Adjustable liver operation drag hook

Abstract

The utility model relates to the technical field of operation drag hooks, and discloses an adjustable liver operation drag hook which comprises a handle, an adjusting shell is installed at one end of the handle, an adjusting unit is installed in the adjusting shell, the adjusting unit comprises two toothed plates and a threaded rod, the two toothed plates are connected with the inner wall of the adjusting shell in a sliding mode, and tooth openings in the two toothed plates are oppositely distributed. The threaded rod is rotationally connected to the adjusting shell, a receding groove corresponding to the threaded rod is formed in the outer wall, away from the handle, of one toothed plate, and the outer end of the threaded rod is fixedly connected with a screwing head. The adjusting shell is installed at the end of the handle, the adjusting unit is installed in the adjusting shell, the distance between the two adjusting hook units is adjusted through the adjusting unit, and a main knife can adjust the depth and the width of the drag hook through the two adjusting hook units with the distance capable of being adjusted so as to meet different operation requirements. And meanwhile, a gap between the two adjusting hook units spans an operation area so as to better expose an operation view field.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical retractors, in particular to an adjustable liver surgical retractor. Background Art

[0002] A liver surgery retractor is an auxiliary instrument used to open the chest cavity to increase the surgical field of view, lift the liver, etc. It is generally an S-shaped or hook-shaped metal instrument to facilitate doctors to perform surgical treatment on patients.

[0003] The prior art, such as the patent with publication number CN202235504U, discloses a double-headed abdominal surgical retractor with finger holes, which includes an abdominal surgical retractor body with a straight middle section, a small curved hook at one end of the straight section, and a large curved hook at the other end, and a plurality of finger holes are provided on the abdominal surgical retractor body. It has the advantages of being labor-saving and not easy to slip, and is easy to use. It has better use effect, the user's fingers can be inserted into the finger holes, the gripping area is smaller, the hands are not easy to get tired after long-term use, and it will not affect the vision of the surgeon.

[0004] The existing technology still has shortcomings:

[0005] Retractors are generally used by assistant doctors to assist the surgeon during the operation. However, due to the obstruction of their chest wall, assistant doctors generally cannot see the surgical area during the operation, resulting in a blind spot in vision. As a result, assistant doctors dare not use too much force to pull the hook during the operation. If the force is not enough, the surgical area will not be displayed well. If the force is too much, the retractor will pierce the liver, causing additional damage or even massive bleeding during the operation. Therefore, the surgeon needs to constantly communicate the position and strength of the retractor during the operation, which affects the efficiency and safety of the operation. At the same time, due to the limited width of the retractor, if the core visual field area of ​​the operation is to be exposed, an additional retractor is needed to help, which requires an extra hand to complete the task. Due to space limitations on the operating table, there is an upper limit on the number of assistants participating in the operation, which restricts the assistants. For this reason, an adjustable liver surgery retractor is proposed. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides an adjustable liver surgery retractor, which improves the field of view of the retractor when in use and improves adaptability to meet different surgical field of view requirements.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable liver surgery retractor, comprising a handle, an adjusting shell is installed at one end of the handle, an adjusting unit is installed in the adjusting shell, the adjusting unit comprises two tooth plates and a threaded rod, the two tooth plates are slidably connected to the inner wall of the adjusting shell, the teeth on the two tooth plates are oppositely distributed, the threaded rod is rotatably connected to the adjusting shell, a yield groove corresponding to the threaded rod is provided on the outer wall of one of the tooth plates away from the handle, a screw head is fixedly connected to the outer end of the threaded rod, a gear is fixedly connected to the other end of the threaded rod, the gear is meshed with the two tooth plates, a sliding groove is provided on the bottom surface of the lower end of the adjusting shell, and an adjusting hook unit slidably connected to the sliding groove is fixedly connected to the bottom surface of one end of the tooth plate.

[0008] Preferably, the adjustment shell includes two symmetrical shells, one end of each shell is provided with a sleeve groove, a limit sleeve is movably provided between the sleeve grooves at adjacent ends of the two shells, two tooth plates are slidably connected between the two shells, the threaded rod is rotatably connected to one of the shells, and the slide groove is opened on the bottom surface of the lower end of the two shells.

[0009] Preferably, the adjustment unit further comprises a nut, which is threadedly connected to the outer wall of the threaded rod, and the nut is located outside the housing, and the nut abuts against the outer wall of the adjacent housing.

[0010] Preferably, the maximum diameter of the nut is greater than the maximum diameter of the screw head.

[0011] Preferably, the adjusting hook unit includes an adjusting sleeve, which is a T-shaped structure. The upper end of the adjusting sleeve is slidably connected to the slide groove and fixedly connected to the bottom surface of the tooth plate. A bent hook is slidably connected inside the adjusting sleeve. A limiting groove is provided on one side of the bent hook. The limiting groove is a T-shaped structure. An extrusion sleeve is fixedly connected to the outer wall of the adjusting sleeve. A pull rod is slidably connected to the extrusion sleeve. One end of the pull rod is inserted into the limiting groove and fixedly connected to a pull plate. The length of the pull plate is greater than the width of the opening of the limiting groove. The other end of the pull rod is fixedly connected to a connecting rod. The outer wall of the connecting rod is rotatably connected to an eccentric head that is extruded by the extrusion sleeve.

[0012] Preferably, the eccentric head is located on a side of the adjusting sleeve opposite to the bending direction of the hook, and the screw head is located on a side of one of the housings away from the handle.

[0013] Preferably, the adjustment shell also includes a mounting groove opened in one of the outer walls of the shell, the handle includes a handle rod and a mounting plate, the mounting plate is fixedly connected to one end of the handle rod, the mounting plate and the mounting groove are movably disassembled, and the mounting plate is fixedly connected to the shell by bolts.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model installs an adjustment shell at the end of the handle, and an adjustment unit is installed in the adjustment shell. The adjustment unit adjusts the distance between the two adjustment hook units. The surgeon can use the two adjustment hook units with adjustable distances to adjust the depth and width of the retractor to meet different surgical needs. At the same time, the gap between the two adjustment hook units spans the surgical area to better reveal the surgical field of view.

[0016] 2. The adjusting hook unit in the utility model mainly comprises an adjusting sleeve and a curved hook. The curved hook can slide and lock in the adjusting sleeve, thereby improving adaptability and meeting different surgical requirements.

[0017] 3. The regulating shell in the utility model can be disassembled to facilitate cleaning and disinfection to avoid cross contamination.

[0018] 4. The handle and the adjustment shell in the utility model can be separated to reduce the occupied space and facilitate storage.

[0019] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the explosion structure of the regulating shell of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 It is a cross-section of the housing of the utility model and a schematic diagram of the installation method of the handle;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the adjustment sleeve of the utility model;

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the bending hook of the utility model.

[0026] In the figure: 1. handle; 11. handle rod; 12. mounting plate; 2. adjusting shell; 21. outer shell; 22. sleeve groove; 23. mounting groove; 24. limiting sleeve; 3. adjusting unit; 31. tooth plate; 32. clearance groove; 33. threaded rod; 34. gear; 35. screw head; 36. nut; 4. adjusting hook unit; 41. adjusting sleeve; 42. bent hook; 43. limiting groove; 44. extrusion sleeve; 45. pull plate; 46. pull rod; 47. eccentric head; 48. connecting rod; 5. slide groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this technical field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-6 The adjustable liver surgery retractor comprises a handle 1, an adjusting shell 2 is installed at one end of the handle 1, an adjusting unit 3 is installed in the adjusting shell 2, the adjusting unit 3 comprises two tooth plates 31 and a threaded rod 33, the two tooth plates 31 are slidably connected to the inner wall of the adjusting shell 2, the teeth on the two tooth plates 31 are oppositely distributed, the threaded rod 33 is rotatably connected to the adjusting shell 2, the outer wall of one of the tooth plates 31 away from the handle 1 is provided with a give way groove 32 corresponding to the threaded rod 33, the outer end of the threaded rod 33 is fixedly connected with a screw head 35, the other end of the threaded rod 33 is fixedly connected with a gear 34, the gear 34 is meshed with the two tooth plates 31, a slide groove 5 is provided on the bottom surface of the lower end of the adjusting shell 2, and an adjusting hook unit 4 slidably connected to the slide groove 5 is fixedly connected to the bottom surface of one end of the tooth plate 31

[0029] like Figure 1-4As shown, the surgical retractor structure in the utility model is similar to the existing surgical retractor structure, such as the double-headed abdominal surgical retractor with finger pulling holes disclosed in the patent with publication number CN202235504U. The main improvement of the utility model is to improve the field of view of the retractor when in use, and at the same time improve the adaptability to meet different surgical field of view requirements; when the retractor needs to be used to expand the surgical field of view, according to the needs of the surgical field of view, the screw head 35 is rotated, the screw head 35 drives the threaded rod 33 to rotate, the threaded rod 33 drives the gear 34 to rotate, and the gear 34 drives the two gears The plates 31 move oppositely in the adjustment shell 2, and the two tooth plates 31 respectively drive the two adjustment hook units 4 to move away from or closer to each other. The upper ends of the adjustment hook units 4 slide in the slide groove 5 to adjust the distance between the two adjustment hook units 4. The doctor holds the handle 1, puts the two adjusted adjustment hook units 4 into the chest cavity and pulls them, thereby expanding the surgical field of view. The surgeon can use the two adjustable adjustment hook units 4 to adjust the depth and width of the retractor to adapt to different surgical needs. At the same time, the gap between the two adjustment hook units 4 spans the surgical area to better reveal the surgical field of view.

[0030] like Figure 2 As shown, the adjustment shell 2 includes two symmetrical shells 21, one end of each of the two shells 21 is provided with a sleeve groove 22, a limit sleeve 24 is movably sleeved between the sleeve grooves 22 at the adjacent ends of the two shells 21, two tooth plates 31 are slidably connected between the two shells 21, the threaded rod 33 is rotatably connected to one of the shells 21, and the slide groove 5 is provided on the bottom surface of the lower end of the two shells 21; by pulling the two limit sleeves 24 out of the sleeve grooves 22, the two shells 21 can be disassembled, thereby facilitating the cleaning and disinfection of the internal structure thereof to avoid cross infection, and the limit sleeve 24 limits the two shells 21 by being sleeved on the sleeve grooves 22 at the ends of the two shells 21, thereby improving practicality.

[0031] like Figure 3 As shown, the adjustment unit 3 also includes a nut 36, which is threadedly connected to the outer wall of the threaded rod 33, and the nut 36 is located outside the shell 21, and the nut 36 is abutted against the outer wall of the adjacent shell 21; after the spacing between the two adjustment hook units 4 is adjusted, the nut 36 is rotated to make it abut against the outer wall of the adjacent shell 21, thereby achieving a certain restriction on the threaded rod 33, avoiding the phenomenon of unlimited movement of the adjustment hook unit 4 when the force is applied. When it is necessary to adjust the spacing between the two adjustment hook units 4, it is only necessary to screw the nut 36 outward so that the threaded rod 33 can be rotated, thereby improving practicality.

[0032] like Figure 3 As shown, the maximum diameter of the nut 36 is greater than the maximum diameter of the screw head 35 ; the screw head 35 does not block the outer wall of the nut 36 , thereby facilitating the rotation of the nut 36 .

[0033] like Figure 4-6 As shown, the adjusting hook unit 4 includes an adjusting sleeve 41, which is a T-shaped structure. The upper end of the adjusting sleeve 41 is slidably connected to the slide groove 5 and fixedly connected to the bottom surface of the tooth plate 31. A curved hook 42 is slidably connected inside the adjusting sleeve 41. A limiting groove 43 is provided on one side of the curved hook 42. The limiting groove 43 is a T-shaped structure. An extrusion sleeve 44 is fixedly connected to the outer wall of the adjusting sleeve 41. A pull rod 46 is slidably connected inside the extrusion sleeve 44. One end of the pull rod 46 is inserted into the limiting groove 43 and fixedly connected to a pull plate 45. The length of the pull plate 45 is greater than the width of the opening of the limiting groove 43. The other end of the pull rod 46 is fixedly connected to a connecting rod 48. The outer wall of the connecting rod 48 is rotatably connected to an eccentric head 47 that is squeezed with the extrusion sleeve 44; the pull rod 46 can be lowered by lifting the eccentric head 47, so that the pull plate 45 does not abut against the inner wall of the limiting groove 43, and the curved hook 42 can be moved. The curved hook 42 slides in the adjusting sleeve 41 to adjust the overall length of the pull hook. After the adjustment is completed, the eccentric head 47 is pressed down, and the eccentric head 47 drives the pull rod 46 to rise through the connecting rod 48, so that the pull plate 45 abuts against the inner wall of the limiting groove 43, thereby limiting the curved hook 42. At the same time, the eccentric head 47 abuts against the extrusion sleeve 44, and no rotation occurs, which improves adaptability and meets different surgical needs.

[0034] like Figure 1 , 3 As shown in FIGS. 6 and 7 , the eccentric head 47 is located on the side opposite to the bending direction of the adjusting sleeve 41 and the hook 42, and the screw head 35 is located on the side away from one of the shells 21 of the handle 1; the eccentric head 47 and the screw head 35 are both facing outwards, which is convenient for adjusting the whole.

[0035] like Figure 4 As shown, the adjustment shell 2 also includes a mounting groove 23 opened on the outer wall of one of the outer shells 21, and the handle 1 includes a handle rod 11 and a mounting plate 12. The mounting plate 12 is fixedly connected to one end of the handle rod 11, and the mounting plate 12 and the mounting groove 23 are movably disassembled. The mounting plate 12 is fixedly connected to the outer shell 21 by bolts; the mounting plate 12 at the end of the handle rod 11 is inserted into the mounting groove 23, and then the bolts are screwed in to fix the handle rod 11. The handle 1 is detachable to reduce the occupied space and facilitate storage.

[0036] The implementation steps in this embodiment are as follows: when it is necessary to use a retractor to expand the surgical field of view, according to the needs of the surgical field of view, the screw head 35 is rotated, the screw head 35 drives the threaded rod 33 to rotate, the threaded rod 33 drives the gear 34 to rotate, the gear 34 drives the two tooth plates 31 to move oppositely in the adjustment shell 2, the two tooth plates 31 respectively drive the two adjustment hook units 4 to move away from or close to each other, the upper end of the adjustment hook unit 4 slides in the slide groove 5 to adjust the distance between the two adjustment hook units 4, and then the eccentric head is lifted. 47 causes the pull rod 46 to descend, so that the pull plate 45 does not abut against the inner wall of the limiting groove 43, and the curved hook 42 can be moved. The curved hook 42 slides in the adjusting sleeve 41 to adjust the overall length of the pull hook. After the adjustment is completed, the eccentric head 47 is pressed down, and the eccentric head 47 drives the pull rod 46 to rise through the connecting rod 48, so that the pull plate 45 abuts against the inner wall of the limiting groove 43, thereby limiting the curved hook 42. The doctor holds the handle 1, puts the two adjusted curved hooks 42 into the chest cavity and pulls them, thereby expanding the surgical field of view.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An adjustable liver surgery retractor, comprising a handle (1), characterized in that: An adjusting shell (2) is installed at one end of the handle (1), and an adjusting unit (3) is installed in the adjusting shell (2). The adjusting unit (3) comprises two tooth plates (31) and a threaded rod (33). The two tooth plates (31) are slidably connected to the inner wall of the adjusting shell (2). The tooth openings on the two tooth plates (31) are oppositely distributed. The threaded rod (33) is rotatably connected to the adjusting shell (2). An outer wall of one of the tooth plates (31) away from the handle (1) is provided with a giving groove (32) corresponding to the threaded rod (33). A screw head (35) is fixedly connected to the outer end of the threaded rod (33). The other end of the threaded rod (33) is fixedly connected to a gear (34). The gear (34) is meshed with the two tooth plates (31). A sliding groove (5) is provided on the bottom surface of the lower end of the adjusting shell (2). An adjusting hook unit (4) slidably connected to the sliding groove (5) is fixedly connected to the bottom surface of one end of the tooth plate (31).

2. The adjustable liver surgery retractor according to claim 1, characterized in that: The regulating shell (2) comprises two symmetrical shells (21), one end of each of the two shells (21) is provided with a sleeve groove (22), a limit sleeve (24) is movably sleeved between the sleeve grooves (22) at adjacent ends of the two shells (21), two tooth plates (31) are slidably connected between the two shells (21), a threaded rod (33) is rotatably connected to one of the shells (21), and a slide groove (5) is provided on the bottom surface of the lower end of the two shells (21).

3. The adjustable liver surgery retractor according to claim 2, characterized in that: The adjustment unit (3) further comprises a nut (36), the nut (36) being threadedly connected to the outer wall of the threaded rod (33), the nut (36) being located outside the housing (21), and the nut (36) being abutted against the outer wall of the adjacent housing (21).

4. The adjustable liver surgery retractor according to claim 3, characterized in that: The maximum diameter of the nut (36) is greater than the maximum diameter of the screw head (35).

5. The adjustable liver surgery retractor according to claim 2, characterized in that: The adjusting hook unit (4) comprises an adjusting sleeve (41), which is a T-shaped structure. The upper end of the adjusting sleeve (41) is slidably connected to the slide groove (5) and fixedly connected to the bottom surface of the tooth plate (31). A curved hook (42) is slidably connected inside the adjusting sleeve (41). A limiting groove (43) is provided on one side of the curved hook (42). The limiting groove (43) is a T-shaped structure. The outer wall of the adjusting sleeve (41) is fixedly connected to an extrusion sleeve (44). A pull rod (46) is slidably connected inside the extrusion sleeve (44). One end of the pull rod (46) is inserted into the limiting groove (43) and fixedly connected to a pull plate (45). The length of the pull plate (45) is greater than the width of the opening of the limiting groove (43). The other end of the pull rod (46) is fixedly connected to a connecting rod (48). The outer wall of the connecting rod (48) is rotatably connected to an eccentric head (47) that is extruded by the extrusion sleeve (44).

6. The adjustable liver surgery retractor according to claim 5, characterized in that: The eccentric head (47) is located on the side of the adjusting sleeve (41) opposite to the bending direction of the hook (42), and the screw head (35) is located on the side of one of the housings (21) away from the handle (1).

7. The adjustable liver surgery retractor according to claim 2, characterized in that: The adjustment shell (2) further comprises a mounting groove (23) formed on the outer wall of one of the outer shells (21); the handle (1) comprises a handle bar (11) and a mounting plate (12); the mounting plate (12) is fixedly connected to one end of the handle bar (11); the mounting plate (12) and the mounting groove (23) are movably disassembled; and the mounting plate (12) is fixedly connected to the outer shell (21) via bolts.

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