CN111658167A - Integrated pedicle screw path detection device - Google Patents
Integrated pedicle screw path detection device Download PDFInfo
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- CN111658167A CN111658167A CN202010650837.6A CN202010650837A CN111658167A CN 111658167 A CN111658167 A CN 111658167A CN 202010650837 A CN202010650837 A CN 202010650837A CN 111658167 A CN111658167 A CN 111658167A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B2034/2068—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis using pointers, e.g. pointers having reference marks for determining coordinates of body points
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
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Abstract
The invention provides an integrated pedicle screw path detection device, which comprises: the nerve root probe is provided with a through hole; a breakable K-wire insertable into the through-hole and breakable through the nerve root probe. According to the invention, before the pedicle screw is implanted, the position of the screw channel can be marked through the Kirschner wire during fluoroscopy, so that the subsequent pedicle screw can be conveniently placed into the screw channel.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an integrated pedicle screw path detection device.
Background
The human being is used as a vertebrate, the function and significance of the spine on the human body are very important, the spine of a normal human body is positioned in the middle of the back, the upper end of the spine is connected with a skull, the lower end of the spine reaches the tip of a coccyx, the spine is a middle shaft skeleton of the human body, is a support of the body, and has the functions of loading, shock absorption, protection, movement and the like. In addition, the spine protects the internal spinal cord, which is the central pivot for many simple reflexes, and thus, it can be said that the spine is one of the most important skeletal structures of the human body.
It is known in spinal surgery to implant pedicle screws into vertebral bodies for the purpose of stabilizing and/or reinforcing the vertebral bodies in order to treat spinal disorders, for example, caused by tumors, aging processes, genetic causes, trauma or degenerative diseases. Ideally, the pedicle screws are positioned such that the screws are completely received in the pedicle of the articular process of the vertebral body. The screws should not protrude from the root and in particular should not extend into the area of the spinal foramen or spinal cord. Incorrect positioning can lead to instability of the treated vertebral body and in the worst case to nerve damage and thus, for example, to severe paralysis. The positioning of the pedicle screws is therefore important.
At present, in a pedicle screw implantation operation, a detection device for marking the position of a screw channel in the process of fluoroscopy in the operation is not used before the pedicle screw is implanted, so that the pedicle screw is inconvenient to be placed in the screw channel.
Disclosure of Invention
The invention provides an integrated pedicle screw path detection device, which is used for solving the technical problem.
Integration pedicle of vertebral arch nail way detection device includes:
the nerve root probe is provided with a through hole;
a breakable K-wire insertable into the through-hole and breakable through the nerve root probe.
Preferably, the tail end of the nerve root probe is provided with a ball head.
Preferably, the pedicle screw is provided with a hollow channel for sleeving the breakable kirschner wire.
Preferably, the diameter of the through hole is 1.7mm, the diameter of the breakable needle is 1.5mm, and the inner diameter of the hollow channel of the pedicle screw is 1.7 mm.
Preferably, the through hole penetrates through two ends of the nerve root probe in the length direction;
the length of the nerve root probe is 18 cm;
the length of the breakable kirschner wire is 23cm, and the broken section length of the breakable kirschner wire is 10 cm.
Preferably, the length of the pedicle screw is any one of 40, 45, 50, 55, 60, 65, 70, 75 and 80mm, and the diameter of the threaded part of the pedicle screw is any one of 5mm, 6mm, 7mm, 8mm and 9 mm;
the thread pitch of the thread section of the pedicle screw is 3 mm.
Preferably, the pedicle screw comprises:
the screw comprises a screw body and a U-shaped cap connected to the head of the screw body;
the lower end of the U-shaped cap is fixedly connected with a first column body;
the screw body includes:
a threaded segment;
the spherical convex block is fixedly connected with the head end of the threaded section;
a locking member;
the locking piece and the spherical convex block are positioned in the hollow connecting block, and a limiting clamping groove matched with the shape of the lower end of the spherical convex block is arranged in the hollow connecting block;
the retaining member includes:
a second cylinder;
one end of the connecting body is fixedly connected with one end of the second cylinder, a hemispherical groove is formed in the other end of the connecting body, the hemispherical groove is matched with the upper end of the spherical bump, and the other end of the second cylinder is connected with one end, far away from the U-shaped cap, of the first cylinder;
one end of the third column body is fixedly connected to the middle part in the hemispherical groove, and one end, close to the locking part, of the spherical convex block is provided with a slot for inserting the other end of the third column body;
the side wall of the hollow connecting block and the side wall of the first column body are connected through threads or fixed through screws.
Preferably, the pedicle screw comprises:
the screw comprises a screw body and a U-shaped cap connected to the head of the screw body;
the U-shaped cap is connected with a spine fixing rod connecting assembly;
the spinal fixation rod connection assembly includes:
the inner side wall of the U-shaped cap is provided with a thread groove;
the cross-shaped clamping groove is arranged on the inner bottom wall of the U-shaped cap;
the cross-shaped fixture block is fixedly connected to the lower end of the spine fixing rod and matched with the cross-shaped clamping groove;
the locking bolt is matched with the thread groove;
the pressing block is provided with a groove matched with the shape of the side face of the spine fixing rod and used for pressing the outer wall of the spine fixing rod, and the pressing block is positioned below the locking bolt;
the locking bolt and the side wall of the U-shaped cap are correspondingly provided with threaded holes, and the threaded holes can be connected with locking screws.
Preferably, the device further comprises a perspective device, the perspective device is connected to the control host through a signal conditioning circuit, and the signal conditioning circuit includes:
the device comprises an amplifying unit, a biasing unit, a voltage conditioning unit and a reference unit;
the voltage conditioning unit includes:
the emitter of the second triode is connected with the signal output end of the perspective equipment;
the negative electrode of the third diode is connected with the collector electrode of the second triode;
the cathode of the first diode is connected with the anode of the third diode;
the anode of the second diode is connected with the anode of the first diode;
the first end of the fourth resistor is connected with the base electrode of the second triode;
the first end of the seventh resistor is connected with the second end of the fourth resistor and the base electrode of the second triode;
the collector of the first triode is grounded, and the emitter of the first triode is connected with the second end of the seventh resistor;
an emitter of the fifth triode is connected with the emitter of the first triode and the second end of the seventh resistor, a collector of the fifth triode is connected with a fourth power supply, and a base of the fifth triode is connected with the base of the first triode;
one end of the tenth resistor is connected with the anode of the second diode, and the other end of the tenth resistor is connected with the anode of the third diode;
one end of the capacitor is connected with the anode of the second diode, and the other end of the capacitor is connected with the anode of the third triode;
the reference unit includes:
one end of the second resistor is connected with a third power supply, the other end of the second resistor is connected with a first end of a fifth resistor, and a second end of the fifth resistor is connected with a base electrode of the first triode and grounded through a sixth resistor;
the bias unit includes:
a base electrode of the fourth triode is connected with the second end of the fifth resistor, and a collector electrode of the fourth triode is grounded;
the positive input end of the first operational amplifier is connected with the base electrode of the fourth triode;
a base electrode of the third triode is connected with an emitting electrode of the fourth triode, and a collector electrode of the third triode is connected with the first power supply;
one end of the first current stabilizing source is connected with the emitting electrode of the fourth triode and the base electrode of the third triode, and the other end of the first current stabilizing source is connected with the second power supply;
one end of the second current stabilizing source is connected with the emitter of the third triode and the negative input end of the first operational amplifier through the first resistor, and the other end of the second current stabilizing source is grounded;
one end of the third resistor is connected with the negative input end of the first operational amplifier, and the other end of the third resistor is connected with the output end of the first operational amplifier;
the amplification unit includes:
the negative input end of the second operational amplifier is connected with the output end of the first operational amplifier through an eighth resistor, the positive input end of the second operational amplifier is connected with the emitter of the second triode, and the output end of the second operational amplifier is connected with the control host;
and one end of the ninth resistor is connected with the negative input end of the second operational amplifier, and the other end of the ninth resistor is connected with the output end of the second operational amplifier.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a nerve root probe after the connection with a breakable kirschner wire is completed.
Fig. 2 is a schematic structural diagram of the nerve root probe in fig. 1.
Fig. 3 is a schematic structural view of the breakable k-wire of fig. 1.
FIG. 4 is a schematic view illustrating the connection state between the nerve root probe and the breakable K-wire.
FIG. 5 is an external structural view of an embodiment of a pedicle screw.
Fig. 6 is a cross-sectional view of the pedicle screw of fig. 5.
FIG. 7 is a schematic view of the nerve root probe attached to a vertebral body.
FIG. 8 is a schematic structural view of another embodiment of a pedicle screw;
fig. 9 is a schematic view of the locking member of fig. 8.
FIG. 10 is a circuit diagram of a signal conditioning circuit according to the present invention.
In the figure: 1. a nerve root probe; 11. a ball head; 12. a through hole; 13. the tail end of the nerve root probe; 14. a nerve root probe tip; 2. the kirschner wire can be broken; 21. the part can be broken; 22. a breaking section; 3. a vertebral body; 4. a spinous process; 5. transverse process; 6. the spinal canal; 7. pedicle screws; 71. a threaded segment; 72. a hollow channel; 73. a U-shaped cap; 731. a thread groove; 732. a cross-shaped clamping groove; 733. a cross-shaped fixture block; 734. locking the bolt; 735. briquetting; 74. a screw body; 741. a spherical bump; 742. a hollow connecting block; 7421. a limiting clamping groove; 743. a locking member; 7431. a second cylinder; 7432. a linker; 7433. a third column; 7434. a hemispherical recess; 75. a first column; 8. a spinal fixation rod; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; c1, capacitance; u1, a first operational amplifier; u2, a second operational amplifier; u3, a first constant current source; u4, a second constant current source; q1, the first triode; q2, the second triode; q3, third triode; q4, fourth triode; q5, the fifth triode; v1, a first power supply; v2, second power supply; v3, third power supply; v4, fourth power supply; d1, a first diode; d2, a second diode; d3, a third diode.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The embodiment of the invention provides an integrated pedicle screw path detection device, which comprises the following components in parts by weight as shown in figures 1-7:
the nerve root probe 1 is provided with a through hole 12;
a breakable kirschner wire 2 insertable into said through hole 12 and breakable by said nerve root probe 1.
Preferably, the ball head 11 is arranged at the tail end 13 of the nerve root probe, so that the broken part of the breakable kirschner wire can be broken conveniently.
Preferably, the length of the breakable needle is greater than that of the nerve root probe, so that after the breakable kirschner needle is inserted into the through hole of the nerve root probe, the broken section of the breakable kirschner needle penetrates out of the tail end of the nerve root probe, the broken section of the breakable kirschner needle is kept in the vertebral body after the breakable kirschner needle is broken, and other parts can be taken out of the vertebral body along with the nerve root probe.
FIG. 7 is a schematic view of a nerve root probe inserted into a vertebral body, wherein: the vertebrae include: the vertebral body 3, the spinous process 4, the transverse process 5 and the vertebral canal 6, and the vertebral structure is the prior art and is not described again;
the working principle and the beneficial effects of the technical scheme are as follows:
during operation, after a nail channel is preliminarily manufactured, a nerve root probe is inserted into the nail channel (as shown in fig. 7), a breakable kirschner wire is inserted into the through hole 12 from the head end 14 of the nerve root probe, then the head end of the nerve root probe is lifted until the tail end 13 of the nerve root probe is positioned at the breakable part 21 of the breakable kirschner wire, the breakable kirschner wire is broken along the breakable part 21 through the tail end 13 of the nerve root probe, the broken part of the breakable kirschner wire is left in a wound for marking the position of the nail channel during fluoroscopy, and other parts of the breakable kirschner wire are taken out of a vertebral body along with the nerve root probe.
According to the technical scheme, the position of the nail path can be marked through the Kirschner wire during perspective before the pedicle screw is implanted, so that the nail path can be conveniently placed into the follow-up pedicle screw.
In one embodiment, as shown in FIG. 6, the pedicle screw 7 is provided with a hollow channel 72 for sleeving the breakable K-wire 2.
The working principle and the beneficial effects of the technical scheme are as follows: the pedicle screw can be sleeved along the broken section 22 of the kirschner wire of the broken section, so that the phenomenon of diversion caused by the absence of guidance of the kirschner wire in the screw placing process is avoided, and particularly the situation of osteoporosis is avoided.
In one embodiment, the through hole has a diameter of 1.7mm, the breakable needle has a diameter of 1.5mm, and the pedicle screw 7 has a hollow channel with an inner diameter of 1.7 mm.
The working principle and the beneficial effects of the technical scheme are as follows: the size is convenient for the breakable kirschner wire to be inserted into the through hole, the pedicle screw to be sleeved into the breakable kirschner wire and the breakable kirschner wire to be left in the vertebral body nail path.
In one embodiment, the through hole penetrates through both ends of the nerve root probe in the length direction;
the length of the nerve root probe 1 is 18 cm;
the length of the breakable kirschner wire 2 is 23cm, and the length of the breakable kirschner wire 2 is 10 cm.
The working principle and the beneficial effects of the technical scheme are as follows: after the breakable kirschner wire is conveniently inserted into the through hole of the nerve root probe, the broken section of the breakable section kirschner wire penetrates out of the tail end of the nerve root probe, the broken section of the breakable section kirschner wire is conveniently remained in the vertebral body after the breakable section kirschner wire is broken, and other parts can be taken out of the vertebral body along with the nerve root probe; and the proper broken section length is convenient for subsequent perspective and guiding the pedicle screw into the screw channel,
In one embodiment, the pedicle screw 7 has a length of any one of 40, 45, 50, 55, 60, 65, 70, 75, 80mm, and the threaded portion of the pedicle has a diameter of any one of 5mm, 6mm, 7mm, 8mm, 9 mm;
the thread pitch of the thread section 71 of the pedicle screw 7 is 3 mm.
The working principle and the beneficial effects of the technical scheme are as follows: the pedicle screw with proper size is arranged, so that the pedicle screw can play a role in fixing in the vertebral body.
In one embodiment, as shown in figures 8-9,
the pedicle screw 7 includes:
a screw body 74 and a U-shaped cap 73 attached to the head of the screw body 74;
the lower end of the U-shaped cap 73 is fixedly connected with a first column 75;
the screw body 74 includes:
a threaded segment 71;
the spherical bump 741 is fixedly connected with the head end of the threaded section 71;
a locking member 743; preferably, the locking piece is made of elastic wear-resistant rubber;
the locking member 743 and the spherical projection 741 are both located in the hollow connecting block 742, and a limiting clamping groove 7421 matched with the shape of the lower end of the spherical projection 741 is arranged in the hollow connecting block 742;
the locking member 743 includes:
a second post 7431;
one end of a connecting body 7432 is fixedly connected with one end of the second column 7431, the other end of the connecting body 7432 is provided with a hemispherical groove 7434, the hemispherical groove is matched with the upper end of the spherical bump 741, and the other end of the second column 7431 is connected with one end of the first column far away from the U-shaped cap 73;
one end of the third column 7433 is fixedly connected to the middle part of the hemispherical groove, and a slot for inserting the other end of the third column 7433 is formed at one end of the spherical projection 741 close to the locking member 743;
the side wall of the hollow connection block 742 and the side wall of the first column are connected by screw threads or fixed by screws.
The working principle and the beneficial effects of the technical scheme are as follows:
the spherical convex block is arranged for adjusting the angle of the threaded section, after the adjustment is finished, the first column body is screwed, and pressure is transmitted to the locking part through the first column body to realize locking of the spherical convex block; the locking structure is simple and convenient to lock;
the limiting clamping groove is used for limiting the spherical convex block, the reliability of the connecting structure is guaranteed, and the third cylinder and the slot are arranged to guarantee that the positioning is reliable.
In one embodiment, as shown in figures 8-9,
the pedicle screw 7 includes:
a screw body 74 and a U-shaped cap 73 attached to the head of the screw body 74;
the U-shaped cap 73 is connected with a connecting component of a spine fixing rod 8;
the 8 coupling assembling of spinal fixation stick includes:
the inner side wall of the U-shaped cap 73 is provided with a thread groove 731;
a cross-shaped slot 732 arranged on the inner bottom wall of the U-shaped cap 73;
the cross-shaped fixture block 733 is fixedly connected to the lower end of the spine fixing rod, and the cross-shaped fixture block 733 is matched with the cross-shaped clamping groove 732;
a lock bolt 734 matching the screw groove 731;
the pressing block 735 is provided with a groove matched with the shape of the side face of the spine fixing rod 8 and used for pressing the outer wall of the spine fixing rod 8, and the pressing block 735 is positioned below the locking bolt 734;
the locking bolt 734 and the side wall of the U-shaped cap 73 are correspondingly provided with threaded holes, and a locking screw can be connected in the threaded holes.
The working principle and the beneficial effects of the technical scheme are as follows: when the spine fixing rod (traction rod) is installed, the spine fixing rod is placed on the U-shaped cap, a cross-shaped clamping block of the spine fixing rod is positioned with a cross-shaped clamping groove in the inner wall of the U-shaped cap, then a pressing block is placed at the upper end of the spine fixing rod, a groove of the pressing block 735 is pressed on the outer wall of the spine fixing rod 8, then a locking bolt is connected into the threaded groove, and the locking bolt is rotated to press the pressing block, so that the spine fixing rod is fixed;
the cross-shaped fixture block and the cross-shaped clamping groove on the inner wall of the U-shaped cap are positioned to place the spinal fixation rod to rotate, and the arrangement of the pressing block, the groove of the pressing block and the locking bolt is convenient for reliably pressing the spinal fixation rod;
the locking bolt 734 and the side wall of the U-shaped cap 73 are correspondingly provided with threaded holes, and a locking screw can be connected in the threaded hole for further fixing the locking bolt, so that the locking bolt is prevented from being loosened due to abrasion.
In one embodiment, the apparatus further comprises a perspective device connected to the control host through a signal conditioning circuit, the signal conditioning circuit comprising:
the device comprises an amplifying unit, a biasing unit, a voltage conditioning unit and a reference unit;
as shown in fig. 9, the voltage conditioning unit includes:
the emitter of the second triode Q2 is connected with the signal output end of the perspective device;
the negative electrode of the third diode D3 is connected with the collector electrode of the second triode Q2;
the cathode of the first diode D1 is connected with the anode of the third diode D3;
the anode of the second diode D2 is connected with the anode of the first diode D1;
a first end of the fourth resistor R4 is connected with the base electrode of the second triode Q2;
a seventh resistor R7, a first end of which is connected to the second end of the fourth resistor R4 and the base of the second triode Q2;
the collector of the first triode Q1 is grounded, and the emitter of the first triode Q1 is connected with the second end of the seventh resistor R7;
an emitter of the fifth triode Q5 is connected with an emitter of the first triode Q1 and the second end of the seventh resistor R7, a collector of the fifth triode Q5 is connected with a fourth power supply V4, and a base of the fifth triode Q5 is connected with a base of the first triode Q1;
a tenth resistor R10, having one end connected to the anode of the second diode D2 and the other end connected to the anode of the third diode D3;
one end of the capacitor C1 is connected with the anode of the second diode D2, and the other end of the capacitor C1 is connected with the anode of the third triode Q3;
the reference unit includes:
a second resistor R2, one end of which is connected to a third power source V3, the other end of which is connected to a first end of a fifth resistor R5, a second end of the fifth resistor R5 is connected to the base of the first triode Q1 and the ground via a sixth resistor R6;
the bias unit includes:
a base of the fourth triode Q4 is connected with the second end of the fifth resistor R5, and a collector of the fourth triode Q4 is grounded;
a positive input end of the first operational amplifier U1 is connected with a base electrode of a fourth triode Q4;
a base electrode of the third triode Q3 is connected with an emitting electrode of the fourth triode Q4, and a collector electrode of the third triode Q3 is connected with a first power supply V1;
one end of the first current stabilizing source U3 is connected with an emitting electrode of a fourth triode Q4 and a base electrode of a third triode Q3, and the other end of the first current stabilizing source U3 is connected with a second power supply V2;
one end of a second current stabilizing source U4 is connected with an emitter of a third triode Q3 and the negative input end of a first operational amplifier U1 through a first resistor R1, and the other end of the second current stabilizing source U4 is grounded;
a third resistor R3, one end of which is connected with the negative input end of the first operational amplifier U1, and the other end of which is connected with the output end of the first operational amplifier U1;
the amplification unit includes:
a negative input end of the second operational amplifier U2 is connected to an output end of the first operational amplifier U1 through an eighth resistor R8, a positive input end of the second operational amplifier U2 is connected to an emitter of a second triode Q2, and an output end of the second operational amplifier U2 is connected to the control host;
and one end of the ninth resistor R9 is connected with the negative input end of the second operational amplifier U2, and the other end is connected with the output end of the second operational amplifier U2.
D1 and D3 are transient voltage suppression diodes.
The working principle and the beneficial effects of the technical scheme are as follows: the signal is amplified through the U2 in the amplifying unit, the voltage is guaranteed to be constant through the voltage conditioning unit, the deviation is prevented, the overvoltage protection effect is achieved, a first voltage reference is generated through the reference unit and is provided for the voltage conditioning unit, a second voltage reference is generated and is provided for the biasing unit, the voltage is biased through the biasing unit and then is fed back to the voltage conditioning unit, and the interference is removed through the biasing unit; the Q3 and the Q4 prevent the voltage input to the U1 from shifting, and the influence of the V3 on the voltage reference input to the U1 can be reduced; dynamic voltage suppression is realized through D1, static voltage suppression is realized through D1, D3 and C, R10, and R4 is used for current-limiting protection D1 and D3.
In summary, the application ensures reliable transmission of signals, thereby ensuring reliable perspective detection of the kirschner wire.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. Integration pedicle of vertebral arch nail way detection device, its characterized in that includes:
the nerve root probe (1) is provided with a through hole (12);
a breakable kirschner wire (2) insertable into the through hole (12) and breakable by the nerve root probe (1).
2. The integrated pedicle screw path detection device according to claim 1, wherein a ball head (11) is arranged at the tail end of the nerve root probe (1).
3. The integrated pedicle screw path detection device according to claim 1, wherein the pedicle screw (7) is provided with a hollow channel (72) for sleeving the breakable k-wire (2).
4. The integrated pedicle screw path detection device according to claim 3,
the diameter of the through hole (12) is 1.7mm, the diameter of the breakable needle is 1.5mm, and the inner diameter of the hollow channel (72) of the pedicle screw (7) is 1.7 mm.
5. The integrated pedicle screw path detection device according to claim 1,
the through holes (12) penetrate through two ends of the nerve root probe (1) in the length direction;
the length of the nerve root probe (1) is 18 cm;
the length of the breakable kirschner wire (2) is 23cm, and the length of the broken section (22) of the breakable kirschner wire (2) is 10 cm.
6. The integrated pedicle screw path detection device according to claim 1,
the length of the pedicle screw (7) is any one of 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm and 80mm, and the diameter of the threaded part of the pedicle screw is any one of 5mm, 6mm, 7mm, 8mm and 9 mm;
the thread pitch of the thread section (71) of the pedicle screw (7) is 3 mm.
7. The integrated pedicle screw path detection device according to claim 1,
the pedicle screw (7) comprises:
a screw body (74) and a U-shaped cap (73) connected to the head of the screw body (74);
the lower end of the U-shaped cap (73) is fixedly connected with a first column (75);
the screw body (74) includes:
a threaded segment (71);
the spherical bump (741) is fixedly connected with the head end of the threaded section (71);
a locking member (743);
the locking piece (743) and the spherical convex block (741) are located in the hollow connecting block (742), and a limiting clamping groove (7421) matched with the shape of the lower end of the spherical convex block (741) is arranged in the hollow connecting block (742);
the locking member (743) includes:
a second column (7431);
one end of the connecting body (7432) is fixedly connected with one end of the second column body (7431), the other end of the connecting body (7432) is provided with a hemispherical groove (7434), the hemispherical groove (7434) is matched with the upper end of the spherical bump (741), and the other end of the second column body (7431) is connected with one end, far away from the U-shaped cap (73), of the first column body (75);
a third column (7433), one end of which is fixedly connected to the middle part in the hemispherical groove (7434), and one end of the spherical convex block (741) close to the locking piece (743) is provided with a slot for inserting the other end of the third column (7433);
the side wall of the hollow connecting block (742) and the side wall of the first column (75) are connected through threads or fixed through screws.
8. The integrated pedicle screw path detection device according to claim 1,
the pedicle screw (7) comprises:
a screw body (74) and a U-shaped cap (73) connected to the head of the screw body (74);
the U-shaped cap (73) is connected with a connecting component of a spine fixing rod (8);
the spinal fixation rod (8) connection assembly comprises:
the inner side wall of the U-shaped cap (73) is provided with a thread groove (731);
the cross-shaped clamping groove (732) is arranged on the inner bottom wall of the U-shaped cap (73);
the cross-shaped fixture block (733) is fixedly connected to the lower end of the spine fixing rod (8), and the cross-shaped fixture block (733) is matched with the cross-shaped clamping groove (732);
a lock bolt (734) matching the threaded groove (731);
the pressing block (735) is provided with a groove matched with the shape of the side face of the spine fixing rod (8) and used for pressing the outer wall of the spine fixing rod (8), and the pressing block (735) is located below the locking bolt (734);
and threaded holes are correspondingly formed in the locking bolts (734) and the side wall of the U-shaped cap (73), and locking screws can be connected in the threaded holes.
9. The integrated pedicle screw path detection device according to claim 1,
still include perspective equipment, perspective equipment passes through signal conditioning circuit connection control host computer, signal conditioning circuit includes:
the device comprises an amplifying unit, a biasing unit, a voltage conditioning unit and a reference unit;
the voltage conditioning unit includes:
a second triode (Q2), wherein an emitter is connected with the signal output end of the perspective device;
a third diode (D3), the negative pole of which is connected with the collector of the second triode (Q2);
a first diode (D1) with a cathode connected to the anode of the third diode (D3);
a second diode (D2) with the anode connected with the anode of the first diode (D1);
a fourth resistor (R4), the first end of which is connected with the base of the second triode (Q2);
a seventh resistor (R7), the first end of which is connected with the second end of the fourth resistor (R4) and the base of the second triode (Q2);
the collector of the first triode (Q1) is grounded, and the emitter of the first triode is connected with the second end of the seventh resistor (R7);
the emitter of the fifth triode (Q5) is connected with the emitter of the first triode (Q1) and the second end of the seventh resistor (R7), the collector of the fifth triode (Q5) is connected with the fourth power supply (V4), and the base of the fifth triode (Q5) is connected with the base of the first triode (Q1);
a tenth resistor (R10) having one end connected to the anode of the second diode (D2) and the other end connected to the anode of the third diode (D3);
one end of the capacitor (C1) is connected with the anode of the second diode (D2), and the other end of the capacitor (C1) is connected with the anode of the third triode (Q3);
the reference unit includes:
the second resistor (R2), one end connects the third power (V3), another end connects the first end of the fifth resistor (R5), the second end of the said fifth resistor (R5) connects the base of the first triode (Q1) and grounds through the sixth resistor (R6);
the bias unit includes:
the base of the fourth triode (Q4) is connected with the second end of the fifth resistor (R5), and the collector of the fourth triode is grounded;
a first operational amplifier (U1), the positive input end of which is connected with the base of a fourth triode (Q4);
a base electrode of the third triode (Q3) is connected with an emitting electrode of the fourth triode (Q4), and a collector electrode of the third triode (Q3) is connected with the first power supply (V1);
a first current stabilizing source (U3), one end of which is connected with the emitter of the fourth triode (Q4) and the base of the third triode (Q3), and the other end of which is connected with a second power supply (V2);
a second current stabilizing source (U4), one end of which is connected with the emitter of the third triode (Q3) and the negative input end of the first operational amplifier (U1) through a first resistor (R1), and the other end of which is grounded;
a third resistor (R3), one end of which is connected with the negative input end of the first operational amplifier (U1), and the other end of which is connected with the output end of the first operational amplifier (U1);
the amplification unit includes:
a negative input end of the second operational amplifier (U2) is connected with an output end of the first operational amplifier (U1) through an eighth resistor (R8), a positive input end of the second operational amplifier (U2) is connected with an emitter of a second triode (Q2), and an output end of the second operational amplifier (U2) is connected with the control host;
and a ninth resistor (R9), one end of which is connected with the negative input end of the second operational amplifier (U2), and the other end of which is connected with the output end of the second operational amplifier (U2).
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| CN111658167B (en) | 2021-08-10 |
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