A self-locking rotatable rib fracture fixation device for laparoscopic surgery

Abstract

The invention discloses a self-locking rotatable rib fracture fixation instrument for laparoscopic surgery, comprising four clamping and fixing hooks; two cross-arranged connecting parts, each of which has a clamping and fixing hook at both ends, and the two connecting parts are cross-arranged to form two groups of fixing hook groups that cooperate to clamp and fix the ribs, and also comprises a rotation locking part, which is arranged at the intersection position between the two connecting parts, and comprises a cylindrical protruding structure and a circular ring structure with a cylindrical hole groove, and the cylindrical protruding structure extends into the cylindrical hole groove to realize the cross combination; and also comprises a locking protrusion and a locking tooth arranged on the outer side wall of the cylindrical protruding structure or the inner side wall of the cylindrical hole groove, and the locking protrusion and the locking tooth cooperate to allow rotation in only one direction, and the rotation in a single direction makes the two clamping and fixing hooks of each group of fixing hooks relatively close to and close to the ribs, and at the same time, the locking protrusion enters the position between the corresponding two locking teeth, and locks the close position to fix the ribs.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular to the field of devices for rib fractures, and specifically is a self-locking rotatable rib fracture fixation device for laparoscopic surgery. Background Art

[0002] The rib is a small arc-shaped bone, one end of which is connected to both sides of the vertebrae of the trunk, and is bent along the body wall. The other end is in a free flesh state or connected to the sternum in the center of the chest. The rib is a flat rib-arch bone, which has a special position and a special shape. It is also a bone with a high incidence of fractures. However, the curved and flat shape, which is different from other bones, makes traditional fixation devices unsuitable for ribs. Currently, the commonly used fixation devices after rib fractures mostly use multi-segment holding structures to surround the unfractured bones on both sides of the fracture for a certain distance, or use a longer elastic locking plate combined with locking pins for fixation. However, because the ribs are flat, a large number of locking devices need to be set.

[0003] Whether it is a multi-segment holding structure fixation method such as CN203777033U-a rib bone fracture plate; or an attached fixation method that combines a locking plate and a locking nail for fixation such as CN202010802000.9_degradable and absorbable magnesium alloy rib fracture fixation plate and fixation device system; both are long and difficult to perform through minimally invasive surgery. In this way, because they need to be set in a larger area of ​​the rib position, the surgical window is large and the damage to the patient is great.

[0004] Therefore, there is a need for a fixation device that has a small overall structure and can preferably be performed in a minimally invasive environment, and specifically provides a self-locking rotatable rib fracture fixation device for laparoscopic surgery. Summary of the invention

[0005] The current technical solution for holding the ribs to complete fixation in the existing technology is made of special memory materials. This material is soft at low temperatures and is attached to the position of the fractured ribs in a soft state. When it reaches body temperature, the memory material will return to its original shape and hold the ribs at the same time. The existing technology combining titanium plates and locking nails has a problem that the locking nails are short due to the flat ribs. If the titanium plates are to be fixed, more locking nails need to be densely set, but too many locking nails will affect the stability of the ribs. However, the problems with the above two methods are that the entire fixing structure is long, the covered rib area is large, the window that needs to be opened during surgery is large, and the patient's recovery time after surgery is long. The entire operation cannot be performed under minimally invasive conditions. In addition, once the instrument is inserted, it is easy to adhere to the surrounding tissues, making it particularly difficult to remove the instrument.

[0006] The present invention constructs a technical solution of rotation adjustment and locking the fixed position at the same time during rotation adjustment by using the idea of ​​cross-arranged connection part 1 and connection part 2 connecting two groups of fixing hook groups. The specific technical solution is: a self-locking rotatable rib fracture fixation device under laparoscopic surgery, which includes:

[0007] Clamping and fixing hooks, 4 pieces are provided;

[0008] There are two connecting parts, namely, connecting part 1 and connecting part 2; one clamping and fixing hook is set at both ends of each connecting part, and the two connecting parts are arranged crosswise, so that the four clamping and fixing hooks are constructed into two pairs of fixing hook groups with hooks facing oppositely for clamping and fixing the ribs, and the two clamping and fixing hooks of each fixing hook group are one at one end of the connecting part and the other at the other end of the connecting part;

[0009] The rotation locking part is arranged at the intersection between the two connecting parts, and the rotation adjustment angle between the two connecting parts is achieved by the rotation locking part. The rotation locking part includes

[0010] A cylindrical protruding structure is disposed in the middle of the connecting portion 1 and is integrally connected to the connecting portion 1;

[0011] The annular structure with a cylindrical hole groove is arranged in the middle of the second connecting part and is integrally connected with the second connecting part, and the cylindrical protruding structure extends into the cylindrical hole groove to realize the cross combination of the first connecting part and the second connecting part;

[0012] A locking protrusion and a plurality of locking teeth arranged in a circumferential array, wherein the locking protrusion is arranged on the outer wall of the cylindrical protruding structure or the inner wall of the cylindrical hole groove, and the corresponding locking teeth are arranged on the inner wall of the cylindrical hole groove or the outer wall of the cylindrical protruding structure. The locking protrusion cooperates with the locking teeth to only allow the cylindrical protruding structure to rotate in one direction in the cylindrical hole groove.

[0013] Among them, the connection part one and the connection part two rotate in a single direction along with the rotating locking part. The rotation in a single direction makes the two clamping fixing hooks of each group of fixing hooks relatively close to each other, and at the same time the locking protrusion enters the corresponding locking tooth position to lock the position of the connection part one and the connection part two.

[0014] The cylindrical protruding structure is extended into the cylindrical hole groove to realize the cross-combination of the connecting part one and the connecting part two, and the ring structure with the cylindrical hole groove rotates around the cylindrical protruding structure to realize the rotation of the connecting part one and the connecting part two, and at the same time, the two clamping fixing hooks of each group of fixing hook groups are relatively moved close to each other until the two clamping fixing hooks of each group are relatively close to each other on both sides of the fractured rib, one group of fixing hook groups is fixed on one side of the rib fracture surface, and the other group of fixing hook groups is fixed on the other side of the rib fracture surface. After they are effectively close to each other, because there are corresponding self-locking locking and locking teeth, the connecting part one and the connecting part two will not rotate in direction after being close to each other, and the two groups of fixing hook groups firmly fix the ribs.

[0015] Furthermore, in order to ensure the clamping stability of the fixation device and the clamping space of the fixed structure will not be affected by the curvature of the ribs, the rotation locking part is set in the middle of the connection part 1 and the connection part 2, with the rotation locking part as the center, and the two clamping and fixing hooks on each connection part are symmetrical; the rotation locking part has a clamping and fixing state, and the distance between the two clamping and fixing hooks on the same side of the two sets of fixing hooks in the clamping and fixing state is L, and L is less than 2cm. Both the connection part 1 and the connection part 2 are straight rod or straight plate structures.

[0016] Furthermore, the shape of the hook bend of each clamping and fixing hook is substantially consistent with the edge bend of the rib, and the fixing space constructed by the two connecting parts and the two groups of fixing hooks is substantially consistent with the shape of the rib.

[0017] Furthermore, the connecting part and the clamping and fixing hook are both plate-shaped structures; this structure can ensure a better clamping and fixing effect.

[0018] Furthermore, the locking protrusion contains a guiding rotation inclined surface 1 and an anti-reversal inclined surface 1, and correspondingly, a guiding rotation inclined surface 2 and an anti-rotation inclined surface 2 corresponding to the guiding rotation inclined surface are arranged on the single locking tooth; and a rectangular notch allowing deformation and a receiving groove for accommodating the locking protrusion are arranged between the two locking teeth, and the receiving groove is surrounded by the anti-reversal inclined surface 2 of the previous locking tooth and the guiding rotation inclined surface 2 on the locking tooth; when the locking protrusion enters another receiving groove from one receiving groove, the position is adjusted, and the adjustment is achieved by guiding the rotation action by the guiding rotation inclined surface 1 and the guiding rotation inclined surface 2, and the locking of the adjusted position is ensured by the cooperation of the anti-reversal inclined surface 2 in the receiving groove and the anti-reversal inclined surface 1 of the locking protrusion, thereby achieving a self-locking technical effect.

[0019] Alternatively, the locking protrusion is an inclined elastic piece arranged on a cylindrical protrusion structure or a circular ring structure with a cylindrical hole groove, and a locking tooth has a guide surface and an anti-reversal surface; there is an accommodating groove between the two locking teeth, and the inclined elastic piece moves on the guide surface for adjustment, and when the inclined elastic piece reaches the accommodating groove between the two locking teeth, the anti-reversal surface prevents the inclined elastic piece from reversing.

[0020] Furthermore, in order to achieve an effective combination of the rotation locking part, the following implementation is adopted: a through arc groove for accommodating the circular ring structure is provided on the connecting part, and the circular ring structure rotates in the arc groove. The rotation action can be well stabilized by providing the arc groove; a more preferred implementation is that an anti-slip protruding plate is provided at the bottom of the circular ring structure, and an anti-slip groove for accommodating the anti-slip protruding plate is provided on the arc groove. Two anti-slip protruding plates are provided symmetrically at the center; two anti-slip grooves are provided in the arc grooves on both sides; this arrangement can cooperate with the rotation locking part to ensure the stability of the structure.

[0021] Furthermore, if the connection part one and the connection part two are effectively combined in vitro, the time for entering the body for combination through a minimally invasive method will be greatly reduced. Therefore, it is necessary to effectively combine the connection part one and the connection part two and maintain a relatively stable combination state. The following method is adopted: the anti-slip protrusion plate is an arc plate, and the curvature of the arc plate is A°; the curvature of the connection part between the connection part one and the arc groove is B°, and the curvature of the connection part between the connection part two and the circular ring structure is C°; the arc plate contacts the connection part two; A≤180-BC; wherein A=B=C is preferably 60°; when combining, the connection part one and the connection part two are socketed and combined in an area where no arc plate is provided, and in the initial combination position, the locking protrusion is inserted into the first arc groove constructed by the locking tooth, and then after rotating an angle of the locking tooth, the anti-slip protrusion plate enters the anti-slip groove, thereby realizing the anti-slip combination of the connection part one and the connection part two, and constructing a fixing device in the entry state.

[0022] Furthermore, two locking protrusions are provided, and two groups of locking teeth are provided correspondingly; the circumferential array angle of the locking teeth is not less than the curvature of the arc plate; the purpose of this arrangement is to ensure that the rotation is completed within a suitable rotation range.

[0023] Furthermore, because the fixation device is relatively small as a whole and is completed under minimally invasive conditions, the rotation of connection part one and connection part two cannot be completed by fingers, and needs to be completed with the help of special operating instruments. Therefore, it is necessary to provide corresponding structures that are compatible with the operating instruments on connection part one and connection part two. Specifically, an operating adaptation structure one is provided on the circular ring structure, and an operating matching structure two is provided on the cylindrical protruding structure. The two operating structures are provided on the operating adaptation structure one and the operating matching structure two to control the rotation of the rotation locking structure.

[0024] Furthermore, at least one outward-facing notch is provided at the corresponding part of the outer edge of the circular ring structure where the locking teeth are not provided, and the notch is composed of two vertical planes. All the notches and the outer edge of the circular ring structure construct a non-circular operation adaptation structure 1; the operation adaptation structure 2 is a non-circular groove provided in the cylindrical protruding structure, which can be a regular polygonal groove; the operation structure 1 adapted to the operation adaptation structure 1 and the operation adaptation structure 2 adapted to the operation adaptation structure 2 are provided accordingly, the operation structure 2 is a sleeve structure, and the first end of the sleeve structure is provided with a structure that is sleeved on the outside of the operation adaptation structure 1; the operation structure 2 is provided on the inner side of the operation structure 1, and the operation structure 2 is longer than the operation structure 1; and an insertion structure that can be inserted into the non-circular groove is provided on the first end of the operation structure 2.

[0025] Furthermore, because the entire operation is a minimally invasive operation, many operations are best performed outside the body, because once the operation enters the body, it will become much more difficult. Therefore, if the operation structure and the fixing device can be fixed together outside the body and enter together, it will greatly reduce the difficulty of the operation and save the operation time. The specific implementation method is to set a structure for fixing the operation structure 1 and the operation structure 2 on the fixing device without affecting the mutual rotation of the operation structure 1 and the operation structure 2, specifically, a threaded hole is set in the non-circular groove; and the operation structure 3 is set accordingly, and the operation structure 3 is set on the threaded rod inserted into the threaded hole; the operation structure 1 and the operation structure 2 are both cylindrical structures, the operation structure 2 is set in the operation structure 1, and the operation structure 3 is set in the operation structure 2, and the threaded rod of the operation structure 3 is combined with the threaded hole, and the operation structures 1 to 3 are combined with the fixing device, and a limit ring is set at the second end of the operation structure 2 to limit the movement of the operation structure 1 and the operation structure 2 in the longitudinal axis direction after the combination, and a limit cap is set at the second end of the operation structure 3 to limit the movement of the operation structure 2 and the operation structure 3 in the longitudinal axis direction after the combination.

[0026] Beneficial effects of the present invention:

[0027] By cross-arranging a connection part 1 and a connection part 2 that connect two groups of fixing hook groups, and arranging a rotation locking part with a self-locking effect at the intersection of the connection part 1 and the connection part 2, it can be ensured that the fixing device is delivered to the rib position through a small incision with a small distance between the two groups of fixing hooks, and can be directly placed on the rib, and through the rotation self-locking method, the two clamping fixing hooks of each group of fixing hooks are close to clamp one side of the rib fracture, and the two groups can complete the fixation of the positions on both sides, thereby realizing effective fixation of the rib fracture.

[0028] The distance between the two sets of fixing hooks in the clamping and fixing state is L, and L is less than 2 cm. The smaller length can ensure that the clamping space constructed by the four fixing hooks is consistent with the spatial shape of the ribs in a shorter range, thereby ensuring the effectiveness of the clamping and not affecting the rib fixation due to rib bending.

[0029] When assembling, the connection part one and the connection part two are socketed and assembled in the area where the arc plate is not set. In the initial assembly position, the locking protrusion is inserted into the first accommodating groove constructed by the locking tooth, and then after rotating an angle of the locking tooth, the anti-slip protrusion plate enters the anti-slip groove, so that the effect of not being able to rotate back and not being able to separate up and down after assembly is achieved, thereby constructing a very stable and effective combination entry state. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the fixing device in the entry state of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the fixing device in the clamping state of the present invention;

[0032] Figure 3 It is a schematic diagram of the main structure of the connecting part of the fixing device of the present invention;

[0033] Figure 4 It is a top view of the structure of the connecting part of the fixing device of the present invention;

[0034] Figure 5 It is a schematic diagram of the main structure of the connecting part of the fixing device of the present invention;

[0035] Figure 6 It is a top view of the second connecting part of the fixing device of the present invention;

[0036] Figure 7 It is a partial enlarged structural schematic diagram of the locking protrusion and the locking tooth of the present invention;

[0037] Figure 8 It is a schematic diagram of the combined structure of various operating structures and fixing devices of the present invention;

[0038] Fig. 9 It is a schematic diagram of the combined state structure of various operation structures of the present invention;

[0039] Fig.10 It is a schematic diagram of the longitudinal cross-section structure of the combined state of various operating structures of the present invention;

[0040] Fig.11 It is a schematic diagram of the longitudinal cross-sectional structure of the second gripping structure of the present invention;

[0041] Fig.12 It is a structural schematic diagram of the operating structure of the present invention;

[0042] Fig.13 It is a longitudinal cross-sectional structural schematic diagram of the operating structure of the present invention;

[0043] Fig.14This is a schematic diagram of the second operating structure of the present invention;

[0044] Fig.15 It is a schematic diagram of the third structure of the operating structure of the present invention;

[0045] Fig.16 It is a partially enlarged cross-sectional structural schematic diagram of an embodiment of the present invention in which the locking projection can be retracted;

[0046] Fig.17 This is a schematic diagram of the structure of a fixing device provided with anti-slip protrusions according to the present invention;

[0047] Fig.18 A schematic diagram of the structure of the fixing device of the present invention for setting the rib position;

[0048] Description of main reference numerals

[0049] 1. Fixing hook assembly; 11. Clamping and fixing hook; 21. Connection part 1; 22. Connection part 2; 31. Cylindrical protruding structure; 32. Circular ring structure; 33. Locking protrusion; 331. Guide rotation inclined plane 1; 332. Prevent reverse inclined plane 1; 34. Locking tooth; 341. Guide rotation inclined plane 2; 342. Prevent rotation inclined plane 2; 343. Rectangular notch; 344. Accommodating groove; 35. Arc groove; 36. Anti-slip protruding plate; 37. Anti-slip groove; 41. Notch; 42. Non-circular groove; 43. Threaded hole; 51. Operation structure one; 511. Holding structure one; 512. Short insertion rod; 52. Operation structure two; 521. Insertion structure; 522. Holding structure two; 5221. Non-circular hole; 5222. Limit hole; 523. Limit ring; 524. Non-circular cap; 53. Operation structure three; 531. Threaded rod; 532. Limit cap; 61. Storage slot; 62. Elastic structure; 63. Rotating shaft; 641. Limit block; 642. Limit column; 65. Pull rope; 66. Adjustment hole; 7. Anti-slip protrusion. DETAILED DESCRIPTION

[0050] refer to Figure 1-6 , Fig.18; The present invention constructs a technical solution of rotation adjustment and simultaneous locking of the fixed position during rotation adjustment through the idea of ​​cross-arranged connecting part 1 21 and connecting part 2 22 that connect two groups of fixing hook groups 1. The specific technical solution is: a self-locking rotatable rib fracture fixation instrument under laparoscopic surgery, which includes: 4 clamping and fixing hooks 11; 2 cross-arranged connecting parts, the two connecting parts are respectively connecting part 1 21 and connecting part 22; a clamping and fixing hook 11 is arranged at both ends of each connecting part, and the cross-arrangement of the two connecting parts makes the four clamping and fixing hooks 11 constitute two pairs of fixing hook groups 1 with hooks facing opposite directions for clamping and fixing ribs, and the two clamping and fixing hooks 11 of each group of fixing hook groups 1 are one at the end of connecting part 1 21 and the other at the end of connecting part 22; it also includes a rotation locking part, which is arranged at the intersection position between the two connecting parts, and the rotation adjustment angle between the two connecting parts is achieved by the rotation locking part. The rotation locking part includes a cylindrical protruding structure 31, which is arranged at the connecting part The first connecting portion 21 is disposed in the middle of the connecting portion 21 and is integrally connected to the first connecting portion 21; a ring structure 32 with a cylindrical hole groove, which is disposed in the middle of the second connecting portion 22 and is integrally connected to the second connecting portion 22, and the cylindrical protruding structure 31 extends into the cylindrical hole groove to realize the cross combination of the first connecting portion 21 and the second connecting portion 22; and a locking protrusion 33 and a plurality of locking teeth 34 arranged in a circumferential array, the locking protrusion 33 is disposed on the outer wall of the cylindrical protruding structure 31 or the inner wall of the cylindrical hole groove, and the corresponding locking teeth 34 are disposed on the inner wall of the cylindrical hole groove Or on the outer wall of the cylindrical protruding structure 31, the locking protrusion 33 and the locking tooth 34 cooperate to only allow the cylindrical protruding structure 31 to rotate in one direction in the cylindrical hole groove without reversing. In this way, the connecting part 1 21 and the connecting part 2 22 rotate in a single direction along with the rotating locking part. The rotation in a single direction makes the two clamping fixing hooks 11 of each set of fixing hooks 1 relatively close, and at the same time, the locking protrusion 33 enters the position between the corresponding two locking teeth 34, locking the rotation action of the connecting part 1 21 and the connecting part 2 22.

[0051] The above-mentioned instrument realizes the cross-combination of the connecting part 1 21 and the connecting part 2 22 by extending the cylindrical protruding structure 31 into the cylindrical hole groove, and the ring structure 32 with the cylindrical hole groove rotates around the cylindrical protruding structure 31 to realize the rotation of the connecting part 1 21 and the connecting part 2 22, and at the same time realizes the two clamping fixing hooks 11 of each group of fixing hook groups 1 to move relatively close to each other, until the two clamping fixing hooks 11 of each group are relatively close to the two sides of the fractured rib, one group of fixing hook groups 1 is fixed on one side of the rib fracture surface, and the other group of fixing hook groups 1 is fixed on the other side of the rib fracture surface. After effective close contact, the locking protrusion 33 enters between the corresponding two locking teeth 34. After close contact, the connecting part 1 21 and the connecting part 2 22 no longer loosen and rotate in the opposite direction at the same time, which naturally achieves the purpose of the two groups of fixing hook groups 1 to firmly fix the ribs, and achieves the position locking while rotating, which is a good purpose of rib fixation.

[0052] A more preferred embodiment is that the rotation locking part is arranged in the middle of the connection part 1 21 and the connection part 2 22, and the two clamping and fixing hooks 11 on each connection part are symmetrical with the rotation locking part as the center; the two groups of fixing hook groups 1 exist in two states, one is the entry state, and the other is the clamping and fixing state. In the entry state, the spacing distance between the two clamping and fixing hooks 11 of each group of fixing hook groups 1 is greater than the rib width, and the distance between the two clamping and fixing hooks 11 on the same side of the two groups of fixing hook groups 1 in the clamping and fixing state is L, and L is less than 2cm. In this way, the clamping space constructed by the four fixing hooks is basically consistent with the shape of the outer side of the ribs in a shorter range, and the rib fixation will not be affected by the bending of the ribs in the constructed straight space. In addition, this small size can also meet the needs of minimally invasive surgery. More preferably, the connection part 1 21 and the connection part 2 22 are both straight rods or straight plate structures.

[0053] Alternatively, the connection part 1 21 and the connection part 2 22 are set to corresponding curved structures according to the curvature of the ribs. This setting can ensure that the curvature is set as needed, but this type of structure is prepared by 3D printing according to the patient's condition; to ensure effective anastomosis and fixation effects.

[0054] A more preferred embodiment is that the shape of the hook bend position of each clamping fixing hook 11 is basically consistent with the edge bend of the rib, and the fixing space constructed by the two connecting parts and the two groups of fixing hook groups 1 is basically consistent with the shape of the rib. This method can ensure the fit of each part during fixation and avoid shaking during the fixation process.

[0055] In a more preferred embodiment, both the connecting portion and the clamping and fixing hook 11 are plate-shaped structures; this structure can ensure a better clamping and fixing effect.

[0056] When in use, the distance between the two clamping and fixing hooks 11 on the same side of the two groups of fixing hook groups 1 in the entry state is small, and the distance between the two clamping and fixing hooks 11 in the same group is large, which can ensure that the entire instrument enters the surgical position through a smaller incision, and can achieve minimally invasive insertion. In this state, the spacing distance between the two clamping and fixing hooks 11 of the same group of fixing hook groups 1 is greater than the rib width. This arrangement can ensure that the instrument falls into the fractured rib, the connecting part is above the rib, and the lower hook edge of the clamping and fixing hook 11 is arranged above the rib; after entering, the instrument is adjusted from the entry state to the fixed state by adjusting the rotating locking part, and the distance between the fixing hooks in the fixed state becomes larger, but the spacing distance between the two clamping and fixing hooks 11 of the same group of fixing hook groups 1 is equal to the rib width, so that the two clamping and fixing hooks 11 of the same group of fixing hook groups 1 are close to the rib, and the rib is clamped and fixed, and the two fixing hook groups 1 are respectively arranged on both sides of the rib fracture surface, and this operation is also completed under the observation of the thoracoscope, which can further ensure that the incision of the entire operation is small and the patient recovers quickly.

[0057] In one embodiment, reference Figure 6-7 The locking protrusion 33 and the locking tooth 34 may be arranged in such a manner that: the locking protrusion 33 includes a first guiding rotation inclined surface 331 and a first anti-reversal inclined surface 332, and a second guiding rotation inclined surface 341 and a second anti-reversal inclined surface 342 corresponding to the guiding rotation inclined surface are arranged on a single locking tooth 34; and a rectangular notch 343 allowing deformation and a receiving groove 344 for receiving the locking protrusion 33 are arranged between the two locking teeth 34, and the receiving groove 344 is composed of a second anti-reversal inclined surface 34 on the two locking teeth 34 and a guiding rotation inclined surface 341 and a second anti-reversal inclined surface 342. The locking protrusion 33 is surrounded by a second rotating bevel 341; when the locking protrusion 33 enters another accommodating groove 344 from one accommodating groove 344, the position is adjusted. The adjustment is achieved by guiding the rotating bevel 1 331 and the guiding rotating bevel 2 341 to guide the rotating action. The locking of the adjusted position is ensured by the cooperation of the second anti-reversal inclined surface 341 in the accommodating groove 344 and the anti-reversal inclined surface 1 of the locking protrusion 33, thereby achieving a self-locking technical effect, which can reduce the difficulty of adjustment and operation, and can ensure that the clamping and fixing hook 11 effectively fixes the ribs without repetition.

[0058] Alternatively, the locking protrusion 33 is an inclined elastic piece arranged on a cylindrical protruding structure 31 or a circular ring structure 32 with a cylindrical hole groove, and a locking tooth 34 has a guiding surface and an anti-reversal surface; there is a receiving groove 344 between the two locking teeth 34, and the inclined elastic piece moves on the guiding surface for adjustment. When the inclined elastic piece reaches the receiving groove 344 between the two locking teeth 34, the anti-reversal surface prevents the inclined elastic piece from reversing (not shown in the figure).

[0059] A more preferred embodiment is that a through arc groove 35 for accommodating the circular ring structure 32 is provided on the connecting part 1 21, and the circular ring structure 32 rotates in the arc groove 35. The arc groove 35 can be provided to stabilize the rotation action well; a more preferred embodiment is that an anti-slip protruding plate 36 is provided at the bottom of the circular ring structure 32, and an anti-slip groove 37 for accommodating the anti-slip protruding plate 36 is provided on the arc groove 35. Two anti-slip protruding plates are provided symmetrically at the center; two anti-slip grooves 37 are provided in the arc grooves 35 on both sides; this arrangement can cooperate with the rotation locking part to ensure the stability of the structure.

[0060] A more preferred embodiment is that the anti-slip protrusion plate 36 is an arc plate, and the curvature of the arc plate is A°; the curvature of the part where the connecting part 21 is connected to the arc groove 35 is B°, and the curvature of the part where the connecting part 22 is connected to the circular ring structure 32 is C°; the arc plate contacts the connecting part 22; A≤180-BC; wherein A=B=C is preferably 60°; when combined, the connecting part 1 21 and the connecting part 2 22 are socketed and combined in an area where no arc plate is provided, and in the initial combined position, the locking protrusion 33 is inserted into the first arc groove 35 constructed by the locking tooth 34, and then after rotating an angle of the locking tooth 34, the anti-slip protrusion plate 36 enters the anti-slip groove 37, thereby realizing the anti-slip combination of the connecting part 1 21 and the connecting part 2 22, and constructing a fixing device in the entered state. The fixing device in the entry state constructed in this way is in a slender state, and the surgical incision required for entry in this state is minimal. The fixing device in this state is in an effective combination position, which can combine the locking protrusion 33 with the locking tooth 34, and the anti-slipping publication with the anti-slipping groove 37, so as to achieve the effect of not being able to rotate back and not being able to separate up and down, which is a very stable and effective entry state. The combination state structure is effectively constructed from the outside of the body, avoiding the difficulty of combination after entering the ribs.

[0061] A more preferred embodiment is to provide two locking protrusions 33 and correspondingly provide two groups of locking teeth 34; the circumferential array angle of the locking teeth 34 is not less than the curvature of the arc plate; the purpose of this arrangement is to ensure that the rotation is completed within a suitable rotation range.

[0062] A more preferred embodiment is to refer to Figure 8-15; Because the fixation device is relatively small as a whole and is completed under minimally invasive conditions, the rotation of the connection part 1 21 and the connection part 2 22 cannot be completed by fingers, and it needs to be completed with the help of a special operating device. Therefore, it is necessary to set a corresponding structure that is adapted to the operating device on the connection part 1 21 and the connection part 2 22. Specifically, an operating adaptation structure 1 is set on the ring structure 32, and an operating matching structure 2 is set on the cylindrical protruding structure 31. The two operating structures are set on the operating adaptation structure 1 and the operating matching structure 2 to control the rotation of the rotation locking structure; more specifically, at least one notch 41 facing outward is set at the corresponding part of the outer edge of the ring structure 32 where the locking tooth 34 is not set. The notch 41 is composed of two vertical planes, and all the notches 41 and the outer edge of the circular ring structure 32 construct a non-circular operation adaptation structure one; the operation adaptation structure two is a non-circular groove 42 set in the cylindrical protrusion structure 31, which can be a regular polygonal groove; correspondingly, an operation structure one 51 adapted to the operation adaptation structure one and an operation structure two 52 adapted to the operation adaptation structure two are set, the operation structure one 51 is a sleeve structure, and the first end of the sleeve structure is provided with a structure that is sleeved on the outside of the operation adaptation structure one; the operation structure two 52 is set on the inner side of the operation structure one 51, and the operation structure two 52 is longer than the operation structure one 51; and the first end of the operation structure two 52 is provided with an insertion structure 521 that can be inserted into the non-circular groove 42. When in use, the operation structure 1 51 is sleeved onto the outside of the circular ring structure 32 and engaged with the operation adapter structure 1, and the deep structure of the operation structure 2 52 is set in the non-circular groove 42, and the operation structure 1 51 or the operation structure 2 52 is controlled to be immobile, and the other one rotates in the accurate rotation direction. When relative rotation can no longer occur, the rotation stops, and the operation structure 1 51 and the operation structure 2 52 are withdrawn. The second end of the operation structure 1 51 is provided with a handle extending outward for easy operation or an enlarged gripping structure 1 511 whose longitudinal axis is consistent with the longitudinal axis of the operation structure 1 51 for easy operation; the second end of the operation structure 2 52 is provided with an enlarged gripping structure 2 522 whose longitudinal axis is consistent with the longitudinal axis of the operation structure 1 51 for easy operation. More specifically, the first end of the holding structure 1 511 is a transition part and the second end is a cylindrical part 1, the length of the cylindrical part 1 is less than 1 cm, and the holding structure 2 522 includes a transition part at the first end and a cylindrical part 2 at the second end, and the length of the cylindrical part 2 is greater than 7 cm; the above arrangement can facilitate holding the holding structure 1 511 with one hand and holding the holding structure 2 522 with the other hand, so as to facilitate the use of force when the two hands rotate relative to each other. More specifically, a longitudinal depression or protrusion is arranged on the outer side of the cylindrical part 2, so as to increase the friction during operation. In a more preferred embodiment, in order to improve the adaptability of the operating structure 1 51 and the circular ring structure 32, two short plug rods 512 are extended from the first end of the operating structure 1 51, and in the use state, the short plug rods 512 are inserted into both sides of the circular ring structure 32 and contact the connecting part; in this way, the adaptability effect and the position maintenance state can be improved.

[0063] In a more preferred embodiment, the fixation device is entirely made of absorbable material. This arrangement can avoid removal after surgery and reduce secondary damage to the patient.

[0064] A more preferred embodiment is as follows: Fig.17 The anti-skid protrusion 7 is arranged on the connecting part and the inner side of the clamping and fixing hook, that is, the side contacting the bone surface, to further improve the stability of the fixing position; the anti-skid protrusion 7 is arranged as a pyramid-shaped pointed cone structure. This arrangement allows the tip of the anti-skid protrusion 7 to be inserted into the rib, thereby increasing the gripping force and further ensuring the stability of the structure after fixation.

[0065] refer to Figure 10-14The entire operation is a minimally invasive surgery, and many operations are best performed outside the body, because once inside the body, the operation will become much more difficult. Therefore, if the operating structure and the fixing device can be combined and fixed together outside the body and enter together, it will greatly reduce the difficulty of the operation and save operation time. The specific implementation method is as follows: a device is provided for fixing and combining the operating structure 1 51 and the operating structure 2 52 on the fixing device without affecting the mutual rotation structure of the operating structure 1 51 and the operating structure 2 52, specifically, a threaded hole 43 is provided in the non-circular groove 42; and an operating structure 3 53 is provided correspondingly, and a threaded rod 531 inserted into the threaded hole 43 is provided on the operating structure 3 53; the operating structure 1 51 and the operating structure 2 52 are both cylindrical structures, the operating structure 2 52 is provided in the operating structure 1 51, and the operating structure 3 53 is provided in the operating structure 2 52, the threaded rod 531 of the operating structure 3 53 is combined with the threaded hole 43, the operating structures 1 51 to 3 are combined with the fixing device, a limiting ring 523 is provided at the second end of the operating structure 2 52, which is used to limit the movement of the operating structure 1 51 and the operating structure 2 52 in the longitudinal axis direction after the combination, and a limiting cap 532 is provided at the second end of the operating structure 3 53, which is used to limit the movement of the operating structure 2 52 and the operating structure 3 53 in the longitudinal axis direction after the combination. When in use, firstly adapt the operating structure 1 51 to the operating adapter structure 1, then extend the operating structure 2 52 into the operating structure 1 51, and insert the extending structure 521 of the first end of the operating structure into the non-circular groove 42, and then rotate the threaded rod 531 of the operating structure 3 53 into the threaded hole 43. Due to the accurate setting of the limiting ring 523 and the limiting cap 532, it can ensure that the operating structure 1 51 to the three relative fixed instruments are not separated, and the rotation adjustment of the rotation locking part can be achieved through the relative rotation of the operating structure 1 51 and the operating structure. A more preferred embodiment is that a non-circular cap 524 is further provided at the second end of the operating structure 2 52, and a channel for the operating structure 3 53 to extend into is provided on the non-circular cap 524, a non-circular hole 5221 adapted to the non-circular cap 524 is provided on the holding structure 2 522, and a limiting hole 5222 for accommodating the limiting cap 532 is also provided in the holding structure 2 522; the non-circular cap 524 is combined with the holding structure 2 522, and the limiting cap 532 is arranged in the holding structure. This arrangement can shorten the distance of the operating structure 3 53 and avoid affecting the strength of the operating structure 3 53 due to the large distance; the control of the operating structure 2 52 is achieved by rotating the holding structure 2 522 in a multi-section assembly and matching manner.

[0066] A more preferred embodiment is to refer to Fig.16; In order to avoid the occurrence of unexpected situations in which the clamping position of the fixing hook group 1 cannot be adjusted after being fixed, resulting in inappropriate fixation of the rib fracture, the locking protrusion 33 is set to a structure that can be retracted into the cylindrical protrusion structure 31; specifically, a receiving groove 61 is provided on the cylindrical protrusion structure 31, and the locking protrusion 33 is combined with the side wall of the receiving groove 61 through an elastic structure 62. Under normal conditions, the locking protrusion 33 extends out under the elastic action of the elastic structure 62 to complete self-locking. When it is necessary to retract and adjust, the locking protrusion 33 is pushed or pulled into the receiving groove 61 with the help of a tool, and the rib is retracted to be fixed again. A more specific implementation is as follows: the first end of the locking protrusion 33 extends from the cylindrical protrusion structure 31, and a limit block 641 at the edge and a limit column 642 at the middle position are arranged in the storage groove 61. The second end of the locking protrusion 33 moves between the limit block 641 and the limit column 642. A rotating shaft 63 is arranged in the middle of the locking protrusion 33. The extension and retraction of the first end of the locking protrusion 33 into the storage groove 61 are controlled by the rotating shaft 63, and the first end moves within a suitable range by limiting the second end. In a more specific manner, a pulling rope 65 is connected to the first end of the locking protrusion 33, and a tethering structure is provided. By rotating the tethering structure, the pulling rope 65 is wound around the tethering structure to realize the first end of the locking protrusion 33 being retracted into the receiving groove 61, and the fixed fixing device is loosened; further, the pulling ropes 65 of the two locking protrusions 33 are arranged on a tethering structure, and the pulling ropes 65 are fixedly arranged at different positions of the tethering structure to ensure that the pulling ropes 65 at the two positions are wound by rotating in the same direction, and the purpose of storing the two locking protrusions 33 into the receiving groove 61 is achieved. An adjustment hole 66 is provided on the tethering structure, and an operating structure 4 is extended from the outside. By extending the operating structure 4 into the adjustment hole 66, the tethering structure is rotated to achieve the purpose of winding the pulling rope 65. The hole of the pulling rope 65 is set in the hole inside the cylindrical protruding structure 31, and the tethering structure is also hidden inside the cylindrical protruding structure 31. This arrangement does not increase the space of each structure.

[0067] The technical solutions in the embodiments of the present invention are clearly and completely described above through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A self-locking rotatable rib fracture fixation device for laparoscopic surgery, comprising: Clamping and fixing hooks, 4 pieces are provided; There are two connecting parts, namely, connecting part 1 and connecting part 2; one clamping and fixing hook is set at both ends of each connecting part, and the two connecting parts are arranged crosswise, so that the four clamping and fixing hooks are constructed into two pairs of fixing hook groups with hooks facing oppositely for clamping and fixing the ribs, and the two clamping and fixing hooks of each fixing hook group are one at one end of the connecting part and the other at the other end of the connecting part; The rotation locking part is arranged at the intersection between the two connecting parts, and the rotation adjustment angle between the two connecting parts is achieved by the rotation locking part. The rotation locking part includes A cylindrical protruding structure is disposed in the middle of the connecting portion 1 and is integrally connected to the connecting portion 1; The annular structure with a cylindrical hole groove is arranged in the middle of the second connecting part and is integrally connected with the second connecting part, and the cylindrical protruding structure extends into the cylindrical hole groove to realize the cross combination of the first connecting part and the second connecting part; A locking protrusion and a plurality of locking teeth arranged in a circumferential array, wherein the locking protrusion is arranged on the outer wall of the cylindrical protruding structure or the inner wall of the cylindrical hole groove, and the corresponding locking teeth are arranged on the inner wall of the cylindrical hole groove or the outer wall of the cylindrical protruding structure. The locking protrusion cooperates with the locking teeth to only allow the cylindrical protruding structure to rotate in one direction in the cylindrical hole groove. Among them, the connection part one and the connection part two rotate in a single direction along with the rotating locking part. The rotation in a single direction makes the two clamping fixing hooks of each group of fixing hooks relatively close to each other, and at the same time the locking protrusion enters the corresponding locking tooth position to lock the position of the connection part one and the connection part two.

2. The fixing device according to claim 1, characterized in that: The rotating locking part is arranged in the middle of the connecting part 1 and the connecting part 2, and the two clamping and fixing hooks on each connecting part are symmetrical with the rotating locking part as the center; the rotating locking part has a clamping and fixing state, and the distance between the two clamping and fixing hooks on the same side of the two sets of fixing hooks in the clamping and fixing state is L, and L is less than 2cm. The connecting part and the clamping and fixing hook are both plate-shaped structures.

3. The fixing device according to claim 1, characterized in that: The shape of the hook bend position of each clamping fixing hook is basically consistent with the edge curvature of the rib, and the fixing space constructed by the two connecting parts and the two groups of fixing hooks is basically consistent with the shape of the rib.

4. The fixing device according to claim 1, characterized in that: The locking protrusion has a first guiding rotation inclined surface and a first anti-reversal inclined surface, and a second guiding rotation inclined surface and a second anti-reversal inclined surface corresponding to the guiding rotation inclined surface are provided on a single locking tooth; and a rectangular notch allowing deformation and a receiving groove for receiving the locking protrusion are provided between the two locking teeth, and the receiving groove is surrounded by the second anti-reversal inclined surface of the previous locking tooth and the second guiding rotation inclined surface on the locking tooth; when the locking protrusion enters another receiving groove from one receiving groove, the position adjustment is realized; Alternatively, the locking protrusion is an inclined elastic piece arranged on a cylindrical protrusion structure or a circular ring structure with a cylindrical hole groove, and a locking tooth has a guide surface and an anti-reversal surface; there is an accommodating groove between the two locking teeth, and the inclined elastic piece moves on the guide surface for adjustment, and when the inclined elastic piece reaches the accommodating groove between the two locking teeth, the anti-reversal surface prevents the inclined elastic piece from reversing.

5. The fixing device according to claim 1, characterized in that: The connecting part 1 is provided with a penetrating arc groove for accommodating the circular ring structure, and the circular ring structure rotates in the arc groove; An anti-dropout protruding plate is arranged at the bottom of the circular ring structure, and an anti-dropout groove for accommodating the anti-dropout protruding plate is correspondingly opened on the arc groove; Two anti-slip protruding plates are centrally symmetrically arranged; and two anti-slip grooves are correspondingly arranged in the arc grooves on both sides.

6. The fixing device according to claim 5, characterized in that: The anti-slip protruding plate is an arc-shaped plate, the arc of the arc-shaped plate is A°, the arc of the connecting part of the connecting part one and the arc-shaped groove is B°, and the arc of the connecting part of the connecting part two and the circular ring structure is C°; the arc-shaped plate contacts the connecting part two; A≤180-BC; when assembling, the connecting part one and the connecting part two are socketed and combined in the area where the arc-shaped plate is not set, and in the initial combined position, the locking protrusion is inserted into the first arc-shaped groove constructed by the locking tooth, and then after rotating an angle of the locking tooth, the anti-slip protruding plate enters the anti-slip groove.

7. The fixing device according to claim 6, characterized in that: Two locking protrusions are provided, and two groups of locking teeth are provided correspondingly; the circumferential array angle of the locking teeth is not less than the curvature of the arc plate.

8. The fixing device according to claim 1, characterized in that: An operation adapting structure 1 is arranged on the circular ring structure, an operation matching structure 2 is arranged on the cylindrical protruding structure, and two other operation structures are arranged correspondingly. The two operation structures are arranged on the operation adapting structure 1 and the operation matching structure 2 to control the rotation locking structure to rotate.

9. The fixing device according to claim 8, characterized in that: At least one outward-facing notch is provided at the corresponding part of the outer edge of the circular ring structure where no locking teeth are provided, and the notch is composed of two vertical planes, and all the notches and the outer edge of the circular ring structure construct a non-circular operation adaptation structure 1; the operation adaptation structure 2 is a non-circular groove provided in the cylindrical protruding structure; the operation structure 1 adapted to the operation adaptation structure 1 and the operation adaptation structure 2 adapted to the operation adaptation structure 2 are provided correspondingly, the operation structure 2 is a sleeve structure, and the first end of the sleeve structure is provided with a structure that is sleeved on the outside of the operation adaptation structure 1; the operation structure 2 is provided on the inner side of the operation structure 1, and the operation structure 2 is longer than the operation structure 1; and the first end of the operation structure 2 is provided with an insertion structure that can be inserted into the non-circular groove.

10. The fixing device according to claim 9, characterized in that: A threaded hole is set in the non-circular groove; and an operating structure three is set accordingly, and a threaded rod inserted into the threaded hole is set on the operating structure three; the operating structure one and the operating structure two are both cylindrical structures, the operating structure two is set in the operating structure one, and the operating structure three is set in the operating structure two, the threaded rod of the operating structure three is combined with the threaded hole, the operating structures one to three are combined with the fixing device, and a limiting ring is set at the second end of the operating structure two to limit the movement of the operating structure one and the operating structure two in the longitudinal axis direction after the combination, and a limiting cap is set at the second end of the operating structure three to limit the movement of the operating structure two and the operating structure three in the longitudinal axis direction after the combination.

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