CN209713019U - Operation suture thread, stitching devices and heart valve or Suture device - Google Patents

Abstract

The utility model relates to a kind of operation suture thread, stitching devices and heart valve or Suture devices, the operation suture thread includes flattening portion, the length in the flattening portion and the length ratio of the operation suture thread are greater than 0.5, there are two flatten plane for setting in the flattening portion, described two flattening planes are oppositely arranged, described two two sides for flattening plane pass through two cambered surface connections respectively, between 1.4-1.98, the thickness in the flattening portion is equal to the distance between described two flattening planes for the ratio between the width and thickness in the flattening portion.The operation suture thread of the utility model had not only facilitated the twirl knot at operation suture thread both ends to fix or knot fixation, but also made to suture tissue to the stress of operation suture thread more evenly, it is possible to reduce the damage to musculature, bone tissue；Meanwhile opposite broaden of operation suture thread also increases frictional force between operation suture thread and bone face with the contact surface of bone tissue, reduces operation suture thread and causes to tie up the risk of loosening in the sliding of bone face.

Description

Operation suture thread, stitching devices and heart valve or Suture device

Technical field

The utility model relates to the field of medical instrument technology, in particular to a kind of operation suture thread, stitching devices and heart Valve or Suture device.

Background technique

Department of cardiovascular surgery often takes Median sternotomy approach to carry out cardiovascular thoracic surgery operation, chest cardiovascular surgery at present The fixation of breastbone two sides fracture end must be carried out after the completion of processing, the fixed breastbone broken ends of fractured bone is frequently with operation suture thread or metal at present Stitching devices cerclage closes Intersternal incision to restore the integrality of the wall of the chest.Operation suture thread or metal suture device generally comprise seam Needle and metal operation suture thread or macromolecule operation suture thread are closed, when closing Intersternal incision after doctor completes cardiovascular surgery, Sewing needle draws operation suture thread and passes through breastbone tissue or carry out cerclage to breastbone through intercostal soft tissue abutting breastbone surface, twist and tie Or it knots and fixes.Existing operation suture thread is usually that section is circular metal operation suture thread or macromolecule operation stitching Line, operation suture thread and the direct contact area on breastbone surface are very small when cerclage breastbone, close to a line, this line contact side Formula directly results in operation suture thread in unit area and increases the pressure that breastbone applies, the respiratory movement of human body, limb activity and Cough etc. easily causes chest muscle group from tendency and fine motion, operation suture thread to be made to be easy to line the breastbone lobed ingredient of the left and right sides Saw sample isolates the cortical bone at left and right sides of breastbone, shows particularly evident for the elderly of osteoporosis, is easy to appear operation Suture incision breastbone causes interior fixed loosen that the displacement of breastbone valve, notch exudation is caused to increase and easily cause local infection, chest Bone groove delayed union or disunion, in addition it is fixed in occurring fall off or even close the chest complication such as unsuccessfully, seriously threaten patient and give birth to Life.Based on this, people improve operation suture thread, are that circular operation suture thread is changed to include to flatten by cross section The operation suture thread in portion.But if the width and thickness ratio in flattening portion is excessive, operation suture thread is not easy to twist knot or beat Knot, and surrounding soft tissue is easy to damage during twisting knot or knotting；If the width and thickness ratio in flattening portion is too small, Less, operation suture thread still has the risk for isolating breastbone to the variation of operation suture thread forced area after fixing.Therefore, it is necessary to right Operation suture thread with flattening portion does further improvement, keeps the performance of operation suture thread more excellent, both ties up convenient for suture, It is fixed again convenient for twisting knot or knotting.

In addition, valve suture or vascular suture all use circular surgical stapler in cardiovascular surgical operation at present Line, but sewing needle, in order to clamp conveniently, needle body clamping part section is often made with flat face structure, and this stitches sewing needle and operation The needlework sectional area ratio of zygonema is commonly greater than optimal 1:1 ratio, since cardiac pumping function is to the blood of blood circulation access Apply higher promotion pressure, this intravascular pressure makes excessive needlework sectional area than being easier to cause the blood in postoperative pinprick gap Liquid leakage becomes even more serious because blood is unable to spontaneous coagulation blocking gap especially under test tube of hepari state, has greatly aggravated to suffer from The postoperative Hidden blood loss of person.

Summary of the invention

Based on this, the utility model is provided a kind of not only small to injury of human but also is filled convenient for the operation suture thread of operation, suture It sets and heart valve or Suture device.

On the one hand the utility model provides a kind of operation suture thread, including flattening portion, the length in the flattening portion with it is described The length ratio of operation suture thread is greater than 0.5, and there are two flatten plane, described two flattening plane phases for setting in the flattening portion To setting, described two two sides for flattening plane pass through two cambered surface connections, the ratio between the width and thickness in the flattening portion respectively Between 1.4-1.98, the thickness in the flattening portion is equal to the distance between described two flattening planes.

Preferably, the ratio between the width and thickness in the flattening portion is between 1.5-1.8.

Preferably, the length ratio of the length in the flattening portion and the operation suture thread is 0.8-1.

Preferably, described two two sides for flattening plane pass through two semicircle cambered surface connections, the thickness in the flattening portion respectively Degree is equal to the diameter of the semicircle cambered surface, and described two width for flattening plane are greater than the radius of the semicircle cambered surface and are less than institute State the diameter of semicircle cambered surface；Or

Described two two sides for flattening plane pass through two arc surface connections, the thickness and the circle in the flattening portion respectively The diameter ratio of cambered surface is more than or equal to 0.8 and less than 1.

Preferably, the operation suture thread further includes having buckle, and the buckle is fixedly connected on the operation suture thread One end.

Preferably, it is described buckle have the first fixed part and the second fixed part, one end of the operation suture thread with it is described The second fixed part connection of buckle.

Preferably, the second fixation hole is provided on second fixed part, described in one end insertion of the operation suture thread It is in second fixation hole and fixed.

Preferably, first fixed part is connected with second fixed part by connecting plate, and first fixed part And second have gap between fixed part, the face opposite with first fixed part on second fixed part is relative to institute State the guide surface inclined axially outward of the first fixation hole.

Preferably, it is provided with the first fixation hole on first fixed part, first fixation hole is through-hole, described first One end of fixation hole is towards second fixed part.

The utility model embodiment also provides a kind of stitching devices, including hand described in sewing needle and any of the above-described embodiment Art suture, one end that the operation suture thread is connect with the sewing needle are first end, and the sewing needle and the operation are stitched One end of zygonema connection is provided with mounting portion, and the mounting portion of the sewing needle is connected to the first end of the operation suture thread.

Preferably, mounting hole is provided on the mounting portion of the sewing needle, the operation suture thread is inserted into the mounting hole In and can be rotated in the mounting hole.

The utility model embodiment also provides a kind of heart valve or Suture device, including sewing needle and any of the above-described Operation suture thread described in embodiment, the sewing needle are made of metal material, and needle body flattening portion is formed on the sewing needle, The operation suture thread is sub-thread operation suture thread made of high molecular material, one end of the operation suture thread and the suture Needle connection.

There are two flattening planes for the flattening portion setting of the operation suture thread of the utility model, and the two sides in two flattening portions are logical Cambered surface connection is crossed, the width and thickness ratio in flattening portion both facilitates the twirl knot at operation suture thread both ends to fix or beat in 1.4-1.98 Knot is fixed, and is made to suture tissue to the stress of operation suture thread more evenly, it is possible to reduce to musculature, bone tissue, liver group The damage knitted；Meanwhile opposite broaden of operation suture thread also makes to rub between operation suture thread and bone face with the contact surface of bone tissue Power increases, and reduces operation suture thread and easily causes the risk for tying up loosening in the sliding of bone face.In addition, the operation in this band flattening portion is stitched Zygonema, stitching devices and heart valve or Suture device can improve needlework ratio, can obviously reduce heart valve, blood vessel seam The risk of pinprick gap blood leakage, more excellent performance when conjunction.

Detailed description of the invention

It is more particularly described by the preferred embodiment in the utility model shown in the drawings, the above and other mesh of the utility model , feature and advantage will become more fully apparent.Identical appended drawing reference indicates identical part in all the attached drawings, and does not carve Meaning draws attached drawing by actual size equal proportion scaling, it is preferred that emphasis is shows the purport of the utility model.

Fig. 1 is the overall structure figure of the operation sewing needle of the preferred embodiment in the utility model；

Fig. 2 is the sectional view in the direction AA in Fig. 1；

Fig. 3 is the overall structure figure of the buckle of the preferred embodiment in the utility model；

Fig. 4 is the part-structure figure of the stitching devices of the preferred embodiment in the utility model；

Fig. 5 is the portion a partial enlarged view in Fig. 4；

Fig. 6 is the structural schematic diagram under the fixed breastbone state of operation suture thread of the utility model.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.

It should be noted that it can be directly to separately when an element is considered as " connection " another element One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one End ", " other end " and similar statement are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Term used in book described herein is intended merely to describe specific reality Apply the purpose of example, it is not intended that in limitation the utility model.Term as used herein "and/or" includes one or more related Listed item any and all combinations.

With reference to Fig. 1-6, on the one hand the utility model provides a kind of operation suture thread, including flattening portion 12, flattening portion 12 The length ratio of length and the operation suture thread is greater than 0.5.There are two flatten plane 121, two flattenings for setting in flattening portion 12 Plane 121 is oppositely arranged.In the prior art, generally using section is circular operation suture thread, hand few with breastbone contact area Art suture and breastbone contact surface are almost a line, and it is bigger to twist stress in tight operation suture thread metasternum unit area, meeting Breastbone is caused to damage, and the flattening plane 121 in flattening portion 12 and breastbone contact area are larger, it is possible to prevente effectively from above-mentioned feelings Condition reduces the injury to human body.When suturing tissue, flattens plane and contacted with human body breastbone, effectively reduce chest in unit area The stress load of bone reduces injury of the operation suture thread to human body.With reference to Fig. 2, the two sides of two flattening planes 121 pass through respectively Two cambered surfaces 122 connect, and cambered surface 122 is smoother, few to human injury.The ratio between the width L1 and thickness L2 in flattening portion 121 exist Between 1.4-1.98, and the thickness in flattening portion 12 is equal to the distance between two flattening planes 121.If the width in flattening portion 12 Excessive with thickness ratio, i.e., flattening portion is very thin, will lead to operation suture thread and is not easy to twist tightly, and very thin flattening category is like knife Sword, has certain injury power, and musculature easy to cut is very big to human injury；If the width and thickness in flattening portion 12 Ratio is too small, and operation suture thread still can cause to damage after being fixed to breastbone, and the ratio between the width and thickness in flattening portion 12 is limited It is possible to prevente effectively from the generation of above situation between 1.4-1.98, while the twirl knot for being beneficial to suture is fixed or knots fixation.

With reference to Fig. 2, in a preferred embodiment, the ratio between the width L1 and thickness L2 in flattening portion 12 are between 1.5-1.8, into one Step optimizes the performance of the operation suture thread, keeps the practicality and safety all more preferable.If the width L1 and thickness in flattening portion 12 The ratio of L2 is too big, and the two sides of operation suture thread will damage human body soft tissue and nerve fiber as sharp blade.

With reference to Fig. 1, in a preferred embodiment, the length ratio of the length in flattening portion and the operation suture thread is 0.8-1. Operation suture thread can whole (i.e. whole length) be flattening portion 12 entirely, naturally it is also possible to have one in its end or other positions Part section is round or ellipse position, as long as not influencing the use of operation suture thread.

In a preferred embodiment, the two sides of two flattening planes 121 pass through two semicircle cambered surface connection (i.e. cambered surfaces respectively 122 be semicircle cambered surface), the thickness in flattening portion 12 is equal to the diameter of semicircle cambered surface, and the width of two flattening planes 121 is greater than semicircle The radius of cambered surface and the diameter for being less than semicircle cambered surface, at this point, line width L3 is equal to the width L1 in flattening portion and the thickness of semicircle cambered surface The sum of (i.e. the diameter of semicircle cambered surface) L2.In another preferred embodiment, the two sides of two flattening planes 121 pass through two respectively Arc surface connection (i.e. cambered surface 122 is arc surface), the thickness in flattening portion 12 and the diameter ratio of arc surface are more than or equal to 0.8 and small In 1, so that the curved angle of cambered surface 122 is unlikely to too small, keep it more mellow and fuller, tissue will not be hurt.Meanwhile in the present embodiment The twirl knot that the width-thickness ratio and two sides cambered surface for controlling the flattening portion of operation suture thread can effectively be convenient to metal operation suture thread is fixed Or the knotting of high molecular material operation suture thread is fixed.

With reference to Fig. 4, in a preferred embodiment, operation suture thread further includes having buckle 3, and buckle 3 is fixedly connected on operation seam One end of zygonema 1.Buckle 3 can prevent the second end 13 of operation suture thread 1 from passing through tissue (in use, operation suture thread The one end connected with sewing needle is first end 11, and the other end is second end 13), the not set buckle 3 of the prior art, operator has can Can be firmly excessive, the second end 13 of operation suture thread 1 is pulled through tissue, this situation occurs, it is necessary to suture, can prolong again Long operating time, and it is larger to human body wound.

In further preferred embodiments, buckle 3 has the first fixed part 31 and the second fixed part 32, operation suture thread Second end 13 is connect with the second fixed part 32 of buckle 3.Further, it is provided with the second fixation hole 321 on the second fixed part 32, The second fixed part 32 of buckle 3 is squeezed in second fixation hole of the insertion of second end 13 321 of operation suture thread and using tool The second end 13 of the second fixed part 32 and operation suture thread that buckle 3 is fixed.Arc-shaped chamfering is all arranged in the corner angle of buckle 3 Shape, injury of the less corner angle to human body.

With reference to Fig. 3, in a preferred embodiment, the first end 11 of operation suture thread is for connecting sewing needle 2, the first fixed part 31 for fixing the first end 11 of operation suture thread 1 or wiping out the free end after sewing needle 2, the first end of operation suture thread 1 After 11 (or free ends) and second end 13 are all fixedly connected with buckle 3, that is, complete the fixation work of operation suture thread 1.It is existing In technology, general by the way of fastening the both ends of operation suture thread 1 twirl, metal wire is elastic not when hand operation twists tight One, it is also possible to occur twisting and cause to tie up position broken string and need row wiring fixation again again, secondary injury is caused to human body.Separately Outside, it is more to twist the tubercle protrusion that fastening is shaped as, and the bad control of smoothness, its hetero-organization of breastbone side can be caused to damage Wound, and the generation for effectively preventing above situation is fastened instead of twisting using buckle 3 is fixed, avoid unnecessary injury.

With reference to Fig. 3, in further preferred embodiments, the first fixation hole 311 is provided on the first fixed part 31, first is solid Determining hole 311 is through-hole, one end the second fixed part 32 of direction of the first fixation hole 311.First fixation hole 311 and the second fixation hole 321 is coaxial or axial parallel, is more uniformly stressed the operation suture thread after being fixed 1.With reference to Fig. 6, sutures and close in thoracic cavity It closes in surgical procedure, sewing needle 2 passes through thoracic tissues and draws the operation suture thread 1 across the thoracic tissues surface of a wound, operation stitching Line 1 bypasses the bone surface of the left valve 100 of breastbone and the right valve 200 of breastbone, the first end of operation suture thread 1 under the traction of sewing needle 2 11, around to breastbone prebone face and across the first fixation hole 311 of the first fixed part 31, pass through the first end for tightening operation suture thread 1 11 (or free ends), then using tool squeeze buckle 3 the first fixed part 31, make buckle 3 by first end 11 (or operation The free end of suture 1) it is fixed, that is, it completes to tie up work, it is easy to use and few to human injury.

In a preferred embodiment, the first fixed part 31 and the second fixed part 32 are connected by connecting plate 33, and first is fixed Portion 31, the second fixed part 32 and interconnecting piece 33 are integrally formed.There is gap between first fixed part 31 and the second fixed part 32, the The face opposite with the first fixed part 31 on two fixed parts 32 is the guiding inclined axially outward relative to the first fixation hole 311 Face 322.Further, guide surface 322 relative to connecting plate 33 upwards inclination (i.e. guide surface 322 from bottom to top gradually to Direction far from the first fixed part 31 tilts), alternatively, guide surface 322 is tilted to side；Facilitate the first end of operation suture thread 1 11 stretch out from the guide surface 322.

With reference to Fig. 4, the utility model also provides a kind of stitching devices, the operation seam including sewing needle 2 and any of the above-described Zygonema 1, one end that operation suture thread 1 is connect with sewing needle 2 are first end 11, one end that sewing needle 2 is connect with operation suture thread 1 It is provided with mounting portion 23, the mounting portion 23 of sewing needle 2 is connected to the first end 11 of operation suture thread 1.

With reference to Fig. 5, in a preferred embodiment, mounting hole 231, operation suture thread are provided on the mounting portion 23 of sewing needle 2 It can rotate in insertion mounting hole 231 and in mounting hole 231.Because of the installation of the opposite sewing needle 2 of the first end 11 of operation suture thread 1 Hole 231 can be rotated, so when operation suture thread 1 is when thoracic cavity sutures and closes in surgical procedure the case where twisting, operation seam Zygonema 1 can rotate to make the position of its torsion, i.e., the position reversed operation suture thread 1 in order with the opposite direction of itself torsional direction It restores to the original state, is beneficial to reduce the risk that the frictionally damage of suture tissue and postoperative surgical suture are snapped, is also beneficial to chest Going on smoothly for operation is closed in chamber suture.Further, the diameter of mounting hole 231 is greater than the maximum of operation suture thread first end 11 Width allows sewing needle 2 to do 360 ° of rotation relative to operation suture thread 1, uses more convenient.

In further preferred embodiments, 231 inner wall of mounting hole is provided with the protrusion protruded to 321 central axis of mounting hole 2311, protrusion 2311 is in circular ring shape, and the 11 periphery wall surface of first end of operation suture thread 1 offers the (limiting slot 111 of limiting slot 111 Can also only be provided on the maximum position of cross-sectional width, limit can not be played the role of by being opened in other positions), protrusion 2311 Diameter is less than the maximum gauge of operation suture thread, and protrusion 2311 is caught in limiting slot 111.By the way that 231 inner wall of mounting hole is arranged in Protrusion 2311 engages with the limiting slot 111 of first end 11, so that the mounting portion of the first end 11 of operation suture thread 1 and sewing needle 2 23 stable connections prevent operation suture thread 1 from deviating from from sewing needle 2.Pass through vehicle in the end face of the mounting portion 23 of sewing needle 2 first The mounting hole 231 that shape is cylindrical hole is made in the modes such as system；Then lead on 11 periphery wall surface of the first end of operation suture thread 1 It crosses the modes such as vehicle and limiting slot 111 is made, the first end 11 of operation suture thread 1 is inserted into mounting hole 231；Finally in mounting portion The position that limiting slot 111 is corresponded on 23 outer surface, which applies pressure, (can be arranged on the surface of mounting portion and indicate, indicate operation seam When zygonema is inserted into the bottom of mounting hole, the position of corresponding limiting slot is more convenient to use), make mounting portion 23 along the diameter of mounting hole 231 To recess, 231 inner wall of mounting hole forms the protrusion 2311 protruded to the mounting hole central axis, and protrusion 2311 is caught in limiting slot 111 In.

In a preferred embodiment, the first end 11 of operation suture thread 1 and 23 clearance fit of mounting portion, so that first end 11 can It is rotated relative to mounting portion 23, and is not necessarily to roll stitch needle 2, the position that operation suture thread 1 reverses can also restored to the original state.

In further preferred embodiments, first end 11 is 360 ° relative to the rotation angle of mounting portion 23.Due to operation The first end 11 of suture 1 can be rotated by 360 ° relative to the mounting portion 23 of sewing needle 2, therefore operation suture thread 1 can be at either one Rotation upwards makes the operation suture thread 1 of torsional deflection in order beneficial to doctor when carrying out thoracic cavity suture and closing operation.

In a preferred embodiment, operation suture thread 1 is made of metal material.1 preferred cross-sections of operation suture thread are circular Steel wire applies pressure to steel wire, it is made to be crushed, and upper and lower surface is generally planar, forms flattening portion 12.In operation suture thread Flattening portion 12 is set on 1, and flattening portion 12 can increase the bearing area in breastbone bone face, and validation solution operation suture thread 1 cuts breastbone The risk cut.Meanwhile the opposite contact surface broadened with bone tissue of operation suture thread 1, also make to rub between operation suture thread 1 and bone face It wipes power to increase, reduces the risk that operation suture thread 1 ties up loosening caused by the sliding of bone face.In further preferred embodiments, Flattening portion 12 molding is flattened by circular operation suture thread 1.Molding flattening portion 12 is flattened on operation suture thread 1, can be simplified The moulding process in flattening portion 12 can also save the production materials of operation suture thread 1.In another preferred embodiment, operation seam Zygonema 1 can also be the monofilament suture made of high molecular material.

In further preferred embodiments, operation suture thread 2 is monofilament or mariages, and mariages is respectively fixedly connected with for both ends Between first end 11 and second end 13, welding manner is can be used in connection type.

In further preferred embodiments, sewing needle 2 is arc, semicircle or U-shaped, and the needle tip 22 of sewing needle 2 is also With the flat-shaped end of blunt mouth (not shown), it can effectively be mitigated across rib using the sewing needle 2 with the flat-shaped end of blunt mouth Between damage of the soft tissue to soft tissue and neighbouring blood vessel, lymphoid tissue.

The utility model embodiment also provides a kind of heart valve or Suture device comprising sewing needle and above-mentioned Operation suture thread described in one embodiment, sewing needle are made of metal material, needle body flattening portion are formed on sewing needle, for supplying Operator is clamped using surgical clamp.Needle body flattening portion also has that there are two the needle bodies that are oppositely arranged to flatten plane, two needle bodies The two sides for flattening plane can be connected by arcwall face.The flattening direction in needle body flattening portion substantially with the flattening on operation suture thread The flattening direction in portion is consistent namely needle body flattens plane and the flattening plane of operation suture thread is substantially parallel.Operation suture thread 1 is Monofilament suture is made in high molecular material, and one end of operation suture thread 1 is connect with sewing needle.Cooperated by flat wire existing flat Needle keeps needlework cross-sectional area ratio smaller, and pinprick gap is effectively reduced, and blood leakage is reduced, simultaneously because flat wire opposite joint is combined and knits Forced area become larger, make suture valvular tissue or vascular wall stress more evenly, it is possible to reduce stitched with or without the use of gasket Sympetalous membrane tissue especially makes valve suture footprints smaller in cycling suturing valve, conducive to unit area valve is improved Blood pump output effectively improves the functional level of operative cardiac.

There are two flattening planes for the flattening portion setting of the operation suture thread of the utility model, and the two sides in two flattening portions are logical Cambered surface connection is crossed, the width and thickness ratio in flattening portion facilitates the both ends of operation suture thread to twist and fasten in 1.4-1.98, and make Obtain the stress of operation suture thread more evenly, it is possible to reduce the damage to musculature, bone tissue or heart valve, blood vessel, property It can be more excellent.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

The specific embodiment of utility model above described embodiment only expresses, the description thereof is more specific and detailed, but It cannot be understood as the limitations to utility model patent range.It should be pointed out that for the ordinary skill of this field For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this The protection scope of utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (12)

1. a kind of operation suture thread, which is characterized in that including flattening portion, length and the operation suture thread in the flattening portion Length ratio is greater than 0.5, and there are two plane is flattened, described two flattening planes are oppositely arranged, described for setting in the flattening portion The two sides of two flattening planes pass through the connection of two cambered surfaces respectively, the ratio between the width and thickness in the flattening portion 1.4-1.98 it Between, the thickness in the flattening portion is equal to the distance between described two flattening planes.

2. operation suture thread according to claim 1, which is characterized in that the ratio between the width and thickness in the flattening portion exists Between 1.5-1.8.

3. operation suture thread according to claim 1, which is characterized in that the length in the flattening portion and the operation stitching The length ratio of line is 0.8-1.

4. operation suture thread according to claim 1, which is characterized in that described two two sides for flattening plane pass through respectively Two semicircle cambered surface connections, the thickness in the flattening portion are equal to the diameter of the semicircle cambered surface, described two width for flattening plane Degree is greater than the radius of the semicircle cambered surface and is less than the diameter of the semicircle cambered surface；Or

Described two two sides for flattening plane pass through two arc surface connections, the thickness and the arc surface in the flattening portion respectively Diameter ratio be more than or equal to 0.8 and less than 1.

5. operation suture thread according to claim 1, which is characterized in that the operation suture thread further includes having buckle, institute State one end that buckle is fixedly connected on the operation suture thread.

6. operation suture thread according to claim 5, which is characterized in that there is the buckle the first fixed part and second to consolidate Determine portion, one end of the operation suture thread is connect with the second fixed part of the buckle.

7. operation suture thread according to claim 6, which is characterized in that it is fixed to be provided with second on second fixed part Hole, one end of the operation suture thread are inserted into second fixation hole and fixed.

8. operation suture thread according to claim 6, which is characterized in that first fixed part and second fixed part Connected by connecting plate, and there is gap between first fixed part and the second fixed part, on second fixed part with The opposite face of first fixed part is the guide surface inclined axially outward relative to first fixation hole.

9. operation suture thread according to claim 6, which is characterized in that it is fixed to be provided with first on first fixed part Hole, first fixation hole are through-hole, and one end of first fixation hole is towards second fixed part.

10. a kind of stitching devices, which is characterized in that including sewing needle and such as the described in any item operation stitchings of claim 1-9 Line, one end that the operation suture thread is connect with the sewing needle are first end, and the sewing needle and the operation suture thread connect The one end connect is provided with mounting portion, and the mounting portion of the sewing needle is connected to the first end of the operation suture thread.

11. stitching devices according to claim 10, which is characterized in that be provided with installation on the mounting portion of the sewing needle Hole, the operation suture thread are inserted into the mounting hole and can rotate in the mounting hole.

12. a kind of heart valve or Suture device, which is characterized in that including sewing needle and such as any one of claim 1-9 The operation suture thread, the sewing needle are made of metal material, and needle body flattening portion, the hand are formed on the sewing needle Art suture is sub-thread operation suture thread made of high molecular material, and one end of the operation suture thread and the sewing needle connect It connects.