CN210990668U

CN210990668U - Pedicle screw

Info

Publication number: CN210990668U
Application number: CN201920972026.0U
Authority: CN
Inventors: 赵宇; 邱贵兴; 胡桓宇; 王丽; 刘梁
Original assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-07-14
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a pedicle screw, this pedicle screw includes: the screw body is of a hollow structure; a detection section for detecting a biological feature of a human tissue; a controller for identifying a type of the human tissue according to the biometric feature; wherein the detection part is connected with the controller and is arranged in the screw main body. The pedicle screw utilizes the detection part to detect the biological characteristics of human tissues according to the different biological characteristics of different human tissues; then, identifying the type of human tissue according to the biological characteristics through the controller; the process that the pedicle screw is implanted into the human tissue can be monitored in real time, and further, the human tissue information can be fed back to a doctor in real time through the controller, so that the doctor is assisted to perform operation safely and conveniently.

Description

Pedicle screw

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a pedicle of vertebral arch screw.

Background

At present, pedicle screw fixation is one of common operations in spinal surgery, and the screw feeding technology is the key for successful operation. As the spinal cord and the nerves are distributed in the human tissue, once the pedicle screws are drilled into the spinal cord or the nerves in the process of implanting the pedicle screws, paralysis or dysfunction of the patient is easily caused, and even the life is threatened.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to a certain extent.

Therefore, an object of the utility model is to provide a pedicle screw can its process of implanting human tissue of real-time supervision to can feed back the human tissue information at its head place to the doctor in real time, and then supplementary doctor safety, conveniently carry out the operation work.

In order to achieve the above object, an embodiment of the present invention provides a pedicle screw, including:

the screw body is of a hollow structure;

a detection section for detecting a biological feature of a human tissue;

a controller for identifying a type of the human tissue according to the biometric feature;

wherein the detection part is connected with the controller and is arranged in the screw main body.

According to the utility model discloses an embodiment, the head end of screw main part is provided with spacing portion, the tail end of screw main part is provided with detachable lock nut, wherein, spacing portion is used for the restriction the detection portion orientation the head end of screw main part removes.

According to the utility model discloses an embodiment, spacing portion is the ring form.

According to an embodiment of the present invention, the locking nut is screwed to the tail end of the screw body.

According to an embodiment of the present invention, the detection portion includes an impedance detection component and a hardness detection component, and the impedance detection component and the hardness detection component are sequentially arranged in the screw main body from the head end to the tail end of the screw main body;

wherein the impedance detection component is used for detecting the impedance of human tissue; the hardness detection assembly is used for detecting the hardness of human tissues.

According to an embodiment of the present invention, the hardness detecting unit is a load cell.

According to an embodiment of the present invention, the load cell is a strain gauge load cell or a thin film pressure sensor.

According to the utility model discloses an embodiment still includes the display module, the display module with the controller links to each other, wherein, the display module is used for showing human tissue's type.

According to an embodiment of the present invention, the display assembly comprises a flash and/or a buzzer.

According to the utility model discloses an embodiment, be provided with the passageway that is used for placing the cable in the screw main part.

The pedicle screw provided by the embodiment of the utility model utilizes the detection part to detect the biological characteristics of human tissues according to the biological characteristics of different human tissues; then, the type of the human tissue is identified by the controller according to the biological characteristics. The embodiment of the utility model provides an in pedicle of vertebral arch screw, the process that human tissue was implanted to the pedicle of vertebral arch screw of real-time supervision, furtherly, can give the doctor with human tissue information real-time feedback through the controller, and then supplementary doctor safety, conveniently carry out the operation work.

Drawings

Fig. 1 is a schematic structural view of a pedicle screw according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the pedicle screw of FIG. 1;

fig. 3 is a schematic structural view of a hardness detection part in a pedicle screw according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a hardness detection part in a pedicle screw according to another embodiment of the present disclosure;

FIG. 5 is a schematic view of a pedicle screw of an embodiment of the present disclosure entering human tissue;

fig. 6 is a schematic structural view of a pedicle screw according to another embodiment of the present disclosure;

FIG. 7 is a schematic flow chart diagram of a method for pedicle screw detection of human tissue types in accordance with an embodiment of the present disclosure.

In the figure:

1-pedicle screws; 11-a screw body; 12-a limiting part; 13-a locking nut; 2-a detection section; 21-an impedance detection component; 22-a hardness detection component; 221-elastic metal block; 222-a resistive strain gage; 223-thin film pressure sensor; 224-metal block; 3-a controller; 4-cancellous bone; 5-cortical bone; 6-soft tissue; 7-a display component; 71-a light module; 72-a sound module; 8-power supply module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Pedicle screws according to embodiments of the invention are described below with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural view of a pedicle screw according to an embodiment of the present disclosure; fig. 2 is an exploded view of the pedicle screw of fig. 1. As shown in fig. 1 and 2, the present embodiment provides a pedicle screw, comprising: screw body 11, detection portion and controller 3. The screw main body 11 is a hollow structure; a detection section for detecting a biological feature of a human tissue; and the controller 3 is used for identifying the type of the human tissue according to the biological characteristics. Wherein the detection part is connected with the controller 3 and arranged in the screw body 11. It should be understood that the controller in this embodiment may be, but is not limited to being, a programmable logic controller.

Optionally, in order to limit the movement of the detection portion, a limiting portion 12 is disposed at the head end of the screw body 11, and a detachable locking nut 13 is disposed at the tail end of the screw body 11. The position-limiting part 12 may be fixedly connected to the screw main body 11, for example, both may be integrally designed. In addition, the limiting part 12 may be annular, and the center of the circle is the axis of the screw main body 11; specifically, it may extend toward the axial center of the screw body 11 by a certain distance from the inner wall of the head end of the screw body 11, which may be determined according to the actual situation, and is not limited herein. The locking nut 13 may be threadedly coupled to the rear end of the screw body 11.

Optionally, the detection portion includes an impedance detection component 21 and a hardness detection component 22, wherein the impedance detection component 21 and the hardness detection component 22 are arranged in the screw main body 11 from the head end to the tail end of the screw main body 11 in sequence.

The impedance detection component 21 is used for detecting the impedance of human tissue, and may be an impedance electrode. In particular, the force transmission electrode block can be connected with the controller 3 through a cable. In the process of detecting the impedance of the human tissue, the controller 3 may send a trigger signal to the impedance detecting assembly 21 in real time or according to a preset frequency to trigger the impedance detecting assembly 21 to detect the impedance of the human tissue. It should be understood that the trigger signal is used to trigger the impedance detection assembly 21 to detect the impedance of the human tissue.

Alternatively, the trigger signal may be a 5k-30k sine wave signal at a preset voltage. The preset voltage may be, but is not limited to, a low voltage, such as 12V, 24V, etc.

A hardness detection assembly 22 for detecting the hardness of human tissue, which may be a load cell. Specifically, it may be a strain gauge load cell or a diaphragm pressure sensor, and it may also be connected to the controller 3 through a cable. It should be understood that the controller 3 may also send a trigger signal to the hardness detecting assembly 22 in real time or according to a preset frequency to trigger the hardness detecting assembly 22 to detect the hardness of the human tissue; in addition, the controller 3 may not generate the trigger signal to the hardness detection component 22, but the hardness detection component 22 may directly detect the hardness of the human tissue, and specifically, the hardness detection component may be determined according to actual situations, and is not limited herein.

When the hardness detecting assembly 22 is a strain gauge load cell, as shown in fig. 3, it includes an elastic metal block 221 and a resistance strain gauge 222; the resistive strain gauge 222 is disposed inside the elastic metal block 221. In the detection process, under the influence of the resistance of the human tissue, when the impedance detection assembly 21 contacts the human tissue, the impedance detection assembly 21 will press the elastic metal block 221 under the action of the resistance, so that the elastic metal block 221 is deformed. Under the influence of the deformation of the elastic metal block 221, the resistive strain gauge 222 will be pressed, so that the resistance of the resistive strain gauge 222 changes. Further, the controller 3 acquires the resistance value change condition of the resistance strain gauge 222, and then acquires the stress condition of the head of the pedicle screw.

When the hardness detecting member 22 is a diaphragm type pressure sensor, as shown in fig. 4, it includes a sensor body 223 and a metal block 224; wherein the sensor body 223 is located intermediate the impedance detecting assembly 21 and the metal block 224. It should be understood that, in consideration of the small size of the sensor body 223 and the long length of the screw main body 11, in the present embodiment, the metal block 224 is used as a filler for the convenience of assembly. In the detection process, under the influence of the resistance of the human tissue, when the impedance detection component 21 contacts the human tissue, the impedance detection component 21 will press the sensor body 223, so that the resistance value of the sensor body 223 changes. Further, the controller 3 acquires the resistance value change condition of the sensor body 223, and then can acquire the stress condition of the head of the pedicle screw. It should be understood that, by acquiring the stress condition of the head of the pedicle screw, the mapping relation chart between the stress of the pedicle screw and the hardness of the human tissue can be inquired to determine the hardness of the human tissue.

It should be noted that, in the present embodiment, the screw main body 11, and/or the hardness detection assembly 22, and/or the lock nut 13 may be provided with a channel for placing a cable, considering that the impedance detection assembly 21 and the hardness detection assembly 22 are connected to the controller 3 through a cable.

Alternatively, since different tissues in the human tissue have different biometrics characteristics, when the controller 3 acquires the biometrics characteristics detected by the detection section, the type of the human tissue can be identified based on the biometrics characteristics. It should be understood that the biological characteristics in this embodiment include impedance and stiffness of human tissue, for example, cortical bone in human tissue, with impedance ranging from 10-20 and stiffness ranging from 5-10; if the impedance and the stiffness acquired by the controller 3 are 12 and 6, respectively, the human tissue can be determined to be cortical bone.

Optionally, if the human tissue is identified as soft tissue according to at least one of impedance and hardness, determining that the type of the human tissue is soft tissue;

if the human tissue is identified to be non-soft tissue according to the impedance and the hardness, and at least one identified human tissue is cortical bone, determining the type of the human tissue to be cortical bone;

if the human tissue is identified as cancellous bone according to both the impedance and the hardness, it is determined that the type of the human tissue is cancellous bone.

Further, in order to facilitate the doctor to know the condition of the human tissue in time, the pedicle screw in the embodiment may further include a display component, and the controller 3 may control the display component to display the type of the human tissue; the controller 3 and the display module may be connected by wire or wirelessly. Wherein, the display component can be a flash lamp and/or a buzzer. For example, the controller 3 may control the flash lamp to emit light corresponding to the type of the human tissue, e.g., the flash lamp may flash three times to determine that the type of the human tissue is cancellous bone.

Further, the controller 3 may also send the impedance and/or stiffness to the terminal device for recording the detection result or facilitating other physician's review. The controller 3 and the terminal device may be connected by wire or wirelessly.

It should be understood that the controller 3 of the present embodiment may be removably attached to the pedicle screw body 1, such as by adhesive; the material can be separately arranged at other places, and the material can be determined according to actual conditions, and is not limited herein.

Fig. 5 is a schematic view of a pedicle screw entering human tissue according to an embodiment of the present disclosure. As shown in fig. 5, the pedicle screw 1 is currently actually in the cancellous bone 4, and the detected resistance and hardness thereof can be identified as being within the range of the resistance and hardness of the cancellous bone 4. As the pedicle screw 1 continues to move into the body tissue, it will detect the resistance and hardness of the cortical bone 4, as well as the resistance and hardness of the soft tissue 5.

Fig. 6 is a schematic structural view of a pedicle screw according to another embodiment of the present disclosure. As shown in fig. 6, the pedicle screw includes a screw body 11, a detection part 2, a controller 3, a display assembly 7 and a power module 8. Wherein, the detection part 2 is used for detecting the biological characteristics of human tissues; the controller 3 is used for identifying the type of human tissue according to the biological characteristics; the power module 8 is used for providing power for the detection part 2, the controller 3 and the display component 7; the display assembly 7 includes a light module 71 and/or a sound module 72 for displaying the type of human tissue. The light module 71 may be a flash, and the sound module 72 may be a buzzer.

It should be noted that, in the pedicle screw provided in this embodiment, after the pedicle screw is implanted into a human tissue, the detachable nut 13 at the tail end of the pedicle screw may be removed, and the detection portion in the screw body 11 may be removed; further, the screw body 11 is left in the human tissue.

In summary, the pedicle screw provided in this embodiment utilizes the detection unit to detect impedance information and hardness information of human tissue according to different impedances and hardnesses of different human tissues; then, the type of the human tissue is identified by the controller according to the impedance information and the hardness information. The utility model discloses pedicle screw can real-time supervision pedicle screw implant human tissue's process, and further, can feed back human tissue information to the doctor in real time through the controller, and then supplementary doctor safety, conveniently carry out the operation work.

Example two

FIG. 7 is a schematic flow chart diagram of a method for pedicle screw detection of human tissue types in accordance with an embodiment of the present disclosure. The pedicle screw detection method for detecting the type of human tissue is to detect by using the pedicle screw of one embodiment, and particularly, as shown in fig. 7, the method comprises the following steps:

and S71, acquiring the biological characteristics of the human tissue.

Specifically, when the pedicle screw enters the body tissue, it will acquire the impedance and stiffness of the body tissue. The details can be found in the above description, and are not repeated herein.

And S72, identifying the type of the human tissue according to the biological characteristics.

Specifically, since different tissues in the human tissue have different biometrics characteristics, when the controller 3 acquires the biometrics characteristics detected by the detection section, the type of the human tissue can be identified from the biometrics characteristics. It should be understood that the biological characteristics in this embodiment include impedance and stiffness of human tissue, for example, cortical bone in human tissue, with impedance ranging from 10-20 and stiffness ranging from 5-10; if the impedance and the stiffness acquired by the controller 3 are 12 and 6, respectively, the human tissue can be determined to be cortical bone.

Optionally, the obtaining of the biological characteristics of the human tissue comprises:

and sending a trigger signal to the detection part, and determining the biological characteristics according to the received feedback signal of the detection part, wherein the trigger signal is used for triggering the detection part to detect the biological characteristics of the human tissue. The trigger signal is a 5k-30k sine wave signal under a preset voltage.

Optionally, the biological characteristics include impedance and stiffness of human tissue;

identifying the type of human tissue according to the biological characteristics, comprising:

determining the type of the human tissue as a soft tissue if the human tissue is identified as the soft tissue according to at least one of the impedance and the hardness;

Optionally, identifying the type of human tissue based on the biometric features includes:

and sending the biological characteristics to the terminal equipment.

Optionally, after identifying the type of the human tissue according to the biometric features, the method includes:

the control display component displays the type of human tissue.

It should be understood that the above method is used to execute the apparatus in the above embodiments, and the implementation principle and technical effect of the method are similar to those described in the above apparatus, and the implementation process of the method may refer to the corresponding process in the above apparatus, and will not be described herein again.

In summary, in the method for detecting the type of the human tissue by using the pedicle screw according to the first embodiment, the type of the human tissue is identified by using the acquired impedance information and hardness information of the human tissue according to different impedances and hardnesses of different human tissues. The process that the pedicle screw is implanted into the human tissue can be monitored in real time, and further, the information of the human tissue can be fed back to a doctor in real time, so that the doctor is assisted to perform operation safely and conveniently. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A pedicle screw, comprising:

the screw body is of a hollow structure;

a detection section for detecting a biological feature of a human tissue;

2. The pedicle screw according to claim 1, wherein the head end of the screw body is provided with a limiting portion, and the tail end of the screw body is provided with a detachable locking nut, wherein the limiting portion is used for limiting the detection portion to move towards the head end of the screw body.

3. The pedicle screw according to claim 2, wherein the stop portion is annular.

4. The pedicle screw according to claim 2, wherein the locking nut is threadedly connected to the tail end of the screw body.

5. The pedicle screw according to any one of claims 1-4, wherein the detection portion comprises an impedance detection component and a hardness detection component, the impedance detection component and the hardness detection component being arranged in the screw body in sequence from a head end to a tail end of the screw body;

6. The pedicle screw according to claim 5, wherein the hardness detection assembly is a load cell.

7. The pedicle screw according to claim 6, wherein the load cell is a strain cell or a thin film pressure sensor.

8. The pedicle screw according to any one of claims 1-4, further comprising a display assembly connected to the controller, wherein the display assembly is adapted to display the type of human tissue.

9. Pedicle screw according to claim 8, wherein the display assembly comprises a flashing light and/or a buzzer.

10. Pedicle screw according to any of claims 1-4, wherein a channel for the placement of a cable is provided in the screw body.