Preoperative incision positioning device for minimally invasive spine surgery

Abstract

The application discloses a preoperative incision positioning device for spine minimally invasive surgery, which comprises a support, a transverse positioning assembly transversely and slidably connected to the support and a longitudinal positioning assembly longitudinally and slidably connected to the support, the transverse positioning assembly comprising a scribing plate, a connecting rod component and a screw rod, the scribing plate being arranged on the opposite side and being rotatably connected to the two ends of the connecting rod component, the connecting rod component being arranged in a rhombic shape, and the screw rod being arranged at the proximal end of the rhombic connecting rod in a bidirectional thread, the proximal end of the rhombic connecting rod being driven to move towards the center, and the distal end of the rhombic connecting rod being driven to move away from the center, the longitudinal positioning assembly being provided with disc bodies capable of being vacuum adsorbed at the two ends and being provided with a gear set at the middle for driving the support in the same direction. The scribing plate is transversely driven by the screw rod and the connecting rod component, the screw thread drive itself has a certain damping, the movement and fixation are facilitated, the screw thread drive is continuously driven, and thus the scribing plate is conveniently transversely finely adjusted and positioned.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, specifically relating to a preoperative incision positioning device for minimally invasive spinal surgery. Background Technology

[0002] Over the past few decades, minimally invasive spine surgery (MISS) has gained recognition for its advantages, including less soft tissue damage, less blood loss, lower infection rate at the surgical site, better cosmetic results, and earlier ambulation or return to work.

[0003] Currently, Chinese patent CN103830007B is a preoperative incision positioning device for minimally invasive spinal surgery. However, it still has the following shortcomings in the positioning process during minimally invasive spinal surgery:

[0004] 1. The aforementioned preoperative incision positioning device for minimally invasive spinal surgery allows for the use of a ruler to locate the pedicles and to directly mark incision lines on the ruler for vertebroplasty. However, during the lateral positioning and marking process, the device uses a toothed mechanism for positioning and fixation, but the teeth skip during lateral movement for calibration, making precise bidirectional calibration and positioning difficult.

[0005] 2. If the device is used during a double-segment spinal surgery, and the procedure is changed to operate on the other segment after the first segment is completed, the device needs to be repositioned, which is a rather cumbersome operation. Furthermore, it cannot be fixed to the patient's spine when the patient is in a lateral decubitus position. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a preoperative incision positioning device for minimally invasive spinal surgery. This device is equipped with a transverse positioning component and a longitudinal positioning component, enabling bidirectional positioning incisions on the spine. It also features a vacuum disc for adsorption and fixation to the patient's back, facilitating easy fixation during the lateral decubitus positioning process.

[0007] To achieve the technical effect of solving the above-mentioned technical problems, the present invention is implemented through the following technical solution:

[0008] A preoperative incision positioning device for minimally invasive spinal surgery includes a support. The support has a lateral positioning component that slides laterally and a longitudinal positioning component that slides longitudinally. The lateral positioning component includes a scribing plate, a connecting rod, and a screw. The scribing plate is located on opposite sides and rotatably connected to both ends of the connecting rod. The connecting rod is arranged in a rhomboid shape, and a double-threaded screw is provided at the proximal pivot of the rhomboid connecting rod. The screw drives the proximal end of the rhomboid connecting rod to move towards the center, while the distal pivot opens to both sides. The longitudinal positioning component has vacuum-adsorbable discs at both ends and a gear set in the middle for co-directional transmission of the support.

[0009] Furthermore, the marking plate is provided with several marking grooves, and a transparent plate is provided near the inner side of the plate, on which a pedicle contour diagram is also provided.

[0010] Furthermore, a slider is provided at the near end of the connecting rod component and is slidably connected to the inside of the bracket, and the screw is bidirectionally threaded to the slider.

[0011] Furthermore, the longitudinal positioning component is configured with two guide rods, and the gear set is located in the middle of the two guide rods. The gear set includes a rack fixed on the two guide rods, and a transmission rod with gears at both ends is provided between the two racks. A bevel gear is provided in the middle of the transmission rod for vertical transmission, and a knob is also provided at the shaft of the circumferentially rotating bevel gear.

[0012] Furthermore, the guide rod end is also provided with a vacuum-adsorbable disc body, and the disc body is provided with a vacuum disc handle that is threadedly connected to the guide rod, and the vacuum disc handle is rotatably connected to the disc body.

[0013] Furthermore, the bracket is provided with an arc groove and a scale rod at the central axis of its lower bottom surface.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention uses a screw and connecting rod assembly to perform stepless transmission to drive the marking plate laterally. The screw drive itself has a certain damping, which facilitates movement and fixing. The screw drive is continuous, which facilitates fine-tuning laterally to position the marking plate.

[0016] 2. This invention includes a longitudinal positioning sliding component. When multiple spinal incisions need to be located, the component is simply slid to the next spinal segment, and then the incision is located using different standard marking grooves corresponding to different spinal segment standards. This avoids the need for the marking plate to be laterally aligned again.

[0017] 3. The present invention has a vacuum adsorption disc at the end of each guide rod, thereby adsorbing the entire device onto the patient's back. Even if the patient is in a lateral decubitus position for minimally invasive spinal surgery, the device can be fixed to locate the incision. After fixation, the device can be finely adjusted longitudinally and laterally. Attached Figure Description

[0018] Figure 1 This is a 3D diagram of a preoperative incision positioning device for minimally invasive spinal surgery.

[0019] Figure 2 This is a 3D diagram of the longitudinal positioning component of a preoperative incision positioning device for minimally invasive spinal surgery.

[0020] Figure 3 This is a 3D diagram of the transverse positioning component of a preoperative incision positioning device for minimally invasive spinal surgery.

[0021] Figure 4 This is a 3D diagram of the support frame for the preoperative incision positioning device in minimally invasive spinal surgery.

[0022] Figure 5 This is a plan view of the support frame for the preoperative incision positioning device in minimally invasive spinal surgery.

[0023] The numbers in the diagram are as follows: 1-Bracket, 101-Scale rod, 1011-Scale, 102-Arc groove, 2-Transverse positioning component, 201-Scribble plate, 2011-Scribble groove, 2012-Transparent plate, 2013-Pedicle outline, 202-Connecting rod component, 203-Screw, 3-Longitudinal positioning component, 301-Guide rod, 302-Knob, 303-Transmission rod, 304-Vacuum disc handle, 305-Disc body, 306-Bevel gear, 607-Rack, 608-Gear. Detailed Implementation

[0024] Example 1

[0025] This embodiment is referred to Figures 1 to 5 A preoperative incision positioning device for minimally invasive spinal surgery includes a support 1. A transverse positioning component 2, slidably connected to the support 1, is used for fine-tuning and positioning the preoperative incision in the transverse direction. The transverse positioning component 2 includes a marking plate 201, a connecting component 202, and a screw 203. The marking plate 201 is positioned on opposite sides of the support 1 and can slide laterally relative to the support 1. The marking plate 201 has several marking grooves 2011. After positioning the marking plate 201, lines can be drawn corresponding to different vertebral segments in the marking grooves 2011. Those skilled in the art will understand that the corresponding marking grooves 2011 correspond to the standard vertebral segments. A transparent plate 2012 is provided near the inner side of the marking plate 201. During adjustment, as those skilled in the art know, the outer edge of the transparent plate 2012 is tangent to the translucent edge of the spine during calibration. The transparent plate 2012 also has a pedicle contour map 2013, which corresponds to the pedicle contour of the patient's spine during adjustment. The lower bottom surface of the support 1 also has an arc groove 102 and a scale rod 101 at its central axis. The scale rod has corresponding scales 1011 for use in aligning with or transilluminating bone locations on the patient's spine; the locations of these bones are well known to those skilled in the art. The marking plate 201 is rotatably connected to both ends of the connecting component 202. The connecting component 202 is configured as a rhomboid connecting rod, and a double-threaded screw 203 is provided at the proximal pivot of the rhomboid connecting rod. The screw 203 drives the proximal end of the rhomboid connecting rod to move towards the center, and the distal pivot to spread outwards, thereby pushing the marking plate 201 to slide outwards and fix it. A slider is provided at the proximal end of the connecting component 202 and is slidably connected to the inside of the support 1. The screw 203 is double-threaded and connected to the slider. During rotation of the screw 203, it can drive the two sliders to slide towards the center or outwards.

[0026] Example 2

[0027] See Figures 1 to 5 A preoperative incision positioning device for minimally invasive spinal surgery includes a support 1. A longitudinal positioning component 3 is slidably connected to the support 1. Both ends of the longitudinal positioning component 3 are equipped with vacuum-adhesive discs 305, which can be used to adhere and fix the device to the patient's back. A vacuum disc handle 304, threadedly connected to a guide rod 301, is provided on the disc 305. The vacuum disc handle 304 is rotatably connected to the disc 305, thereby adjusting the distance between the suction cup and the guide rod 301, and thus adjusting the relative position of the device.

[0028] The gear set located in the middle of the guide rod 301 can transmit power to the support 1 in the same direction, thereby allowing the device to move unilaterally. The marking plate 201 is then repositioned vertically according to the next vertebral bone to locate the new incision position. The longitudinal positioning assembly 3 consists of two guide rods 301, with the gear set located in the middle of the two guide rods 301. The gear set includes racks fixed to the two guide rods 301, and a transmission rod 303 with gears 608 at both ends is located between the two racks 607. A bevel gear in the middle of the transmission rod 303 provides vertical transmission. A knob 302 is also located at the shaft of the circumferentially rotating bevel gear 306. Rotating the knob 302 allows for sequential transmission between the gear components, controlling the movement of the entire device.

[0029] These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A preoperative incision positioning device for minimally invasive spinal surgery, characterized in that, The system includes a support frame, on which a lateral positioning component is slidably connected laterally and a longitudinal positioning component is slidably connected longitudinally. The lateral positioning component includes a scribing plate, a connecting rod component, and a screw. The scribing plate is positioned on opposite sides and rotatably connected to both ends of the connecting rod component. The connecting rod component is arranged in a diamond shape, and a double-threaded screw is provided at the proximal pivot of the diamond-shaped connecting rod. The screw drives the proximal end of the diamond-shaped connecting rod to move towards the center, while the distal pivot opens to both sides. The longitudinal positioning component has vacuum-adsorbable discs at both ends and a gear set in the middle for co-directional transmission of the support frame.

2. The preoperative incision positioning device for minimally invasive spinal surgery according to claim 1, characterized in that, The marking plate has several marking grooves, and a transparent plate is provided near the inner side of the plate, on which a pedicle contour diagram is also provided.

3. The preoperative incision positioning device for minimally invasive spinal surgery according to claim 1, characterized in that, The connecting rod component has a slider at its near end that is slidably connected to the inside of the bracket, and the screw is connected to the slider by a bidirectional thread.

4. The preoperative incision positioning device for minimally invasive spinal surgery according to claim 1, characterized in that, The longitudinal positioning component is configured with two guide rods, and the gear set is located in the middle of the two guide rods. The gear set includes a rack fixed on the two guide rods, and a transmission rod with gears at both ends is provided between the two racks. A bevel gear is provided in the middle of the transmission rod for vertical transmission, and a knob is also provided at the shaft of the circumferentially rotating bevel gear.

5. The preoperative incision positioning device for minimally invasive spinal surgery according to claim 4, characterized in that, The guide rod is also provided with a vacuum adsorption disk at its tail end. The disk is provided with a vacuum disk handle that is threadedly connected to the guide rod, and the vacuum disk handle is rotatably connected to the disk.

6. The preoperative incision positioning device for minimally invasive spinal surgery according to claim 1, characterized in that, The bracket also has an arc groove and a scale rod at the center of its bottom surface.

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