Combined artificial sternum support for pectus carinatum correction

Abstract

The present application relates to the field of medical devices, in particular to a combined artificial sternum support for pectus carinatum correction. It comprises a first correction plate, a second correction plate and a third correction plate connected by assembly. When it is necessary to be taken out, it can be changed into a shape convenient for taking out, avoiding turning it over and reducing the difficulty of taking out. The second correction plate comprises a plurality of unit plates, the unit plates, the first correction plate and the third correction plate are connected by connecting steel wires, the first correction plate and the second correction plate are provided with a tight line device capable of tightening the connecting steel wires, the connecting steel wires are relaxed when the support is placed and taken out, the support is in a movable chain structure, and the placement and taking out are very convenient. At the same time, the tightness of the connecting steel wires is adjusted by the tight line device, a new correction method of stepwise reduction is adopted during correction, the connecting steel wires are tightened by one gradient every interval, the arching radius of the support is gradually increased, and great damage to the sternum and intercostal muscles caused by one-time lifting of the sternum is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a combined artificial sternal support for pectus excavatum correction. Background Technology

[0002] Pectus excavatum is a common congenital chest wall deformity characterized by inward depression of the sternum and adjacent costal cartilages, creating a funnel-shaped chest appearance. This deformity is usually noticeable in childhood or adolescence, and may affect cardiopulmonary function and lead to feelings of inferiority in patients. The Nuss procedure is a minimally invasive surgery used to correct pectus excavatum. First proposed by Dr. Donald Nuss in 1998, it has now become one of the mainstream methods for treating pectus excavatum. During the Nuss procedure, a steel plate pre-bent to fit the curvature of the patient's chest is inserted in reverse into the medial side of the sternum. The plate is then flipped so that the arched part of the plate lifts the patient's sternum, and the incision is sutured to fix the plate in place.

[0003] The plate inserted into the patient's chest cavity during the Nuss procedure needs to be removed after the sternum has stabilized, typically 2-3 years post-surgery. Removal requires flipping the plate, which is difficult due to its limited mobility caused by surrounding tissues. This is especially problematic when the plate passes through the precordial region during extraction, as prolonged retention can lead to adhesions to the pericardium or cardiac tissue, or even cardiac damage due to improper handling. Furthermore, existing Nuss procedure plates require pre-bending to a suitable angle during installation, which is cumbersome. Regardless of whether the plate is flipped, the pre-bent plate exerts significant pressure on the sternum during insertion, potentially causing substantial damage to the chest cavity and increasing post-operative pain. The information disclosed in the Background section of this invention is intended merely to enhance understanding of the general background of the invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a combined artificial sternal support for pectus excavatum correction, thereby solving the problem of difficult removal of the steel plate in existing Nuss surgery.

[0005] Another objective of this invention is to solve the problems of the cumbersome use of existing Nuss surgical plates, the significant damage to the sternum and pleural cavity during correction, and the resulting postoperative pain for patients.

[0006] The present invention provides a combined artificial sternal support for pectus excavatum correction, comprising a first orthopedic plate, a second orthopedic plate, and a third orthopedic plate. The first and third orthopedic plates are located at opposite ends of the second orthopedic plate. The second orthopedic plate comprises several unit plates, which, along with the first and third orthopedic plates, are connected in series by connecting steel wires. Both the first and third orthopedic plates are equipped with a tensioning device, which is configured to tighten the connecting steel wires to bend the several unit plates into a preset shape, thereby lifting the sternum.

[0007] Optionally, the tensioning device includes an adjustment knob, a cone, and a connecting bolt;

[0008] The first and second orthopedic plates are provided with a first mounting hole and a second mounting hole, which are coaxial and connected in the center. The adjustment knob is rotated in the first mounting hole, and the cone is set in the second mounting hole with its small end close to the adjustment knob. The two sides of the cone are provided with wire-passing holes for connecting steel wires to pass through. The connecting bolt passes through the cone and is screwed to the adjustment knob. An elastic element is sleeved on the adjustment knob, which makes the adjustment knob tend to move away from the bottom of the first mounting hole.

[0009] An inclined spring is provided on the end face of the adjustment knob opposite to the bottom wall of the first mounting hole. The inclined spring is configured to tilt backward and downward in the direction of rotation of the adjustment knob to tighten the connecting steel wire. A positioning groove is provided on the bottom wall of the first mounting hole. The positioning groove allows the inclined spring to be inserted into it and cooperates with the inclined spring to prevent the adjustment knob from releasing the connecting steel wire.

[0010] Optionally, a flexible protective sleeve is provided on the outer side of the unit plate, and both ends of the flexible protective sleeve can be fixed to the first orthopedic plate and the end of the third orthopedic plate near the second orthopedic plate.

[0011] Optionally, one of the ends of the third orthotic plate and the first orthotic plate away from the second orthotic plate is provided with a binding and fixing plate, and the other is provided with a binding auxiliary plate, which can be detached.

[0012] Optionally, the binding auxiliary plate is provided with a first binding wire hole, and the binding fixing plate is provided with a second binding wire hole.

[0013] Optionally, the combined artificial sternal support for pectus excavatum correction further includes a guide plate, which is detachably connected to a first or third orthopedic plate for mounting and binding auxiliary plates.

[0014] Optionally, the unit panel is curved.

[0015] Optionally, the unit plate is a straight plate, and the two end faces of the unit plate are set as inclined surfaces.

[0016] A modular artificial sternal support for pectus excavatum correction includes a first orthopedic plate, a second orthopedic plate, and a third orthopedic plate. The first, second, and third orthopedic plates are snapped together using a bayonet design and fixed at the bayonet joints using countersunk screws.

[0017] Optionally, the second orthotic plate is provided with plug-in plates at both ends, and the first and third orthotic plates are provided with plug-in slots at the ends near the second orthotic plate, and the plug-in plates are plugged into the plug-in slots; the plug-in plates are provided with threaded holes that run through the top and bottom, and the first and third orthotic plates are provided with plug-in holes at the positions corresponding to the plug-in slots, and countersunk screws pass through the plug-in holes and are screwed into the threaded holes, and the diameter of the plug-in holes is larger than the diameter of the countersunk screw.

[0018] The beneficial effects of the present invention are as follows: The combined artificial sternal support for pectus excavatum correction of the present invention adopts a multi-segment structure, which assembles and connects the first orthopedic plate, the second orthopedic plate and the third orthopedic plate, and after assembly, it can form a plate with a certain curvature to correct the sternum. When it needs to be removed, it can be changed into a shape that is easy to remove by loosening the connection, avoiding the need to flip it over again and reducing the difficulty of removal.

[0019] Furthermore, the second orthotic plate is divided into multiple unit plates. Each unit plate, the first orthotic plate, and the third orthotic plate are connected in series by connecting wires. A tensioning device is provided on the first and second orthotic plates to tighten the connecting wires. When the stent is inserted into the patient's body, the connecting wires are loosened, making the artificial sternal stent of this invention a movable chain structure, facilitating insertion. After insertion, tightening the connecting wires causes the multiple unit plates to bend into a preset arc to lift the sternum. When removing the stent, the connecting wires are loosened again for easy removal. The insertion and removal of the stent are both very convenient, requiring no flipping of the stent, improving efficiency. The procedure is safe and reduces patient discomfort. Simultaneously, the tensioning device allows for adjustment of the connecting wires, enabling a novel stepped reduction method during orthodontic treatment. This involves gradually tightening the connecting wires at intervals, increasing the arch of the support structure. This avoids significant damage to the sternum and intercostal muscles caused by forcefully lifting the sternum into place all at once. This step-down reduction method is particularly beneficial for patients with severe pectus excavatum (Haller index greater than 3.5), greatly reducing sternal injury and patient discomfort during the orthodontic process, making correction safer and smoother. Furthermore, a flexible protective sleeve is fitted over the outer side of the unit plate, allowing for flexible insertion of the support structure. When removing the support, the combined first, second, and third orthodontic plates can be pulled out first, causing the flexible protective sleeve to deflate. This deflated sleeve is easier to separate from the tissue, preventing significant damage to muscles and tissues from forceful removal. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a combined artificial sternal support for pectus excavatum correction according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view at point C;

[0023] Figure 3 for Figure 1 The cross-sectional view of the guide panel is hidden.

[0024] Figure 4 for Figure 3 Enlarged view at point D;

[0025] Figure 5 for Figure 1 Exploded view (guide panel hidden);

[0026] Figure 6 for Figure 5 Enlarged view at point E in the middle;

[0027] Figure 7 for Figure 5 Enlarged view at point F;

[0028] Figure 8 for Figure 7 Enlarged view at point G;

[0029] Figure 9 This is an exploded view of the tensioning device;

[0030] Figure 10 This is a schematic diagram of a combined artificial sternal framework for pectus excavatum correction, provided in another embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of a combined artificial sternal support for pectus excavatum correction, provided in another embodiment of the present invention.

[0032] Figure 12 for Figure 11 Exploded view;

[0033] Figure 13 for Figure 12 Enlarged view of point A in the middle;

[0034] Figure 14 for Figure 12Enlarged view of section B in the middle.

[0035] In the picture:

[0036] 100. First orthopedic plate; 101. Insertion groove; 1011. Insertion hole; 110. Binding and fixing plate; 111. Second binding wire hole;

[0037] 200. Second orthopedic plate; 201. Insertion plate; 2011. Threaded hole; 210. Unit plate;

[0038] 300. Third orthopedic plate; 301. First mounting hole; 3011. Positioning groove; 302. Second mounting hole; 303. Threading hole; 304. Binding ring groove; 305. Connecting hole; 310. Binding auxiliary plate; 311. First binding wire hole; 312. Snap-fit ​​surface;

[0039] 400. Connecting steel wire;

[0040] 500. Wire tensioning device; 510. Adjusting knob; 511. Tilt spring; 512. Slotted groove; 520. Conical truncated cone; 521. Wire guide hole; 530. Connecting bolt; 540. Elastic element;

[0041] 600. Flexible protective sleeve; 601. Binding groove; 602. Tension seam;

[0042] 700, guide plate; 701, mounting holes;

[0043] 800, countersunk screw. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Reference Figures 1 to 14 This invention describes a combined artificial sternal support for pectus excavatum correction provided in an embodiment of the present invention.

[0046] Understandably, the current mainstream method for correcting pectus excavatum involves the Nuss procedure, in which a metal orthotic plate is placed inside the sternum. Before surgery, the surgeon pre-bends the metal orthotic plate into an arc shape to fit the patient's chest. During the procedure, a small incision is made on each side of the chest. The metal orthotic plate is inserted through one incision and exited through the other in a reverse manner (with the raised portion facing away from the sternum). The plate is then flipped so that its arched portion lifts the sternum, securing the plate in place, and the incision is sutured. After surgery, the metal orthotic plate typically remains in place for 2-3 years until the sternum stabilizes before removal. Removing the plate requires flipping it back to its reversed shape. However, because the plate is surrounded by tissue and has limited mobility, flipping it involves significant tearing of the muscles and surrounding tissues, making it very difficult, increasing surgical risks, and causing considerable pain for the patient.

[0047] To reduce surgical risks and shorten surgical time, the present invention proposes a modular artificial sternal framework for pectus excavatum correction (hereinafter referred to as artificial sternal framework). The framework adopts a multi-segment structure, and the segments can be assembled and connected to form a plate with a certain curvature after assembly to correct the sternum. When it needs to be removed, it can be changed into a shape that is easy to remove by loosening the connection, avoiding the need to flip it over again and reducing the difficulty of removal.

[0048] In one embodiment, reference is made to Figures 1 to 9 The artificial sternal support of the present invention includes a first orthotic plate 100, a second orthotic plate 200, and a third orthotic plate 300. The first orthotic plate 100 and the third orthotic plate 300 are respectively located at both ends of the second orthotic plate 200. The second orthotic plate 200 includes a plurality of unit plates 210. The plurality of unit plates 210, the first orthotic plate 100, and the third orthotic plate 300 are connected and assembled in series by connecting steel wires 400. Both the first orthotic plate 100 and the third orthotic plate 300 are provided with a tensioning device 500. The tensioning device 500 is configured to tighten the connecting steel wires 400 so that the plurality of unit plates 210 are bent into a preset shape, thereby lifting the sternum.

[0049] In this embodiment, the artificial sternal support is configured as a three-section structure including a first orthotic plate 100, a second orthotic plate 200, and a third orthotic plate 300. The second orthotic plate 200 is configured to be composed of multiple unit plates 210. The first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 are connected in series with connecting steel wires 400. Before the operation, an easily deformable and bendable template can be used to bend a suitable shape according to the patient's chest cavity contour, and then an appropriate number of unit plates 210 can be selected so that they can be assembled into the shape of the template.

[0050] When the artificial sternal framework is placed into the patient's body, the connecting wire 400 is in a loose state, so that the artificial sternal framework of the present invention has a movable chain structure, which is convenient for insertion into the patient's body without the need for reversed framework. After the framework is inserted into the human body and adjusted in position, the ends of the first orthotic plate 100 and the third orthotic plate 300 are tied to the patient's ribs to initially fix the framework. Then the connecting wire 400 is tightened, so that several unit plates 210 of the second orthotic plate 200 gradually bend into a preset shape and lift the sternum. When the framework needs to be removed, the connecting wire 400 is loosened again, and the framework can be pulled out directly from one end without flipping the framework. The removal and insertion of the framework are very convenient, improving the safety of the operation and reducing the patient's pain.

[0051] Furthermore, the artificial sternal framework of the present invention also includes a guide plate 700, one end of which is curved upward relative to the other end, and the opposite end of the curved end of the guide plate 700 can be connected to the end of the first orthotic plate 100 or the third orthotic plate 300 away from the second orthotic plate 200. When placing the framework in the patient's body, the guide plate 700 is first connected to the first orthotic plate 100 or the third orthotic plate 300, and then the guide plate 700 is inserted into the patient's body through one of the incisions. During the insertion of the guide plate 700, the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 enter the patient's body along the thoracic cavity passage opened by the guide plate 700. After installation, the guide plate 700 can be removed.

[0052] In the scheme of this embodiment, refer to Figure 4 , Figure 7 and Figure 9 The tensioning device 500 includes an adjusting knob 510, a cone 520, and a connecting bolt 530.

[0053] The first orthotic plate 100 and the second orthotic plate 200 are both provided with a first mounting hole 301 and a second mounting hole 302. The first mounting hole 301 and the second mounting hole 302 are coaxial and connected in the center. The adjustment knob 510 is rotatably set in the first mounting hole 301. The upper surface of the adjustment knob 510 is provided with a slot 512, which can be easily rotated with tools. The cone 520 is set in the second mounting hole 302 with its small end close to the adjustment knob 510. The two sides of the cone 520 are provided with wire holes 521 for connecting the steel wire 400 to pass through. The connecting bolt 530 passes through the cone 520 and is screwed to the adjustment knob 510, thereby connecting the cone 520 and the adjustment knob 510. An elastic element 540 is fitted on the adjusting knob 510. The elastic element 540 is preferably a spring. The elastic element 540 causes the adjusting knob 510 to tend to move away from the bottom of the first mounting hole 301. As a result, in the initial state, the wire hole 521 on the cone 520 is misaligned with the wire hole 303 on the first straightening plate 100 and the third straightening plate 300 for threading the connecting steel wire 400 in the vertical direction.

[0054] An inclined spring piece 511 is provided on the end face of the adjusting knob 510 opposite to the bottom wall of the first mounting hole 301. The inclined spring piece 511 is configured to tilt backward and downward in the direction of rotation of the adjusting knob 510 tightening the connecting wire 400. A positioning groove 3011 is provided on the bottom wall of the first mounting hole 301. The positioning groove 3011 allows the inclined spring piece 511 to be inserted into it, and cooperates with the inclined spring piece 511 to prevent the adjusting knob 510 from releasing the connecting wire 400. Specifically, the positioning groove 3011 is a strip groove that is adapted to the thickness and width of the inclined spring piece 511. When the adjusting knob 510 is rotated, it drives the inclined spring piece 511 to slide into the positioning groove 3011 in a backward posture, and can slide out of the positioning groove 3011 when the adjusting knob 510 continues to rotate. However, after the inclined spring piece 511 enters the positioning groove 3011, it cooperates with the positioning groove 3011 to prevent the adjusting knob 510 from reversing.

[0055] Furthermore, to facilitate threading, the extension direction of the positioning groove 3011 is parallel to the direction of the threading hole 303 on the first orthopedic plate 100 and the third orthopedic plate 300. When the cone 520 is connected to the adjusting knob 510, the extension direction of the thread hole 521 on the cone 520 is aligned with the direction of the inclined spring 511. Thus, when the adjusting knob 510 is rotated, if the inclined spring 511 is felt to be inserted into the positioning groove 3011, it indicates that the thread hole 521 on the cone 520 and the threading hole 303 on the first orthopedic plate 100 and the third orthopedic plate 300 are aligned in the extension direction. When parallel, press down on the adjustment knob 510 to align the wire hole 521 on the cone 520 with the wire hole 303 on the first straightening plate 100 and the third straightening plate 300. This allows the connecting wire 400 to pass smoothly through the cone 520 and exit from the first straightening plate 100 and the third straightening plate 300. After the wire is threaded, release the adjustment knob 510. The adjustment knob 510 springs up under the action of the elastic element 540, and the wire hole 521 on the cone 520 is misaligned with the wire hole 303 on the first straightening plate 100 and the third straightening plate 300, thereby pre-fixing the position of the connecting wire 400.

[0056] Then, the guide plate 700 is used to pull the assembly of the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 to the inside of the sternum. The guide plate 700 is then removed and the first orthotic plate 100 and the third orthotic plate 300 are fixed to the ribs. It is understood that in this embodiment, the end of the connecting wire 400 that passes through the first orthotic plate 100 and the third orthotic plate 300 can be reserved with a certain length. That is, the length of the connecting wire 400 can be prepared to be relatively long. When fixing the first orthotic plate 100 and the third orthotic plate 300, this part of the connecting wire 400 can be used to bind the first orthotic plate 100 and the third orthotic plate 300 to the ribs.

[0057] Next, rotate the adjustment knob 510, which drives the cone 520 to rotate. The connecting wire 400 is wound around the cone 520 and gradually tightened. The unit plate 210 of the second orthotic plate 200 bends into a predetermined shape as the connecting wire 400 tightens. Since the connecting wire 400 is wound around the conical surface of the cone 520, the tension of the connecting wire 400 causes the adjustment knob 510 to compress the elastic element 540 and move downward. After the adjustment knob 510 moves down a certain distance, as the adjustment knob 510 rotates, the tilting spring 511 can be pressed into the positioning groove 3011, automatically locking the adjustment knob 510 and preventing the adjustment knob 510 from reversing. After installation, suture the incision.

[0058] When the patient's sternal orthopedic correction is stable and the support needs to be removed, the original incisions on both sides of the chest are reopened, the adjustment knob 510 is located and pushed upwards, so that the tilting spring 511 is disengaged from the positioning groove 3011. The adjustment knob 510 is rotated in the opposite direction, the connecting wire 400 is loosened, and the combination of the first orthopedic plate 100, the second orthopedic plate 200 and the third orthopedic plate 300 becomes a movable chain structure again, which is convenient for removal.

[0059] Meanwhile, since this embodiment uses a connecting steel wire 400 for tensioning, and the tensioning device can adjust the tension of the connecting steel wire 400, a new step-down reduction method can be used during correction, avoiding significant damage to the sternum and intercostal muscles caused by lifting the sternum into place all at once. In particular, for patients with severe pectus excavatum with a Haller index greater than 3.5, the new step-down reduction method can greatly reduce the pain of patients during the correction process. Specifically, the doctor sets the patient's recovery gradient based on a professional assessment. Taking three gradients as an example, during the surgery, the connecting wire 400 can be tightened so that the combination of the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 arches to the first gradient, lifting the patient's sternum to the parameters of the first gradient. After the preset recovery time, the wound is periodically incised, and the adjustment knob 510 is rotated again to tighten the connecting wire 400, so that the combination of the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 arches to the second gradient. Then, the second gradient is adjusted to the third gradient until the patient's sternum correction is completed, and the brace is removed. Understandably, to allow sufficient time for the wound to heal, one can choose to utilize the incision left during surgery, or make an additional small incision above the adjustment knob 510, with multiple incisions made in turn. Of course, in general, sternal repositioning is a slow process, with each level of correction taking approximately one year. The time interval for adjusting the tension gradient of the connecting wire 400 is also relatively long, not too frequent, and the number of incisions is not too large, thus causing less harm to the patient.

[0060] In the scheme of this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, a flexible protective sleeve 600 is fitted over the outer side of the unit plate 210. Both ends of the flexible protective sleeve 600 can be fixed to the first orthotic plate 100 and the third orthotic plate 300 near the second orthotic plate 200. By using the flexible protective sleeve 600, the stent can be inserted flexibly, while preventing the unit plate 210 from scratching the tissue. Furthermore, when removing the stent, the combination of the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 can be pulled out first, leaving the flexible protective sleeve 600 temporarily inside the body. After the combination of the first orthotic plate 100, the second orthotic plate 200, and the third orthotic plate 300 is pulled out, the flexible protective sleeve 600 deflates, making it easier to separate from adhered tissues, avoiding excessive tearing of tissues due to rigid removal, and reducing patient discomfort.

[0061] Furthermore, refer to Figure 2 and Figure 6 As shown, the flexible protective sleeve 600 has binding grooves 601 at both ends, and the first orthotic plate 100 and the third orthotic plate 300 have binding ring grooves 304. The binding grooves 601 and binding ring grooves 304 correspond to each other, which facilitates binding and fixing the flexible protective sleeve 600 to the first orthotic plate 100 and the second orthotic plate 200.

[0062] Furthermore, refer to Figure 2 The flexible protective sleeve 600 has a tension slit 602 at its end, which intersects with the binding grooves 601 on both sides. The tension slit 602 divides the end of the flexible protective sleeve 600 into upper and lower parts. The tension slit 602 facilitates the fitting of the flexible protective sleeve 600 and makes the binding of the flexible protective sleeve 600 with the first orthotic plate 100 and the second orthotic plate 200 more reliable.

[0063] In the scheme of this embodiment, refer to Figure 2 and Figure 7As shown, a binding auxiliary plate 310 is provided at the end of the third orthotic plate 300 away from the second orthotic plate 200. The binding auxiliary plate 310 is detachably connected to the third orthotic plate 300. A binding fixing plate 110 is provided at the end of the first orthotic plate 100 away from the second orthotic plate 200. The binding fixing plate 110 is fixedly connected to the first orthotic plate 100. Preferably, the binding fixing plate 110 and the first orthotic plate 100 can be integrally formed. When the artificial sternal framework of the present invention is inserted into the patient's body, the binding auxiliary plate 310 is not installed, so that the artificial sternal framework can be smoothly inserted into the patient's body. After the artificial sternal framework smoothly lifts the sternum and is adjusted appropriately, the binding auxiliary plate 310 is installed. The binding auxiliary plate 310 has a first binding wire hole 311, and the binding fixing plate 110 has a second binding wire hole 111. By passing binding wires through the first binding wire hole 311 and the second binding wire hole 111, the ends of the first orthotic plate 100 and the third orthotic plate 300 are fixed to the ribs. In this embodiment, the portion of the connecting wire 400 extending out of the first orthotic plate 100 and the third orthotic plate 300 can serve as a binding wire.

[0064] In the scheme of this embodiment, refer to Figure 2 The upper surface of the binding auxiliary plate 310 is provided with a snap-fit ​​groove, and snap-fit ​​surfaces 312 are provided on the left and right sides of the snap-fit ​​groove. At the position where the binding auxiliary plate 310 is installed on the third orthopedic plate 300, there is a mating surface adapted to the snap-fit ​​surface 312. The snap-fit ​​surface 312 and the mating surface engage. Specifically, the snap-fit ​​surface 312 and the mating surface can be set to a wavy or zigzag shape. By setting the snap-fit ​​surface 312 and the mating surface to a wavy or zigzag engagement, the convenience and reliability of the engagement can be improved.

[0065] In the scheme of this embodiment, refer to Figure 1 and Figure 2 The third orthotic plate 300 has a connecting hole 305 at the end furthest from the second orthotic plate 200, and the guide plate 700 has a fixing hole 701 at the opposite end of the warped end. When inserting the artificial sternal framework of the present invention into the patient's body, the binding auxiliary plate 310 is first removed. The guide plate 700 is connected to the third orthotic plate 300 through the binding of the connecting hole 305 and the fixing hole 701, which reduces the incision size and facilitates the insertion of the artificial sternal framework of the present invention. After insertion, the guide plate 700 is removed and the binding auxiliary plate 310 is installed. At this time, the connecting hole 305 at the end of the third orthotic plate 300 can be used to insert binding wires to help fix the third orthotic plate 300.

[0066] Naturally, the binding and fixing plate 110 can also be installed on the third orthopedic plate 300, and the binding auxiliary plate 310 can be installed on the first orthopedic plate 100. Since the binding auxiliary plate 310 can be detached, the guide plate 700 is connected to the first orthopedic plate 100 at this time.

[0067] In the scheme of this embodiment, refer to Figure 5 The unit plate 210 is arc-shaped. When comparing with the template, selecting a unit plate 210 with a suitable arc can assemble it into a shape similar to the template. During assembly, the arc of the selected unit plate 210 can be a smooth arc at the maximum gradient of the correction, making the correction fit the thoracic cavity better. In this embodiment, preferably, three unit plates 210 are selected.

[0068] Reference Figure 10 The present invention also proposes another embodiment, which is similar to the foregoing embodiment. Figures 1 to 9 The difference in the illustrated embodiment is that the unit plate 210 is a straight plate, and the two ends of the unit plate 210 are set as inclined surfaces. The inclination degree of the end faces of different unit plates 210 is different, which facilitates the assembly of the unit plates 210. When comparing with the template, selecting an appropriate inclination angle and an appropriate number of unit plates 210 can assemble them into a shape that approximates the template. Compared with the curved unit plate 210, the straight-plate style unit plate 210 is more versatile and easier to manufacture and process, which can greatly improve the applicability and ease of use of the device. In this embodiment, in order to make the assembled unit plates 210 as smooth as possible, a relatively larger number of unit plates 210 are used compared with the embodiment where the unit plates 210 are curved (the more the number, the closer to a smooth arc). This embodiment uses five unit plates 210. It is understood that even if the arc formed after the unit plates 210 are assembled has a certain bending point, because the unit plate 210 is covered with a flexible protective sleeve 600, the bending point will not cause damage to the patient's muscle tissue.

[0069] Reference Figures 11 to 14 The present invention also proposes other embodiments. In this embodiment, the combined artificial sternal support for pectus excavatum correction of the present invention includes a first orthopedic plate 100, a second orthopedic plate 200 and a third orthopedic plate 300. The first orthopedic plate 100, the second orthopedic plate 200 and the third orthopedic plate 300 are connected by a bayonet mode and the bayonet is fixed by a countersunk screw 800.

[0070] Specifically, the second orthotic plate 200 has insertion plates 201 at both ends. The first orthotic plate 100 and the third orthotic plate 300 are each provided with insertion slots 101 that are adapted to the insertion plates 201 at the ends near the second orthotic plate 200. The insertion plates 201 are inserted into the insertion slots 101. The insertion plates 201 are provided with threaded holes 2011 that are through the top and bottom. The first orthotic plate 100 and the third orthotic plate 300 are provided with insertion holes 1011 at the positions corresponding to the insertion slots 101. The countersunk screws 800 pass through the insertion holes 1011 and are screwed into the threaded holes 2011, thereby connecting the first orthotic plate 100, the second orthotic plate 200 and the third orthotic plate 300. The diameter of the insertion hole 1011 is larger than the diameter of the countersunk screw 800, so that the connection can have a certain amount of movement after the countersunk screws 800 are loosened. When it is necessary to remove the artificial sternal framework provided in this embodiment from the patient's body, first disconnect the connection between the first orthotic plate 100 or the third orthotic plate 300 and the second orthotic plate 200, remove the first orthotic plate 100 or the third orthotic plate 300, then loosen the connection between the second orthotic plate 200 and the third orthotic plate 300 or the first orthotic plate 100, forming a movable connection between the second orthotic plate 200 and the third orthotic plate 300 or the first orthotic plate 100, pull the third orthotic plate 300 or the first orthotic plate 100, and remove the third orthotic plate 300 or the first orthotic plate 100 together with the second orthotic plate 200. There is no need to flip the artificial sternal framework, and during the removal process, the shape of the second orthotic plate 200 is almost straight and similar to the shape of the thoracic cage. During the pulling process, it is parallel to the thoracic cage, which greatly reduces the risk of damage to other tissues and organs.

[0071] In the solution of this embodiment, with Figures 1 to 10 The provided embodiment is the same. A binding auxiliary plate 310 is connected to the end of the third orthotic plate 300 away from the second orthotic plate 200. The binding auxiliary plate 310 and the third orthotic plate 300 are detachable. Specifically, the middle of the binding auxiliary plate 310 is connected to the third orthotic plate 300 via a countersunk screw 800. First binding wire holes 311 are provided on both sides of the binding auxiliary plate 310. Binding wires are threaded through the first binding wire holes 311 to bind and fix the third orthotic plate 300 to the ribs. A binding fixing plate 110 is provided at the end of the first orthotic plate 100 away from the second orthotic plate 200. The binding fixing plate 110 is fixedly connected to the first orthotic plate 100. Preferably, the binding fixing plate 110 and the first orthotic plate 100 are integrally formed. The binding fixing plate 110 is provided with second binding wire holes 111. Binding wires are threaded through the second binding wire holes 111 to bind and fix the first orthotic plate 100 to the ribs.

[0072] It is understandable that the solution provided in this embodiment is relatively simple, easy to manufacture and process, and low in cost. For patients with mild pectus excavatum with a Haller index of less than 3.2, or patients with moderate pectus excavatum with a Haller index of greater than 3.2 and less than 3.5, the degree of sternal depression is relatively mild, and the stent is relatively easy to place in the patient's body. When the stent lifts the sternum, the sternum can be moderately deformed to achieve the correction goal without causing significant damage to the sternum, intercostal muscles and pleural cavity. The patient experiences less postoperative pain, and the one-time correction is convenient and ideal. Therefore, the solution provided in this embodiment can be selected.

[0073] The various embodiments provided by this invention can be rationally selected and combined according to actual clinical conditions. The above descriptions are merely preferred embodiments of this invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A modular artificial sternal framework for correcting pectus excavatum, characterized in that, The device includes a first orthotic plate, a second orthotic plate, and a third orthotic plate. The first and third orthotic plates are located at opposite ends of the second orthotic plate. The second orthotic plate comprises several unit plates. These unit plates, the first orthotic plate, and the third orthotic plate are connected by connecting wires and assembled to form an arc-shaped plate that conforms to the contour of the patient's chest cavity. When the artificial sternal support is placed into and removed from the patient's body, the connecting wires are in a relaxed state. Both the first and third orthotic plates are equipped with a tensioning device, which is configured to tighten the connecting wires so that the unit plates are bent into a preset shape, thereby lifting the sternum. The tensioning device can also adjust the tension of the connecting wires. A step-like repositioning orthotic method is used during orthosis. The tensioning device includes an adjustment knob, a cone, and a connecting bolt; The first and second orthopedic plates are provided with a first mounting hole and a second mounting hole, which are coaxial and connected in the center. The adjustment knob is rotated in the first mounting hole, and the cone is set in the second mounting hole with its small end close to the adjustment knob. The two sides of the cone are provided with wire-passing holes for connecting steel wires to pass through. The connecting bolt passes through the cone and is screwed to the adjustment knob. An elastic element is sleeved on the adjustment knob, which makes the adjustment knob tend to move away from the bottom of the first mounting hole. An inclined spring is provided on the end face of the adjustment knob opposite to the bottom wall of the first mounting hole. The inclined spring is configured to tilt backward and downward in the direction of rotation of the adjustment knob to tighten the connecting steel wire. A positioning groove is provided on the bottom wall of the first mounting hole. The positioning groove allows the inclined spring to be inserted into it and cooperates with the inclined spring to prevent the adjustment knob from releasing the connecting steel wire.

2. The combined artificial sternal framework for pectus excavatum correction according to claim 1, characterized in that, The outer side of the unit plate is fitted with a flexible protective sleeve, and both ends of the flexible protective sleeve can be fixed to the first orthopedic plate and the end of the third orthopedic plate that is close to the second orthopedic plate.

3. A combined artificial sternal framework for pectus excavatum correction according to claim 1 or 2, characterized in that, One of the ends of the third orthotic plate and the first orthotic plate away from the second orthotic plate is provided with a binding and fixing plate, and the other is provided with a binding auxiliary plate, which can be detached.

4. A combined artificial sternal framework for pectus excavatum correction according to claim 3, characterized in that, The binding auxiliary plate is provided with a first binding wire hole, and the binding fixing plate is provided with a second binding wire hole.

5. A combined artificial sternal framework for pectus excavatum correction according to claim 3, characterized in that, The combined artificial sternal support for pectus excavatum correction also includes a guide plate, which is detachably connected to a first or third orthopedic plate for mounting and binding auxiliary plates.

6. A combined artificial sternal framework for pectus excavatum correction according to claim 1, characterized in that, The unit panel is arc-shaped.

7. A combined artificial sternal framework for pectus excavatum correction according to claim 1, characterized in that, The unit panel is a straight panel, and both ends of the unit panel are set as inclined surfaces.

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