A crank rotatable vessel anastomat providing a good surgical field of view

Abstract

The application provides a crank rotatable blood vessel anastomat capable of providing a good surgical field, comprising a firing mechanism, a crank transmission mechanism and an anastomat nail pushing and forming mechanism; the firing mechanism is configured to drive the crank transmission mechanism and push the anastomat nail pushing and forming mechanism to complete anastomat nail forming and blood vessel anastomosis; the crank transmission mechanism is configured to avoid the occlusion of the rear part of the anastomat and the operating hand to the surgical field through rotation of the crank, and assist in finding a suitable angle for use of the anastomat; the anastomat nail pushing and forming mechanism is configured to complete anastomat nail forming and blood vessel anastomosis under the pushing of the crank transmission mechanism; the firing mechanism drives the crank transmission mechanism, which can push the anastomat nail pushing and forming mechanism to complete anastomat nail forming and blood vessel anastomosis; meanwhile, the crank transmission mechanism can avoid the occlusion of the rear part of the anastomat and the operating hand to the surgical field, and rotation of the crank transmission mechanism can further assist in finding a suitable angle for use of the anastomat.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a crank-rotatable vascular anastomosis device that provides a good surgical field of vision. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Vascular suturing is a challenging and time-consuming surgical procedure primarily used to repair ruptured blood vessels caused by trauma or human error. This procedure can easily lead to platelet deposition at the suture site, potentially causing thrombosis. Vascular anastomosis devices are alternatives to manual suturing of blood vessels, enabling rapid anastomosis of ruptured vascular sites. They are technically simple and allow for quick operation.

[0004] The inventors discovered that traditional vascular anastomosis devices, such as the vascular anastomosis device provided by patent number CN108210004A, easily obstruct the surgical field of vision during operation, especially in neurosurgery, where the surgical window is small, many instruments are inserted at the same time, the field of vision of the vascular anastomosis area is poor, the light is weak, and the vascular anastomosis time is greatly prolonged. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a crank-rotatable vascular anastomosis device that offers a good surgical field of vision. The firing mechanism drives the crank transmission mechanism, which in turn pushes the staple pushing and forming mechanism to complete the staple forming and vascular anastomosis. At the same time, the crank transmission mechanism can prevent the rear of the anastomosis device and the operator's hand from obstructing the surgical field of vision. The rotating crank transmission mechanism can further assist in finding the appropriate angle for using the anastomosis device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A crank-rotatable vascular anastomosis device that provides a good surgical field of view includes:

[0008] The firing mechanism, crank transmission mechanism, and staple pushing and forming mechanism;

[0009] The firing mechanism is configured to drive the crank transmission mechanism to push the staple pushing and forming mechanism to complete the forming of the staples and the vascular anastomosis;

[0010] The crank drive mechanism is configured to avoid obstruction of the surgical field of view by the rear of the stapler and the operator's hand through the rotation of the crank, and to assist in finding the appropriate angle for the use of the stapler.

[0011] The staple pushing and forming mechanism is configured to form staples and perform vascular anastomosis under the drive of a crank drive mechanism.

[0012] As an optional implementation, the firing mechanism includes a housing, a firing handle, a push block, and a return spring, with the end closer to the surgical site being the proximal end and the end farther from the surgical site being the distal end.

[0013] The shell includes an upper shell and a lower shell that are connected to each other. A groove is provided along the length of the upper shell and the lower shell. Rectangular slots are provided on both sides of the groove. Rectangular holes are provided on the left and right sides near the proximal end of the upper shell and the lower shell. Rectangular holes that communicate with each other are provided on the upper and lower surfaces near the proximal end of the upper shell and the lower shell. Circular holes are provided along the length of the proximal end of the upper shell and the lower shell.

[0014] The firing handle consists of a left firing handle and a right firing handle. The rear end of the left and right firing handles has a round hole, which is interference-fitted with the round hole groove of the housing. The left and right firing handles are installed inside the housing. The outer side of the proximal end of the left and right firing handles has a pressing structure. The inner side of the proximal end of the left and right firing handles has a sloping groove and a boss. The boss of the left and right firing handles fits with the rectangular grooves of the upper and lower housings.

[0015] The push block has a left boss and a right boss. The left boss engages with the groove on the inner side of the proximal end of the left firing handle, and the right boss engages with the inclined groove on the inner side of the proximal end of the right firing handle. The push block can be moved by the inclined groove on the proximal end when the left and right firing handles are pressed. The push block has a circular through hole at the center position along the proximal-distal direction. The proximal end of the push block has a cylindrical boss. The proximal end of the return spring contacts the groove on the upper shell and the groove on the lower shell. The distal end of the return spring contacts the push block.

[0016] Furthermore, the crank drive mechanism includes at least: a crank, a flexible steel sheet, a proximal connecting block, and a distal connecting block;

[0017] The crank has a cylindrical rotating wheel at the far end. The cylindrical rotating wheel is used to install in the rectangular hole at the near end of the upper and lower housings of the firing mechanism and can rotate in the rectangular hole. The crank has a boss at the near end with a connecting hole. The crank has a rectangular through hole and a circular through hole along its length.

[0018] The flexible steel sheet has connection holes at both the proximal and distal ends. The flexible steel sheet is installed into the rectangular through hole of the crank and can slide freely in the rectangular through hole.

[0019] The proximal connecting block has a circular through hole along its length and upper and lower through holes at its distal end. The upper and lower through holes are connected to and fixed to the proximal connecting hole of the flexible steel sheet. When the flexible steel sheet moves, the proximal connecting block can move accordingly. The proximal connecting block has a rectangular boss on its proximal bottom surface.

[0020] The distal connecting block includes an upper distal connecting block and a lower distal connecting block. The proximal ends of the upper and lower distal connecting blocks are provided with vertical connecting holes. The connecting holes of the upper and lower distal connecting blocks are connected and fixed to the distal connecting holes of the flexible steel sheet. The distal connecting blocks can rotate around the axis of the push block in the firing mechanism. The distal end of the distal connecting block is provided with a circular groove. The circular groove cooperates with the cylindrical boss at the proximal end of the push block in the firing mechanism. The upper and lower distal connecting blocks are provided with semi-circular grooves along their length. When the upper and lower distal connecting blocks are combined together, they form a circular through hole.

[0021] Furthermore, the crank drive mechanism also includes: a connecting housing;

[0022] The connecting housing includes a left connecting housing and a right connecting housing. The proximal, middle, and distal ends of the left and right connecting housings respectively contain cylinders and corresponding circular slots for assembling and sealing the left and right connecting housings.

[0023] When installing the left and right connecting housings, the distal cylinder first passes through the connecting hole on the distal boss of the crank, and then connects with the corresponding circular slot, thereby fixing the relative positions of the left and right connecting housings and the crank.

[0024] Furthermore, the staple pushing and forming mechanism includes a pushing spring plate, a steel bar pushing block, a flexible steel bar, a fixing groove, a forming steel plate, a pushing steel plate, a fixing shell, a fixing block, a staple pushing block, and staples;

[0025] The proximal end of the push spring plate is fixed in the groove of the lower housing of the firing mechanism. The steel bar push block is installed in the groove of the lower housing of the firing mechanism. The distal end of the steel bar push block is provided with an arc-shaped concave structure. The arc-shaped structure cooperates with the push spring plate to push the spring plate to drive the steel bar push block to move. The proximal end of the steel bar push block is provided with a circular non-through hole along the axial direction.

[0026] When the flexible steel bar passes through the circular through hole of the crank in the crank transmission mechanism, the circular through hole of the near end connecting block, the upper far end connecting block and the lower far end connecting block together, a circular through hole is formed. The far end of the flexible steel bar is installed in the circular non-through hole of the steel bar push block.

[0027] The fixed groove has a groove along its length, with an arc-shaped groove at the bottom. The fixed groove has a rectangular boss at the far end and a boss at the middle position. The fixed groove has a downward bending structure at the near end.

[0028] The far end of the formed steel sheet is provided with a fixing groove, which cooperates with the rectangular boss on the fixing groove body. The far end of the formed steel sheet is provided with a rectangular hole, and the near end of the formed steel sheet is provided with an elastic arm. The near end of the elastic arm is provided with a bending structure that cooperates with the bending structure of the fixing groove body. The bottom surface of the end of the bending structure is provided with a forming boss, and the outer side of the elastic arm is provided with a protruding structure.

[0029] The pushing steel plate fixes the fixing groove and the forming steel plate inside at the far end. The far end of the pushing steel plate is provided with a rectangular hole, which can cooperate with the rectangular boss on the bottom surface of the near end of the near end connecting block in the crank transmission mechanism. The middle and far ends of the pushing steel plate are provided with rectangular holes.

[0030] The fixed housing has a rectangular through hole inside, and the upper surface of the rectangular through hole has a two-stage boss. The first stage of the two-stage boss engages with the rectangular hole at the far end of the pushing steel plate, restricting the pushing steel plate from sliding a certain distance along the first stage boss. The second stage of the two-stage boss engages with the rectangular hole at the far end of the forming steel plate, completely restricting the position movement of the forming steel plate. The bottom surface of the fixed housing has a boss, and the boss has a through hole. The through hole engages with the cylinder at the near end of the left housing in the crank transmission structure.

[0031] The right side of the fixing block is provided with a semi-circular groove that allows flexible steel bars to pass through, and the upper surface of the fixing block has a certain number of protrusions;

[0032] The distal end of the staple pusher block has a round hole for inserting a flexible steel strip. The staple pusher block can bend at a certain angle. The staple is installed in the groove of the fixing slot and can only slide along the groove under the action of the formed steel sheet.

[0033] The staples are circular in shape with an angled notch, the notch being at the tip, and are placed in the fixation groove with the notch pointing proximally.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The crank-rotatable vascular anastomosis device described in this invention provides a good surgical field of vision. Through the structural design of the crank transmission mechanism, the firing mechanism drives the crank transmission mechanism to push the anastomosis staple pushing and forming mechanism to complete the anastomosis staple forming and vascular anastomosis. At the same time, the crank transmission mechanism can avoid the rear of the anastomosis device and the operator's hand from obstructing the surgical field of vision. The rotation of the crank transmission mechanism can further assist in finding the appropriate angle for the use of the anastomosis device, which greatly reduces the vascular anastomosis time and improves the anastomosis accuracy and efficiency.

[0036] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0038] Figure 1 This is a schematic diagram of the overall structure of the crank-rotatable vascular anastomosis device provided in an embodiment of the present invention.

[0039] Figure 2 This is an unfolded view of the overall structure provided in an embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram of the firing mechanism provided in an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the upper housing of the firing mechanism provided in an embodiment of the present invention.

[0042] Figure 5 This is a schematic diagram of the lower housing of the firing mechanism provided in an embodiment of the present invention.

[0043] Figure 6 This is a schematic diagram of the firing handle in the firing mechanism provided in an embodiment of the present invention.

[0044] Figure 7 This is a schematic diagram of the push block in the firing mechanism provided in an embodiment of the present invention.

[0045] Figure 8 A schematic diagram of a crank transmission mechanism provided in an embodiment of the present invention.

[0046] Figure 9 This is a cross-sectional view of the crank of the crank transmission mechanism provided in an embodiment of the present invention.

[0047] Figure 10 This is a schematic diagram of the flexible steel sheet of the crank transmission mechanism provided in an embodiment of the present invention bending inside the crank.

[0048] Figure 11 This is a schematic diagram of the proximal connecting block of the crank transmission mechanism provided in an embodiment of the present invention.

[0049] Figure 12 A schematic diagram of the distal connecting block of the crank transmission mechanism provided in an embodiment of the present invention.

[0050] Figure 13 This is a schematic diagram of the connecting housing of the crank transmission mechanism provided in an embodiment of the present invention.

[0051] Figure 14 This is a schematic diagram of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0052] Figure 15This is a schematic diagram of the push spring plate of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0053] Figure 16 This is a schematic diagram of the steel bar pusher block of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0054] Figure 17 This is a schematic diagram of the flexible steel bar of the staple pushing and forming mechanism provided in an embodiment of the present invention bending inside the crank.

[0055] Figure 18 This is a schematic diagram of the fixing groove of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0056] Figure 19 This is a schematic diagram of the forming steel sheet of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0057] Figure 20 This is a schematic diagram of the pushing steel plate of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0058] Figure 21 This is a schematic diagram of the fixed housing of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0059] Figure 22 This is a schematic diagram of the fixing block of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0060] Figure 23 This is a schematic diagram of the staple pushing block of the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0061] Figure 24 This is a schematic diagram of the staples in the staple pushing and forming mechanism provided in an embodiment of the present invention.

[0062] Figure 25 This is a schematic diagram of the installation of the anastomosis staples and the staple pushing block provided in an embodiment of the present invention.

[0063] Wherein, 1-Left excitation handle; 2-Right excitation handle; 3-Upper housing; 4-Lower housing; 5-Left excitation handle pressing position; 6-Right excitation handle pressing position; 7-Push spring plate; 8-Steel bar push block; 9-Flexible steel bar; 10-Push block; 11-Distant connecting block; 12-Flexible steel sheet; 13-Proximal connecting block; 14-Right connecting housing; 15-Fixed housing; 16-Fixed groove plate; 17-Push steel sheet; 18-Formed steel sheet; 19-Round hole; 20-... 21-Lower rectangular hole; 22-Rectangular groove; 23-Right rectangular hole; 24-Far-end circular hole groove; 25-Middle circular hole groove; 26-Front-end circular hole groove; 27-Circular hole; 28-Beveled groove; 29-Boss; 30-Return spring; 31-Cylindrical boss; 32-Circular through hole; 33-Left boss; 34-Right boss; 35-Cylindrical rotating wheel; 36-Upper far-end connecting block; 37-Lower far-end connecting block; 38-Crank; 39-Connecting hole; 40-Boss ; 41-Right connecting shell; 42-Proximal connecting block; 43-Rectangular through hole; 44-Circular through hole; 45-Circular through hole; 46-Upper and lower through holes; 47-Rectangular boss; 48-Circular groove; 49-Semi-circular groove; 50-Connecting hole; 51-Proximal cylinder; 52-Middle cylinder; 53-Distal cylinder; 54-Fixing block; 55-Flexible steel strip; 56-Steel strip push block; 57-Push spring plate; 58-Fixing shell; 59-Arch-shaped concave structure ; 60-Groove; 61-Circular groove; 62-Rectangular boss; 63-Reinforcing block structure; 64-Middle boss; 65-Bent structure; 66-Formed boss; 67-Protruding structure; 68-Rectangular hole; 69-Fixing groove; 70-Elastic arm; 71-Bent structure; 72-Middle and distal rectangular hole; 73-Distal rectangular hole; 74-Two-stage boss; 75-Rectangular through hole; 76-Through hole; 77-Boss; 78-Boss; 79-Semi-circular groove; 80-Round hole. Detailed Implementation

[0064] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0065] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0068] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0069] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0070] Example 1:

[0071] Embodiment 1 of the present invention provides a crank-rotatable vascular anastomosis device that provides a good surgical field of vision. The crank-rotatable vascular anastomosis device includes a firing mechanism, a crank transmission mechanism, and a staple pushing and shaping mechanism. By driving the crank transmission mechanism through the firing mechanism, the staple pushing and shaping mechanism can be pushed to complete the shaping of the staples and vascular anastomosis. At the same time, the crank transmission mechanism can avoid the rear of the anastomosis device and the operator's hand from obstructing the surgical field of vision. Rotating the crank transmission mechanism can further assist in finding the appropriate angle for using the anastomosis device.

[0072] Specifically, such as Figure 1-25 As shown, the part closer to the surgical site is defined as proximal, and the part farther from the surgical site is defined as distal.

[0073] The firing mechanism includes a housing, a firing handle, a push block 10, and a return spring 30;

[0074] The shell comprises an upper shell 3 and a lower shell 4. Both the upper shell 3 and the lower shell 4 are elongated for easy gripping during surgery. The proximal, middle, and distal ends of the upper shell 3 and the lower shell 4 respectively contain cylinders and corresponding circular slots (26, 25, 24) for assembling and sealing the upper shell 3 and the lower shell 4. A groove 22 is provided along the length of the upper shell 3 and the lower shell 4, and rectangular slots 21 are provided on both sides of the groove. Rectangular holes are provided on the left and right sides of the proximal ends of the upper shell 3 and the lower shell 4. Rectangular holes 20 that communicate vertically are provided on the upper and lower shells near the proximal ends. Circular holes 19 are provided along the length of the proximal ends of the upper shell 3 and the lower shell 4.

[0075] The firing handle consists of a left firing handle 1 and a right firing handle 2. The rear ends of the left firing handle body 27 and the right firing handle body 28 have round holes 29. The round holes 29 are interference-fitted with the distal round hole groove 24 of the housing to limit the rotation of the left and right firing handles around the distal round hole groove 24 of the housing. The left firing handle 1 and the right firing handle 2 are installed inside the housing. The outer proximal end of the left firing handle 1 and the right firing handle 2 has a pressing structure 32 for pressing during surgical operations. The inner proximal end of the left firing handle 1 and the right firing handle 2 has a sloping groove 30 and a boss 31. The boss 31 of the left firing handle 1 and the right firing handle 2 cooperates with the rectangular grooves 21 of the upper and lower housings to limit the rotation range of the firing handles.

[0076] The push block has a left boss 33 and a right boss 34. The left boss 33 engages with the inclined groove 30 on the inner proximal side of the left firing handle, and the right boss 34 engages with the inclined groove 30 on the inner proximal side of the right firing handle. The push block 10 can be moved by the inclined groove 30 on the proximal side when pressed by the left firing handle 1 and the right firing handle 2. The push block 10 has a circular through hole 32 at its center along the proximal-distal direction, and a cylindrical boss 31 at its proximal end.

[0077] The proximal end of the return spring 30 contacts the proximal ends of the grooves in the upper and lower housings, and the distal end of the return spring 30 contacts the push block 10. The return spring 30 is used to limit the push block 10 from moving to the proximal end and to assist the push block 10 in moving backward after the push block 10 moves to the proximal end first.

[0078] The return spring 30 and the push block 10 are both installed inside the firing mechanism housing.

[0079] The crank drive mechanism includes a crank, a flexible steel sheet, a near-end connecting block, a far-end connecting block, and a connecting housing.

[0080] The crank 38 has a cylindrical rotating wheel 35 at its distal end. The cylindrical rotating wheel 35 is installed in a rectangular hole near the upper housing 3 and lower housing 4 of the firing mechanism and can rotate in the rectangular hole. The crank 38 has a boss 40 near its distal end, which has a connecting hole. The crank 40 has a rectangular through hole 43 and a circular through hole 44 along its length.

[0081] The flexible steel sheet 12 has a connecting hole at the near end and a connecting hole at the far end. The flexible steel sheet 12 is installed into the rectangular through hole 43 of the crank and can slide freely in the rectangular through hole 43.

[0082] The proximal connecting block has a circular through hole 45 along its length and an upper and lower through hole 46 at its distal end. The upper and lower through holes 46 are connected to and fixed to the proximal connecting hole of the flexible steel sheet 12. When the flexible steel sheet 12 moves, the proximal connecting block can move accordingly. The proximal connecting block has a rectangular boss 47 on its proximal bottom surface.

[0083] The distal connecting block includes an upper distal connecting block and a lower distal connecting block. The proximal ends of the upper and lower distal connecting blocks are provided with vertical connecting holes 50. The connecting holes 50 of the upper and lower distal connecting blocks are connected and fixed to the distal connecting holes of the flexible steel sheet 12, so that the distal connecting block can drive the flexible steel sheet to move. The distal end of the distal connecting block is provided with a circular groove 48. The circular groove 48 can cooperate with the cylindrical boss at the proximal end of the push block in the firing mechanism. The distal connecting block can rotate around the axis of the push block in the firing mechanism. The upper and lower distal connecting blocks are provided with semi-circular grooves 49 along the length direction. When the upper and lower distal connecting blocks are combined together, they form a circular through hole.

[0084] The connecting housing includes a left connecting housing and a right connecting housing. The proximal, middle, and distal ends of the left and right housings respectively contain cylinders (51, 52, 53) and corresponding circular slots for assembling and sealing the left and right connecting housings. During housing installation, the distal cylinder needs to first pass through the connecting hole on the distal boss of the crank and then connect with the corresponding circular slot, thereby fixing the relative positions of the left and right connecting housings and the crank.

[0085] The staple pushing and forming mechanism includes a pushing spring plate 57, a steel bar pushing block 56, a flexible steel bar 55, a fixed groove, a forming steel plate, a pushing steel plate, a fixed housing 58, a fixed block 54, a staple pushing block, and staples.

[0086] The push spring plate 57 is made of a high-elasticity steel sheet, and the proximal end of the push spring plate 57 is fixed in a groove in the lower housing of the firing mechanism.

[0087] The steel bar push block 56 is installed in the groove of the lower housing of the firing mechanism. The steel bar push block 56 can move along the axis within the groove. The distal end of the steel bar push block 56 is provided with an arc-shaped concave structure 59. The arc-shaped structure can cooperate with the push spring plate 57, thereby enabling the push spring plate 57 to drive the steel bar push block 56 to move. The proximal end of the steel bar push block 56 is provided with a circular non-through hole along the axial direction.

[0088] The flexible steel bar 55 is a highly elastic steel bar. When the flexible steel bar 55 is installed, it passes through the circular through hole of the crank in the crank transmission mechanism, the circular through hole of the near end connecting block, the upper far end connecting block and the lower far end connecting block to form a circular through hole. The flexible steel bar 55 can slide freely. The far end of the flexible steel bar 55 is installed in the circular non-through hole of the steel bar push block 56, so that the steel bar push block 56 can drive the flexible steel bar 55 to move.

[0089] The fixed groove has a groove 60 along its length, and an arc-shaped groove 61 at the bottom of the groove. The near end of the flexible steel strip 55 can slide freely in the arc-shaped groove 61. The far end of the fixed groove has a rectangular boss 62, and the middle position also has a middle boss 64. The near end of the fixed groove has a downward bending structure 65. The bottom surface of the fixed groove has a reinforcing block structure 63 to increase the overall rigidity of the fixed groove.

[0090] The far end of the formed steel sheet is provided with a fixing groove 69, which can cooperate with the rectangular boss 62 on the fixing groove body to fix the relative position of the formed steel sheet and the fixing groove body. The far end of the formed steel sheet is provided with a rectangular hole 68, and the near end of the formed steel sheet is provided with an elastic arm 70. The near end of the elastic arm 70 is provided with a certain bending structure 71, which can cooperate with the bending structure 65 of the fixing groove body. The bottom surface of the end of the bending structure 71 is provided with a forming boss 66, and the outer side of the elastic arm 70 is provided with a protruding structure 67.

[0091] The pushing steel plate can fix the fixed groove and the formed steel plate inside at the far end, while the pushing steel plate can also slide. A far end rectangular hole 73 is provided at the far end of the pushing steel plate. The rectangular hole can cooperate with the rectangular boss on the bottom surface of the near end of the near end connecting block in the crank transmission mechanism, so that the near end connecting block drives the pushing steel plate to move. A mid-far end rectangular hole 72 is provided at the middle end of the pushing steel plate.

[0092] The fixed housing has a rectangular through hole 75 inside. The upper surface of the rectangular through hole 75 has two-stage bosses 74. The first stage boss of the two-stage bosses 74 can cooperate with the rectangular hole at the far end of the pushing steel sheet, restricting the pushing steel sheet from sliding a certain distance along the first stage boss. The second stage boss of the two-stage bosses cooperates with the rectangular hole at the far end of the forming steel sheet, completely restricting the position movement of the forming steel sheet. The bottom surface of the fixed housing has a boss 77. The boss 77 has a through hole 76. The through hole can cooperate with the cylinder at the near end of the left housing in the crank transmission structure, fixing the relative position of the fixed housing and the housing in the crank transmission structure.

[0093] The right side of the fixing block is provided with a semi-circular groove 79, which allows the flexible steel strip to pass through. The upper surface of the fixing block has a certain number of protrusions 78, which are mainly used to fix the fixing groove and the formed steel sheet in the fixing housing, while allowing the pushing steel sheet to slide to a certain extent.

[0094] The distal end of the staple pusher block has a round hole 80, into which a flexible steel strip can be inserted. The staple pusher block has a certain degree of flexibility and can be bent at a certain angle. The staple is installed in the groove of the fixed groove body and can only slide along the groove under the action of the formed steel sheet.

[0095] The staples are circular in shape but have an angled notch at the tip. The notch points proximally as the staple is placed in the fixing groove, while a shaped steel plate restricts the staple's movement, allowing it to slide only along the groove of the fixing groove. During installation, multiple staples can be placed simultaneously in the groove of the fixing groove. The furthest staple contacts the staple pushing block, which ensures a tight arrangement of the staples.

[0096] Specific usage instructions include:

[0097] Before use, a sufficient number of staples are installed in the groove of the fixed slot, with the staple notch facing the proximal end. The staples drive the staple push block to move to the distal end. The staple push block drives the flexible steel bar through the round hole at the distal end to slide to the distal end through the through hole of the proximal connecting block of the crank transmission mechanism, the round through hole in the crank, the through hole in the distal connecting block, and the push block in the firing mechanism.

[0098] The distal end of the flexible steel strip is pushed to the proximal end of the steel strip pusher block in the forming mechanism through the non-through hole of the proximal end of the steel strip pusher block, which drives the steel strip pusher block to move to the distal end. The steel strip pusher block drives the steel sheet to unfold through the arc-shaped concave structure, so that the pusher steel sheet always maintains the force of rolling, and the steel strip pusher block maintains the force of moving to the proximal end.

[0099] In use, the anastomosis stapler is guided to the site of the blood vessel to be anastomosed by the proximal end of the elastic arm of the forming steel plate in the anastomosis stapler pushing and forming mechanism, and the left and right firing handles of the firing mechanism are pressed by the fingers.

[0100] The firing handle rotates around the circular slot of the housing. The inclined groove on the inner side of the proximal end of the firing handle drives the push block to move towards the proximal end through the left and right bosses of the push block. The cylindrical boss at the proximal end of the push block drives the distal connecting block to move towards the proximal end through the circular groove of the distal connecting block in the crank transmission mechanism.

[0101] At the same time, the push block compresses the return spring and generates a compressive force. The connection hole at the near end of the far end of the connecting block drives the flexible steel sheet to slide in the rectangular through hole of the crank through the connection hole at the far end of the flexible steel sheet. The connection hole at the near end of the flexible steel sheet drives the near end connecting block to move towards the near end through the upper and lower through holes at the far end of the near end connecting block.

[0102] The rectangular protrusion on the bottom proximal end of the proximal connecting block drives the forming steel sheet to move proximally through the fixing groove at the distal end of the forming steel sheet in the anastomosis push forming mechanism. The forming steel sheet can compress the elastic arm towards the center by pressing the protruding structure on the outer side of the elastic arm at the proximal end of the forming steel sheet. Under the action of the forming protrusion of the elastic arm and the bending structure at the proximal end of the fixing groove, the anastomosis staple deforms, and the tips of the notch positions approach each other, completing the anastomosis of the blood vessel. The foremost anastomosis staple is dislodged from the stapler.

[0103] After the finger releases the pressing mechanism, the push block moves to the distal end under the compression force of the return spring. The left and right bosses of the push block drive the firing handle to reset through the inclined groove on the inner side of the proximal end of the firing handle. The cylindrical boss at the proximal end of the push block drives the distal connecting block to move to the distal end through the circular groove in the distal connecting block in the crank transmission mechanism.

[0104] Simultaneously, the return spring gradually returns to its original position. The connection hole at the proximal end of the distal connecting block drives the flexible steel sheet to slide in the rectangular through hole of the crank through the connection hole at the distal end of the flexible steel sheet. The connection hole at the proximal end of the flexible steel sheet drives the proximal connecting block to move to the distal end through the upper and lower through holes at the distal end of the proximal connecting block. The rectangular boss on the bottom surface of the proximal end of the proximal connecting block drives the forming steel sheet to move to the distal end through the fixing groove at the distal end of the forming steel sheet in the forming mechanism via the matching pin. The forming steel sheet eliminates the extrusion of the protruding structure on the outer side of the elastic arm at the proximal end of the forming steel sheet, and the elastic arm returns to its original position.

[0105] In the staple pushing and forming mechanism, under the action of the pushing steel sheet coiling force, the pushing steel sheet drives the steel strip pushing block to move towards the proximal end through the arc-shaped concave structure of the steel strip pushing block. The steel strip pushing block drives the flexible steel strip to slide towards the proximal end through the pushing block in the firing mechanism, the through hole in the distal connecting block, the circular through hole in the crank, and the through hole in the proximal connecting block. The proximal end of the steel strip pushes the staple pushing block to move towards the proximal end, and the staple pushing block pushes the staple to move towards the proximal end. The staple that was originally in the second position moves to the first position.

[0106] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A crank-rotatable vascular anastomosis device that provides a good surgical field of view, characterized in that: include: The firing mechanism, crank transmission mechanism, and staple pushing and forming mechanism; The firing mechanism is configured to drive the crank transmission mechanism to push the staple pushing and forming mechanism to complete the forming of the staples and the vascular anastomosis; The crank drive mechanism is configured to avoid obstruction of the surgical field of view by the rear of the stapler and the operator's hand through the rotation of the crank, and to assist in finding the appropriate angle for the use of the stapler. The staple pushing and forming mechanism is configured to form staples and perform vascular anastomosis under the drive of a crank transmission mechanism; The firing mechanism includes a housing, a firing handle, a push block, and a return spring, with the end closer to the surgical site being the proximal end and the end farther from the surgical site being the distal end. The shell includes an upper shell and a lower shell that are connected to each other. A groove is provided along the length of the upper shell and the lower shell. Rectangular slots are provided on both sides of the groove. Rectangular holes are provided on the left and right sides near the proximal end of the upper shell and the lower shell. Rectangular holes that communicate with each other are provided on the upper and lower surfaces near the proximal end of the upper shell and the lower shell. Circular holes are provided along the length of the proximal end of the upper shell and the lower shell. The firing handle consists of a left firing handle and a right firing handle. The rear end of the left and right firing handles has a round hole, which is interference-fitted with the round hole groove of the housing. The left and right firing handles are installed inside the housing. The outer side of the proximal end of the left and right firing handles has a pressing structure. The inner side of the proximal end of the left and right firing handles has a sloping groove and a boss. The boss of the left and right firing handles fits with the rectangular grooves of the upper and lower housings. The push block has a left boss and a right boss. The left boss engages with the groove on the inner side of the proximal end of the left firing handle, and the right boss engages with the inclined groove on the inner side of the proximal end of the right firing handle. When the left and right firing handles are pressed, the push block moves through the inclined groove on the proximal end. The push block has a circular through hole at the center position along the proximal-distal direction. The proximal end of the push block has a cylindrical boss. The proximal end of the return spring contacts the groove on the upper shell and the groove on the lower shell. The distal end of the return spring contacts the push block. The crank transmission mechanism includes at least: a crank, a flexible steel sheet, a proximal connecting block, and a distal connecting block; The crank has a cylindrical rotating wheel at the far end. The cylindrical rotating wheel is used to install in the rectangular hole at the near end of the upper and lower housings of the firing mechanism and can rotate in the rectangular hole. The crank has a boss at the near end with a connecting hole. The crank has a rectangular through hole and a circular through hole along its length. The flexible steel sheet has connection holes at both the proximal and distal ends. The flexible steel sheet is installed into the rectangular through hole of the crank and can slide freely in the rectangular through hole. The proximal connecting block has a circular through hole along its length and upper and lower through holes at its distal end. The upper and lower through holes are connected to and fixed to the proximal connecting hole of the flexible steel sheet. When the flexible steel sheet moves, the proximal connecting block can move accordingly. The proximal connecting block has a rectangular boss on its proximal bottom surface. The distal connecting block includes an upper distal connecting block and a lower distal connecting block. The proximal ends of the upper and lower distal connecting blocks are provided with vertical connecting holes. The connecting holes of the upper and lower distal connecting blocks are connected and fixed to the distal connecting holes of the flexible steel sheet. The distal connecting blocks can rotate around the axis of the push block in the firing mechanism. The distal end of the distal connecting block is provided with a circular groove. The circular groove cooperates with the cylindrical boss at the proximal end of the push block in the firing mechanism. The upper and lower distal connecting blocks are provided with semi-circular grooves along their length. When the upper and lower distal connecting blocks are combined together, they form a circular through hole.

2. The crank-rotatable vascular anastomosis device that provides a good surgical field of view as described in claim 1, characterized in that: Both the upper and lower shells are elongated strips. The proximal, middle, and distal ends of the upper and lower shells respectively contain cylinders and corresponding circular slots for assembling and sealing the upper and lower shells.

3. The crank-rotatable vascular anastomosis device providing a good surgical field of view as described in claim 1, characterized in that: Both the return spring and the push block are installed inside the firing mechanism housing. The return spring is used to limit the push block from moving to the proximal end and to assist the push block in moving backward after the push block moves to the proximal end first.

4. The crank-rotatable vascular anastomosis device that provides a good surgical field of view as described in claim 1, characterized in that: The crank drive mechanism also includes: a connecting housing; The connecting housing includes a left connecting housing and a right connecting housing. The proximal, middle, and distal ends of the left and right connecting housings respectively contain cylinders and corresponding circular slots for assembling and sealing the left and right connecting housings. When installing the left and right connecting housings, the distal cylinder first passes through the connecting hole on the distal boss of the crank, and then connects with the corresponding circular slot, thereby fixing the relative positions of the left and right connecting housings and the crank.

5. The crank-rotatable vascular anastomosis device as described in claim 1, providing a good surgical field of view, characterized in that: The staple pushing and forming mechanism includes a pushing spring plate, a steel bar pushing block, a flexible steel bar, a fixing groove, a forming steel plate, a pushing steel plate, a fixing shell, a fixing block, a staple pushing block, and staples; The proximal end of the push spring plate is fixed in the groove of the lower housing of the firing mechanism. The steel bar push block is installed in the groove of the lower housing of the firing mechanism. The distal end of the steel bar push block is provided with an arc-shaped concave structure. The arc-shaped structure cooperates with the push spring plate to push the spring plate to drive the steel bar push block to move. The proximal end of the steel bar push block is provided with a circular non-through hole along the axial direction. When the flexible steel bar passes through the circular through hole of the crank in the crank transmission mechanism, the circular through hole of the near end connecting block, the upper far end connecting block and the lower far end connecting block together, a circular through hole is formed. The far end of the flexible steel bar is installed in the circular non-through hole of the steel bar push block. The fixed groove has a groove along its length, with an arc-shaped groove at the bottom. The fixed groove has a rectangular boss at the far end and a boss at the middle position. The fixed groove has a downward bending structure at the near end. The far end of the formed steel sheet is provided with a fixing groove, which cooperates with the rectangular boss on the fixing groove body. The far end of the formed steel sheet is provided with a rectangular hole, and the near end of the formed steel sheet is provided with an elastic arm. The near end of the elastic arm is provided with a bending structure that cooperates with the bending structure of the fixing groove body. The bottom surface of the end of the bending structure is provided with a forming boss, and the outer side of the elastic arm is provided with a protruding structure. The pushing steel plate fixes the fixed groove and the formed steel plate inside at the far end. The far end of the pushing steel plate is provided with a rectangular hole. The rectangular hole and the rectangular boss on the bottom surface of the near end of the connecting block in the crank transmission mechanism are engaged. The middle and far ends of the pushing steel plate are provided with rectangular holes. The fixed housing has a rectangular through hole inside, and the upper surface of the rectangular through hole has a two-stage boss. The first stage of the two-stage boss engages with the rectangular hole at the far end of the pushing steel plate, restricting the pushing steel plate from sliding along the first stage boss for a certain distance. The second stage of the two-stage boss engages with the rectangular hole at the far end of the forming steel plate, completely restricting the positional movement of the forming steel plate. The bottom surface of the fixed housing has a boss, and the boss has a through hole. The through hole engages with the cylinder at the near end of the left housing in the crank transmission structure. The right side of the fixing block is provided with a semi-circular groove that allows flexible steel bars to pass through, and the upper surface of the fixing block has a certain number of protrusions; The distal end of the staple pusher block is provided with a round hole for inserting a flexible steel strip. The staple pusher block can bend at a certain angle. The staple is installed in the groove of the fixing slot and slides only along the groove under the action of the forming steel sheet. The staples are circular in shape with an angled notch, the notch being at the tip, and are placed in the fixation groove with the notch pointing proximally.

6. The crank-rotatable vascular anastomosis device as described in claim 5, providing a good surgical field of view, characterized in that: The spring sheet is made of high-elasticity steel sheet.

7. The crank-rotatable vascular anastomosis device as described in claim 5, providing a good surgical field of view, characterized in that: During the installation of the staples, multiple staples can be placed in the groove of the fixing slot. The farthest staple contacts the staple pushing block, which ensures that the staples are closely arranged.

8. The crank-rotatable vascular anastomosis device as described in claim 5, providing a good surgical field of view, characterized in that: The steel bar can slide freely in the circular through hole of the crank, the circular through hole of the near end connecting block, the circular through hole of the upper far end connecting block and the lower far end connecting block formed by combining them in the crank transmission mechanism, driven by the steel bar pushing block.

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