CN113712656B

CN113712656B - Sternum fixation system

Info

Publication number: CN113712656B
Application number: CN202111067155.3A
Authority: CN
Inventors: 罗万川; 王春莹; 王强
Original assignee: Shanghai Huodian Medical Equipment Co ltd
Current assignee: Shanghai Huodian Medical Equipment Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2023-08-08
Anticipated expiration: 2041-09-13
Also published as: CN113712656A

Abstract

The invention relates to the technical field of medical appliances. The sternum fixing system comprises a guide hook and a binding belt, wherein the guide hook comprises a guide part, a bending and turning part and a connecting part which are sequentially connected; the guide part is a tip part, and the thickness and the width of the tip part are gradually reduced from the position adjacent to the bending turning part to the position away from the bending turning part; the bending steering part is bent in an arc shape; the connecting portion is used for being connected with the ribbon. This patent is through optimizing sternal fixation system, through improvement guide hook's structure and guide hook's surface coating be used for preventing nickel ion and reduce the coating of friction, improved its guide through effect to the ribbon, give the ribbon and pass the musculature of chest and provide sufficient space. Because the bending steering part is additionally arranged between the guide part and the connecting part, the passing channel is enlarged and the resistance of the later-stage binding belt passing is reduced in the process of guiding the hook to pass through the musculature of the chest.

Description

Sternum fixation system

Technical Field

The invention relates to the technical field of medical appliances, in particular to a sternum fixing system.

Background

The surgery of chest and heart is about 25 ten thousand cases/year, and the surgery of lung tumor is about 20 ten thousand cases/year. At present, most of heart great vessel surgery and lung tumor surgery at home and abroad adopt median sternal cleavage, namely, the operation is carried out after the sternum is split longitudinally, and after the operation is finished, the left and right sternums split longitudinally are often required to be folded, then sutured and re-fixed. The conventional method is to bundle with wires or other wires between the first to fourth rib spaces and the fifth rib space. However, clinical practice for many years has found that, due to the thin wire, the sternum is easily torn by using a steel wire or a wire fixing mode after operation, so that non-operative injuries such as sternum cutting and the like are caused, and the sternum is opened, especially for the elderly and osteoporosis patients.

The sternal opening is very common in the later period of the chest opening operation, and the reasons are various, so that patients with coronary heart disease bypass are older, osteoporosis is caused, and the postoperative sternal opening is caused; patients with valve operation have long preoperative course, poor constitution, complicated cardiac insufficiency, liver and kidney insufficiency, hypoalbuminemia, and sternal healing; the aortic surgery time and the extracorporeal circulation time are long, so that the postoperative infection chance is increased, and the sternum is caused to be opened; long-term smoking before operation, which causes postoperative cough and lung infection, and affects the stability of the fixed sternum; diabetes mellitus is combined, the infection chance is increased, and the healing of breastbone and tissues is affected; there are also sternal times due to the suture technique of the physician, the location of the fixation of the wire suture, tightness, and even more.

Sternal infection is a serious complication of cardiac surgery, one of the main causes of failure of cardiac surgery, and a difficult problem that plagues cardiac surgeons. The treatment of sternal infection is very troublesome, especially the serious patients with sternal Duoduo, large-area wound surfaces accompanied with mediastinal infection are much converted into chronic persistent disunion. One of the reasons for this phenomenon is the high incidence: the doctor emphasizes the economical simplicity of traditional steel wire chest closing, which is applicable to most patients, but has the problem that the postoperative sternum is opened for special patients, which increases the economic burden and the operation risk of the patients; the second step is: inadequate preventive awareness, without consideration of patient specifics, can ultimately lead to the onset of sternal pyridosis by general methods and measures.

In order to change the high incidence of the complications, in many current preventive measures, the medical instrument is adopted to close the chest, so that the preventive effect on the sternal pyridoxine is obvious, and the preventive measure is more effective in preventing postoperative infection of the sternum. Second, such procedures must be followed up and followed up at a later stage, and the use of Magnetic Resonance Imaging (MRI) is unavoidable, so that nuclear magnetic compatibility of the implant material is the best solution to the contradiction.

In view of the above, there is a strong need in the clinic for a new and safe and effective "sternal fixation system" that is compatible with Magnetic Resonance Imaging (MRI), and that can reduce postoperative complications in patients, without affecting subsequent diagnosis and treatment of patients.

The patent with publication number CN203524752U discloses a binding band locking and fixing device for orthopaedics, which consists of a strip-shaped toothed binding band, a stainless steel hook and a lock catch; the long-strip-shaped toothed binding band is provided with tooth grooves; the stainless steel hook is provided with a pointed end; the center of hasp sets up the square lockhole of upper and lower intercommunication, and inner wall one side of lockhole sets up the elasticity lock tooth, ties up the bandage and can crookedly stretch into in the lockhole, and the hasp allows to tie up the bandage and positively slide and interlock reverse locking lock each other, and can not withdraw from.

The disadvantage of the above patent is that the stainless steel hooks are simply curved and have equal thickness, which is inconvenient for guiding the tie through. Stainless steel hooks can precipitate nickel ions when contacting blood or body fluid of a human body, and cause allergic reaction of a patient. The stainless steel hook has a pair of concave grooves at the connection position with the binding band, and the uneven structure can cause damage to tissues when penetrating through human tissues. The strapping band has grooves on the side that contacts the sternum or musculature and gaps between the strapping band and the sternum or musculature, which can cause tissue infection and be detrimental to post-operative healing. The single strapping band has poor positioning effect and is easy to shift.

Disclosure of Invention

Aiming at the problems existing in the prior art, the invention provides a novel safe and effective sternum fixing system which can be compatible with Magnetic Resonance Imaging (MRI), enables sternum to be involuted in the safest mode and to be healed and grown continuously, can reduce postoperative complications of patients, and can not influence subsequent diagnosis and treatment of the patients, so that the technical problems of poor fixing effect, easiness in shifting, easiness in causing postoperative infection and the like of the existing fixing system are solved.

In order to achieve the above object, the present invention provides a sternum fixing system comprising a guide hook and a tie, wherein the guide hook comprises a guide part, a bending and turning part and a connecting part which are sequentially connected;

the guide part is a tip part, and the thickness and the width of the tip part are gradually reduced from the position close to the bending turning part to the position far away from the bending turning part;

the bending steering part is bent in an arc shape;

the connecting portion is used for being connected with the ribbon.

This patent has improved its guide through effect to the ribbon through optimizing sternal fixation system, through the structure of improvement guide crotch, gives the ribbon and passes the musculature of chest and provide sufficient space. Because the bending steering part is additionally arranged between the guide part and the connecting part, the passing channel is enlarged and the resistance of the later-stage binding belt passing is reduced in the process of guiding the hook to pass through the musculature of the chest.

In the design of traditional sternum fixing system, in order to ensure the fluency of passing action, a metal hook form with uniform curvature is adopted, and the novel sternum fixing system is turned in a multi-section form, so that the resistance is not increased, but the passing channel is enlarged, and the resistance of the ribbon passing can be reduced.

Further preferably, the guide hook may be made of a medical material such as nickel-titanium alloy or stainless steel.

Further preferably, the outer surface of the guide hook is coated with a coating for preventing nickel ions from precipitating and reducing friction. For example, the outer surface of the guide hook is covered with at least one of an oxide layer, a nano-coating, a parylene coating, a polytetrafluoroethylene coating, a super-slip coating, and a polymer coating. The coating can prevent nickel ions from precipitating, reduce the allergic reaction incidence rate of patients and improve the biocompatibility and corrosion resistance of the patients. Meanwhile, the coating can reduce the friction force between the guiding hooks and the muscle tissues, so that the guiding hooks can pass through the muscle tissues more smoothly.

The guiding hooks are in contact with blood or body fluid, and the liquid contains chloride ions which have strong corrosiveness to nickel-titanium alloy and stainless steel, so that nickel ions can be separated out, and part of patients are allergic and even poisoned due to the nickel ions because the nickel ions are toxic, so that endothelialization of cells at defect positions of the patients is not facilitated, and rehabilitation and long-term physical health of the patients, especially neonates, are also not facilitated.

Further preferably, the coating can be applied by high temperature oxidation, chemical oxidation, plasma spraying, magnetron sputtering, chemical surface heat treatment, surface spraying, dip coating, laser cladding, electrochemical deposition, sol gel method, vapor deposition.

Further preferably, the side of the guiding hook connecting ribbon is provided with a pattern structure; the pattern structure is provided with at least one hole, and the pattern structure is provided with holes in a single row or in double rows or multiple rows; the shape of the hole is any one of a circle, an ellipse, a square, a rectangle, a triangle, a quadrangle, a trapezoid, a star, a diamond, a heart, a waist and a polygon; the hole is a blind hole which does not penetrate through the connecting part of the guide hook or a through hole which penetrates through the connecting part of the guide hook. Such a design is convenient for be connected with the ribbon cooperation.

Further preferably, the connecting portion includes a first end portion connected to the bending turning portion and a second end portion connected to the tie, the first end portion being connected to the second end portion, and a cross-sectional area of the first end portion being greater than or equal to a cross-sectional area of the second end portion;

the tie is injection molded at the second end. The connecting portion is connected with the ribbon smoothly like this, and the chest musculature of crossing of ribbon of being convenient for, ribbon and connecting portion's connection are more stable and firm.

Further preferably, the binding belt comprises binding belts and a lock catch which are sequentially connected, and the binding belts are fixedly connected with the connecting part;

one side (such as the side which is not contacted with the sternum) of the binding belt is provided with grooves for clamping the lock catches, and the grooves are provided with at least two grooves along the length direction of the binding belt;

the other side of the strapping (such as the side that contacts the sternum) is a smooth surface.

Friction and resistance to penetration into muscle tissue can be reduced. The ribbon has enough friction and restraining force and can firmly and fixedly connect the corresponding sternum together, thereby facilitating involution and growth of bone tissue and muscle tissue.

Further preferably, one side surface of the binding belt, which contacts with the sternum, is taken as a contact surface;

the lock catch of the ribbon is provided with a lock catch hole for guiding the binding ribbon of the ribbon to pass through, and the distance between one side of the lock catch hole far away from the contact surface and the contact surface increases gradually along the length direction from the lock catch to the binding ribbon fixedly connected;

the lock catch is provided with a lock catch hole for clamping the binding belt.

The band is prevented from forming a gap with the sternum or muscle tissue, thereby preventing infection in the patient.

It is further preferable that the two sides of the sternum are connected with the rib to form the left side and the right side of the sternum, and the lock catch of the binding belt is used for being fixed on the left side or the right side of the sternum.

This fixation pattern and position facilitates rapid growth of muscle tissue on the surface of the sternum, reducing healing time.

Further preferably, the ribbon is made of high polymer materials, such as polyether-ether-ketone, has good physical and mechanical properties and biocompatibility, and meets the requirements of implantation medical instrument standards.

The ribbon is I-shaped, crossed or banded. The bands with different shapes are applicable to different sternum positions, the I-shaped bands are applicable to be fixed on the sternum connected with the ribs, the cross bands are applicable to be fixed on the sternum handles or the sternum connected with the ribs, and the band bands are applicable to be placed in the gap between two rib bones. The ribbon is I-shaped or cross-shaped, so that the ribbon is not easy to shift after operation. The ribbon is in a ribbon shape, and the ribbon is not stable like an I shape and a cross shape, but is simpler to operate. These designs allow the sternal fixation system to be applied to the surface of the sternum in a seamless fashion, avoiding the formation of false cavities and resulting infections of the sternum.

Further preferably, the binding belt is in an I shape, and comprises at least two binding belts arranged side by side, and the adjacent binding belts are connected through a connecting structure;

one end of the binding belt is fixed with one guide hook;

the other end of the binding belt is fixed with a lock catch.

The interval between two strapping tapes arranged side by side of the I-shaped strapping tape is just the width of the corresponding rib, so that the strapping tape is not easy to shift after operation, and the strapping tape is fixed on the surface of the sternum more firmly.

Further preferably, the binding belt is in a cross shape, the binding belt comprises at least two binding belts, and the guide hooks are connected to the same sides of the binding belts;

the binding belts are mutually hinged or fixedly connected in a crossed mode.

The hinging type can rotate the two binding belts to a proper position according to the shape of the sternum of a patient and then bind and fix the two binding belts, so that the application range is wider; the cross-shaped fixed connection needs to be selected according to the shape and the size of the sternum of a patient, and the application range is relatively narrow, but the fixation is firmer.

The using method comprises the following steps:

in the operation process, the guide hook is firstly passed through the muscle tissue on one side of the sternum, then passed through the muscle tissue on the other side of the sternum, cut off at the joint of the guide hook and the ribbon, after the sternum is aligned and spliced, the two sides of the sternum are clamped by the instrument, so that the two sides of the sternum are completely combined, and then the ribbon is firmly locked and connected together on the side face of the sternum.

The beneficial effects are that:

the novel sternum fixing system made of the polymer material can enable the sternum separated from left and right in operation to be overlapped in three dimensions of up and down, left and right and front and back, ensure that the damaged sternum is combined in a safest mode, and can heal and grow quickly and accurately, and the binding belt can be firmly fixed on the surface of the sternum without displacement.

Drawings

FIG. 1 is a schematic view showing a partial structure of an embodiment 1 of the present invention;

FIG. 2 is a schematic view showing a structure of a guide hook according to embodiment 1 of the present invention;

FIG. 3 is a schematic view showing another structure of a guide hook according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing another structure of a guide hook according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of a band according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of another construction of a tie according to embodiment 1 of the present invention;

FIG. 7 is a schematic view of a structure of the band according to embodiment 1 of the present invention after closing;

fig. 8 is a partial cross-sectional view of the structure of fig. 7 in accordance with the present invention.

Wherein: 1 is a guiding hook, 2 is a binding belt, 11 is a guiding part, 12 is a bending and steering part, 13 is a connecting part, 21 is a binding belt, 22 is a lock catch, 23 is a lock catch hole, 24 is a connecting structure, 25 is a groove, 131 is a first end part, 132 is a second end part, and 133 is a pattern structure.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

1-8, a sternum fixing system includes a guide hook 1 made of a metal material and a strap 2, the guide hook 1 including a guide portion 11, a bending turn portion 12, and a connecting portion 13 connected in sequence; the guide 11 is a tip portion, and the thickness and width of the tip portion decrease from adjacent to the bending turn 12 to away from the bending turn 12; the bending steering part is bent in an arc shape; the connecting portion 13 is connected to the band 2. This patent improves its guiding through effect to the ribbon 2 by optimizing the sternal fixation system, by improving the structure of the guiding hook 1, giving the ribbon 2 sufficient space to pass through the musculature of the chest. Because the bending steering part 12 is additionally arranged between the guide part 11 and the connecting part 13, the passing channel is enlarged and the passing resistance of the later-stage binding belt 2 is reduced in the process of guiding the hook 1 to pass through the musculature of the chest.

The included angle between the length direction of the guiding part and the length direction of the connecting part is an acute angle.

In the design of traditional sternum fixing system, in order to ensure the fluency of passing action, a metal hook form with uniform curvature is adopted, and the novel sternum fixing system is turned in a multi-section form, so that not only is the resistance not increased, but also the passing channel is enlarged, and the passing resistance of the binding belt 2 can be reduced.

The guide hook 1 may be made of medical materials such as nickel-titanium alloy or stainless steel. The outer surface of the guide hook 1 is coated with a coating for preventing nickel ions from precipitating and reducing friction. For example, the outer surface of the guide hook 1 is covered with at least one of an oxide layer, a nano-coating, a parylene coating, a polytetrafluoroethylene coating, an ultra-slip coating, and a polymer coating. The outer surface of the guide hook 1 is covered with an oxide layer, and the guide hook 1 is formed by heating the material of the guide hook 1 at high temperature. The coating can prevent nickel ions from precipitating, reduce the allergic reaction incidence rate of patients and improve the biocompatibility and corrosion resistance of the patients. Meanwhile, the coating can reduce the friction force between the guiding hooks and the muscle tissues, so that the guiding hooks can pass through the muscle tissues more smoothly. The guiding hook 1 is in contact with blood or body fluid in a human body, and the liquid contains chloride ions which have strong corrosiveness to nickel-titanium alloy and stainless steel, so that nickel ions can be separated out, and part of patients can be allergic and even poisoned due to the nickel ions because of the toxicity of the nickel ions, so that endothelialization of cells at defect positions of the patients is not facilitated, and rehabilitation and long-term physical health of the patients are also not facilitated, especially neonates. The coating can be coated by adopting a high-temperature oxidation method, a chemical oxidation method, a plasma spraying method, a magnetron sputtering method, a chemical surface heat treatment method, a surface spraying method, a dip coating method, a laser cladding method, an electrochemical deposition method, a sol-gel method and a vapor deposition method.

Referring to fig. 2, 3 and 4, the guide hook 1 is provided with a pattern structure 133 on the side of the connection band 2; the pattern structure 133 is provided with at least one, single or double or multiple rows of holes; the shape of the hole is any one of a circle, an ellipse, a square, a rectangle, a triangle, a quadrangle, a trapezoid, a star, a diamond, a heart, a waist and a polygon; the hole is a blind hole that does not penetrate the connecting portion 13 of the guide hook 1 or a through hole that penetrates the connecting portion of the guide hook. Such a design facilitates the mating connection with the tie 2. Referring to fig. 2, the aperture is shown as an elongated kidney-shaped aperture. Referring to fig. 3, the holes are at least three kidney-shaped holes arranged side by side along the length direction of the connection portion 13, and the length direction of the kidney-shaped holes is the width direction of the connection portion 13. Referring to fig. 4, there is shown a circular hole with a double row arrangement of holes.

The connecting part 13 comprises a first end 131 connected with the bending turning part 12 and a second end 132 connected with the ribbon 2, wherein the cross section area of the first end is larger than or equal to that of the second end; the tie 2 is injection moulded at the second end of the connecting portion 13. The connection portion 13 and the band 2 are connected smoothly in such a way that the band 2 passes through the chest musculature, and the connection of the band 2 and the connection portion 13 is more stable and firm.

The binding belt 2 comprises binding belts 21 and a lock catch 22 which are sequentially connected, and the binding belts 21 are fixedly connected with the connecting part 13; one side (such as the side not contacted with the sternum) of the binding belt 21 is provided with grooves 25 for clamping the lock catches 22, and the grooves 25 are provided with at least two along the length direction of the binding belt 21; the other side of the binding band 21 (such as the side in contact with the sternum) is a smooth surface. Friction and resistance to penetration into muscle tissue can be reduced. The band 2 has sufficient friction and restraining force to firmly and fixedly connect the corresponding sternum together, thereby facilitating involutory growth of bone tissue and muscle tissue.

Referring to fig. 7 and 8, a side surface of the strap 2 contacting the sternum is taken as a contact surface; the lock catch 22 of the binding belt 2 is provided with a lock catch hole 23 for guiding the binding belt 21 of the binding belt to pass through, and the distance between the side of the lock catch hole 23 away from the contact surface and the contact surface increases from the lock catch 22 to the binding belt 21 fixedly connected along the length direction, so that the gap between the binding belt 2 and the sternum or muscle tissue is avoided, and the infection of a patient is prevented. The latch holes are used to fix the strapping 21 to the latches 22 relatively firmly.

The two sides of the sternum connecting ribs are the left side and the right side of the sternum, and the lock catch 22 of the binding belt 2 is used for being fixed on the left side or the right side of the sternum. This fixation pattern and position facilitates rapid growth of muscle tissue on the surface of the sternum, reducing healing time.

The ribbon 2 is made of high polymer materials, such as polyether-ether-ketone, has good physical and mechanical properties and biocompatibility, and meets the requirements of implantation medical instrument standards.

Referring to fig. 5, 6, 7 and 8, the band 2 is in an i-shape or cross-shape, so that the band 2 is not easily displaced after operation. In an alternative embodiment, the band 2 may also be provided in the form of a band, which is less stable than an i-shape and a cross-shape, but is simpler to handle. Meanwhile, the straps with different shapes are applicable to different sternum positions, the I-shaped straps are applicable to be fixed on the sternum connected with the ribs, the cross-shaped straps are applicable to be fixed on the sternum handles or the sternum connected with the ribs, and the strap-shaped straps are applicable to be placed in the gap between the two ribs. These designs allow the sternal fixation system to be applied to the surface of the sternum in a seamless fashion, avoiding the formation of false cavities and resulting infections of the sternum.

The method comprises the following steps:

referring to fig. 5, the binding band 2 is in an i shape, and the binding band 2 includes at least two binding bands 21 arranged side by side, and adjacent binding bands 21 are connected by a connecting structure 24; one end of the binding belt 21 is fixed with a guiding hook 1; the other end of the binding belt 21 is fixed with a lock catch 22. The interval between two strapping tapes arranged side by side of the I-shaped strapping tape 2 is just the width of the corresponding rib, so that the strapping tape 2 is not easy to shift after operation, and the strapping tape is fixed on the surface of the sternum more firmly.

Referring to fig. 6, the binding belt 2 is in a cross shape, the binding belt 2 comprises at least two binding belts 21, and the same side of each binding belt 21 is connected with a guide hook 1; the two binding bands 21 are hinged or fixedly connected in a crossed manner. The hinging mode can rotate the two binding belts 21 to proper positions according to the shape of the sternum of a patient and then bind and fix the two binding belts, so that the application range is wider; the cross-shaped fixed connection needs to be selected according to the shape and the size of the sternum of a patient, and the application range is relatively narrow, but the fixation is firmer.

Referring to fig. 7 and 8, the binding band 2 includes at least two binding bands 21 arranged side by side, the ends of all the binding bands 21 are connected with a lock catch 22, and the lock catch 22 is provided with a lock catch hole 23 for clamping the binding bands 21, so as to firmly fix the binding bands 21 on the lock catch 22. The catches of the ends of adjacent strapping bands 21 may be connected by a connecting structure 24.

The using method comprises the following steps:

in the operation process, the guide hook 1 passes through the muscle tissue on one side of the sternum and then passes through the muscle tissue on the other side of the sternum, the joint of the guide hook 1 and the ribbon 2 is cut off, after the sternum is aligned and spliced, the two sides of the sternum are clamped by the instrument, the two sides of the sternum are completely combined, and then the ribbon 2 is firmly locked and connected on the side face of the sternum.

The beneficial effects are that:

the novel sternum fixing system made of the polymer material can enable the sternum separated from left and right in operation to be overlapped in three dimensions of up and down, left and right and front and back, ensure that the damaged sternum is combined in a safest mode, and can heal and grow quickly and accurately, and the ribbon 2 can be firmly fixed on the surface of the sternum without displacement.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The sternum fixing system comprises a guide hook and a binding belt, and is characterized in that the guide hook comprises a guide part, a bending and turning part and a connecting part which are sequentially connected;

the guide part is a tip part, the thickness and the width of the tip part are gradually reduced from the position close to the bending turning part to the position far away from the bending turning part, and the guide part is of a linear structure;

the bending steering part is bent in an arc shape;

the connecting part is used for being connected with the ribbon;

the included angle between the length direction of the guide part and the length direction of the connecting part is an acute angle;

the guide hooks are turned in a multi-section mode, so that a passing channel is enlarged, and the resistance of the binding belt passing is reduced;

taking one side surface of the binding belt, which contacts with the sternum, as a contact surface;

the lock catch of the ribbon is provided with a lock catch hole for guiding the binding ribbon of the ribbon to pass through, the end part of the lock catch hole, which is far away from the ribbon, is the penetrating end of the ribbon, and the distance between one side of the lock catch hole, which is adjacent to the contact surface, and the contact surface increases gradually along the length direction from the lock catch to the binding ribbon fixedly connected;

the locking holes are used for clamping the binding bands.

2. The sternal fixation system of claim 1, wherein: the outer surface of the guide hook is coated with a coating for preventing nickel ions from being precipitated and reducing friction.

3. The sternal fixation system of claim 1, wherein: the side of the guiding hook, which is connected with the ribbon, is provided with a pattern structure;

the pattern structure is provided with at least one hole, and the pattern structure is provided with holes in a single row, a double row or a plurality of rows;

the shape of the hole is any one of a circle, an ellipse, a heart, a waist and a polygon;

the hole is a blind hole which does not penetrate through the connecting part of the guide hook or a through hole which penetrates through the connecting part of the guide hook.

4. The sternal fixation system of claim 1, wherein: the connecting part comprises a first end part connected with the bending steering part and a second end part connected with the binding belt, the first end part is connected with the second end part, and the cross section area of the first end part is larger than or equal to that of the second end part;

the tie is injection molded at the second end.

5. The sternal fixation system of claim 1, wherein: the binding belts comprise binding belts which are sequentially connected and the lock catches, and the binding belts are fixedly connected with the connecting parts;

one side of the binding belt is provided with grooves for clamping the lock catches, and the grooves are provided with at least two grooves along the length direction of the binding belt;

the other side of the binding belt is a smooth surface.

6. The sternal fixation system of claim 1, wherein: the two sides of the sternum connecting ribs are the left side and the right side of the sternum, and the lock catch of the binding belt is used for being fixed on the left side or the right side of the sternum.

7. The sternal fixation system of claim 1, wherein: the ribbon is I-shaped, crossed or banded.

8. The sternal fixation system of claim 1, wherein: the binding belts are I-shaped, each binding belt comprises at least two binding belts which are arranged side by side, and adjacent binding belts are connected through a connecting structure;

one end of the binding belt is fixed with one guide hook;

the other end of the binding belt is fixed with the lock catch.

9. The sternal fixation system of claim 1, wherein: the binding belt is in a cross shape and comprises at least two binding belts, and the guide hooks are connected to the same sides of the binding belts;

the binding belts are mutually hinged or fixedly connected in a crossed mode.