CN216652394U

CN216652394U - Open circuit system with safety nail-placing drill bit in spinal column orthopedic operation

Info

Publication number: CN216652394U
Application number: CN202120281522.9U
Authority: CN
Inventors: 汪飞; 唐凯; 林刚
Original assignee: Nanjing Childrens Hospital of Nanjing Medical University
Current assignee: Nanjing Childrens Hospital of Nanjing Medical University
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2022-06-03
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to an open circuit system provided with a safe nail placing drill bit in spinal orthopedic surgery, wherein the safe nail placing drill bit and the open circuit system comprise a straight drill bit, a bendable drill bit and an open circuit device. Wherein the straight drill comprises a blunt thread area, a scale area and a fixed area; the bendable drill comprises a blunt thread area, a bendable area, a traveling area, a scale area and a fixing area; the open circuit device comprises an open circuit area, a thread area, a scale area and a fixing area. The device can realize the safe preparation of the pedicle screw channel in the spinal orthopedic operation, improve the accuracy of screw placement, reduce the risk of screw placement and ensure the safety of the sick children in the operation process. The utility model has the advantages of ingenious design, convenient use and wide application prospect.

Description

Open circuit system provided with safe nail placing drill bit in spinal orthopedic surgery

Technical Field

The utility model relates to a safe screw placing drill bit and an open circuit system, in particular to an auxiliary tool system for preparing a pedicle screw channel in spinal orthopedic surgery, and belongs to the technical field of medical instruments.

Background

Scoliosis (Scoliosis) is a common disease of the skeletal system. According to the standards of the international Scoliosis Research Society (SRS), the Scoliosis angle reaches the standard of operation when the angle is more than 45-50 degrees. At present, the most common surgical type of spinal orthopedic surgery is posterior orthopedic internal fixation, and the most commonly used fixing device is a pedicle screw and orthopedic rod system. The pedicle screw fixing technology is gradually developed and applied from 1980 s to the present, and the currently used screw placing technology mainly comprises free-hand screw placing and power system (electric drill) screw placing. The hand-operated nail placing tool is simple, but the local vibration amplitude of a patient is large during operation, and the risk is further increased for the patient with the nerve injury risk. In addition, when the nail is placed by hands, a doctor needs to use large upper limb strength, fatigue is easily caused during long-section operation, and the problem of upper limb health of the doctor is caused due to long-term accumulation. The power system has small action amplitude, labor saving and clear feedback when the power system is used for placing the nail, not only can ensure the local body position stability of a patient, but also is beneficial to reducing the fatigue of an operating doctor and improving the overall safety of the operation. However, the dynamic system screw has a certain risk of nerve and blood vessel damage, and particularly the risk of patients with poor pedicle development is further increased. Therefore, the technology has high requirements on the operation capability of doctors, and only a small number of doctors can be skilled at present. The reason for analyzing the instrument has a certain relationship with the currently used instrument. At present, the conventional orthopedic drill bit is still used for the screw placement of the power system, and a drill bit system specially designed for the screw placement operation of the vertebral pedicle is not provided. Therefore, a new solution to solve the above technical problems is urgently needed.

Disclosure of Invention

The utility model provides a safe screw placing drill bit and an open circuit system for preparing a pedicle screw channel in spinal orthopedic surgery aiming at the technical problems in the prior art. The scheme can realize effective and safe nail path preparation for patients with pedicle dysplasia. By using the system, the nail placing risk of the power system can be reduced, and the operation safety is improved.

In order to achieve the purpose, the technical scheme of the utility model is that the open circuit system provided with the safe nail placing drill bit in the spinal orthopedic surgery comprises the nail placing drill bit and the open circuit device. When in use, the nail placing drill bit and the circuit opener are sequentially matched with the orthopedic power electric drill for operation.

As an improvement of the utility model, the screw placing drill comprises a straight drill and a bendable drill, and is selected to be used according to the development condition of the vertebral pedicle of the patient during operation.

As a modification of the utility model, the straight drill bit main body has a diameter of 2.0mm-2.5mm, preferably 2.0mm, and comprises a blunt thread area, a scale area and a fixed area from the top to the bottom. The length of the threaded area is 20mm, the top of the threaded area is a blunt end, and the time for the drill bit to drill through cortical bone can be prolonged. The length of the scale area is 30mm, the surface of the scale area is provided with electroplated annular scale marks, the interval between the scale marks in the front 10mm area and the back 10mm area is 1mm, and the interval between the scale marks in the middle 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom is triangular prism, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

As a modification of the utility model, the bendable drill main body has a diameter of 2.5mm-3.5mm, preferably 3.0mm, and comprises a thread region, a bendable region, a moving region, a scale region and a fixing region from top to bottom. The length of the threaded area is 10mm, the diameter is 2.5mm, the top of the threaded area is a blunt head, and the blunt head is more round and blunt than the tip of a straight drill bit, so that the time for drilling through cortical bone can be prolonged. The bendable region is 10mm in length and 1.5mm in diameter. The transition zone was 5mm in length and gradually thickened from 1.5mm to 3.0mm in diameter. The length of the scale area is 30mm, the surface of the scale area is provided with electroplated annular scale marks, the interval between the scale marks in the front 10mm area and the back 10mm area is 1mm, and the interval between the scale marks in the middle 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom is triangular prism, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

As a modification of the utility model, the diameter of the main body of the circuit breaker is 3.0mm-4.0mm, preferably 3.5mm, and the circuit breaker comprises a circuit breaking area, a thread area, a scale area and a fixing area from top to bottom. The open circuit area is 10mm in length, is in a flat column shape, and the top of the open circuit area is a blunt end. The cross section of the open circuit area is rectangular, the length is 2.0mm, and the width is 1.0 mm. The threaded zone is 10mm in length and 3.5mm in diameter. The length of the scale area is 40mm, the surface of the scale area is provided with electroplated annular scale marks, the interval between the scale marks in the first 10mm area and the third 10mm area is 1mm, and the interval between the scale marks in the second 10mm area and the fourth 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom of the fixing area is triangular prism-shaped, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

Compared with the prior art, the utility model has the following advantages: 1) the tips of the straight drill and the bendable drill in the technical scheme are more round and blunt than the tips of the traditional drill, and the drill has obvious feedback when touching the four walls of the pedicle of vertebral arch and the front edge of the vertebral body during nail placement, so that direct drilling is not easy to cause wall breaking, and the iatrogenic risk of neurovascular injury is reduced; 2) when the bendable drill bit is used for developing thinner pedicle screw placement, if the drill bit touches the pedicle wall halfway by mistake in direction, the automatic lane change can be realized, a path which can be continuously deepened is searched, and the screw placement accuracy is improved; 3) after the channel is drilled through the drill bit, the nail placing channel can be further expanded by using the circuit breaker in the technical scheme. Because the top of the device is blunt and the front section has no thread, the bone cortex can not be drilled continuously after the device touches the bottom of the nail placing channel, and the risk of iatrogenic neurovascular injury can be reduced. By using the safe nail placing and opening device system, the iatrogenic neurovascular injury risk can be reduced, the nail placing operation threshold of the power system is reduced, the overall safety of the operation is improved, and the system is also helpful for guaranteeing the occupational health of doctors. The whole system is ingenious in design and convenient to use, overcomes the defects of the existing device, and has wide application prospects.

Drawings

FIGS. 1a-d are schematic views of a straight drill bit provided by the present invention;

FIGS. 2a-d are schematic views of a bendable drill bit according to the present invention;

FIGS. 3a-e are schematic diagrams of the circuit breaker provided by the present invention;

FIGS. 4a-e are schematic diagrams of the method of using the straight drill bit with the circuit breaker according to the present invention;

FIGS. 5a-h are schematic diagrams of a bendable drill bit incorporating the use of a circuit breaker according to the present invention;

in the figure:

1. a straight drill bit; 1.1, a threaded zone; 1.2, a scale area; 1.3, fixed area.

2. A bendable drill bit; 2.1, a threaded zone; 2.2, a bendable region; 2.3, a transition area; 2.4, a scale area; 2.5, fixing area. 3. Opening a road device; 3.1, an open circuit area; 3.2, a threaded area; 3.3, a scale area; 3.4, a fixed area;

the specific implementation mode is as follows:

for the purpose of promoting an understanding of the present invention, reference will now be made in detail to the present embodiments of the utility model, examples of which are illustrated in the accompanying drawings.

Example 1: referring to fig. 1-5, a safe screw placement drill and a system for preparing pedicle screw passageways for spinal orthopedic surgery includes a screw placement drill and a distractor 3. When in use, the nail placing drill bit and the circuit opener are sequentially matched with the orthopedic power electric drill for operation.

In the scheme, as shown in fig. 1-5, the screw placing drill comprises a straight drill and a bendable drill, and is selected for use according to the development condition of the pedicle of the patient during surgery.

In the scheme, as shown in fig. 1-5, the diameter of the main body of the straight drill bit 1 is 2.0mm, and the straight drill bit 1 is respectively provided with a blunt thread area 1.1, a calibration area 1.2 and a fixing area 1.3 from the top to the bottom, wherein the length of the thread area is 20mm, and the top is blunt, so that the time for the drill bit to penetrate through cortical bone can be prolonged. The length of the scale area 1.2 is 30mm, the surface is provided with electroplated annular scale marks, the interval between the scale marks in the front and rear 10mm areas is 1mm, and the interval between the scale marks in the middle 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom is triangular prism, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

In this scheme, as shown in fig. 1-5, the bendable drill 2 has a main body diameter of 3.0mm, and from top to bottom, the bendable region 2.2, the traveling region 2.3, the calibration region 2.4, and the fixing region 2.5 are provided. The length of the threaded area is 10mm, the diameter is 2.5mm, the top is blunt, and the time for drilling through cortical bone can be prolonged. The bendable region is 10mm in length and 1.5mm in diameter. The transition zone is 5mm in length and gradually becomes thicker from 1.5mm to 3.0mm in diameter. The length of the scale area is 30mm, the surface of the scale area is provided with electroplated annular scale marks, the interval between the scale marks in the front 10mm area and the back 10mm area is 1mm, and the interval between the scale marks in the middle 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom is triangular prism, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

In the scheme, as shown in fig. 1-5, the diameter of the main body of the circuit breaker 3 is 3.5mm, and the circuit breaker 3 is respectively provided with an open circuit area 3.1, a threaded area 3.2, a scale area 3.3 and a fixed area 3.4 from the top to the bottom. The open circuit area is 10mm in length, is in a flat column shape, and is blunt at the top. The cross section of the open circuit area is rectangular, the length is 2.0mm, and the width is 1.0 mm. The threaded zone is 10mm in length and 3.5mm in diameter. The length of the scale area is 30mm, the surface of the scale area is provided with electroplated annular scale marks, the interval between the scale marks in the first 10mm area and the third 10mm area is 1mm, and the interval between the scale marks in the second 10mm area and the fourth 10mm area is 5 mm. The length of the fixing area is 50mm, the main body is smooth cylindrical, and the bottom of the fixing area is triangular prism-shaped, so that the fixing area is convenient to assemble and use with an electric drill for orthopedics department.

The working process is as follows: when the power system is used for embedding the pedicle screw, a safe and effective screw channel needs to be drilled from the rear direction of the vertebral body to the front part of the vertebral body by using the electric drill and the drill bit, the channel is further expanded by using a tap or the electric drill and the circuit breaker, and finally the pedicle screw matched with parameters is screwed in.

In the system, referring to fig. 4, for a patient with a better growth condition of the pedicle screws, an electric drill can be selected to be matched with a straight drill to drill a channel. The operator may feel tactile feedback when the drill touches the bottom of the passageway, i.e., the cortical bone at the leading edge of the vertebral body (fig. 4b), if it is not certain that the drill can continue to operate the drill to continue to rotate the drill 2-3 turns, confirming that the drill is retracted after touching the anterior wall of the vertebral body. Because the drill bit top in this system is the round design, compares conventional orthopedics drill bit and has prolonged the time of boring through the cortex bone, has reserved certain error correction space, directly bores through the cortex of bone and causes blood vessel, neural damage after avoiding the maloperation.

Referring to fig. 5, for pedicle screws with dysplasia or better development but no grip for straight drill bits, an electric drill can be selected to be used together with a bendable drill bit to drill the channel. The operator may feel tactile feedback after the drill touches the pedicle walls (fig. 5 b). After the drill is rotated continuously, the drill bit can change the direction according to stress feedback and go deep along the relatively loose direction (fig. 5 c-d). The operator can adjust the direction of the electric drill in due time according to the bending direction of the drill bit, so that the drill bit can smoothly reach the bottom of the pedicle of vertebral arch channel, namely the front edge cortex of the vertebral body (figure 5 e). The operator feels feedback that the drill bit touches cortical bone of the anterior wall of the vertebral body and withdraws the drill bit. Because the drill bit top in this system is the round design, compares conventional orthopedics drill bit and has prolonged the time of boring through the cortical bone, has reserved certain error correction space, directly bores through pedicle of vertebral arch four walls and centrum leading edge cortex of bone and causes blood vessel, neural damage after avoiding the maloperation.

Referring to fig. 4-5, after drilling the pedicle channels using either a straight or a curved drill, the integrity of the pedicle walls and the underlying cortex can be checked using spherical probes (not shown in detail in this figure). After confirmation the channel was further enlarged using a drill in conjunction with a opener (fig. 4c, d, fig. 5f, g). Because the top of the shunt in the system is blunt and the front 1cm section is unthreaded, the operator can have obvious tactile feedback after touching the bottom of the channel. Even if the electric drill is continuously rotated, the bone cortex can not be drilled through by the open circuit device, and the iatrogenic risk of neurovascular injury can be reduced.

Referring to fig. 4-5, after further enlargement of the tunnel using a spreader, a ball probe can be used to check the integrity of the pedicle wall and bottom cortex (not shown in detail in this figure). After confirmation, the pedicle screws with the matched parameters are screwed in (fig. 4e and 5h), and the screw setting operation is completed.

The safe screw placing drill bit and the open circuit system can be matched with a conventional electric drill for orthopedics department for use and are mainly used for preparing a pedicle screw channel in spinal orthopedic surgery. Due to the exquisite structural design, the device is suitable for patients with different pedicle development conditions, and the iatrogenic blood vessel and nerve injury risks existing in the power system screw placement are reduced. The advantages of the power system screw can be combined, the overall safety of the spinal orthopedic operation can be improved, and the occupational health of an operator can be protected.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications or substitutions based on the above-mentioned technical solutions are included in the scope of the present invention.

Claims

1. The open circuit system is characterized by comprising a nail placing drill bit and an open circuit device, wherein the nail placing drill bit and the open circuit device are sequentially matched with an orthopedic power electric drill to operate when in use, the nail placing drill bit comprises a straight drill bit (1) and a bendable drill bit (2), and the nail placing drill bit is selected to be used according to the development condition of the vertebral pedicle of a patient during surgery; the main body of the open circuit device (3) is respectively provided with an open circuit area (3.1), a thread area (3.2), a scale area (3.3) and a fixed area (3.4) from the top to the bottom, wherein the open circuit area (3.1) is in a flat column shape, and the top is a blunt end; the section of the open circuit area (3.1) is rectangular, the surface of the scale area (3.3) is provided with electroplated annular scale marks, the main body of the fixed area (3.4) is smooth cylindrical, and the tail end of the bottom is triangular prism, so that the electric drill can be conveniently assembled with an electric drill for orthopedics department.

2. The open circuit system provided with the safe nail-placing drill bit in the spinal orthopedic surgery is characterized in that the straight drill bit (1) is respectively provided with a threaded area (1.1), a scale area (1.2) and a fixed area (1.3) from top to bottom, wherein the top of the threaded area (1.1) is a blunt head, the time for the drill bit to penetrate through cortical bone is prolonged, the surface of the scale area (1.2) is provided with electroplated annular scale marks, the main body of the fixed area (1.3) is smooth cylindrical, and the tail end of the bottom is triangular prism-shaped, so that the open circuit system is convenient to be assembled with an orthopedic electric drill for use.

3. The open circuit system provided with the safety nail placing drill bit in the spine orthopedic surgery according to the claim 1, characterized in that the bendable drill bit (2) is a thread area (2.1), a bendable area (2.2), a moving area (2.3), a scale area (2.4) and a fixing area (2.5) from top to bottom; wherein the top of the threaded area (2.1) is a blunt end, so that the time for drilling through cortical bone is prolonged, the diameter of the moving area (2.3) is gradually increased from the bendable area to the scale area, the surface of the scale area (2.4) is provided with electroplating annular scale marks, the main body of the fixed area (2.5) is smooth and cylindrical, and the bottom end is triangular prism-shaped, so that the orthopedic electric drill can be conveniently assembled and used.