Articular cavity external expansion device for shoulder arthroscopy surgery

Abstract

The invention provides an articular cavity external expansion device for a shoulder arthroscopy operation. The articular cavity external expansion device comprises an outer tube, a rotating knob, an inner tube, a supporting blade, a sealing structure and a drainage pipeline, during use, the outer tube is inserted into an established operation channel of the shoulder joint; the rotary knob is rotated to drive the inner pipe to move upwards, the supporting blades move upwards synchronously, and when the supporting blades move to be right opposite to the long-strip-shaped openings, the supporting blades are unfolded outwards through the long-strip-shaped openings; after the supporting blades are unfolded, the rotary knob continues to be rotated to drive the supporting blades to move upwards and compress surrounding soft tissue, and therefore the operation space in the joint cavity is expanded. During an operation, an operating instrument extends into the outer tube through the sealing structure and enters an articular cavity to perform corresponding operation. According to the articular cavity external expansion device for the shoulder arthroscopy surgery, soft tissue is compressed through the supporting blades, the operation space in an articular cavity can be remarkably expanded, it is ensured that surgical instruments are flexibly operated, the surgical field is not limited, and therefore the articular cavity external expansion device adapts to individual differences of patients with different body types.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a joint cavity expansion device for shoulder arthroscopic surgery. Background Technology

[0002] Arthroscopic surgery is a minimally invasive surgical technique that involves inserting a fiber optic endoscope (arthoscope) with integrated imaging and illumination functions into the joint cavity through a tiny incision on the body surface (usually about 0.5-1 cm). This allows the surgeon to observe the internal structure of the joint under direct vision on a monitor and perform diagnosis and treatment using specialized micro-instruments.

[0003] In shoulder arthroscopic surgery, two main channels are typically established around the shoulder joint: one for observation of the arthroscope and the other for operation of surgical instruments. The arthroscopic cannula is an essential tool for establishing these channels; its function is to maintain channel stability, protect surrounding soft tissues, and guide instrument insertion and removal. However, in actual clinical practice, for obese patients with abundant subcutaneous soft tissue, after the cannula passes through the thick soft tissue to reach the joint cavity, the thick soft tissue, coupled with the patient's post-anesthesia flaccidity and sagging, results in insufficient effective operating space within the joint cavity, hindering the manipulation of arthroscopic instruments.

[0004] Therefore, how to design a joint cavity expansion device for shoulder arthroscopic surgery that can expand the intra-articular space of obese patients to facilitate instrument operation is a technical problem that has not yet been solved in the existing technology. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects in the prior art where, after the cannula enters the body of an obese patient with abundant subcutaneous soft tissue, the abundant soft tissue becomes flaccid and droops after anesthesia, resulting in insufficient space inside the joint cavity, which in turn affects the range of motion of the instrument, interferes with the flexible operation of the instrument, and limits the surgical field. Thus, the present invention provides a joint cavity expansion device for shoulder arthroscopic surgery that can be used to expand the space inside the joint cavity of obese patients to facilitate instrument operation.

[0006] Therefore, the present invention provides a joint cavity expansion device for shoulder arthroscopic surgery, comprising: The outer tube is hollow and open at both ends. The outer wall has spiral protrusions, and at least three long openings are provided on the tube wall near the bottom opening. Rotate the knob; it is hollow and open at both ends, and can be rotatably installed at the top opening of the outer tube. The inner tube is hollow and open at both ends. It is installed inside the outer tube and its top end is fixedly connected to the rotating knob. It can be moved up and down inside the outer tube by the rotating knob. At least three support blades are extendably mounted on the outer wall of the bottom end of the inner tube. In the initial state, the connecting end of the support blade near the inner tube is limited by the inner wall of the outer tube and tightly fits against the tube wall of the inner tube. When the rotating knob is turned to move the inner tube upward, the support blade moves upward synchronously. When the support blade moves to be directly opposite the elongated opening, the limitation of the outer tube on the support blade is released, and the support blade unfolds outward through the elongated opening. A sealing structure, screwed onto the top of the rotating knob, is used to seal the outer tube; the sealing structure allows instruments to be inserted and removed into the outer tube, and the sealing structure can reseal the outer tube after the instruments are removed. A drainage pipe is formed on the outer wall of the outer tube near the top opening and communicates with the inner cavity of the outer tube to allow or prevent the liquid in the outer tube from draining out.

[0007] As a preferred embodiment, it also includes a rubber limiting member, which is screwed onto the outer wall of the outer tube and has an annular extrusion disc formed at the bottom. The bottom surface of the annular extrusion disc is provided with an extrusion plane, which is suitable for pressing against the skin on the outside of the patient's shoulder joint.

[0008] As a preferred embodiment, the support blade is extendably mounted on the outer wall of the bottom end of the inner tube via a mounting structure; The mounting structure includes: There are two pivot seats, which are fixedly installed on the outer wall of the inner tube and have pivot through holes opposite to each other. A connecting block is fixedly disposed at the connecting end of the supporting blade and has a connecting through hole; the connecting block is installed between the two rotating shaft seats; A rotating shaft is inserted through the rotating shaft through hole and the connecting through hole, with both ends extending to the outside of the rotating shaft through hole; An elastic torsion spring is sleeved and installed at both ends of the rotating shaft, with one end abutting against the wall of the inner tube and the other end abutting against the support blade; In the initial state, the inner wall of the outer tube presses against the support blade, the support blade compresses the elastic torsion spring, and the support blade is tightly attached to the wall of the inner tube. When the support blade moves with the inner tube to be directly opposite the elongated opening, the outer tube releases the restriction on the support blade, and the elastic torsion spring pushes the support blade to rotate around the pivot and unfold outward through the elongated opening.

[0009] As a preferred embodiment, the rotary knob is rotatably mounted at the top opening of the outer tube via a rotary mounting structure; The rotating mounting structure includes: The mounting base is hollow and open at both ends, and is fixedly sleeved at the top opening position of the outer tube; The rotating plug, formed at the bottom of the rotating knob, is rotatably installed into the mounting base; A rotation limiting structure is used to rotatably limit the rotating plug on the mounting base, thereby rotatably mounting the rotating knob on the top end of the outer tube.

[0010] As a preferred embodiment, the rotation limiting structure includes: There are two mounting through holes, which are respectively opened on both sides of the mounting base and penetrate the inner cavity of the mounting base. The inner wall of the tail section is provided with a first internal thread. An annular mounting groove is formed on the outer wall of the rotating plug; Two mounting bolts are respectively inserted through the front section of the mounting through hole, then installed into the annular mounting groove, and screwed to the tail end of the mounting through hole, thereby rotatably limiting the rotating plug on the mounting base.

[0011] As a preferred embodiment, the inner wall of the rotary plug is provided with a second internal thread; the outer wall of the top end of the inner tube is provided with an external thread; the inner tube is threadedly connected to the rotary plug, so that when the rotary knob is rotated, the inner tube can be driven to move up and down inside the outer tube.

[0012] As a preferred embodiment, at least two limiting guide grooves are provided on the inner wall of the outer tube; at least two limiting guide sliders are fixedly provided on the outer wall of the inner tube; the limiting guide sliders are matched and installed with the limiting guide grooves, and can move back and forth in the vertical direction along the limiting guide grooves.

[0013] As a preferred embodiment, the top of the mounting base is formed with a first annular groove; the rotating knob is formed with a second annular groove. It also includes a first annular sealing ring, which is fixedly installed between the first annular groove and the second annular groove.

[0014] As a preferred embodiment, the sealing structure includes: A connecting cylinder is formed at the top of the rotating knob; An elastic sealing gasket is fixedly installed on the top of the connecting cylinder, and has an insertion through hole formed in the middle; the insertion through hole is a normally closed insertion hole, which allows the instrument to pass through and can restore the normally closed seal after the instrument is pulled out; A sealing cap is screwed onto the connecting cylinder and presses against the elastic sealing gasket, thus limiting and fixing the elastic sealing gasket; the top wall of the sealing cap is formed with an insertion opening that is vertically opposite to the insertion through hole.

[0015] As a preferred embodiment, a valve seat is formed on the drain pipe, the valve seat has a mounting cavity with a top opening and is connected to the drain pipe; It also includes a rotating valve core, which is rotatably installed into the mounting cavity through the top opening. The top is formed with a valve core handle, and the middle is provided with a drain hole. When it is necessary to drain the liquid in the outer tube, rotate the valve core handle to drive the rotating valve core to rotate, so that the drain hole is connected to the drain pipe, and the liquid is allowed to drain. When it is necessary to prevent the liquid in the outer tube from draining, the valve core handle is rotated to drive the rotating valve core to rotate, so that the drain hole is not connected to the drain pipe, thus preventing the liquid from draining. and / or; A first annular mounting groove is formed on the inner wall of the mounting cavity near the top opening; a second annular mounting groove is formed on the outer wall of the rotating valve core. It also includes a second annular sealing ring, which is fixedly installed between the first annular mounting groove and the second annular mounting groove.

[0016] The technical solution provided by this invention has the following advantages: The arthroscopic joint cavity expansion device for shoulder arthroscopy of the present invention includes an outer tube, a rotating knob, an inner tube, support blades, a sealing structure, and a drainage pipe; wherein, the outer tube is hollow and open at both ends, with a spiral protrusion on the outer wall, and at least three elongated openings on the tube wall near the bottom opening; the rotating knob is hollow and open at both ends, and is rotatably mounted at the top opening of the outer tube; the inner tube is hollow and open at both ends, installed inside the outer tube, with its top end fixedly connected to the rotating knob, and can be moved up and down inside the outer tube by the rotating knob; at least three support blades are extendably mounted on the outer wall of the bottom end of the inner tube; in the initial state, the support blades near the inner opening are... The connecting end of the tube is limited by the inner wall of the outer tube, tightly fitting against the inner tube wall. When the rotating knob moves the inner tube upward, the support blade moves upward synchronously. When the support blade moves to be directly opposite the long opening, the outer tube releases its limitation on the support blade, and the support blade unfolds outward through the long opening. The sealing structure is screwed onto the top of the rotating knob to seal the outer tube. The sealing structure allows instruments to be inserted and removed into the outer tube through the sealing structure, and after the instruments are removed, the sealing structure can reseal the outer tube. The drainage pipe is formed on the outer wall of the outer tube near the top opening and communicates with the inner cavity of the outer tube to allow or prevent the liquid in the outer tube from draining.

[0017] During shoulder arthroscopy, the outer tube is first inserted into the pre-established surgical channel on the shoulder joint skin. By rotating a spiral protrusion on its outer wall, it is pushed to a certain depth, ensuring the elongated opening on the outer tube is fully subcutaneous. Rotating the knob moves the inner tube upwards, simultaneously moving the support blade upwards. When the support blade aligns with the elongated opening, it expands outwards through the opening. After expansion, rotating the knob further moves the support blade upwards, compressing the surrounding soft tissue and thus expanding the operating space within the joint cavity. During surgery, the instruments are inserted into the outer tube through a sealed structure and enter the joint cavity for appropriate procedures. If it is necessary to drain waste fluid or tissue debris from the joint cavity, a negative pressure device can be connected to the free end of the drainage tube for suction cleaning. This shoulder arthroscopy joint cavity expansion device, through the compression of soft tissue by the support blade, significantly expands the operating space within the joint cavity, ensuring flexible instrument operation without limiting the surgical field, thus adapting to individual differences in patients of different body types. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the prior art or specific embodiments of the present invention, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the overall structure of the joint cavity expansion device for shoulder arthroscopic surgery according to the present invention.

[0020] Figure 2 It is Figure 1 A schematic diagram of the structure after the rubber limiting component is removed.

[0021] Figure 3 It is Figure 2 A schematic diagram of the structure supporting the unfolding of the blades.

[0022] Figure 4 yes Figure 3 A schematic diagram of the structure supporting the upward movement of the blades.

[0023] Figure 5 yes Figure 2 A schematic diagram of the explosion structure.

[0024] Figure 6 yes Figure 5 Enlarged structural diagram of part A.

[0025] Figure 7 yes Figure 5 Enlarged structural diagram of section B.

[0026] Figure 8 yes Figure 7 A schematic diagram of the rotating knob.

[0027] Figure 9 yes Figure 5 A magnified schematic diagram of the structure of section C.

[0028] Figure 10 yes Figure 2 A sectional view.

[0029] Figure 11 yes Figure 10 Enlarged structural diagram of section D.

[0030] Reference numerals: 1. Outer tube; 11. Spiral protrusion; 12. Long strip opening; 13. Limiting guide groove; 14. Limiting guide slider; 15. Rubber limiting component; 16. Annular extrusion disc; 17. Extrusion plane; 2. Rotating knob; 21. Mounting base; 22. Rotating plug; 23. Mounting through hole; 24. Annular mounting groove; 25. Mounting bolt; 3. Inner tube; 4. Support blade; 41. Rotary shaft seat; 42. Rotary shaft through hole; 43. Connecting block; 44. Connecting through hole; 45. Rotating shaft; 46. Elastic torsion spring; 5. Drainage pipe; 51. Valve seat; 52. Mounting cavity; 53. Rotating valve core; 54. Valve core handle; 55. Drainage through hole; 56. First annular mounting groove; 57. Second annular mounting groove; 58. Second annular sealing ring; 6. First annular groove; 61. Second annular groove; 62. First annular sealing ring; 7. Connecting cylinder; 71. Elastic sealing gasket; 72. Through hole; 73. Sealing cap; 74. Through opening. Detailed Implementation

[0031] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0032] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0033] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0034] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0035] This embodiment provides a joint cavity dilator for shoulder arthroscopic surgery, such as... Figure 1-4 As shown in Figures 10-11, the device includes: an outer tube 1, a rotating knob 2, an inner tube 3, supporting blades 4, a sealing structure, and a drainage pipe 5; wherein, the outer tube 1 is hollow and open at both ends, with a spiral protrusion 11 on its outer wall, and at least three elongated openings 12 on the tube wall near the bottom opening; the rotating knob 2 is hollow and open at both ends, and is rotatably mounted at the top opening position of the outer tube 1; the inner tube 3 is hollow and open at both ends, installed inside the outer tube 1, with its top end fixedly connected to the rotating knob 2, and can be moved up and down inside the outer tube 1 by the rotating knob 2; there are at least three supporting blades 4, which are extendable and mounted on the outer wall of the bottom end of the inner tube 3; in the initial state, the connecting end of the supporting blade 4 near the inner tube 3 is limited by the inner wall of the outer tube 1, tightly The outer tube 1 adheres to the wall of the inner tube 3; when the rotating knob 2 is turned to move the inner tube 3 upward, the supporting blade 4 moves upward synchronously. When the supporting blade 4 moves to be directly opposite the elongated opening 12, the outer tube 1 releases the restriction on the supporting blade 4, and the supporting blade 4 unfolds outward through the elongated opening 12; a sealing structure is screwed onto the top of the rotating knob 2 to seal the outer tube 1; the sealing structure allows instruments to be inserted and removed into the outer tube 1 through the sealing structure, and after the instruments are removed, the sealing structure can reseal the outer tube 1; a drain pipe 5 is formed on the outer wall of the outer tube 1 near the top opening and communicates with the inner cavity of the outer tube 1 to allow or prevent the liquid in the outer tube 1 from draining.

[0036] During shoulder arthroscopy, the outer tube 1 is first inserted into the pre-established surgical channel on the shoulder joint skin. The outer tube is then screwed in to a certain depth via a spiral protrusion 11 on its outer wall, allowing the elongated opening 12 on the outer tube 1 to fully penetrate the subcutaneous tissue. Rotating the knob 2 moves the inner tube 3 upwards, simultaneously moving the support blade 4 upwards. When the support blade 4 aligns with the elongated opening 12, it unfolds outwards through the opening. After unfolding, rotating the knob 2 continues to move the support blade 4 upwards, compressing the surrounding soft tissue and expanding the operating space within the joint cavity. During the surgery, the instruments are inserted into the outer tube 1 through a sealed structure and enter the joint cavity for appropriate procedures. If it is necessary to drain waste fluid or tissue debris from the joint cavity, a negative pressure device can be connected to the free end of the drainage tube 5 for suction cleaning. The joint cavity expansion device for shoulder arthroscopy in this embodiment can significantly expand the operating space within the joint cavity by compressing soft tissue with supporting blades, ensuring flexible operation of surgical instruments without limiting the surgical field of view, thereby adapting to individual differences of patients with different body types.

[0037] It also includes a rubber limiting member 15, which is screwed onto the outer wall of the outer tube 1. An annular compression disc 16 is formed at the bottom of the annular compression disc 16, and the bottom surface of the annular compression disc 16 is provided with a compression plane 17, which is adapted to press against the skin on the outer side of the patient's shoulder joint. When it is necessary to fix the outer tube 1, the rubber limiting member 15 is rotated, causing the compression plane 17 to press against the skin on the outer side of the shoulder joint. Through the uniform pressure between the compression plane 17 and the skin, and the screwed engagement between the rubber limiting member 15 and the outer tube 1, the outer tube 1 is stably fixed.

[0038] like Figure 5-6As shown, the support blade 4 is extendably mounted on the outer wall of the bottom end of the inner tube 3 via a mounting structure; the mounting structure includes a pivot seat 41, a connecting block 43, a pivot shaft 45, and an elastic torsion spring 46; wherein, there are two pivot seats 41, which are fixedly disposed on the outer wall of the inner tube 3 and have pivot through holes 42 opposite to each other; the connecting block 43 is fixedly disposed at the connecting end of the support blade 4 and has a connecting through hole 44; the connecting block 43 is installed between the two pivot seats 41; the pivot shaft 45 passes through the pivot through hole 42 and the connecting through hole 44, with both ends extending to the outside of the pivot through hole 42 respectively. An elastic torsion spring 46 is sleeved and installed at both ends of the rotating shaft 45, with one end abutting against the wall of the inner tube 3 and the other end abutting against the support blade 4. In the initial state, the inner wall of the outer tube 1 presses against the support blade 4, the support blade 4 compresses the elastic torsion spring 46, and the support blade 4 is tightly attached to the wall of the inner tube 3. When the support blade 4 moves with the inner tube 3 to be directly opposite the elongated opening 12, the restriction of the support blade 4 by the outer tube 1 is released, the elastic torsion spring 46 pushes the support blade 4 to rotate around the rotating shaft 45, and unfolds outward through the elongated opening 12. Limiting caps are fixedly provided at both ends of the rotating shaft 45 to limit and fix the rotating shaft 45 on the rotating shaft seat 41.

[0039] like Figure 5 , 7 As shown in Figure -8, the rotating knob 2 is rotatably mounted on the top opening of the outer tube 1 via a rotating mounting structure. The rotating mounting structure includes a mounting base 21, a rotating plug 22, and a rotating limiting structure. The mounting base 21 is hollow and has openings at both ends, and is fixedly fitted onto the top opening of the outer tube 1. The rotating plug 22 is formed at the bottom of the rotating knob 2 and is rotatably installed into the mounting base 21. The rotating limiting structure is used to rotatably limit the rotating plug 22 on the mounting base 21, thereby rotatably mounting the rotating knob 2 on the top of the outer tube 1.

[0040] The rotation limiting structure includes mounting through holes 23, an annular mounting groove 24, and mounting bolts 25. Two mounting through holes 23 are respectively formed on both sides of the mounting base 21, penetrating the inner cavity of the mounting base 21, and the inner wall of the tail section is provided with a first internal thread. The annular mounting groove 24 is formed on the outer wall of the rotating plug 22. Two mounting bolts 25 are respectively inserted through the front section of the mounting through holes 23 and then into the annular mounting groove 24, and screwed to the tail end of the mounting through holes 23, thereby rotatably limiting the rotating plug 22 on the mounting base 21. Based on the above structure, the rotating knob 2 can be mounted on the top of the outer tube 1 in a rotatable but non-axially movable manner, thereby enabling the inner tube 3 to move up and down inside the outer tube 1 by rotation.

[0041] The inner wall of the rotating plug 22 is provided with a second internal thread; the outer wall of the top end of the inner tube 3 is provided with an external thread; the inner tube 3 is threadedly connected to the rotating plug 22, so that when the rotating knob 2 is rotated, the inner tube 3 can be driven to move up and down inside the outer tube 1.

[0042] like Figure 6 As shown, at least two limiting guide grooves 13 are formed on the inner wall of the outer tube 1; at least two limiting guide sliders 14 are fixedly arranged on the outer wall of the inner tube 3; the limiting guide sliders 14 are matched and installed with the limiting guide grooves 13, and can move back and forth in the vertical direction along the limiting guide grooves 13. The cooperation between the grooves and the sliders limits and guides the movement of the inner tube 3, ensuring the stability and positional accuracy of the inner tube 3 during movement.

[0043] The mounting base 21 has a first annular groove 6 formed on its top; the rotating knob 2 has a second annular groove 61 formed on its top; and it also includes a first annular sealing ring 62, which is fixedly installed between the first annular groove 6 and the second annular groove 61. The first annular sealing ring 62 is used to seal the connection between the mounting base 21 and the rotating knob 2 to prevent liquid from leaking from that location.

[0044] The sealing structure includes a connecting cylinder 7, an elastic sealing gasket 71, and a sealing cap 73. The connecting cylinder 7 is formed at the top of the rotating knob 2. The elastic sealing gasket 71 is fixedly installed on the top of the connecting cylinder 7, with a through hole 72 formed in its center. The through hole 72 is a normally closed insertion hole, allowing the instrument to pass through, and can return to a normally closed seal after the instrument is removed. The sealing cap 73 is screwed onto the connecting cylinder 7 and presses against the elastic sealing gasket 71, limiting and fixing the elastic sealing gasket 71. The top wall of the sealing cap 73 has an insertion opening 74 that is vertically opposite to the through hole 72. During the operation, the instrument sequentially enters the outer tube 1 through the insertion opening 74 and the through hole 72, and then enters the joint cavity. When the instrument is withdrawn, the through hole 72 in the center of the elastic sealing gasket 71 automatically closes, thereby achieving a seal on the outer tube 1.

[0045] like Figure 5 , 9As shown, a valve seat 51 is formed on the drain pipe 5, the valve seat 51 has a mounting cavity 52, the mounting cavity 52 has a top opening and communicates with the drain pipe 5; it also includes a rotating valve core 53, the rotating valve core 53 is rotatably installed into the mounting cavity 52 through the top opening, the top is formed with a valve core handle 54, and a drain through hole 55 is formed through the middle; when it is necessary to drain the liquid in the outer pipe 1, rotating the valve core handle 54 drives the rotating valve core 53 to rotate, so that the drain through hole 55 communicates with the drain pipe 5, at which time the liquid is allowed to drain. Liquid is discharged; when it is necessary to prevent the liquid in the outer tube 1 from being discharged, the valve core handle 54 is rotated to drive the rotating valve core 53 to rotate, so that the drain hole 55 is not connected to the drain pipe 5, thus preventing the liquid from being discharged; a first annular mounting groove 56 is formed on the inner wall of the mounting cavity 52 near the top opening; a second annular mounting groove 57 is formed on the outer wall of the rotating valve core 53; and a second annular sealing ring 58 is also included, which is fixedly installed between the first annular mounting groove 56 and the second annular mounting groove 57. The second annular sealing ring 58 is used to seal the mounting cavity 52 to prevent liquid leakage; at the same time, the second annular sealing ring 58 can increase the friction between itself and the rotating valve core 53, thereby limiting and fixing the rotating valve core 53 and preventing the rotating valve core 53 from coming out of the mounting cavity 52.

[0046] The method of using the joint cavity expansion device for shoulder arthroscopy in this embodiment is as follows: When performing shoulder arthroscopy on a patient, the outer tube 1 is first inserted into the surgical channel already established on the skin of the shoulder joint, and then screwed into a certain depth by the spiral protrusion 11 set on its outer wall, so that the long opening 12 on the outer tube 1 is completely inserted into the subcutaneous tissue; the rubber limiting member 15 is rotated so that the compression plane 17 presses against the skin on the outer side of the shoulder joint, and the compression plane 17 is evenly pressed against the skin, and the screw of the rubber limiting member 15 against the outer tube 1 is used to achieve the desired effect. The outer tube 1 is stably fixed by the joint mechanism. Rotating the knob 2 moves the inner tube 3 upward, and the support blade 4 moves upward synchronously. When the support blade 4 is aligned with the elongated opening 12, the outer tube 1 releases its restriction on the support blade 4. Under the action of the elastic torsion spring 46, the support blade 4 is pushed to rotate around the pivot 45 and unfold outward through the elongated opening 12. After the support blade 4 unfolds, rotating the knob 2 continues to move the support blade 4 upward and compress the surrounding soft tissue, thereby expanding the operating space within the joint cavity. During the operation, the operating instruments are inserted into the outer tube 1 through the insertion opening 74 and the insertion through hole 72 in sequence, and then enter the joint cavity to perform the corresponding operations. If it is necessary to drain the waste fluid and tissue debris from the joint cavity, the free end of the drainage pipe 5 is connected to a negative pressure device. Rotating the valve core handle 54 drives the valve core 53 to rotate, so that the drainage through hole 55 is connected to the drainage pipe 5. At this time, the waste fluid and tissue debris can be sucked out by negative pressure suction.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. An arthroscopic shoulder surgery joint cavity external expansion device, characterized by, The utility model relates to a kind of medical device, including: Outer tube (1), hollow and both ends open arrangement is provided, outer wall is equipped with helical projection (11), at least three long strip openings (12) are opened in the tube wall close to bottom end opening; Rotary knob (2), hollow and both ends open arrangement is rotatably mounted in the top end opening position of outer tube (1); Inner tube (3), hollow and both ends open arrangement is installed in the outer tube (1) inside, top end is fixedly connected with rotary knob (2), can be driven in the outer tube (1) inside by rotary knob (2) up and down movement; Supporting blade (4), at least three, extendably installed on the outer wall of the inner tube (3) bottom end;Initial state, the connecting end of supporting blade (4) close to the inner tube (3) is limited by the inner wall of outer tube (1), closely adheres to the tube wall of inner tube (3);When rotating rotary knob (2) drives inner tube (3) to move upwards, supporting blade (4) is synchronously moved upwards, waits for supporting blade (4) to move to with long strip opening (12) directly opposite, the limiting of outer tube (1) to supporting blade (4) is released, supporting blade (4) is unfolded outward through long strip opening (12); Sealing structure, screw installation is in the top end of rotary knob (2), for sealing outer tube (1);The sealing structure allows instrument to be pluggably inserted into the inner tube (1) through the sealing structure, and after the instrument is pulled out, the sealing structure can reseal the outer tube (1); Drainage pipeline (5), is formed on the outer wall of the outer tube (1) close to the top end opening, with the inner cavity of outer tube (1) is communicated, for allowing or preventing the liquid in the outer tube (1) to drain.

2. The joint space distending device for shoulder arthroscopy according to claim 1, characterized in that: It further includes rubber limiting piece (15), screw installation is on the outer wall of the outer tube (1), bottom is formed with annular extrusion disc (16), the bottom surface of annular extrusion disc (16) is equipped with extrusion plane (17), and the extrusion plane (17) is suitable for pressing the skin outside the shoulder joint of patient.

3. The joint space distending device for shoulder arthroscopy according to claim 1, characterized in that: Supporting blade (4) is extendably installed on the outer wall of the inner tube (3) bottom end by mounting structure; The mounting structure includes: Rotary shaft seat (41), is two, fixedly arranged on the outer wall of the inner tube (3), opposite rotary shaft through-hole (42) is opened; Connecting block (43), fixedly arranged on the connecting end of supporting blade (4), connecting through-hole (44) is opened;Connecting block (43) is installed between two rotary shaft seats (41); Rotary shaft (45), is arranged in the rotary shaft through-hole (42) and the connecting through-hole (44) inside, and two ends respectively extend to the outside of rotary shaft through-hole (42); Elastic torsional spring (46), sleeve installation is in the two ends of rotary shaft (45), one end is abutted with the tube wall of inner tube (3), and the other end is abutted with supporting blade (4); Initial state, the inner wall of outer tube (1) extrudes supporting blade (4), supporting blade (4) compresses elastic torsional spring (46), and supporting blade (4) is closely adhered to the tube wall of inner tube (3); When the support blade (4) moves with the inner tube (3) to be opposite to the long strip opening (12), the outer tube (1) is released from the limit of the support blade (4), the elastic torsion spring (46) pushes the support blade (4) to rotate around the rotating shaft (45) and expand outward through the long strip opening (12).

4. The joint space distending device for shoulder arthroscopy according to claim 1, characterized in that: The rotating knob (2) is rotatably installed at the top opening position of the outer tube (1) through a rotating installation structure. The rotating installation structure comprises: A mounting seat (21) is hollow and open at both ends and is fixedly sleeved at the top opening position of the outer tube (1); A rotating plug (22) is formed at the bottom end of the rotating knob (2) and is rotatably installed into the mounting seat (21); A rotating limiting structure is used for rotatably limiting the rotating plug (22) on the mounting seat (21), so that the rotating knob (2) is rotatably installed at the top end of the outer tube (1).

5. The joint space distending device for shoulder arthroscopy according to claim 4, wherein The rotating limiting structure comprises: Two mounting through holes (23) are respectively arranged on both sides of the mounting seat (21) and penetrate the inner cavity of the mounting seat (21), and a first internal thread is arranged on the inner wall of the tail section; An annular mounting groove (24) is formed on the outer wall of the rotating plug (22); Two mounting bolts (25) are installed into the annular mounting groove (24) after penetrating the front section of the mounting through hole (23) and are screwed with the tail end of the mounting through hole (23), so that the rotating plug (22) is rotatably limited on the mounting seat (21).

6. The joint space distending device for shoulder arthroscopy according to claim 4, wherein: A second internal thread is arranged on the inner wall of the rotating plug (22); an external thread is arranged on the outer wall of the top end of the inner tube (3); and the inner tube (3) is screwed with the rotating plug (22), so that the inner tube (3) can be driven to move up and down in the outer tube (1) when the rotating knob (2) rotates.

7. The joint space distending device for shoulder arthroscopy according to claim 6, wherein: At least two limiting guide sliding grooves (13) are arranged on the inner wall of the outer tube (1); at least two limiting guide sliding blocks (14) are fixedly arranged on the outer wall of the inner tube (3); the limiting guide sliding blocks (14) are matched with the limiting guide sliding grooves (13) and can move back and forth in the up-down direction along the limiting guide sliding grooves (13).

8. The joint space distending device for shoulder arthroscopy according to claim 4, wherein: A first annular groove (6) is formed on the top of the mounting seat (21); and a second annular groove (61) is formed on the rotating knob (2). A first annular sealing ring (62) is fixedly installed between the first annular groove (6) and the second annular groove (61).

9. The joint space distending device for shoulder arthroscopy according to claim 1, wherein The sealing structure comprises: A connecting cylinder (7) is formed at the top end of the rotating knob (2); An elastic sealing gasket (71) is fixedly installed at the top of the connecting cylinder (7) and is formed with a penetrating through hole (72) in the middle; the penetrating through hole (72) is a normally closed jack and can allow the instrument to penetrate and can restore the normally closed sealing after the instrument is pulled out. A sealing cap (73) is screw-mounted on the connecting cylinder (7) and presses the elastic sealing gasket (71) to limit and fix the elastic sealing gasket (71); a through opening (74) is formed on the top wall of the sealing cap (73) and is opposite to the through hole (72) in the up-down direction.

10. The joint space distending device for shoulder arthroscopy according to claim 1, wherein: A valve seat (51) is formed on the liquid discharge pipeline (5), the valve seat (51) has an installation cavity (52), the installation cavity (52) has a top opening and communicates with the liquid discharge pipeline (5); A rotating valve core (53) is further included, the rotating valve core (53) is rotatably installed into the installation cavity (52) through the top opening, a valve core handle (54) is formed on the top of the rotating valve core (53), and a liquid discharge through hole (55) is formed in the middle of the rotating valve core (53); When it is needed to discharge the liquid in the outer tube (1), the valve core handle (54) is rotated to drive the rotating valve core (53) to rotate, so that the liquid discharge through hole (55) communicates with the liquid discharge pipeline (5), and at this time, the liquid is allowed to be discharged; When it is needed to prevent the liquid in the outer tube (1) from being discharged, the valve core handle (54) is rotated to drive the rotating valve core (53) to rotate, so that the liquid discharge through hole (55) does not communicate with the liquid discharge pipeline (5), and at this time, the liquid is prevented from being discharged; And / or; A first annular installation groove (56) is formed on the inner wall of the installation cavity (52) close to the top opening; a second annular installation groove (57) is formed on the outer wall of the rotating valve core (53); A second annular sealing ring (58) is further included, the second annular sealing ring (58) is fixedly installed between the first annular installation groove (56) and the second annular installation groove (57).

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