Tube assembly, tube assembly kit and surgical irrigation suction drainage apparatus

Abstract

This invention relates to a tubing assembly, characterized in that it comprises: a suction tube; an irrigation tube nested within the suction tube; a tube retainer therein, wherein the suction tube and the irrigation tube are secured at their proximal ends; a locking bushing fitted onto the tube retainer and axially limited relative to the tube retainer, having a locking structure on its peripheral wall, the locking structure having a locking protrusion; and an unlocking sleeve fitted onto the locking bushing, having an unlocking hole on its peripheral wall into which the locking protrusion is embedded, wherein a portion of the locking protrusion is radially outwardly protruding from the unlocking hole to the outside of the unlocking sleeve, and the locking protrusion is radially inwardly driven by the unlocking sleeve, causing the portion to move radially inward. The advantages include: the tubing assembly can be detachably inserted into and connected to a surgical irrigation and aspiration drainage device, and can be easily locked and unlocked thereon. This invention also relates to a tubing assembly kit and a surgical irrigation and aspiration drainage device.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a tubing assembly, a tubing assembly kit, and a surgical irrigation and aspiration drainage device. Background Technology

[0002] Currently, almost all surgical procedures require rinsing the surgical area or instruments with sterile saline or sugar water. At the same time, it is almost always necessary to promptly aspirate the bloody fluid or rinsing water produced by the wound to clean the surgical field, make the surgical field clear, and reduce infection.

[0003] Currently, the main methods of irrigation and suction used in surgical procedures in domestic hospitals are as follows. The first is the traditional open irrigation and suction method that has been used for a long time: the nurse opens a sterile saline or glucose solution, pours it into a container, then uses a water balloon to aspirate it and hands it to the doctor, or scoops it out from the container with a small bowl and hands it to the doctor. This irrigation process has the following problems: contamination is very likely to occur during this process because the opening of the sterile saline bottle or bag is easily contaminated; the water container is exposed to the air for a long time (almost throughout the entire operation), which also increases the chance of contamination; both hands and the outside of the container have bacteria, and operating over the water basin does not comply with aseptic principles; in addition, the operation is inconvenient, as the nurse has to fetch water and then pass it after the surgeon requests it, which wastes valuable surgical time. When suction is needed, excess intraoperative fluid is suctioned away with gauze or a suction device (tube). Suction devices (tubes) are generally reusable, that is, after each surgical operation, the nurse cleans the inside of the suction device (tube) with a cleaning strip, cleans the inside and outside, and finally sterilizes it with high temperature and high pressure before reuse. Cleaning the inside of the suction device (tube) is challenging, as it can lead to incomplete cleaning and infection, and also increases the workload of medical staff. Therefore, this open flushing and suction method is both prone to infection and cumbersome and time-consuming.

[0004] The second type is the pressure-adjustable minimally invasive irrigation and aspiration tube, which has appeared on the market in recent years. This product changes the traditional water supply method, combining the irrigation and aspiration lines into a single, thin, curved stainless steel aspiration tube that can be inserted into the surgical wound. The other end of the irrigation line connects to a saline bag, and the other end of the aspiration line connects to a negative pressure aspirator. A simple handle button allows for easy switching between irrigation and aspiration of the surgical wound, making it convenient and shortening surgical time. However, this device has a drawback: the irrigation and aspiration lines share a single thin stainless steel aspiration tube. This means that a small amount of aspirated wound fluid may remain on the inner wall of the shared tube, and during irrigation, it can be flushed back into the surgical wound by the saline solution, potentially causing secondary infection. Additionally, the irrigation line is relatively thick, with a large water volume, and adjustment is not convenient, making it unsuitable for delicate minimally invasive surgeries.

[0005] The third type, which includes several improved irrigation and aspiration devices that have emerged in recent years, features independent irrigation and aspiration tubing, preventing the aspirated fluid from being flushed back into the surgical wound. However, these improved devices do not allow for intraoperative replacement of irrigation and aspiration tubing of different sizes. Some models are reusable, but the crevices in the product structure are difficult to clean, and repeated sterilization may result in incomplete cleaning and sterilization, increasing the risk of cross-infection. Other models are disposable, but the aspiration channel contains an embedded irrigation tube, partially occupying the cross-sectional space of the aspiration channel and making it prone to blockage. Additionally, the irrigation tubing of this model is electrically controlled, requiring specialized equipment, making the equipment complex, operation cumbersome, and inconvenient to store in the operating room, hindering transportation and affecting the product's ease of use.

[0006] The fourth type designs the irrigation tube, suction tube, and needle hub into a single unit, allowing for the replacement of different sizes and models of the unit during the procedure. However, some of these units are connected to the handle via a simple snap-fit ​​structure, which is not secure. When the tube is used to pull or press on the wound tissue during the procedure, the connection is prone to loosening and falling off. In addition, some units are connected to the handle via a threaded connection, requiring a certain amount of time to unscrew or screw the unit in during the procedure. Furthermore, after tightening the curved suction tube, it is necessary to realign the curvature, which is not very convenient or quick. Summary of the Invention

[0007] The purpose of this invention is to provide a tube assembly, a tube assembly kit, and a surgical irrigation and aspiration drainage device that can solve at least one of the aforementioned problems.

[0008] To achieve the above objectives, the present invention provides a tubing assembly for use in surgical irrigation and aspiration drainage instruments. The tubing assembly has a distal end that is further away from the operator during use and a proximal end that is closer to the operator during use. The tubing assembly comprises:

[0009] Suction tube;

[0010] A flushing tube, wherein the flushing tube and the suction tube are nested together;

[0011] A tube holder, in which the suction tube and the flushing tube are secured at their proximal ends;

[0012] A locking bushing, wherein the locking bushing is fitted onto the tube holder and is axially limited relative to the tube holder, and the locking bushing has at least one locking structure on its peripheral wall, the locking structure having a locking protrusion; and

[0013] An unlocking sleeve is fitted onto the locking bushing, and the unlocking sleeve has at least one unlocking hole on its peripheral wall into which the locking protrusion is embedded.

[0014] The locking protrusion has a portion that extends radially outward from the unlocking hole to the outside of the unlocking sleeve, and the locking protrusion can be driven radially inward by the unlocking sleeve, causing the portion of the locking protrusion to move radially inward.

[0015] Beneficial effects include: the tube assembly can be used for detachable insertion and connection to surgical irrigation and aspiration drainage instruments, and can be easily locked and unlocked thereon.

[0016] Advantageously, the locking structure of the locking bushing also has an elastic tab, on which the locking protrusion is disposed, and the elastic tab elastically deforms radially inward when the locking protrusion is driven radially inward by the unlocking sleeve.

[0017] Advantageously, the tube fixing seat has a recess on its outer peripheral surface, and when the locking protrusion is driven radially inward by the unlocking sleeve, the elastic tab deforms radially inward and enters the recess.

[0018] Advantageously, the elastic tab is formed by providing a material gap on the peripheral wall of the locking bushing.

[0019] Advantageously, the locking protrusion can be radially driven inward by the unlocking sleeve through axial movement of the unlocking sleeve relative to the locking bushing.

[0020] Advantageously, the locking protrusion of the locking bushing has an unlocking surface that extends obliquely to the longitudinal axis of the locking bushing, such that when the locking protrusion is driven radially inward by the unlocking sleeve, the edge of the unlocking hole of the unlocking sleeve radially inward presses the locking protrusion.

[0021] Advantageously, the locking protrusion has a locking surface, the angle between the locking surface and the longitudinal axis of the locking bushing being greater than the angle between the unlocking surface and the longitudinal axis of the locking bushing.

[0022] Advantageously, the locking surface extends perpendicular to the longitudinal axis of the locking bushing.

[0023] Advantageously, the locking protrusion can be driven radially inward by the unlocking sleeve, causing the portion of the locking protrusion to move radially inward away from the outside of the unlocking sleeve.

[0024] Advantageously, the locking bushing is axially limited by the proximal stop flange and the distal stop flange of the tube holder, respectively, and the locking bushing has a conical inner surface at its distal end, such that the diameter of the distal inner edge of the locking bushing is smaller than the maximum outer diameter of the distal stop flange.

[0025] The present invention also proposes a tube assembly kit, characterized in that the tube assembly kit comprises at least two tube assemblies according to the invention, wherein the different tube assemblies differ from each other in terms of the length and / or diameter and / or curvature of their suction tubes and / or flushing tubes.

[0026] The present invention also proposes a surgical irrigation and aspiration drainage device, characterized in that the surgical irrigation and aspiration drainage device comprises:

[0027] The pipe assembly according to the invention or the pipe assembly kit according to the invention; and

[0028] The handle has a receiving cavity into which a tube assembly can be detachably inserted, wherein the handle has a locking hole on the peripheral wall defining the receiving cavity, and a portion of the locking protrusion of the locking bushing extending radially outward from the unlocking hole of the unlocking bushing can extend into the locking hole of the handle to lock the tube assembly to the handle.

[0029] Advantageously, when the tube assembly is locked to the handle, the locking surface of the locking protrusion can be stopped in the locking hole of the handle.

[0030] Advantageously, with the tube assembly locked to the handle, pulling the exposed grip section of the unlocking sleeve axially away from the handle allows the portion of the locking protrusion to move radially inward away from the locking hole of the handle, thereby unlocking the tube assembly from the handle.

[0031] Advantageously, the insertion section in the insertion receiving cavity of the unlocking sheath is provided with one of a positioning protrusion and a positioning groove, while the handle is provided with the other of a positioning protrusion and a positioning groove on the inner surface of the peripheral wall defining the receiving cavity, wherein the positioning protrusion is guided in the positioning groove during the insertion of the unlocking sheath into the handle. Attached Figure Description

[0032] The invention will now be explained in more detail with reference to the accompanying drawings and embodiments, but the invention is not limited to the embodiments described in the drawings and detailed below. The drawings are as follows:

[0033] Figure 1a This is a schematic side view of a surgical irrigation and aspiration drainage device according to one embodiment of the present invention;

[0034] Figure 1b yes Figure 1aA schematic side view of a surgical irrigation and aspiration drainage instrument, in which the handle is partially segmented;

[0035] Figure 1c yes Figure 1a A schematic top view of a surgical irrigation and aspiration drainage instrument, in which the handle is partially segmented;

[0036] Figure 1d yes Figure 1b A schematic enlarged view of local area I of the surgical irrigation and aspiration drainage instrument;

[0037] Figure 1e yes Figure 1c A schematic enlarged view of the local area II of the surgical irrigation and aspiration drainage instrument;

[0038] Figure 1f yes Figure 1c A schematic enlarged view of local area III of the surgical irrigation and aspiration drainage instrument;

[0039] Figure 2a yes Figure 1a A schematic diagram of the tubing assembly of a surgical irrigation and aspiration drainage instrument.

[0040] Figure 2b yes Figure 2a A schematic diagram of the tube assembly, which is partially segmented at the proximal end;

[0041] Figure 2c yes Figure 2b A schematic enlarged view of a portion of the IV of the tube assembly in the diagram;

[0042] Figure 3a yes Figure 2a A schematic perspective view of the tube mounting bracket of the tube assembly in the diagram;

[0043] Figure 3b yes Figure 3a A schematic side view of the tube fixing seat in the middle;

[0044] Figure 3c yes Figure 3b A schematic cross-sectional view of the pipe fixing seat at section line AA;

[0045] Figure 3d yes Figure 3b A schematic longitudinal sectional view of the tube fixing seat in the middle;

[0046] Figure 3e yes Figure 3d A schematic enlarged view of the tube fixing seat at point V;

[0047] Figure 4 This is a schematic diagram of the tube fixing seat and the locking bushing installed on it;

[0048] Figure 5a yes Figure 4 A schematic perspective view of the locking bushing in the middle;

[0049] Figure 5b yes Figure 5a A schematic side view of the locking bushing in the middle;

[0050] Figure 5c yes Figure 5b A schematic longitudinal sectional view of the locking bushing in the middle;

[0051] Figure 5d yes Figure 5a Another schematic side view of the locking bushing, which is partially segmented;

[0052] Figure 5e yes Figure 5d A schematic cross-sectional view of the locking bushing at section line BB;

[0053] Figure 5f yes Figure 5d A schematic end view of the locking bushing from the left side;

[0054] Figure 5g yes Figure 5d A schematic enlarged view of the locking bushing at point VI;

[0055] Figure 6 This is an installation diagram of the tube fixing seat, locking bushing, and unlocking sleeve;

[0056] Figure 7 This is an installation diagram of the locking bushing and the unlocking sleeve;

[0057] Figure 8a yes Figure 7 A schematic perspective view of the locking bushing in the middle;

[0058] Figure 8b yes Figure 8a Another schematic perspective view of the locking bushing in the middle;

[0059] Figure 8c yes Figure 8a A schematic side view of the locking bushing in the middle;

[0060] Figure 8d yes Figure 8c A schematic longitudinal sectional view of the locking bushing in the middle;

[0061] Figure 8e yes Figure 8a Another schematic side view of the locking bushing;

[0062] Figure 9aThis is a schematic perspective view of the handle of the surgical irrigation and aspiration drainage instrument in Figure 1;

[0063] Figure 9b yes Figure 9a A schematic perspective view of the handle in the image, with the cover removed;

[0064] Figure 9c yes Figure 9b A schematic top view of the handle in the middle;

[0065] Figure 9d yes Figure 9b A schematic longitudinal sectional view of the handle in the middle;

[0066] Figure 9e yes Figure 9b A schematic longitudinal sectional view of the handle, showing the two-way bend connector, flushing hose, and two-way straight connector;

[0067] Figure 10a This is a three-dimensional view of the water control device of the surgical irrigation and aspiration drainage instrument in Figure 1;

[0068] Figure 10b yes Figure 10a A side view of the water control device in the middle;

[0069] Figure 10c yes Figure 10a Another view of the water control device in the middle;

[0070] Figure 11a yes Figure 10a A 3D view of the buttons on the water control device;

[0071] Figure 11b yes Figure 11a A side view of the button in the image;

[0072] Figure 11c yes Figure 11a The other side view of the button;

[0073] Figure 12a yes Figure 10a A perspective view of the base of the water control device in the middle;

[0074] Figure 12b yes Figure 12a A side view of the base;

[0075] Figure 12c yes Figure 12a Another view of the base;

[0076] Figure 13a This is a side view of the suction tube of the surgical irrigation and aspiration drainage instrument in Figure 1, which is split at the distal end; and

[0077] Figure 13b yes Figure 13a Enlarged view of the suction tube at point VII. Detailed Implementation

[0078] The following describes an illustrative embodiment of the surgical irrigation and aspiration drainage device 1 and its tubing assembly 2 of the present invention. In this specification, various systems, structures, and devices are schematically depicted in the accompanying drawings for illustrative purposes only, and not all features of actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid unnecessary detail that could obscure the invention. It should be understood that in any practical application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and system-related and industry-related limitations need to be followed. These specific goals may vary depending on the practical application. Furthermore, it should be understood that while such implementation decisions are complex and time-consuming, they are routine tasks for those skilled in the art who will benefit from the present invention.

[0079] The terms and phrases used herein should be understood and interpreted in accordance with the understanding of those skilled in the art. The consistent use of terms or phrases herein is not intended to imply a specific definition, i.e., a definition different from the common and conventional meaning understood by those skilled in the art. For terms or phrases intended to have a specific meaning, i.e., a meaning different from that understood by those skilled in the art, such specific definition will be explicitly listed in the specification, giving the specific definition of the term or phrase directly and unambiguously.

[0080] Unless otherwise required by the content, throughout the following description, the word “including” and its variations, such as “comprising” and “having”, will be interpreted in an open-ended, inclusive sense, that is, as “including but not limited to”.

[0081] Figures 1a to 1c The surgical irrigation and aspiration drainage device 1 according to one embodiment of the present invention is illustrated by way of different views. The surgical irrigation and aspiration drainage device 1 can be used for irrigation and aspiration (or drainage of irrigation and aspiration operations) during neurosurgical craniocerebral, spinal cord and spinal surgery, otolaryngology, orthopedics, head and neck and other specialized microsurgical procedures. It can also be used for irrigation and aspiration during endoscopic surgery and various deep tissue structure surgeries, as well as for irrigation and aspiration of surgical wounds rich in small blood vessels and nerves, so as to ensure a clear and clean surgical field in minimally invasive surgery.

[0082] The surgical irrigation and aspiration drainage device 1 may have a distal end that is further away from the operator during surgery and a proximal end that is closer to the operator. The operator may be a physician or other personnel who operate the irrigation and aspiration drainage device 1 during surgery.

[0083] See Figure 1a and Figure 2a The irrigation and suction drainage instrument 1 may have a tube assembly 2 at its distal end, which can be detachably fixed to the handle 33 so that it can be replaced with other specifications of tube assembly 2 during the operation. The different specifications of tube assembly 2 can be mainly reflected in the diameter, length, and curvature of the suction tube 3 and irrigation tube 4, which will be described below.

[0084] See Figure 1a , Figure 2a , Figure 13a and Figure 13b The tube assembly 2 may include a suction tube 3, which, during surgery, can be inserted into the wound at its distal end to suction out waste. The suction tube 3 may be made of a metallic material, such as medical-grade stainless steel, and may have both flexibility and rigidity to allow it to be bent into the desired shape during surgery. The suction tube 3 may have a cylindrical tubular shape, and its distal end may have an inwardly rolled opening or inwardly rolled edge 5 (see...). Figure 13b This is to prevent it from cutting the body's weak tissues during surgery.

[0085] See 1a and Figure 2a The tube assembly 2 may include an irrigation tube 4, which, during surgery, can be positioned near or inserted into the wound at its distal end to irrigate the wound. The irrigation tube 4 may be made of a metallic material, such as medical-grade stainless steel, and may have both flexibility and rigidity to allow for easy bending into desired shapes during surgery. The irrigation tube 4 may have a cylindrical tubular shape, and its distal end may have a rounded opening (not shown) to prevent it from cutting thin tissues during surgery. The diameter of the irrigation tube 4 may be larger than the diameter of the suction tube 3, thereby allowing the irrigation tube 4 to be fitted, for example, coaxially and radially spaced outside the suction tube 3, forming a radial gap 6 (see...). Figure 2c Therefore, the irrigation tube 4 and the suction tube 3 can form a tube-and-tube structure, achieving a compact integration while remaining independently separate. Irrigation fluid, such as sterile saline or glucose solution, can flow through the radial gap 6 between the irrigation tube 4 and the suction tube 3 and exit from the distal opening of the irrigation tube 4. The irrigation tube 4 can be arranged with its distal opening offset backward or proximally relative to the distal opening of the suction tube 3, thereby allowing the irrigation fluid to flow out in a jet-like manner from the distal opening of the irrigation tube 4 and be guided towards the wound along the periphery of the exposed portion of the suction tube 3. This effectively prevents the irrigation fluid from being aspirated back by the suction tube 3.

[0086] See Figure 2c , Figures 3a to 3eThe tube assembly 2 may also have a hollow, one-piece tube holder 7, which is integrally molded, for example, by injection molding. The tube holder 7 is used not only to fix the suction tube 3, but also to fix the flushing tube 4. For this purpose, the tube holder 7 may have a proximal suction tube holder section 8 for fixing the suction tube 3 and a distal flushing tube holder section 9 for fixing the flushing tube 4.

[0087] See Figure 2c The suction tube fixing section 8 may have a multi-step structure centered on its inner surface, which surrounds a cylindrical suction tube fixing space with different diameters for the suction tube 3. The suction tube 3 may pass through the suction tube fixing space of the suction tube fixing section 8 with its proximal end and be fixed in the suction tube fixing space by means of an adhesive (e.g., AB glue).

[0088] Therefore, the suction tube fixing space can successively include, from proximal to distal end: a truncated cone-shaped flared opening 10; a first cylindrical space 11 adjacent to the flared opening 10; a second cylindrical space 12 adjacent to the first cylindrical space 11 and with a diameter smaller than it; and a third cylindrical space 13 adjacent to the second cylindrical space 12 and with a diameter smaller than it. The outer diameter of the suction tube 3 can be slightly smaller than the diameter of the second cylindrical space 12 and the diameter of the third cylindrical space 13. See also... Figure 2c The suction tube 3 can be inserted through the second cylindrical space 12 and the third cylindrical space 13.

[0089] An adhesive reservoir 14 is formed between the outer surface of the suction tube 3 and the inner surface of the suction tube fixing section 8 that defines the first cylindrical space 11. Adhesive can be easily injected into the adhesive reservoir 14 through the flared end 10, for example, when the suction tube fixing section 8 is placed vertically upward, so as to glue the suction tube 3 and the suction tube fixing section 8 together. The second cylindrical space 12 is mainly responsible for radially constraining the suction tube 3 when it is installed.

[0090] The third cylindrical space 13 can be axially limited by the suction tube step 15 specially designed therein (see...). Figure 3e The suction tube 3 is surrounded by a step 15. Here, the axial positioning step 15 can be used to define the axial position of the suction tube 3; for this purpose, see [reference needed]. Figure 13aA surface structure 16, such as knurling or textured, can be provided on the proximal outer circumferential surface of the suction tube 3 to cooperate with the axial limiting step 15 of the suction tube. This surface structure 16 protrudes radially outward from the outer circumferential surface of the suction tube 3. The surface structure 16 can increase the frictional force in case of potential displacement or rotation, and increase the connection between the suction tube 3 and the suction tube fixing seat section 8. This surface structure 16 is provided on the entire annular outer circumferential surface of the suction tube 3. The outer diameter of the surface structure 16 is designed to be smaller than the diameter of the second cylindrical space 12, but larger than the diameter of the third cylindrical space 13, so that, for example, when the suction tube 3 is inserted from top to bottom into the suction tube fixing space of the suction tube fixing seat section 8 with the suction tube fixing seat section 8 placed vertically upward, the suction tube 3 can be stopped by its surface structure 16 against the step surface of the axial limiting step 15 of the suction tube. Figure 3e (The middle section is on the left side of the step). This facilitates the subsequent injection of adhesive into the space where the suction tube is fixed.

[0091] To facilitate understanding of the relative dimensions mentioned above, the following example is provided: Assuming the outer diameter of the suction tube 3 is 3mm, the diameter of the first cylindrical space 11 can be set to 3.8mm, the diameter of the second cylindrical space 12 can be set to 3.3mm, the diameter of the surface structure 16 can be set to 3.2mm, and the diameter of the third cylindrical space 13 can be set to 3.1mm or 3.05mm. This ensures that the portion of the suction tube without the surface structure 16 can pass through, but the surface structure 16 cannot pass through. It should be understood that the above dimensions are merely illustrative and not restrictive.

[0092] See Figure 2c On the distal side of the suction tube holder section 8, the tube holder 7 may have a liquid inlet section 19, which allows flushing fluid to enter the liquid inlet space 20 formed by the inner surface of the liquid inlet section 19 and the outer surface of the suction tube 3 from the outside of the tube holder 7. For this purpose, the liquid inlet section 19 has a radially extending liquid inlet hole 21 immediately following the axial limiting step 15 of the suction tube, through which flushing fluid can enter the liquid inlet space 20 inside the tube holder 7 from the outside of the tube holder 7 via the liquid inlet hole 21. Two radially opposed liquid inlets 21 are shown here, but other numbers and arrangements of liquid inlets 21 are also conceivable. Here, the liquid inlets 21 are elliptical, but other shapes such as circular and square are also conceivable. Furthermore, the tube holder 7 has an annularly extending guide groove 22 on its outer periphery, which extends through and intersects the liquid inlet hole 21, allowing flushing fluid to be guided to the liquid inlet hole 21 and enter the liquid inlet space 20 from the liquid inlet hole 21.

[0093] Based on the presence of the inlet hole 21 (whose diameter is typically small), the combined use of the surface structure 16 of the suction tube 3 and the axial limiting step 15 of the suction tube fixing section 8, in addition to providing the aforementioned axial limiting function for the suction tube 3, also achieves the following unexpected technical effects: On the one hand, the axial limiting step 15 can block liquid glue from flowing from the glue container 14 through the second cylindrical space 12 to the inlet hole 21 on the tube fixing seat 7; on the other hand, the axial limiting step 15 can axially stop the suction tube 3 via the surface structure 16 to prevent the surface of the suction tube 3 containing glue from approaching the inlet hole 21 during assembly. Both of these aspects help to avoid the inlet hole 21 being undesirably blocked by glue, thus affecting the entry of the rinsing fluid. This has been proven to be very advantageous in practice, solving the problem that the inlet hole 21 is easily blocked by glue during assembly, thereby ensuring the rinsing function.

[0094] See Figure 2c The pipe fixing seat 7 may be provided with sealing rings 17 and 30 on its outer peripheral surface near and far from the liquid inlet 21, respectively. Each sealing ring 17 and 30 may be pre-installed as part of the pipe assembly 2 to facilitate replacement of the entire pipe assembly 2.

[0095] See Figure 2a The flushing tube fixing section 9 can be located on the far side of the liquid inlet section 19, and can have a multi-step structure centered on its inner surface, which surrounds a cylindrical flushing tube fixing space with different diameters for the flushing tube 4. The flushing tube 4 can be inserted into the flushing tube fixing space of the flushing tube fixing section 9 at its proximal end and fixed in the flushing tube fixing space by means of an adhesive (e.g., AB glue).

[0096] For this reason, see Figure 3d The flushing tube fixing space, from distal to proximal, may successively include: a truncated conical flared opening 24; a first cylindrical space 25 adjacent to the flared opening 24; and a second cylindrical space 26 adjacent to the first cylindrical space 25 and having a smaller diameter. The outer diameter of the flushing tube 4 may be slightly smaller than the diameter of the second cylindrical space 26. See also... Figure 2c The flushing tube 4 can be inserted into the first cylindrical space 25 and the second cylindrical space 26.

[0097] An adhesive reservoir 27 is formed between the outer surface of the flushing pipe 4 and the inner surface of the flushing pipe mounting section 9 that defines the first cylindrical space 25. Adhesive can be easily injected into the adhesive reservoir 27 through the flared opening 24, for example, when the flushing pipe mounting section 9 is placed vertically upward, so as to glue the flushing pipe 4 and the flushing pipe mounting section 9 together. The second cylindrical space 26 is mainly responsible for radially constraining the flushing pipe 4 during installation.

[0098] Here, the second cylindrical space 26 of the flushing tube fixing section 9 can be directly adjacent to the aforementioned liquid inlet space 20, and the diameter of the former is larger than that of the latter, so a stepped surface can be formed at the transition between the two. The outer diameter of the flushing tube 4 is larger than the diameter of the liquid inlet space 20, or the outer diameter of the surface structure 16, such as knurling or texture, provided on the proximal outer circumferential surface of the flushing tube 4 is larger than the diameter of the liquid inlet space 20, so that the aforementioned stepped surface can form the stepped surface of the flushing tube axial limiting step 28 for axially limiting the flushing tube 4. The surface structure 16 can increase the frictional force in case of potential displacement or rotation, and increase the connection firmness between the flushing tube 4 and the flushing tube fixing section 9. When the flushing tube fixing section 9 is placed vertically upward and the flushing tube 4 is inserted from top to bottom into the flushing tube fixing space of the flushing tube fixing section 9, the flushing tube 4 can at least partially abut against the stepped surface of the flushing tube axial limiting step 28 with its proximal end face. Figure 2c and 3d (The middle section is on the right side of the step). This facilitates the subsequent adhesive injection process into the fixed space of the flushing pipe.

[0099] Depend on Figure 2c As can be seen, the inlet space 20 is in direct fluid communication with the radial gap 6 between the suction tube 3 and the flushing tube 4, so that the flushing fluid entering the inlet space 20 can directly enter the radial gap 6 between the two tubes 3 and 4 and flow out from the distal port of the flushing tube 4 along the radial gap 6.

[0100] See Figure 2c and Figure 3a The tube retainer 7 has a recess 100 on its outer peripheral surface distal to the sealing ring 30, which is configured to circumferentially surround the seal and have an arc shape in longitudinal section. The recess 100 is configured to receive the elastically bent elastic tab 203 of the locking bushing 200, which will be described below. The tube retainer 7 has a proximal stop flange 101 proximal to the recess 100 and a limiting step 102 adjacent thereto on its distal side. The tube retainer 7 has a distal stop flange 103 distal to the recess 100.

[0101] See Figure 4 The tube assembly 2 has a locking bushing 200 that is mounted, specifically fitted from the distal end to the proximal end, onto the tube holder 7. This locking bushing 200 is used to lock the tube assembly 2 onto the handle 33. The locking bushing 200 may be made of plastic. The locking bushing 200 has an overall cylindrical shape and fits snugly against the tube holder 7. Specifically, the locking bushing 200 can stop at the proximal stop flange 101 of the tube holder 7 with its proximal end face and at the distal stop flange 103 of the tube holder 7 with its distal end face, thus covering the recess 100 of the tube holder 7. See also Figure 5d and Figure 5g The locking bushing 200 has a conical inner surface 212 at its distal end, and its inner diameter tapers distally until it is smaller than the outer diameter of the distal stop flange 103. This allows the locking bushing 200 to pass over the distal stop flange 103 due to the elastic deformation of the plastic material of the locking bushing 200 when it is fitted onto the tube holder 7 from the distal end to the proximal end. After passing over, it can return radially inward, so that the distal inner edge 211 of the locking bushing 200 can axially stop on the distal stop flange 103. The locking bushing 200 does not necessarily stop tightly on both sides simultaneously between the proximal stop flange 101 and the distal stop flange 103, but allows for an axial clearance, thereby allowing slight axial movement of the locking bushing 200 on the tube holder 7, as long as it does not impair its functionality. The locking bushing 200 has a limiting groove 202 on its proximal inner side. When the locking bushing 200 is fitted onto the pipe fixing seat 7, the limiting step 102 of the pipe fixing seat 7 is inserted into the limiting groove 202 of the locking bushing 200, thus preventing the locking bushing 200 from rotating circumferentially relative to the pipe fixing seat 7.

[0102] See Figure 5a and Figure 5b The locking bushing 200 has a locking structure on its peripheral wall, which includes a resilient tab 203 and a locking protrusion 204 disposed substantially centrally on the resilient tab 203. The resilient tab 203 can extend axially in the locking bushing 200 and can be formed by a portion of its own peripheral wall, i.e., by providing material gaps 205 on both circumferential sides of the resilient tab 203. The resilient tab 203 has narrowing portions 209 at both axial ends, which allows for easy elastic deformation of the resilient tab 203 in the radial direction. The locking protrusion 204 extends radially outward from the resilient tab 203 and has a longitudinal section of a substantially right-angled triangle shape. Therefore, the locking protrusion 204 has a distal locking surface 206 that extends substantially perpendicular to the resilient tab 203. The locking protrusion 204 has a proximal unlocking surface 207 that extends obliquely to the resilient tab 203. When the elastic tab 203 is pressed radially inward through the unlocking surface 207, the elastic tab 203 can elastically deform radially inward and enter the recess 100 of the tube holder 7. Here, the recess 100 of the tube holder 7 can be configured in other forms, as long as the recess 100 is inside the elastic tab 203 and allows the elastic tab 203 to deform radially inward to achieve the unlocking of the tube assembly 2 from the handle 33, which will be described later. The locking protrusion 204 has a recess 208 at its unlocking surface 207, which reduces the contact area between the unlocking surface 207 and the unlocking sleeve 300, which will be described later, facilitating the sliding unlocking of the unlocking sleeve 300.

[0103] In this embodiment, the locking bushing 200 has two locking structures opposite each other on its peripheral wall. In other embodiments, one locking structure or three or more circumferentially arranged locking structures may be provided.

[0104] See Figure 6 and Figure 7 The tube assembly 2 has an unlocking sleeve 300 mounted, specifically extending from the proximal side to the distal side, on the locking bushing 200. This unlocking sleeve 300 is used to unlock the tube assembly 2 from the handle 33. The unlocking sleeve 300 may be made of plastic. The unlocking sleeve 300 has an insertion section 301 that inserts into the handle 33 in the installed state and a gripping section 302 exposed outside the handle for operation and holding. The insertion section 301 has a positioning protrusion 303 that, when the unlocking sleeve 300 is inserted into the handle 33, inserts into a positioning groove 70 of the mating handle 33 (see [link to relevant documentation]). Figure 1d The insertion section 301 has an unlocking hole 306 that engages with the locking structure of the locking bushing 200. The unlocking hole 306 is configured as a rectangular through-hole passing through the peripheral wall of the unlocking bushing 300. See also the installed state. Figure 6 The locking protrusion 204 of the locking structure is inserted into the unlocking hole 306 and extends radially outward from the center. The gripping section 302 has a structure on its outer periphery that enhances gripping friction, which is a rib 304 (or a groove, etc., not shown). The gripping section 302 also has a direction indicator 305 on its outer periphery to indicate to the operator the direction of insertion and removal of the gripping section 302. Here, when the gripping section 302 pulls the unlocking sleeve 300 distally relative to the locking bushing 200, the unlocking hole 306 of the unlocking sleeve 300 can radially inwardly press the unlocking surface 207 of the locking protrusion 204, causing the elastic tab 203 to bend radially inwardly, thereby driving the locking protrusion 204 to move radially inward relative to the unlocking hole 306.

[0105] See Figures 9a to 9e The irrigation and aspiration drainage device 1 may have a handle 33 for the operator to hold during surgery. The handle 33 may be made of plastic to reduce costs. The handle 33 may have a streamlined finger-pinching surface to meet ergonomic requirements and increase grip comfort. The handle 33 may have localized soft rubber structures to increase grip resistance.

[0106] See Figure 9d The handle 33 may have a cylindrical receiving cavity 35 at its distal end, the receiving cavity 35 having a proximal receiving cavity section 35.1 and an adjacent distal receiving cavity section 35.2. A stepped surface 38 is formed between the two. The aforementioned positioning groove 70 may be provided in the distal receiving cavity section 35.2.

[0107] See Figure 1d and Figure 1e When tube assembly 2 is inserted into handle 33, the two sealing rings 17 and 30 sealably abut against the inner surface of the proximal receiving cavity section 35.1. The distal sealing ring 30 isolates the flushing fluid from the distal receiving cavity section 35.2 to prevent flushing fluid from overflowing into the distal receiving cavity section 35.2 and the external environment. The proximal sealing ring 17 seals the flushing fluid relative to the cavity 37 of the suction branch 36 (described below) to prevent flushing fluid from overflowing into the suction branch 36.

[0108] See Figure 1d , Figure 1e and Figure 9d The unlocking sleeve 300 is inserted into the distal receiving cavity section 35.2 with its insertion section 301, and the proximal stop flange 101 of the tube holder 7 and the unlocking sleeve 300 are flush with each other with their proximal sides and stop on the stepped surface 38. The handle 33 has a locking hole 71 on its peripheral wall surrounding the distal receiving cavity section 35.2. The locking hole 71 overlaps with the unlocking hole 306 of the unlocking sleeve 300 in the installed state, such that the locking protrusion 204 of the locking bushing 200 passes through the unlocking hole 306 and enters the locking hole 71, and its locking surface 206 axially abuts against the distal side 72 of the locking hole 71. Therefore, the locking protrusion 204 locks the entire tube assembly 2 onto the handle 33. The locking hole 71 is configured as a rectangular through hole. In other embodiments, the locking hole 71 may be configured as a blind hole that opens only radially inward.

[0109] The following is combined Figure 1d and Figure 1e The process of inserting and locking the tube assembly 2 into the handle 33 and unlocking and pulling it out is further described.

[0110] In the insertion and locking step of the tube assembly 2 into the handle 33, the gripping section 302 of the unlocking sleeve 300 is held by hand, aligning the positioning protrusion 303 on the unlocking sleeve 300 with the positioning groove 70 in the handle 33. Then, the tube assembly 2 is pushed into the receiving cavity 35 of the handle 33 until the locking protrusion 204 of the locking bushing 200 enters and locks into the locking hole 71 of the handle 33. During insertion, the locking protrusion 204 first contacts the inner wall of the receiving cavity 35 and is radially pressed inward, while the elastic tab 203 elastically deforms radially inward, so that the locking protrusion 204 can move axially within the receiving cavity 35 to reach the locking hole 71. After the locking protrusion 204 reaches the locking hole 71, the locking protrusion 204 then enters the locking hole 71 radially outward based on the elastic return of the elastic tab 203, and abuts against the distal side 72 of the locking hole 71, at which point it enters the locked state.

[0111] In the locked state of the tube assembly 2, when the tube assembly 2 is pulled outward or laterally shaken, for example by grasping the suction tube 3 and the flushing tube 4, the tube assembly 2 is well axially fixed without loosening from the handle 33, based on the locking bushing 200, which on the one hand stops the tube fixing seat 7 axially towards the proximal side of the proximal stop flange 101 with its proximal end, and on the other hand stops the locking protrusion 204 with the locking hole 71 axially towards the proximal side of the distal side 72 with its distal side 72.

[0112] In the step of unlocking and pulling the tube assembly 2 out of the handle 33, simply hold the grip section 302 of the unlocking sleeve 300 and pull the unlocking sleeve 300 outward. At this time, the unlocking hole 306 of the unlocking sleeve 300 presses the unlocking surface 207 of the locking protrusion 204 of the locking bushing 200, causing the elastic tab 203 to deform radially inward and drive the locking protrusion 204 to leave the locking hole 71 radially inward to achieve unlocking. Then, continue to pull the tube assembly 2 outward to pull it out of the receiving cavity 35 of the handle 33.

[0113] The plug-in connection scheme designed here has proven to be highly advantageous, being more reliable than other common plug-in connection schemes. Even when the wound tissue needs to be manipulated or pressed during surgery, or even when the tube 4 is undesirably pulled outwards, the connection is less likely to loosen or detach. Compared to threaded connection schemes, it allows for faster intraoperative replacement of tube assemblies 2 of different specifications and models.

[0114] The irrigation and aspiration drainage device 1 may have an aspiration branch 36, which can be used to aspirate dirt, such as bloody fluid or irrigation water, from the surgical area or wound during surgery when needed, so as to make the surgical field clear and reduce wound infection.

[0115] The suction branch 36 may include the aforementioned suction tube 3 at its distal end. The suction tube 3 may be fixed within the handle 33 via the tube retainer 7.

[0116] See Figure 1d and Figure 9dThe suction branch 36 may include an elongated cavity 37 disposed within the handle 33. This cavity 37 may be located near the receiving cavity 35, or the suction tube 3, and may be in fluid communication with the suction tube 3. A through pressure regulating hole 38 is provided on the wall surrounding the cavity 37 of the handle 33, allowing the cavity 37 to communicate with the atmospheric environment. The pressure regulating hole 38 may have a generally teardrop shape and may be located laterally to the handle 33. During suction operation, the suction pressure is maximum when a finger, such as the thumb, fully presses the pressure regulating hole 38; the suction pressure is minimum when the finger does not press the pressure regulating hole 38; and the suction pressure gradually decreases as the area of ​​the pressure regulating hole 38 pressed by the finger decreases. Therefore, during surgical suction of debris, the operator can change the suction negative pressure or suction pressure in the suction branch 36 by changing the area of ​​pressure applied by their finger to the pressure regulating hole 38, thereby changing the speed of suctioning debris from the wound.

[0117] See Figures 1a to 1c The suction branch 36 may include a suction connecting tube 39 disposed near the handle 33. The distal portion of the suction connecting tube 39 may be a soft and elastic medical rubber (silicone) tube, providing a comfortable grip on the handle 33 without pulling or twisting the wrist or causing hand discomfort. The suction connecting tube 39 may have its distal end fitted over a hollow cylindrical protrusion 55 near the handle 33 (see...). Figure 9a The suction connection tube 39 is thus in fluid communication with the suction tube 3 via the cavity 37. The suction connection tube 39 can be connected to a suction machine (not shown) for applying negative pressure via a three-way connector 40. During normal suction operation via the suction branch 36, the lateral port 41 of the three-way connector 40 can be sealed by a plug 42 to maintain negative pressure within the suction branch 36. If the suction branch 36 is blocked by debris and cannot perform normal suction, another irrigation and suction drainage device 1 of the present invention (or a non-disposable irrigation and suction drainage device for the operating room) can be connected via the lateral port 41 to establish a backup suction branch to continue the surgery and avoid interruption. Simultaneously, the suction connection tube 39 can be clamped by a stop clamp 43 (e.g., a Robert clamp) to maintain negative pressure within the backup suction branch 36. At this time, the suction branch 36 can be cleared by a nurse using a cleaning rod.

[0118] The irrigation and aspiration drainage device 1 may have an irrigation branch 44, which can be used to irrigate the wound with an irrigation solution, such as sterile saline or sugar solution, when needed during surgery.

[0119] The flushing branch 44 has a flushing pipe 4 at its distal end. The flushing pipe 4 can be fixed in the handle 33 by means of the pipe retainer 7 at its proximal end.

[0120] See Figure 1d The flushing branch 44 may include a two-way bend connector 45, which can be inserted at its distal end into a radial through hole 46 in the handle 33. This radial through hole 46 can be located radially outside the guide groove 22 on the pipe fixing seat 7 on the wall surrounding the proximal receiving cavity 35.1 of the handle 33 (see also...). Figures 9b to 9d Thus, the two-way bend connector 45 can be in fluid communication with the guide groove 22 via the radial through hole 46. The two-way bend connector 45 can be inserted into the flushing hose 47 at its proximal interface (see also...). Figure 9e The flushing hose 47 can extend approximately parallel to the elongated cavity 37 within the handle 33. The flushing hose 47 may be equipped with a water control device 48 for controlling its opening and closing, which will be described in more detail below.

[0121] Therefore, see Figure 9b and Figure 9d A cavity 49 may be provided on the handle 33 parallel to the elongated cavity 37, and the cavity 49 may be opened laterally and may be covered by a mating cover 56. Figure 9a ) Covering from the side, the cover 56 in Figures 9b to 9e It was removed from the middle.

[0122] See Figures 1a to 1c The irrigation branch 44 may include an irrigation connection tube 50 located proximal to the handle 33. The irrigation connection tube 50 may be a plastic tube, such as a PVC tube. The distal end of the irrigation connection tube 50 may be connected to the proximal end of the irrigation hose 47 via a two-way straight connector 51. The proximal end of the irrigation connection tube 50 may be connected to a plastic needle 52, which can be inserted into an infusion bag (not shown) containing irrigation fluid. If necessary, an infusion pressure bag (not shown) may be fitted over the infusion bag to provide sufficient irrigation pressure. A flow rate regulator 53 may be provided on the irrigation connection tube 50 for stepless adjustment of the irrigation fluid flow rate, which is suitable, for example, for use in delicate minimally invasive surgery. Alternatively, a flow stop clamp (e.g., a Robert clamp) may be used instead of the flow rate regulator 53 to clamp the irrigation connection tube 50.

[0123] The aforementioned two-way bend connector 45, flushing hose 47, water control device 48, and two-way straight connector 51 can be at least partially disposed within the aforementioned cavity 49 of the handle (see...). Figure 9e ).

[0124] Next, combine Figure 1f and Figures 10a to 12c The structure and working principle of a water control device 48 according to one embodiment of the present invention are described.

[0125] The water control device 48 can be mounted on the handle 33 and can be operated by an operator from the same side of the handle 33 as the pressure regulating hole 38. For example, both can be operated by the thumb.

[0126] See Figures 12a to 12c The water control device 48 may have a base 132, which may have cylindrical sidewalls and a bottom wall that is closed at one end and open at the other end. The sidewalls may have two opposing windows 133 through which the flushing hose 47 passes through the base 132. The bottom wall may have a cylindrical protrusion 134 centrally formed thereon.

[0127] See Figures 11a to 11c The water control device 48 may have a button 135, which may have a cylindrical body 142. The diameter of the body 142 may be smaller than the inner diameter of the base 132, so that the body 142 can be embedded in the base 132 and reciprocate relative to the base 132 in the axial direction. The body 142 may have a through-hole 136 extending transversely through its longitudinal axis, through which the flushing hose 47 passes through the base 132. The button 135 may have a downwardly extending cylindrical protrusion 137 at one end and a flat pressing portion 138 on its opposite side, which can be pressed by an operator.

[0128] See Figures 10a to 10c The water control device 48 may have a spring mechanism 139, for example, configured as a compression spring, by which the base 132 and the button 135 cooperate. The button 135 may be partially embedded in the base 132, and the protrusion 137 of the button 135 and the protrusion 134 of the base 132 may be oriented toward each other. The spring mechanism 139 may be located between the base 132 and the button 135, with one end fitted onto the protrusion 134 of the base 132 and the other end fitted onto the protrusion 137 of the button 135. The through portion 136 of the button 135 may have its two opposing openings oriented toward the two windows 133 of the base 132, so that the flushing hose 47 may pass through both the window 133 of the base 132 and the through portion 136 of the button 135 simultaneously (see...). Figure 1fThe spring mechanism 139 can be configured such that, in the unpressed state of the button 135, the spring mechanism 139, with its return force, squeezes the button 135 away from the base 132, causing the flushing hose 47 to be clamped by the shear force applied to the flushing hose 47 by the window 133 of the base 132 and the bottom of the through portion 136 of the button 135, thereby blocking the flow of flushing fluid therein; while in the pressed state of the button 135, the button 135 can overcome the return force of the spring mechanism 139 and move toward the base 132 until the flushing hose 47 is no longer subjected to shear force and is released, thereby releasing the flow of flushing fluid therein.

[0129] See Figure 1f With the water control device 48 installed on the handle 33, the base 132 can be embedded and fixed in the cavity 49 of the handle 33, and the button 135 can be positioned laterally away from the cover 56 towards the handle 33. As described above, the operator can release the flushing fluid in the flushing hose 47 by pressing the button 135 laterally, and can stop the flow of flushing fluid by releasing the button 135.

[0130] In some embodiments, the water control device 48 may also be configured such that the button 135 is a cylindrical structure with one end open and the other end forming a pressing part 138, and the button 135 can be fitted onto the base 132 with its open opening, and a spring mechanism 139 is also provided between the base 132 and the button 135. In some embodiments, the water control device 48 may also be configured such that the base 132 is not separate from the handle 33, but is part of the handle 33, that is, the base 132 is formed by the internal structure of the handle 33.

[0131] The operation process of the surgical irrigation and aspiration drainage device 1 of the present invention will be described next, including an aspiration operation process and an irrigation operation process:

[0132] Suction Operation Process: Without pressing the button 135 of the water control device 48 to block the flushing branch 44, simultaneously press the pressure adjustment hole 38 of the handle 33 with your finger to generate suction pressure in the suction branch 36 for waste suction. The suction pressure can be controlled by adjusting the area of ​​the pressure adjustment hole 38 pressed by your finger, thereby changing the speed of suctioning waste from the wound.

[0133] Rinsing operation process: Instead of pressing the pressure adjustment hole 38 with your finger, press the button 135 of the water control device 48, so that the rinsing hose 47 opens, the rinsing liquid flows through the rinsing hose 47 and flows out from the radial gap 6 between the rinsing pipe 4 and the suction pipe 3, thus realizing the rinsing function; when you release the button 135, the spring mechanism 139 causes the water control device 48 to clamp the rinsing hose 47, thereby stopping the rinsing.

[0134] Therefore, the main technical effects achieved by the surgical irrigation and suction drainage device 1 of the present invention include, but are not limited to: the internal space of the suction tube 3 is not occupied by the irrigation tube 4, ensuring smooth suction operation and reducing the chance of blockage; the irrigation branch 44 and the suction branch 36 are completely independent of each other in terms of fluid, preventing the possibility of suctioned fluid being flushed back into the surgical wound and increasing the chance of secondary infection; the irrigation fluid flow rate can be adjusted according to surgical needs by pre-setting the radial gap 6 between the suction tube 3 and the irrigation tube 4 without affecting the suction function; the handle 33 is provided with a suction pressure adjustment hole 38, which can realize stepless adjustment of suction pressure; the handle 33 is provided with a water control device 48 with a mechanical spring mechanism 139. This allows for instantaneous connection and disconnection of the irrigation hose 47 and subsequently the irrigation branch 44 without the need for additional specialized equipment, making operation easy, quick, and reliable. The sharp edges of the front ends of the suction tube 3 and the irrigation tube 4 are rounded to prevent tissue cuts. The suction tube 3 also has an inwardly rolled edge 5 at its opening to prevent tissue scratching. Because the diameter or volume of the part of the irrigation and suction drainage device 1 that enters the human body is smaller, more instruments can be used simultaneously within the surgical wound channel during surgery. The irrigation and suction drainage device 1 is completely sealed and sterilely connected, reducing the chance of infection. The streamlined design of the finger pinching surface of the handle 33 fully meets ergonomic requirements. Most of the components of the irrigation and suction drainage device 1 are made of plastic, resulting in low cost. The irrigation and aspiration drainage device 1 is for single use, eliminating the risk of cross-infection from reuse. The tube assembly 2 is independently set and self-contained. Different tube assemblies 2 can be designed with various diameters or lengths. During the operation, different diameters or lengths can be changed as needed to meet clinical surgical requirements. The tube assembly 2 can be detachably connected to the handle 33, facilitating the replacement of tube assemblies 2 with other specifications during or before the operation. For example, tube assemblies 2 with longer, shorter, thicker, thinner, more curved and / or straighter irrigation tubes 4 and aspiration tubes 3. The plug-in connection between the tube assembly 2 and the handle 33 with self-locking and unlocking functions ensures that the two do not loosen during the operation, ensuring operational accuracy. On the other hand, compared with threaded connections, tube assembly 2 can be replaced more quickly during the operation.

[0135] Finally, it should be noted that the above embodiments are merely for understanding and explaining the present invention, and do not constitute a limitation on the scope of protection of the present invention. Those skilled in the art can make modifications based on the above embodiments, and all such modifications do not depart from the scope of protection of the present invention.

Claims

1. A tubing assembly for use in surgical irrigation and aspiration drainage instruments, the tubing assembly having a distal end that is further away from the operator during use and a proximal end that is closer to the operator during use, characterized in that, The pipe assembly includes: Suction tube; A flushing tube, wherein the flushing tube and the suction tube are nested together; A tube holder, in which the suction tube and the flushing tube are secured at their proximal ends; A locking bushing, wherein the locking bushing is fitted onto the tube holder and is axially limited relative to the tube holder, and the locking bushing has at least one locking structure on its peripheral wall, the locking structure having a locking protrusion; and An unlocking sleeve is fitted onto the locking bushing, and the unlocking sleeve has at least one unlocking hole on its peripheral wall into which the locking protrusion is embedded. The locking protrusion has a portion that extends radially outward from the unlocking hole to the outside of the unlocking sleeve, and the locking protrusion can be driven radially inward by the unlocking sleeve, causing the portion of the locking protrusion to move radially inward.

2. The pipe assembly according to claim 1, characterized in that, The locking structure of the locking bushing also has an elastic tab, and the locking protrusion is disposed on the elastic tab. When the locking protrusion is driven radially inward by the unlocking sleeve, the elastic tab elastically deforms radially inward. Preferably: The tube fixing seat has a recess on its outer circumferential surface. When the locking protrusion is driven radially inward by the unlocking sleeve, the elastic tab deforms radially inward and enters the recess, or The elastic tab is formed by providing a material gap on the peripheral wall of the locking bushing, or The locking protrusion can be radially driven inward by the unlocking sleeve through axial movement of the unlocking sleeve relative to the locking bushing. In particular, the locking protrusion of the locking bushing has an unlocking surface that extends at an angle to the longitudinal axis of the locking bushing. When the locking protrusion is driven radially inward by the unlocking sleeve, the edge of the unlocking hole of the unlocking sleeve radially inward presses the locking protrusion. In particular, the locking protrusion has a locking surface, and the angle formed between the locking surface and the longitudinal axis of the locking bushing is greater than the angle formed between the unlocking surface and the longitudinal axis of the locking bushing. In particular, the locking surface extends perpendicular to the longitudinal axis of the locking bushing.

3. The pipe assembly according to claim 1, characterized in that, The locking protrusion can be driven radially inward by the unlocking sleeve, causing the portion of the locking protrusion to move radially inward away from the outside of the unlocking sleeve.

4. The pipe assembly according to claim 1, characterized in that, The locking bushing is axially limited by the proximal stop flange and the distal stop flange of the tube fixing seat, respectively. The locking bushing has a conical inner surface at its distal end, such that the diameter of the distal inner edge of the locking bushing is smaller than the maximum outer diameter of the distal stop flange.

5. A pipe assembly kit, characterized in that, The tube assembly kit includes at least two tube assemblies according to any one of claims 1 to 4, wherein the different tube assemblies differ from each other in terms of the length and / or diameter and / or curvature of their suction tubes and / or flushing tubes.

6. A surgical irrigation and aspiration drainage device, characterized in that, The surgical irrigation and aspiration drainage device includes: The pipe assembly according to any one of claims 1 to 4 or the pipe assembly kit according to claim 5; and The handle has a receiving cavity into which a tube assembly can be detachably inserted, wherein the handle has a locking hole on the peripheral wall defining the receiving cavity, and a portion of the locking protrusion of the locking bushing extending radially outward from the unlocking hole of the unlocking bushing can extend into the locking hole of the handle to lock the tube assembly to the handle.

7. The surgical irrigation and aspiration drainage device according to claim 6, characterized in that, With the tube assembly locked to the handle, the locking surface of the locking protrusion can stop in the locking hole of the handle.

8. The surgical irrigation and aspiration drainage device according to claim 6, characterized in that, With the tube assembly locked to the handle, pulling the exposed grip section of the unlocking sleeve axially away from the handle allows the portion of the locking protrusion to move radially inward away from the locking hole of the handle, thereby unlocking the tube assembly from the handle.

9. The surgical irrigation and aspiration drainage device according to claim 6, characterized in that, The insertion section of the insertion cavity of the unlocking sleeve is provided with one of a positioning protrusion and a positioning groove, while the handle is provided with the other of a positioning protrusion and a positioning groove on the inner surface of the peripheral wall defining the cavity. During the process of inserting the unlocking sleeve into the handle, the positioning protrusion is guided in the positioning groove.

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