Sternum retractor

Abstract

The invention relates to the technical field of medical apparatuses and instruments, and discloses a sternum retractor which comprises two parallel retractor rods, a connecting part connecting the two retractor rods and a distraction piece fixed to the ends, away from the connecting part, of the retractor rods. The connecting part comprises a connecting rod and a sliding sleeve arranged on the connecting rod in a sliding mode; a disposable fixing piece is further arranged between the connecting rod and the sliding sleeve, a connecting structure of a traditional traction rod is redesigned, and the two traction rods are connected through the connecting part composed of the connecting rod, the sliding sleeve and the disposable fixing piece. A complex fixing structure is integrated on the disposable fixing piece which consumes few materials and is easy to replace, the disposable fixing piece can be detached after an operation is completed, the other parts of the retractor except the disposable fixing piece are not provided with complex structures, and cleaning and disinfection treatment is very easy.

Description

Technical Field

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

[0002] In thoracotomy, most thoracotomy is performed through a median sternotomy incision. In short, the sternum is cut vertically in half. After the cut, the cut sternum usually needs to be fixed for the convenience of surgery. Therefore, the retractor for sternal expansion and fixation was born. The sternal retractor is a medical device used in thoracic surgery. Its main function is to help doctors expand the sternum during surgery, thereby providing a better surgical field of view and operating space.

[0003] The current sternal retractor mainly includes a traction part composed of two traction rods parallel to each other and a connecting part connecting the two traction rods. The connecting part is similar to a gear rack structure. One of the two traction rods is fixed to one end of the "rack", and the other traction rod is set 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 traction rods are changed from a state of sliding against each other 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 toothed structure also has the risk of scratching surrounding tissues. The structure that is more difficult to clean is the gear part set in the sliding sleeve, which causes great trouble to the cleaning of 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 that the existing retractor is difficult to clean after surgery.

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

[0007] In a 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 respectively fixed at different ends of the rack portion, and one side of the rack portion is evenly provided with convex teeth.

[0008] In a possible design, a locking strip installation groove is provided on the connecting rod, and a socket protrusion is fixedly provided on the end of the connecting rod away from the retraction rod. The end of the locking strip installation groove away from the socket protrusion is also provided with a locking strip fixing hole that passes through the connecting rod. The locking strip installation 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 fixedly matched with the fixing protrusion.

[0009] In a possible design, the locker includes a locker body, a rolling gear column and an elastic sheet portion, the locker body is provided with a groove, the rolling gear column and the elastic sheet portion are provided in the groove, the elastic sheet portion is fixed to the locker body, the rolling gear column rolls in the groove, the locker body is provided with a toothed inclined surface at the groove, 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-sectional shape 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 barb.

[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, adopts a connection part composed of a connecting rod, a sliding sleeve and a disposable fixing part to connect the two retractor rods, and integrates the complex fixing structure on 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 condition 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 truly 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 diagram of the structure 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 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 groove, 2013-sleeve protrusion, 202-sliding sleeve, 2021-locking device fixing hole, 3-opening sheet, 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 embodiments and drawings. The exemplary embodiments of the present invention and their description 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 on the retraction rod 1 at one end away from the connecting portion 2, the spreading piece 3 and the retraction rod 1 are detachably fixed, the connecting portion 2 includes 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;

[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 application, after the sternum is expanded by the two retraction rods 1, the disposable fixing part can prevent the two retraction rods 1 from approaching 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 locking device 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 convex teeth to increase the friction of the surface. Its specific structure can refer to the toothed 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 fixedly provided at one end of the connecting rod 201 away from the sleeve protrusion 2013, and a locking strip fixing hole 2011 that passes through the connecting rod 201 is also provided at one end of the locking strip installation groove 2012 away from the sleeve protrusion 2013, and the locking strip installation groove 2012 is used to accommodate the rack portion 401, so that the rack portion 401 remains straight 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 tooth column 6 and an elastic sheet 7. A groove is provided on the locker body 5, and 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, and the rolling tooth column 6 rolls in the groove. A toothed inclined surface 501 is provided on the locker body 5 at the groove, and 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 tooth column 6 and drives the rolling tooth column 6 to approach 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 at this time, 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 realizing 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 plates 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 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 slot position at the hook 301, and the retraction rod 1 is inserted into the U-shaped slot 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 convenient 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 retractor rods (1) parallel to each other, 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, the connecting part (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 part 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 part can automatically lock and fix the connecting rod (201) and the sliding sleeve (202). The disposable fixing part includes a disposable locking strip (4) fixed to the connecting rod (201) and a locking device fixed to the sliding sleeve (202).

2. A sternal retractor according to claim 1, characterized in that: 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 convex teeth.

3. A sternal retractor according to claim 2, characterized in that: The connecting rod (201) is provided with a locking strip installation groove (2012), and the end of the connecting rod (201) away from the retraction rod (1) is also fixedly provided with a sleeve protrusion (2013), and 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) penetrating the connecting rod (201), and the locking strip installation groove (2012) is used to accommodate the rack part (401), and 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).

4. The sternal retractor according to claim 1, characterized in that: The locking device comprises a locking device body (5), a rolling tooth column (6) and an elastic sheet (7); a groove is provided on the locking device 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 locking device body (5), the rolling tooth column (6) rolls in the groove, a toothed inclined surface (501) is provided on the locking device 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) to approach the toothed inclined surface (501).

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

6. The sternal retractor according to claim 4, 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). 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 holes (2021).

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

Images