Retractor assembly

Abstract

The utility model relates to the technical field of medical instruments, in particular to a retractor assembly which comprises a pair of distraction forceps, a pair of distraction forceps, a pair of distraction forceps, a pair of distraction forceps, a pair of distraction forceps and a pair of distraction forceps, and the distraction forceps comprise a first handle and a second handle which are hinged with each other; the locking device is arranged at the other ends of the first handle and the second handle and is used for fixing the distance between the end parts of the first handle and the second handle; the traction hook is detachably buckled with the side wall of the distraction plate, and the distraction plate is provided with a limiting part used for being connected with the traction hook in a clamping mode. The utility model aims to overcome the defect that in the current lateral approach lumbar vertebra surgery, a retractor needs to be pulled for many times to better open muscular tissue residues in a surgery area, so that the injury of a patient is increased. According to the utility model, the condition of repeated traction of the traction device is reduced, the exposure time of an operation area is shortened, the wound injury of a patient is reduced, and the follow-up rehabilitation and recovery effect of the patient is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to a retractor assembly. Background Art

[0002] Lateral lumbar interbody fusion (LLIF), also known as direct lateral interbody fusion (DLIF) or extreme lateral interbody fusion (XLIF or ELIF), has been widely used in the treatment of various lumbar degenerative diseases, inflammations, traumas, tumors, etc. in recent years with the development of LLIF, due to its advantages such as small trauma, short operation time, less bleeding, large bone graft area, high fusion rate, short hospital stay, few postoperative nerve complications, and quick recovery.

[0003] Lateral lumbar interbody fusion refers to a surgical technique for treating lumbar degenerative diseases, etc. through the lateral approach of the lumbar spine. According to the preferences of surgeons and the convenience of the operation, the patient can take the left lateral position or the right lateral position. After separating through the lateral skin incision to reach the retroperitoneal space, blunt dissection is performed on the surface of the psoas major muscle at this time, a guide rod is inserted step by step, and a retractor is used to separate the psoas major muscle at the anterior-middle 1 / 3 of the psoas major muscle to ensure that the lumbar plexus nerve is located at the posterolateral of the retractor.

[0004] During the process of lateral lumbar interbody fusion, tools such as retractors help to keep the surgical field area open. During the exposure of the surgical area by the retractor, since there is a certain depth between the skin incision and the surface of the lumbar vertebra, after the initial retracting blade, it is often found that muscle tissue remains on the surface of the lumbar vertebra, and the periosteal structure of the vertebra is not directly exposed at the bottom of the channel, resulting in incomplete exposure. Therefore, it is often necessary to reinsert the retractor multiple times for retraction, which undoubtedly increases the surgical exposure time, adds damage to the patient's psoas major muscle, and is not conducive to the later recovery. Therefore, how to better clean the redundant muscle tissue in the surgical area under the channel and improve the surgical exposure efficiency with only one insertion of the retractor for retraction, and reduce the excessive damage caused by postoperative muscle retraction has become an urgent problem to be solved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a retractor assembly to solve the deficiency that the retractor in the current lateral lumbar spine surgery needs to be retracted repeatedly many times to handle the residual muscle tissue in the surgical area and cause greater damage to the patient's muscle tissue. The utility model reduces the situation of repeatedly retracting the retractor many times, reduces the wound damage of the patient, and is beneficial to the subsequent rehabilitation and recovery effect of the patient.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows:

[0007] A retractor assembly, comprising:

[0008] A spreading forceps, which includes a first handle and a second handle that are hinged to each other, spreading plates respectively provided at one ends of the first handle and the second handle, and a locking device provided at the other ends of the first handle and the second handle and used to fix the distance between the ends of the first handle and the second handle;

[0009] A traction hook, which is detachably buckled with the side wall of the spreading plate, and a limiting part for clamping the traction hook is provided on the spreading plate.

[0010] The present utility model can be applied in surgical procedures such as lateral approach lumbar interbody fusion to form a surgical channel leading to the spine through the psoas muscle space path for opening a surgical window. During the application of the present utility model, the doctor controls the first handle and the second handle to realize the opening and support of the surgical window by the spreading plate. After the spreading plate opens the surgical window, the doctor can further open the residual muscle tissue and implicated periosteal tissue on the bone surface by operating the detachable traction hook. The locking device locks the opening distance of the surgical window, and then the traction hook is fixed on the spreading plate. When the traction hook is used for pulling the residual tissue, with the temporary fixation of the spreading plate, it can replace manual pulling and will not block the vision of the surgical window. In this way, when encountering a single pull, if the pulling is not in place, there is no need to repeatedly insert the retractor and repeatedly pull. By using the traction hook to complete the pulling of the remaining residual tissue, a single pull can be achieved, reducing the situation of repeatedly pulling the retractor multiple times, reducing the wound injury of the patient, and being beneficial to the subsequent recovery of the patient and the recovery effect.

[0011] Further, the traction hook includes a rod body and a hook head, and the limiting part includes oppositely arranged limiting columns, and a clamping groove for clamping the rod body is formed between the limiting columns, and the clamping groove is in interference fit with the limiting columns.

[0012] Further, the limiting columns are formed by bending elastic metal, and the minimum opening diameter a of the clamping groove is smaller than the outer diameter d of the rod body.

[0013] Further, an arc transition chamfer is provided at the opening position of the clamping groove formed by the limiting columns.

[0014] The clamping groove of the present utility model is formed by bending elastic metal with certain elasticity. The traction hook can enter the clamping groove through pressing along the opening position of the clamping groove to complete the fixation. The clamping method is more convenient and effective during the operation process, realizing rapid clamping and improving the operation efficiency.

[0015] Further, the spreading forceps further includes a first elastic member with one end fixed to the inner sidewall of the first handle and the other end abutted against the inner sidewall of the second handle, and a second elastic member with one end fixed to the inner sidewall of the second handle and the other end abutted against the inner sidewall of the first handle; the locking device includes a screw rod with one end connected to the inner sidewall of the first handle and the other end penetrating through the second handle, and an adjusting nut threadedly connected to the screw rod, and the adjusting nut is located outside the second handle.

[0016] Further, the first handle and the second handle are hinged by a first rotating shaft, and the first handle and the second handle are arranged on both sides of the axis of the first rotating shaft.

[0017] In the design of the present utility model, the first handle and the second handle are arranged on both sides of the axis of the first rotating shaft, which is to improve the convenience for doctors to perform the spreading operation during the operation. Different from the cross - setting mode of scissors, the first handle and the second handle are arranged on both sides of the axis of the first rotating shaft. In this way, when one end of the first handle and the second handle is separated from each other, the other end will approach each other. And the first handle and the second handle are respectively kept in a state where the holding ends tend to be away from each other by the mutual abutment of the first elastic member and the second elastic member, so that the end where the spreading plate is located tends to close. When the doctor performs the retraction operation, the spreading plates can be separated from each other by squeezing the holding ends of the first handle and the second handle. For doctors during the surgical operation, the pressing grip force is easier to control than the reverse pushing and pulling. After pulling to a certain position, the distance between the spreading plates can be maintained by locking the adjusting nut. Therefore, the design of the hinged mode of the first handle and the second handle of the present utility model better improves the operation convenience and effectiveness.

[0018] Further, the spreading forceps further includes a third handle, and a spreading plate provided at one end of the third handle. The other end of the third handle is respectively hinged to the first handle and the second handle by a symmetrically hinged first connecting rod and a second connecting rod. A sliding groove is provided on the third handle along the axis, and the first rotating shaft is limited in the sliding groove; when the end - to - end distance between one end of the first handle and the second handle is reduced, the spreading plates of the first handle, the second handle and the third handle are separated from each other, and when the end - to - end distance between one end of the first handle and the second handle is increased, the spreading plates of the first handle, the second handle and the third handle are closed to each other.

[0019] Setting the third handle can better expand the surgical window and form a larger window area. Therefore, through the action of the screw rod of the third handle by the first connecting rod and the second connecting rod, and the limiting action on the third handle through the sliding groove, the effect that when the end - to - end distance between one end of the first handle and the second handle is increased, the spreading plates of the first handle, the second handle and the third handle are closed to each other is achieved.

[0020] Further, the ends of the first link, the second link and the third handle are hinged to each other through a second rotating shaft.

[0021] Further, the axis planes of each spreading plate are respectively perpendicular to the axes of the first handle, the second handle and the third handle.

[0022] Further, each spreading plate is an arc-shaped plate, and the three spreading plates can be folded into a circle.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] The present utility model can be applied to form a surgical channel leading to the spine through the psoas muscle space during surgical procedures such as lateral lumbar interbody fusion surgery for opening a surgical window. During the application of the present utility model, the doctor controls the opening and support of the surgical window by the spreading plate through the first handle and the second handle. After the spreading plate opens the surgical window, the doctor can further open the residual muscle tissue and involved periosteal tissue on the bone surface by operating the detachable retractor hook. The locking device locks the opening distance of the surgical window, and then the retractor hook is fixed on the spreading plate. When the retractor hook is used for pulling the residual tissue, the temporary fixation of the spreading plate can be utilized to replace manual pulling and will not block the vision of the surgical window. In this way, when encountering a single pulling, if the pulling is not in place, there is no need to repeatedly insert the retractor and repeatedly pull. By using the retractor hook to complete the pulling of the remaining residual tissue, a single pulling can be achieved, reducing the situation of repeatedly pulling the retractor multiple times, reducing the wound injury of the patient, and being beneficial to the subsequent rehabilitation and recovery effect of the patient. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the present utility model when there are only two handles;

[0026] Figure 2 It is a schematic connection structure diagram of the retractor hook and the spreading plate of the present utility model when there are only two handles;

[0027] Figure 3 It is a front view schematic diagram of the clamping method of the limiting part and the retractor hook of the present utility model;

[0028] Figure 4 It is a cross-sectional schematic diagram of the clamping method of the limiting part and the retractor hook of the present utility model;

[0029] Figure 5 It is a schematic structural diagram of the present utility model when there are three handles;

[0030] Figure 6 It is a schematic connection structure diagram of the retractor hook and the spreading plate of the present utility model when there are three handles.

[0031] The illustration marks are explained as follows:

[0032] 11 - First handle, 12 - Second handle, 13 - Spreading plate, 14 - First elastic member, 15 - Second elastic member, 16 - First rotating shaft, 17 - Third handle, 171 - First connecting rod, 172 - Second connecting rod, 173 - Sliding groove, 2 - Locking device, 21 - Screw, 22 - Adjusting nut, 3 - Retracting hook, 31 - Rod body, 32 - Hook head, 4 - Limiting portion, 41 - Limiting post, 42 - Card slot. Specific embodiments

[0033] The present utility model will be further described below in conjunction with specific embodiments. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation on this patent; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0034] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] As Figures 1 to 2 shown, a retractor assembly includes:

[0037] A spreading forceps, the spreading forceps includes a first handle 11 and a second handle 12 that are hinged to each other, a spreading plate 13 respectively provided at one ends of the first handle 11 and the second handle 12, and a locking device 2 provided at the other ends of the first handle 11 and the second handle 12 and used to fix the distance between the ends of the first handle 11 and the second handle 12;

[0038] A retracting hook 3, the retracting hook 3 is detachably buckled to the side wall of the spreading plate 13, and a limiting portion 4 for clamping the retracting hook 3 is provided on the spreading plate 13.

[0039] This embodiment is applied in surgical procedures such as lateral lumbar interbody fusion, forming a surgical channel leading to the spine through the psoas muscle space path for opening a surgical window. During the application of the present utility model, the doctor controls the opening and support of the surgical window by the first handle 11 and the second handle 12. After the spreader plate 13 opens the surgical window, the doctor can further open the residual muscle tissue and involved periosteal tissue on the bone surface by operating the detachable retractor hook 3. The locking device 2 locks the opening distance of the surgical window, and then the retractor hook 3 is fixed on the spreader plate 13. When the retractor hook 3 performs residual tissue traction, it can utilize the temporary fixation of the spreader plate 13 to replace manual traction and will not block the view of the surgical window. In this way, when encountering a single traction, if the traction is not in place, there is no need to repeatedly insert the retractor and repeatedly perform traction. By using the retractor hook 3 to complete the traction of the remaining residual tissue, a single traction can be achieved, reducing the situation of repeatedly performing traction with the retractor multiple times, reducing the wound injury of the patient, and being beneficial to the subsequent rehabilitation and recovery effect of the patient. As Figure 2 and Figure 3 shown, the retractor hook 3 includes a rod body 31 and a hook head 32. The limiting part 4 includes oppositely arranged limiting columns 41, and a clamping groove 42 for clamping the rod body 31 is formed between the limiting columns 41. The clamping groove 42 is in interference fit with the limiting columns 41.

[0040] As Figure 4 shown, the limiting columns 41 are formed by bending elastic metal, and the minimum opening diameter a of the clamping groove 42 is smaller than the outer diameter d of the rod body 31.

[0041] As Figure 4 shown, an arc transition chamfer is provided at the opening position of the clamping groove 42 formed by the limiting columns 41.

[0042] In this embodiment, the clamping groove 42 is formed by bending elastic metal with certain elasticity. The retractor hook 3 can enter the clamping groove 42 through pressing along the opening position of the clamping groove 42 to complete fixation. The clamping method is more convenient and effective during the operation process, realizing rapid clamping and improving the operation efficiency.

[0043] Embodiment 2

[0044] This embodiment is similar to Embodiment 1, the difference being that in this embodiment:

[0045] As Figure 1As shown in the figure, the spreading forceps further includes a first elastic member 14 with one end fixed to the inner side wall of the first handle 11 and the other end abutted against the inner side wall of the second handle 12, and a second elastic member 15 with one end fixed to the inner side wall of the second handle 12 and the other end abutted against the inner side wall of the first handle 11; the locking device 2 includes a screw rod 21 with one end connected to the inner side wall of the first handle 11 and the other end passing through the second handle 12, and an adjusting nut 22 threadedly connected to the screw rod 21, and the adjusting nut 22 is located outside the second handle 12.

[0046] As Figure 1 shown, the first handle 11 and the second handle 12 are hinged by a first rotating shaft 16, and the first handle 11 and the second handle 12 are arranged on both sides of the axis of the first rotating shaft 16.

[0047] In this embodiment, the design of arranging the first handle 11 and the second handle 12 on both sides of the axis of the first rotating shaft 16 is to improve the convenience of the doctor's spreading operation during the operation. Different from the cross-setting method of scissors, the first handle 11 and the second handle 12 are arranged on both sides of the axis of the first rotating shaft 16. In this way, when one end of the first handle 11 and the second handle 12 is separated from each other, the other end will approach each other, and the first handle 11 and the second handle 12 are respectively abutted against each other through the first elastic member 14 and the second elastic member 15, maintaining that the holding ends of the first handle 11 and the second handle 12 tend to move away from each other, then the end where the spreading plate 13 is located tends to close. When the doctor performs the retraction operation, the spreading plates 13 can be separated from each other by squeezing the holding ends of the first handle 11 and the second handle 12. For the doctor during the surgical operation, applying pressure and grip force is easier to control than pushing and pulling in the reverse direction. After pulling to a certain position, the distance between the spreading plates 13 can be maintained by locking the adjusting nut 22. Therefore, the design of the hinged manner of the first handle 11 and the second handle 12 in this embodiment better improves the operation convenience and effectiveness.

[0048] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0049] Embodiment 3

[0050] This embodiment is similar to Embodiment 2, and the difference lies in that in this embodiment:

[0051] As Figure 5 and Figure 6As shown, the spreading pliers also include a third handle 17, and a spreading plate 13 arranged at one end of the third handle 17, the other end of the third handle 17 is hinged to the first handle 11 and the second handle 12 respectively through a symmetrically hinged first connecting rod 171 and a second connecting rod 172, and the third handle 17 is provided with a sliding groove 173 arranged along the axis, and the first rotating shaft 16 is limited in the sliding groove 173; when the end spacing of one end of the first handle 11 and the second handle 12 is reduced from each other, the spreading plates 13 of the first handle 11, the second handle 12 and the third handle 17 are separated from each other, and when the end spacing of one end of the first handle 11 and the second handle 12 is separated from each other, the spreading plates 13 of the first handle 11, the second handle 12 and the third handle 17 are retracted.

[0052] like Figure 6 As shown, the third handle 17 is provided to better expand the surgical window and form a larger window area. Therefore, through the action of the first connecting rod 171 and the second connecting rod 172 on the screw 21 of the third handle 17, and the limiting action of the sliding groove 173 on the third handle 17, the effect of the first handle 11, the second handle 12 and the third handle 17 that the expansion plates 13 are retracted to each other is achieved when the end distances of one end of the first handle 11 and the second handle 12 are far away from each other.

[0053] like Figure 5 As shown, the first connecting rod 171 , the second connecting rod 172 and the end of the third handle 17 are hingedly connected via a second rotating shaft 174 .

[0054] like Figure 6 As shown, the axial plane of each expansion plate 13 is perpendicular to the axes of the first handle 11 , the second handle 12 and the third handle 17 .

[0055] like Figure 6 As shown, each of the expansion plates 13 is an arc-shaped plate, and the three expansion plates 13 can be folded into a circle.

[0056] The other structures and principles of this embodiment are the same as those of Embodiment 2.

[0057] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A retractor assembly, characterized in that: include: A pair of spreading pliers, the pair comprising a first handle (11) and a second handle (12) hingedly connected to each other, a spreading plate (13) respectively arranged at one end of the first handle (11) and the second handle (12), and a locking device (2) arranged at the other end of the first handle (11) and the second handle (12) and used to fix the distance between the ends of the first handle (11) and the second handle (12); A pulling hook (3), the pulling hook (3) being detachably buckled with the side wall of the opening plate (13), and a limiting portion (4) for clamping the pulling hook (3) is provided on the opening plate (13).

2. A retractor assembly according to claim 1, characterized in that: The pulling hook (3) comprises a rod body (31) and a hook head (32); the limiting portion (4) comprises limiting posts (41) arranged opposite to each other; a clamping groove (42) for clamping the rod body (31) is formed between the limiting posts (41); the clamping groove (42) and the limiting posts (41) are in interference fit.

3. A retractor assembly according to claim 2, characterized in that: The limiting column (41) is formed by bending elastic metal, and the minimum opening diameter a of the clamping slot (42) is smaller than the outer diameter d of the rod body (31).

4. A retractor assembly according to claim 2, characterized in that: The opening position of the clamping groove (42) formed by the limiting column (41) is provided with an arc transition chamfer.

5. The retractor assembly according to claim 1, characterized in that: The spreading pliers further include a first elastic member (14) having one end fixed to the inner side wall of the first handle (11) and the other end abutting against the inner side wall of the second handle (12), and a second elastic member (15) having one end fixed to the inner side wall of the second handle (12) and the other end abutting against the inner side wall of the first handle (11); the locking device (2) includes a screw rod (21) having one end connected to the inner side wall of the first handle (11) and the other end passing through the second handle (12), and an adjusting nut (22) threadedly connected to the screw rod (21), the adjusting nut (22) being located on the outer side of the second handle (12).

6. A retractor assembly according to claim 5, characterized in that: The first handle (11) and the second handle (12) are hingedly connected via a first rotating shaft (16); the first handle (11) and the second handle (12) are arranged on both sides of an axis of the first rotating shaft (16).

7. A retractor assembly according to claim 6, characterized in that: The spreading pliers further comprise a third handle (17) and a spreading plate (13) arranged at one end of the third handle (17); the other end of the third handle (17) is respectively hinged to the first handle (11) and the second handle (12) through a symmetrically hinged first connecting rod (171) and a second connecting rod (172); the third handle (17) is provided with a sliding groove (173) arranged along the axis, and the first rotating shaft (16) is limited in the sliding groove (173); when the end distances of one end of the first handle (11) and the second handle (12) are mutually reduced, the spreading plates (13) of the first handle (11), the second handle (12) and the third handle (17) move away from each other; when the end distances of one end of the first handle (11) and the second handle (12) are mutually moved away, the spreading plates (13) of the first handle (11), the second handle (12) and the third handle (17) move toward each other.

8. A retractor assembly according to claim 7, characterized in that: The first connecting rod (171), the second connecting rod (172) and the end of the third handle (17) are hingedly connected via a second rotating shaft (174).

9. The retractor assembly according to claim 7, characterized in that: The axial plane of each opening plate (13) is respectively perpendicular to the axes of the first handle (11), the second handle (12) and the third handle (17).

10. The retractor assembly according to claim 7, characterized in that: Each of the opening plates (13) is an arc-shaped plate, and the three opening plates (13) can be folded into a circle.

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