Surgical retractors for cardiac surgery

Abstract

The present invention relates to a surgical retractor for cardiac surgery, comprising: a hollow tubular first base having a first longitudinal axis, at least one first sheet having a first end, a second end, and a first sheet longitudinal axis being laterally arranged on the first base with its first end thereon; and a second base having a second longitudinal axis, at least one second sheet having a first end, a second end, and a second sheet longitudinal axis being laterally arranged on the second base with its first end thereon, wherein a first delivery rod having a first delivery rod longitudinal axis is arranged in the first base in a manner rotatably supported about the first delivery rod longitudinal axis, wherein at least one second sheet passes through the first base in a through opening transverse to the first base longitudinal axis, and wherein at least one second sheet has a plurality of recesses arranged spaced apart from each other along the second sheet longitudinal axis, and the first delivery rod has at least one protrusion interacting with the recesses.

Description

Technical Field

[0001] This invention relates to a surgical retractor for use in cardiac surgery. Background Technology

[0002] EP 2 124 757 B1 discloses an atrial retractor for use in cardiac surgery, wherein a retractor blade is disposed on the distal end of a handle, and wherein a pivotable flap is disposed on the retractor blade, the flap being pivotable to expand the support surface. Appropriate space is required for pivoting the flap. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide a surgical retractor for cardiac surgery that can be easily enlarged in terms of its retained area after being introduced through an inlet.

[0004] The surgical retractor for cardiac surgery according to the invention comprises: a hollow tubular first base having a first longitudinal axis, at least one first sheet having a first end, a second end, and a first sheet longitudinal axis being laterally arranged on the first base with its first end thereon; and a second base having a second longitudinal axis, at least one second sheet having a first end, a second end, and a second sheet longitudinal axis being laterally arranged on the second base with its first end thereon, wherein a first delivery rod having a first delivery rod longitudinal axis is arranged in the first base in a manner rotatably supported about the first delivery rod longitudinal axis, wherein at least one second sheet passes through the first base in a through opening transverse to the first base longitudinal axis, and wherein at least one second sheet has a plurality of recesses arranged spaced apart from each other along the second sheet longitudinal axis, and the first delivery rod has at least one protrusion interacting with the recesses.

[0005] This design achieves a lateral widening of the support surface of the retractor spanned by the first and second plates, and in particular, eliminates the need to allocate space for pivoting movements that require additional space. As the conveyor rod rotates about its longitudinal axis, the second plate moves through the through opening, particularly laterally to the longitudinal axis of the first substrate, due to the interaction between the protrusions arranged on the conveyor rod and the recesses of at least one second plate. If, for example, the second substrate is adjacent to the first substrate in a first position, at least one second plate can be laterally displaced by the rotation of the conveyor rod, where the distance between the second and first substrates increases. Here, the support surface of the retractor is also increased.

[0006] With regard to the term "sheet" as used below, unless otherwise expressly stated, it shall include the first sheet and the second sheet, and if present, a third sheet or more sheets. The same applies to the use of the terms "substrate" and "transport rod," unless otherwise expressly stated.

[0007] To achieve improved cleanliness, the recesses in at least one second sheet can be configured as continuous recesses. Alternatively, corresponding recesses can be arranged on at least one first sheet.

[0008] Preferably, the first conveying rod has multiple protrusions, which are particularly configured in the form of gears. This design allows for a reliable and easy-to-clean conveying mechanism with a simple structure.

[0009] An advantageous improvement of the invention specifies that the first conveying rod has a non-circular actuating section, preferably an actuating section with a hexagonal cross-section, wherein, preferably, the actuating section protrudes from the base body at one end. This actuating section allows the conveying rod to be rotated in a simple manner using a suitable tool, such as a bolt wrench.

[0010] According to a preferred embodiment of the invention, the first substrate has three first sheets arranged at intervals along the longitudinal axis of the first substrate. Here, the first sheets can be interconnected at their second ends by means of transverse webs. This frame-like design achieves maximum stability for the retractor.

[0011] Preferably, the second substrate has two second sheets arranged spaced apart along the longitudinal axis of the second substrate. These second sheets are preferably each joined into the gap between every two first sheets. This design allows for high stability in a structure that is as compact as possible.

[0012] Advantageously, during the conveying motion, the side edge of at least one second sheet is guided in a sliding manner along the side edge of at least one first sheet, preferably in a tenon-and-mortise manner. This also improves stability during the conveying motion.

[0013] A preferred embodiment of the invention specifies that the second base has a length that is less than the length of the first base, preferably at least 10% less than the length of the first base. This allows the retractor to be better adapted to the anatomical conditions of the heart.

[0014] According to a particularly preferred improvement of the invention, the third base is provided with a third base longitudinal axis, and at least one third sheet having a first end, a second end, and a third sheet longitudinal axis is laterally arranged on the third base with its first end facing the third base. The second base is configured as a hollow tube, and a second conveying rod having a second conveying rod longitudinal axis is arranged in the second base in a manner rotatably supported about the second conveying rod longitudinal axis. At least one third sheet passes through the second base in a through opening transverse to the second base longitudinal axis, and at least one third sheet has a plurality of recesses arranged spaced apart from each other along the third sheet longitudinal axis, and the second conveying rod has at least one protrusion interacting with the recesses. This third base achieves a further widening of the support surface of the retractor. However, here, the retractor can be pushed closed to be introduced through the inlet such that its width substantially corresponds to the length of the first sheet plus the width of the base. Therefore, the width in the fully opened state can become approximately three times that in the fully closed state.

[0015] A fourth matrix and additional matrices, if necessary, can also be set up in a similar manner.

[0016] Preferably, the third substrate has two third sheets arranged spaced apart along the longitudinal axis of the third substrate so as to span as much of the support surface as possible.

[0017] According to an advantageous design of the invention, the width of a sheet approximately corresponds to the length of the first substrate divided by the number of sheets in the puller. In other words, the width of a sheet is preferably chosen to be as large as possible in order to achieve the maximum possible stability and the maximum possible support surface.

[0018] A particularly preferred design of the invention specifies that the sheet is curved along its longitudinal axis. This design allows the retractor to be well adapted to anatomical conditions.

[0019] According to an advantageous embodiment of the invention, the through opening has a curved support surface for the sheet, thereby improving the stability of the puller and improving the guidance of the sheet during transport.

[0020] Preferably, the sheet has a stop element at its second end that is preferably elastically configured. The stop element prevents the sheet from unintentionally spinning out of the through opening in the corresponding substrate. If the stop element is elastically configured, this can be achieved by intentionally applying a greater force, for example, to remove the retractor for cleaning purposes or when replacing the sheet.

[0021] Advantageously, the hollow tubular substrate has at least one flushing opening, preferably multiple flushing openings, in order to achieve improved cleanability.

[0022] Particularly preferably, a storage element for accommodating and / or manipulating a handle is arranged on the first base. With the aid of the holding and / or manipulating handle, the retractor can be inserted through the inlet and positioned in the desired location and / or orientation during surgical procedures.

[0023] The surgical retractor according to the invention is particularly useful in cardiac surgery. Attached Figure Description

[0024] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings:

[0025] Figure 1 A perspective view of an embodiment of a surgical retractor for cardiac surgery according to the present invention is shown;

[0026] Figure 2 It shows that according to Figure 1 Another perspective view of the retractor;

[0027] Figure 3 It shows that according to Figure 1 A top view of the retractor;

[0028] Figure 4 shows the following along Figure 3 Cross section of line AA;

[0029] Figure 5 shows an enlarged cross-section of Figure 4;

[0030] Figure 6 It shows that according to Figure 1 A perspective view of the two conveyor rods of the puller; and

[0031] Figure 7 It shows that according to Figure 1 The retractor is equipped with a holding and / or operating handle. Detailed Implementation

[0032] Figures 1 to 7 Different views of an embodiment of a surgical retractor 100 for cardiac surgery according to the present invention are shown. The same reference numerals denote the same or functionally identical parts, wherein, for better overview, not all reference numerals are given in all figures.

[0033] The surgical retractor 10 for cardiac surgery has a hollow tubular first base 20 having a first longitudinal axis AG1. The first base 20 may consist of two half-shells 20a, 20b, which simplifies manufacturing and installation. At least one first sheet 30, or in this embodiment, three sheets 30, having a first end 31, a second end 32, and a first sheet longitudinal axis AL1, is laterally arranged on the first base 20 with its first end 31. This lateral arrangement results in the first sheet longitudinal axis AL1 being arranged substantially transversely to, for example, substantially perpendicular to, the first base longitudinal axis AG1. The second end 32 of the first sheet 30 may be connected by means of a transverse web 35 to improve the stability of the retractor 10.

[0034] The retractor 10 also has a second base 40 having a second base longitudinal axis AG2, and at least one second sheet 50, each having a first end 51, a second end 52, and a second sheet longitudinal axis AL2. In this embodiment, two second sheets 50 are laterally arranged on the second base 40 with their first ends 51. The lateral arrangement results in the second sheet longitudinal axis AL2 being arranged substantially transversely to, for example substantially perpendicularly to, the second base longitudinal axis AG2.

[0035] The second substrate 40 has a length 1G2, which is less than the length 1G1 of the first substrate 20, preferably at least 10% less than the length 1G1 of the first substrate (20) (see [reference]). Figure 7 ).

[0036] A first conveying rod 25, having a first conveying rod longitudinal axis AT1, is arranged in a first base 20 in a manner rotatably supported about the first conveying rod longitudinal axis AT1. The first base 20 may consist of two half-shells 20a and 20b, which simplifies manufacturing and installation, especially the embedding of the first conveying rod 25 into the first base 20.

[0037] The first substrate 20 has a through opening 24 that extends substantially transversely to the longitudinal axis AG1 of the first substrate. At least one second sheet 50 is arranged in the through opening 24. In particular, at least one second sheet 50 passes through the first substrate 20 in the through opening 24 transversely to the longitudinal axis AG1 of the first substrate (see especially FIG. 5). If two second sheets 50 are present as in this embodiment, the first substrate 20 preferably has two through openings 24, and one second sheet 50 is arranged in each of these through openings 24.

[0038] At least one second sheet 50 has a plurality of recesses 53 arranged spaced apart from each other along the longitudinal axis AL2 of the second sheet, while the first conveying rod 25 has at least one protrusion 26 that interacts with the recesses 53. The recesses 53 are configured not only as depressions but also as continuous recesses 53. Preferably, the first conveying rod 25 has a plurality of protrusions 26, which are configured, for example, in the form of gears (see Figure 5 and...). Figure 6 If there are two second sheets 50, the first conveying rod 25 has at least one protrusion 26 for each of the second sheets 50, preferably a plurality of protrusions 26 in the form of gears (see...). Figure 6 ).

[0039] The first conveying rod 25 may have a non-circular actuating section 27, which in this embodiment is configured as an actuating section 27 having a hexagonal cross-section. The actuating section 27 may protrude from the base 20 on the end side 21 of the first base 20 and is therefore easily accessible (see especially...). Figure 1 and Figure 2 ).

[0040] If the first conveying rod 25 rotates about its first conveying rod longitudinal axis AT1, for example by applying a bolt wrench-like tool to the actuating section 27 and prying the tool accordingly, the second sheet 50 can be further pulled into or pushed out of the through opening 24 by engaging the protrusion 26 into the recess 53, depending on the direction of rotation. The second sheet 50 can be pulled in so far that the second base 40 is adjacent to the first base 20. To prevent the second sheet 50 from being unintentionally screwed out or pushed out of the through opening 24 of the first base 20, a stop element 54 can be arranged on the second end 52 of the second sheet 50. If the stop element 54 is configured in an elastic manner, for example as an elastic spring lip as in this embodiment, this can be achieved by intentionally applying a greater force.

[0041] During the conveying motion, i.e. during the pulling in or pushing out of the second sheet, at least one side edge 50a of the second sheet 50 may be guided in a sliding manner along at least one side edge 30a of the first sheet 30, for example, in a tenon-and-mortise manner.

[0042] At least one first sheet 30 may also have a plurality of recesses 33 arranged at intervals along the longitudinal axis AL1 of the first sheet. The recesses 33 are configured not only as recesses, but also as continuous recesses 53.

[0043] The puller 10 may further include a third base B60 having a third base longitudinal axis AG3, and at least one third sheet 70, each having a first end 71, a second end 72, and a third sheet longitudinal axis AL3. In this embodiment, two third sheets 70 are laterally arranged on the third base 60 with their first ends 71. The lateral arrangement results in the third sheet longitudinal axis AL3 being arranged substantially transversely to, for example substantially perpendicularly to, the third base longitudinal axis AG3.

[0044] The third substrate 60 may have a length 1G3, which roughly corresponds to the length 1G2 of the second substrate 40 (see [reference]). Figure 7 ).

[0045] The second conveying rod 45, having a second conveying rod longitudinal axis AT2, is arranged in the second base 40 in a manner rotatably supported about the second conveying rod longitudinal axis AT2. The second base 40 may also consist of two half-shells, like the first base 20.

[0046] The second substrate 40 may have a through opening 44, which extends substantially transversely to the longitudinal axis AG2 of the second substrate. At least one third sheet 70 is arranged in the through opening 44. In particular, at least one third sheet 70 passes through the second substrate 40 in the through opening 44 transversely to the longitudinal axis AG2 of the second substrate. If two third sheets 70 are present as in this embodiment, the second substrate 40 preferably has two through openings 44, and one third sheet 70 is arranged in each of these through openings 44.

[0047] At least one third sheet 70 has a plurality of recesses 73 arranged spaced apart from each other along the longitudinal axis AL3 of the third sheet, while the second conveying rod 45 has at least one protrusion 46 that interacts with the recesses 73. In particular, the second conveying rod 45 has a plurality of protrusions 46, which are configured, for example, in the form of gears (see...). Figure 6 If there are two third sheets 70, the second conveying rod 45 has at least one protrusion 46 for each of the third sheets 70, preferably multiple protrusions 46 in the form of gears (see...). Figure 6 ).

[0048] The second conveying rod 45 may have a non-circular actuating section 47, which in this embodiment is configured as an actuating section 47 having a hexagonal cross-section. The actuating section 47 may protrude from the base 40 on the end side 41 of the second base 40 and is therefore easily accessible (see especially...). Figure 1 and Figure 2 ).

[0049] If the second conveyor rod 45 rotates about its second conveyor rod longitudinal axis AT2, then, as described with reference to the first conveyor rod 25, depending on the direction of rotation, the third sheet 70 is further pulled into or pushed out of the through opening 44 by engaging the protrusion 46 into the recess 73. The third sheet 70 can be pulled in so far that the third substrate 60 abuts against the second substrate 40. To prevent the second sheet 70 from being unintentionally twisted out or pushed out of the through opening 44 of the second substrate 40, a stop element 74 can be arranged on the second end 72 of the third sheet 50 (see...). Figure 2 If the stop element 74 is configured in an elastic manner, for example as an elastic spring lip as in this embodiment, then this can be achieved by intentionally applying a greater force to achieve intentional rotation out.

[0050] The width of a sheet 30, 50, or 70 preferably corresponds approximately to the length lG1 of the first substrate 20 divided by the number of all sheets 30, 50, or 70 of the puller 10. Thus, the width of the sheets 30, 50, or 70 can be chosen to be as large as possible.

[0051] If the second substrate 40 is arranged adjacent to the first substrate 20 and the third substrate 60 is arranged adjacent to the second substrate 40, then the second sheet 50 and the third sheet 70 protrude into the gap between the first sheets 30. Here, particularly preferably, each of the two second sheets 50 is adjacent to the outermost first sheet of the three first sheets 30, while the two third sheets 70 are adjacent to the innermost first sheets of the three first sheets 30 and each of the two second sheets is adjacent to one of the two second sheets on its outer edge.

[0052] The sheets 30, 50, and 70 can be configured to be curved along their longitudinal axes AL1, AL2, and AL3 (see especially Figure 4). In this case, the through openings 24 and 44 can have curved support surfaces 24a for the respective sheets 50 and 70 (see especially Figure 5).

[0053] The hollow tubular substrates 20 and 40 may have at least one flushing opening 22 or 42, preferably multiple flushing openings 22 or 42.

[0054] The storage element 80 for accommodating and / or manipulating the handle 90 can be arranged on the retractor 10, particularly on the first base 20 (see especially). Figure 7 If the holding and / or manipulating handle 90 is inserted into the receiving element 80, the retractor 10 can be inserted into the surgical area through the inlet and positioned in the desired location and orientation.

[0055] Explanation of reference numerals in the attached figures:

[0056] 10 Retractor

[0057] 20 First matrix

[0058] 20a Half-shell

[0059] 20b Half Shell

[0060] 21 end side

[0061] 22 Flushing opening

[0062] 24 Through opening

[0063] 25 First conveyor rod

[0064] 26. Protrusion

[0065] 27 Actuation Section

[0066] 30 First thin slice

[0067] 30a Side edge

[0068] 31 First end

[0069] 32 Second end

[0070] 33 recess

[0071] 35 Transverse web

[0072] 40 Second matrix

[0073] 41 End side

[0074] 42 Flushing opening

[0075] 44 Through opening

[0076] 45 Second conveyor rod

[0077] 46. ​​Protrusion

[0078] 47 Actuating Section

[0079] 50 Second thin slice

[0080] 50a Side Edge

[0081] 51 First end

[0082] 52 Second end

[0083] 53 recess

[0084] 54 Stopping elements

[0085] 60 Third matrix

[0086] 70 Third thin slice

[0087] 71 First end

[0088] 72 Second end

[0089] 73 recess

[0090] 74 Stopping elements

[0091] 80 storage components

[0092] 90. Hold and / or operate the handle.

[0093] 1G1 Length

[0094] 1G2 Length

[0095] 1G3 Length

[0096] AG1 First matrix longitudinal axis

[0097] AG2 Second matrix longitudinal axis

[0098] AG3 Third matrix longitudinal axis

[0099] AL1 first thin sheet longitudinal axis

[0100] AL2 second thin sheet longitudinal axis

[0101] AL3 third thin sheet longitudinal axis

[0102] AT1 First conveyor rod longitudinal axis

[0103] AT2 Second Conveyor Rod Longitudinal Axis

Claims

1. A surgical retractor (10) for cardiac surgery, comprising: a hollow tubular first base (20) having a first base longitudinal axis (AG1), at least one first sheet (30) having a first end (31), a second end (32) and a first sheet longitudinal axis (AL1) being laterally arranged on the first base (20) at its first end (31); and a second base (40) having a second base longitudinal axis (AG2), at least one second sheet (50) having a first end (51), a second end (52) and a second sheet longitudinal axis (AL2) being laterally arranged on the second base (40) at its first end (51), wherein, A first conveying rod (25) having a first conveying rod longitudinal axis (AT1) is arranged in the first base (20) in a manner rotatably supported about the first conveying rod longitudinal axis (AT1), wherein at least one second sheet (50) passes through the first base (20) in a through opening (24) transverse to the first base longitudinal axis (AG1), and wherein the at least one second sheet (50) has a plurality of recesses (53) arranged spaced apart from each other along the second sheet longitudinal axis (AL2), and the first conveying rod (25) has at least one protrusion (26) interacting with the recesses (53).

2. The surgical retractor according to claim 1, characterized in that, The first conveying rod (25) has multiple protrusions (26).

3. The surgical retractor according to claim 2, characterized in that, The plurality of protrusions (26) are configured in the form of gears.

4. The surgical retractor according to any one of claims 1-3, characterized in that, The first conveying rod (25) has a non-circular actuation section (27).

5. The surgical retractor according to claim 4, characterized in that, The actuating section has a hexagonal cross-section.

6. The surgical retractor according to claim 4, characterized in that, The actuating section (27) protrudes from the first base (20) on the end side (21) of the first base (20).

7. The surgical retractor according to any one of claims 1-3, characterized in that, The first substrate (20) has three first sheets (30) arranged at intervals along the longitudinal axis (AG1) of the first substrate.

8. The surgical retractor according to any one of claims 1-3, characterized in that, The second substrate (40) has two second sheets (50) arranged spaced apart along the longitudinal axis (AG2) of the second substrate.

9. The surgical retractor according to any one of claims 1-3, characterized in that, During the conveying motion, the side edge (50a) of the at least one second sheet (50) is guided in a sliding manner along the side edge (30a) of the at least one first sheet (30).

10. The surgical retractor according to claim 9, characterized in that, The side edge (50a) of the at least one second sheet (50) is guided along the side edge (30a) of the at least one first sheet (30) in a tenon-and-mortise manner.

11. The surgical retractor according to any one of claims 1-3, characterized in that, The second substrate (40) has a length (1G2) that is less than the length (1G1) of the first substrate (20).

12. The surgical retractor according to claim 11, characterized in that, The length (1G2) of the second substrate is at least 10% smaller than the length (1G1) of the first substrate (20).

13. The surgical retractor according to any one of claims 1-3, characterized in that, The third substrate (60) is provided with a third substrate longitudinal axis (AG3), and at least one third sheet (70) having a first end (71), a second end (72) and a third sheet longitudinal axis (AL3) is laterally arranged on the third substrate (60) with its first end (71). The second substrate (40) is configured as a hollow tube, and a second conveying rod (45) having a second conveying rod longitudinal axis (AT2) is arranged in the second substrate (40) in a manner rotatably supported about the second conveying rod longitudinal axis (AT2). The at least one third sheet (70) passes through the second substrate (40) in a through opening (44) transverse to the second substrate longitudinal axis (AG2). The at least one third sheet (70) has a plurality of recesses (73) arranged spaced apart from each other along the third sheet longitudinal axis (AL3), and the second conveying rod (45) has at least one protrusion (46) that interacts with the recesses (73).

14. The surgical retractor according to claim 13, characterized in that, The third substrate (60) has two third sheets (70) arranged spaced apart along the longitudinal axis (AG3) of the third substrate.

15. The surgical retractor according to any one of claims 1-3, characterized in that, The width of a sheet (30, 50, 70) roughly corresponds to the length (1G1) of the first substrate (20) divided by the number of all the sheets (30, 50, 70) of the puller (10).

16. The surgical retractor according to any one of claims 1-3, characterized in that, The sheets (30, 50, 70) are curved along their longitudinal axes (AL1, AL2, AL3).

17. The surgical retractor according to any one of claims 1-3, characterized in that, The through opening (24, 44) has a curved support surface (24a) for the sheet (50, 70).

18. The surgical retractor according to any one of claims 1-3, characterized in that, The sheet (50, 70) has a stop element (54, 74) at its second end (52, 72).

19. The surgical retractor according to claim 18, characterized in that, The stop elements (54, 74) are elastically configured.

20. The surgical retractor according to any one of claims 1-3, characterized in that, The hollow tubular first substrate (20) and the hollow tubular second substrate (40) have at least one flushing opening (22, 42).

21. The surgical retractor according to claim 20, characterized in that, The flushing opening is a plurality of flushing openings.

22. The surgical retractor according to any one of claims 1-3, characterized in that, A storage element (80) for storing, holding and / or operating the handle (90) is arranged on the first base (20).

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