Vertebral pedicle opener capable of measuring sclerotin

Abstract

The invention belongs to the technical field of medical apparatus and instruments, and relates to a vertebral pedicle opener capable of measuring sclerotin, which comprises an opener body (1), the opener body (1) comprises a core rod (101), the rear end of the core rod (101) is connected with a handle inner core (115) through a linear bearing (113), and the handle inner core (115) is connected with the linear bearing (113). A tail end cover (107) is installed at the rear end of the handle inner core (115), a pressure sensor (114) is arranged between the rear end face of the core rod (101) and the front end face of the tail end cover (107), the outer side of the core rod (101) is sleeved with an outer sleeve (102), a film displacement sensor (109) is pasted in a cavity of the outer sleeve (102), and a pressure glass bead (108) is arranged on the core rod (101). And a head pressure ball of the pressure glass bead (108) is in contact with the thin film displacement sensor (109) so as to provide signal triggering pressure for the thin film displacement sensor (109). The bone condition of a pedicle screw path of a patient can be provided for a doctor in an operation, so that the doctor can judge the use amount of bone cement after the pedicle screw is implanted according to the bone condition.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments and relates to a pedicle opener, in particular to a pedicle opener capable of measuring bone quality. Background Art

[0002] Spinal fixation is the most common surgery in the treatment of spinal surgical diseases. Pedicle screw fixation is required during the operation, and bone cement needs to be injected after screw implantation to improve mechanical stability for patients with osteoporosis.

[0003] With the serious trend of population aging at home and abroad, more and more patients suffer from degenerative spinal diseases with osteoporosis, and the use of pedicle screws combined with bone cement will become more and more common. However, due to the individual differences in the bone quality of clinical patients, the number of trabeculae, pore structure, cortical bone thickness, etc. in the osteoporotic vertebrae of different patients are different, and this will affect the therapeutic effect of bone cement injection. Less bone cement injection will not obtain sufficient biomechanical stability, and more injection will lead to wider diffusion and increase the risk of leakage. At the same time, bone cement causes abnormal increase in the local strength of the pedicle, which will cause stress shielding effect, and then induce local stress concentration in the pedicle, and finally induce pedicle fracture.

[0004] At present, the research on the amount of bone cement used in the spine is mostly focused on vertebroplasty, and is mostly focused on the bone cement leakage and endplate fracture that may be caused by excessive bone cement injection. No in-depth research has been conducted on the individual differences in patients' bone quality and the amount of bone cement used. At the same time, there is currently no portable bone detection device available for surgical operations on the market, and the amount of bone cement used for different patients during surgery is mainly based on the doctor's clinical experience, the injection feel in actual operation, and the observation of CT images after injection.

[0005] Therefore, in view of the defects existing in the above-mentioned prior art, it is necessary to develop a new type of pedicle opener that can measure bone quality. Summary of the invention

[0006] In order to overcome the defects of the prior art, the present invention proposes a pedicle opener that can measure bone quality. The pedicle opener can measure the work done by external force when the pedicle screw channel is established, and provide the doctor with the bone condition of the patient's pedicle screw channel during the operation, so that the doctor can judge the amount of bone cement after pedicle screw implantation according to the bone condition.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A pedicle opener capable of measuring bone quality comprises an opener body, characterized in that the opener body comprises a core rod, the rear end of the core rod is connected to a handle inner core via a linear bearing, a tail end cover is installed at the rear end of the handle inner core, a pressure sensor is arranged between the rear end face of the core rod and the front end face of the tail end cover, an outer sleeve is sleeved on the outer side of the core rod and a thin film displacement sensor is pasted in the cavity of the outer sleeve, a pressure glass bead is arranged on the core rod, and a pressure ball at the head of the pressure glass bead contacts the thin film displacement sensor to provide a signal trigger pressure to the thin film displacement sensor.

[0009] Preferably, the pedicle opener capable of measuring bone quality further comprises a main controller, and the displacement sensor data line of the thin film displacement sensor and the pressure sensor data line of the pressure sensor are both connected to the main controller, so that the main controller can read the displacement data of the thin film displacement sensor and the pressure data of the pressure sensor.

[0010] Preferably, the pedicle opener capable of measuring bone quality further comprises a host computer, and the main controller sends the displacement data and pressure data to the host computer through a serial port. The host computer calculates the integral area of ​​the pressure-displacement curve based on the displacement data and pressure data, and obtains the work done by the external force when the pedicle screw track is established, thereby judging the patient's bone condition.

[0011] Preferably, a first spring is sleeved on the front end of the core rod, and the first spring pushes between the core rod and the outer sleeve to make the core rod and the outer sleeve return to zero position when not in use.

[0012] Preferably, a second spring is sleeved on the rear end of the core rod, and the second spring pushes between the core rod and the linear bearing, so that the rear end surface of the core rod and the pressure sensor are in a non-contact state when not in use.

[0013] Preferably, the circuit breaker body further comprises a first wire clamp, which is connected to the outer sleeve via a buckle and is used to fix the tail terminal board of the thin film displacement sensor.

[0014] Preferably, the opener body further comprises a second wire clamp, which is fixedly connected to the core rod via a positioning pin and is used to fix the displacement sensor data line of the thin film displacement sensor to prevent the displacement sensor data line from swinging randomly.

[0015] Preferably, a data line fixing clamp is provided in the second line clamp for clamping the data line of the displacement sensor to prevent it from moving freely.

[0016] Preferably, a spherical handle is sleeved on the outer side of the inner core of the handle for palm holding, and a wire opening is provided on the spherical handle for leading out the displacement sensor data line and the pressure sensor data line.

[0017] Preferably, a puncture scale indicator mark is provided on the outer sleeve.

[0018] Compared with the prior art, the pedicle opener capable of measuring bone quality of the present invention has one or more of the following beneficial technical effects:

[0019] 1. The pedicle opener of the present invention is designed with a puncture displacement measuring structure and a puncture pressure measuring structure, which can measure and collect the puncture displacement and puncture pressure in real time during the operation.

[0020] 2. The present invention can collect the pressure-displacement curve during the pedicle screw puncture process during the operation, and calculate the integral area of ​​the pressure-displacement curve to obtain the work done in the process, thereby judging the patient's bone condition.

[0021] 3. The present invention can effectively improve the quality of spinal surgery, solve the current problem of judging the amount of bone cement used during surgery by experience, and realize scientific and quantitative judgment of the amount of bone cement used during surgery based on individual differences. It has reliable practical value and is conducive to effective, rapid and safe surgery.

[0022] 4. The pedicle opener of the present invention can set a displacement warning value, and the nail track length value can be set in combination with CT image evaluation before surgery. When the puncture reaches the specified depth during surgery, the instrument can prompt an alarm, thereby ensuring the accuracy of the puncture nail track.

[0023] 5. The head of the pedicle opener of the present invention can provide a variety of opening styles such as curved-wide, curved-narrow, and straight, which can meet various clinical needs of doctors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric view of the pedicle opener capable of measuring bone quality of the present invention;

[0025] Figure 2 It is an axonometric view of the opener body of the pedicle opener capable of measuring bone quality of the present invention;

[0026] Figure 3 It is a cross-sectional view of the opener body of the pedicle opener capable of measuring bone quality of the present invention;

[0027] Figure 4 yes Figure 3 An enlarged view of a portion of the structure to more clearly illustrate its internal structure;

[0028] Figure 5 yes Figure 3An enlarged view of another part of the device is provided to more clearly show its internal structure. DETAILED DESCRIPTION

[0029] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0030] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0031] Due to individual differences in bone quality, different bones consume different amounts of energy when forming the same pedicle screw channel. Conversely, this phenomenon can be used to determine individual bone quality differences by measuring the work done during the process of establishing the pedicle screw channel. The present invention uses this principle to provide doctors with the bone quality conditions of the patient's pedicle screw channel during surgery by measuring the work done by external forces during the establishment of the pedicle screw channel, so that doctors can determine the amount of bone cement after pedicle screw implantation based on the bone quality conditions, which can effectively improve the quality of spinal surgery, solve the current problem of determining the amount of bone cement during surgery by experience, and achieve scientific and quantitative determination of the amount of bone cement during surgery based on individual differences. It has reliable practical value and is conducive to effective, rapid and safe surgery.

[0032] Figure 1 An axonometric view of a pedicle opener capable of measuring bone quality according to the present invention is shown. Figure 1As shown, the pedicle opener capable of measuring bone quality of the present invention comprises an opener body 1. The opener body 1 is used to establish a pedicle screw channel, and the opener body 1 can measure the displacement and pressure when the pedicle screw channel is established, so as to facilitate the calculation of the work done by the external force when the pedicle screw channel is established, and further provide the doctor with the bone quality condition of the patient's pedicle screw channel during the operation, so that the doctor can judge the amount of bone cement after the pedicle screw is implanted according to the bone quality condition.

[0033] like Figure 2-Figure 5 As shown, the circuit opener body 1 comprises a core rod 101. The core rod 101 is used to puncture the pedicle when the pedicle screw track is established.

[0034] In the present invention, the head of the core rod 101 can provide a variety of opening styles such as curved-wide, curved-narrow, and straight, so as to meet various clinical needs of doctors.

[0035] The rear end of the core rod 101 is connected to the handle inner core 115 via a linear bearing 113 , so that the core rod 101 can slide axially along the linear bearing 113 .

[0036] The rear end of the handle inner core 115 is installed with a tail end cap 107, and a pressure sensor 114 is provided between the rear end face of the core rod 101 and the front end face of the tail end cap 107. The tail end cap 107 is used to compress the pressure sensor 114. The pressure sensor 114 is used to measure the pressure value when the core rod 101 punctures the pedicle.

[0037] Preferably, the rear end of the core rod 101 is sleeved with a second spring 112. The two ends of the second spring 112 push against the core rod 101 and the linear bearing 113 respectively, so that the rear end surface of the core rod 101 and the pressure sensor 14 are in a non-contact state when not in use.

[0038] The outer side of the core rod 101 is sleeved with an outer sleeve 102, and a thin film displacement sensor 109 is pasted in the cavity of the outer sleeve 102. The thin film displacement sensor 109 is used to measure the relative sliding displacement between the core rod 101 and the outer sleeve 102 when the core rod 101 punctures the pedicle.

[0039] Preferably, the front end of the core rod 101 is sleeved with a first spring 110. The two ends of the first spring 110 push against the core rod 101 and the outer sleeve 102 respectively, so that the core rod 101 and the outer sleeve 102 return to zero position when not in use.

[0040] The core rod 101 is provided with a pressure glass bead 108. The pressure ball at the head of the pressure glass bead 108 contacts the film displacement sensor 109, thereby providing a signal triggering pressure to the film displacement sensor 109.

[0041] Preferably, the pressure glass bead 108 is installed on the core rod 101 through threads, so that the pressure glass bead 108 can be better fixed on the core rod 101.

[0042] Continue to refer Figure 1 The pedicle opener capable of measuring bone quality of the present invention further comprises a main controller 2. The main controller may be an STM32 single chip microcomputer.

[0043] The displacement sensor data line 111 of the thin film displacement sensor 109 and the pressure sensor data line 117 of the pressure sensor 114 are both connected to the main controller 2 , so that the main controller 2 can read the displacement data of the thin film displacement sensor 109 and the pressure data of the pressure sensor 114 .

[0044] In addition, although not shown in the accompanying drawings, the pedicle opener capable of measuring bone quality of the present invention further includes a host computer. The main controller 2 can send the displacement data and pressure data to the host computer through a serial port. Thus, the host computer can fuse the displacement data and pressure data to form a pressure displacement curve and calculate the integral area of ​​the pressure displacement curve, so as to obtain the work done by the external force when the pedicle screw track is established, and then judge the patient's bone quality.

[0045] Among them, the displacement data and pressure data are integrated to form a pressure-displacement curve and the integral area of ​​the pressure-displacement curve is calculated, and the work done by the external force is obtained based on the integral area. This belongs to the prior art and will not be described in detail here for the sake of simplicity.

[0046] In this way, the pedicle opener of the present invention is designed with a puncture displacement measuring structure and a puncture pressure measuring structure, which can measure and collect the puncture displacement and puncture pressure in real time during the operation. Moreover, the pressure-displacement curve during the puncture of the pedicle screw channel can be collected during the operation, and the integral area of ​​the pressure-displacement curve can be calculated to obtain the work done in the process, thereby judging the patient's bone condition. Therefore, the present invention can effectively improve the quality of spinal surgery, solve the problem of judging the amount of bone cement by experience during the operation, and realize the scientific and quantitative judgment of the amount of bone cement used during the operation according to individual differences, which has reliable practical value and is conducive to the effective, rapid and safe operation.

[0047] In the present invention, preferably, the circuit breaker body 1 further comprises a first wire clamp 104. The first wire clamp 104 is connected to the outer sleeve 102 via a buckle 119, and is used to fix the tail terminal board of the film displacement sensor 109.

[0048] More preferably, a fixing clamp is provided in the first wire clamp 104 for clamping the displacement sensor data wire 111 to prevent it from moving freely.

[0049] In addition, preferably, the circuit breaker body 1 further comprises a second wire clamp 105. The second wire clamp 105 is fixedly connected to the core rod 101 via a positioning pin 116, and is used to fix the displacement sensor data line 111 of the film displacement sensor 109 to prevent the displacement sensor data line 111 from swinging randomly.

[0050] More preferably, the displacement sensor data line 111 is spirally received in the second wire clamp 105 , so that when the core rod 101 and the outer sleeve 102 slide relatively, the displacement sensor data line 111 can be extended and received along the axial direction of the core rod 101 .

[0051] More preferably, the second wire clamp 105 is provided with a data wire fixing clamp 118 for clamping the displacement sensor data wire 111 to prevent it from moving freely.

[0052] In addition, an annular texture is designed on the outer surface of the second wire clamp 105 for the index finger to press and exert force during puncture.

[0053] In the present invention, a ball handle 106 is sleeved on the outer side of the handle inner core 115 for palm gripping. In addition, a wire opening is provided on the ball handle 106 for leading out the displacement sensor data line 111 and the pressure sensor data line 117 so as to be connected to the main controller 2.

[0054] Finally, preferably, a puncture scale indicator 103 is provided on the outer sleeve 102. The puncture scale indicator 103 can display the puncture depth so as to grasp the puncture situation.

[0055] Moreover, before the operation, the pedicle screw track length value can be set in combination with CT image evaluation, and the displacement warning value can be set according to the screw track length value. When the puncture reaches the specified depth during the operation (obtained by the thin film displacement sensor 109), the host computer can prompt an alarm, thereby achieving precise puncture.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Those skilled in the art can modify or replace the technical solution of the present invention according to the idea of ​​the present invention without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A pedicle opener capable of measuring bone quality, comprising an opener body (1), characterized in that: The circuit breaker body (1) comprises a core rod (101), the rear end of the core rod (101) is connected to a handle inner core (115) via a linear bearing (113), the rear end of the handle inner core (115) is installed with a tail end cover (107), and a pressure sensor (114) is arranged between the rear end face of the core rod (101) and the front end face of the tail end cover (107), the outer side of the core rod (101) is sleeved with an outer sleeve (102), and a thin film displacement sensor (109) is pasted in the cavity of the outer sleeve (102), and a pressure glass bead (108) is arranged on the core rod (101), and the pressure ball at the head of the pressure glass bead (108) contacts the thin film displacement sensor (109) to provide a signal trigger pressure to the thin film displacement sensor (109).

2. The pedicle opener capable of measuring bone quality according to claim 1, characterized in that: The invention further comprises a main controller (2), wherein a displacement sensor data line (111) of the thin film displacement sensor (109) and a pressure sensor data line (117) of the pressure sensor (114) are both connected to the main controller (2), so that the main controller (2) can read the displacement data of the thin film displacement sensor (109) and the pressure data of the pressure sensor (114).

3. The pedicle opener capable of measuring bone quality according to claim 2, characterized in that: The invention further comprises a host computer, the main controller (2) sends the displacement data and pressure data to the host computer via a serial port, and the host computer calculates the integral area of ​​the pressure-displacement curve based on the displacement data and pressure data, and obtains the work done by the external force when the pedicle screw track is established, thereby judging the patient's bone condition.

4. The pedicle opener capable of measuring bone quality according to any one of claims 1 to 3, characterized in that: A first spring (110) is sleeved on the front end of the core rod (101), and the first spring (110) pushes between the core rod (101) and the outer sleeve (102), so that the core rod (101) and the outer sleeve (102) return to zero position when not in use.

5. The pedicle opener capable of measuring bone quality according to claim 4, characterized in that: The rear end of the core rod (101) is sleeved with a second spring (112), and the second spring (112) pushes between the core rod (101) and the linear bearing (113), so that the rear end surface of the core rod (101) and the pressure sensor (14) are in a non-contact state when not in use.

6. The pedicle opener capable of measuring bone quality according to claim 5, characterized in that: The circuit breaker body (1) further comprises a first wire clamp (104), which is connected to the outer sleeve (102) via a buckle (119) and is used to fix the tail terminal board of the thin film displacement sensor (109).

7. The pedicle screw opener capable of measuring bone quality according to claim 6, characterized in that: The circuit breaker body (1) further comprises a second wire clamp (105), which is fixedly connected to the core rod (101) via a positioning pin (116) and is used to fix the displacement sensor data line (111) of the thin film displacement sensor (109) to prevent the displacement sensor data line (111) from swinging randomly.

8. The pedicle screw opener capable of measuring bone quality according to claim 7, characterized in that: The second wire clamp (105) is provided with a data wire fixing clamp (118) for clamping the displacement sensor data wire (111) to prevent it from moving freely.

9. The pedicle screw opener capable of measuring bone quality according to claim 8, characterized in that: The outer side of the handle inner core (115) is provided with a spherical handle (106) for being held by the palm of the hand, and the spherical handle (106) is provided with a wire opening for leading out the displacement sensor data line (111) and the pressure sensor data line (117).

10. The pedicle screw opener capable of measuring bone quality according to claim 9, characterized in that: The outer sleeve (102) is provided with a puncture scale indicator (103).

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