A traction dilation retractor appliance for minimally invasive atrial surgery

Abstract

The present application relates to the field of minimally invasive surgery auxiliary device, specifically to a traction and expansion retractor device for atrial minimally invasive surgery, which comprises a pull rod for traction of the wound, and the pull rod is provided with a push piece at one end, further comprising: an expansion mechanism, a plurality of pull rods are arranged on the expansion mechanism, and the expansion mechanism drives each pull rod to traction the wound to expand the wound under the drive of the control assembly; an everted mechanism, the expansion mechanism is provided with an everted mechanism corresponding to the pull rod, and the expansion mechanism drives the pull rod to traction the wound at the same time, and drives the everted mechanism to turn the wound outward with the push piece; a liquid suction mechanism, the expansion mechanism drives the pull rod to traction the wound at the same time, and drives the liquid suction mechanism to absorb and remove the body fluid at the push piece and the wound surface. The traction and expansion retractor device for atrial minimally invasive surgery, through the expansion mechanism driving each pull rod to traction the wound to expand the wound, is simple and convenient to operate, and reduces the damage risk of wound expansion.

Description

Technical Field

[0001] This invention relates to the field of minimally invasive surgical aids, specifically a traction dilation hook device for minimally invasive atrial surgery. Background Technology

[0002] During minimally invasive cardiac surgery, retractor devices are used to widen the incision to obtain a view window that facilitates intracardiac operations.

[0003] Currently, minimally invasive surgery uses a small intercostal incision and a trocar-like retractor for opening the wound. This results in limited visibility, and many surgeons are still not accustomed to using thoracoscopic surgery, preferring direct visualization. Therefore, the limited field of vision caused by the trocar necessitates assistants to change the direction of traction, leading to frequent surgical manipulations and making it difficult to uniformly apply traction forces in different directions, increasing the risk of wound damage. Furthermore, it cannot effectively obtain a consistently sized surgical window. Given that cardiac surgery requires excellent surgical visibility, we propose a traction dilation retractor for minimally invasive atrial surgery. Summary of the Invention

[0004] The purpose of this invention is to provide a traction dilation retractor device for minimally invasive atrial surgery, thereby solving the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a traction dilation retractor device for minimally invasive atrial surgery, comprising a pull rod for traction of the incision, wherein one end of the pull rod is provided with a lever, and further comprising:

[0005] The expansion mechanism is equipped with multiple levers, and under the drive of the control components, the expansion mechanism drives each lever to pull on the wound, thereby expanding and enlarging the wound.

[0006] The eversion mechanism and the expansion mechanism are equipped with an eversion mechanism corresponding to the pull rod. The expansion mechanism drives the pull rod to pull the wound while simultaneously driving the eversion mechanism to move the paddle to evert the wound outward.

[0007] The suction mechanism and the expansion mechanism drive the pull rod to pull the wound while simultaneously driving the suction mechanism to absorb and remove the body fluid from the cut surface of the wound.

[0008] Preferably, the expansion mechanism includes multiple arc-shaped connecting rods, and the number of connecting rods is the same as the number of arc-shaped connecting rods. The multiple arc-shaped connecting rods can be connected end to end to form a complete ring. The two ends of the arc-shaped connecting rods are respectively hinged to a pump cylinder and a slide rod. The slide rod between two adjacent arc-shaped connecting rods is inserted into the corresponding pump cylinder. A piston plate is slidably connected inside the pump cylinder. One end of the slide rod is fixedly connected to the piston plate.

[0009] Preferably, the operating assembly comprises a bottom plate, and a pump wheel and a hydraulic oil box are fixed on the bottom plate, a liquid pipe I is fixed and communicated on the peripheral wall of the pump wheel, one end of the liquid pipe I is communicated with the hydraulic oil box, and the other end is communicated with each pump barrel I through a plurality of liquid pipes II.

[0010] Preferably, the expansion mechanism further comprises a plurality of seat plates corresponding to the pull rods, supports are fixed on the seat plates, and the supports are fixedly connected with the pull rods.

[0011] Preferably, two gear wheels I are rotationally connected to the side of the seat plate away from the support, a sliding rod II is fixed on the gear wheel I, the sliding rod II is inserted and slidingly connected in a sliding barrel, one end of the sliding rod II in the sliding barrel is connected to one end inside the sliding barrel through a spring I, and the two sliding barrels are respectively hingedly connected to the end portions of the opposite ends of the adjacent two arc-shaped connecting rods.

[0012] Preferably, the everted mechanism comprises a gear rack I penetrating and slidingly connected on the seat plate, the two gear wheels I are respectively located on the two sides of the gear rack I, and the two gear wheels I are respectively meshingly connected with the gear rack I.

[0013] Preferably, the end of the pull rod away from the support is hingedly connected with the middle portion of the paddle, a wire sleeve is fixed on the pull rod, a pull rope is inserted in the wire sleeve, one end of the pull rope is connected with the gear rack I, the other end is connected with the upper end of the paddle, and the upper end of the paddle is connected with the pull rod through a spring II.

[0014] Preferably, a pump barrel II is fixed on the bottom plate, a piston plate II is slidingly connected in the pump barrel II, a gear rack II is fixed on the upper surface of the piston plate II, the gear rack II penetrates and slidingly connects on the upper end wall of the pump barrel II, and the bottom surface of the piston plate II is connected with the internal bottom surface of the pump barrel II through a spring III.

[0015] Preferably, a shaft support I is fixed on the pump barrel II, a shaft rod is rotationally connected to the shaft support I, the two ends of the shaft rod are respectively coaxially fixedly connected with a multi-rib rod and an inner ring of a ratchet wheel, the outer ring of the ratchet wheel is meshingly connected with the gear rack II, a shaft support II is fixed on the hydraulic oil box, a pipe shaft is rotationally connected to the shaft support II, the pipe shaft can also slide horizontally on the shaft support II, the multi-rib rod is inserted and slidingly connected in the pipe shaft, a gear wheel II and a gear wheel IV are coaxially fixed on the pipe shaft, a gear wheel III is coaxially fixed on the impeller shaft of the pump wheel, and the gear wheel III is meshingly connected with the gear wheel II and the gear wheel IV.

[0016] Preferably, the liquid suction mechanism comprises a negative pressure box fixed on the bottom plate and a medical adhesive pad fixed on the push piece, the upper end wall of the negative pressure box is penetrated and communicated with a column pipe, and the upper end of the column pipe is connected with a gas pipe three, the negative pressure box is communicated with a pump cylinder two through a gas pipe two, the one-way valve two is connected on the gas pipe two, the conducting direction of the one-way valve two points to the inside of the pump cylinder two, the side wall of the pump cylinder two is connected with a one-way valve one, and the conducting direction of the one-way valve one points to the outside of the pump cylinder two, the medical adhesive pad is provided with a cavity, the gas pipe three is communicated with each cavity through a plurality of gas pipes one, and a plurality of air holes are formed on the surface of the medical adhesive pad which is attached to the wound, and the air holes are communicated with the cavities.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] In the present application, the expansion mechanism drives each pull rod to pull the wound to expand the wound, so that a clear view for operation is obtained, the operation is simple and convenient, and no additional assistant is needed to ensure that the traction force in each direction remains the same, reduce the risk of damage to the wound expansion, and the expansion mechanism drives the pull rod to pull the wound while driving the eversion mechanism to drive the push piece to turn the wound outward, so that the wound is automatically turned outward when the push piece pulls and expands the wound, thereby further increasing the space inside the wound, facilitating the entry of instruments into the atrium from the wound, and improving the expansion effect of the wound.

[0019] In the present application, the expansion mechanism drives the pull rod to pull the wound while driving the liquid suction mechanism to absorb and remove the body fluid at the wound surface, so that the body fluid exuded during compression is automatically pumped out when the push piece pulls and expands the wound, reducing the manual operation on the wound and playing a protective role, and reducing the labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a general assembly structure diagram of the present application;

[0021] Figure 2 It is a cross-sectional structure diagram of the control assembly in the present application;

[0022] Figure 3 It is Figure 1 the enlarged cross-sectional structure diagram of A in the present application;

[0023] Figure 4 It is Figure 1 the cross-sectional structure diagram of B-B in the present application;

[0024] Figure 5 It is Figure 4 the enlarged cross-sectional structure diagram of C in the present application.

[0025] In the figure: 1, control assembly; 2, liquid pipe one; 3, arc connecting rod; 4, pump cylinder one; 5, sliding rod one; 6, support; 7, pull rod; 8, push piece; 9, piston plate one; 10, liquid pipe two; 11, sliding cylinder; 12, spring one; 13, sliding rod two; 14, gear one; 15, rack one; 16, pull rope; 17, seat plate; 18, wire sleeve; 19, spring two; 20, medical adhesive pad; 21, cavity; 22, air hole; 23, air pipe one; 24, hydraulic oil box; 25, pump wheel; 26, one-way valve one; 27, spring three; 28, bottom plate; 29, rack two; 30, ratchet wheel; 31, multi-rib rod; 32, shaft support one; 33, shaft rod; 34, pipe shaft; 35, gear two; 36, gear three; 37, gear four; 38, shaft support two; 39, piston plate two; 40, air pipe two; 41, column pipe; 42, one-way valve two; 43, air pipe three; 44, negative pressure box; 45, pump cylinder two. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0027] Please refer to Figures 1 to 5 The present application provides a technical solution: a traction and expansion retractor device for atrial minimally invasive surgery, comprising a pull rod 7 for traction of the incision, and the pull rod 7 is provided with a push piece 8 at one end, further comprising:

[0028] An expansion mechanism is provided with a plurality of pull rods 7, and the expansion mechanism drives each pull rod 7 to traction the incision under the drive of the control assembly 1 to expand and enlarge the incision;

[0029] An everted mechanism is provided on the expansion mechanism corresponding to the pull rod 7, and the expansion mechanism drives the pull rod 7 to traction the incision at the same time to drive the everted mechanism to turn the incision outward with the push piece 8;

[0030] A liquid suction mechanism is driven by the expansion mechanism to drive the pull rod 7 to traction the incision at the same time to drive the liquid suction mechanism to absorb and remove the body fluid at the incision surface with the push piece 8.

[0031] In the embodiment, the expanding mechanism comprises a plurality of arc-shaped connecting rods 3, and the number of the pull rods 7 is the same as that of the arc-shaped connecting rods 3. The plurality of arc-shaped connecting rods 3 are connected end to end to form a complete ring. The two ends of the arc-shaped connecting rod 3 are hingedly connected to the pump barrel 4 and the sliding rod 5, respectively. The sliding rod 5 between two adjacent arc-shaped connecting rods 3 is inserted into the corresponding pump barrel 4. The pump barrel 4 is slidably connected with a piston plate 9. One end of the sliding rod 5 is fixedly connected with the piston plate 9. The control assembly 1 comprises a bottom plate 28. The pump wheel 25 and the hydraulic oil box 24 are fixedly connected to the bottom plate 28. The circumferential wall of the pump wheel 25 is fixedly connected with the liquid pipe 2. One end of the liquid pipe 2 is connected with the hydraulic oil box 24, and the other end is connected with each pump barrel 4 through a plurality of liquid pipes 10. The pump barrel 2 45 is fixedly connected to the bottom plate 28. The piston plate 2 39 is slidably connected in the pump barrel 2 45. The rack 2 29 is fixedly connected to the upper surface of the piston plate 2 39. The rack 2 29 penetrates and is slidably connected to the upper end wall of the pump barrel 2 45. The bottom surface of the piston plate 2 39 is connected with the inner bottom surface of the pump barrel 2 45 through the spring 2 7. The shaft support 1 32 is fixedly connected to the pump barrel 2 45. The shaft rod 33 is rotatably connected to the shaft support 1 32. The two ends of the shaft rod 33 are coaxially fixedly connected with the multi-prong rod 31 and the inner ring of the ratchet wheel 30, respectively. The outer ring of the ratchet wheel 30 is meshingly connected with the rack 2 29. The shaft support 2 38 is fixedly connected to the hydraulic oil box 24. The pipe shaft 34 is rotatably connected to the shaft support 2 38. The pipe shaft 34 can also slide horizontally on the shaft support 2 38. The multi-prong rod 31 is inserted into and slidably connected with the pipe shaft 34. The gear 2 35 and the gear 3 7 are coaxially fixedly connected to the pipe shaft 34. The gear 3 6 is coaxially fixedly connected to the impeller shaft of the pump wheel 25. The gear 3 6 is meshingly connected with the gear 2 35 and the gear 3 7, respectively.

[0032] In the embodiment, the expanding mechanism further comprises a plurality of seat plates 17 corresponding to the pull rods 7. The support 6 is fixedly connected to the seat plate 17. The pull rod 7 is fixedly connected to the support 6. Two gear wheels 1 4 are rotatably connected to the side of the seat plate 17 away from the support 6. The sliding rod 2 13 is fixedly connected to the gear wheel 1 4. The sliding rod 2 13 is inserted into and slidably connected with the sliding barrel 1 1. One end of the sliding rod 2 13 in the sliding barrel 1 1 is connected with the other end in the sliding barrel 1 1 through the spring 1 2. The two sliding barrels 1 1 are hingedly connected to the opposite end portions of the adjacent two arc-shaped connecting rods 3.

[0033] In the embodiment, the evert mechanism comprises a rack 1 5 penetrating and slidably connected to the seat plate 17. The two gear wheels 1 4 are located on the two sides of the rack 1 5 and are meshingly connected with the rack 1 5, respectively. One end of the pull rod 7 away from the support 6 is hingedly connected with the middle portion of the push piece 8. The pull rod 7 is fixedly connected with the wire sleeve 1 8. The pull rope 1 6 is inserted into the wire sleeve 1 8. One end of the pull rope 1 6 is connected with the rack 1 5, and the other end is connected with the upper end of the push piece 8. The upper end of the push piece 8 is connected with the pull rod 7 through the spring 2 19.

[0034] In this embodiment, the liquid suction mechanism includes a negative pressure box 44 fixed on the bottom plate 28 and a medical adhesive pad 20 fixed on the push piece 8, the upper end wall of the negative pressure box 44 is penetrated and communicated with a column pipe 41, the upper end of the column pipe 41 is connected with a gas pipe three 43, the negative pressure box 44 is communicated with a pump cylinder two 45 through a gas pipe two 40, the gas pipe two 40 is connected with a one-way valve two 42, the one-way valve two 42 is directed to the inside of the pump cylinder two 45, the side wall of the pump cylinder two 45 is connected with a one-way valve one 26, the one-way valve one 26 is directed to the outside of the pump cylinder two 45, the medical adhesive pad 20 is provided with a cavity 21, the gas pipe three 43 is communicated with each cavity 21 through a plurality of gas pipes one 23, and the medical adhesive pad 20 is provided with a plurality of air holes 22 on the surface combined with the wound, and the air holes 22 are communicated with the cavities 21.

[0035] The working principle and advantages of the present application are as follows:

[0036] As shown in Figure 1 and Figure 4 , after the minimally invasive wound of the patient is opened, each push piece 8 is inserted into the wound, then as shown in Figure 2 and Figure 3 , the gear four 37 is connected with the gear three 36 in the initial state, the rack two 29 is pressed down multiple times to drive the piston plate two 39 to move downward, and the downward movement of the rack two 29 drives the shaft rod 33 to rotate through the ratchet 30, so that the shaft rod 33 drives the impeller in the pump wheel 25 to rotate through the multi-rib rod 31, the pump wheel 25, the hydraulic oil box 24, the liquid pipe two 10, the pump cylinder one 4, the piston plate one 9, the slide rod one 5, the arc-shaped connecting rod 3, the slide cylinder 11, the slide rod two 13, the bracket 6, the pull rod 7, and the push piece 8, and the pump wheel 25 drives the hydraulic oil in the hydraulic oil box 24 to be pumped out through the liquid pipe one 2 and delivered into each pump cylinder one 4 through each liquid pipe two 10, the hydraulic oil in the pump cylinder one 4 increases to drive the slide rod one 5 to move out of the pump cylinder one 4 through the piston plate one 9, so that each arc-shaped connecting rod 3 moves away from each other, and then the arc-shaped connecting rod 3 exerts a pulling force on the seat plate 17 through the slide cylinder 11 and the slide rod two 13, the seat plate 17 exerts a pulling force on the push piece 8 through the bracket 6 and the pull rod 7 after being subjected to the pulling force, each push piece 8 is expanded and enlarged in different directions, so as to obtain a clear field of view, the operation is simple and convenient, and no additional assistant is needed, the traction force in each direction is kept the same, and the damage risk of wound expansion is reduced.

[0037] As described above, the slide rod two 13 is connected with the inside of the slide cylinder 11 through the spring one 12, and the spring one 12 plays a buffering role, so as to avoid the damage caused by the sudden change of the force on the wound due to the subconscious movement of the patient during operation.

[0038] In the process of the mutual moving away of the arc-shaped connecting rods 3, the angle between the two slide rods 13 on the seat plate 17 becomes larger, so that the two gear wheels 14 drive the gear racks 15 to exert pulling force on the pull rope 16, the pull rope 16 exerts pulling force on the upper end of the paddle 8, the upper end of the paddle 8 compresses the spring 19, the spring 19 obtains a restoring force, and then the paddle 8 automatically rolls outwards when it pulls and expands the wound, so that the space inside the wound is further increased, the instrument is facilitated to enter the atrium from the wound, and the expansion effect on the wound is improved.

[0039] As mentioned above, the gear rack 29 is lowered at the same time, the spring 27 is compressed, the spring 27 obtains a restoring force, and after the hand is released, the piston plate 39 drives the gear rack 29 to move upwards under the action of the restoring force of the spring 27, in this process, the gear rack 29 cannot drive the shaft rod 33 to rotate through the ratchet wheel 30, so that the wound is intermittently pulled and expanded.

[0040] In the process of the upward and downward movement of the piston plate 39, the piston plate 39 alternately exerts suction force and compression force on the pump cylinder 45, because the one-way valve 26 is directed to the outside of the pump cylinder 45, and the one-way valve 42 is directed to the inside of the pump cylinder 45, so that the pump cylinder 45 continuously draws out the air in the negative pressure box 44 through the air pipe 40, and discharges it through the one-way valve 26, so that the air pressure in the negative pressure box 44 is reduced, so that the column pipe 41 exerts suction force on the container cavity 21 through the air pipe 43 and the air pipe 23, the suction force absorbs the body fluid such as blood and tissue fluid exuded from the wound through the air hole 22 and collects it in the negative pressure box 44, so that the body fluid exuded during compression is automatically sucked and discharged when the paddle 8 pulls and expands the wound, the artificial operation on the wound is reduced, the protection effect is achieved, and the labor intensity is reduced.

[0041] After the operation is finished, the pipe shaft 34 is pulled to make the gear two 35 and the gear three 36 meshed, then the rack two 29 is pressed down for many times to make the rack two 29 drive the piston plate two 39 to move down, and the downward movement of the rack two 29 drives the shaft rod 33 to rotate through the ratchet 30, so that the shaft rod 33 drives the pipe shaft 34 to rotate through the multi-edge rod 31, and then the pipe shaft 34 drives the impeller in the pump wheel 25 to rotate reversely through the gear two 35 and the gear three 36, so that the pump wheel 25 draws the hydraulic oil in each pump cylinder one 4 out through the liquid pipe one 2 and each liquid pipe two 10 and transports the hydraulic oil into the hydraulic oil box 24 through the liquid pipe one 2, and after the hydraulic oil in the pump cylinder one 4 is reduced, the piston plate one 9 drives the slide rod one 5 to move to the inside of the pump cylinder one 4 and reset, so that the arc-shaped connecting rods 3 are close to each other, and then the arc-shaped connecting rods 3 exert a pushing force on the seat plate 17 through the slide cylinder 11 and the slide rod two 13, the seat plate 17 exerts a pushing force on the tab 8 through the support 6 and the pull rod 7 after being subjected to the pushing force, so that the tabs 8 are close to each other and do not pull the wound, and then the tabs 8 can be taken out from the wound, which is simple and convenient to operate and practical and reliable.

[0042] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the foregoing embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0043] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A traction dilating retractor device for atrial minimally invasive surgery, comprising a pulling rod (7) for traction of the incision, and a tab (8) is arranged at one end of the pulling rod (7), characterized in that: Also include: Expansion mechanism, a plurality of pull rods (7) are arranged on the expansion mechanism, and the expansion mechanism drives each pull rod (7) to pull the wound to make the wound expand and become larger under the drive of the operating assembly (1); Eversion mechanism, the expansion mechanism is provided with the eversion mechanism corresponding to the pull rod (7), and the expansion mechanism drives the pull rod (7) to pull the wound at the same time to drive the eversion mechanism to turn the wound outward with the push piece (8); Liquid suction mechanism, the expansion mechanism drives the pull rod (7) to pull the wound at the same time to drive the liquid suction mechanism to absorb and remove the body fluid between the push piece (8) and the wound surface; The expansion mechanism includes a plurality of arc-shaped connecting rods (3), and the number of pull rods (7) is the same as that of arc-shaped connecting rods (3), a plurality of arc-shaped connecting rods (3) can be connected end to end to form a complete ring, both ends of the arc-shaped connecting rod (3) are hingedly connected with pump cylinder one (4) and slide rod one (5) respectively, the slide rod one (5) between the adjacent two arc-shaped connecting rods (3) is inserted into the corresponding pump cylinder one (4), and the piston plate one (9) is slidably connected in the pump cylinder one (4), one end of the slide rod one (5) is fixedly connected with the piston plate one (9). The operating assembly (1) includes a bottom plate (28), and the pump wheel (25) and the hydraulic oil box (24) are fixed on the bottom plate (28), the peripheral wall of the pump wheel (25) is fixedly connected with the liquid pipe one (2) and communicates with the liquid pipe one (2), one end of the liquid pipe one (2) communicates with the hydraulic oil box (24), and the other end communicates with each pump cylinder one (4) through a plurality of liquid pipe two (10).

2. A traction dilating retractor device for minimally invasive surgery of the atrium according to claim 1, wherein: The expansion mechanism further includes a plurality of seat plates (17) corresponding to the pull rod (7), the seat plate (17) is fixed with a support (6), and the support (6) is fixedly connected with the pull rod (7).

3. A traction dilating retractor device for minimally invasive surgery of the atrium according to claim 2, wherein: Two gear one (14) are rotatably connected on the side of the seat plate (17) away from the support (6), the gear one (14) is fixedly connected with the slide rod two (13), the slide rod two (13) is inserted and slidably connected in the slide cylinder (11), one end of the slide rod two (13) in the slide cylinder (11) is connected with one end of the slide cylinder (11) through the spring one (12), and the two slide cylinders (11) are hingedly connected at the opposite end of the adjacent two arc-shaped connecting rods (3).

4. A traction dilating retractor device for minimally invasive heart surgery according to claim 3, wherein: The eversion mechanism includes a rack one (15) penetrating and slidably connected on the seat plate (17), the two gear one (14) are located on the two sides of the rack one (15), and the two gear one (14) are respectively meshed with the rack one (15).

5. A traction dilating retractor device for minimally invasive surgery of the atrium according to claim 4, wherein: One end of the pull rod (7) away from the support (6) is hingedly connected with the middle part of the push piece (8), the pull rod (7) is fixedly connected with the wire sleeve (18), the pull rope (16) is inserted in the wire sleeve (18), one end of the pull rope (16) is connected with the rack one (15), the other end is connected with the upper end of the push piece (8), and the upper end of the push piece (8) is connected with the pull rod (7) through the spring two (19).

6. A traction dilating retractor device for minimally invasive heart surgery according to claim 1, wherein: The bottom plate (28) is fixed with a pump cylinder two (45), and the pump cylinder two (45) is slidably connected with a piston plate two (39), the upper surface of the piston plate two (39) is fixed with a rack two (29), and the rack two (29) penetrates and is slidably connected on the upper end wall of the pump cylinder two (45), and the bottom surface of the piston plate two (39) is connected with the inner bottom surface of the pump cylinder two (45) through a spring three (27).

7. A traction dilating retractor device for minimally invasive heart surgery according to claim 6, wherein: The pump cylinder two (45) is fixed with a shaft support one (32), and the shaft support one (32) is fixedly connected with a shaft rod (33) in rotation, the both ends of the shaft rod (33) are coaxially fixedly connected with a multi-rib rod (31) and an inner ring of a ratchet wheel (30) respectively, the outer ring of the ratchet wheel (30) is meshingly connected with the rack two (29), the hydraulic oil box (24) is fixed with a shaft support two (38), and the shaft support two (38) is fixedly connected with a pipe shaft (34) in rotation, the pipe shaft (34) can also slide horizontally on the shaft support two (38), the multi-rib rod (31) is inserted and slidably connected in the pipe shaft (34), the pipe shaft (34) is coaxially fixedly connected with a gear two (35) and a gear four (37), and the impeller shaft of the pump wheel (25) is coaxially fixedly connected with a gear three (36), the gear three (36) is meshingly connected with the gear two (35) and the gear four (37) respectively.

8. A traction dilating retractor device for minimally invasive heart surgery according to claim 6, wherein: The liquid suction mechanism is fixed with a negative pressure box (44) on the bottom plate (28) and a medical adhesive pad (20) on the dial piece (8), the upper end wall of the negative pressure box (44) penetrates and is communicated with a column pipe (41), and the upper end of the column pipe (41) is connected with an air pipe three (43), the negative pressure box (44) is communicated with the pump cylinder two (45) through an air pipe two (40), and the air pipe two (40) is connected with a one-way valve two (42), the one-way valve two (42) is directed to the inside of the pump cylinder two (45), the side wall of the pump cylinder two (45) is connected with a one-way valve one (26), and the one-way valve one (26) is directed to the outside of the pump cylinder two (45), the medical adhesive pad (20) is provided with a cavity (21), the air pipe three (43) is communicated with each cavity (21) through a plurality of air pipes one (23), and the medical adhesive pad (20) is provided with a plurality of air holes (22) on the surface attached to the wound, and the air holes (22) are communicated with the cavities (21).

Images