A probe assembly for neurosurgery

Abstract

The present invention discloses a probe assembly for neurosurgery, including a probe, wherein the probe includes an outer sleeve and an inner probe that are slidably sleeved with each other, an enlarged portion is provided on the outer sleeve, a positioning end of the inner probe extends out of the outer sleeve, and an elastic member for resetting is also provided between the inner probe and the enlarged portion; and a pressure sensor is also provided, wherein the pressure sensor is used to detect the squeezing force during the movement of the inner probe. In the assembly provided by the present invention, the inner probe will first contact the bottom of the groove, and since the inner probe is sleeved on the outer sleeve, the inner probe will shrink into the outer sleeve after contacting the bottom of the groove, and the elastic member will squeeze the pressure sensor at this time. When the pressure sensor reaches the preset pressure, the mechanical arm stops squeezing the inner probe downward, thereby ensuring that the probe is inserted into the bottom of the groove and that the force of each insertion of the probe is the same.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and in particular to a probe assembly for neurosurgery. Background Art

[0002] With the advancement of science and medicine, the use of surgical robots for preoperative positioning, intraoperative position adjustment, and intraoperative instrument introduction in surgical operations is becoming more and more widespread and popular. The positioning accuracy detection of the surgical robot end is gradually becoming a necessary and important link.

[0003] The surgical robot includes a robotic arm, surgical navigation software, an optical tracking locator, a special instrument cart, a positioning marker, and a probe. The surgical navigation software reads the CT / MRI images of the patient's preoperative scan and creates a three-dimensional model of the brain. The doctor sets the surgical target and path based on his or her experience and judgment. The optical tracking locator automatically visually recognizes the feature marker blocks and quickly completes the robotic arm registration and patient registration, thereby establishing a conversion relationship between the image space and the robotic arm space. The robotic arm automatically and accurately locates and navigates the planned targets and paths based on the registration conversion results, and locks the joints after being in place, and loads surgical instruments to support surgical operations. Among them, the robotic arm registration establishes the conversion relationship between the robotic arm space and the optical tracking locator space, and the patient registration establishes the conversion relationship between the image space and the optical tracking locator space.

[0004] During surgery, it is generally necessary to install a surgical probe on the end of the robot's mechanical arm to determine the surgical position. In the prior art, positioning is mostly achieved by using a positioning marker in conjunction with a probe. The general operation is to attach multiple positioning markers to the patient's brain before surgery, which can achieve flexible contact patient registration. Each of the multiple positioning markers has a hemispherical groove. Since contact registration is required, the external reference point is at the bottom of the groove. Multiple positioning markers can be imaged on the preoperative image, and the coordinates of the external reference point in the image space can be obtained by marking the bottom of the marker point groove. The end of the probe fits tightly to the bottom of the groove, and the optical tracking positioning marker block on the probe is identified and tracked by the optical tracking locator, so that the coordinates of multiple external reference points in the optical tracking locator space can be obtained in sequence.

[0005] For example, the patent application with authorization announcement number CN100496429C and authorization announcement date June 10, 2009, entitled "Robotic Surgery Positioning Method Based on Optical Positioning of Surgical Navigation System", first designs three markers on the robot base to mark the two coordinate axis directions of the robot's reference coordinate system; then uses the optical tracker positioning pointer to extract these three markers, and allows the robot probe and the optical tracker positioning pointer to simultaneously collect the same coordinate point in space when docking: finally, through the spatial coordinate conversion algorithm, the coordinate exchange between the optical tracker and the robot system is realized; this application overcomes the defect that active medical robots cannot conveniently register marking points on the patient, and successfully integrates intelligent robotic arms and optical trackers for clinical practice, making surgical positioning more accurate and the success rate higher; the simple and effective spatial mapping algorithm solves the complex and cumbersome mapping relationship between the optical tracker, robot, and surgery. It is simple and practical to operate, and does not require a high surgical environment, which is convenient for actual promotion and use.

[0006] In the prior art, when obtaining the positioning coordinates, the probe needs to be inserted into and abut against the bottom of the groove of the positioning marker. However, since the positioning marker and the human body are both soft structures, and the prior art cannot control the extrusion pressure of the probe, the positioning work of the probe on the positioning marker itself will cause deformation of the corresponding human tissue. The different extrusion pressures each time will result in slight differences in each positioning work, affecting the accuracy of the surgery. Summary of the invention

[0007] The object of the present invention is to provide a probe assembly for neurosurgery to solve the above-mentioned deficiencies in the prior art.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A probe assembly for neurosurgery includes a probe, wherein the probe includes an outer sleeve and an inner probe that are slidably sleeved with each other, the outer sleeve is provided with an enlarged portion, the positioning end of the inner probe extends out of the outer sleeve, and an elastic member for resetting is also provided between the inner probe and the enlarged portion; and the probe assembly also includes a pressure sensor, which is used to detect the squeezing force during the movement of the inner probe.

[0010] The above-mentioned probe assembly for neurosurgery also includes a positioning marker, and the positioning marker is provided with a groove. During the insertion stroke of the probe, the positioning end of the inner probe is inserted into the inside of the groove.

[0011] The above-mentioned probe assembly for neurosurgery further includes an adapter, and the adapter is used to clamp the enlarged part.

[0012] The above-mentioned probe assembly for neurosurgery is provided with a locking rod on the inner probe, and a first locking mechanism is provided on the inner probe. The first locking mechanism includes a first radial rod, and an axial groove is provided on the first radial rod. When the adapter is installed on the enlarged part, the first locking mechanism has an unlocking position so that the locking rod passes axially through the axial groove.

[0013] In the above-mentioned probe assembly for neurosurgery, a collar is sleeved on the positioning end of the inner probe, and a rotating block is rotatably arranged on the collar. During the insertion stroke of the probe, the groove wall of the groove squeezes the rotating block to cause the rotating block to rotate.

[0014] The above-mentioned probe assembly for neurosurgery also includes a second locking mechanism, which includes a second radial rod and an L-shaped rod. The L-shaped rod is slidably connected to the second radial rod. The L-shaped rod extends into the interior of the inner probe through an open groove on the inner probe to lock the inner probe.

[0015] In the above-mentioned probe assembly for neurosurgery, a pushing rod is arranged on the collar, and during the positioning and insertion stroke of the probe, the pushing rod pushes the L-shaped rod to leave the interior of the inner probe.

[0016] In the above-mentioned probe assembly for neurosurgery, the radial dimension of the collar is smaller than the inner radial dimension of the groove.

[0017] In the above-mentioned probe assembly for neurosurgery, the L-shaped rod includes a vertical section and a horizontal section, and one end of the horizontal section extends into the interior of the inner probe.

[0018] In the above technical scheme, the present invention provides a probe assembly for neurosurgery. During the insertion stroke of the probe, the inner probe will first contact the bottom of the groove. Since the inner probe is sleeved on the outer sleeve, the inner probe will shrink into the outer sleeve after contacting the bottom of the groove. At this time, the elastic part will squeeze the pressure sensor. When the pressure sensor reaches the preset pressure, the robotic arm will stop squeezing the inner probe downward. In this way, the cooperation between the elastic part and the pressure sensor ensures that the probe is inserted into the bottom of the groove and that the force of the probe is the same each time it is inserted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1A schematic diagram of the structure of a probe provided by an embodiment of the present invention;

[0021] Figure 2 A partial structural schematic diagram of a first locking mechanism provided in another embodiment of the invention when it is in an unlocked state;

[0022] Figure 3 A schematic structural diagram of an inner probe positioning end provided by another embodiment of the invention;

[0023] Figure 4 A schematic diagram of the structure of a probe provided by another embodiment of the invention;

[0024] Figure 5 A schematic structural diagram of a positioning marker provided in yet another embodiment of the invention.

[0025] Description of reference numerals:

[0026] 1. Enlarged portion; 2. Outer sleeve; 3. Inner probe; 3.1. Positioning end; 4. Elastic member; 5. Pressure sensor; 6. First radial rod; 6.1. Locking end; 6.2. Pushing end; 7. Locking rod; 8. Axial groove; 10. Second radial rod; 11. L-shaped rod; 12. Horizontal section; 13. Pushing rod; 14. Ring; 14.1. Rotating block; 15. Positioning marker; 15.1 Groove; 16. Adapter. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1-5 The present invention discloses a probe assembly for neurosurgery, including a probe, wherein the probe includes an outer sleeve 2 and an inner probe 3 which are slidably connected to each other, the outer sleeve 2 is provided with an enlarged portion 1, a positioning end 3.1 of the inner probe 3 extends out of the outer sleeve 2, and an elastic member 4 for resetting is also provided between the inner probe 3 and the enlarged portion; and the pressure sensor 5 is also included, and the pressure sensor 5 is used to detect the squeezing force during the movement of the inner probe 3.

[0029] Specifically, the probe comprises an outer sleeve 2 and an inner probe 3 which are slidably sleeved with each other, that is, the outer wall of the middle and lower part of the inner probe 3 is sleeved inside the inner wall of the outer sleeve 2. Preferably, the outer sleeve 2 is cylindrical in shape, and an enlarged portion 1 is provided on the outer sleeve 2. Preferably, the enlarged portion 1 is cylindrical, and the radial dimension of the enlarged portion 1 is greater than the radial dimension of the outer sleeve 2. Preferably, the length of the inner probe 3 is greater than the length of the outer sleeve 2, that is, one end (upper end) of the inner probe 3 is located in the enlarged portion 1, and the other end (lower end) thereof extends out of the outer sleeve 2, and the extended end is a positioning end 3.1. Preferably, the positioning end 3.1 is a thinner tip, that is, the positioning end 3.1 extends out. The outer sleeve 2 is also provided with an elastic member 4 between the inner probe 3 and the enlarged portion 1. Preferably, the elastic member 4 is a spring, which is sleeved on the inner probe 3 and is used for elastic reset of the inner probe 3 after movement. Optionally, one end of the elastic member 4 abuts or is fixedly connected to the inner probe 3, and the other end abuts or is fixedly connected to the inner wall of the enlarged portion 1. It also includes a positioning marker 15 used in conjunction with the inner probe 3, and the positioning marker 15 includes a base for fitting to a positioning area of ​​the human body, and a groove 15.1 is provided on the base. The groove 15.1 has a certain elasticity. Preferably, the groove 15.1 is a hemispherical groove body that adapts to the positioning end 3.1 of the inner probe 3, and the hemispherical groove body is a small mouth and a large abdomen. The groove body, that is, the inner radial dimension of the groove is larger than the radial dimension of the mouth, the diameter of the mouth of the groove 15.1 is larger than the diameter of the positioning end 3.1, and the groove 15.1 is used for the positioning end 3.1 of the inner probe 3 to be inserted, and also includes a pressure sensor 5. Preferably, the pressure sensor 5 is located in the expanded portion 1. The pressure sensor 5 is used to detect the extrusion force between the positioning end 3.1 of the inner probe 3 and the groove 15.1. In fact, what is directly detected is the extrusion force received by the spring or the inner probe 3. Before the positioning end 3.1 is not in contact with the groove 15.1, the outer sleeve 2 and the inner probe 3 are maintained relatively still due to the presence of the elastic member 4 (the axial direction of the probe is constant during use). For example, when the axial direction is constant, the gravity is constant), and when the positioning end 3.1 is squeezed with the groove 15.1, under the squeezing force, the inner probe 3 is forced to move upward relative to the outer sleeve 2 axial direction, that is, the squeezing force of the inner probe 3 is converted into the elastic force of the elastic member 4. The pressure sensor 5 is used to detect the squeezing force of the elastic member 4, that is, to detect the squeezing force during the movement of the inner probe 3. The elastic member 4 squeezes the pressure sensor 5. When the pressure sensor 5 reaches a preset pressure such as 0.1N, it indicates that the inner probe 3 is successfully positioned. At this time, the squeezing is stopped. The pressure sensor 5 and its application are prior arts and will not be elaborated. In this way, it can be ensured that the positioning squeezing force of the probe on the human body is basically consistent each time, thereby improving the positioning accuracy.

[0030] It also includes an adapter 16, which is controlled by a robotic arm to achieve corresponding movements. The adapter 16 is used to clamp the enlarged portion 1 to control the positioning operation of the surgical instrument. During the insertion stroke of the probe, the positioning end 3.1 of the inner probe 3 will be squeezed to shrink toward the inside of the outer sleeve 2 when it touches the bottom of the groove 15.1. At this time, the elastic member 4 will be compressed to squeeze the pressure sensor 5 until the pressure sensor 5 reaches a preset pressure. The corresponding robotic arm will stop controlling the adapter to squeeze the inner probe 3 downward. In this way, the inner probe 3 shrinks inwardly and the elastic member 4 squeezes the pressure sensor 5, which ensures that the force of each insertion is the same. At the same time, the positioning end 3.1 of the inner probe 3 is inserted into the bottom of the groove 15.1 and fits tightly to the bottom of the groove 15.1.

[0031] An embodiment of the present invention provides a probe assembly for neurosurgery. During the insertion stroke of the probe, the inner probe 3 will first contact the bottom of the groove 15.1. Since the inner probe 3 is sleeved on the outer sleeve 2, the inner probe 3 will shrink into the outer sleeve 2 after contacting the bottom of the groove 15.1. At this time, the elastic member 4 will squeeze the pressure sensor 5. When the pressure sensor 5 reaches a preset pressure, the robotic arm will stop squeezing the inner probe 3 downward. In this way, the cooperation between the elastic member 4 and the pressure sensor 5 ensures that the probe is inserted into the bottom of the groove 15.1 and that the force of insertion of the probe is the same each time.

[0032] In another embodiment provided by the present invention, a locking rod 7 is provided on the inner probe 3, and the locking rod 7 is radially fixedly arranged on the inner probe 3. A first locking mechanism is provided on the expanded portion 1, and the first locking mechanism includes a first radial rod 6, and the first radial rod 6 is slidably arranged on the expanded portion 1, and the sliding direction is perpendicular to the axial direction of the inner probe 3. One end of the first radial rod 6 is a locking end 6.1, and the other end of the first radial rod 6 is a pushing end 6.2. The locking end 6.1 is located inside the expanded portion 1, and the pushing end 6.2 extends out of the expanded portion 1 through an outlet groove opened on the outer wall of the expanded portion 1. Externally, the pressure sensor 5 and the elastic member 4 are both located below the first radial rod 6, that is, on the side facing the positioning end 3.1. The locking end 6.1 of the first radial rod 6 is bent to enclose an axial groove 8. For example, if the locking end 6.1 of the first radial rod 6 is square-wave shaped, the recessed portion on the square-wave shape is the axial groove 8. A spring (not shown in the figure) is connected to the first radial rod 6. One end of the spring is connected to the first radial rod 6, and the other end is connected to the inner wall of the enlarged portion 1. The spring is used for elastic reset of the first radial rod 6. The first locking mechanism has a locked state and an unlocked state. In the locked state, That is, when the adapter does not clamp the expanded portion 1 at this time, under the action of the spring, the pushing end 6.2 of the first radial rod 6 extends out of the expanded portion 1 through the outlet groove on the expanded portion 1, and the rod member of its locking end 6.1 abuts against the top of the locking rod 7 (the side away from the positioning end 3.1), that is, the locking end 6.1 blocks the axial movement path of the first radial rod 6 so that the inner probe 3 cannot move axially to lock the inner probe 3. In the unlocked state, that is, when the adapter clamps the expanded portion 1 at this time, the inner wall of the adapter 16 fits the outer wall of the expanded portion 1, and the inner wall of the adapter 16 pushes the pushing end 6.2 into The inner probe 3 is inserted into the interior of the enlarged portion 1 and squeezes the spring, that is, the first radial rod 6 performs a linear motion. At this time, the axial groove 8 on the first radial rod 6 is axially located above the locking rod 7, so that the locking rod 7 can axially pass through the axial groove 8, that is, at this time, the inner probe 3 can move axially. The advantage of setting the first locking mechanism in this way is that the inner probe 3 is passively locked by the first locking mechanism before the operation begins, so that the inner probe 3 will not move axially due to its own gravity or other external forces, causing the elastic member 4 to squeeze the pressure sensor 5, thereby causing the data of the pressure sensor 5 to be inaccurate during the operation, thereby reducing the probe positioning accuracy.

[0033] In another embodiment provided by the present invention, a collar 14 is slidably sleeved on the positioning end 3.1 of the inner probe 3, and a rotating block 14.1 is provided on the collar 14. The rotating block 14.1 has a certain elasticity. Preferably, a rotating block 14.1 is provided on each of the opposite sides of the collar, or a plurality of rotating blocks 14.1 are arranged in an array in the circumferential direction, and the rotating block 14.1 is rotatably connected to the bottom wall of the collar through a rotating shaft. Preferably, the rotating block is L-shaped, and the L-shaped rotating block includes a vertical block and a horizontal block. The rotating shaft is located on the horizontal block, and the rotating block is The L-shape fits in the edge area of ​​the collar, so that the rotating block will be blocked by the collar 14 and can only be rotated downward to escape from the collar. The color of the outer side surface of the vertical section of the rotating block 14.1 is a bright color that is easy to observe, such as yellow. In this way, when the rotating block fits on the outside of the collar 14, the bright color of the outer side surface of the vertical section can be observed. Since the groove 15.1 is a structure in which the inner radial dimension is larger than the radial dimension of the mouth, the radial dimension of the collar 14 and the rotating block 14.1 as a whole is smaller than the inner radial dimension of the groove and larger than the radial dimension of the groove mouth. The radial dimension of the collar 14 itself is smaller than the radial dimension of the mouth of the groove 15.1. After the probe is inserted into the groove 15.1, the collar 14 and the rotating block 14.1 will also be squeezed into the groove 15.1 due to the elasticity of the groove 15.1. When the probe completes the positioning, the robot arm will pull the probe upward to leave the positioning marker 15. Since the rotating block 14.1 is rotatably connected to the collar, the side wall of the groove 15.1 will block the upward movement of the rotating block 14.1, so that the rotating block 14.1 will be forced to rotate, and the collar will After the probe is out of the groove 15.1, since the outer side surface of the vertical section of the rotating block 14.1 is bright yellow, the side surface is facing downward and cannot be directly observed after the rotation. The doctor can observe the rotation of the rotating block 14.1 with the naked eye, which also indicates that the probe has been positioned. The role of the collar 14 is that it makes the positioning of the probe more accurate through the cooperation with the positioning marker 15. When the probe is positioned outside the groove 15.1, the doctor can also observe that the collar 14 is still on the positioning end 3.1, which can also warn the doctor whether to reposition the probe. In this embodiment, in the initial state, that is, the state in which the rotating block 14.1 is attached to the collar 14, it can be completed by friction.

[0034] In another embodiment provided by the present invention, a second locking mechanism is further included, wherein the second locking mechanism includes a second radial rod 10 and an L-shaped rod 11, wherein the second radial rod 10 is fixedly connected to the inner wall of the enlarged portion 1, and the L-shaped rod 11 is radially slidably connected to the second radial rod 10, and a spring (not shown in the figure) is provided on the L-shaped rod for elastic reset of the L-shaped rod. Preferably, the L-shaped rod 11 includes a vertical section and a horizontal section 12, wherein the horizontal section is Figure 5A section in the horizontal direction, the vertical section radially slides, that is, the sliding connection in the horizontal direction in the figure is on the second radial rod 10, an axial open groove is provided on the outer wall of the inner probe 3, a section of the horizontal section 12 is connected to the vertical section, and the other end is located in the open groove. Preferably, a wedge-shaped surface is provided on the other end of the horizontal section 12. Before the probe enters the groove 15.1, its second locking mechanism has locked the inner probe 3 because the wedge-shaped surface is inserted into the open groove. A push rod 13 is provided on the collar 14 on the positioning end 3.1 of the inner probe 3. The push rod 13 extends through the open groove on the inner probe 3, and the other end of the push rod 13 is a wedge-shaped surface. During the stroke of the inner probe 3 inserted into the groove 15.1, since the rotating block 14.1 of the collar 14 and the groove 15.1 are both elastic The ring will be squeezed into the groove 15.1, and before being squeezed into the groove 15.1, the ring 14 will be forced to move axially upward (away from the side of the positioning end). At this time, the ring 14 will drive the push rod 13 to move upward. The movement of the push rod 13 will cause its top end to squeeze the wedge surface on the horizontal section 12. Since the L-shaped rod 11 is slidably connected to the second radial rod 10, one end of the horizontal section 12 will move from the inside of the inner probe 3 to the outside of the inner probe 3. In this way, the inner probe 3 is unlocked and the inner probe 3 can shrink inward to continue positioning. The purpose of such a setting is that through the cooperation between the ring 14 and the second locking mechanism, the probe can achieve the unlocking effect during the stroke of inserting the bottom of the groove 15.1, which can also ensure that the locked state can be released only when the inner probe 3 enters the groove 15.1. In this embodiment, the position of the ring 14 on the inner probe 3 is maintained by friction, that is, the ring 14 does not move axially without external force, and can move axially with external force. This function can be achieved by an elastic ring on the inner ring surface or a transition fit, which is a prior art and will not be elaborated.

[0035] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A probe assembly for neurosurgery, comprising a probe, characterized in that: The probe comprises an outer sleeve and an inner probe which are slidably sleeved with each other, the outer sleeve is provided with an enlarged portion, the positioning end of the inner probe extends out of the outer sleeve, and an elastic member for resetting is further provided between the inner probe and the enlarged portion; It also includes a pressure sensor, which is used to detect the squeezing force during the movement of the inner probe, and a positioning marker, which is provided with a groove. During the insertion stroke of the probe, the positioning end of the inner probe is inserted into the groove, and a ring is sleeved on the positioning end of the inner probe. A rotating block is rotatably provided on the ring, and the rotating block of the ring and the groove are both made of elastic material. When the probe completes the positioning, the robot arm will pull the probe upward to leave the positioning marker, and the rotating block is rotatably connected to the ring. The side wall of the groove will block the upward movement of the rotating block, and the rotating block will be forced to rotate, and the ring will be out of the groove. The collar is provided with a rotating block on opposite sides, the rotating block is rotatably connected to the bottom wall of the collar through a rotating shaft, the rotating block is L-shaped, the L-shaped rotating block includes a vertical block and a horizontal block, the rotating shaft is located on the horizontal block, the rotating block is fitted to the edge area of ​​the collar with its L-shape, the color of the outer side surface of the vertical section of the rotating block is bright and easy to observe, and after the rotating block rotates, the outer side surface faces downward and cannot be directly observed, The second locking mechanism also includes a second radial rod and an L-shaped rod, the L-shaped rod is slidably connected to the second radial rod, the L-shaped rod extends into the interior of the inner probe through an open groove on the inner probe to lock the inner probe, a push rod is provided on the collar, and during the positioning and insertion stroke of the probe, the push rod pushes the L-shaped rod to leave the interior of the inner probe, the radial size of the collar and the rotating block as a whole is smaller than the internal radial size of the groove and larger than the radial size of the groove mouth, the radial size of the collar itself is smaller than the radial size of the groove mouth, the L-shaped rod includes a vertical section and a horizontal section, one end of the horizontal section extends into the interior of the inner probe, An axial open groove is provided on the outer wall of the inner probe, one section of the horizontal section is connected to the vertical section, and the other end is located in the open groove, and a wedge-shaped surface is provided on the other end of the horizontal section. Before the probe enters the groove, its second locking mechanism has already locked the inner probe because the wedge-shaped surface is inserted into the open groove, and the push rod extends through the open groove on the inner probe. During the stroke of the inner probe inserted into the groove, the ring will be squeezed into the groove, and before being squeezed into the groove, the ring will be forced to move axially upward, at this time, the ring will drive the push rod to move upward, and the movement of the push rod will cause its top end to squeeze the wedge-shaped surface on the horizontal section, and since the L-shaped rod is slidably connected to the second radial rod, one end of the horizontal section will move from the inside of the inner probe to the outside of the inner probe, and the inner probe will be unlocked, and the inner probe can shrink inward to continue positioning.

2. The neurosurgery probe assembly according to claim 1, characterized in that: Also included is an adapter, which is used to clamp the enlarged part.

3. The neurosurgery probe assembly according to claim 2, characterized in that: A locking rod is provided on the inner probe, and a first locking mechanism is provided on the inner probe. The first locking mechanism includes a first radial rod, and an axial groove is provided on the first radial rod. When the adapter is installed to the enlarged part, the first locking mechanism has an unlocking position so that the locking rod passes axially through the axial groove.

4. The neurosurgery probe assembly according to claim 3, characterized in that: The first locking mechanism includes a locked state and an unlocked state. In the locked state, the first radial rod blocks the axial displacement of the inner probe. In the unlocked state, the locking rod can pass through the axial slot.

Images