A sternal retractor

Abstract

The present invention relates to the technical field of medical devices and discloses a sternal retractor, which is designed to include two retractor rods parallel to each other, a connecting part connecting the two retractor rods, and a spreading piece fixed on the retractor rod at one end away from the connecting part. The connecting part includes a connecting rod and a sliding sleeve slidably arranged on the connecting rod. A disposable fixing part is also provided between the connecting rod and the sliding sleeve. By redesigning the connection structure of the traditional retractor rod, a connecting part consisting of a connecting rod, a sliding sleeve and a disposable fixing part is used to connect the two retractor rods, and a complex fixing structure is integrated into a disposable fixing part with low consumables and easy to replace. After the operation is completed, the disposable fixing part can be disassembled and disposed of. Except for the disposable fixing part, the rest of the retractor has no complex structure and is very easy to clean and disinfect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a sternal retractor. Background Art

[0002] During thoracotomy, a median sternotomy is often performed. Simply put, the sternum is split vertically in half. After this incision, it is often necessary to stabilize the sternum for easier surgical access. This is how retractors, used to hold the sternum open and secure, came into being. A sternal retractor is a medical device used in thoracic surgery. Its primary function is to help the surgeon maintain a wider sternum during surgery, providing a better field of view and operating space.

[0003] The current sternal retractor mainly includes a pulling part consisting of two pulling rods parallel to each other and a connecting part connecting the two pulling rods. The connecting part is similar to a gear rack structure. One of the two pulling rods is fixed to one end of the "rack", and the other pulling rod is mounted on the "rack" through a sliding sleeve. A gear that cooperates with the rack is provided in the sliding sleeve. By locking the rotation of the gear, the two pulling rods are transformed from a sliding state to a fixed state. Although the current sternal retractor has a simple overall structure and is easy to operate, the rack structure is very troublesome to clean after surgery. The exposed tooth structure also has the risk of scratching surrounding tissues. The structure that is even more difficult to clean is the gear part set in the sliding sleeve, which causes great trouble to the cleaning of the equipment after surgery. In general, although the existing sternal retractor has a simple structure and is easy to use, it is very troublesome to clean after use. Summary of the Invention

[0004] The present invention aims to provide a sternal retractor to solve the problem of difficulty in postoperative cleaning of existing retractors.

[0005] The present invention is achieved through the following technical solutions:

[0006] A sternal retractor comprises two retractor rods parallel to each other, a connecting portion connecting the two retractor rods, and a stretching piece fixed on the retractor rod at one end away from the connecting portion, wherein the stretching piece is detachably fixed to the retractor rod, the connecting portion comprises a connecting rod and a sliding sleeve slidably arranged on the connecting rod, one end of the connecting rod is fixed to one end of one of the retractor rods, and the same end of the other retractor rod is fixed with a sliding sleeve, and a disposable fixing part is also provided between the connecting rod and the sliding sleeve, and when the two retractor rods move towards each other, the disposable fixing part can automatically lock and fix the connecting rod and the sliding sleeve, and the disposable fixing part comprises a disposable locking strip fixed to the connecting rod and a locking device fixed to the sliding sleeve.

[0007] In one possible design, the disposable locking strip includes a rack portion, a fixing protrusion and a mounting sleeve portion, the fixing protrusion and the mounting sleeve portion are fixed at different ends of the rack portion, and one side of the rack portion is evenly provided with protruding teeth.

[0008] In one possible design, a locking strip mounting groove is provided on the connecting rod, and a socket protrusion is fixed to the end of the connecting rod away from the socket protrusion. The end of the locking strip mounting groove away from the socket protrusion is also provided with a locking strip fixing hole passing through the connecting rod. The locking strip mounting groove is used to accommodate the rack part, the socket protrusion can be socketed and matched with the mounting sleeve part, and the locking strip fixing hole can be fixed and matched with the fixing protrusion.

[0009] In one possible design, the locker includes a locker body, a rolling gear column and an elastic sheet portion. A groove is provided on the locker body, and the rolling gear column and the elastic sheet portion are provided in the groove. The elastic sheet portion is fixed to the locker body, and the rolling gear column rolls in the groove. A toothed inclined surface is provided on the locker body at the groove, and one end of the elastic sheet portion contacts the rolling gear column and drives the rolling gear column close to the toothed inclined surface.

[0010] In a possible design, the toothed inclined surface is provided with convex tooth features identical to those of the rack portion.

[0011] In a possible design, the locking device fixing hole is opened on the sliding sleeve, and all the mounting round tables are fixed on the locking device body. The locking device is installed and fixed in the sliding sleeve through the cooperation between the mounting round tables and the locking device fixing holes.

[0012] In a possible design, the cross-section of the expansion piece in the length direction of the retraction rod is S-shaped, the retraction rod is provided with the positioning slot at the position where the expansion piece is fixed, and the expansion piece is also provided with a hook.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] 1. The present invention redesigns the connection structure of the traditional retractor rod and adopts a connection part composed of a connecting rod, a sliding sleeve and a disposable fixing part to connect the two retractor rods. The complex fixing structure is integrated into a disposable fixing part with less consumables and easy to replace. After the operation is completed, the disposable fixing part can be disassembled and disposed of. Except for the disposable fixing part, the rest of the retractor has no complex structure, and is very easy to clean and disinfect. There is no dead corner for cleaning, which can effectively ensure the hygienic conditions of the operation.

[0015] 2. The present invention is simpler and more convenient to operate when expanding the sternum, and the force of the sternum expansion can be more realistically felt, which can better prevent tissue damage caused by excessive force during expansion and ensure good healing after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention after removing the disposable locking strip;

[0019] Figure 3 This is a schematic structural diagram of a disposable locking strip in an embodiment of the present invention;

[0020] Figure 4 A top view of the present invention;

[0021] Figure 5 for Figure 4 Cross-sectional view at AA in the middle;

[0022] Figure 6 for Figure 4 Cross-sectional view at CC.

[0023] The reference numerals represent: 1-pull-off rod, 101-positioning slot, 2-connecting part, 201-connecting rod, 2011-locking strip fixing hole, 2012-locking strip mounting slot, 2013-sleeving protrusion, 202-sliding sleeve, 2021-locking device fixing hole, 3-spreading piece, 301-hook, 4-disposable locking strip, 401-rack part, 402-fixing protrusion, 403-mounting sleeve part, 5-locking device body, 501-toothed inclined surface, 6-rolling gear column, 7-elastic sheet part. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0025] Examples, such as Figures 1 to 6As shown, this embodiment includes two mutually parallel retraction rods 1, a connecting portion 2 connecting the two retraction rods 1, and a spreading piece 3 fixed to the retraction rods 1 at one end away from the connecting portion 2. The spreading piece 3 is detachably fixed to the retraction rods 1. The connecting portion 2 includes a connecting rod 201 and a sliding sleeve 202 slidably disposed on the connecting rod 201. One end of the connecting rod 201 is fixed to one end of one of the retraction rods 1, and the sliding sleeve 202 is fixed to the same end of the other retraction rod 1.

[0026] A disposable fixing part is also provided between the connecting rod 201 and the sliding sleeve 202. When the two retraction rods 1 move towards each other, the disposable fixing part can automatically lock and fix the connecting rod 201 and the sliding sleeve 202. In use, after the sternum is expanded by using the two retraction rods 1, the disposable fixing part can prevent the two retraction rods 1 from moving towards each other, thereby keeping the sternum in an expanded state. The disposable fixing part includes a disposable locking strip 4 fixed to the connecting rod 201 and a locker fixed to the sliding sleeve 202.

[0027] In this embodiment, the disposable locking strip 4 includes a rack portion 401, a fixing protrusion 402 and a mounting sleeve portion 403. The fixing protrusion 402 and the mounting sleeve portion 403 are respectively fixed at different ends of the rack portion 401. One side of the rack portion 401 is evenly provided with protruding teeth to increase the friction of the surface. Its specific structure can refer to the tooth structure on the plastic cable tie.

[0028] Furthermore, in order to cooperate with the installation and fixation of the disposable locking strip 4, a locking strip installation groove 2012 is provided on the connecting rod 201, and a sleeve protrusion 2013 is fixed to the end of the connecting rod 201 away from the sleeve protrusion 2013. The end of the locking strip installation groove 2012 away from the sleeve protrusion 2013 is also provided with a locking strip fixing hole 2011 that passes through the connecting rod 201. The locking strip installation groove 2012 is used to accommodate the rack portion 401, so that the rack portion 401 remains straight. In this state, the sleeve protrusion 2013 can be sleeved and matched with the installation sleeve part 403, and the locking strip fixing hole 2011 can be fixedly matched with the fixing protrusion 402. After the installation sleeve part 403 is sleeved on the sleeve protrusion 2013, the end of the rack part 401 can be fixed, and then the fixing protrusion 402 at the other end of the rack part 401 is pressed into the locking strip fixing hole 2011 to complete the fixation of the other end of the rack part 401, thereby fixing the entire disposable locking strip 4 on the connecting rod 201.

[0029] In this embodiment, the locker includes a locker body 5, a rolling gear column 6 and an elastic sheet 7. A groove is provided on the locker body 5, and the rolling gear column 6 and the elastic sheet 7 are provided in the groove. The elastic sheet 7 is fixed to the locker body 5, and the rolling gear column 6 rolls in the groove. The locker body 5 is provided with a toothed inclined surface 501 at the groove. The toothed inclined surface 501 is provided with the same convex tooth features as the rack portion 401. One end of the elastic sheet 7 contacts the rolling gear column 6 and drives the rolling gear column 6 close to the toothed inclined surface 501. Figure 6 When the two retraction rods 1 are opened, the locking device body 5 moves to the right, and the locking device body 5 drives the elastic sheet 7, and the elastic sheet 7 pushes the rolling gear column 6 to roll on the rack portion 401. In this state, the rolling gear column 6 can roll along the rack portion 401 without hindrance. However, if the two retraction rods 1 are pushed closer to each other, that is, the locking device body 5 moves to the left, the toothed inclined surface 501 pushes the rolling gear column 6, but the toothed inclined surface 501 cannot push the rolling gear column 6 to roll all the time, but instead exerts pressure on the rolling gear column 6, and finally prohibits the movement of the locking device body 5, and the locking device body 5 is fixed to the sliding sleeve 202, thereby achieving the fixation of the sliding sleeve 202 and the connecting rod 201.

[0030] Advantageously, in order to facilitate the installation and disassembly of the locker, the sliding sleeve 202 is provided with the locker fixing hole 2021, and all the mounting round tables are fixed on the locker body 5. The locker is installed and fixed in the sliding sleeve 202 through the cooperation between the mounting round tables and the locker fixing holes 2021.

[0031] When performing a thoracotomy, first install the disposable locking strip 4 and the locking device on the connecting rod 201 and the sliding sleeve 202. When expanding the sternum, hold the position of the two expansion pieces 3 with both hands, and then use both hands to drive the two retraction rods 1 to open. In this way, when opening the sternum, medical staff can feel the opening force of the sternum more clearly. Compared with the traditional retractor, this way of opening the sternum can feel the opening force of the sternum more clearly, thereby effectively avoiding tissue traction injury caused by excessive force when expanding the sternum, reducing surgical trauma, and releasing the hands after the sternum is opened to the required width. The two retraction rods 1 are automatically kept fixed under the action of the disposable locking strip 4 and the locking device, and the operation is simple and easy.

[0032] In this embodiment, in order to facilitate the replacement of different types of expansion pieces 3 and post-operative cleaning, the cross-sectional shape of the expansion piece 3 in the length direction of the retraction rod 1 is S-shaped, and the retraction rod 1 is provided with the positioning slot 101 at the position where the expansion piece 3 is fixed, and the expansion piece 3 is also provided with a hook 301. When the expansion piece 3 is installed on the retraction rod 1, the positioning slot 101 on the retraction rod 1 is aligned with the U-shaped groove position at the hook 301, and the retraction rod 1 is inserted into the U-shaped groove to complete the installation and fixation of the expansion piece 3 on the retraction rod 1. The installation process is very simple. If you want to remove the expansion piece 3 from the retraction rod 1, you only need to pry the hook 301 to easily remove the expansion piece 3 from the retraction rod 1.

[0033] In this embodiment, the entire retractor has no complicated structure except for the disposable fixing parts, which makes it very easy to clean and disinfect the device after surgery, and can effectively avoid the risk of bacterial contamination during surgery.

[0034] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sternal retractor, comprising two mutually parallel retractor rods (1), a connecting portion (2) connecting the two retractor rods (1), and a spreading piece (3) fixed to one end of the retractor rods (1) away from the connecting portion (2), characterized in that: The spreading piece (3) and the retraction rod (1) are detachably fixed, and the connecting portion (2) comprises a connecting rod (201) and a sliding sleeve (202) slidably arranged on the connecting rod (201), one end of the connecting rod (201) is fixed to one end of one of the retraction rods (1), and the sliding sleeve (202) is fixed to the same end of the other retraction rod (1); A disposable fixing piece is also provided between the connecting rod (201) and the sliding sleeve (202). When the two retraction rods (1) move toward each other, the disposable fixing piece can automatically lock and fix the connecting rod (201) and the sliding sleeve (202). The disposable fixing piece includes a disposable locking strip (4) fixed to the connecting rod (201) and a locking device fixed to the sliding sleeve (202); The disposable locking strip (4) comprises a rack portion (401), a fixing protrusion (402) and a mounting sleeve portion (403), wherein the fixing protrusion (402) and the mounting sleeve portion (403) are respectively fixedly arranged at different ends of the rack portion (401), and a side surface of the rack portion (401) is evenly provided with protruding teeth; The connecting rod (201) is provided with a locking strip installation groove (2012), and the end of the connecting rod (201) away from the end fixed to the retraction rod (1) is also fixed with a sleeve protrusion (2013), and the end of the locking strip installation groove (2012) away from the sleeve protrusion (213) is also provided with a locking strip fixing hole (2011) passing through the connecting rod (201), the locking strip installation groove (2012) is used to accommodate the rack part (401), the sleeve protrusion (2013) can be sleeved and matched with the installation sleeve part (403), and the locking strip fixing hole (2011) can be fixedly matched with the fixing protrusion (402); The locker comprises a locker body (5), a rolling tooth column (6) and an elastic sheet (7); a groove is provided on the locker body (5); the rolling tooth column (6) and the elastic sheet (7) are provided in the groove; the elastic sheet (7) is fixed to the locker body (5); the rolling tooth column (6) rolls in the groove; a toothed inclined surface (501) is provided on the locker body (5) at the groove; one end of the elastic sheet (7) contacts the rolling tooth column (6) and drives the rolling tooth column (6) close to the toothed inclined surface (501).

2. The sternal retractor according to claim 1, characterized in that: The toothed inclined surface (501) is provided with the same convex tooth features as the rack portion (401).

3. The sternal retractor according to claim 1, characterized in that: The sliding sleeve (202) is provided with a locking device fixing hole (2021), and all mounting round tables are fixed on the locking device body (5), and the locking device is installed and fixed in the sliding sleeve (202) through the cooperation between the mounting round tables and the locking device fixing hole (2021).

4. The sternal retractor according to claim 1, characterized in that: The cross-section of the spreading piece (3) in the length direction of the retraction rod (1) is S-shaped, a positioning slot (101) is provided at the position where the retraction rod (1) fixes the spreading piece (3), and a hook (301) is also provided on the spreading piece (3).

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