause nerve damage, which not only increases the surgical risk but also may affect the postoperative rehabilitation effect of the patient. Thirdly, the front hooks of the existing nerve retractors are mostly designed to be fixed on the handle, and the length of the hook cannot be adjusted flexibly. There are significant differences in the depth of the spinal canal from the skin and the transverse diameter of the spinal canal among different patients, which makes it difficult for the surgeon to accurately adapt to the specific anatomical structure of each patient during the actual operation, bringing great inconvenience to the surgical operation.

[0003] In addition, even if some retractors attempt to design the hook part with adjustable length, such as the nerve root retractor disclosed in the patent with the application number 201921184582.8, by squeezing the gas in the bladder to push the valve block to move to change the length of the wrapper, this technology has obvious deficiencies. Since the bladder is easy to deform and the gas is easily compressed and contracted, it is difficult to lock the position of the valve block, resulting in the length of the wrapper changing randomly during use and unable to provide stable and reliable operation support for the surgeon.

[0004] In summary, the application effect of the existing nerve root retractors in minimally invasive spinal unilateral dual-channel endoscopic surgery is not satisfactory. There is an urgent need for a newly designed nerve root retractor to solve the many problems existing in the prior art and meet the actual needs of clinical surgery. Summary of the Invention

[0005] To solve the above technical problems, the present invention designs a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine. The device adopts a dual-channel retractor design, which can simultaneously pull the nerve root from two points, thereby dispersing the concentrated pulling force received by the nerve root and reducing the possibility of nerve injury. In addition, the two retractors of the device can be adjusted respectively according to the depth of the target site. During use, the position of the retractor can be easily moved up and down and fixed by rotating the bolt. In addition, when using this device, just press the button to make the hook part expand outward, and when the button is released, the hook part will automatically contract inward, and there is no need to hold the device for a long time during the pulling operation.

[0006] To achieve the above technical effects, the present invention discloses a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine, comprising: a mounting base, a first retractor assembly, a second retractor assembly, a first bolt, and a second bolt; the first retractor assembly is slidably sleeved inside the mounting base; the first bolt is threadedly connected to the first retractor assembly; the first bolt is magnetically connected to the mounting base; the second retractor assembly is slidably sleeved inside the mounting base; the second bolt is threadedly connected to the second retractor assembly; the second bolt is magnetically connected to the mounting base;

[0007] Further, the first retractor assembly includes: a first guide tube, a first hook part, a first connecting shaft, a first spring, a first push rod, and a first button; the first push rod is slidably sleeved inside the first guide tube; the top of the first push rod is spherically jointed to the first connecting shaft, and the other end of the first connecting shaft is spherically jointed to the first hook part; the first hook part is rotatably connected to the end of the first guide tube; one end of the first spring is fixedly connected to the first guide tube, and the other end of the first spring is fixedly connected to the first button; the first button is fixedly connected to the first push rod;

[0008] Further, a first threaded section is fixedly provided on the outside of the first guide tube, and the first bolt is threadedly connected to the first threaded section;

[0009] Further, a first support plate is fixedly provided at the top of the first guide tube;

[0010] Further, the second retractor assembly includes: a second guide tube, a second hook part, a second connecting shaft, a second spring, a second push rod, and a second button; the second push rod is slidably sleeved inside the second guide tube; the top of the second push rod is spherically jointed to the second connecting shaft, and the other end of the second connecting shaft is spherically jointed to the second hook part; the second hook part is rotatably connected to the end of the second guide tube; one end of the second spring is fixedly connected to the second guide tube, and the other end of the second spring is fixedly connected to the second button; the second button is fixedly connected to the second push rod;

[0011] Furthermore, a second threaded section is fixedly arranged outside the second guiding tube, and the second bolt is threadedly connected to the second threaded section;

[0012] Furthermore, a second support plate is fixedly arranged at the top of the second guiding tube.

[0013] The beneficial effects of the present invention are as follows:

[0014] The present invention discloses a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine. First, the device adopts a dual-channel retractor design, which can simultaneously pull the nerve root from two points. This dispersed pulling method effectively avoids the problem of concentrated force on the nerve root caused by traditional single-point pulling, thus significantly reducing the risk of nerve injury and providing an important guarantee for the safety of the operation. Second, the two retractors of the device can be flexibly adjusted according to the depth of the target site. By simply turning the bolt, the up and down movement and fixation of the retractor can be achieved. This adjustability enables the device to meet the needs of different patients and surgical scenarios, improving its versatility and applicability in clinical applications. In addition, during use, simply pressing the button can make the hook part expand outwards, and the hook part can automatically contract inwards after releasing the button. This design greatly simplifies the operation process, avoids the inconvenience of the surgeon having to hold the device for a long time, thus significantly reducing the surgical burden on the doctor and improving the convenience and efficiency of the surgical operation. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below.

[0016] Figure 1 is an overall structural schematic diagram of a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine;

[0017] Figure 2 is a partial structural schematic diagram of a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine;

[0018] Figure 3 is another partial structural schematic diagram of a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine;

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1 - Mounting base, 2 - First hook assembly, 3 - Second hook assembly, 4 - First bolt, 5 - Second bolt, 201 - First guiding tube, 202 - First hook portion, 203 - First connecting shaft, 204 - First spring, 205 - First push rod, 206 - First button, 207 - First threaded section, 208 - First support plate, 301 - Second guiding tube, 302 - Second hook portion, 303 - Second connecting shaft, 304 - Second spring, 305 - Second push rod, 306 - Second button, 307 - Second threaded section, 308 - Second support plate. Detailed implementation mode

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Embodiment 1

[0023] The present invention discloses a minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine. Refer to Figures 1 to 3 , in order to achieve the above technical effects, the present invention discloses a unilateral dual-channel endoscopic visual nerve retractor for minimally invasive spine surgery. The device mainly consists of a mounting base 1, a first hook assembly 2, a second hook assembly 3, a first bolt 4 and a second bolt 5. Among them, both the first hook assembly 2 and the second hook assembly 3 are designed to be slidably sleeved inside the mounting base 1 so as to be able to flexibly adjust the position. The first bolt 4 is threadedly connected to the first hook assembly 2 and fixed to the mounting base 1 by magnetic connection, thereby realizing the stable support and position adjustment of the first hook assembly 2. Similarly, the second bolt 5 is also connected to the second hook assembly 3 by threaded connection and combined with the mounting base 1 by magnetic connection to ensure the stability and adjustability of the second hook assembly 3.

[0024] The first retractor assembly 2 includes a first guide tube 201, a first hook portion 202, a first connecting shaft 203, a first spring 204, a first push rod 205 and a first button 206. The first push rod 205 is designed to be slidably sleeved inside the first guide tube 201. This structure allows the push rod to move freely within the guide tube, thus realizing the expansion and contraction actions of the hook portion. The top of the first push rod 205 is connected to the first connecting shaft 203 through a spherical joint, and the other end of the first connecting shaft 203 is connected to the first hook portion 202 through a spherical joint, enabling it to adjust the angle according to the surgical needs. The first hook portion 202 is fixed to the end of the first guide tube 201 by means of a rotational connection to ensure its stability during use. In addition, one end of the first spring 204 is fixedly connected to the first guide tube 201, and the other end is fixedly connected to the first button 206. The first button 206 is also fixedly connected to the first push rod 205. This structural design enables the hook portion to be pushed to expand when the button is pressed, and when the button is released, the elastic restoring force of the spring will cause the hook portion to automatically contract, thus realizing the automatic expansion and contraction function of the hook portion, greatly simplifying the surgical operation process.

[0025] A first threaded section 207 is fixedly arranged on the outside of the first guide tube 201. The first bolt 4 precisely adjusts and fixes the position of the first retractor assembly 2 through threaded connection with this threaded section. This threaded connection method is not only easy to operate but also can provide a stable fixing effect, ensuring the position accuracy and stability of the retractor during the surgical process. In addition, a first support plate 208 is fixedly arranged on the top of the first guide tube 201. The design of this support plate can provide a supporting force for the first spring 204 and enhance its stability.

[0026] Similarly, the structural design of the second retractor assembly 3 is similar to that of the first retractor assembly 2, and also includes a second guide tube 301, a second hook portion 302, a second connecting shaft 303, a second spring 304, a second push rod 305 and a second button 306. The second push rod 305 is slidably sleeved inside the second guide tube 301. The top of the second push rod 305 is connected to the second connecting shaft 303 through a spherical joint, and the other end of the second connecting shaft 303 is connected to the second hook portion 302 through a spherical joint. The second hook portion 302 is fixed to the end of the second guide tube 301 by means of a rotational connection to ensure its stability during the surgical process. One end of the second spring 304 is fixedly connected to the second guide tube 301, and the other end is fixedly connected to the second button 306. The second button 306 is fixedly connected to the second push rod 305. This design enables the second retractor assembly 3 to also have the function of automatic expansion and contraction, working in cooperation with the first retractor assembly 2 to achieve double-point dispersion traction of the nerve root.

[0027] The outer part of the second guiding tube 301 is fixedly provided with a second threaded section 307. Through the threaded connection with this threaded section, the second bolt 5 realizes the precise adjustment and fixation of the position of the second hook assembly 3. This threaded connection method is also easy to operate and has a stable fixation effect, ensuring the position accuracy and stability of the second hook assembly 3 during the operation. In addition, a second support plate 308 is also fixedly provided at the top of the second guiding tube 301, and its function is similar to that of the first support plate 208. It may be to provide a supporting force for the second spring 304 during the operation and enhance the stability during traction.

[0028] The working principle and usage process of this device are as follows:

[0029] Before the operation starts, the doctor first installs the device on the operation platform of the surgical instrument to ensure its coordinated cooperation with the endoscope system and other surgical tools. The core components of the device include the mounting base 1, the first hook assembly 2, and the second hook assembly 3. These two hook assemblies are installed inside the mounting base 1 in a sliding sleeve manner and can be flexibly adjusted according to the surgical needs. Both the first hook assembly 2 and the second hook assembly 3 are equipped with independent bolts. The bolts are fixed to the hook assemblies and the mounting base 1 through threaded connection and magnetic connection. This design not only ensures the stability of the hook assemblies but also facilitates the doctor to quickly adjust the height and angle of the hooks during the operation to adapt to the anatomical structure differences of the spinal columns of different patients.

[0030] When it is necessary to perform traction on the nerve root, the doctor observes the surgical area through the endoscope system and manually rotates the first bolt 4 or the second bolt 5 according to the position of the target nerve root. The rotation of the bolt drives the corresponding hook assembly to move up and down inside the mounting base 1, thereby adjusting the height of the hook so that it can accurately contact the target nerve root. This dual-channel design allows the two hooks to work simultaneously, applying dispersed pulling forces to the nerve root from different directions, effectively avoiding the risk of nerve injury caused by traditional single-point traction.

[0031] After adjusting the position of the hook, the doctor presses the first button 206 or the second button 306. The button pushes the corresponding hook part to expand outward through the fixedly connected push rod. The hook part is connected to the connecting shaft through a spherical joint, and the other end of the connecting shaft is connected to the rotational connection structure at the end of the guiding tube, ensuring that it can firmly grasp the nerve root. When it is necessary to pull the nerve root, the doctor only needs to release the button, and the spring inside the hook assembly will automatically pull the hook part back under the action of the elastic restoring force, causing it to contract inward and pull the nerve root. This automatic expansion and contraction mechanism greatly simplifies the surgical operation process. The doctor does not need to hold the device for a long time, reducing the surgical fatigue and improving the surgical efficiency.

[0032] During the entire surgical procedure, the doctor can clearly observe the interaction between the retractor and the nerve root through the endoscopic system, ensuring the accuracy and safety of the retraction operation. The visibility design of the device enables the doctor to monitor the status of the nerve root in real time, adjust the retraction force and direction in a timely manner, and avoid excessive retraction or accidental injury to surrounding tissues. In addition, the support plates provided at the tops of the first guiding tube 201 and the second guiding tube 301 provide additional stability support for the retractor assembly, ensuring that the retractor assembly does not move or shake accidentally during the retraction process, further guaranteeing the safety and reliability of the surgery.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described.

Claims

1. A minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine, characterized in that, Comprising: A mounting base, a first hook assembly, a second hook assembly, a first bolt, and a second bolt; the first hook assembly is slidably sleeved inside the mounting base; the first bolt is threadedly connected to the first hook assembly; the first bolt is magnetically connected to the mounting base; the second hook assembly is slidably sleeved inside the mounting base; the second bolt is threadedly connected to the second hook assembly; the second bolt is magnetically connected to the mounting base.

2. The minimally invasive unilateral dual-channel endoscopic visual nerve retractor according to claim 1, wherein The first hook assembly includes: a first guiding tube, a first hook portion, a first connecting shaft, a first spring, a first push rod, and a first button; the first push rod is slidably sleeved inside the first guiding tube; the top of the first push rod is spherically jointed to the first connecting shaft, and the other end of the first connecting shaft is spherically jointed to the first hook portion; the first hook portion is rotatably connected to the end of the first guiding tube; one end of the first spring is fixedly connected to the first guiding tube, and the other end of the first spring is fixedly connected to the first button; the first button is fixedly connected to the first push rod.

3. A minimally invasive unilateral two-channel endoscopic visual nerve retractor for the spine according to claim 2, characterized in that, A first threaded section is fixedly provided on the outside of the first guiding tube, and the first bolt is threadedly connected to the first threaded section.

4. A minimally invasive unilateral two-channel endoscopic visual nerve retractor for the spine according to claim 2, characterized in that, A first support plate is fixedly provided at the top of the first guiding tube.

5. A minimally invasive unilateral two-channel endoscopic visual nerve retractor for the spine according to claim 1, characterized in that, The second hook assembly includes: a second guiding tube, a second hook portion, a second connecting shaft, a second spring, a second push rod, and a second button; the second push rod is slidably sleeved inside the second guiding tube; the top of the second push rod is spherically jointed to the second connecting shaft, and the other end of the second connecting shaft is spherically jointed to the second hook portion; the second hook portion is rotatably connected to the end of the second guiding tube; one end of the second spring is fixedly connected to the second guiding tube, and the other end of the second spring is fixedly connected to the second button; the second button is fixedly connected to the second push rod.

6. A minimally invasive unilateral dual-channel endoscopic visual nerve retractor for the spine according to claim 5, characterized in that, A second threaded section is fixedly provided on the outside of the second guiding tube, and the second bolt is threadedly connected to the second threaded section.

7. A minimally invasive unilateral two-channel endoscopic visual nerve retractor for the spine according to claim 5, characterized in that, A second support plate is fixedly provided at the top of the second guiding tube.

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