CN209916225U - Device for measuring cervical curvature change in operation - Google Patents

Abstract

The utility model provides a measure device that cervical vertebra curvature changes in art, including light source subassembly and scale subassembly, a base and a cradling piece all have, the cradling piece all is 180 with the installation direction of base, have two light sources that can launch directional beam and arrange from top to bottom on the light source subassembly, the cervical vertebra curvature scale theta that the light source that is located the below on the scale direct point on the scale indicates is arcos (a/L) -beta, wherein, distance between two light sources is definite value an, the direct point distance of two light sources on the scale is L, the default of the contained angle between scale and second cradling piece is beta, the scale marks theta. The utility model discloses in, can realize in the operation real-time measurement cervical vertebra curvature and change through light source subassembly and scale subassembly, do benefit to going on smoothly of operation, alleviate patient's misery.

Description

Device for measuring cervical curvature change in operation

Technical Field

The utility model relates to a measuring device, concretely relates to intraoperative device for measuring cervical vertebra curvature change.

Background

The curvature of the cervical vertebrae is the degree of forward bending of the cervical vertebrae. The normal cervical vertebrae are physiologically forward-convex, and the curvature of cervical vertebrae is reduced when degeneration occurs, which is manifested as disappearance of the curvature of cervical vertebrae or even retroflexion of cervical vertebrae. Correcting the abnormal cervical curvature of patients with cervical spondylosis is one of the purposes of surgical treatment of cervical spondylosis. In addition, for patients with cervical spine having posterior convex deformity (congenital, iatrogenic, etc.), an orthopedic operation is often required to correct the posterior convex deformity of the cervical spine and restore the normal physiological lordosis of the cervical spine.

At present, the curve of the cervical vertebra is measured clinically by adopting a Cobb angle method. The specific measurement method comprises the following steps: on the cervical vertebra lateral neutral position X sheet, tangent lines are respectively made from the lower edge of the C2 vertebral body and the lower edge of the C7 vertebral body, and the included angle between the tangent lines is taken as the curvature value of the cervical vertebra, as shown in figure 1. Before the clinical cervical vertebra operation, a patient needs to take an X-ray picture of the lateral median position of the cervical vertebra, and then a doctor draws an auxiliary line on the X-ray picture by adopting a Cobb angle method and measures the curvature of the cervical vertebra. If the cervical curvature orthopedic condition needs to be known in the operation, the cervical curvature can only be estimated by experience through the image provided by the C-arm machine perspective, and the real-time cervical curvature measurement cannot be carried out in the operation process. When the patient is subjected to follow-up examination after the operation, a cervical vertebra lateral neutral X-piece needs to be taken again, and the curvature of the cervical vertebra is measured by a doctor on a new X-piece by adopting a Cobb angle method. The variable quantity of the cervical curvature of the two times is the operation correction quantity. If the degree of orthopedics is not satisfactory after the operation, the correction cannot be made any more.

The current measurement method has the following disadvantages:

1) the curve variation of the cervical vertebra can not be measured in real time in the operation process.

2) The workload is large and the efficiency is low. The physician can use the Cobb angle method to draw the measured curvature on the X-ray film after taking the X-ray film.

3) The measurement accuracy is not high. Since the Cobb angle method requires manual drawing by a physician, the measurement accuracy is related to the drawing method and habit of the physician.

4) The harm to the patient is large. X-ray radiation is harmful to the health of the patient, and repeated C-arm fluoroscopy during surgery can also have radiation effects on the patient and the doctor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brand-new device that is arranged in operation real-time measurement cervical vertebra curvature to change can solve the unable real-time measurement cervical vertebra curvature change in the operation of the Cobb angle measurement method that adopts at present clinically, and work load is big low with high efficiency, and measurement accuracy is not high, and injures big problem to patient and doctor.

In order to achieve the above object, the utility model provides a measure device that cervical vertebra curvature changes in art, include:

the light source assembly comprises a first bracket, the first bracket consists of a first base and a first bracket rod arranged on the first base, and the installation direction of the first bracket rod and the first base is 180 degrees; the first support rod is provided with two light sources which can emit directional light beams and are arranged up and down, the direction of the directional light beams is vertical to the first support rod, and the two light sources can be synchronously adjusted up and down along the first support rod;

the scale assembly comprises a second support, the second support consists of a second base and a second support rod arranged on the base, and the mounting direction of the second support rod and the second base is 180 degrees; a scale is arranged on the second support rod, can be adjusted up and down along the second support rod, and can be locked at any angle with the second support rod;

the distance between the two light sources is a fixed value a, the distance between the two light sources and the straight points of the two light sources on the scale is L, the preset value of the included angle between the scale and the second support rod is beta, the scale is marked with cervical vertebra curvature scales theta, and the scales theta pointed by the straight points of the light sources located below on the scale are arcos (a/L) -beta.

Wherein, first support and second support all are used for fixing at the cervical vertebra position, and one side of first base and second base can be but not limited to adopt the stereoplasm needle to be fixed in the operation on the cervical vertebra.

The first stent and the second stent are made of metal, polymer synthetic material or other hard materials, and the metal material can be, but is not limited to, medical stainless steel material, titanium alloy material, cobalt-based alloy material or magnesium alloy material; the polymer material may be, but is not limited to, nylon, polyester resin, polyacrylate, polytetrafluoroethylene, or polyurethane.

The light source is arranged on the first support rod and can emit directional light beams, the color can be any color in a visible light wavelength range, the type can be laser or any other common light source with a light gathering function, the distance between the two light sources is set to be a determined value, the directions of the two emitted light beams are the same and are perpendicular to the support, and the light sources can be synchronously adjusted up and down along the support.

Wherein, the distance between the two light sources can be, but is not limited to, 5mm to 150mm for the convenience of the doctor and the application to different people.

Preferably, in the device for measuring the change in the curvature of the cervical vertebrae in the operation, the first base and the second base have the same structure and are provided with mounting interfaces for fixing the support rods, and the first support rod and the second support rod have the same structure and are fixed in the mounting interfaces through mechanical latches or threads, so that the support rods can be conveniently mounted and dismounted on the bases.

Wherein, the installation interface that is 180 degrees with base installation direction, after the installation cradling piece, the cradling piece is parallel with the sagittal plane, mainly used sagittal plane curvature measurement.

Preferably, in the apparatus for intraoperative measurement of cervical curvature change, the light source is a laser emitter.

Preferably, in the device for measuring the change of the curvature of the cervical vertebra in the operation, the two light sources are fixed on a mounting seat at a fixed interval, a sliding block is arranged on the back surface of the mounting seat, a sliding groove is formed in the first support rod along the axial direction of the first support rod, and the sliding block is in clearance fit with the sliding groove.

Preferably, in the device for measuring the curvature change of the cervical vertebrae during the operation, the two light sources are fixed on a mounting seat at a fixed interval, a fastening member (such as a clip, a buckle, a collar and the like) is arranged on the back surface of the mounting seat, and the mounting seat is fixed on the first support rod through the fastening member.

Preferably, in the intraoperative device for measuring the change of the curvature of the cervical vertebrae, the second support rod is provided with a mounting groove along the axial direction thereof, the back of the scale is provided with a connecting column, the connecting column is embedded in the mounting groove and is in clearance fit with the mounting groove, and the scale is formed, slides up and down along the mounting groove through the connecting column and can rotate around the connecting column as a shaft.

Preferably, in the device for measuring the curvature change of the cervical vertebrae during the operation, the mounting groove is a through groove along the axial direction or a plurality of hole grooves arranged at intervals along the axial direction.

The clearance fit mentioned in the present invention requires to maintain a very small fit clearance, has a certain relative movement, requires a precisely positioned fit, but does not require free rotation, the clearance fit tolerance is generally of the H/g type, such as H6/g5, and the tightness of the clearance fit belongs to the conventional technique of tolerance selection in the mechanical field, and therefore, is not described in detail herein.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the device can measure the curvature and the variable quantity of the cervical vertebra in real time in the operation process;

2) the device can be conveniently finished on an operating table by an operator without increasing extra workload, so that the efficiency is higher;

3) the measuring result of the device is directly read from the scale, the precision is high, and the error of manual operation of doctors does not exist;

4) the device can be taken out after the operation is finished, and has no any harm or side effect on the patient.

Drawings

FIG. 1 is a schematic diagram of a cobb angle measurement method for cervical vertebra curvature in the prior art;

FIG. 2 is a schematic view of the structure of the light source module of the present invention;

FIG. 3 is a schematic structural view of the middle scale assembly of the present invention;

FIG. 4 is a schematic diagram of the curvature measurement of the middle cervical vertebrae according to the present invention;

FIG. 5 is a schematic view of the right triangle formed by the light ray and the scale in FIG. 4;

fig. 6 is a schematic view of the middle scale of the present invention.

In the figure:

1-light source assembly, 11-first bracket, 111-first base, 112-first bracket bar, 12-light source; 2-scale assembly, 21-second carriage, 211-second base, 212-second carriage bar, 22-scale.

Detailed Description

The device for measuring the change in curvature of cervical vertebrae according to the present invention will be described in more detail with reference to the drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

The device comprises a light source assembly 1 and a scale assembly 2.

Referring to fig. 2, the light source assembly 1 is composed of a first support 11 and a light source 12. The first support 11 includes a first base 111 for fixing to the cervical vertebra and a first support rod 112 for installing the light source 12, and the first support rod 112 and the first base 111 may be fixedly connected as a whole or detachably connected. Specifically, in the present embodiment, the first base 111 can be surgically fixed to the cervical vertebrae by using a hard needle and has a mounting interface for mounting the first support rod 112, so as to facilitate the mounting and dismounting of the first support rod 112 on the first base 111. The mounting direction of the mounting interface and the first base 111 is 180 degrees, and the first support rod 112 mounted in the mounting interface is parallel to the sagittal plane and is used for measuring the curvature of the sagittal plane in real time in the operation, namely measuring the curvature of the cervical vertebra. The first frame bar 112 and the first base 111 are preferably detachably connected, and the first frame bar 112 is detachably fixed in the mounting interface by a mechanical lock, a screw thread, a buckle, or the like.

Two light sources 12 are mounted on the first support rod 112, and the distance between the two light sources 12 is a fixed value a, which may be, but is not limited to, 5 mm-150 mm, preferably 65 mm-85 mm for the convenience of the doctor to operate and for different people. The two light sources 12 can be adjusted up and down along the first supporting bar 112 while keeping the distance a on the first supporting bar 112 constant. The two light sources 12 and the first support rod 112 may be connected in a manner that the two light sources 12 are fixed on a mounting base at a fixed interval, a sliding block is arranged on the back surface of the mounting base, the first support rod 112 is provided with a sliding groove along the axial direction thereof, the sliding block is in clearance fit with the sliding groove, so that the two light sources 12 can be synchronously adjusted up and down along the first support rod 112, of course, the sliding groove may also be a sliding rail arranged on the first support rod, and a limiting part is arranged in the sliding rail, so that the mounting base can be positioned in the sliding; or the back of the mounting seat is provided with a fastener such as a buckle, a hoop, etc., and the mounting seat is fixed on the first support rod 112 through the fastener, so as to realize the synchronous adjustment of the positions of the two light sources 12 on the first support rod 112. Of course, it is understood that in other embodiments, other mechanical fixing means capable of achieving the synchronous movement adjustment of the light source 12 on the first support rod 112 can be applied to the present device.

The light sources 12 may emit directional light beams with any color in the visible wavelength range, and may be of the type of laser or any other common light source with a light condensing function, and the two light beams emitted by the two light sources 12 have the same direction and are perpendicular to the first support rod 112.

Referring to fig. 3, the scale assembly 2 is composed of a second support 21 and a scale 22. The second support 21 comprises a second base 211 capable of being fixed to the cervical vertebra and a second support rod 212 for mounting the scale 22, and the second support rod 212 and the second base 211 can be fixedly connected integrally or detachably. Specifically, in this embodiment, the second base 211 can be surgically fixed to the cervical vertebrae by using a hard needle and has a mounting interface for mounting the second support rod 212, so as to facilitate the mounting and dismounting of the second support rod 212 on the second base 211. The mounting direction of the mounting interface and the second base 211 is 180 degrees, and the second support rod 212 mounted in the mounting interface is parallel to the sagittal plane and is used for measuring the curvature of the sagittal plane in real time in the operation, namely measuring the curvature of the cervical vertebra. The second support rod 212 and the second base 211 are preferably detachably connected, and the second support rod 212 is fixedly mounted on the second base 211 by mechanical locking, screwing, snapping, etc.

The scale 22 is movably installed on the second support rod 212, the upper and lower positions thereof can be adjusted up and down along the first support rod 112 according to the requirement, and the scale 22 is marked with a specific scale value for displaying the cervical curvature of the patient. Considering that some patients have a small curvature of cervical vertebrae, according to the principle of the device (i.e. trigonometric relation mentioned below), the distance that can be displayed on the scale 22 will be small even if the curvature of cervical vertebrae is small. In order to avoid the reading error under the special condition, therefore, the scale 22 is movably installed on the second support rod 212, so that the fixed included angle between the scale 22 and the second support rod 212 can be changed conveniently according to the actual requirement, and the device has stronger practicability.

Specifically, scale 22 and second cradling piece 212's mounting means can be but not limited to following mode, set up the mounting groove along the axial on second cradling piece 212, the mounting groove can be axial logical groove or a plurality of hole groove of axial interval arrangement, the back of scale sets up the spliced pole, the spliced pole embedding in the mounting groove and with mounting groove clearance fit, the scale is installed in the mounting groove on the second cradling piece by the spliced pole, make the scale can follow the mounting groove and reciprocate and can the spliced pole be rotatory for the axle, thereby realize the regulation and the location of position and angle. It can be understood that, in order to lock the scale 22 and the second support rod 212 at a certain angle, a nut and other locking components can be adopted, when the scale 22 is adjusted to a proper angle and position, the connecting column is fixed on the second support rod 212 by the nut, and the relative connecting column is more firmly fixed with the mounting groove in a clearance fit manner.

The first bracket 11 and the second bracket 21 are made of metal, polymer composite material or other hard materials, and the metal material can be, but is not limited to, medical stainless steel material, titanium alloy material, cobalt-based alloy material or magnesium alloy material; the polymer material may be, but is not limited to, nylon, polyester resin, polyacrylate, polytetrafluoroethylene, or polyurethane.

When the ruler is used, the light source assembly 1 is fixed on the C2 spinous process, the ruler assembly 2 is vertically fixed on the C7 spinous process, and the position of the light source 12 on the light source assembly 1 is adjusted to enable the two beams of light D1 and D2 to directly irradiate the ruler assembly 2; the position of the scale 22 on the scale assembly 2 is adjusted so that the upper ray D1 is directed at the s scale in the scale (i.e. the base line position), and the scale θ 1 indicated by the lower ray D2 at that time is recorded. The theta 1 at this time is the current cervical curvature angle value (the scale is printed on the scale and can be read directly). For the integrated stent, the stent may not be removed during the operation, or the stent may be removed if the physician can ensure that the positions of the first stent and the second stent installed in the second pass of the operation are completely consistent with the positions of the first stent and the second stent installed in the previous pass; for the separated bracket, the two bracket rods can be taken down in the operation, and the positions of the two bases are ensured to be unchanged. When measurement is needed after surgery, the light source 12 on the light source assembly 1 and the scale 22 on the scale assembly 2 are moved again, so that the light ray D1 is directly projected to the s scale, and the scale θ 2 indicated by the light ray D2 at this time is recorded. The angle at this time is the current cervical vertebral bending angle. And calculating theta 2-theta 1, namely the curvature of the postoperative change of the cervical vertebra.

Referring to fig. 4, at the direct point of the upper light ray D1 on the scale 22, a segment parallel to the first frame bar 112 and perpendicular to the lower light ray D2 is formed, and forms a right triangle with the scale 22 as shown in fig. 4. Referring to fig. 5, a schematic view of the right triangle is shown, a right-angle side with a length a represents a fixed distance between two light sources 12, and is known, a length L of a hypotenuse is a distance between points of the two light sources 12 directly incident on the left-side ruler 22, an included angle α is an included angle between the first support rod 112 and the ruler 22, an included angle between the ruler 22 and the second support rod 212 is preset to be β, and a cervical vertebra bending angle θ is α - β. According to the cosine law, the trigonometric function relationship between the angle α and the length L of the two spot indication spaces on the scale 22 is α ═ arcos (a/L). The scale 22 is marked with an angle directly, as shown in fig. 6, the uppermost is marked with s, the distance a below s is marked with 0 °, and the distance x from the 0 ° is marked with Cobb angle θ (i.e. the cervical curvature or the cervical lateral curvature), L is a + x, i.e. the Cobb angle θ satisfies the mathematical relationship cos (θ + β) is a/(a + x), so as to obtain θ is arcos (a/L) - β.

Example 2

In this example, the first support 11 and the second support 21 are both made of medical grade 316L stainless steel, the fixing parts of the first base 111 and the second base 211 are designed as two parallel metal needles, the support rods are installed in the direction parallel to the metal needles, the two light sources 12 are red laser point light sources 12, the distance between the light sources 12 is 20mm, the angle between the scale 22 and the support is 0 °, the total length of the scale 22 is 50mm, the scale is made of composite materials, S is marked on the uppermost part of the scale 22, 0 is marked at 20mm below S, and the marked cervical vertebra curvature scale θ at the position of 0 ° down to the distance x (unit is millimeter, mm) is cos (θ) ═ 20/(20+ x).

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims (7)

1. An intraoperative device for measuring cervical curvature changes, comprising:

the light source assembly comprises a first bracket, the first bracket consists of a first base and a first bracket rod arranged on the first base, and the installation direction of the first bracket rod and the first base is 180 degrees; the first support rod is provided with two light sources which can emit directional light beams and are arranged up and down, the direction of the directional light beams is vertical to the first support rod, and the two light sources can be synchronously adjusted up and down along the first support rod;

the scale assembly comprises a second support, the second support consists of a second base and a second support rod arranged on the base, and the mounting direction of the second support rod and the second base is 180 degrees; a scale is arranged on the second support rod, can be adjusted up and down along the second support rod, and can be locked at any angle with the second support rod;

the distance between the two light sources is a fixed value a, the distance between the two light sources and the straight points of the two light sources on the scale is L, the preset value of the included angle between the scale and the second support rod is beta, the scale is marked with cervical vertebra curvature scales theta, and the scales theta pointed by the straight points of the light sources located below on the scale are arcos (a/L) -beta.

2. The apparatus as claimed in claim 1, wherein the first and second bases have the same structure and have mounting interfaces for fixing the support rods, and the first and second support rods have the same structure and are fixed in the mounting interfaces by means of screw threads.

3. The apparatus of claim 1, wherein the light source is a laser emitter.

4. The apparatus as claimed in claim 1, wherein the two light sources are fixed to a mounting base at a constant interval, a sliding block is provided on a back surface of the mounting base, the first support rod is provided with a sliding groove along an axial direction thereof, and the sliding block is in clearance fit with the sliding groove.

5. The apparatus as claimed in claim 1, wherein the two light sources are fixed to a mounting base at a predetermined interval, and a fastening member is provided on a rear surface of the mounting base, and the mounting base is fixed to the first frame bar by the fastening member.

6. The apparatus of claim 1, wherein the second support rod has a mounting groove along an axial direction thereof, and a connection post is provided on a rear surface of the scale, the connection post being inserted into the mounting groove and being in clearance fit with the mounting groove, so that the scale slides up and down along the mounting groove via the connection post and can rotate around the connection post.

7. The apparatus of claim 6, wherein the mounting groove is a plurality of holes spaced along an axial direction.

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