Intracranial electrode implantation length measuring scale and measuring method

Abstract

The invention discloses an intracranial electrode implantation length measuring scale, and belongs to the technical field of measuring tools. The intracranial electrode implantation length measuring scale comprises a fixed scale, a vernier scale and two positioning sliding plates, a fixing groove is formed in the fixed ruler in the left-right direction, and electrode fixing devices are arranged at the positions, located at the two ends of the fixing groove, of the fixed ruler respectively; the positioning sliding plate is slidably arranged on the fixed ruler in the left-right direction, the left side edge of the positioning sliding plate is perpendicular to the fixed groove, and a first locking mechanism is arranged on the positioning sliding plate. The vernier is connected with the positioning sliding plate close to the left end of the fixed ruler, the vernier is parallel to the fixed ruler, the left end of the vernier is flush with the left side edge of the positioning sliding plate, a measuring groove is formed in the vernier in the left-right direction, and the left end of the measuring groove penetrates through the vernier. According to the invention, the implantation length of the intracranial electrode can be quickly measured, measurement errors and calculation errors caused by measurement by using a steel ruler are avoided, and meanwhile, the infection risk caused by back-and-forth switching of the steel ruler between a puncture needle and the to-be-measured electrode is also avoided.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, and in particular to an intracranial electrode implantation length measuring ruler and a measuring method. Background Art

[0002] There are two types of surgeries involved in intracranial electrode placement, namely deep brain stimulation (DBS) and stereoelectroencephalography (SEEG). Both types of surgeries use stereotactic methods or neurosurgical robot-assisted methods to place electrodes deep into the brain. Before both types of surgeries, medical staff will use a surgical planning system to determine the scalp entry point, surgical target, and surgical path. During the operation, a head frame or neurosurgical robot is used to assist in positioning according to the plan, and the electrodes are placed in the predetermined target.

[0003] Taking the neurosurgery robot-assisted SEEG electrode implantation surgery as an example, the surgical process is roughly as follows:

[0004] With the assistance of the surgical robot, the scalp entry point was determined, and then a self-stop hand drill was used to drill a hole of about 2 mm in the scalp and skull. After stopping the bleeding, the guide screw was fixed to the skull (the length of the guide screw screwed into the skull was uncertain, resulting in the length of the implanted electrode that could not be determined in the planning system);

[0005] Next, adjust the robot sleeve assembly to a fixed distance of one puncture needle from the target point, and then use the puncture needle for pre-puncture under the robot-assisted guidance to form a sinus tract in the brain. Pull out the puncture needle to the outer edge of the guide screw, clamp the mosquito hemostatic forceps on the upper edge of the robot sleeve assembly and completely pull out the puncture needle. Use a steel ruler to measure the length L2 from the surgical forceps to the tip of the puncture needle, and then use the length L1 of the puncture needle minus the measured length L2 to obtain the length L3 of the electrode to be placed in the skull.

[0006] Finally, use a steel ruler to measure the length L3 of the electrode to be tested that should be inserted into the skull, and adjust the limit sleeve of the electrode to be tested accordingly. Then, insert and fix the electrode under the guidance of the robot to complete the operation.

[0007] During the above-mentioned operation, the advantage of the method for measuring the length of the intracranial electrode is that the steel ruler is easy to obtain and can be sterilized and used repeatedly. However, the following problems exist when using this method:

[0008] The human brain has a complex structure and important functions, so the surgery of implanting electrodes in the skull requires extremely high accuracy and safety. However, due to the low accuracy of the steel ruler itself, the error will gradually increase during multiple measurements, and there is a possibility of calculation errors, which increases the risk of surgery. The steel ruler needs to be switched back and forth between the puncture needle and the electrode, which also increases the risk of infection during the operation. Summary of the Invention

[0009] The object of the present invention is to provide an intracranial electrode insertion length measuring ruler and a measuring method in view of the existing technical status, which can quickly measure the intracranial electrode insertion length, eliminate the measurement error and calculation error introduced by using a steel ruler, and at the same time, avoid the infection risk brought by the back-and-forth switching between the puncture needle and the electrode to be measured, greatly improving the accuracy and safety of the operation.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] An intracranial electrode insertion length measuring ruler includes a fixed ruler, a movable ruler and two positioning slides;

[0012] A fixed groove is provided on the fixed ruler along the left-right direction, and an electrode fixing device is provided at each end of the fixed ruler located in the fixed groove. An electrode fixing mechanism is provided on the electrode fixing device, and the electrode fixing mechanism is used to fix the electrode to be measured placed in the fixed groove;

[0013] The positioning slide is slidably arranged on the fixed ruler along the left-right direction, and its left side is perpendicular to the fixed groove. A first locking mechanism is provided on the positioning slide, and the first locking mechanism is used to lock the position of the positioning slide on the fixed ruler;

[0014] The movable ruler is connected to the positioning slide close to the left end of the fixed ruler. The movable ruler is parallel to the fixed ruler, and the left end of the movable ruler is flush with the left side of the positioning slide. A measuring groove is provided on the movable ruler along the left-right direction, and the left end of the measuring groove penetrates through the movable ruler.

[0015] Further, the positioning slide straddles the fixed groove, and a raised portion is provided at the corresponding position of the positioning slide and the fixed groove.

[0016] A first chute is provided on the fixed ruler, and a first slide rail is provided on the positioning slide. The positioning slide is slidably arranged on the fixed ruler through the cooperation of the first slide rail and the first chute.

[0017] Further, the electrode fixing device includes a fixed slide, and a second slide rail is provided on the fixed slide. The fixed slide is slidably arranged on the fixed ruler through the cooperation of the second slide rail and the first chute, and a raised portion is provided at the corresponding position of the fixed slide and the fixed groove. A second locking mechanism is provided on the fixed slide, and the second locking mechanism is used to lock the position of the fixed slide on the fixed ruler. The electrode fixing mechanism is arranged on the fixed slide.

[0018] Further, the electrode fixing mechanism includes a bracket, a connecting rod, a release cap, a limiting plate, an electrode pressing plate and a spring;

[0019] The bracket is of an inverted U-shaped structure and is fixed on the fixed slide;

[0020] The connecting rod penetrates through the top plate of the bracket and the raised portion of the fixed slide plate;

[0021] The release cap is connected to the upper end of the connecting rod and is located above the top plate of the bracket;

[0022] The limit plate is connected to the middle of the connecting rod and is located between the top plate of the bracket and the fixed slide plate;

[0023] The electrode pressing plate is connected to the lower end of the connecting rod and is located below the raised portion of the fixed slide plate;

[0024] The spring is sleeved on the connecting rod, is located between the top plate of the bracket and the limit plate, and is in a compressed state.

[0025] Furthermore, the electrode pressing plate is of an arc-shaped structure.

[0026] Furthermore, the electrode pressing plate is a rubber part.

[0027] Furthermore, both the first locking mechanism and the second locking mechanism include positioning screws. The positioning screw of the first locking mechanism penetrates through and is threadedly connected to the positioning slide plate, and the positioning screw of the second locking mechanism penetrates through and is threadedly connected to the fixed slide plate.

[0028] Furthermore, an electrode fixing mechanism is provided on the positioning slide plate far from the left end of the fixed scale. The electrode fixing mechanism is used to assist in fixing the electrode to be measured placed in the fixed groove.

[0029] An intracranial electrode insertion length measurement method, using the above-mentioned intracranial electrode insertion length measuring scale, includes the following steps:

[0030] S1. Place the unused puncture needle in the fixed groove provided on the fixed scale, and make the tip of the needle abut against the right end of the fixed groove;

[0031] S2. Slide the positioning slide plate close to the left end of the fixed scale so that its left side is flush with the needle tip of the puncture needle, and then lock it on the fixed scale through the first locking mechanism provided thereon;

[0032] S3. Take out the unused puncture needle, place the electrode to be measured in the fixed groove, and make its front end abut against the right end of the fixed groove, and then fix it in the fixed groove through the electrode fixing mechanism;

[0033] S4. Place the used puncture needle in the measurement groove, and make the surgical forceps closely adhere to the left end of the movable scale;

[0034] S5. Slide the positioning slide plate far from the left end of the fixed scale so that its left side is flush with the tip of the puncture needle, and then lock it on the fixed scale through the first locking mechanism provided thereon;

[0035] S6. Adjust the limiting sleeve of the electrode to be measured so that its right end is flush with the left side of the positioning slide plate far from the left end of the fixed ruler.

[0036] S7. Complete the measurement and take out the electrode to be measured.

[0037] The beneficial effects of the present invention are as follows:

[0038] The present invention provides a measuring ruler for the insertion length of an intracranial electrode. First, based on the unused puncture needle and the fixed groove, use a positioning slide plate to mark the position where the full length of the puncture needle is located on the fixed ruler. Then, based on the used puncture needle and the measurement groove, use another positioning slide plate to mark the position of the tip of the puncture needle on the fixed ruler. Finally, based on the electrode to be measured and the fixed groove, adjust the limiting sleeve of the electrode to be measured to complete the measurement.

[0039] According to the above design, the measuring ruler for the insertion length of an intracranial electrode can quickly measure the insertion length of the intracranial electrode without reading and calculation, eliminating the measurement error and calculation error introduced by using a steel ruler. At the same time, it also avoids the infection risk brought by switching back and forth between the puncture needle and the electrode to be measured, greatly improving the accuracy and safety of the operation. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of a measuring ruler for the insertion length of an intracranial electrode according to the present invention;

[0041] Figure 2 It is a schematic structural diagram of the connection between the movable ruler and the positioning slide plate near the left end of the fixed ruler in the measuring ruler for the insertion length of an intracranial electrode according to the present invention;

[0042] Figure 3 It is a schematic structural diagram of the positioning slide plate far from the left end of the fixed ruler in the measuring ruler for the insertion length of an intracranial electrode according to the present invention;

[0043] Figure 4 It is a schematic structural diagram of the fixed slide plate in the measuring ruler for the insertion length of an intracranial electrode according to the present invention;

[0044] Figure 5 It is a schematic structural diagram of the electrode fixing mechanism in the measuring ruler for the insertion length of an intracranial electrode according to the present invention.

[0045] Annotation description: 1. Fixed ruler, 101. Fixed groove, 102. First chute, 2. Fixed slide plate, 201. Second slide rail, 3. Positioning slide plate, 301. First slide rail, 4. Movable ruler, 401. Measurement groove, 5. First locking mechanism, 6. Second locking mechanism, 7. Bracket, 8. Release cap, 9. Spring, 10. Connecting rod, 11. Limiting plate, 12. Electrode pressing plate. Detailed Embodiments

[0046] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] Embodiment 1:

[0048] Please refer to Figures 1 to 3 As shown, an intracranial electrode insertion length measuring ruler includes a fixed ruler 1, a movable ruler 4 and two positioning slides 3.

[0049] A fixed groove 101 is provided on the fixed ruler 1 along the left-right direction (the size of which is slightly larger than the size of the electrode to be measured), and an electrode fixing device is provided at each end of the fixed groove 101 on the fixed ruler 1. An electrode fixing mechanism is provided on the electrode fixing device, and the electrode fixing mechanism is used to fix the electrode to be measured placed in the fixed groove 101.

[0050] For the fixed groove 101, preferably, the left end of the fixed groove 101 penetrates through the fixed ruler 1, which is conducive to placing the electrode to be measured in the fixed groove 101 or taking it out of the fixed groove 101 along the fixed groove 101.

[0051] The positioning slide 3 is slidably arranged on the fixed ruler 1 along the left-right direction, and its left side is perpendicular to the fixed groove 101. A first locking mechanism 5 is provided on the positioning slide 3, and the first locking mechanism 5 is used to lock the position of the positioning slide 3 on the fixed ruler 1. Among them, a first chute 102 is provided on the fixed ruler 1, and a first slide rail 301 is provided on the positioning slide 3. The positioning slide 3 is slidably arranged on the fixed ruler 1 through the cooperation of the first slide rail 301 and the first chute 102 to realize that the positioning slide 3 is slidably arranged on the fixed ruler 1 along the left-right direction; the first locking mechanism 5 includes a positioning screw, and the positioning screw of the first locking mechanism 5 penetrates through the positioning slide 3 and is threadedly connected thereto. Tightening the positioning screw can lock the position of the positioning slide 3 on the fixed ruler 1.

[0052] For the positioning slide 3, preferably, the positioning slide 3 straddles the fixed groove 101, and a raised portion is provided at the corresponding position thereof with the fixed groove 101 (to avoid the electrode to be measured placed in the fixed groove 101); at least one end of the first chute 102 penetrates through the fixed ruler 1, so that the positioning slide 3 can be disassembled along the first chute 102.

[0053] Exemplarily, in this embodiment, the number of the first chute 102 and the first slide rail 302 is both 2, and both ends of the first chute 102 penetrate through the fixed ruler 1.

[0054] The movable ruler 4 is connected to the positioning slide plate 3 near the left end of the fixed ruler 1. The movable ruler 4 is parallel to the fixed ruler 1, and the left end of the movable ruler 3 is flush with the left side of the positioning slide plate 3. A measuring groove 401 (with a size slightly larger than the puncture needle) is provided on the movable ruler 4 in the left-right direction, and the left end of the measuring groove 401 penetrates through the movable ruler 4.

[0055] Embodiment 2:

[0056] Please refer to Figure 1 、 4 As shown in FIGS. ~5, as another implementation manner, the electrode fixing device includes a fixed slide plate 2, and a second slide rail 201 is provided on the fixed slide plate 2. The fixed slide plate 2 is slidably arranged on the fixed ruler 1 through the cooperation of the second slide rail 201 and the first chute 102, and a raised portion (for avoiding the test electrode placed in the fixed groove 101) is provided at the corresponding position of the fixed slide plate 2 and the fixed groove 101. A second locking mechanism 6 is provided on the fixed slide plate 2. The second locking mechanism 6 is used to lock the position of the fixed slide plate 2 on the fixed ruler 1. The electrode fixing mechanism is arranged on the fixed slide plate 2. Among them, the second locking mechanism 6 includes a positioning screw, and the positioning screw of the second locking mechanism 6 penetrates through the fixed slide plate 2 and is threadedly connected thereto.

[0057] For the electrode fixing mechanism, specifically, the electrode fixing mechanism includes a bracket 7, a connecting rod 10, a release cap 8, a limiting plate 11, an electrode pressing plate 12 and a spring 9, where:

[0058] The bracket 7 is an inverted U-shaped structure and is fixed on the fixed slide plate 2;

[0059] The connecting rod 10 penetrates through the top plate of the bracket 7 and the raised portion of the fixed slide plate 2;

[0060] The release cap 8 is connected to the upper end of the connecting rod 10 and is located above the top plate of the bracket 7;

[0061] The limiting plate 11 is connected to the middle of the connecting rod 10 and is located between the top plate of the bracket 7 and the fixed slide plate 2;

[0062] The electrode pressing plate 12 is connected to the lower end of the connecting rod 10 and is located below the raised portion of the fixed slide plate 2;

[0063] The spring 9 is sleeved on the connecting rod 10 and is located between the top plate of the bracket 7 and the limiting plate 11 and is in a compressed state. In other words, one end of the spring 9 abuts against the top plate of the bracket 7, and the other end abuts against the limiting plate 11.

[0064] According to the above design, lifting the release cap 8 can release the test electrode, and lowering the release cap 8 can fix the test electrode. The purpose of fixing the test electrode is to prevent the test electrode from sliding or wrinkling during the measurement process.

[0065] For the electrode pressing plate 12, preferably, the electrode pressing plate 12 has an arc-shaped structure and is made of rubber to better fit and fix the electrode to be measured.

[0066] Exemplarily, in this embodiment, both the release cap 8 and the limit plate 11 have a disc-shaped structure, and the electrode pressing plate 12 has a semi-circular arc-shaped structure.

[0067] Embodiment 3:

[0068] Please refer to Figure 3 、 5 As shown, as another implementation manner, an electrode fixing mechanism is provided on the positioning slide plate 3 far from the left end of the fixed ruler 1, and the electrode fixing mechanism is used to assist in fixing the electrode to be measured placed in the fixed groove 101.

[0069] In addition, the fixed ruler 1, the movable ruler 4, the positioning slide plate 3, and the fixed slide plate 2 are all made of stainless steel to meet the requirements of repeated disinfection and use.

[0070] More specifically, as a usage method, an intracranial electrode insertion length measurement method using the above-mentioned intracranial electrode insertion length measuring ruler includes the following steps:

[0071] S1. Place the unused puncture needle in the fixed groove 101 provided on the fixed ruler 1 and make its needle tip abut against the right end of the fixed groove 101.

[0072] S2. Slide the positioning slide plate 3 close to the left end of the fixed ruler 1 so that its left side is flush with the needle tip of the puncture needle, and then lock it on the fixed ruler 1 through the first locking mechanism 5 provided thereon.

[0073] S3. Take out the unused puncture needle, place the electrode to be measured in the fixed groove 101 and make its front end abut against the right end of the fixed groove 101, and then fix it in the fixed groove 101 through the electrode fixing mechanism.

[0074] S4. Place the used puncture needle in the measurement groove 401 and make the surgical forceps closely adhere to the left end of the movable ruler 4. Taking the neurosurgical robot-assisted SEEG electrode insertion surgery as an example, the used puncture needle refers to:

[0075] Adjust the robot sleeve assembly to a fixed distance of one puncture needle from the target point, then pre-puncture with the puncture needle under the robot-assisted guidance to form a sinus in the brain, pull out the puncture needle to the outer edge of the guide screw, and clamp and completely extract the puncture needle with a mosquito forceps (a type of surgical forceps) at the upper edge of the robot sleeve assembly to obtain the used puncture needle. At this time, the mosquito forceps clamps the puncture needle.

[0076] S5, slide the positioning slide plate 3 away from the left end of the fixed ruler 1 so that its left side is flush with the needle tip of the puncture needle, and then lock it on the fixed ruler through the first locking mechanism 5 provided thereon;

[0077] S6. Adjust the limit sleeve of the electrode to be measured so that its right end is flush with the left side of the positioning slide plate 3 away from the left end of the fixed ruler (the ultimate purpose of measuring the length of the intracranial electrode is to adjust the position of the limit sleeve of the electrode);

[0078] S7. After the measurement is completed, take out the electrode to be tested.

[0079] After use, the entire measuring ruler is rinsed with clean water and disinfected for subsequent use.

[0080] According to the above measurement method, the intracranial electrode insertion length measuring ruler can be used to quickly measure the intracranial electrode insertion length without reading and calculation, thereby eliminating the measurement error and calculation error introduced by using a steel ruler for measurement. At the same time, it also avoids the infection risk caused by the steel ruler switching back and forth between the puncture needle and the electrode to be measured, greatly improving the accuracy and safety of the operation.

[0081] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art can implement the present invention in various other specific implementation modes based on the contents disclosed in the present invention. Therefore, any design that adopts the design structure and concept of the present invention and makes some simple changes or modifications shall fall within the scope of protection of the present invention.

Claims

1. A ruler for measuring the length of intracranial electrode placement, characterized in that: It includes a fixed ruler, a movable ruler and two positioning slide plates; The fixed ruler is provided with a fixing groove along the left-right direction, and an electrode fixing device is provided at each end of the fixing groove on the fixed ruler, and an electrode fixing mechanism is provided on the electrode fixing device, and the electrode fixing mechanism is used to fix the electrode to be tested placed in the fixing groove; The positioning slide is slidably arranged on the fixed ruler along the left-right direction, and its left side is perpendicular to the fixed groove. The positioning slide is provided with a first locking mechanism, and the first locking mechanism is used to lock the position of the positioning slide on the fixed ruler; The movable ruler is connected to the positioning slide plate near the left end of the fixed ruler. The movable ruler is parallel to the fixed ruler, and the left end of the movable ruler is flush with the left side of the positioning slide plate. A measuring groove is provided on the movable ruler in the left and right directions, and the left end of the measuring groove passes through the movable ruler.

2. The intracranial electrode implantation length measuring ruler according to claim 1, characterized in that: The positioning slide plate spans the fixing groove, and a bulge is provided at a position corresponding to the fixing groove.

3. The intracranial electrode implantation length measuring ruler according to claim 2, characterized in that: The fixed ruler is provided with a first slide groove, the positioning slide plate is provided with a first slide rail, and the positioning slide plate is slidably arranged on the fixed ruler through the cooperation of the first slide rail and the first slide groove.

4. The intracranial electrode insertion length measuring ruler according to claim 3, characterized in that: The electrode fixing device includes a fixed slide plate, and a second slide rail is provided on the fixed slide plate. The fixed slide plate is slidably arranged on the fixed ruler through the cooperation of the second slide rail and the first slide groove, and a raised portion is provided at a position corresponding to the fixed groove. A second locking mechanism is provided on the fixed slide plate, and the second locking mechanism is used to lock the position of the fixed slide plate on the fixed ruler. The electrode fixing mechanism is arranged on the fixed slide plate.

5. The intracranial electrode implantation length measuring ruler according to claim 4, characterized in that: The electrode fixing mechanism comprises a bracket, a connecting rod, a release cap, a limit plate, an electrode pressure plate and a spring; The bracket is an inverted U-shaped structure, and is fixed on the fixed slide; The connecting rod passes through the top plate of the bracket and the raised portion of the fixed slide plate; The release cap is connected to the upper end of the connecting rod and is located above the top plate of the bracket; The limit plate is connected to the middle part of the connecting rod and is located between the top plate of the bracket and the fixed slide plate; The electrode pressing plate is connected to the lower end of the connecting rod and is located below the raised portion of the fixed slide plate; The spring is passed through the connecting rod and is located between the top plate and the limiting plate of the bracket and is in a compressed state.

6. The intracranial electrode implantation length measuring ruler according to claim 5, characterized in that: The electrode pressing plate is an arc-shaped structure.

7. The intracranial electrode implantation length measuring ruler according to claim 5 or 6, characterized in that: The electrode pressing plate is a rubber piece.

8. The intracranial electrode implantation length measuring ruler according to claim 4, characterized in that: The first locking mechanism and the second locking mechanism both include positioning screws. The positioning screw of the first locking mechanism penetrates the positioning slide plate and is threadedly connected thereto, and the positioning screw of the second locking mechanism penetrates the fixing slide plate and is threadedly connected thereto.

9. The intracranial electrode implantation length measuring ruler according to claim 4, characterized in that: An electrode fixing mechanism is arranged on the positioning slide plate far away from the left end of the fixed ruler, and the electrode fixing mechanism is used to assist in fixing the electrode to be tested placed in the fixing groove.

10. A method for measuring the length of intracranial electrode implantation, characterized in that: Using the intracranial electrode insertion length measuring ruler according to any one of claims 1 to 9 comprises the following steps: S1. Place the unused puncture needle in the fixed groove on the fixed ruler, and make the needle tip touch the right end of the fixed groove; S2, slide the positioning slide close to the left end of the fixed ruler so that its left side is flush with the needle end of the puncture needle, and then lock it on the fixed ruler through the first locking mechanism provided thereon; S3, take out the unused puncture needle, place the electrode to be tested in the fixing groove, and make its front end touch the right end of the fixing groove, and then fix it in the fixing groove by the electrode fixing mechanism; S4. Place the used puncture needle in the measuring slot and place the surgical forceps close to the left end of the sliding ruler; S5, slide the positioning slide away from the left end of the fixed ruler so that its left side is flush with the tip of the puncture needle, and then lock it on the fixed ruler through the first locking mechanism provided thereon; S6. Adjust the limit sleeve of the electrode to be tested so that its right end is flush with the left side of the positioning slide away from the left end of the fixed ruler; S7. After the measurement is completed, take out the electrode to be tested.

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