Stereotactic system with frame

Abstract

The utility model discloses a stereotactic system with a frame. The stereotactic system comprises three sets of suites, namely a base ring, an arc-shaped bow and a lug ring. Wherein the ear ring comprises a male ring and a female ring which are coupled with each other and are respectively coupled with the base ring and the arc-shaped bow to realize target positioning and directional guiding; the two groups of mother rings are respectively provided with a 0-360-degree dial and are provided with inclined planes; second scales are arranged on the surface of the mother ring and provided with left and right marks. The diameter of the coupling part of the male ring and the female ring is gradually reduced from outside to inside, and the radial section is trapezoidal; the matching surfaces of the two groups of male rings and female rings are provided with reference marks corresponding to the second scales of the female rings, the back surface of the rod part is provided with a limiting groove, the bottom of the limiting groove is closed, and the male rings and the base are locked into a whole through a limiting screw or a one-way buckle on the inner side surface of the base; the coupling part of the male ring and the female ring is also provided with a pair of detachable concave-convex buckles; the device can be simply and conveniently operated in any lateral position and in the operation of reversely installing the arc-shaped arch, is not easy to make mistakes, and is high in practicability.

Description

Technical Field

[0001] The utility model relates to a brain stereotactic technology, in particular to a framed stereotactic system. Background Art

[0002] A framed stereotactic system typically consists of a base ring assembly, an arc-shaped arch assembly, and two sets of earring assemblies that couple the two. The earring assemblies consist of a base, a male ring, and a female ring. The male and female rings couple to the base ring assembly and the arc-shaped arch assembly, respectively, to determine the three-dimensional coordinates of the target within the frame. Both the male and female rings consist of a ring portion and a stem portion. Two sets of male ring kits are arranged on both sides of the base ring in a mirror-symmetrical manner similar to "pq". The rod of the male ring can move longitudinally along the trapezoidal groove on the base to change the Z coordinate of the target, and can also move back and forth as a whole with the base in the trapezoidal groove of the base ring side frame to change the Y coordinate of the target. The rod of the female ring is placed in the trapezoidal groove of the arc bow and serves as a guide rail for the arc bow, supporting its left and right translation to change the X coordinate of the target. The arc bow kit includes an arc bow and a carriage attached to the arc bow and sliding along the circumference of the arc bow. The carriage is equipped with a puncture mechanism with a collimating function. The target of its puncture is the target determined by the frame. Adjusting the fore-and-aft inclination of the arc bow or adjusting the left-right inclination of the carriage can change the path to the target.

[0003] The current frame-based stereotactic system has at least the following problems:

[0004] (1) When the puncture mechanism slides along the arc to the left and right sides for temporal puncture, the left earring or the right earring will block part of the puncture path, resulting in a large surgical blind area.

[0005] (2) The trapezoidal groove structure of the left and right male rings is the same, and they can be matched with the bases on both sides. It is easy for nurses to install them incorrectly when disassembling, cleaning and reinstalling them, and it is difficult to find, which may lead to the wrong setting of the target coordinate Z value.

[0006] (3) The existing scale is usually only set on the right mother plate. When the lesion is located in the left brain and the patient is in the right lateral decubitus position, the doctor must bend down or squat to read the scale, which is very likely to violate the principle of sterility and is very inconvenient. Or when the arc bow needs to be installed in reverse due to surgery, the surgical parameters obtained by the stereotactic surgery planning system must be converted into the readings when it is installed in reverse, which requires the doctor to do mental calculations and is prone to mistakes when the doctor lacks experience.

[0007] (4) During surgery, the sterile cloth laid out can easily get caught in the rod between the male and female rings, causing shearing and preventing the arc from rotating freely.

[0008] (5) To ensure accuracy, the clearance between the mother ring and the dial is very small, which makes it difficult to add lubricant and difficult to maintain. After cleaning, it is easy to rotate due to stiffness, which sometimes leads to "false" fixation. During operation, the arc bow may suddenly loosen, causing the puncture needle to form a surface cutting on the brain tissue. In severe cases, it may cause blood vessel rupture or even large-scale brain cutting injuries.

[0009] (6) The coupling between the male and female rings has only a concave and convex block that acts as a limit, and lacks a locking function. When the X-axis coordinate needs to be adjusted during surgery, the arc bow must be disassembled as a whole, which is inconvenient to operate. Utility Model Content

[0010] Based on the problems existing in the prior art, the utility model provides a frame-based stereotactic system.

[0011] The technical solutions adopted in this utility model are as follows:

[0012] A frame-based stereotactic system comprises a base ring assembly, an arc-shaped arch assembly, and an earring assembly that couples the two. The earring assembly comprises a male ring, a base, and a female ring, which couple to the base ring assembly and the arc-shaped arch assembly, respectively, to determine the three-dimensional coordinates of the target point within the frame. Both the male and female rings of the earring assembly can be divided into a ring portion and a stem portion. The male ring is composed of two groups of parts with similar "pq" symmetry; the rod of the male ring can move longitudinally along the trapezoidal groove on the base to change the Z coordinate of the target, and can also move back and forth as a whole along the trapezoidal groove of the base ring side frame to change the Y coordinate of the target; the two groups of female rings are both provided with a 0-360 degree dial, but the scale direction is opposite and with left and right markings; the inner and outer surfaces of the coupling parts of the male and female rings gradually reduce in diameter from the outside to the inside, and are trapezoidal along the radial cross-section to minimize surgical blind spots; the rod-shaped part of the male ring is provided with a limit groove, the bottom of the limit groove is closed, and the inner side surface of the base is provided with a limit screw or a one-way buckle extending into the groove to lock the male ring and the base into a whole that is not easy to disassemble; the inner side of the dial on the female ring has a protrusion, and when coupled with the male ring, the corresponding part forms a concave and convex buckle or uses a screw to lock the two.

[0013] Furthermore, the diameter of the dial gradually increases toward the skull side to be consistent with the diameter of the upper ring of the female ring, and the radial cross-section is trapezoidal, but the range does not exceed the outward extension line of the inner and outer surfaces of the male and female rings; the surface is provided with a first scale and left and right (LR) marks.

[0014] Furthermore, the outer surface of the ring portion of the mother ring is provided with a second scale, the first scale is in opposite directions to the second scale, and is also provided with left and right (LR) marks.

[0015] Furthermore, the first scale of the left mother ring is clockwise, and the second scale is counterclockwise; the first scale of the right mother ring is counterclockwise, and the second scale is clockwise.

[0016] Furthermore, the rod portion of the female ring is generally L-shaped, and its vertical short arm adjacent to the ring portion is stepped outward to connect with the horizontal long arm; when the arc bow is flipped to cause the short arm of the female ring rod portion to overlap with the male ring rod portion, a wide gap is left, and shearing is less likely to occur.

[0017] Furthermore, an oil line is provided on the coupling surface between the mother ring and the scale plate, and an oil filling hole is provided on the mother ring.

[0018] Furthermore, the scale plate and the male ring are provided with concave and convex blocks or buckles that can be locked with each other.

[0019] Compared with the prior art, the frame-based stereotactic system of the present invention has the following advantages:

[0020] The coupling between the male and female rings features a tapered diameter on the inner and outer surfaces facing the skull, with a trapezoidal radial cross-section to minimize surgical blind spots. A retaining structure on the back of the male ring's stem prevents removal of the male ring once inserted into the base, preventing misplacement during cleaning by nurses. Both female rings feature graduated dials. The first scale is on an inclined surface, making it easy to read whether the patient is in the left or right decubitus position postoperatively. A second scale is added to the outer circumference of the female ring. When the arch needs to be reversed during surgery, the scale reading can be read directly from the patient's left or right side, eliminating the need for conversion. A gap is left between the male and female rings to prevent drapes from becoming trapped during surgery and interfering with the arch's inclination. An oil line and oiling port are located on the coupling surface between the female ring and the dial, facilitating maintenance and reducing the risk of "false fixation" of the arch due to stiffness. The locking mechanism between the dial and the male ring allows the X-axis coordinate to be adjusted during surgery without removing the arc bow, saving surgical time. This new utility model addresses clinical pain points and improves the framed stereotactic system to cover more clinical application scenarios, making operation simpler, smoother, less prone to errors, and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall structural diagram of a framed stereotactic system;

[0022] Figure 2 This is the structure diagram of the earring kit;

[0023] Figure 3 This is the back structure diagram of the male ring;

[0024] Figure 4 This is the radial diagram after the male ring and the female ring are coupled;

[0025] Figure 5 This is a side view of the earring kit;

[0026] Figure 6 It is a schematic diagram of the oil line and oil filling hole;

[0027] Including: 1: base ring kit, 2: female ring, 2-1: left female ring, 2-2: right female ring, 3: male ring, 3-1: left male ring, 3-2: right male ring, 4: arc bow, 5: puncture mechanism, 6: base, 7: dial, 8: limit slot, 9: drag plate, 10: limit screw, 11: oil line, 12: oil filling hole. DETAILED DESCRIPTION

[0028] The present invention provides a frame-based stereotactic system comprising a base ring assembly 1, an arcuate arch assembly, and an earring assembly coupling the two. The arcuate arch assembly comprises an arcuate arch 4 and a carriage 9 attached to and sliding along the circumference of the arcuate arch 4. The carriage 9 is provided with a puncture mechanism 5 with a collimating function. The puncture target is the target point determined by the system. Adjusting the anterior-posterior tilt angle of the arcuate arch 4 or the lateral tilt angle of the carriage 9 can change the path to the target point.

[0029] The earring kit includes a base 6, a male ring 3 and a female ring 2. Both the male ring 3 and the female ring 2 include a ring portion and a rod portion. The ring portions of the male ring 3 and the female ring 2 are coupled to each other, the rod portion of the male ring 3 is coupled to the base ring kit 1 through the base 6, and the rod portion of the female ring 2 is coupled to the arc bow kit, thereby determining the three-dimensional coordinates of the target point within the frame.

[0030] Generally, a frame stereotactic system may be provided with two sets of mirror-symmetrical earring kits similar to "pq", such as Figure 1 As shown, the female ring 2 includes a left female ring 2-1 and a right female ring 2-2, which are slidably arranged on the left and right side frames of the base ring kit 1 through a base 6 respectively; the male ring 3 includes a left male ring 3-1 and a right male ring 3-2, which are respectively matched with the left male ring 3-1 and the right male ring 3-2 through the ring portion; the left female ring 2-1 and / or the right female ring 2-2 are provided with a scale plate 7; the left female ring 2-1 and the right female ring 2-2 are slidably arranged at both ends of the arc bow 4, and the line connecting the centers of the left male ring 3-1 and the right male ring 3-2 passes through the arc bow 4 Center of the circle; when in use, the Y-axis coordinate and the Z-axis coordinate of the target are determined by sliding the left public ring 3-1 and the right public ring 3-2 forward and backward and longitudinally relative to the base ring kit 1, and the X-axis coordinate of the target is determined by sliding the arc bow 4 left and right relative to the left public ring 3-1 and the right public ring 3-2; the rotation angle of the arc bow 4 along the line connecting the left public ring 3-1 and the right public ring 3-2 determines the pitch angle of the target, and the puncture mechanism 5 slides along the base ring kit 1 to determine the azimuth angle of the target. Finally, the target pointed to by the puncture mechanism 5 is the surgical incision position, and the orientation is completed.

[0031] Exemplarily, the rod of the male ring 3 is coupled to the base 6 through a trapezoidal groove, and the base 6 is coupled to the side frame of the base ring kit 1 through a trapezoidal groove. The rod of the male ring 3 moves longitudinally along the trapezoidal groove on the base 6 to change the Z coordinate of the target, and the overall movement of the base 6 back and forth in the trapezoidal groove of the side frame of the base ring kit 1 can change the Y coordinate of the target; the female ring 2 is coupled to the arc bow 4 through a trapezoidal groove, and the rod of the female ring 2 is placed in the trapezoidal groove of the arc bow 4 and serves as a guide rail for the arc bow 4, supporting its left and right translation to change the X coordinate of the target.

[0032] In the present utility model, Figure 2-4 As shown, the outer surface of the ring portion of the male ring 3 and the female ring 2 gradually decreases in diameter along the side facing the skull (i.e., the male ring), and the ring portion of the male ring 3 and the female ring 2 is trapezoidal in radial cross-section. When the puncture mechanism 5 slides along the base ring kit 1 to close to the earring kit, the obstruction of the puncture mechanism 5 by the left male ring 3-1 or the right male ring 3-2 can be effectively reduced, thereby reducing the blind spot of the operation; the slope of the gradually decreasing diameter is consistent with the slope of the line connecting the puncture mechanism 5 and the center of the arc bow 4.

[0033] like Figure 3 As shown, as a preferred embodiment, a vertical limit groove 8 is provided on the back of the rod of the male ring 3. The bottom of the limit groove 8 is closed, and the upper part is connected to the base 6 by a limit screw 10. A protrusion is also provided on the top of the rod of the male ring 3. The protrusion, the limit screw 10 and the limit groove 8 jointly limit the upward movement range of the male ring 3 along the trapezoidal groove on the base 6. The head end of the Y-axis locking screw on the base 6 slightly protrudes outward, limiting the downward movement range of the ring portion of the male ring 3 along the trapezoidal groove on the base 6. The male ring 3 can slide between the limit screw 10 and the protrusion, making it easier for medical staff to clean the male ring without separating from the base 6, thus preventing disassembly and misassembly.

[0034] like Figure 2 As shown, as a preferred embodiment, the diameter of the scale plate 7 gradually increases along the side facing the skull to be consistent with the diameter of the ring portion of the mother ring 2, and the radial cross-section of the scale plate 7 is trapezoidal; the surface is provided with a first scale, and the range of the first scale is 0-360 degrees, which is convenient for the doctor to read the scale when the patient is lying on his side. As another preferred embodiment, the outer peripheral surface of the ring portion of the mother ring 2 is also provided with a second scale, and the first scale is in opposite directions to the second scale. It is convenient for the doctor to read the scale when the arc bow is reversely installed, that is, when the left mother ring 2-1 and the right male ring 3-2, and the right mother ring 2-2 and the left male ring 3-1 cooperate with each other. At this time, if it is installed upright, read the first scale, and if it is installed reversely, read the second scale, without the need for conversion. Both the left and right mother rings are provided with scales, wherein the first scale of the left mother ring 2-1 is clockwise and marked with "L", and the second scale is counterclockwise and marked with "R"; the first scale of the right mother ring 2-2 is counterclockwise and marked with "R", and the second scale is clockwise and marked with "L". The doctor can directly read the scale values ​​on the left and right sides of the patient's body without conversion.

[0035] like Figure 5 As shown, as a preferred embodiment, the stem of the female ring 2 is L-shaped, wherein the short vertical arm adjacent to the ring portion is stepped outward to connect with the long horizontal arm. This ensures that when the female ring 2 is rotated to any position, the short vertical arm of the female ring stem will not shear with the stem of the male ring 3. This provides a gap at the connection between the female ring 2 and the male ring 3 to accommodate a sterile cloth, so that the sterile cloth will not hinder the rotation of the arc bow 4. In particular, the connection and locking point between the female ring 2 and the male ring 3 is arc-shaped.

[0036] like Figure 6 As shown, as a preferred embodiment, the male ring 3 and / or the female ring 2 are provided with an oil line 11 on the coupling surface. The oil line 11 is an annular groove. For example, it can be provided on the inner side of the female ring 2, the outer side of the male ring 3, or both. An oil filling hole 12 is provided on the female ring 2. When the dial 7 rotates unevenly or after being disassembled and cleaned by medical staff, lubricating oil can be injected through the oil filling hole 12 on the female ring 2. The lubricating oil immediately spreads along the oil line throughout the coupling surface of the female ring 2 and the male ring 3, thereby achieving a lubricating effect, facilitating the maintenance of the coupling surface of the female ring and the dial, and reducing the risk of "false fixation" arc bowing due to jerky fit.

[0037] As a preferred solution, a gap is provided at the coupling position of the male and female rings of the earrings, and the dial 7 and the male ring 3 are provided with matching concave and convex block buckles, and the dial and the male ring are locked by the concave and convex blocks. After locking, the female ring can rotate on the male ring but cannot be freely detached. The X-axis coordinate can be adjusted during the operation without removing the arc bow, which can save operation time.

[0038] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this utility model.

Claims

1. A frame-based stereotactic system, characterized in that: The system comprises a base ring kit, an arc-shaped bow kit and two sets of earring kits; the arc-shaped bow kit comprises an arc-shaped bow and a drag plate attached to the arc-shaped bow and sliding along the circumference of the arc-shaped bow, and the drag plate is provided with a puncture mechanism with a collimating function; the two sets of earring kits are located on both sides of the framed stereotactic system and are mirror-symmetrical; wherein each set of earring kits comprises a base, a male ring and a female ring, and the male ring and the female ring both comprise a ring portion and a rod portion; the ring portions of the male ring and the female ring are coupled to each other, and the rod portion of the male ring is coupled to the base ring kit through the base, The stem of the female ring is coupled to the arc-shaped bow kit; the female rings in both sets of earring kits are provided with a dial with a first scale, but the scale directions are opposite and there are left and right markings, and the range of the first scale is 0-360 degrees; the outer surfaces of the ring parts of the male and female rings gradually decrease in diameter along the side toward the midline of the skull, and the radial cross-section of the ring parts is trapezoidal; a limit groove is provided on the back of the stem part of the male ring, the bottom of the limit groove is closed, and a limit screw or a one-way buckle extending into the groove is provided on the inner side of the base to lock the male ring and the base together.

2. The frame-based stereotactic system according to claim 1, wherein: The diameter of the scale plate gradually increases along the side toward the skull to be consistent with the diameter of the ring portion of the mother ring, and the radial cross section of the scale plate is trapezoidal.

3. The frame-based stereotactic system according to claim 2, wherein: A second scale is provided on the outer peripheral surface of the female ring portion. The first scale is in opposite directions to the second scale and both have left and right markings.

4. The frame-based stereotactic system according to claim 3, wherein: The first scale on the left side of the framed stereotactic system is clockwise and marked with an "L", and the second scale is counterclockwise and marked with an "R"; the first scale on the right side of the framed stereotactic system is counterclockwise and marked with an "R", and the second scale is clockwise and marked with an "L".

5. The frame-based stereotactic system according to claim 1, wherein: The rod of the female ring is L-shaped, in which the vertical short arm adjacent to the ring is stepped outward to connect with the horizontal long arm, so that when the female ring is rotated to any position, the vertical short arm of the female ring rod will not shear with the rod of the male ring.

6. The frame-based stereotactic system according to claim 1, wherein: The coupling surfaces of the male ring and the female ring are provided with an oil line, and the female ring is provided with an oil filling hole.

7. The frame-based stereotactic system according to claim 1, wherein: The coupling parts of the male and female rings of the earrings are provided with matching concave and convex block buckles.

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