CN111657864A

CN111657864A - Nerve tension detector

Info

Publication number: CN111657864A
Application number: CN202010559289.6A
Authority: CN
Inventors: 徐锡明; 史建刚; 李翔
Original assignee: Shanghai Changzheng Hospital
Current assignee: Shanghai Changzheng Hospital
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-09-15

Abstract

The invention provides a nerve tension detector, and belongs to the field of medical instruments. The nerve tension detector provided by the invention comprises: a support; the force sensor is arranged on the bracket and used for measuring the tension of the nerve; the force measuring piece is arranged on the force measuring sensor and used for pulling the nerve; the driving assembly is used for driving the force measuring piece to pull the nerve; the switch piece is used for controlling the opening or closing of the driving piece; and the display screen is in communication connection with the force measuring sensor and is used for displaying the tension of the nerves. The nerve dynamometer provided by the invention can detect the tension of the nerve of a patient at any time when a lumbar surgery is performed, and the display screen can display the measured tension value in real time so as to provide real-time data reference for smooth operation.

Description

Nerve tension detector

Technical Field

The invention relates to the field of medical instruments, in particular to a nerve tension detector.

Background

Lumbar intervertebral disc protrusion is a common degenerative disease of the spine, and is often seen in the middle-aged and the elderly. Both minimally invasive and traditional surgery involve surgical risks, and particularly, the concurrent foot drop can seriously affect the limb functions and the quality of life of patients. The main reason causing the foot drop is the weakness of the anterior muscle group of the lower leg, the muscle group is dominated by the common peroneal nerve, and the high tension of the nerve root is one of the risk factors of the foot drop after the operation of the lumbar intervertebral disc protrusion according to the related research.

However, there is no apparatus for measuring nerve tension in lumbar intervertebral disc protrusion operation in the prior art, so that nerve tension cannot be well controlled within a proper range.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a nerve tension detector for detecting the tension of a nerve of a patient subjected to a lumbar surgery.

The present invention provides a nerve tension detector having the characteristics comprising: a support; the force sensor is arranged on the bracket and used for measuring the tension of the nerve; the force measuring piece is arranged on the force measuring sensor and used for pulling the nerve; the driving assembly is used for driving the force measuring piece to pull the nerve; the switch piece is used for controlling the opening or closing of the driving piece; and the display screen is in communication connection with the force measuring sensor and is used for displaying the tension of the nerves.

The nerve tension detector provided by the present invention may further have the following features: wherein, the dynamometry piece includes: one end of the fixed rod is fixed on the force sensor; and the movable rod is arranged on the fixed rod, one end of the movable rod, which is far away from the force measuring sensor, is in a hook shape, and the movable rod is connected with the driving assembly and used for moving along the length direction of the fixed rod under the driving of the driving piece.

The nerve tension detector provided by the present invention may further have the following features: wherein the diameter of the fixing rod is 2mm-5mm, the length of the fixing rod is 250mm-350mm, and the length of the fixing rod positioned outside the shell is 150mm-180 mm.

The nerve tension detector provided by the present invention may further have the following features: wherein, drive assembly includes: the scroll is arranged on the bracket and used for pulling the movable rod to move; and a motor for driving the reel.

The nerve tension detector provided by the present invention may further have the following features: wherein, the spool includes: the shaft lever is rotatably arranged on the bracket; and one end of the shaft belt is fixedly arranged on the shaft rod, and the other end of the shaft belt is fixedly connected with one end of the movable rod close to the force measuring sensor.

The nerve tension detector provided by the present invention may further have the following features: wherein, the load cell includes: a load cell body; and a load cell power cord for connecting the load cell body and the power source.

The nerve tension detector provided by the present invention may further include: the shell is sleeved outside the bracket; and one end of the spring is connected with the shell, and the other end of the spring is connected with the bracket and used for keeping the initial position of the force measuring piece under no load.

The nerve tension detector provided by the present invention may further have the following features: the force measuring piece is in a rod shape, one end of the force measuring piece, which is arranged on the force measuring sensor, is positioned in the shell, and the other end of the force measuring piece is positioned outside the shell; the switch piece and the display screen are embedded on the shell.

The nerve tension detector provided by the present invention may further have the following features: wherein, the shell is a cylinder or a polygonal column.

The nerve tension detector provided by the present invention may further have the following features: wherein, the force cell is a pressure sensor with the measuring range of at least 5N and the precision of at least 0.001N.

Action and Effect of the invention

According to the nerve tension detector provided by the invention, because the nerve tension detector is provided with the bracket, the force measuring sensor, the fixed rod, the movable rod, the scroll, the motor, the switch piece and the display screen, the nerve tension detector can detect the tension of the nerve of a patient at any time when a lumbar surgery is performed, and the display screen can display the measured tension value in real time so as to provide real-time data reference for smooth operation.

Drawings

FIG. 1 is a schematic diagram of a nerve tension detector in an embodiment of the present invention; and

fig. 2 is a sectional view of a nerve tension detector in an embodiment of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is specifically described below by combining the embodiment and the attached drawings.

< example >

Fig. 1 is a schematic structural diagram of a nerve tension detector in an embodiment of the present invention.

As shown in fig. 1, the present embodiment provides a nerve tension detector 100, which includes: bracket 10, load cell 20, fixed bar 30, movable bar 40, reel 50, motor (not shown), switch 60, display 70, housing 80, and spring 90.

The bracket 10 is a rectangular parallelepiped for supporting the load cell 20, the fixed bar 30, the movable bar 40, and the reel 50, and providing a fulcrum for the movable bar 40 to measure the force.

The load cell 20 includes a load cell body 21 and a load cell lead 22. The load cell body 21 is fixedly mounted above the bracket 10 by 2 screws. The load cell lead 22 has one end connected to the load cell body 21 and the other end extending out of the housing 80 for connection to an external power source for supplying power to the load cell body 21. In other embodiments, the load cell body 21 may be powered by a battery or a button cell, thereby eliminating the need for the load cell wires 22. In the present embodiment, the load cell body 21 is a pressure sensor having a range of 10N and an accuracy of 0.001N. Specifically, in the present embodiment, the load cell 20 is a model SBT674 sensor manufactured by sbot electronics, inc.

The fixing rod 30 has one end fixed to the load cell 20 and the other end extending out of the housing 80. In this embodiment, the fixing bar has a diameter of 3mm and a length of 300mm, wherein the length of the outer portion exposed out of the housing 80 is 10 mm. In other embodiments, the fixation rod 30 may include an inner housing rod located inside the housing 80 and an outer housing rod located outside the housing. The inner rod of the shell is detachably connected with the outer rod of the shell. Such design can conveniently carry out medical disinfection to the casing outer tube. Further, since the fixing rod 30 requires bending strength, it is necessary to use 45 steel, 40Cr steel, or 42CrMo steel for modulation. Specifically, the connection manner of the fixing rod 30 and the load cell 20 may vary according to the signal of the load cell 20, and the connection manner is based on the fact that the load cell 20 can accurately detect the nerve tension.

The movable rod 40 is movably arranged on the fixed rod 30 and is the same as the extending direction of the fixed rod 30, one end of the movable rod 40 is connected with the scroll 50 and is positioned in the shell 80, the other end of the movable rod is hook-shaped and penetrates through the shell 80, the radian of the hook can be designed and adjusted according to actual needs, and the hook is used for hooking nerves when detecting the nerve tension. When the reel 50 rotates, the movable lever 40 also moves along the length of the fixed lever 30. In this embodiment, the movable lever 40 moves in a range of 0mm to 5 mm. Similar to the fixed rod 30, the portion of the movable rod 40 located outside the housing 80 and the portion located inside the housing 80 may be designed to be detachably connected, thereby facilitating medical sterilization. The movable bar 40 is also made of the same material as that of the fixed bar 30.

The reel 50 includes a shaft 51 and a reel strap (not shown). The shaft 51 is rotatably disposed on the stand 10 and is driven to rotate by the motor. One end of the shaft belt is fixed on the shaft lever 51, and the other end is fixedly connected with one end of the movable rod 40 positioned in the shell 80. When the motor rotates in the forward direction, the shaft band is paid out along with the rotation of the shaft body 51, so that the movable lever 40 is moved away from the shaft body 51; when the motor is rotated in the reverse direction, the shaft band is wound around the shaft body 51, thereby pulling the movable lever 40 close to the shaft body 51. In this embodiment, the shaft 51 has a diameter of 3mm and a length of 30mm and is made of tempered 45 steel.

The motor is used for driving the shaft 51 to rotate and is arranged in the shell 80. In other embodiments, the motor may be mounted outside the housing 80 according to actual requirements.

The housing 80 is sleeved outside the bracket 10, and in the embodiment, the housing 80 is a cylindrical housing with an outer diameter of 32mm, an inner diameter of 30mm and a height of 135 mm. In other embodiments, the housing 80 may take other shapes, such as polygonal prism.

The spring 90 has one end connected to the inner surface of the housing 80 and one end connected to the bracket 10, and serves to maintain the initial positions of the fixed lever 30 and the movable lever 40 under no load, thereby ensuring the accuracy of nerve tension detection.

The switch 60 is embedded in the housing 80 and electrically connected to the motor. In this embodiment, the switch member 60 is a cylindrical button having a diameter of 4mm and a length of 13mm, and when pressed, the motor starts to operate, and otherwise the motor stops operating.

The display screen 70 is embedded in the housing 80, is in communication with the load cell 20, and is used for displaying the nerve tension value obtained by the load cell test to the medical staff.

The use method of the nerve tension detector 100 provided by the embodiment comprises the following steps:

s1, accurately debugging and disinfecting the nerve tension detector 100;

s2, hooking the nerve to be tested by using the movable rod 40;

s3, the switch 60 is pressed down, and the motor drives the movable rod 40 to move 5mm along the length direction of the fixed rod 30;

s4, the load cell 20 detects the corresponding nerve tension and displays it on the display screen 70.

Taking the pressure sensor with the measuring range of 10N and the precision of 0.001N adopted in the embodiment as an example, the maximum measuring range of the force measuring device of the embodiment is 5N, the precision is 0.0005N, and the test error is 2.75%.

Effects and effects of the embodiments

According to the nerve tension detection meter related to the embodiment, because the nerve tension detection meter is provided with the bracket, the force cell, the fixed rod, the movable rod, the scroll, the motor, the switch piece and the display screen, the nerve dynamometer provided by the embodiment can detect the tension of the nerve of a patient at any time when a lumbar surgery is performed, and the display screen can display the measured tension value in real time so as to provide real-time data reference for smooth operation.

Further, according to the nerve tension meter of the present embodiment, since the housing and the spring are further provided, the nerve dynamometer provided by the present embodiment can maintain the initial position of the fixed rod and the movement under no load, thereby ensuring the accuracy of the nerve tension detection.

The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.

Claims

1. A nerve tension detector for detecting tension of a nerve of a patient who has undergone a lumbar surgery, comprising:

a support;

a load cell mounted on the support for measuring the tension of the nerve;

the force measuring piece is arranged on the force measuring sensor and used for pulling the nerve;

the driving assembly is used for driving the force measuring piece to pull the nerve;

the switch piece is used for controlling the opening or closing of the driving piece;

and the display screen is in communication connection with the force measuring sensor and is used for displaying the tension of the nerve.

2. The nerve tension tester of claim 1, wherein:

wherein, the dynamometry piece includes:

one end of the fixed rod is fixed on the force sensor; and

the movable rod is arranged on the fixed rod, one end of the movable rod, far away from the force measuring sensor, is in a hook shape, and the movable rod is connected with the driving assembly and used for moving along the length direction of the fixed rod under the driving of the driving piece.

3. The nerve tension detector of claim 2,

the diameter of the fixing rod is 2mm-5mm, the length of the fixing rod is 250mm-350mm, and the length of the fixing rod, which is positioned outside the shell, is 150mm-180 mm.

4. The nerve tension detector of claim 2, wherein:

wherein the drive assembly comprises:

the reel is arranged on the bracket and used for pulling the movable rod to move; and

a motor for driving the reel.

5. The nerve tension detector of claim 4, wherein:

wherein the reel includes:

a shaft rotatably mounted on the bracket; and

and one end of the shaft belt is fixedly arranged on the shaft rod, and the other end of the shaft belt is fixedly connected with one end of the movable rod, which is close to the force measuring sensor.

6. The nerve tension tester of claim 1, wherein:

wherein the load cell comprises:

a load cell body; and

and the force measuring sensor power line is used for connecting the force measuring sensor main body and the power supply.

7. The nerve tension detector of claim 1, further comprising:

the shell is sleeved outside the bracket; and

and one end of the spring is connected with the shell, and the other end of the spring is connected with the bracket and used for keeping the initial position of the force measuring piece under no load.

8. The nerve tension detector of claim 7,

the force measuring piece is in a rod shape, one end of the force measuring piece, which is arranged on the force measuring sensor, is positioned in the shell, and the other end of the force measuring piece is positioned outside the shell;

the switch piece and the display screen are embedded on the shell.

9. The nerve tension detector of claim 7,

wherein, the shell is a cylinder or a polygonal column.

10. The nerve tension detector of claim 1,

the force measuring sensor is a pressure sensor with the measuring range of at least 5N and the precision of at least 0.001N.