Tissue retractor

Abstract

The invention relates to the technical field of medical apparatus and instruments, and discloses a tissue retractor which comprises a handle part, a first guide rod and a second guide rod, the first traction structure comprises a first traction rod and a first traction claw, a first sliding sleeve is arranged at one end of the first traction rod, the second traction structure comprises a connecting rod, a second guide rod, a second traction rod and a second traction claw, and a first sliding groove extending in the second direction is formed in the top of the first traction rod; the connecting rod is provided with a second sliding groove which extends in the first direction and allows the sliding table to stretch into, the end of the second traction rod is provided with a second sliding sleeve which is connected with the second guide rod in a sleeved mode and is in sliding fit with the second guide rod, the second traction claw is connected to the other end of the second traction rod, and the two second traction structures are arranged on the first traction structure in parallel. The retraction depth of the first retraction claw is the same as or different from that of the second retraction claw, the first retraction claw is used for carrying out traction action in the first direction, and the second retraction claw is used for carrying out traction action in the first direction or the second direction.

Description

Technical Field

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

[0002] The femoral artery, axillary artery, carotid artery, and subclavian artery are commonly used access routes for cardiovascular surgery. Clear exposure of the above arteries through surgical dissection can ensure the smooth progress of subsequent cardiovascular surgery.

[0003] At present, the vascular anatomy retractor commonly used in clinical practice at home and abroad is the mastoid retractor, including the large mastoid retractor and the small mastoid retractor. The mastoid retractor mainly consists of two parts. One part is the mastoid head. The skin, subcutaneous tissue, muscles, etc. corresponding to the blood vessels to be dissected are retracted through two rakes about 4*2cm long and deep on the left and right. The second part is the retractor handle. By pinching the handle, the two longitudinal rakes on the mastoid head can open a space of 0-6cm, thereby exposing the blood vessels to be dissected. It is generally used for thin patients with clear subcutaneous tissue structure. The large mastoid retractor also consists of two parts, the mastoid head and the retractor handle. The two rakes on the left and right of the large mastoid head are about 8*4cm long and deep, and the opening and closing space of the retractor handle is 0-8cm. It is generally used for obese patients with loose subcutaneous tissue and poor exposure of blood vessels by the small mastoid. However, the above two mastoid retractors still face two problems: 1. As the lateral retraction space of the mastoid head increases, the longitudinal exposure space of the required blood vessels becomes smaller. Although the tissue above the required anatomical blood vessels can be retracted laterally, the longitudinal field of view of the required anatomical blood vessels is lost; 2. Once a patient with abdominal fat hypertrophy, a body weight of more than 90 kg, or a depth of tissue above the required anatomical blood vessels exceeding 8 cm is encountered, the rake of the mastoid head with a fixed length and depth will be difficult to clearly display the deep blood vessels that need to be dissected. In addition, when it is necessary to retract tissue with a certain depth, multiple retractors need to be superimposed, and the coordination positions of each retractor are inconsistent, making it impossible to perform the operation efficiently. Summary of the invention

[0004] In view of this, the present invention provides a tissue retractor to solve the problems of the conventional tissue retractor, such as unclear surgical field, inability to adapt to the retraction needs of patients of different body shapes, and inability to adapt to the needs of retraction surgeries of different depths.

[0005] The present invention provides a tissue retractor, comprising:

[0006] A handle portion having a first guide rod extending along a first direction;

[0007] A first pulling structure comprises a first pulling rod and a first pulling claw, one end of the first pulling rod has a first sliding sleeve, the first sliding sleeve is sleeved and slidably matched with the first guide rod, the first pulling rod extends along a second direction, the second direction is coplanar and perpendicular to the first direction, the first pulling claw is arranged at the bottom of the first pulling rod, the first pulling claw extends along a third direction, the third direction is perpendicular to the plane where the first direction and the second direction are located, and two groups of the first pulling structures are arranged on the first guide rod;

[0008] The second traction structure comprises a connecting rod, a second guide rod, a second traction rod and a second traction claw, a first slide groove extending along a second direction is arranged on the top of the first traction rod, a slide table is arranged in the first slide groove, the connecting rod has a second slide groove extending along the first direction and allowing the slide table to extend into, the second guide rod is arranged in parallel with the connecting rod and the two end edges are connected to the connecting rod, a second sliding sleeve is arranged at the end of the second traction rod, the second sliding sleeve is sleeved and slidably matched with the second guide rod, the second traction claw is connected to the other end of the second traction rod and extends in a third direction to exceed the first traction claw, and two groups of the second traction structures are arranged in parallel on the first traction structure;

[0009] The retraction depths of the first retraction claw and the second retraction claw are the same or different, the first retraction claw is used to perform a retraction action in a first direction, and the second retraction claw is used to perform a retraction action in the first direction or the second direction.

[0010] Optionally, the second traction rod includes a first rod body and a second rod body, the end of the first rod body is provided with the second sliding sleeve, one end of the second rod body has a hollow cavity, and the other end is connected to the second traction claw, the other end of the first rod body slides into the hollow cavity, and the side wall of the second rod body is provided with a first side hole, and the first side hole is provided with a first tightening screw with threaded fit, and the first tightening screw is suitable for rotating relative to the first side hole and pressing the end onto the first rod body.

[0011] Optionally, the cross-sectional shapes of the first rod body and the hollow cavity are circular or rectangular with corresponding sizes.

[0012] Optionally, a guide groove extending along a first direction is provided on the first guide rod, a first rack is provided in the guide groove, a first through hole is opened on the first sliding sleeve, a first rotating member is rotatably provided on the first through hole, one end of the first rotating member extends into the guide groove and a first gear is provided on the end thereof, the first gear cooperates with the first rack to drive the first guide rod to move along the guide groove.

[0013] Optionally, the first rotating member also includes a first rotating rod rotatably engaged with the first through hole, and a first rotating head arranged at an end of the first rotating rod away from the first through hole, the radial dimension of the first rotating head is larger than the radial dimension of the first rotating rod and has a first gap with the first sliding sleeve, and the first gap is movably provided with a first wedge block, and the first wedge block is used to extend into the first gap and be pressed between the first sliding sleeve and the first rotating head.

[0014] Optionally, a first expansion groove is provided at the bottom of the first slide groove, and the bottom of the slide table has a flange that slides with the first expansion groove; the top of the slide table is located in the second slide groove, and a first threaded hole is opened on the top of the slide table. A spinning screw is provided at the end of the first slide groove away from the slide table, and the spinning screw includes a spinning block and a threaded rod, the threaded rod cooperates with the first threaded hole, and the spinning block rotates coaxially with the threaded rod and is suitable for being pressed tightly on the connecting rod.

[0015] Optionally, the slide includes a first part cooperating with the first slide groove and a second part extending out of the slide groove, the radial dimension of the first part is larger than the dimension of the second part, and the second slide groove corresponds to the dimension of the second part.

[0016] Optionally, the second guide rod is provided with a side groove extending along the first direction, a second rack is provided in the side groove, a second through hole corresponding to the side groove is provided on the second sliding sleeve, a second rotating member is rotatably provided in the second through hole, one end of the second rotating member extends into the side groove and a second gear is provided at the end thereof, the second gear cooperates with the second rack to drive the second traction rod to move along the extension direction of the side groove.

[0017] Optionally, the second rotating member also includes a second rotating rod rotatably engaged with the second through hole, and second rotating heads arranged at two ends of the second rotating rod away from the second through hole, the radial dimension of the second rotating head is larger than the radial dimension of the second rotating rod and there is a second gap between the second sliding sleeve, and the second gap is movably provided with a second wedge block, and the second wedge block is used to extend into the second gap and be pressed between the second sliding sleeve and the second rotating head.

[0018] Optionally, the handle portion is provided with a protrusion.

[0019] Beneficial effects:

[0020] The tissue retractor provided by the present invention comprises a handle portion, a first retracting structure and a second retracting structure.

[0021] The handle portion has a first guide rod extending in a first direction. The first retraction structure includes a first traction rod and a first traction claw. One end of the first traction rod has a first sliding sleeve, which is sleeved and slidably matched with the first guide rod. The first traction rod extends in a second direction, which is coplanar and perpendicular to the first direction. The first traction claw is arranged at the bottom of the first traction rod. The first traction claw extends in a third direction, which is perpendicular to the plane where the first direction and the second direction are located. Two groups of first retraction structures are arranged on the first guide rod. The second retraction structure includes a connecting rod, a second guide rod, a second traction rod and a second traction claw. The top of the first traction rod is provided with a first slide groove extending in the second direction, a slide table is arranged in the first slide groove, the connecting rod has a second slide groove extending in the first direction and allowing the slide table to extend into, the second guide rod is arranged in parallel with the connecting rod and the two end edges are connected to the connecting rod, the end of the second traction rod is provided with a second sliding sleeve, which is sleeved and slidably matched with the second guide rod, the second traction claw is connected to the other end of the second traction rod and extends in the third direction to exceed the first traction claw, and the two groups of second retraction structures are arranged in parallel on the first retraction structure. The retraction depths of the first retraction claw and the second retraction claw are the same or different, the first retraction claw is used to perform a retraction action in a first direction, and the second retraction claw is used to perform a retraction action in the first direction or the second direction.

[0022] The handle is convenient for medical staff to pinch or hold for alignment operation. The two groups of first traction rods can slide in the first direction through the cooperation of the first sliding sleeve and the first guide rod, and the two groups of first traction claws move synchronously with the corresponding first traction rods, so as to achieve tissue traction in the first direction. The two groups of connecting rods are arranged in parallel on the two groups of first traction rods and extend along the first direction, and the two groups of connecting rods can slide in the second direction through the cooperation of the corresponding slide and the first slide groove, respectively. The two groups of second guide rods are parallel to the corresponding connecting rods and connected to the relative edges, and the two groups of second traction rods are slidably arranged on the second guide rods through the second sliding sleeves, so that the second traction rods can slide in the first direction, thereby driving the second traction claws connected to the bottom of the second connecting rod to slide synchronously in the first direction.

[0023] In actual application, medical staff can use the first traction claw to retract the tissue along the first direction, and can select the retraction direction of the second traction claw according to actual needs. For example, when it is necessary to use the second retraction structure to deeply retract the tissue in the first direction, after the first retraction structure retracts the tissue, the two slides on each first traction rod can be moved to the edge position, and then the second slide groove of the connecting rod is aligned with the two slides in the first direction. The two connecting rods are installed, and the second traction claw is adjusted to face the first direction. Then, the second sliding sleeve and the second guide rod can be used to cooperate to drive the second traction rod and the second traction claw to slide in the first direction. Two second traction rods are arranged on the second guide rod, and the two second traction rods slide relative to each other, so that the two second traction claws move relative to each other in the first direction to deeply retract the tissue. Similarly, the two second traction rods located on the other second guide rod can also perform the same retraction action, thereby completing the deep retraction of the tissue, wherein the depth of the second traction claw is greater than the depth of the first traction claw.

[0024] When it is necessary to use the second retraction structure to retract the tissue in the second direction, after the first retraction structure retracts the tissue, the two slides on each first traction rod can be moved to the center position, and then the second slide groove of the connecting rod can be installed in alignment with the two slides in the first direction, thereby installing the two connecting rods, and the second traction claw is adjusted to face the second direction, and then the two groups of connecting rods can be moved in opposite directions in the second direction by using the cooperation of the slide and the second slide groove, so that the second traction claw is driven to move in opposite directions in the second direction by the second guide rod and the second traction rod, so that the second traction claw retracts the tissue in the second direction. Combined with the effect of the first traction claw retracting the tissue in the first direction, it is achieved that the tissue is retracted in the first direction and in the second direction perpendicular to the first direction, making the surgical field clearer.

[0025] The above two retraction methods can be selected according to actual needs to achieve deep retraction, especially for patients with more fat tissue. Such a setting is more conducive to exposing the subfat tissue within the surgical field, so that it can adapt to the retraction needs of patients of different body shapes and the needs of retraction surgeries of different depths. There will be no problem of interference in retraction movement, and the operation can be completed efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a tissue retractor according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0029] Figure 3 This is a schematic diagram of the disassembled structure of the tissue retractor according to an embodiment of the present invention;

[0030] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0031] Figure 5 A partial cross-sectional structural schematic diagram of a tissue retractor according to an embodiment of the present invention;

[0032] Figure 6 for Figure 5 A partial enlarged schematic diagram of point C in the middle;

[0033] Figure 7 for Figure 5 A partial enlarged schematic diagram of point D in the middle;

[0034] Figure 8 It is a structural schematic diagram of a second traction claw located at a first angle according to an embodiment of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of a second pulling grip in an embodiment of the present invention, which is located at a second angle;

[0036] Fig.10 Schematic diagram of the cross-sectional structure of the second traction rod according to an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. handle portion; 11. first guide rod; 111. guide groove; 112. first rack; 12. protrusion; 21. first traction rod; 22. first traction claw; 23. first sliding sleeve; 24. first sliding groove; 241. expansion groove; 25. slide; 251. first threaded hole; 252. first part; 253. second part; 254. flange; 26. first rotating head; 261. first rotating rod; 262. first gear; 27. spinning block; 271. threaded rod; 28. first wedge block; 31. connecting rod; 311. second sliding groove; 32. second guide rod; 321. second rack; 33. second traction rod; 331. first rod body; 332. second rod body; 333. first tightening screw; 34. second traction claw; 35. second sliding sleeve; 361. second rotating rod; 362. second gear; 363. second rotating head. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 , Figure 3 , Figure 5 and Figure 8 As shown, the tissue retractor provided by the present invention comprises: a handle portion 1, a first retracting structure and a second retracting structure.

[0041] The handle portion 1 has a first guide rod 11 extending along a first direction.

[0042] The first traction structure includes a first traction rod 21 and a first traction claw 22. One end of the first traction rod 21 has a first sliding sleeve 23. The first sliding sleeve 23 is sleeved and slidably matched with the first guide rod 11. The first traction rod 21 extends along the second direction. The second direction is coplanar and perpendicular to the first direction. The first traction claw 22 is arranged at the bottom of the first traction rod 21. The first traction claw 22 extends along the third direction. The third direction is perpendicular to the plane where the first direction and the second direction are located. Two sets of first traction structures are arranged on the first guide rod 11. Figure 1 The double-headed arrows in the figure indicate the first direction and the second direction. Figure 5 The double-headed arrow indicates the third direction.

[0043] The second pulling-away structure includes a connecting rod 31, a second guide rod 32, a second traction rod 33 and a second pulling claw 34. A first slide groove 24 extending in the second direction is provided at the top of the first traction rod 21, a slide 25 is provided in the first slide groove 24, the connecting rod 31 has a second slide groove 311 extending in the first direction and allowing the slide 25 to extend into, the second guide rod 32 is arranged parallel to the connecting rod 31 and the two ends of the second traction rod 33 are connected to the connecting rod 31, a second sliding sleeve 35 is provided at the end of the second traction rod 33, the second sliding sleeve 35 is sleeved and slidably matched with the second guide rod 32, the second pulling claw 34 is connected to the other end of the second traction rod 33, and extends in the third direction to exceed the first pulling claw 22, and the two sets of second pulling-away structures are arranged in parallel on the first pulling-away structure. The pulling depths of the first pulling claw and the second pulling claw are the same or different, the first pulling claw 22 is used to perform pulling action in the first direction, and the second pulling claw 34 is used to perform pulling action in the first direction or the second direction.

[0044] The handle portion 1 is convenient for medical staff to pinch or hold for alignment operation. The two groups of first traction rods 21 can slide in the first direction through the cooperation of the first sliding sleeve 23 and the first guide rod 11, and the two groups of first traction claws 22 move synchronously with the corresponding first traction rods 21, so as to achieve tissue traction in the first direction. The two groups of connecting rods 31 are arranged in parallel on the two groups of first traction rods 21 and extend along the first direction, and the two groups of connecting rods 31 can slide in the second direction through the cooperation of the corresponding slide 25 and the first slide groove 24, respectively. The two groups of second guide rods 32 are respectively parallel to the corresponding connecting rods 31 and connected to the opposite edges. The two groups of second traction rods 33 are respectively slidably arranged on the second guide rods 32 through the second sliding sleeves 35, so that the second traction rods 33 can slide in the first direction, thereby driving the second traction claws 34 connected to the bottom of the second connecting rods 31 to slide synchronously in the first direction.

[0045] In actual application, medical staff can use the first traction claw 22 to retract the tissue along the first direction, and can select the retraction direction of the second traction claw 34 according to actual needs. For example, when it is necessary to use the second retraction structure to deeply retract the tissue in the first direction, after the first retraction structure retracts the tissue, the two slides 25 on each first traction rod 21 can be moved to the edge position, and then the second slide groove 311 of the connecting rod 31 is aligned with the two slides 25 in the first direction, thereby installing the two connecting rods 31, and adjusting the second traction claw 34 to face the first direction, and then the cooperation of the second sliding sleeve 35 and the second guide rod 32 can be used to drive the second traction rod 33 and the second traction claw 34 to slide along the first direction. Two second traction rods 33 are arranged on the second guide rod 32, and the two second traction rods 33 slide relatively, so that the two second traction claws 34 move relatively in the first direction to deeply retract the tissue. Similarly, the two second traction rods 33 located on the other second guide rod 32 can also perform the same retraction action, thereby completing the deep retraction of the tissue, wherein the depth of the second traction claw 34 is greater than the depth of the first traction claw 22.

[0046] When the second retraction structure needs to be used to retract the tissue in the second direction, after the first retraction structure retracts the tissue, the two slides 25 on each first traction rod 21 can be moved to the center position, and then the second slide groove 311 of the connecting rod 31 is installed in alignment with the two slides 25 in the first direction, thereby installing the two connecting rods 31, and adjusting the second traction claws 34 to face the second direction, and then the two groups of connecting rods 31 can be moved in opposite directions in the second direction by utilizing the cooperation of the slide 25 and the second slide groove 311, thereby driving the second traction claws 34 to move in opposite directions in the second direction through the second guide rod 32 and the second traction rod 33, so that the second traction claws 34 retract the tissue in the second direction, combined with the effect of the first traction claws 22 on retracting the tissue in the first direction, it is achieved that the tissue is retracted in the first direction and in the second direction perpendicular to the first direction, so that the surgical field is clearer.

[0047] The above two retraction methods can be selected according to actual needs to achieve deep retraction, especially for patients with more fat tissue. Such a setting is more conducive to exposing the subfat tissue within the surgical field, so that it can adapt to the retraction needs of patients of different body shapes and the needs of retraction surgeries of different depths. There will be no problem of interference in retraction movement, and the operation can be completed efficiently.

[0048] In this embodiment, the traction size in the first direction can be 4 cm to 8 cm, corresponding to the distance between the two first traction claws, the traction size in the second direction can be 4 cm to 8 cm, corresponding to the distance between the two second traction claws, and the traction depth in the third direction can be 3 cm to 8 cm, corresponding to the depth of the first traction claw or the depth of the second traction claw. Of course, the above traction sizes and traction depths can also be produced according to actual conditions, and the above are examples.

[0049] In this embodiment, two first traction structures are provided, and two second traction structures are provided, wherein a second traction rod 33 and a second traction claw 34 combination may be provided on the second guide rod 32 of the second traction structure, for pulling the tissue apart in the second direction, or a combination of two second traction rods 33 and second traction claws 34 may be provided on the second guide rod 32, for pulling the tissue apart deeply in the first direction. In addition, the sizes of the first traction claw 22 and the second traction claw 34 may be set according to actual needs. The connecting rod 31 of each set of the second traction structures is suitable for being matched through two slides 25 relatively provided on the two first traction rods 21.

[0050] like Figure 8 , Fig. 9 and Fig.10As shown, in this embodiment, the second traction rod 33 includes a first rod body 331 and a second rod body 332, a second sliding sleeve 35 is provided at the end of the first rod body 331, one end of the second rod body 332 has a hollow cavity, and the other end is connected to the second traction claw 34, the other end of the first rod body 331 slides into the hollow cavity, a first side hole is provided on the side wall of the second rod body 332, a first screwing screw 333 with threaded fit is provided on the first side hole, and the first screwing screw 333 is suitable for rotating relative to the first side hole and pressing the end against the first rod body 331. When it is necessary to adjust the length of the second traction rod 33 or the orientation of the second traction claw 34, the first screwing screw 333 can be screwed out, and after the second rod body 332 is controlled to slide relative to the first rod body 331 into place, the first screwing screw 333 is screwed to press against the first rod body 331.

[0051] like Figure 8 and Fig. 9 As shown, in this embodiment, the cross-sectional shape of the first rod body 331 and the hollow cavity is a circle or a rectangle of corresponding size. When the cross-sectional shape is a circle, the orientation of the second traction claw 34 has more adjustment angles. When the cross-sectional shape is a rectangle, the orientation of the second traction claw 34 can be quickly adjusted between the first direction and the second direction.

[0052] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, in this embodiment, a guide groove 111 extending along the first direction is provided on the first guide rod 11, a first rack 112 is provided in the guide groove 111, a first through hole is provided on the first sliding sleeve 23, a first rotating member is rotatably provided on the first through hole, one end of the first rotating member extends into the guide groove 111 and a first gear 262 is provided on the end thereof, the first gear 262 cooperates with the first rack 112 to drive the first guide rod 11 to move along the guide groove 111, the first rotating member is rotated, and the first gear 262 rotates. Since the first rack is fixed to the guide groove 111, the first sliding sleeve 23 can slide relative to the first guide rod 11, thereby driving the first traction rod 21 to slide along the first direction, so that the first traction claw 22 can pull the tissue apart in the first direction.

[0053] like Figure 1 , Figure 2 , Figure 5 and Figure 7As shown, in this embodiment, the first rotating member also includes a first rotating rod 261 that is rotatably matched with the first through hole, and a first rotating head 26 that is arranged at one end of the first rotating rod 261 away from the first through hole. The radial dimension of the first rotating head 26 is greater than the radial dimension of the first rotating rod 261 and there is a first gap between the first sliding sleeve 23. A first wedge block 28 is movably arranged in the first gap. The first wedge block 28 is used to extend into the first gap and press between the first sliding sleeve 23 and the first rotating head 26. The first rotating head 26 can control the rotation of the first rotating rod 261 and thus control the rotation of the first gear 262 relative to the first rack 112. The first wedge block 28 is detachably embedded in the gap between the first rotating head 26 and the first sliding sleeve 23. Under the action of friction, the first rotating head 26 cannot rotate, thereby limiting the position of the first traction rod 21, which is convenient for the subsequent installation of the second traction structure.

[0054] In this embodiment, a first mounting opening is provided at an edge of the first guide rod 11 away from the handle portion 1, and the guide groove 111 extends to pass through the first mounting opening. The first sliding sleeve 23 and the first rotating member can be installed on the first guide rod 11 through the first mounting opening, and the first mounting opening can be sealed by a first sealing cover.

[0055] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the bottom of the first slide groove 24 is provided with a first expansion groove 241, and the bottom of the slide 25 has a flange 254 that is slidably matched with the first expansion groove 241, so that the slide 25 can be prevented from slipping out of the first slide groove 24. The top of the slide 25 is located in the second slide groove 311, that is, the end of the slide 25 does not extend out of the second slide groove 311, and the top of the slide 25 is provided with a first threaded hole 251. The end of the first slide groove 24 away from the slide 25 is provided with a spinning screw, which includes a spinning block 27 and a threaded rod 271, and the threaded rod 271 is matched with the first threaded hole 251. The spinning block 27 rotates coaxially with the threaded rod 271 and is suitable for being pressed on the connecting rod 31. The spinning block 27 moves toward the direction close to the connecting rod 31 through the threaded rod 271 until it contacts and presses the connecting rod 31. Under the action of friction, the spinning block 27 can lock the connecting rod 31 on the first traction rod 21 to facilitate the subsequent adjustment of the position of the second traction rod 33. The cross-sectional shape of the flange 254 can be rectangular, so that it can not only slide with the expansion groove 241, but also prevent the slide table 25 from axial rotation, playing a role of limiting movement.

[0056] like Figure 5 , Figure 6 and Figure 7As shown, in this embodiment, the slide 25 includes a first portion 252 that cooperates with the first slide groove 24 and a second portion 253 that extends out of the slide groove. The radial dimension of the first portion 252 is greater than the dimension of the second portion 253. The second slide groove 311 corresponds to the dimension of the second portion 253, so that if the dimension of the second portion 253 is reduced, the dimension of the second slide groove 311 can also be reduced, which is beneficial to improving the mechanical strength of the connecting rod 31. The cross-sectional shape of the first portion 252 can be rectangular in addition to circular, which is beneficial to the sliding cooperation between the first portion 252 and the first slide groove 24, and further avoiding the axial rotation of the slide 25.

[0057] like Figure 5 and Figure 6 As shown, in this embodiment, the second guide rod 32 is provided with a side groove extending in the first direction, a second rack 321 is provided in the side groove, a second through hole corresponding to the side groove is provided on the second sliding sleeve 35, a second rotating member is rotatably provided in the second through hole, one end of the second rotating member extends into the side groove and a second gear 362 is provided at the end, and the second gear 362 cooperates with the second rack 321 to drive the second traction rod 33 to move along the extension direction of the side groove. The second rotating member is rotated, and the second gear 362 rotates. Since the second rack 321 is fixed to the side groove, the second sliding sleeve 35 can slide relative to the second guide rod 32, thereby driving the second traction rod 33 to slide along the first direction, so that the second traction claw 34 can pull the tissue apart in the first direction.

[0058] like Figure 5 and Figure 6 As shown, in this embodiment, the second rotating member also includes a second rotating rod 361 that is rotatably matched with the second through hole, and a second rotating head 363 that is arranged at the two ends of the second rotating rod 361 away from the second through hole. The radial dimension of the second rotating head 363 is larger than the radial dimension of the second rotating rod 361 and has a second gap with the second sliding sleeve 35. The second gap is movably provided with a second wedge block, which is used to extend into the second gap and press between the second sliding sleeve 35 and the second rotating head 363. The second rotating head 363 can control the rotation of the second rotating rod 361 and thus control the rotation of the second gear 362 relative to the second rack 321. The second wedge block is detachably embedded in the gap between the second rotating head 363 and the second sliding sleeve 35. Under the action of friction, the second rotating head 363 cannot rotate, thereby limiting the position of the second traction rod 33, which is convenient for subsequent surgery.

[0059] In this embodiment, the second guide rod 32 is provided with a second mounting opening at its edge, and the side groove extends to penetrate the second mounting opening. The second sliding sleeve 35 and the second rotating member can be installed on the second guide rod 32 through the second mounting opening, and the second mounting opening can be sealed by a second sealing cover. The second sealing cover can be provided with an insert, and the edge of the connecting rod 31 can be provided with an insert groove, so that the second guide rod 32 is installed on the connecting rod 31 by using the second sealing cover, so that the edge of the second guide rod 32 is connected to the connecting rod 31, so that there is a space between the two to allow the second sliding sleeve 35 to slide.

[0060] like Figure 1 As shown, in this embodiment, the handle portion 1 is provided with a protrusion 12, which can facilitate operation by medical personnel.

[0061] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A tissue retractor, characterized in that: include: A handle portion (1) having a first guide rod (11) extending along a first direction; A first pulling structure comprises a first pulling rod (21) and a first pulling claw (22), one end of the first pulling rod (21) is provided with a first sliding sleeve (23), the first sliding sleeve (23) is sleeved and slidably matched with the first guide rod (11), the first pulling rod (21) extends along a second direction, the second direction is coplanar and perpendicular to the first direction, the first pulling claw (22) is arranged at the bottom of the first pulling rod (21), the first pulling claw (22) extends along a third direction, the third direction is perpendicular to the plane where the first direction and the second direction are located, and two groups of the first pulling structures are arranged on the first guide rod (11); A second traction structure comprises a connecting rod (31), a second guide rod (32), a second traction rod (33) and a second traction claw (34); a first slide groove (24) extending along a second direction is arranged at the top of the first traction rod (21); a slide table (25) is arranged in the first slide groove (24); the connecting rod (31) has a second slide groove (311) extending along the first direction and allowing the slide table (25) to extend into; the second guide rod (32) is arranged parallel to the connecting rod (31) and the two end edges are connected to the connecting rod (31); a second sliding sleeve (35) is arranged at the end of the second traction rod (33); the second sliding sleeve (35) is sleeved and slidably matched with the second guide rod (32); the second traction claw (34) is connected to the other end of the second traction rod (33) and extends along the third direction to exceed the first traction claw (22); two groups of the second traction structures are arranged in parallel on the first traction structure; The first and second retraction claws have the same or different retraction depths, the first traction claw (22) is used to perform a traction action in a first direction, and the second traction claw (34) is used to perform a traction action in the first direction or the second direction.

2. The tissue retractor according to claim 1, characterized in that: The second traction rod (33) comprises a first rod body (331) and a second rod body (332); the end of the first rod body (331) is provided with the second sliding sleeve (35); one end of the second rod body (332) has a hollow cavity, and the other end is connected to the second traction claw (34); the other end of the first rod body (331) slides into the hollow cavity; a first side hole is formed on the side wall of the second rod body (332); a first screwing screw (333) with threaded engagement is provided on the first side hole; the first screwing screw (333) is adapted to rotate relative to the first side hole and press the end of the screw on the first rod body (331).

3. The tissue retractor according to claim 2, characterized in that: The cross-sectional shapes of the first rod body (331) and the hollow cavity are circular or rectangular with corresponding sizes.

4. The tissue retractor according to any one of claims 1 to 3, characterized in that: The first guide rod (11) is provided with a guide groove (111) extending along a first direction, a first rack (112) is provided in the guide groove (111), a first through hole is provided on the first sliding sleeve (23), a first rotating member is rotatably provided on the first through hole, one end of the first rotating member extends into the guide groove (111) and a first gear (262) is provided on the end thereof, the first gear (262) cooperates with the first rack (112) to drive the first guide rod (11) to move along the guide groove (111).

5. The tissue retractor according to claim 4, characterized in that: The first rotating member also includes a first rotating rod (261) rotatably engaged with the first through hole, and a first rotating head (26) arranged at an end of the first rotating rod (261) away from the first through hole, the radial dimension of the first rotating head (26) is larger than the radial dimension of the first rotating rod (261) and has a first gap with the first sliding sleeve (23), and the first gap is movably provided with a first wedge block (28), and the first wedge block (28) is used to extend into the first gap and be pressed between the first sliding sleeve (23) and the first rotating head (26).

6. The tissue retractor according to any one of claims 1 to 3, characterized in that: The bottom of the first slide groove (24) is provided with a first expansion groove (241), and the bottom of the slide (25) has a flange (254) that slides with the first expansion groove (241); the top of the slide (25) is located in the second slide groove (311), and the top of the slide (25) is provided with a first threaded hole (251); the end of the first slide groove (24) away from the slide (25) is provided with a spinning screw, and the spinning screw includes a spinning block (27) and a threaded rod (271), and the threaded rod (271) cooperates with the first threaded hole (251), and the spinning block (27) rotates coaxially with the threaded rod (271) and is suitable for being pressed onto the connecting rod (31).

7. The tissue retractor according to claim 6, characterized in that: The slide (25) includes a first portion (252) that cooperates with the first slide groove (24) and a second portion (253) that extends out of the slide groove. The radial dimension of the first portion (252) is greater than the dimension of the second portion (253). The second slide groove (311) corresponds to the dimension of the second portion (253).

8. The tissue retractor according to any one of claims 1 to 3, characterized in that: The second guide rod (32) is provided with a side groove extending along the first direction, and a second rack (321) is provided in the side groove. The second sliding sleeve (35) is provided with a second through hole corresponding to the side groove, and a second rotating member is rotatably provided in the second through hole. One end of the second rotating member extends into the side groove and a second gear (362) is provided at the end thereof. The second gear (362) cooperates with the second rack (321) to drive the second traction rod (33) to move along the extension direction of the side groove.

9. The tissue retractor according to claim 8, characterized in that: The second rotating member also includes a second rotating rod (361) rotatably matched with the second through hole, and a second rotating head (363) arranged at the two ends of the second rotating rod (361) away from the second through hole, the radial dimension of the second rotating head (363) is larger than the radial dimension of the second rotating rod (361) and has a second gap with the second sliding sleeve (35), and the second gap is movably provided with a second wedge block, which is used to extend into the second gap and be pressed between the second sliding sleeve (35) and the second rotating head (363).

10. The tissue retractor according to claim 1, characterized in that: The handle portion (1) is provided with a protrusion (12).

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