A liver retractor with telescopic adjustment of retractor arc and scratch prevention function

Abstract

The utility model discloses a liver retractor with a telescopic retractor arc anti-scratch function, which relates to the field of medical devices, including a handle assembly, a handle front sleeve, a handle middle sleeve and a handle rear sleeve are sequentially arranged along the axial direction; an outer tube, a plug is installed at the front end for sealing, and the rear end is connected with the handle front sleeve; an adjustment assembly, including an adjustment screw sleeved in the handle front sleeve and an adjustment nut sleeved in the handle middle sleeve, the rear end of the adjustment screw extends out of the handle front sleeve and is threadedly connected to the adjustment nut for transmission, and the adjustment nut is fixedly connected with the handle rear sleeve; and a retractor assembly, including a hook piece and a retractor tube sleeved in the outer tube, the rear end of the retractor tube extends into the handle front sleeve and is fixed to the front end of the adjustment screw, the front end of the retractor tube is connected to drive the hook piece, and the hook piece penetrates the plug and then extends out of the outer tube. The utility model adjusts the retractor arc by rotating the handle, and can be freely adjusted according to the different organ sizes of patients.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, and in particular to a liver retractor with a telescopic retractor arc adjustment function and a scratch prevention function. Background Art

[0002] In 1980, American doctor Nezhat first began to use video laparoscopic technology for surgery. However, due to technical limitations of the camera and display resolution, the technology was not promoted until the late 1980s in the fields of obstetrics and gynecology and general surgery. With the continuous improvement of laparoscopic equipment, laparoscopic surgery has been widely recognized in the industry for its advantages such as less trauma, fewer complications, and faster recovery, and has become the main surgical technology in the field of surgery.

[0003] Nowadays, the level of minimally invasive surgery is increasing, but it faces the dilemma that the age of surgical patients is getting younger and younger. It is necessary to avoid the impact of wounds on patients' postoperative life, especially on infants and young children. Conventional retractors are difficult to deal with the fragile and delicate livers of infants and young children, and sutures are often used to suspend the liver ligaments and pull the liver during surgery, which can cause liver damage and bleeding due to the cutting of sutures, and even endanger life. For this reason, a liver retractor that can change the curvature of the retractor to deal with different patients, will not cause secondary damage to the liver due to the small contact area, is simple to operate, and fits the concept of minimally invasive surgery is extremely important.

[0004] The existing abdominal retractor has the following problems:

[0005] 1. The contact area between the existing abdominal retractor and the abdominal surface of the liver is small, which can easily cause slippage and excessive local pressure, which can easily cause liver damage, bleeding, and even life-threatening during surgery;

[0006] 2. Most existing retractors have constant specifications, and when encountering livers of different sizes, they cannot achieve satisfactory retraction effects;

[0007] 3. Most existing retractors have complex structures, are difficult to operate, and are slow to learn, which brings inconvenience to clinical use;

[0008] 4. Some abdominal retractors are easy to deform, damage, lose parts, and are difficult to clean and disinfect due to their complex structure;

[0009] 5. Most of the existing abdominal retractors are expensive, which makes them difficult to popularize in primary hospitals. Utility Model Content

[0010] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a liver retractor with a telescopic adjustment of the retractor arc and anti-scratch function, which can be adjusted for different patients, and the slender outer tube can better cooperate with the surgery to reduce the surgical wound. The arc of the retractor can be adjusted by rotating the handle to facilitate the surgery, the anti-slip pattern on the outer surface of the handle can prevent the handle from slipping, the front end of the retractor is provided with an anti-scratch joint, and the outer tube is made of metal to prevent bending, thereby improving the safety of the surgery.

[0011] The purpose of the utility model is achieved through the following technical solutions: the liver retractor with telescopic adjustment of the retractor arc and anti-scratch function comprises:

[0012] The handle assembly is provided with a handle front sleeve, a handle middle sleeve fixedly connected to the handle front sleeve, and a handle rear sleeve rotating relative to the handle middle sleeve in sequence along its axial direction;

[0013] The outer tube has a plug installed at its front end for sealing and a rear end connected to the front connecting sleeve of the handle;

[0014] The adjusting assembly includes an adjusting screw sleeved in the front sleeve of the handle and an adjusting nut sleeved in the middle sleeve of the handle, the rear end of the adjusting screw extends out of the front sleeve of the handle and is threadedly connected to the adjusting nut for transmission, and the adjusting nut is fixedly connected to the rear sleeve of the handle; and

[0015] The hook assembly includes a hook piece and a pull tube sleeved in an outer tube, the rear end of the pull tube extends into the front sleeve of the handle and is fixed to the front end of the adjusting screw, the front end of the pull tube is connected to drive the hook piece, and the hook piece penetrates the plug and extends out of the outer tube;

[0016] When the handle rear sleeve rotates, the adjusting screw is driven to slide axially along the inner wall of the handle front sleeve, and the pull tube slides along the inner wall of the outer tube synchronously with the adjusting screw, thereby adjusting the hook arc formed by the hook piece extending out of the outer tube.

[0017] As a further technical solution, after the plug and the outer tube are positioned by a fixing pin A, the fixing pin A is fixed to the outer tube by welding.

[0018] As a further technical solution, the part of the hook extending out of the plug is arc-shaped and is used to hook organ tissue. The front end of the hook is welded and fixed with an anti-scratch joint, and the rear end of the hook is welded and fixed to the pull tube.

[0019] As a further technical solution, the rear end of the pull tube is inserted into the blind hole at the front end of the adjusting screw and is positioned by a fixing pin B so that the pull tube and the adjusting screw do not rotate relative to each other.

[0020] As a further technical solution, the front end of the handle front sleeve is threadedly connected to an external pipe joint, and the rear end of the external pipe extends into the external pipe joint and is welded and fixed.

[0021] As a further technical solution, a flushing joint is provided on the outer pipe joint, the flushing joint is communicated with the inner cavity of the outer pipe, and a sealing ring is also installed in the outer pipe joint to seal relative to the flushing joint.

[0022] As a further technical solution, a mounting bushing is embedded in the outer pipe joint to fix the sealing ring and limit the axial sliding stroke of the adjusting screw.

[0023] As a further technical solution, a screw sleeve is sleeved on the outer periphery of the adjusting screw, and the screw sleeve is embedded in the front sleeve of the handle and is positioned with the front sleeve of the handle through a fixing pin C.

[0024] As a further technical solution, an external thread is provided at the rear end of the adjusting nut for threaded connection with the rear connecting sleeve of the handle, and the adjusting nut and the rear connecting sleeve of the handle are fixed by a fixing screw.

[0025] As a further technical solution, a flange is provided at the front end of the adjusting nut to cooperate with the step on the inner wall of the connecting sleeve in the handle to achieve position limiting.

[0026] The beneficial effects of the utility model are:

[0027] 1. The adjustment component is used to control the extension and retraction of the hook piece, thereby adjusting the hook arc (length) of the hook piece (retractor) extending out of the outer tube, which can adapt to the different sizes of tissues and organs of patients of different ages;

[0028] 2. The front end of the hook is welded with an anti-scratch joint to effectively prevent damage to the tissue;

[0029] 3. The pull tube and the adjusting screw are positioned by a fixed pin so that they do not rotate relative to each other, ensuring that the hook is stable and reliable when being extended and adjusted;

[0030] 4. The external tube joint is connected to a flushing joint, and the flushing liquid can flow out from the gap between the plug and the hook piece to meet the flushing needs during surgery;

[0031] 5. The flushing joint is sealed relative to the handle through a sealing ring to prevent the flushing liquid from leaking out. At the same time, a bushing is provided to play a buffering role and limit the axial sliding stroke of the adjusting screw;

[0032] 6. The adjusting nut cooperates with the step of the middle sleeve of the handle to prevent the adjusting nut and the middle sleeve of the handle from falling out when the rear sleeve of the handle rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the utility model.

[0034] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0035] Figure 3 for Figure 1 A partial enlarged schematic diagram of area B in the middle.

[0036] Figure 4 It is a structural schematic diagram of the adjustment component in the utility model.

[0037] Explanation of the reference numerals: hook 1, plug 2, fixing pin A3, outer tube 4, pull tube 5, outer tube joint 6, flushing joint 7, sealing ring 8, fixing pin B9, adjusting screw 10, handle front sleeve 11, screw sleeve 12, fixing pin C13, handle middle sleeve 14, adjusting nut 15, fixing screw 16, handle rear sleeve 17, bushing 18, anti-scratch joint 19, external thread 20, flange 21, step 22. DETAILED DESCRIPTION

[0038] The utility model will be described in detail below with reference to the accompanying drawings:

[0039] Example: As attached Figures 1 to 4 As shown, the liver retractor with telescopic adjustment of the retractor arc and anti-scratch function includes a hook piece 1, a plug 2, a fixing pin A3, an outer tube 4, a pull tube 5, an outer tube joint 6, a flushing joint 7, a sealing ring 8, a fixing pin B9, an adjusting screw 10, a handle front sleeve 11, a screw sleeve 12, a fixing pin C13, a handle middle sleeve 14, an adjusting nut 15, a fixing screw 16, a handle rear sleeve 17, a bushing 18, an anti-scratch joint 19, an external thread 20, a flange 21 and a step 22.

[0040] Reference Figure 1 , 3 The front handle sleeve 11 is threadedly connected to the middle handle sleeve 14, and the rear handle sleeve 17 is arranged at the rear end of the middle handle sleeve 14. The two rotate relatively, and the front handle sleeve 11, the middle handle sleeve 14, and the rear handle sleeve 17 constitute a handle assembly.

[0041] like Figure 2 , 3 As shown, a plug 2 is installed at the front end of the outer tube 4 for sealing. After the plug 2 and the outer tube 4 are positioned by a fixing pin A3, the fixing pin A3 is welded and fixed to the outer tube 4. The front end of the handle front sleeve 11 is threadedly connected with an outer tube joint 6, and the rear end of the outer tube 4 extends into the outer tube joint 6 and is welded and fixed. Preferably, a flushing joint 7 is provided on the side of the outer tube joint 6 close to the outer tube 4, and the flushing joint 7 is connected to the inner cavity of the outer tube 4. The flushing liquid can flow out from the gap between the plug 2 and the hook piece 1 to meet the flushing requirements during the operation. A sealing ring 8 is also installed in the outer tube joint 6 to seal the handle part relative to the flushing joint 7 to prevent the flushing liquid from leaking.

[0042] Furthermore, the adjusting screw 10 and the adjusting nut 15 form an adjusting assembly, the adjusting screw 10 is sleeved in the front sleeve 11 of the handle, and the adjusting nut 15 is sleeved in the middle sleeve 14 of the handle. The rear end of the adjusting screw 10 extends out of the front sleeve 11 of the handle and is threadedly connected to the adjusting nut 15 for transmission. The rear end of the adjusting nut 15 is provided with an external thread 20 for threaded connection with the rear sleeve 17 of the handle, and the adjusting nut 15 and the rear sleeve 17 of the handle are fixed by a fixing screw 16 to prevent the two from rotating relative to each other. A screw sleeve 12 is also sleeved on the outer periphery of the adjusting screw 10, and the screw sleeve 12 is embedded in the front sleeve 11 of the handle, and is positioned with the front sleeve 11 of the handle by a fixing pin C13, and the fixing pin C13 plays an anti-rotation role. Preferably, a bushing 18 is embedded and installed in the outer pipe joint 6 to fix the sealing ring 8, and also plays a role in limiting the axial sliding stroke of the adjusting screw 10.

[0043] The hook piece 1 and the pull tube 5 form a pull hook assembly. The pull tube 5 is sleeved in the outer tube 4. The rear end of the pull tube 5 passes through the outer tube joint 6 and extends into the blind hole at the front end of the adjusting screw 10. The pull tube 5 is positioned with the front end of the adjusting screw 10 through the fixing pin B9 so that the pull tube 5 and the adjusting screw 10 do not rotate relative to each other. The front end of the pull tube 5 is welded and fixed to the hook piece 1 (which can drive the hook piece 1 to move synchronously). The hook piece 1 passes through the plug 2 and then extends out of the outer tube 4. Preferably, the part of the hook piece 1 extending out of the plug 2 is in an arc shape, which can hook human organs and tissues. The front end of the hook piece 1 is also welded and fixed with an anti-scratch joint 19, which can effectively prevent damage to tissues.

[0044] Furthermore, when the rear sleeve 17 of the handle rotates, it drives the adjusting screw 10 to slide axially along the inner wall of the front sleeve 11 of the handle, and the pulling tube 5 slides synchronously along the inner wall of the outer tube 4 with the adjusting screw 10, thereby adjusting the curvature of the retractor formed by the hook piece 1 extending out of the outer tube 4. In this embodiment, rotating the rear sleeve 17 of the handle clockwise reduces the curvature of the retractor (hook piece 1), and rotating it counterclockwise increases the curvature of the retractor, which can adapt to the different sizes of tissues and organs of patients of different ages.

[0045] Preferably, a flange 21 is provided at the front end of the adjusting nut 15 to cooperate with a step 22 on the inner wall of the connecting sleeve 14 in the handle to achieve position limiting.

[0046] The working process of the utility model is as follows: during assembly, the rear end of the pull tube 5 is inserted into the middle hole (blind hole) at the front end of the adjusting screw 10, the rear end of the adjusting screw 10 extends into the screw sleeve 12, the adjusting screw 10 enters from the threaded hole at the front end of the handle sleeve 14, and extends to the rear end of the handle sleeve 14 (through the external thread 20 of the adjusting nut 15), and then the adjusting assembly is fixed by inserting the fixing pin C13. The handle sleeve 17 is connected to the external thread 20 extending from the rear end of the handle sleeve 14 through the adjusting nut 15, and the outer tube joint 6 is connected to the front end of the handle sleeve 11 through threads. The outer tube 4 is welded to the outer tube joint 6, the hook piece 1 is welded to the pull tube 5, the hook assembly enters the outer tube 4 from the inner hole at the rear end of the handle sleeve 11 until the hook piece 1 extends out of the outer tube 4, and the rear end of the handle sleeve 11 is connected to the front end of the handle sleeve 14 through threads; the hook piece 1 is welded to the anti-scratch joint 19.

[0047] During surgery, the handle assembly (the handle rear sleeve 17) rotates clockwise to reduce the arc of the hook, and rotates counterclockwise to increase the arc of the hook, which can be adjusted according to the different organ sizes of the patient. The slender outer tube can better cooperate with the surgery to reduce the surgical wound.

[0048] The utility model adjusts the arc shape of the retractor by rotating the handle, which is convenient for surgery. The anti-skid pattern on the outer surface of the handle can prevent the handle from slipping. An anti-scratch joint is arranged at the front end of the retractor. The outer tube is made of metal to prevent bending, thereby improving the safety of surgery.

[0049] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A liver retractor with a telescopic retractor arc anti-scratch function, characterized in that: include: A handle assembly is provided with a handle front sleeve (11), a handle middle sleeve (14) fixedly connected to the handle front sleeve (11), and a handle rear sleeve (17) rotatable relative to the handle middle sleeve (14) in sequence along its axial direction; The outer tube (4) has a plug (2) installed at its front end for sealing, and a rear end connected to a front connecting sleeve (11) of the handle; An adjustment assembly comprises an adjustment screw (10) sleeved in a handle front sleeve (11) and an adjustment nut (15) sleeved in a handle middle sleeve (14), wherein the rear end of the adjustment screw (10) extends out of the handle front sleeve (11) and is threadedly connected to the adjustment nut (15) for transmission, and the adjustment nut (15) is fixedly connected to the handle rear sleeve (17); and The hook assembly comprises a hook piece (1) and a pull tube (5) sleeved in an outer tube (4); the rear end of the pull tube (5) extends into a front sleeve (11) of a handle and is fixed to the front end of an adjusting screw (10); the front end of the pull tube (5) is connected to drive the hook piece (1); the hook piece (1) penetrates the plug (2) and then extends out of the outer tube (4); When the handle rear sleeve (17) rotates, it drives the adjusting screw (10) to slide axially along the inner wall of the handle front sleeve (11), and the pull tube (5) slides synchronously along the inner wall of the outer tube (4) along with the adjusting screw (10), thereby adjusting the hook arc formed by the hook piece (1) extending out of the outer tube (4).

2. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: After the plug (2) and the outer tube (4) are positioned by a fixing pin A (3), the fixing pin A (3) and the outer tube (4) are fixed by welding.

3. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The portion of the hook piece (1) extending out of the plug (2) is in an arc shape and is used to hook organ tissue. An anti-scratch joint (19) is welded and fixed to the front end of the hook piece (1), and the rear end of the hook piece (1) is welded and fixed to the pull tube (5).

4. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The rear end of the pull tube (5) is inserted into the blind hole at the front end of the adjusting screw (10) and is positioned by a fixing pin B (9) so that the pull tube (5) and the adjusting screw (10) do not rotate relative to each other.

5. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The front end of the handle front sleeve (11) is threadedly connected to an external pipe joint (6), and the rear end of the external pipe (4) extends into the external pipe joint (6) and is fixed by welding.

6. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 5, characterized in that: The outer tube joint (6) is provided with a flushing joint (7), which is communicated with the inner cavity of the outer tube (4). A sealing ring (8) is also installed in the outer tube joint (6) to seal relative to the flushing joint (7).

7. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 6, characterized in that: The outer pipe joint (6) has an embedded mounting bushing (18) for fixing the sealing ring (8) and limiting the axial sliding stroke of the adjusting screw (10).

8. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The outer periphery of the adjusting screw (10) is sleeved with a screw sleeve (12), the screw sleeve (12) is embedded in the handle front sleeve (11), and is positioned with the handle front sleeve (11) via a fixing pin C (13).

9. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The rear end of the adjusting nut (15) is provided with an external thread (20) for threaded connection with the handle rear connecting sleeve (17), and the adjusting nut (15) and the handle rear connecting sleeve (17) are fixed by a fixing screw (16).

10. The liver retractor with telescopic adjustment of the retractor arc and anti-scratch function according to claim 1, characterized in that: The front end of the adjusting nut (15) is provided with a flange (21) for cooperating with a step (22) on the inner wall of the connecting sleeve (14) in the handle to achieve position limiting.

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