Stereotactic device

Abstract

The application discloses a stereoscopic directional device, which comprises a base, a connector, a guide rail, a support and a guide, wherein the base is used for being fixed to a head; one end of the connector is pivotally arranged on the base, and the connector can be detached relative to the base; the guide rail is ball-jointedly arranged on the other end of the connector; one end of the support is slidingly arranged on the guide rail; the guide is embedded on the other end of the support, and the guide is used for guiding the direction of a puncture channel of a stereoscopic directional puncture operation. The base is used for fixing the stereoscopic directional device to the head, the connector is detachably connected with the base, so that the connector can be detached from the base before a CT scanning operation is completed, and the weight of the head of a patient can be reduced. The guide is installed on the guide rail through the support, the guide can move relative to the guide rail, the flexibility and the working range of the stereoscopic directional device can be further improved, and the puncture operation can be accurately, flexibly and quickly positioned. The stereoscopic directional device has the advantages of simple structure, convenient use and low cost.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a stereotactic device. Background Technology

[0002] Stereotactic head frames are a basic tool commonly used in minimally invasive neurosurgical procedures and are widely used in the treatment of non-functional neurological diseases.

[0003] The biggest advantage of traditional stereotactic head frames is their high positioning accuracy, typically reaching sub-millimeter levels. However, traditional stereotactic head frames also have significant drawbacks: cumbersome operation. In clinical practice, doctors need to fix the metal stereotactic head frame with a scale to the patient's head using four specialized large pins. During fixation, at least two doctors need to work closely together to complete a series of procedures, including head frame alignment, local anesthesia, and pin fixation, consuming considerable manpower and time. The accurate installation of the stereotactic head frame often directly determines the success of the surgery, and its accuracy significantly affects the insertion point of the puncture needle.

[0004] Currently, traditional stereotactic headgear installation methods typically rely on the doctor's visual assessment of whether the headgear is centered and level, depending entirely on the doctor's clinical experience, making it impossible to quantitatively assess the precision of the surgery. Furthermore, patients need to wear a heavy metal headgear throughout the CT scan and until the surgery is complete, and the headgear's fixation pins can cause significant pain during treatment. Additionally, stereotactic headgear is very expensive; a complete set of sophisticated domestic stereotactic brain equipment costs over 200,000 yuan, while imported equipment can reach millions of yuan, severely limiting its widespread use in primary hospitals. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art that patients need to wear a traditional stereotactic head frame until the CT scan surgery is completed, and to provide a stereotactic device.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A stereotactic device for stereotactic puncture surgery includes: a base, a connector, a guide rail, a support, and a guide. The base is used to fix the device to the head. One end of the connector is pivotally mounted on the base and is detachable relative to the base. The guide rail is ball-jointed to the other end of the connector. One end of the support is slidably mounted on the guide rail. The guide is embedded in the other end of the support and is used to guide the direction of the puncture channel in the stereotactic puncture surgery.

[0008] In this design, the stereotactic device is fixed to the head using a base, and the connector is detachably connected to the base. This allows the connector to be removed from the base before the CT scan surgery is completed, reducing the load on the patient's head. The connector is pivotally mounted on the base, allowing it to rotate relative to the base, thus increasing the working range of the stereotactic device. The guide rail is ball-jointed with the connector, allowing it to swing flexibly relative to the connector, further enhancing the flexibility and working range of the stereotactic device. The guide is mounted to the slide rail via a bracket, allowing it to move relative to the slide rail, further improving the flexibility and working range of the stereotactic device and facilitating precise, flexible, and rapid positioning during puncture surgery. The stereotactic device has a simple structure, is easy to use, and is low in cost.

[0009] Preferably, the axis of the guide is parallel to the axis of the guide rail.

[0010] In this solution, by adopting the above structure, the axis of the guide is parallel to the axis of the guide rail, which facilitates the control of the puncture channel direction during the puncture surgery.

[0011] Preferably, one end of the connector is sleeved on the connecting shaft of the base, and the stereo orientation device further includes a tightening nut, which is screwed onto the connecting shaft and is used to press and fix the connector.

[0012] In this solution, by adopting the above structure and using a tightening nut to fix the connector, the structure is simple, the operation is convenient, and the safety and reliability are guaranteed.

[0013] Preferably, the connector is provided with a small scale, and the upper side of the base is provided with a large scale. The small scale cooperates with the large scale to display the rotation angle of the connector relative to the base.

[0014] In this solution, by adopting the above structure and using the combination of small and large dials, the rotation angle of the connector relative to the base can be precisely adjusted, which facilitates the positioning of the puncture surgery.

[0015] Preferably, the other end of the connector is provided with a ball seat, and the end of the guide rail is provided with a connecting ball head, which is embedded in the ball seat.

[0016] In this solution, by adopting the above structure, the connecting ball head is embedded in the ball seat, which facilitates the stable swing of the connector around the ball seat. The structure is simple, easy to operate, and safe and reliable.

[0017] Preferably, the stereotactic device further includes a first fastening bolt, which passes through the ball seat and is used to press and fix the connecting ball head;

[0018] And / or, the connecting ball head and the ball seat are interference-fitted.

[0019] In this solution, by adopting the above structure and using the first fastening bolt to fix the ball head, the structure is simple, easy to operate, and safe and reliable.

[0020] The interference fit between the ball head and the ball seat allows the connector to stop automatically when adjusting its position, preventing it from being too flexible and making it easier to adjust.

[0021] Preferably, the stereotactic device further includes a second fastening bolt, which is screwed onto the bracket and is used to fix the bracket relative to the guide rail.

[0022] And / or, the bracket is clearance-fitted with the guide rail;

[0023] The guide is connected to the bracket via a slot structure.

[0024] In this solution, by adopting the above structure and using the second fastening bolt to fix the bracket, the structure is simple, the operation is convenient, and the safety and reliability are guaranteed.

[0025] The bracket and guide rail are fitted with a clearance fit, which allows for flexible adjustment of the bracket position.

[0026] The guide and the bracket are connected by a slot structure, which facilitates the quick installation of the guide and can also improve the installation position accuracy of the guide and reduce errors.

[0027] Preferably, the stereo orientation device further includes an auxiliary measuring tool for determining the position of the guide rail relative to the connector.

[0028] In this solution, by adopting the above structure, the auxiliary measuring tool can further improve the positional accuracy of the guide rail, avoid relying on the operator's experience to judge the positional accuracy of the guide rail, and is simple to operate and easy to use.

[0029] Preferably, the auxiliary measuring tool includes:

[0030] A chassis for mounting to a ball seat of the connector;

[0031] A rotating disk that can rotate relative to the chassis;

[0032] An arched guide rail is pivotally mounted on the rotating disk and is capable of swinging relative to the rotating disk.

[0033] A slider adapter, which is sleeved on the slider pointer, and the slider pointer slides on the arched guide rail;

[0034] A side dial is provided on the side of the arched guide rail, and the side dial is used to indicate the angle of swing of the arched guide rail relative to the rotating disk.

[0035] In this solution, by adopting the above structure, a chassis is used to embed the ball seat into the connector. The auxiliary measuring tool is fixed in relative position to the connector. The guide rail is mounted to the arched guide rail via a slider adapter. The arched guide rail is set on the rotating disk, so the rotation angle of the guide rail can be converted into the rotation angle of the rotating disk, and the swing angle of the guide rail can be converted into the position of the slider relative to the arched guide rail and the position of the arched guide rail relative to the side scale. The auxiliary measuring tool decomposes the position of the guide rail into the easily measurable positions of the rotating disk, the slider adapter, and the arched guide rail, which simplifies the positioning of the guide rail and improves its positioning accuracy.

[0036] Preferably, the chassis has an arc-shaped groove, and the ball seat of the connector is embedded in the arc-shaped groove;

[0037] And / or, the chassis is provided with a first angle scale line, and the rotating disk is provided with a second angle scale line, the second angle scale line cooperating with the first angle scale line to show the rotation angle of the rotating disk relative to the chassis;

[0038] And / or, the arched guide rail has a third angle scale line, and the slider adapter has a slider pointer that cooperates with the third angle scale line to display the rotation angle of the slider adapter relative to the arched guide rail.

[0039] In this solution, by adopting the above structure, the ball seat of the connector is embedded in the arc-shaped slot, which facilitates disassembly, ensures a firm connection, and makes it easy to use.

[0040] The second angle gradation line works in conjunction with the first angle gradation line to display the rotation angle of the rotating disk relative to the chassis, thereby indicating the rotation angle of the guide rail and realizing the measurement of the guide rail rotation angle.

[0041] The slider pointer works in conjunction with the third angle scale to display the rotation angle of the slider adapter relative to the arched guide rail, and the rotation angle of the arched guide rail relative to the side scale indicates the deflection angle of the guide rail, thus realizing the measurement of the guide rail swing angle.

[0042] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0043] The positive and progressive effects of this invention are as follows:

[0044] This invention utilizes a base to fix a stereotactic device to the head, with a detachable connector to the base. This allows the connector to be removed from the base before the CT scan surgery is completed, reducing the load on the patient's head. The connector is pivotally mounted on the base, allowing it to rotate relative to the base, thus increasing the working range of the stereotactic device. A ball joint between the guide rail and the connector allows the guide rail to swing flexibly relative to the connector, further enhancing the flexibility and working range of the stereotactic device. The guide is mounted to the slide rail via a bracket, allowing it to move relative to the slide rail, further improving the flexibility and working range of the stereotactic device, facilitating precise, flexible, and rapid positioning during puncture surgery. The stereotactic device has a simple structure, is easy to use, and is low in cost. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural diagram of a stereotactic device according to an embodiment of the present invention.

[0046] Figure 2 for Figure 1 A schematic diagram of the connector and base in a stereotactic device.

[0047] Figure 3 for Figure 1 A schematic diagram of the connector and bracket in a stereotactic device.

[0048] Figure 4 for Figure 1 A schematic diagram of the auxiliary measuring tool in a stereotactic device.

[0049] Figure 5 for Figure 4 A schematic diagram of the rotating disk and the base in the auxiliary measuring tool.

[0050] Figure 6 for Figure 4 A schematic diagram of the structure of a partial cross-section of an auxiliary measuring tool.

[0051] Figure 7 for Figure 4 A schematic diagram of the slider adapter and arched slide rail in the auxiliary measuring tool.

[0052] Figure 8 for Figure 4 A schematic diagram of the auxiliary measuring tool installed on the connector.

[0053] Figure 9 for Figure 1 A schematic diagram of the stereotactic device in use.

[0054] Explanation of reference numerals in the attached figures:

[0055] Stereoscopic device 100

[0056] Base 11

[0057] Connecting shaft 111

[0058] Large dial 112

[0059] CT marker 113

[0060] Connector 12

[0061] Small dial 121

[0062] 122 ball seat

[0063] Guide rail 13

[0064] Connecting ball head 131

[0065] Bracket 14

[0066] Guide 15

[0067] Tighten nut 16

[0068] First fastening bolt 17

[0069] Second fastening bolt 18

[0070] Auxiliary measuring tools 20

[0071] Chassis 21

[0072] Arc-shaped card slot 211

[0073] First angle engraving line 212

[0074] Rotary disk 22

[0075] Second angle engraving line 221

[0076] Rotary disk screw 222

[0077] Arched guide rail 23

[0078] Third angle engraving line 231

[0079] Slider Adapter 24

[0080] Slider pointer 241

[0081] Side dial 25

[0082] 26 Set screws

[0083] Locking screw 27

[0084] The patient's head 90

[0085] Lesion 91 Detailed Implementation

[0086] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0087] like Figures 1-9 As shown, this embodiment includes a stereotactic device 100 for stereotactic puncture surgery. The stereotactic device 100 includes: a base 11, a connector 12, a guide rail 13, a support 14, and a guide 15. The base 11 is used to fix it to the head; one end of the connector 12 is pivotally mounted on the base 11, and the connector 12 is detachable relative to the base 11; the guide rail 13 is ball-jointed to the other end of the connector 12; one end of the support 14 is slidably mounted on the guide rail 13; the guide 15 is embedded in the other end of the support 14, and the guide 15 is used to guide the direction of the puncture channel in the stereotactic puncture surgery. By using the base 11 to fix the stereotactic device 100 to the head, and the connector 12 being detachably connected to the base 11, the patient can remove the connector 12 from the base 11 before the CT scan surgery is completed, reducing the load on the patient's head. The connector 12 is pivotally mounted on the base 11, allowing the connector 12 to rotate relative to the base 11, which increases the working range of the stereotactic device 100. The guide rail 13 is ball-jointed with the connector 12, allowing the guide rail 13 to swing flexibly relative to the connector 12, further improving the flexibility and working range of the stereotactic device 100. The guide 15 is mounted to the slide rail via the bracket 14, and the guide 15 can move relative to the slide rail, further improving the flexibility and working range of the stereotactic device 100, facilitating precise, flexible, and rapid positioning during puncture surgery. The stereotactic device 100 has a simple structure, is easy to use, and is low in cost.

[0088] Figure 1 The auxiliary measuring tool 20 is not shown. The base 11 is also provided with CT markers 113. The design of CT markers 113 on the base 11 can be used to assist the surgical path planning software in identifying the installation orientation of the base 11. Based on the identification of CT markers 113, the influence of installation errors on the registration of the coordinate system of the base 11 and the patient coordinate system can be eliminated, thereby improving the clinical guidance accuracy of orientation.

[0089] The rotation of connector 12 relative to base 11, and the rotation of guide rail 13 relative to connector 12 about its own axis, allow guide 15 to be adjusted in a wide range of positions relative to base 11, improving the flexibility of installation of stereotactic device 100.

[0090] In one implementation, the axis of the guide 15 is parallel to the axis of the guide rail 13. This parallelism facilitates control of the puncture channel direction during the puncture procedure.

[0091] like Figure 2As shown, one end of the connector 12 is sleeved on the connecting shaft 111 of the base 11. The stereo orientation device 100 also includes a tightening nut 16, which is screwed onto the connecting shaft 111 and is used to press and fix the connector 12. Using the tightening nut 16 to fix the connector 12 is simple in structure, convenient in operation, and safe and reliable.

[0092] exist Figure 2 In this design, connector 12 is equipped with a small dial 121, and a large dial 112 is located on the upper side of base 11. The small dial 121 and the large dial 112 cooperate to display the rotation angle of connector 12 relative to base 11. By using the cooperation of the small dial 121 and the large dial 112, the rotation angle of connector 12 relative to base 11 can be precisely adjusted, facilitating positioning during puncture surgery.

[0093] The other end of the connector 12 is provided with a ball seat 122, and the end of the guide rail 13 is provided with a connecting ball head 131, which is embedded in the ball seat 122. By using the connecting ball head 131 embedded in the ball seat 122, the connector 12 can swing stably around the ball seat 122. The structure is simple, the operation is convenient, and it is safe and reliable.

[0094] The stereotactic device 100 also includes a first fastening bolt 17, which passes through the ball seat 122 and is used to press and fix the ball head 131. The ball head 131 is fixed by the first fastening bolt 17, which has a simple structure, is easy to operate, and is safe and reliable.

[0095] The ball head 131 and the ball seat 122 are interference-fitted. When adjusting the position of the guide rail 13 relative to the connector 12, the guide rail 13 can be made to stop at any point, which can prevent the guide rail 13 from being too flexible and make it easier to adjust the guide rail 13.

[0096] The stereotactic device 100 also includes a second fastening bolt 18, which is screwed onto the bracket 14 and used to fix the bracket 14 relative to the guide rail 13. The bracket 14 is fixed by the second fastening bolt 18, which has a simple structure, is easy to operate, and is safe and reliable.

[0097] The bracket 14 and the guide rail 13 are fitted with a clearance fit; the clearance fit between the bracket 14 and the guide rail 13 facilitates flexible adjustment of the position of the bracket 14.

[0098] exist Figure 3 In this design, the guide 15 and the bracket 14 are connected via a slot structure. This slot structure facilitates quick installation of the guide 15, improves the accuracy of its installation position, and reduces errors. The slot structure also allows for easy installation and disassembly of the guide 15, enhancing the convenience of use.

[0099] exist Figures 4-8 In this device, the stereo orientation device 100 also includes an auxiliary measuring tool 20, which is used to determine the position of the guide rail 13 relative to the connector 12. The auxiliary measuring tool 20 can further improve the positional accuracy of the guide rail 13, avoid relying on the operator's experience to judge the positional accuracy of the guide rail 13, and is simple to operate and convenient to use.

[0100] The auxiliary measuring tool 20 is used to adjust the swing angle of the guide rail 13. The three rotational degrees of freedom of the ball head 131 connected to the end of the guide rail 13 are decomposed so that each degree of freedom can be adjusted independently. The dial indicator is added to provide a quantitative reference for each swing offset, ensuring the accuracy of the stereotactic manual placement.

[0101] The auxiliary measuring tool 20 includes: a base 21, a rotating disk 22, an arched guide rail 23, a slider adapter 24, and a side scale 25. The base 21 is used to be embedded in the ball seat 122 of the connector 12. The rotating disk 22 is rotatable relative to the base 21. The arched guide rail 23 is pivotally mounted on the rotating disk 22 and is swayable relative to the rotating disk 22. The slider adapter 24 is slidably mounted on the arched guide rail 23 and is sleeved on the guide rail 13. The side scale 25 is located on the side of the arched guide rail 23 and is used to indicate the angle of sway of the arched guide rail 23 relative to the rotating disk 22. The base 21 is used to embed the ball seat 122 into the connector 12. The auxiliary measuring tool 20 is fixed in a relative position to the connector 12. The guide rail 13 is mounted to the arched guide rail 23 via the slider adapter 24. The arched guide rail 23 is set on the rotating disk 22, so the rotation angle of the guide rail 13 can be converted to the rotation angle of the rotating disk, and the swing angle of the guide rail 13 can be converted to the position of the slider relative to the arched guide rail 23 and the position of the arched guide rail 23 relative to the side scale 25. The auxiliary measuring tool 20 decomposes the position of the guide rail 13 into the position of the rotating disk 22, the position of the slider adapter 24, and the position of the arched guide rail 23 for easy measurement, which simplifies the positioning of the guide rail 13 and improves the positioning accuracy of the guide rail 13.

[0102] The chassis 21 has an arc-shaped slot 211, and the ball seat 122 of the connector 12 is embedded in the arc-shaped slot 211. By using the ball seat 122 of the connector 12 embedded in the arc-shaped slot 211, it is easy to disassemble, the connection is firm, and it is convenient to use.

[0103] The chassis 21 is provided with a first angle scale 212, and the rotating disk 22 is provided with a second angle scale 221. The second angle scale 221 cooperates with the first angle scale 212 to display the rotation angle of the rotating disk 22 relative to the chassis 21. The second angle scale 221 cooperates with the first angle scale 212 to display the rotation angle of the rotating disk 22 relative to the chassis 21, thereby indicating the rotation angle of the guide rail 13 and realizing the measurement of the rotation angle of the guide rail 13.

[0104] The arched arm of the arched guide rail 23 is provided with a third angle scale 231, and the slider adapter 24 has a slider pointer 241. The slider pointer 241 cooperates with the third angle scale 231 to display the rotation angle of the slider adapter 24 relative to the arched guide rail 23. The slider pointer 241 cooperates with the third angle scale 231 to display the rotation angle of the slider adapter 24 relative to the arched guide rail 23, thereby indicating the deflection angle of the guide rail 13 and realizing the measurement of the deflection angle of the guide rail 13.

[0105] Figure 1 The structure of the stereotactic device 100 is shown. The stereotactic device 100 includes a base 11, in which three symmetrically distributed CT markers 113 are pre-embedded. These CT markers 113 assist surgical path planning software in identifying the installation orientation of the base 11. The surface edge of the base 11 has circumferential angle markings, which cooperate with a small dial 121 on a connector 12 mounted on the base 11 to indicate the offset angle of the connector 12 relative to the base 11. Connector 12 is fixed to base 11 by a tightening nut; one end of connector 12 is fitted with a connecting ball head 131, which has three rotational degrees of freedom relative to connector 12, and the three degrees of freedom of connecting ball head 131 are locked and unlocked by a first fastening bolt 17; a guide rail 13 is installed on connecting ball head 131, and a bracket 14 is installed on the guide rail 13, which can slide on the guide rail 13 and is locked by a second fastening bolt 18; a guide 15 is mounted on one end of bracket 14, and the axial direction of the guide 15 is the direction of stereo orientation; the stereo orientation device 100 has four adjustable degrees of freedom, wherein the rotational degree of freedom of connector 12 relative to base 11 and the rotational degree of freedom of guide rail 13 relative to connector 12 about its own axis together determine the position of the axis of guide 15 relative to base 11; the two swinging degrees of freedom of guide rail 13 relative to connector 12 determine the swing angle of the axis of guide 15 relative to base 11.

[0106] like Figure 2 The assembly structure of connector 12 and base 11 is shown. When the origin line of the small dial 121 on connector 12 coincides with the zero line of the scale on the surface of base 11, it is the initial assembly position of connector 12 relative to base 11.

[0107] like Figure 3 The guide 15 and the bracket 14 have a slot structure. The mounting method is as follows: first, press the outer circumference protrusion of the guide 15 into the slot of the bracket 14, and then rotate the guide 15 to the limit position of the slot of the bracket 14.

[0108] like Figure 4The structure of the auxiliary measuring tool 20 is shown. This auxiliary measuring tool 20 is used to adjust three degrees of freedom of the portable stereotactic device 100, namely the rotational degree of freedom of the guide rail 13 mounted on the connecting ball head 131 relative to the connector 12 about its own axis, and two other oscillating degrees of freedom. Figure 4 In the chassis 21, the central slot is used to mount the connector 12 of the stereotactic device 100; the arc-shaped surface of the chassis 21 has angle markings, and its outer edge has an arc-shaped slot 211 structure. The rotating disk 22 is assembled with the chassis 21 through the arc-shaped slot 211 and can rotate relative to the chassis 21 along the arc-shaped slot 211. Its rotation is locked by a rotating disk screw 222; the arc-shaped surface of the rotating disk 22 has angle markings, which cooperate with the angle markings of the chassis 21 to indicate the rotation angle of the rotating disk 22 relative to the chassis 21; both ends of the rotating disk 22 are hinged to the arched guide rail 23; the side scale 25 is mounted on... Mounted at one end of the rotating disk 22, it engages with the locking pin 26 of the arched arm of the arched guide rail 23 to indicate the angle of rotation of the arched guide rail 23 about its mounting axis; the mounting axis of the arched guide rail 23 passes through the rotation center of the rotating disk 22; the rotation of the arched guide rail 23 relative to the rotating disk 22 is locked by a locking screw 27; the slider adapter 24 is mounted on the arched guide rail 23 and can slide on the arched guide rail 23; the slider pointer 241 on the slider adapter 24 indicates the scale of the arched guide rail 23, which indicates the angle of rotation of the axis of the adapter hole on the slider adapter 24 about the rotation center of the rotating disk 22.

[0109] like Figure 5 The assembly of the rotating disk 22 and the base 21 is shown. The initial assembly position of the rotating disk 22 relative to the base 21 is when the zero mark of the rotating disk 22 coincides with the zero mark of the base 21.

[0110] like Figure 6 The hinge door lock mechanism is shown. When the zero mark of the side dial 25 is perpendicular to the space of the rotating disk 22, and the locking pin 26 of the arched arm of the arched guide rail 23 indicates the zero mark of the side dial 25, it is the initial assembly position of the hinge door lock mechanism. At this time, the surface of the arched guide rail 23 is perpendicular to the space of the rotating disk 22.

[0111] like Figure 7 The structure of the slider adapter 24 is shown. The adapter hole of the slider adapter 24 is used to mate with the guide rail 13 of the portable stereoscopic device 100; when the slider pointer 241 of the slider adapter 24 points to the zero mark of the arched guide rail 23, it is the initial assembly position of the slider adapter 24 relative to the arched guide rail 23. At this time, the axis of the adapter hole of the slider adapter 24 is perpendicular to the disk surface space of the rotating disk 22; the locking pin 26 assists the slider adapter 24 in sliding and locking on the arched guide rail 23.

[0112] like Figure 8The assembly of the ball joint mechanism of the auxiliary measuring tool 20 for adjusting the position of the guide rail 13 is shown. The ball joint mechanism of the guide rail 13 includes a connector 12 of the stereoscopic orientation device 100, a first fastening bolt 17, a connecting ball joint 131, and the guide rail 13. The connector 12 is installed in the central slot of the chassis 21. The slider adapter 24 is nested with the guide rail 13 and secured to the arched guide rail 23. The initial assembly position of the ball joint mechanism of the guide rail 13 on the auxiliary measuring tool 20 is when the rotating disk 22 is in the initial assembly position relative to the chassis 21, the hinge lock mechanism, and the slider adapter 24 are in the initial assembly position relative to the arched guide rail 23.

[0113] like Figure 9 The effect of mounting the stereotactic device 100 on the patient's head 90 is shown. After adjustment by the auxiliary measuring instrument 20 and rotational adjustment of the connector 12 relative to the base 11, the axis of the guide 15 is pointed to the center of the lesion 91.

[0114] As one method of use: a base 11 with CT markers 113 can be pre-installed and fixed to the bone region of the patient's head 90 using bone screws; a CT scan of the patient's head 90 is performed while carrying the installed base 11; based on the mechanism parameters of the portable stereotactic device 100 and the scanned CT image data, surgical path planning software is used to identify the location of the CT markers 113 on the base 11 and the patient's lesion 91, establishing a stereotactic puncture channel; the three rotational offsets of the puncture channel relative to the initial installation position of the stereotactic device 100 at the connecting ball head 131 and the rotational offset of the connector 12 relative to the base 11 are calculated through inverse kinematics calculation; during the operation, the guide rail ball head mechanism is first assembled, the first fastening bolt 17 is loosened, and the guide rail 13 and the connecting ball head 131 are assembled on the auxiliary measuring tool 20, and the connecting ball head 131 of the guide rail 13 is adjusted to the initial assembly position of the auxiliary measuring tool 20; according to the surgical path planning software... The three rotational offsets of the connecting ball head 131 are calculated, and the rotation angles of the rotating disk 22 of the auxiliary measuring tool 20 relative to the base 21, the rotation angle of the arched guide rail 23 around its mounting axis, and the rotation angle of the adapter hole axis on the slider adapter 24 around the rotation center of the rotating disk 22 are adjusted in sequence. After the angles are adjusted in sequence, the first fastening bolt 17 is tightened, the slider adapter 24 is loosened, the guide rail ball head mechanism is removed from the auxiliary measuring tool 20, and then installed on the base 11. According to the rotational offset of the connector 12 relative to the base 11 calculated by the surgical path planning software, the offset angle of the connector 12 relative to the base 11 is adjusted, and then the tightening nut is tightened. The bracket 14 is installed on the guide rail 13, and the second fastening bolt 18 is tightened. Finally, the guide 15 is installed in the slot of the bracket 14, thus completing the stereotactic orientation. At this time, the axis of the guide 15 is the direction of the stereotactic puncture channel established by the surgical path planning software, and passes through the center of the lesion 91.

[0115] The guide rail ball joint mechanism can be understood as the component of the stereo orientation device 100 excluding the base 11 and the auxiliary measuring tool 20. The guide rail ball joint mechanism can be considered as a whole.

[0116] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A stereotactic device for stereotactic puncture surgery, characterized in that, The stereotactic device includes: Base, the base being used to secure to the head; A connector, one end of which is pivotally mounted to the base, and the connector is detachable relative to the base; The guide rail, wherein the guide rail ball is connected to the other end of the connector; A bracket, one end of which is slidably mounted on a guide rail; A guide, which is embedded at the other end of the support, is used to guide the direction of the puncture channel in the stereotactic puncture surgery; The stereo orientation device also includes an auxiliary measuring tool, which is used to determine the position of the guide rail relative to the connector; The auxiliary measuring tool includes: A chassis for mounting to a ball seat of the connector; A rotating disk that can rotate relative to the chassis; An arched guide rail is pivotally mounted on the rotating disk and is capable of swinging relative to the rotating disk. A slider adapter, which is sleeved on a slider pointer, and the slider pointer slides on the arched guide rail; A side dial is provided on the side of the arched guide rail, and the side dial is used to indicate the angle of swing of the arched guide rail relative to the rotating disk.

2. The stereotactic device as described in claim 1, characterized in that, The axis of the guide is parallel to the axis of the guide rail.

3. The stereotactic device as described in claim 1, characterized in that, One end of the connector is sleeved on the connecting shaft of the base. The stereo orientation device also includes a tightening nut, which is screwed onto the connecting shaft and is used to press and fix the connector.

4. The stereotactic device as described in claim 1, characterized in that, The connector is provided with a small scale, and the upper side of the base is provided with a large scale. The small scale cooperates with the large scale to display the rotation angle of the connector relative to the base.

5. The stereotactic device as described in claim 1, characterized in that, The other end of the connector is provided with a ball seat, and the end of the guide rail is provided with a connecting ball head, which is embedded in the ball seat.

6. The stereotactic device as described in claim 5, characterized in that, The stereotactic device further includes a first fastening bolt, which passes through the ball seat and is used to press and fix the connecting ball head. And / or, the connecting ball head and the ball seat are interference-fitted.

7. The stereotactic device as described in claim 1, characterized in that, The stereo orientation device further includes a second fastening bolt, which is screwed onto the bracket and is used to fix the bracket relative to the guide rail. And / or, the bracket is clearance-fitted with the guide rail; The guide is connected to the bracket via a slot structure.

8. The stereotactic device as described in claim 1, characterized in that, The chassis has an arc-shaped groove, and the ball seat of the connector is embedded in the arc-shaped groove; And / or, the chassis is provided with a first angle scale line, and the rotating disk is provided with a second angle scale line, the second angle scale line cooperating with the first angle scale line to show the rotation angle of the rotating disk relative to the chassis; And / or, the arched arm of the arched guide rail is provided with a third angle scale line, and the slider adapter has a slider pointer that cooperates with the third angle scale line to display the rotation angle of the slider adapter relative to the arched guide rail.

Images