Arthroscope approach cannula with wings

Abstract

The utility model relates to the field of medical instruments, in particular to a winged arthroscope approach cannula which comprises an inserter and a cannula assembly arranged outside the inserter in a sleeving mode, the cannula assembly comprises an outer cannula body and an inner cannula body, the inserter is sleeved with the inner cannula body, the inner cannula body is sleeved with the outer cannula body, and the inner cannula body is sleeved with the inner cannula body. An outer sleeve wing which can be switched between an unfolded state and a closed state is arranged at one end, inserted into a human body, of the outer sleeve. The method has the effects of improving the operation quality and reducing the operation risk.

Description

Technical Field

[0001] The present application relates to the field of medical instruments, and in particular to an arthroscopic access sleeve with wings. Background Art

[0002] Arthroscopic surgery usually requires the use of a cannula, which can be inserted into the tube of the arthroscope so that surgical instruments can smoothly enter the joint for operation. The cannula can also protect the arthroscope and tissue from damage and control the flow of fluid during surgery to facilitate observation and operation. Cannulas usually come in different sizes and shapes to accommodate joints of different sizes and shapes. Before surgery, the doctor needs to perform imaging examinations such as CT and MRI on the joint to select the most appropriate cannula. The use of cannulas also requires certain skills and requires the doctor to have certain operating experience. During the operation, the doctor needs to accurately insert the cannula into the joint and align it with the lens to ensure clear observation and operation.

[0003] At present, the arthroscopic access cannulas currently used in the clinical field are mainly made of polymer materials such as ABS, PC and medical silicone. There are two common schemes for arthroscopic access cannulas, namely hard cannulas and soft cannulas. Hard cannulas: generally divided into two types: threaded and non-threaded. The threaded hard cannulas have full threads or half threads (threads in some positions) on the cannula body, which prevents the cannula from sliding when the instrument repeatedly enters and exits the cannula during surgery, but may cause secondary damage to the surgical site; the non-threaded hard cannula has a lower risk of secondary injury but weaker anti-slip performance. The soft cannula is made of medical silicone as a whole, which has a lower risk of secondary injury than the hard cannula, but the material has poor stability when fixed flexibly, which increases the risk during surgery. Utility Model Content

[0004] In order to improve surgical quality and reduce surgical risks, the present application provides an arthroscopic access sleeve with wings.

[0005] The present application provides a winged arthroscopic access cannula, which adopts the following technical solution:

[0006] A winged arthroscopic access cannula comprises: an inserter, and a cannula assembly sleeved on the outside of the inserter, the cannula assembly comprising an outer cannula and an inner cannula, the inner cannula is sleeved on the outside of the inserter, the outer cannula is sleeved on the outside of the inner cannula, and an outer cannula wing which can be switched between an expanded state and a closed state is arranged at one end of the outer cannula inserted into the human body.

[0007] By adopting the above technical scheme, the utility model divides the sleeve structure into a double-layer structure of an inner sleeve and an outer sleeve. The outer side of the sleeve is smoothly arranged. Compared with the threaded sleeve, the sleeve structure causes less secondary damage to the human body. After the sleeve is inserted, the inserter is first taken out, and then the inner sleeve is moved to make the outer sleeve wing in an expanded state. After the inner sleeve reaches the position, the movement of the outer sleeve wing can be limited, thereby achieving the fixation of the sleeve position. Compared with other types of sleeves, the fixation is more firm. While ensuring the position stability, the outer sleeve wing is inserted first and then changed from a closed state to an expanded state, which can reduce the secondary damage to the human body caused by the sleeve insertion, improve the quality of the operation, and reduce the risk of the operation.

[0008] Preferably, a first fixing portion is provided on the outer sleeve wing, and a second fixing portion is provided on the inserter corresponding to the outer sleeve wing. The first fixing portion can be slidably locked on the second fixing portion. When the first fixing portion is fixed on the second fixing portion, the outer sleeve wing is in a closed state. When the first fixing portion is separated from the second fixing portion, the outer sleeve wing is in an expanded state.

[0009] By adopting the above technical solution, during the operation, before the cannula assembly is inserted into the human body, the outer cannula wings are in a closed state. At this time, the first fixing part is locked on the second fixing part, so that the outer cannula wings can be kept in a closed state. When the inserter is inserted into the cannula assembly, the outer cannula wings are restricted from unfolding. After the cannula assembly is inserted into the human body, the inserter must be pulled out first, and the outer cannula wings can be switched to an unfolded state by pushing the inner cannula. At this time, the first fixing part slides on the second fixing part to release the locking state of the first fixing part and the second fixing part. After switching to the unfolded state, the inner cannula limits the outer cannula wings and restricts the state of the outer cannula wings.

[0010] Preferably, the first fixing portion includes a first mounting groove and a sliding block, and the second fixing portion is provided with a first fixing groove for the sliding block to slide and limit the position of the sliding block.

[0011] By adopting the above technical solution, when the outer sleeve wing is in a closed state, the first installation groove, the slider and the first fixing groove cooperate to lock the first fixing part and the second fixing part. When the slider slides out of the first fixing groove, the outer sleeve wing can be switched to an expanded state.

[0012] Preferably, at least two outer sleeve wings are symmetrically arranged, and each of the outer sleeve wings can be unfolded 0-90°.

[0013] By adopting the above technical solution, when two outer sleeve wings are provided, when the outer sleeve wings are in a closed state, the outer sleeve wings are arranged along the length direction of the outer sleeve, and when the outer sleeve wings are gradually switched to an expanded state, the outer sleeve wings can have an angle greater than 0° and less than or equal to 90° relative to the closed state, and when the outer sleeve wings have an angle equal to 90° relative to the closed state, the outer sleeve wings are in a fully expanded state, and the expanded state is the final fixed state for use.

[0014] Preferably, the outer sleeve comprises an outer sleeve body, an outer sleeve head and an outer sleeve tail, the outer sleeve body is cylindrical, a first insertion hole for inserting the inner sleeve is opened at the center of the outer sleeve body, and the outer sleeve wing is arranged at the outer sleeve head.

[0015] By adopting the above technical solution, the outer sleeve wing is more suitable for surgical conditions when it is arranged on the outer sleeve head.

[0016] Preferably, a circular groove is designed at the tail end of the outer sleeve, and a rubber pad is embedded in the circular groove, and the rubber pad limits the displacement of the inner sleeve.

[0017] By adopting the above technical solution, when the displacement of the inner sleeve is restricted, the state of the outer sleeve wing can be fixed, and the rubber pad is mainly used to increase friction and limit the position.

[0018] Preferably, the inner sleeve is a funnel structure, a second insertion hole for inserting the inserter is opened at the center of the inner sleeve, a limiting flow tube is arranged at the side of the inner sleeve, a limiting flow tube cap is installed on the limiting flow tube, and the limiting flow tube cap is used to control the outflow of liquid.

[0019] By adopting the above technical solution, the funnel-shaped inner sleeve can be more convenient for guiding the liquid during the operation. When the liquid is discharged, the liquid first enters the flow limiting tube. If the flow limiting tube cap is opened, the outflow of the flow limiting tube cap can be controlled.

[0020] Preferably, a limit baffle is provided on the inner sleeve, and the limit baffle is used to limit the outer sleeve.

[0021] By adopting the above technical solution, the limiting baffle can be attached to one end of the outer sleeve, and the outer sleeve can be limited at this time.

[0022] Preferably, the inserter comprises a handle and an insertion rod, the handle is ellipsoidal and is provided with a plurality of slots.

[0023] By adopting the above technical solution, the ellipsoidal handle can improve the user's grip feel, and the design of multiple grooves can prevent sliding.

[0024] Preferably, positioning marks are provided on the tail of the outer sleeve, the inner sleeve and the inserter.

[0025] By adopting the above technical solution, the positioning mark is used to determine the installation position.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The utility model divides the cannula structure into a double-layer structure of an inner cannula and an outer cannula. The outer side of the cannula is smoothly arranged. Compared with the threaded cannula, the cannula structure causes less secondary damage to the human body. After the cannula is inserted, the inserter is first taken out, and then the inner cannula is moved to make the outer cannula wing in an expanded state. After the inner cannula reaches the position, the movement of the outer cannula wing can be limited, thereby achieving the fixation of the cannula position. Compared with other types of cannula, the fixation is more firm. While ensuring the position stability, the outer cannula wing is inserted first and then changed from a closed state to an expanded state, which can reduce the secondary damage to the human body caused by the cannula insertion, improve the quality of surgery, and reduce the risk of surgery.

[0028] 2. During the operation, before the cannula assembly is inserted into the human body, the outer cannula wings are in a closed state. At this time, the first fixing part is locked on the second fixing part, so that the outer cannula wings can be kept in a closed state. When the inserter is inserted into the cannula assembly, the outer cannula wings are restricted from unfolding. After the cannula assembly is inserted into the human body, the inserter must be pulled out first. The outer cannula wings can be switched to an unfolded state by pushing the inner cannula. At this time, the first fixing part slides on the second fixing part to release the locking state of the first fixing part and the second fixing part. After switching to the unfolded state, the inner cannula limits the outer cannula wings and restricts the state of the outer cannula wings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the winged arthroscopic access cannula in the embodiment of the present application;

[0030] Figure 2 is a schematic diagram of the structure of the inserter in the embodiment of the present application;

[0031] Figure 3 is a schematic diagram of the outer sleeve assembly structure in an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the inner sleeve assembly structure in an embodiment of the present application.

[0033] Explanation of the reference numerals: 1. inserter; 11. handle; 12. insertion rod; 2. sleeve assembly; 21. outer sleeve; 211. outer sleeve body; 212. outer sleeve head; 213. outer sleeve tail; 214. rubber pad; 22. inner sleeve; 221. limit baffle; 23. outer sleeve wing; 231. first fixing part; 232. second fixing part; 24. flow limiting tube; 241. flow limiting tube cap. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The present application embodiment discloses a winged arthroscopic access cannula. Figure 1 The winged arthroscopic access cannula includes an inserter 1 and a cannula assembly 2 sleeved outside the inserter 1. The inserter 1 includes a handle 11 and an insertion rod 12, and the handle 11 is ellipsoidal and has a plurality of slots. The ellipsoidal handle 11 can improve the grip of the user, and the design of the plurality of slots can prevent slipping. In an optional embodiment, a limiter is provided between the handle 11 and the insertion rod 12, and the limiter can be used to limit the position of the cannula assembly 2.

[0037] The cannula assembly 2 includes an outer cannula 21 and an inner cannula 22. The inner cannula 22 is sleeved on the outside of the inserter 1, and the outer cannula 21 is sleeved on the outside of the inner cannula 22. The outer cannula 21 is inserted into the human body and is provided with an outer cannula wing 23 that can be switched to an expanded state and a closed state. After the cannula is inserted, the inserter 1 is first taken out, and then the inner cannula 22 is moved to make the outer cannula wing 23 in an expanded state. After the inner cannula 22 reaches the position, the movement of the outer cannula wing 23 can be limited, thereby achieving the fixing of the cannula position. Compared with other types of cannula, the fixation is more firm. While ensuring the position stability, the outer cannula wing 23 is inserted first and then changed from a closed state to an expanded state, which can reduce the secondary damage to the human body caused by the insertion of the cannula, improve the quality of surgery, and reduce the risk of surgery.

[0038] A first fixing portion 231 is provided on the outer sleeve wing 23, and a second fixing portion 232 is provided at the position of the inserter 1 corresponding to the outer sleeve wing 23. The first fixing portion 231 can be slidably locked on the second fixing portion 232. When the first fixing portion 231 is fixed on the second fixing portion 232, the outer sleeve wing 23 is in a closed state. When the first fixing portion 231 is separated from the second fixing portion 232, the outer sleeve wing 23 is in an expanded state. During the operation, before the cannula assembly 2 is inserted into the human body, the outer cannula wing 23 is in a closed state. At this time, the first fixing portion 231 is locked on the second fixing portion 232, so that the outer cannula wing 23 can be kept in a closed state. After the cannula assembly 2 is inserted into the human body, the inserter 1 is first pulled out, and then the outer cannula wing 23 can be switched to an expanded state by pushing the inner cannula 22. At this time, the first fixing portion 231 slides on the second fixing portion 232 to release the locking state of the first fixing portion 231 and the second fixing portion 232. After switching to the expanded state, the inner cannula 22 limits the outer cannula wing 23 and restricts the state of the outer cannula wing 23.

[0039] In an optional embodiment, the first fixing portion 231 includes a first mounting groove and a slider, and the second fixing portion 232 is provided with a first fixing groove for the slider to slide and limit the slider. When the outer sleeve wing 23 is in a closed state, the first mounting groove, the slider and the first fixing groove cooperate to make the first fixing portion 231 and the second fixing portion 232 in a locked state, and when the slider slides out of the first fixing groove, the outer sleeve wing 23 can be switched to an expanded state. In an optional embodiment, at least two outer sleeve wings 23 are symmetrically arranged, and each outer sleeve wing 23 can be expanded 0-90°. When there are two outer sleeve wings 23, when the outer sleeve wings 23 are in a closed state, the outer sleeve wings 23 are arranged along the length direction of the outer sleeve 21, and when the outer sleeve wings 23 are gradually switched to an expanded state, the outer sleeve wings 23 relative to the closed state can be greater than 0° and less than or equal to 90°. When the outer sleeve wings 23 relative to the closed state The angle is equal to 90°, the outer sleeve wing 23 is in a fully expanded state, and the expanded state is the state of final fixed use.

[0040] In an optional embodiment, the outer sleeve 21 includes an outer sleeve body 211, an outer sleeve head 212 and an outer sleeve tail 213. The outer sleeve body 211 is cylindrical, and a first insertion hole for inserting the inner sleeve 22 is provided at the center of the outer sleeve body 211. The outer sleeve wing 23 is arranged at the outer sleeve head 212. When the outer sleeve wing 23 is arranged at the outer sleeve head 212, it is more suitable for surgical conditions. In a preferred embodiment, the outer sleeve tail 213 is designed with a circular groove, and a rubber pad 214 is embedded in the circular groove, and the rubber pad 214 limits the displacement of the inner sleeve 22. When the displacement of the inner sleeve 22 is limited, the state of the outer sleeve wing 23 can be fixed, and the rubber pad 214 is mainly used to increase friction and limit.

[0041] The inner sleeve 22 is a funnel structure, and a second insertion hole for inserting the inserter 1 is provided at the center of the inner sleeve 22. A flow limiting tube 24 is provided at the side of the inner sleeve 22, and a flow limiting tube cap 241 is installed on the flow limiting tube 24, and the flow limiting tube cap 241 is used to control the outflow of liquid. The funnel shape of the inner sleeve 22 can be more convenient for guiding the liquid during the operation. When the liquid is discharged, the liquid first enters the flow limiting tube 24. If the flow limiting tube cap 241 is opened, the flow limiting tube cap 241 can be controlled to flow out. In a preferred embodiment, a limiting baffle 221 is provided on the inner sleeve 22, and the limiting baffle 221 is used to limit the outer sleeve 21. The limiting baffle 221 can be attached to one end of the outer sleeve 21, and the outer sleeve 21 can be limited at this time.

[0042] In a preferred embodiment, positioning marks are provided on the outer sleeve tail portion 213, the inner sleeve 22, and the inserter 1, and the positioning marks are used to determine the installation position.

[0043] The implementation principle of the embodiment of the present application is: the sleeve structure is divided into a double-layer structure of an inner sleeve 22 and an outer sleeve 21, and the outer side of the sleeve is smoothly arranged. Compared with the threaded sleeve, the sleeve structure causes less secondary damage to the human body. After the sleeve is inserted, the inserter 1 is first taken out, and then the inner sleeve 22 is moved to make the outer sleeve wing 23 in an expanded state. After the inner sleeve 22 reaches the position, the movement of the outer sleeve wing 23 can be limited, thereby achieving the fixation of the sleeve position. Compared with other types of sleeves, the fixation is more firm. While ensuring the position stability, the outer sleeve wing 23 is inserted first and then changed from a closed state to an expanded state, which can reduce the secondary damage to the human body caused by the sleeve insertion, improve the quality of the operation, and reduce the risk of the operation.

[0044] The above description shows the main features, basic principles, and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments or embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A winged arthroscopic access cannula, characterized in that: The invention comprises an inserter (1) and a sleeve assembly (2) sleeved on the outside of the inserter (1), wherein the sleeve assembly (2) comprises an outer sleeve (21) and an inner sleeve (22), wherein the inner sleeve (22) is sleeved on the outside of the inserter (1), and the outer sleeve (21) is sleeved on the outside of the inner sleeve (22), and an outer sleeve (21) wing which can be switched between an expanded state and a closed state is provided at one end of the outer sleeve (21) inserted into the human body.

2. The winged arthroscopic access cannula according to claim 1, characterized in that: A first fixing portion (231) is provided on the wing of the outer sleeve (21), and a second fixing portion (232) is provided on the inserter (1) corresponding to the wing of the outer sleeve (21). The first fixing portion (231) can be slidably locked on the second fixing portion (232). When the first fixing portion (231) is fixed on the second fixing portion (232), the wing of the outer sleeve (21) is in a closed state. When the first fixing portion (231) is separated from the second fixing portion (232), the wing of the outer sleeve (21) is in an expanded state.

3. The winged arthroscopic access cannula according to claim 2, characterized in that: The first fixing portion (231) comprises a first mounting groove and a sliding block, and the second fixing portion (232) is provided with a first fixing groove for the sliding block to slide and to limit the position of the sliding block.

4. The winged arthroscopic access cannula according to claim 2, characterized in that: At least two outer sleeve (21) wings are symmetrically arranged, and each of the outer sleeve (21) wings can be unfolded to 0-90 degrees.

5. The winged arthroscopic access cannula according to claim 1, characterized in that: The outer sleeve (21) comprises an outer sleeve body (211), an outer sleeve head (212) and an outer sleeve tail (213); the outer sleeve body (211) is cylindrical; a first insertion hole for inserting the inner sleeve (22) is provided at the center of the outer sleeve body (211); and the outer sleeve (21) wing is arranged at the outer sleeve head (212).

6. The winged arthroscopic access cannula according to claim 2, characterized in that: The tail portion (213) of the outer sleeve is designed with a circular groove, and a rubber pad (214) is embedded in the circular groove. The rubber pad (214) limits the displacement of the inner sleeve (22).

7. The winged arthroscopic access cannula according to claim 1, characterized in that: The inner sleeve (22) is a funnel structure. A second insertion hole for inserting the inserter (1) is provided at the center of the inner sleeve (22). A flow limiting tube (24) is provided at the side of the inner sleeve (22). A flow limiting tube cap (241) is installed on the flow limiting tube (24). The flow limiting tube cap (241) is used to control the outflow of liquid.

8. The winged arthroscopic access cannula according to claim 7, characterized in that: A limit baffle (221) is provided on the inner sleeve (22), and the limit baffle (221) is used to limit the position of the outer sleeve (21).

9. The winged arthroscopic access cannula according to claim 1, characterized in that: The inserter (1) comprises a handle (11) and an insertion rod (12); the handle (11) is ellipsoidal and is provided with a plurality of slots.

10. The winged arthroscopic access cannula according to claim 6, characterized in that: Positioning marks are provided on the outer sleeve tail (213), the inner sleeve (22) and the inserter (1).

Images