Flap retractor for artificial cochlea electrode implantation operation

Abstract

The invention discloses a flap retracting device for an artificial cochlea electrode implantation operation. The flap retracting device comprises a pressing piece, a distraction assembly and a connecting assembly. The front end of the pressing piece and the front end of the opening assembly are movably connected through the connecting assembly so that the pressing piece and the opening assembly can rotate around the same rotating shaft, and then the included angle between the pressing piece and the opening assembly can be adjusted according to needs. The flap retractor further comprises a switch assembly, the switch assembly is used for controlling adjustment of an included angle between the pressing piece and the distraction assembly, when the switch assembly is in an open state, the included angle between the pressing piece and the distraction assembly can be adjusted, and when the switch assembly is in a closed state, the included angle between the pressing piece and the distraction assembly remains unchanged. According to the flap retractor, flaps around an incision are pulled open through the pressing part of the pressing part and the distraction fork-shaped part of the distraction assembly, the traction effect of the flap retractor is better than that of a drag hook, and therefore the surgical operation space and the surgical view can be enlarged.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a flap retraction device used in cochlear implant electrode implantation surgery. Background Art

[0002] At present, the cochlear implant electrode implantation surgery requires cutting the skin behind the patient's ear, and then using a drill to grind away part of the patient's skull bone, thereby grinding out a groove (i.e., bone groove) on the skull that can be used to place the cochlear implant's receiver / stimulator. Since the surgical cavity of this type of surgery is relatively deep, during the operation, medical staff usually need to use a retractor to manually pull the skin flaps (i.e., skin, muscle, and soft tissue) around the incision in different directions, in order to remove all the skin flaps around the incision and expose the skull here so that medical staff can perform the operation.

[0003] However, the above method of manually pulling the skin flap around the incision with a retractor has the following defects and shortcomings:

[0004] First, simply using retractors to pull the skin flap in different directions can easily result in the skin flap around the incision not being fully pulled open, which in turn results in very small surgical operating space and surgical field of view;

[0005] Second, the manual traction method is used, which makes the operation time-consuming and laborious for medical staff, and the state of the flap being pulled apart is unstable;

[0006] Third, because the surgical field of view is very small and the flap is not in an stable state when being pulled apart, medical staff may accidentally touch and wear the soft tissue around the incision when grinding the skull with a drill, causing unnecessary damage to the soft tissue. The drill may also accidentally touch the retractor, causing damage to the drill.

[0007] Fourth, manual traction is prone to excessive traction, which may cause the patient's position to be moved, affecting the surgical operation and progress.

[0008] In view of the above problems, the existing flap retraction device and method for cochlear implant electrode implant surgery virtually increase the difficulty and risk of the surgery and greatly affect the efficiency and progress of the surgery. Therefore, how to develop a new flap retraction device for cochlear implant electrode implant surgery to overcome the above defects and deficiencies of the prior art has become a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a flap retraction device for cochlear implant electrode implantation surgery to overcome the above-mentioned defects and shortcomings of the prior art.

[0010] In order to solve the above technical problems, the invention adopts the following technical solutions:

[0011] Provided is a flap retraction device for cochlear implant electrode implantation surgery, the flap retraction device comprising a pressing piece, a spreading assembly and a connecting assembly; the front end of the pressing piece is movably connected to the front end of the spreading assembly through the connecting assembly, so that the two can rotate around the same rotating shaft, and the angle between the two can be adjusted as needed.

[0012] Preferably, the pressing member includes a tongue portion, a pressing portion, and a pressing handle portion; the tongue portion is in an elongated rectangular shape as a whole, the pressing portion and the pressing handle portion are both fixedly connected to the rear end of the tongue portion, and the pressing portion and the pressing handle portion are respectively located on both sides of the tongue portion, wherein the pressing portion extends to one side of the tongue portion, and the pressing handle portion extends above the tongue portion; a first through hole is provided at the front end of the tongue portion; the pressing portion includes a first pressing arm, a second pressing arm and a third pressing arm, the first pressing arm is fixedly connected to the rear end of the tongue portion, the first pressing arm, the second pressing arm and the third pressing arm are fixedly connected head to tail in sequence as a whole and are roughly U-shaped, and the second pressing arm and the third pressing arm are relative to each other The first pressing arm extends backward; the third pressing arm is not parallel to the first pressing arm, and the third pressing arm is inclined outward relative to the first pressing arm, and the angle between the two is 10° to 20°, so that the width of the open end of the pressing part is greater than its closed end; the pressing handle part includes a vertical section, an inclined section and a horizontal section; the lower end of the vertical section is fixedly connected to the rear end of the tongue part; the vertical section, the inclined section and the horizontal section are fixedly connected in sequence from head to tail as a whole; the inclined section is bent and extended backward relative to the vertical section, and the angle between the two is 30° to 50°; the horizontal section is bent and extended backward relative to the inclined section, and the angle between the two is 35° to 55°, and the horizontal section is used for the user to hold it.

[0013] Further preferably, the spreading component includes a spreading main body and a spreading fork-shaped member; the spreading main body includes two wing plates, a main body portion, a connecting portion, and a holding portion; the two wing plates are identical, parallel to each other and spaced apart, and the rear ends of both are fixedly connected to the front end face of the main body portion; the lower end of the connecting portion is fixedly connected to the rear end of the main body portion, the connecting portion extends upward and bends relative to the main body portion, and the included angle between the connecting portion and the main body portion is 70° to 80°; the front end of the holding portion is fixedly connected to the upper end of the connecting portion, the holding portion extends backward and bends relative to the connecting portion, and the included angle between the holding portion and the connecting portion is 35° to 55°; a convex portion protruding outward is provided at the connection between the connecting portion and the main body portion, and a third through hole is provided in the convex portion; the spreading fork-shaped member includes a fork-shaped portion and a first pin shaft; one end of the fork-shaped portion is open and the other end is closed; one end of the first pin shaft is fixedly provided at the closed end of the fork-shaped portion and the first pin shaft faces away from the fork of the fork-shaped portion; the first pin shaft is arranged in the third through hole to realize the hinge connection between the spreading fork-shaped member and the spreading main body, so that the fork-shaped portion of the spreading fork-shaped member can rotate relative to the spreading main body;

[0014] Further preferably, a second through hole is provided at the front end of each of the two wing plates, and the two second through holes are coaxial; the connecting component includes a second pin shaft; the tongue portion of the pressing member is arranged in the gap between the two wing plates of the spreading main body, and the second pin shaft penetrates into the second through holes at the front ends of the two wing plates and the first through hole at the front end of the tongue portion, so as to realize the hinge connection between the front end of the tongue portion of the pressing member and the front end of the spreading main body, so that both the pressing member and the spreading main body can rotate around the second pin shaft, and further the included angle between the two can be adjusted as required.

[0015] Further preferably, the flap retractor further includes a switch component for controlling the angle adjustment between the pressing member and the spreading component. When the switch component is in the open state, the angle between the pressing member and the spreading component can be adjusted. When the switch component is in the closed state, the angle between the pressing member and the spreading component remains unchanged.

[0016] The handle is a U-shaped groove, and the bottom surface of the handle is provided with ... A corner edge is provided at the intersection of the lower bottom surface of the part and its front end surface; the axe handle part is used for the user to hold it by hand; the arc-shaped part comprises an arc-shaped part and an inserting part which are fixedly connected to each other as an integral whole, and the inserting part is arranged at the lower end of the arc-shaped part, the arc-shaped part is arc-shaped and has teeth on its outer circumferential surface; the inserting part of the arc-shaped part is fixedly arranged in the pit on the upper surface of the convex tongue part, and the teeth of the arc-shaped part face backward; the sliding seat is arranged in the groove; the sliding part is movably arranged in the T-slot of the sliding seat; the elastic part is arranged between the rear end surface of the axe head of the sliding part and the rear end wall of the T-slot, and the front end of the elastic part abuts against the rear end surface of the axe head of the sliding part, and the rear end of the elastic part abuts against the rear end wall of the T-slot, and the forward elastic force applied by the elastic part to the axe head of the sliding part can make the axe head slide forward along the T-slot, so that the corner edge at the front end of the axe head can be mutually engaged with the teeth of the arc-shaped part of the arc-shaped part.

[0017] Further preferably, the upper surfaces of the two wing plates of the support body, the sliding seat, and the main body of the support body are joined to form a smoothly transitioned and upwardly arched arc-shaped upper surface, so that the three parts as a whole form an upwardly arched bow.

[0018] Further preferably, the pressing portion and the tongue portion are approximately located in the same plane, and the plane where the pressing handle portion is located is perpendicular to the plane where the pressing portion is located.

[0019] Further preferably, a second limit hole is provided at the end of the second pin shaft, and the second limit hole is a through hole; the connecting component also includes a C-shaped second limit pin, and the second limit pin penetrates into the second limit hole to prevent the second limit pin from escaping from the first through hole and the second through hole; a first limit hole is provided at the end of the first pin shaft, and the first limit hole is a through hole; the supporting fork-shaped member also includes a C-shaped first limit pin, and the first limit pin penetrates into the first limit hole to prevent the first pin shaft from escaping from the third through hole.

[0020] Further preferably, the fork-shaped portion is in a U-shape, a V-shape, a lying “E” shape, or a “mountain” shape.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The flap retraction device for cochlear implant electrode implantation surgery provided by the present invention includes a pressing piece, a spreading assembly and a connecting assembly. The front end of the pressing piece and the front end of the spreading assembly are movably connected through the connecting assembly so that the two can rotate around the same axis, thereby allowing the angle between the two to be adjusted as needed.

[0023] (2) The flap retraction device for cochlear implant electrode implantation surgery provided by the present invention also includes a switch assembly, which is used to control the adjustment of the angle between the pressing member and the stretching assembly. When the switch assembly is in an on state, the angle between the pressing member and the stretching assembly can be adjusted. When the switch assembly is in a off state, the angle between the pressing member and the stretching assembly remains unchanged.

[0024] (3) The skin flap retraction device for cochlear implant electrode implant surgery provided by the present invention no longer uses a retractor to manually retract the skin flap around the incision, but instead uses a pressing piece and a spreading assembly to retract the skin flap around the incision, wherein the pressing piece includes a pressing portion that is roughly U-shaped, and the spreading assembly includes a spreading fork-shaped piece, and the skin flap around the incision is retracted by the pressing portion of the pressing piece and the spreading fork-shaped piece of the spreading assembly. The retraction effect is better than that of the retractor, thereby increasing the surgical operating space and the surgical field of view.

[0025] (4) The skin flap retraction device for cochlear implant electrode implant surgery provided by the present invention comprises a pressing member including a pressing handle portion, and a stretching assembly including a gripping portion. The medical staff can easily pull the skin flap around the incision in opposite directions by holding the pressing handle portion of the pressing member with one hand and the gripping portion of the stretching assembly with the other hand, thereby saving time and effort for the medical staff in the surgical operation, and the skin flap can be more stably pulled.

[0026] (5) In the flap retraction device for cochlear implant electrode implantation surgery provided by the present invention, the third pressing arm of the pressing portion of the pressing piece is not parallel to the first pressing arm, the third pressing arm is inclined outward relative to the first pressing arm, and the angle between the two is 10° to 20°, so that the width of the open end of the pressing portion is larger than that of the closed end, which is beneficial for increasing the surgical operation space, for example, it is beneficial to insert a drill from the open end of the pressing portion and close to the third pressing arm to perform surgical operations.

[0027] (6) The flap retraction device for cochlear implant electrode implantation surgery provided by the present invention can increase the surgical field of view, and the flap is stably retracted. When medical staff use a drill to grind the skull, they can avoid accidentally touching and wearing the soft tissue around the incision, thereby avoiding unnecessary damage to the soft tissue. They can also avoid the drill from accidentally touching the retractor, thereby avoiding damage to the drill.

[0028] (7) The skin flap retraction device for cochlear implant electrode implant surgery provided by the present invention no longer uses a retractor to manually retract the skin flap around the incision, but instead uses a pressing piece and a spreading assembly to retract the skin flap around the incision in opposite directions, and the skin flap is retracted in a stable state, thereby preventing the patient's position from being moved, thereby ensuring the surgical operation and progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Figure 1 One of the overall structural schematic diagrams of the flap retraction device for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0031] Figure 2 The second schematic diagram of the overall structure of the flap retraction device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0032] Figure 3 An exploded schematic diagram of a flap retractor for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0033] Figure 4 A partially enlarged schematic diagram of a pressing member of a flap retraction device for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0034] Figure 5 A schematic side view of a spreading main body of a spreading assembly of a flap retraction device for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0035] Figure 6 A partially enlarged schematic diagram of a spreading main body of a spreading assembly of a flap retractor for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0036] Figure 7 A three-dimensional schematic diagram of a spreading fork-shaped member of a spreading assembly of a flap retractor for cochlear implant electrode implantation surgery provided by an embodiment of the present invention;

[0037] Figure 8Schematic three-dimensional view of the second pin shaft of the connection assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0038] Figure 9 Schematic three-dimensional view of the first limit pin of the spreading fork-shaped member and the second limit pin of the connection assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0039] Figure 10 One of the schematic three-dimensional views of the sliding seat of the switch assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0040] Figure 11 Another schematic three-dimensional view of the sliding seat of the switch assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0041] Figure 12 Schematic three-dimensional view of the sliding member of the switch assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention;

[0042] Figure 13 Schematic three-dimensional view of the arc-shaped member of the switch assembly of the flap retractor device for cochlear implant electrode implantation surgery provided by the embodiment of the present invention. Detailed implementation manners

[0043] To more clearly illustrate the present invention, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0044] As Figure 1 、 Figure 2 and Figure 3 shown, this embodiment provides a flap retractor device for cochlear implant electrode implantation surgery. The flap retractor device includes a pressing member 10, a spreading assembly, and a connection assembly 40; the front end of the pressing member 10 is movably connected to the front end of the spreading assembly through the connection assembly 40, so that the two can rotate around the same rotation axis, and thus the included angle between the two can be adjusted as needed.

[0045] As Figure 3 and Figure 4As shown, the pressing member 10 includes a tongue portion 11, a pressing portion 12, and a pressing handle portion 13; the tongue portion 11 is generally in the shape of an elongated rectangular parallelepiped, the pressing portion 12 and the pressing handle portion 13 are both fixedly connected to the rear end of the tongue portion 11, and the pressing portion 12 and the pressing handle portion 13 are respectively located on both sides of the tongue portion 11, wherein the pressing portion 12 extends toward one side of the tongue portion 11, and the pressing handle portion 13 extends upward of the tongue portion 11; a first through hole 14 is provided at the front end of the tongue portion 11, and a concave pit 15 is provided on the upper surface of the tongue portion 11. In a preferred embodiment of the present embodiment, the pressing portion 12 and the tongue portion 11 are generally in the same plane, and the plane where the pressing handle portion 13 is located is perpendicular to the plane where the pressing portion 12 is located.

[0046] The pressing portion 12 includes a first pressing arm 12-1, a second pressing arm 12-2, and a third pressing arm 12-3. The first pressing arm 12-1 is fixedly connected to the rear end of the tongue portion 11. The first pressing arm 12-1, the second pressing arm 12-2, and the third pressing arm 12-3 are fixedly connected end to end in sequence to form a generally U-shaped body, and both the second pressing arm 12-2 and the third pressing arm 12-3 extend rearward relative to the first pressing arm 12-1. In a preferred embodiment of the present embodiment, the third pressing arm 12-3 is not parallel to the first pressing arm 12-1, the third pressing arm 12-3 is inclined outward relative to the first pressing arm 12-1, and the included angle between the two is 10° to 20° (preferably 15°), so that the width of the open end of the pressing portion 12 is greater than its closed end, which is beneficial to increasing the surgical operation space. For example, it is beneficial to insert a drill bit from the open end of the pressing portion 12 and near the third pressing arm 12-3 side for surgical operation.

[0047] The pressing handle portion 13 includes a vertical section 13-1, an inclined section 13-2, and a horizontal section 13-3; the lower end of the vertical section 13-1 is fixedly connected to the rear end of the tongue portion 11; the vertical section 13-1, the inclined section 13-2, and the horizontal section 13-3 are fixedly connected end to end in sequence to form a body; the inclined section 13-2 extends rearward and bends relative to the vertical section 13-1, and the included angle between the two is 30° to 50° (preferably 40° to 45°); the horizontal section 13-3 extends rearward and bends relative to the inclined section 13-2, and the included angle between the two is 35° to 55° (preferably 45°), and the horizontal section 13-3 is for the user's hand to hold.

[0048] As Figure 3 、 Figure 5 and Figure 6As shown, the spreading component includes a spreading main body 20 and a spreading fork-shaped member 30; the spreading main body 20 includes two wing plates 21, a main body portion 23, a connecting portion 24, and a holding portion 25; the two wing plates 21 are the same, parallel to each other and spaced apart, and the rear ends of both are fixedly connected to the front end face of the main body portion 23; the lower end of the connecting portion 24 is fixedly connected to the rear end of the main body portion 23, the connecting portion 24 extends upward and bends relative to the main body portion 23, and the included angle between the connecting portion 24 and the main body portion 23 is 60° to 80° (preferably 75°); the front end of the holding portion 25 is fixedly connected to the upper end of the connecting portion 24, the holding portion 25 extends backward and bends relative to the connecting portion 24, and the included angle between the holding portion 25 and the connecting portion 24 is 35° to 55° (preferably 45°), and the holding portion 25 is for the user's hand to hold; a second through hole 22 is provided at the front end of each of the two wing plates 21, and the two second through holes 22 are coaxial; a U-shaped groove 26 is provided at the connection between the two wing plates 21 and the main body portion 23; a protruding portion 27 protruding outward is provided at the connection between the connecting portion 24 and the main body portion 23, and a third through hole 28 is provided in the protruding portion.

[0049] As Figure 3 and Figure 7 shown, the spreading fork-shaped member 30 includes a fork-shaped portion 31 and a first pin shaft 32; one end of the fork-shaped portion 31 is open and the other end is closed, and the fork-shaped portion 31 can be U-shaped, V-shaped, a lying "E" shape, or a "mountain" shape, preferably U-shaped; one end of the first pin shaft 32 is fixedly provided at the closed end of the fork-shaped portion 31 and the first pin shaft 32 faces away from the bifurcation of the fork-shaped portion 31; the first pin shaft 32 is arranged in the third through hole 28 to realize the hinge connection between the spreading fork-shaped member 30 and the spreading main body 20, so that the fork-shaped portion 31 of the spreading fork-shaped member 30 can rotate relative to the spreading main body 20, that is, the fork-shaped portion 31 of the spreading fork-shaped member 30 can rotate around the first pin shaft 32. In a preferred implementation manner of this embodiment, a first limiting hole 33 is provided at the end of the first pin shaft 32, and the first limiting hole 33 is a through hole; the spreading fork-shaped member 30 further includes a C-shaped first limiting pin 34, and the first limiting pin 34 is inserted into the first limiting hole 33 to prevent the first pin shaft 32 from coming out of the third through hole 28.

[0050] As Figure 3 、 Figure 8 and Figure 9As shown, the connecting component 40 includes a second pin shaft 41. The tongue portion 11 of the pressing member 10 is disposed within the gap between the two wing plates 21 of the spreading main body member 20, and the second pin shaft 41 penetrates into the second through holes 22 at the front ends of the two wing plates 21 and the first through hole 14 at the front end of the tongue portion 11, realizing the hinged connection of the front end of the tongue portion 11 of the pressing member 10 with the front end of the spreading main body member 20, such that both the pressing member 10 and the spreading main body member 20 can rotate around the second pin shaft 41, and thus the included angle therebetween can be adjusted as needed. In a preferred embodiment of the present embodiment, a second limiting hole 42 is provided at the end of the second pin shaft 41, and the second limiting hole 42 is a through hole; the connecting component 40 further includes a C-shaped second limiting pin 43, and the second limiting pin 43 penetrates into the second limiting hole 42 to prevent the second limiting pin 43 from disengaging from the first through hole 14 and the second through hole 22. In the present embodiment, it is preferred that the shape of the second limiting pin 43 is the same as that of the first limiting pin 34.

[0051] In a preferred embodiment of the present embodiment, the flap retractor further includes a switch assembly for controlling the adjustment of the included angle between the pressing member 10 and the spreading assembly. When the switch assembly is in the open state, the included angle between the pressing member 10 and the spreading assembly can be adjusted, and when the switch assembly is in the closed state, the included angle between the pressing member 10 and the spreading assembly remains unchanged (i.e., is locked).

[0052] The switch assembly includes a sliding seat 50, a sliding member 60, an elastic member 70, and an arc-shaped member 80; as Figure 10 and Figure 11 shown, the sliding seat 50 includes a seat body portion 51, and the lower bottom surface, front end surface, rear end surface, and both side surfaces of the seat body portion 51 are flush. The upper surface 55 of the seat body portion 51 is in the shape of a slope with a higher rear end and a lower front end; an inverted T-shaped groove 52 is provided inside the seat body portion 51. The connection between the T-shaped groove 52 and the front end surface of the seat body portion 51 is a rectangular opening 53, the connection between the T-shaped groove 52 and the upper surface 55 of the seat body portion 51 is a U-shaped notch 54, and the lower bottom wall, rear end wall, and both side walls of the T-shaped groove 52 are closed.

[0053] As Figure 12 shown, the sliding member 60 is integrally in the shape of an axe with a handle; the sliding member 60 includes an axe head portion 61 and an axe handle portion 64, and the extending direction of the axe handle portion 64 is perpendicular to the extending direction of the axe head portion 61; the shape and size of the sliding member 60 match those of the T-shaped groove 52 of the sliding seat 50; a chamfer 62 is provided at the intersection of the upper surface and the front end surface of the axe head portion 61, and a corner edge 63 is provided at the intersection of the lower bottom surface and the front end surface of the axe head portion 61; the axe handle portion 64 is for the user's hand to hold.

[0054] As Figure 13As shown, the arc-shaped member 80 includes an arc portion 81 and a plug-in portion 82 that are fixedly connected to each other as a whole. The plug-in portion 82 is provided at the lower end of the arc portion 81. The arc portion 81 is arc-shaped and has teeth 83 provided on its outer circumferential surface. The plug-in portion 82 of the arc-shaped member 80 is fixedly provided in the recess 15 on the upper surface of the tongue portion 11, and the teeth 83 of the arc portion 81 face backward.

[0055] The sliding seat 50 is arranged in the groove 26; in a preferred embodiment of this embodiment, the upper surfaces of the two wing plates 21 of the spreading main body member 20, the sliding seat 50, and the main body portion 23 of the spreading main body member 20 are joined together to form a smoothly transitioning and upwardly arched arc-shaped upper surface, so that these three parts form an upwardly arched bow as a whole; the sliding member 60 is movably arranged in the T-shaped groove 52 of the sliding seat 50; the elastic member 70 is arranged between the rear end surface of the axe head portion 61 of the sliding member 60 and the rear end wall of the T-shaped groove 52, and the front end of the elastic member 70 abuts against the rear end surface of the axe head portion 61 of the sliding member 60, and the rear end of the elastic member 70 abuts against the rear end wall of the T-shaped groove 52. The forward elastic force exerted by the elastic member 70 on the axe head portion 61 of the sliding member 60 can cause the axe head portion 61 to slide forward along the T-shaped groove 52, so that the corner edge 63 at the front end of the axe head portion 61 can be engaged with the teeth 83 of the arc portion 81 of the arc-shaped member 80. The elastic member 70 is preferably a spring.

[0056] The usage method of the switch assembly of the flap retractor device in this embodiment is as follows:

[0057] When it is necessary to adjust the angle between the pressing member 10 and the spreading assembly, the user's hand can hold the axe handle portion 64 of the sliding member 60 and push it backward, so that the axe head portion 61 slides backward along the T-shaped groove 52 and the elastic member 70 contracts. The corner edge 63 at the front end of the axe head portion 61 is disengaged from the teeth 83 of the arc portion 81 of the arc-shaped member 80. At this time, the switch assembly is in the open state;

[0058] When it is necessary to keep the angle between the pressing member 10 and the spreading assembly unchanged (i.e., locked), the user's hand can release the axe handle portion 64 of the sliding member 60. The forward elastic force exerted by the elastic member 70 on the axe head portion 61 of the sliding member 60 can cause the axe head portion 61 to slide forward along the T-shaped groove 52, so that the corner edge 63 at the front end of the axe head portion 61 can be engaged with the teeth 83 of the arc portion 81 of the arc-shaped member 80. At this time, the switch assembly is in the closed state.

[0059] The usage method and usage state of the flap retractor device in this embodiment are as follows:

[0060] When the switch assembly is in the open state, the user holds the pressing handle portion 13 of the pressing member 10 with one hand and holds the holding portion 25 of the spreading main body member 20 of the spreading assembly with the other hand. The pressing portion 12 of the pressing member 10 presses down on a skin flap (i.e., skin, muscle, and soft tissue) at the surgical incision, and the fork-shaped portion 31 of the spreading fork-shaped member 30 of the spreading assembly props up another skin flap at the surgical incision. The angle between the tongue portion 11 of the pressing member 10 and the spreading main body member 20 is adjusted to an appropriate angle, so as to realize pulling the two skin flaps at the surgical incision to an appropriate size and expanding the surgical field of view;

[0061] When the two skin flaps at the surgical incision are pulled to an appropriate size, the switch assembly is closed so that the angle between the tongue portion 11 of the pressing member 10 and the spreading main body member 20 remains unchanged (i.e., is locked), and then a surgical tool such as a drill is inserted into the gap between the two pulled skin flaps for surgery.

[0062] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to enumerate all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A flap retractor for cochlear implant electrode implantation surgery, characterized in that: The flap retraction device comprises a pressing member (10), a spreading assembly and a connecting assembly (40); the front end of the pressing member (10) is movably connected to the front end of the spreading assembly via the connecting assembly (40), so that the two can rotate around the same rotation axis, thereby enabling the angle between the two to be adjusted as required.

2. The flap retraction device for cochlear implant electrode implantation surgery according to claim 1, characterized in that: The pressing member (10) comprises a tongue portion (11), a pressing portion (12), and a pressing handle portion (13); the tongue portion (11) is in the shape of an elongated rectangular parallelepiped as a whole, the pressing portion (12) and the pressing handle portion (13) are both fixedly connected to the rear end of the tongue portion (11), and the pressing portion (12) and the pressing handle portion (13) are respectively located on both sides of the tongue portion (11), wherein the pressing portion (12) extends to one side of the tongue portion (11), and the pressing handle portion (13) extends above the tongue portion (11); a first through hole (14) is provided at the front end of the tongue portion (11); The pressing portion (12) comprises a first pressing arm (12-1), a second pressing arm (12-2) and a third pressing arm (12-3); the first pressing arm (12-1) is fixedly connected to the rear end of the tongue portion (11); the first pressing arm (12-1), the second pressing arm (12-2) and the third pressing arm (12-3) are fixedly connected end to end in sequence to form a whole and are roughly U-shaped; the second pressing arm (12-2) and the third pressing arm (12-3) both extend backward relative to the first pressing arm (12-1); the third pressing arm (12-3) is not parallel to the first pressing arm (12-1); the third pressing arm (12-3) is inclined outward relative to the first pressing arm (12-1), and the angle formed between the two is 10° to 20°, so that the width of the open end of the pressing portion (12) is greater than that of the closed end thereof; The pressing handle portion (13) comprises a vertical section (13-1), an inclined section (13-2) and a horizontal section (13-3); the lower end of the vertical section (13-1) is fixedly connected to the rear end of the tongue portion (11); the vertical section (13-1), the inclined section 13-2 and the horizontal section 13-3 are fixedly connected end to end in sequence as a whole; the inclined section (13-2) is bent backwards and extends relative to the vertical section (13-1), and the angle between the two is 30° to 50°; the horizontal section (13-3) is bent backwards and extends relative to the inclined section (13-2), and the angle between the two is 35° to 55°, and the horizontal section (13-3) is used for being held by a user's hand.

3. The flap retraction device for cochlear implant electrode implantation surgery according to claim 2, characterized in that: The expansion assembly comprises an expansion main body member (20) and an expansion fork member (30); The support body (20) comprises two wing plates (21), a main body (23), a connecting portion (24), and a gripping portion (25); the two wing plates (21) are identical, parallel to each other and spaced apart, and the rear ends of the two wing plates are fixedly connected to the front end surface of the main body (23); the lower end of the connecting portion (24) is fixedly connected to the rear end of the main body (23), the connecting portion (24) is bent upward relative to the main body (23), and the angle between the connecting portion (24) and the main body (23) is 70° to 80°; the front end of the gripping portion (25) is fixedly connected to the upper end of the connecting portion (24), the gripping portion (25) is bent backward relative to the connecting portion (24), and the angle between the gripping portion (25) and the connecting portion (24) is 35° to 55°; a protruding portion 27 protruding outward is provided at the connection between the connecting portion (24) and the main body (23), and the protruding portion is provided with a third through hole (28); The spreading fork-shaped member (30) comprises a fork-shaped portion (31) and a first pin shaft (32); one end of the fork-shaped portion (31) is open and the other end thereof is closed; one end of the first pin shaft (32) is fixedly arranged at the closed end of the fork-shaped portion (31) and the first pin shaft (32) faces away from the fork-shaped portion (31); the first pin shaft (32) is arranged in the third through hole (28) to realize the hinge connection between the spreading fork-shaped member (30) and the spreading main body member (20), so that the fork-shaped portion (31) of the spreading fork-shaped member (30) can rotate relative to the spreading main body member (20).

4. The flap retraction device for cochlear implant electrode implantation surgery according to claim 3, characterized in that: The front ends of the two wing plates (21) are each provided with a second through hole (22), and the two second through holes (22) are coaxial; The connecting assembly (40) comprises a second pin shaft (41); the tongue portion (11) of the pressing member (10) is arranged in a gap between two wing plates (21) of the expanded main body (20), and the second pin shaft (41) penetrates into the second through hole (22) at the front end of the two wing plates (21) and the first through hole (14) at the front end of the tongue portion (11), so that the front end of the tongue portion (11) of the pressing member (10) is hinged with the front end of the expanded main body (20), so that the pressing member (10) and the expanded main body (20) can both rotate around the second pin shaft (41), thereby making the angle between the two adjustable as required.

5. The flap retraction device for cochlear implant electrode implantation surgery according to claim 4, characterized in that: The skin flap retraction device also includes a switch component, which is used to control the adjustment of the angle between the pressing member (10) and the stretching member. When the switch component is in an on state, the angle between the pressing member (10) and the stretching member can be adjusted. When the switch component is in a off state, the angle between the pressing member (10) and the stretching member remains unchanged.

6. The flap retraction device for cochlear implant electrode implantation surgery according to claim 5, characterized in that: The upper surface of the tongue portion (11) is provided with a recess (15); a U-shaped groove (26) is provided at the connection between the two wing plates (21) and the main body (23); The switch assembly comprises a sliding seat (50), a sliding member (60), an elastic member (70), and an arc-shaped member (80); the sliding seat (50) comprises a seat body (51); the lower bottom surface, the front end surface, the rear end surface and the two side surfaces of the seat body (51) are all flush; the upper surface (55) of the seat body (51) is in a slope shape with the rear end higher and the front end lower; an inverted T-shaped groove (52) is arranged inside the seat body (51); the connection point between the T-shaped groove (52) and the front end surface of the seat body (51) is a rectangular opening (53); the connection point between the T-shaped groove (52) and the upper surface (55) of the seat body (51) is a U-shaped notch (54); the lower bottom wall, the rear end wall and the two side walls of the T-shaped groove (52) are all closed; The sliding member (60) is in the shape of an axe with a handle as a whole; the sliding member (60) comprises an axe head (61) and an axe handle (64), and the extension direction of the axe handle (64) is perpendicular to the extension direction of the axe head (61); the shape and size of the sliding member (60) are matched with the T-shaped slot (52) of the sliding seat (50); a chamfer (62) is provided at the intersection of the upper surface of the axe head (61) and its front end surface, and a corner edge (63) is provided at the intersection of the lower bottom surface of the axe head (61) and its front end surface; the axe handle (64) is used for being held by a user's hand; The arc-shaped member (80) comprises an arc-shaped portion (81) and an inserting portion (82) which are fixedly connected to each other as one body, and the inserting portion (82) is arranged at the lower end of the arc-shaped portion (81), and the arc-shaped portion (81) is in an arc shape and has teeth (83) arranged on its outer circumferential surface; the inserting portion (82) of the arc-shaped member (80) is fixedly arranged in a recess (15) on the upper surface of the tongue portion (11), and the teeth (83) of the arc-shaped portion (81) face backwards; The slide seat (50) is arranged in the groove (26); the sliding member (60) is movably arranged in the T-shaped groove (52) of the slide seat (50); the elastic member (70) is arranged between the rear end surface of the axe head (61) of the sliding member (60) and the rear end wall of the T-shaped groove (52), and the front end of the elastic member (70) and the rear end surface of the axe head (61) of the sliding member (60) are mutually abutted, and the rear end of the elastic member (70) and the rear end wall of the T-shaped groove (52) are mutually abutted, and the forward elastic force applied by the elastic member (70) to the axe head (61) of the sliding member (60) can make the axe head (61) slide forward along the T-shaped groove (52), thereby making the corner edge (63) at the front end of the axe head (61) able to engage with the teeth (83) of the arc portion (81) of the arc member (80).

7. The flap retraction device for cochlear implant electrode implantation surgery according to claim 6, characterized in that: The upper surfaces of the two wing plates (21) of the main body (20), the sliding seat (50) and the main body (23) of the main body (20) are connected to form a smoothly transitioned and upwardly arched arc-shaped upper surface, so that the three parts as a whole form an upwardly arched bow.

8. The flap retraction device for cochlear implant electrode implantation surgery according to claim 2, characterized in that: The pressing portion (12) and the tongue portion (11) are approximately located in the same plane, and the plane where the pressing handle portion (13) is located is perpendicular to the plane where the pressing portion (12) is located.

9. The flap retraction device for cochlear implant electrode implantation surgery according to claim 2, characterized in that: A second limiting hole (42) is provided at the end of the second pin shaft (41), and the second limiting hole (42) is a through hole; the connecting assembly (40) further comprises a C-shaped second limiting pin (43), and the second limiting pin (43) penetrates into the second limiting hole (42) to prevent the second limiting pin (43) from coming out of the first through hole (14) and the second through hole (22); A first limiting hole (33) is provided at the end of the first pin shaft (32), and the first limiting hole (33) is a through hole; the fork-shaped member (30) further comprises a C-shaped first limiting pin (34), and the first limiting pin (34) penetrates into the first limiting hole (33) to prevent the first pin shaft (32) from falling out of the third through hole (28).

10. The flap retraction device for cochlear implant electrode implantation surgery according to claim 3, characterized in that: The fork-shaped portion (31) is in a U-shape, a V-shape, a lying "E" shape, or a "mountain" shape.

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