Tube assembly, tube assembly kit and surgical flushing, suction and drainage instrument

Abstract

The invention relates to a tube assembly which is used for a surgical irrigation, suction and drainage instrument, and is characterized in that the tube assembly comprises a suction tube, an irrigation tube nested with the suction tube, and a tube fixing seat, and the tube assembly can be detachably connected to the surgical irrigation, suction and drainage instrument by means of the tube fixing seat, the tube fixing seat is provided with a suction tube fixing seat section and a flushing tube fixing seat section, the tube fixing seat is fixed with the suction tube through the suction tube fixing seat section and is fixed with the flushing tube through the flushing tube fixing seat section, and the suction tube fixing seat section and the flushing tube fixing seat section are integrally formed. The combined type tube fixing seat has the advantages that the combined type tube fixing seat is integrally formed and can be simultaneously fixed with the flushing tube and the suction tube, so that the tube assembly can be independently arranged and is self-contained, and the combined type tube fixing seat can be detachably connected to the surgical flushing, suction and drainage instrument at any time. The invention further relates to a tube assembly kit and a surgical irrigation, suction and drainage instrument.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a tube assembly, a tube assembly kit, and a surgical irrigation, aspiration, and drainage instrument. Background Art

[0002] Currently, during almost all surgical procedures, it is necessary to irrigate the surgical area or instruments with sterile saline or sugar water, and almost all require timely aspiration of the bloody fluid or irrigation water generated at the wound to clean the surgical field of dirt, make the surgical field clear, and reduce infection.

[0003] At present, there are mainly three ways of irrigation and aspiration applied in domestic hospital surgeries. The first is the traditional open irrigation and aspiration that has been used all along: The nurse opens the sterile saline or sugar water, pours it into a container, then sucks it with a water balloon and hands it to the doctor for use, or scoops it out from the container with a small bowl and hands it to the doctor for use. The following problems occur during this irrigation process: It is very easy to be contaminated during this process because the bottle mouth or bag mouth of the sterile saline is easily contaminated when opened; the water container is exposed to the air for a long time (almost throughout the surgery), which also increases the probability of contamination; there are bacteria on both the hands and the outside of the container, and operating across the water basin does not conform to the sterile principle; in addition, the operation is not convenient. After the surgeon in charge sends a water requirement message, the nurse goes to fetch water and then transfers it, which wastes valuable surgical time. When aspiration is needed, a gauze or aspirator (tube) is used to suck away the excess intraoperative fluid. The aspirator (tube) is generally reusable, that is, after each surgery, the nurse uses a cleaning rod to clean the inside of the aspirator (tube), and cleans the inside and outside, and finally sterilizes it with high temperature and high pressure before using it again. Cleaning the inside of this aspirator (tube) is a difficult problem, which may lead to incomplete cleaning of dirt and infection, and also increases the workload of medical staff. Therefore, this open irrigation and aspiration method is both prone to infection, and the operation is cumbersome and time-consuming.

[0004] The second is the pressure-regulating minimally invasive irrigation and aspiration tube that has emerged on the market in recent years. This product has changed the traditional water supply method, converging the irrigation and aspiration two-way pipelines onto a thin and curved stainless steel aspiration tube, and the stainless steel aspiration tube can extend into the surgical wound. The other end of the irrigation pipeline is connected to a saline bag, and the other end of the aspiration pipeline is connected to a negative pressure aspirator. Through simple handle button switching operation, it is possible to perform irrigation and aspiration on the surgical wound at any time, with convenient operation and shortened surgical time. However, this device has a disadvantage that the irrigation and aspiration two-way pipelines share a thin stainless steel aspiration tube, so a small amount of the wound body fluid sucked away still remains on the inner wall of the shared stainless steel aspiration tube. During irrigation, it is flushed into the surgical wound by the saline again, creating a possibility of secondary infection for the patient. In addition, the irrigation pipeline is relatively thick, with a large amount of water, and it is not very convenient to adjust, and it is not suitable for use in fine minimally invasive surgeries.

[0005] The third type is several improved flushing and suction devices that have emerged in recent years. Their flushing and suction pipelines are set independently of each other, so the problem that the aspirated liquid is flushed back to the surgical wound will not occur. However, these improved flushing and suction devices cannot replace the flushing and suction tubes of other specifications during the operation. Some models are reusable products, and it is difficult to clean the gaps in the product structure. When repeatedly sterilized, the cleaning and sterilization are not thorough, and the risk of cross-infection is likely to occur. There are also some models that are disposable, but the flushing pipeline is nested in the suction channel, which partially occupies the cross-sectional space of the suction channel, so the suction channel is prone to blockage. In addition, the switching function of the flushing pipeline of this model is controlled by an electric circuit, and the flushing pipeline needs to be used with special equipment devices, making the equipment used complex, the operation cumbersome, inconvenient to store the equipment in the operating room, troublesome to carry back and forth, and affecting the convenient use of the product.

[0006] Finally, the applicant described in its prior patent (CN217593490U) a flushing and suction device with a split support, in which the two support parts are separated from each other and arranged at an axial distance, and are respectively used to fix the flushing tube and the suction tube. However, this flushing and suction device also cannot or is difficult to replace the flushing and suction tubes of other specifications during the operation. Especially after the tubes are bent by a tooling or manually, the structure of the tube sleeve makes it impossible to pull out the two support parts of the split support one by one. Summary of the Invention

[0007] The object of the present invention is to provide a tube assembly, a tube assembly kit and a surgical flushing, suction and drainage instrument, which can at least solve one of the above-mentioned problems.

[0008] To achieve the above object, the present invention provides a tube assembly for a surgical flushing, suction and drainage instrument. The tube assembly has a distal end that is farther from the operator during use and a proximal end that is closer to the operator during use. The tube assembly is characterized in that it includes a suction tube, a flushing tube nested with the suction tube, and a tube fixing seat. The tube assembly can be detachably connected to the surgical flushing, suction and drainage instrument by means of the tube fixing seat. Among them, the tube fixing seat has a suction tube fixing seat section and a flushing tube fixing seat section. The tube fixing seat is fixed to the suction tube via the suction tube fixing seat section and fixed to the flushing tube via the flushing tube fixing seat section. Among them, the suction tube fixing seat section and the flushing tube fixing seat section are integrally formed.

[0009] The beneficial effects of the tube assembly of the present invention for a surgical flushing, suction and drainage instrument are, but not limited to, that the composite tube fixing seat is integrally formed and can be fixed to both the flushing tube and the suction tube at the same time, so that the tube assembly can be independently set and self-contained, and is convenient to be detachably connected to the surgical flushing, suction and drainage instrument at any time.

[0010] Advantageously, the tube fixing seat is provided with an external thread, and the tube fixing seat can be detachably connected to the surgical irrigation and aspiration drainage instrument in a threaded connection manner with its external thread.

[0011] Advantageously, the tube fixing seat is provided with a surface structure facilitating the application of force for screwing on its outer periphery, distal to its external thread, and the surface structure can be grasped by an operator in the installed state of the tube assembly.

[0012] Advantageously, the tube fixing seat has a liquid inlet section, which is arranged between the aspiration tube fixing seat section and the irrigation tube fixing seat section. The liquid inlet section has a radially extending liquid inlet hole, and the irrigation liquid can enter the radially inner side of the liquid inlet section from the radially outer side of the liquid inlet section by means of the liquid inlet hole.

[0013] Advantageously, the irrigation tube is sleeved on the aspiration tube, and the irrigation tube fixing seat section is arranged distal to the aspiration tube fixing seat section. Among them, the irrigation liquid can enter the liquid inlet space formed by the inner surface of the liquid inlet section and the outer surface of the aspiration tube from the radially outer side of the liquid inlet section by means of the liquid inlet hole, and the liquid inlet space is in fluid communication with the radial gap between the aspiration tube and the irrigation tube.

[0014] Advantageously, the liquid inlet section is provided with a circumferentially extending guiding groove on its outer periphery, and the guiding groove extends through and intersects with the liquid inlet hole.

[0015] Advantageously, the tube fixing seat is provided with an external thread on its outer periphery, distal to the liquid inlet hole.

[0016] Advantageously, the aspiration tube fixing seat section has an axial limiting step for the aspiration tube. The aspiration tube is provided with a surface structure on the outer peripheral surface of its proximal end, and the aspiration tube can be axially stopped on the radially extending step surface of the axial limiting step for the aspiration tube by means of its surface structure.

[0017] Advantageously, the surface structure extends over the entire circumference of the aspiration tube.

[0018] Advantageously, the aspiration tube fixing seat section is provided with a first space proximal to its axial limiting step for the aspiration tube and a second space adjacent to and having a diameter smaller than that of the first space, distal to the first space. Among them, the aspiration tube passes through the first space and the second space, and the aspiration tube fixing seat section forms a glue receiving portion with the aspiration tube in the first space.

[0019] Advantageously, the aspiration tube fixing seat section is provided with an outwardly open flared opening adjacent to the first space, proximal to the first space.

[0020] Advantageously, the flushing tube fixing seat section has a flushing tube axial limiting step, and the flushing tube can be axially stopped at the radially extending step surface of the flushing tube axial limiting step with its proximal end face.

[0021] Advantageously, a first space is provided on the far side of the flushing tube axial limiting step of the flushing tube fixing seat section, and a second space that is adjacent to the first space on the near side of the first space and has a diameter smaller than that of the first space, wherein the flushing tube passes through the first space and the second space, and the flushing tube fixing seat section forms a glue accommodating portion with the flushing tube in the first space.

[0022] Advantageously, the flushing tube fixing seat section is provided with an outwardly open flare adjacent to the first space on the far side of the first space.

[0023] Advantageously, the tube fixing seat is provided with an annular groove for accommodating a radial sealing ring on its outer periphery near the liquid inlet hole.

[0024] Advantageously, the tube fixing seat is provided with an annular groove for accommodating a radial sealing ring on its outer periphery far from the liquid inlet hole.

[0025] Advantageously, the tube fixing seat is provided with an annular groove for accommodating a radial sealing ring on its outer periphery far from the external thread.

[0026] The present invention also provides a tube component kit, characterized in that the tube component kit includes at least two tube components according to the present invention, wherein different tube components are different from each other in terms of the length and / or diameter and / or curvature of their suction tubes and / or flushing tubes. Multiple different tube components can be included in the same tube component kit, and the flushing tubes and / or suction tubes of these tube components can be designed with various diameter or length or curvature specifications. Therefore, during the operation, different diameter or length specifications can be replaced according to the operation needs to meet the clinical operation requirements.

[0027] The present invention also provides a surgical flushing, suction and drainage instrument, characterized in that the surgical flushing, suction and drainage instrument includes:

[0028] A handle that can be held by an operator during the operation; and

[0029] A tube component according to the present invention or a tube component kit according to the present invention, and each tube component of the tube component or the tube component kit can be detachably connected to the handle.

[0030] Advantageously, the tube fixing seat of the tube component can be fixed in the inner threaded accommodation cavity of the handle with its external thread.

[0031] Advantageously, the pipe fixing seat is provided with a surface structure facilitating force application for screwing on its outer periphery, distal to its external thread, and in the installed state of the pipe assembly, at least part of the surface structure is exposed from the accommodation cavity and can be grasped by an operator.

[0032] Advantageously, the accommodation cavity of the handle is provided with a conical surface for sealing fit at the opening of its distal end. Description of the Drawings

[0033] The present invention will be explained in more detail below with reference to the drawings by way of examples, but the present invention is not limited to the examples described in the drawings and detailed below. The drawings are as follows:

[0034] Figure 1a is a schematic side view according to an embodiment of the present invention;

[0035] Figure 1b is Figure 1a a schematic side view of the surgical irrigation, aspiration and drainage instrument in

[0036] Figure 1c is Figure 1a a schematic top view of the surgical irrigation, aspiration and drainage instrument in

[0037] Figure 2a is Figure 1a a schematic diagram of the pipe assembly of the surgical irrigation, aspiration and drainage instrument in

[0038] Figure 2b is Figure 2a a schematic diagram of the pipe assembly in

[0039] Figure 3a is Figure 2b a schematic enlarged view of the partial III of the pipe assembly in

[0040] Figure 3b is Figure 2a a schematic perspective view of the pipe fixing seat of the pipe assembly in

[0041] Figure 4 is Figure 2a a schematic diagram of the aspiration tube of the pipe assembly in

[0042] Figure 5 is Figure 4 a schematic enlarged view of the dissected partial IV of the aspiration tube in

[0043] Figure 6 is Figure 1b a schematic enlarged view of the partial I of the surgical irrigation, aspiration and drainage instrument in

[0044] Figure 7a is Figure 1a a schematic side view of the handle of the surgical irrigation, aspiration and drainage instrument in

[0045] Figure 7b is Figure 7a a schematic bottom view of the handle in , where the cover and the water control device are removed;

[0046] Figure 7c is Figure 7b a schematic cross-sectional view of the handle taken along the cutting plane H-H in ;

[0047] Figure 7d is Figure 7b a schematic perspective view of the handle in ;

[0048] Figure 8 is Figure 1c a schematic enlarged view of the partial II of the surgical irrigation, aspiration and drainage instrument in ;

[0049] Figure 9a is a perspective view of the water control device of the surgical irrigation, aspiration and drainage instrument in Figure 1;

[0050] Figure 9b is Figure 9a a side view of the water control device in ;

[0051] Figure 9c is Figure 9a the other side view of the water control device in ;

[0052] Figure 10a is Figure 9a a perspective view of the button of the water control device in ;

[0053] Figure 10b is Figure 10a a side view of the button in ;

[0054] Figure 10c is Figure 10a the other side view of the button in ;

[0055] Figure 11a is Figure 9a a perspective view of the base of the water control device in ;

[0056] Figure 11b is Figure 11a a side view of the base in ; and

[0057] Figure 11c is Figure 11a the other side view of the base in . Detailed implementation manners

[0058] The following describes illustrative embodiments of the surgical irrigation, aspiration, and drainage instrument 1 of the present invention and its tube assembly 2. In this specification, for purposes of explanation only, various systems, structures, and devices are schematically depicted in the drawings, but not all features of the actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid obscuring the present invention with unnecessary details. Of course, it should be understood that in any actual application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and industry-related and system-related limitations need to be complied with, and these specific goals may vary depending on the actual application. In addition, it should be understood that such specific implementation decisions, although complex and time-consuming, are routine tasks for those of ordinary skill in the art who benefit from the present invention.

[0059] The terms and phrases used herein should be understood and interpreted to have meanings consistent with the understanding of those of ordinary skill in the relevant art. The consistent use of terms or phrases herein is not intended to imply a special definition of the terms or phrases, i.e., a definition different from the ordinary and customary meanings understood by those of ordinary skill in the art. For terms or phrases intended to have a special meaning, i.e., a meaning different from that understood by those of ordinary skill in the art, such special definitions will be explicitly set forth in the specification in a definitional manner, directly and unambiguously giving the special definition of the term or phrase.

[0060] Unless the context requires otherwise, throughout the following specification, the word "comprising" and its variants, such as "including" and "having", will be interpreted in an open, inclusive sense, i.e., as "including but not limited to".

[0061] Next, in conjunction with FIGS. 1 to Figure 11c Exemplarily illustrate the surgical irrigation, aspiration, and drainage instrument 1 according to an embodiment of the present invention. The surgical irrigation, aspiration, and drainage instrument 1 can be applicable to irrigation and aspiration during neurosurgical craniocerebral and spinal surgeries, otolaryngology, orthopedics, head and neck, and other specialized microsurgical procedures, and can also be applicable to irrigation and aspiration during endoscopic surgeries and various deep tissue structure surgeries, as well as irrigation and aspiration of surgical wounds rich in small blood vessels and nerves to ensure a clear and clean surgical field for minimally invasive surgeries.

[0062] See Figures 1a to 1c , the surgical irrigation, aspiration, and drainage instrument 1 can have a distal end far from the operator and a proximal end close to the operator during the surgery. The operator can be a doctor or other personnel who operate the surgical irrigation, aspiration, and drainage instrument 1 during the surgery.

[0063] See Figures 1a to 2b , the irrigation, aspiration, and drainage instrument 1 can have a tube assembly 2 at the distal end, and the tube assembly 2 is detachable so that it can be replaced with other specifications of tube assemblies 2 during the surgery.

[0064] See Figure 2a , Figure 2b , Figure 4 and Figure 5 , the tube assembly 2 may have a suction tube 3 which can extend its distal end into the wound during surgery to suck up dirt. The suction tube 3 can be made of a metallic material, such as medical stainless steel material, and can have a soft hardness so as to be bent into a required shape at will when needed during surgery. The suction tube 3 can have a cylindrical tubular shape, and its distal end can be provided with an inward-rolled mouth or an inward-rolled edge 5 (see Figure 5 ) to prevent it from cutting the weak tissues of the human body during surgery.

[0065] See Figure 2a and Figure 2b , the tube assembly 2 may have an irrigation tube 4 which can bring its distal end close to or extend into the wound during surgery to irrigate the wound. The irrigation tube 4 can be made of a metallic material, such as medical stainless steel material, and can have a soft hardness so as to be bent into a required shape at will during surgery. The irrigation tube 4 can have a cylindrical tubular shape, and its distal end can be provided with a rounded mouth (not shown) to prevent it from cutting the weak tissues of the human body during surgery. The diameter of the irrigation tube 4 can be larger than the diameter of the suction tube 3. Thus, the irrigation tube 4 can be coaxially sleeved outside the suction tube 3 with a radial distance therebetween and form a radial gap 6 (see Figure 3a and Figure 6 ). Therefore, the irrigation tube 4 and the suction tube 3 can form a tube-in-tube structure, thereby realizing their compact integration and being independent and separate from each other. The irrigation fluid can flow through the radial gap 6 between the irrigation tube 4 and the suction tube 3 and flow out from the distal opening of the irrigation tube 4. The irrigation tube 4 can be arranged such that its distal opening is staggered backward or proximally relative to the distal opening of the suction tube 3 by a certain distance. Thus, the irrigation fluid can flow out from the distal opening of the irrigation tube 4 in a jet shape and can be guided along the outer periphery of the exposed portion of the suction tube 3 towards the wound. In addition, it can effectively prevent the irrigation fluid from being sucked back by the suction tube 3.

[0066] See Figure 2a , Figure 2b and Figure 3a , Figure 3b , the tube assembly 2 may further have a hollow integral or composite tube fixing seat 7, and the tube fixing seat is integrally formed, for example, integrally injection molded. The tube fixing seat 7 is not only used to fix the suction tube 3 but also used to fix the irrigation tube 4. For this purpose, the tube fixing seat 7 may have a proximal suction tube fixing seat section 8 for fixing the suction tube 3 and a distal irrigation tube fixing seat section 9 for fixing the irrigation tube 4.

[0067] See Figure 3a, the suction tube fixing seat section 8 can have a multi-stepped structure centered on its inner surface, which encloses cylindrical suction tube fixing spaces with different diameters allocated to the suction tube 3. The suction tube 3 can pass through the suction tube fixing space of the suction tube fixing seat section 8 with its proximal end and be adhesively fixed (such as with AB glue) within the suction tube fixing space.

[0068] For this purpose, the suction tube fixing space can successively include from the proximal end to the distal end: a frustoconical flare 10; a first cylindrical space 11 adjacent to the flare 10; a second cylindrical space 12 adjacent to the first cylindrical space 11 and having a diameter smaller than it; a third cylindrical space 13 adjacent to the second cylindrical space 12 and having a diameter smaller than it. The outer diameter of the suction tube 3 can be slightly smaller than the diameters of the second cylindrical space 12 and the third cylindrical space 13. Thus, referring to Figure 3a , the suction tube 3 can be inserted through the second cylindrical space 12 and the third cylindrical space 13.

[0069] A glue receiving portion 14 is formed between the outer surface of the suction tube 3 and the inner surface of the suction tube fixing seat section 8 defining the first cylindrical space 11. Glue can be easily injected into the glue receiving portion 14 via the flare 10, for example, when the suction tube fixing seat section 8 is placed vertically upward, so as to glue-connect the suction tube 3 and the suction tube fixing seat section 8 to each other. And the second cylindrical space 12 is mainly responsible for radially constraining the suction tube 3 during the installation of the suction tube 3.

[0070] The third cylindrical space 13 can be surrounded by a suction tube axial limiting step 15 specifically designed here. Here, the suction tube axial limiting step 15 can be used to define the axial position of the suction tube 3. For this purpose, referring to Figure 3a and Figure 4 , on the proximal outer peripheral surface of the suction tube 3, a surface structure 16, such as knurling or reticulation, etc., which cooperates with the suction tube axial limiting step 15 can be provided. The surface structure 16 projects radially outward from the outer peripheral surface of the suction tube 3. The surface structure 16 can increase the friction force in case of potential displacement or rotation, and increase the connection firmness between the suction tube 3 and the suction tube fixing seat section 8. The surface structure 16 is provided on the entire annular outer peripheral 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. Thus, for example, when the suction tube fixing seat section 8 is placed vertically upward and the suction tube 3 is inserted into the suction tube fixing space of the suction tube fixing seat section 8 from top to bottom, the suction tube 3 can be stopped with its surface structure 16 on the step surface ( Figure 3a in this case is the left side surface of the step) of the suction tube axial limiting step 15. This facilitates the subsequent glue injection process into the suction tube fixing space.

[0071] For the convenience of understanding the relative dimensions involved above, the following examples are given: Suppose the outer diameter of the suction tube 3 is 3 mm, then the diameter of the first cylindrical space 11 can be set to 3.8 mm, the diameter of the second cylindrical space 12 can be set to 3.3 mm, the diameter of the surface structure 16 can be set to 3.2 mm, and the diameter of the third cylindrical space 13 can be set to 3.1 mm or 3.05 mm, which ensures that the part 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 only illustrative and not restrictive.

[0072] In addition, the suction tube fixing seat section 8 is not provided with an external thread 23 on its outer peripheral surface, but is provided with an annular groove 18 for accommodating the radial sealing ring 17 at its proximal end. Thus, the sealing ring 17 can be disassembled and installed together with the tube fixing seat 7, thereby facilitating the overall replacement of the tube assembly 2.

[0073] See Figure 3a and Figure 3b , on the distal side of the suction tube fixing seat section 8, the tube fixing seat 7 can have a liquid inlet section 19, and the liquid inlet section 19 allows the flushing liquid 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 fixing seat 7. For this purpose, the liquid inlet section 19 has a radially extending liquid inlet hole 21 immediately after the axial limiting step 15 of the suction tube, and the flushing liquid can enter the liquid inlet space 20 inside the tube fixing seat 7 from the outside of the tube fixing seat 7 via the liquid inlet hole 21. Two radially opposed liquid inlet holes 21 are shown here, but other numbers and other arrangements of liquid inlet holes 21 are also conceivable. Here, the liquid inlet hole 21 is elliptical, but other shapes such as circular and square are also conceivable. In addition, the tube fixing seat 7 is provided with an annularly extending guide groove 22 on its outer periphery, and the guide groove 22 extends through and intersects with the liquid inlet hole 21, and the flushing liquid can be guided to the liquid inlet hole 21 via the guide groove 22 and enter the liquid inlet space 20 from the liquid inlet hole 21.

[0074] Due to the presence of the liquid inlet hole 21 (the aperture of which is usually small), the combined use of the surface structure 16 of the above-mentioned suction tube 3 and the suction tube axial limiting step 15 of the suction tube fixing seat section 8 can, in addition to playing the above-mentioned axial limiting role for the suction tube 3, also achieve the following unexpected technical effects: on the one hand, the suction tube axial limiting step 15 can block the liquid glue from flowing from the glue accommodating part 14 through the second cylindrical space 12 to the liquid inlet hole 21 on the tube fixing seat 7; on the other hand, the suction tube 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 with glue from approaching the liquid inlet hole 21 during assembly. Both of these aspects are beneficial to avoiding the liquid inlet hole 21 from being undesirably blocked by glue, which affects the entry of the flushing liquid. This has been proven to be very beneficial in practice, which solves the problem that the liquid inlet hole 21 is easily blocked by glue during assembly, and then ensures the flushing function.

[0075] See Figure 3a and Figure 3b , on the outer circumferential surface of the tube fixing seat 7 on the far side of the liquid inlet hole 21, an external thread 23 can be provided. The external thread 23 is basically located on the outer circumferential surface of the liquid inlet section 19.

[0076] See Figure 3a , the flushing tube fixing seat section 9 can be arranged on the far side of the liquid inlet section 19, and can have a multi-step structure centered on its inner surface, which encloses cylindrical flushing tube fixing spaces with different diameters configured for the flushing tube 4. The flushing tube 4 can insert its proximal end into the flushing tube fixing space of the flushing tube fixing seat section 9 and be adhesively fixed (such as with AB glue) in the flushing tube fixing space.

[0077] For this purpose, the flushing tube fixing space can successively include from the distal end to the proximal end: a frustum-shaped flare 24; a first cylindrical space 25 adjacent to the flare 24 and a second cylindrical space 26 adjacent to the first cylindrical space 25 and with a diameter smaller than it. The outer diameter of the flushing tube 4 can be slightly smaller than the diameter of the second cylindrical space 26. Thus, see Figure 3a , the flushing tube 4 can be inserted into the first cylindrical space 25 and the second cylindrical space 26.

[0078] A glue accommodating part 27 is formed between the outer surface of the flushing tube 4 and the inner surface of the flushing tube fixing seat section 9 that defines the first cylindrical space 25. Glue can be easily injected into the glue accommodating part 27 via the flare 24, for example, when the flushing tube fixing seat section 9 is placed vertically upward, so as to glue and connect the flushing tube 4 and the flushing tube fixing seat section 9 to each other. And the second cylindrical space 26 is mainly responsible for radially constraining the flushing tube 4 when installing the flushing tube 4.

[0079] Here, the second cylindrical space 26 of the flushing tube fixing seat section 9 can be directly adjacent to the above-mentioned liquid inlet space 20, and the diameter of the former is larger than that of the latter. Therefore, 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 provided on the outer peripheral surface of the proximal end of the flushing tube 4, such as knurling or reticulation, is larger than the diameter of the liquid inlet space 20. Thus, the above-mentioned stepped surface can form the stepped surface of the flushing tube axial limiting step 28 for axially limiting the flushing tube 4 here. The surface structure 16 can increase the friction force in case of potential displacement or rotation, and increase the connection firmness between the flushing tube 4 and the flushing tube fixing seat section 9. When the flushing tube 4 is inserted vertically downward into the flushing tube fixing space of the flushing tube fixing seat section 9 with the flushing tube fixing seat section 9 placed vertically upward, the proximal end face of the flushing tube 4 can at least partially abut against the stepped surface of the flushing tube axial limiting step 28 ( Figure 3a on the right side surface of the step). This facilitates the subsequent glue injection process into the flushing tube fixing space.

[0080] It can be seen from Figure 3a that the liquid inlet space 20 is in direct fluid communication with the radial gap 6 between the suction tube 3 and the flushing tube 4. Thus, the flushing liquid entering the liquid inlet space 20 can directly enter the radial gap 6 between the two tubes 3 and 4 and flow out from the distal end port of the flushing tube 4 along the radial gap 6.

[0081] In addition, referring to Figure 3b , the tube fixing seat 7 or its flushing tube fixing seat section 9 is designed with a surface structure 29 facilitating force application for screwing on its outer peripheral surface, such as convex stripes or concave rib grooves, so that the tube assembly 2 can be easily tightened or unscrewed with fingers from the handle 33 to be introduced below, in order to replace it with a tube assembly 2 of different specifications and sizes. For this purpose, referring to Figure 6 , when the tube fixing seat 7 is screwed into the handle 33, the flushing tube fixing seat section 9 or its surface structure 29 is exposed outside and can be manipulated.

[0082] The flushing tube fixing seat section 9 is provided with an annular groove 31 for accommodating a radial sealing ring 30 at its proximal side. The annular groove 31 is adjacent to the external thread 23 on the liquid inlet section 19 at its proximal side and is adjacent to a flange 32 provided at the proximal end of the flushing tube fixing seat section 9 at its distal side. That is to say, the annular groove 31 is bounded by the external thread 23 and the flange 32 on both sides. Thus, the sealing ring 30 can be disassembled and installed together with the tube fixing seat 7, thereby facilitating the overall replacement of the tube assembly 2. In Figure 3a , the outer diameter of the radial sealing ring 30 is larger than the outer diameter of the external thread 23 and smaller than the outer diameter of the flange 32.

[0083] Referring to Figures 7a to 7d, the irrigation aspiration drainage instrument 1 may have a handle 33 for an operator to hold during surgery. The handle 33 may be made of plastic to reduce costs. The handle 33 may have a finger pinching surface with a streamlined design to meet the ergonomic requirements and increase the comfort of holding. The handle 33 may be partially provided with a soft rubber structure to increase the anti-slip force of the handhold.

[0084] See Figure 6 and Figure 7c , at its distal end, the handle 33 may have a cylindrical receiving cavity 35 with an internal thread 34, and the tube assembly 2 may be threadedly connected to the receiving cavity 35 with its tube fixing seat 7.

[0085] The threaded connection here has been proven to be very advantageous in practice. Compared with the plug-in connection, although different specifications and models of the tube assembly 2 can be replaced during surgery, the fixation of the plug-in connected tube assembly 2 is not reliable. Because it is found in practice that when it is necessary to pull and pick the wound tissue during surgery, the connection of the plug-in connection is likely to loosen and fall off, causing trouble to the doctor.

[0086] The irrigation aspiration drainage instrument 1 may have an aspiration branch 36, which can be used to aspirate dirt, such as the bloody liquid or irrigation water generated at the wound, from the human surgical area or the wound during surgery when needed, so as to make the surgical field clear and reduce wound infection.

[0087] The distal end of the aspiration branch 36 may include the above-mentioned aspiration tube 3. The aspiration tube 3 may be fixed within the handle 33 via the tube fixing seat 7.

[0088] See Figure 6 and Figure 7c , the aspiration branch 36 may include an elongated cavity 37 provided within the handle 33. The cavity 37 may be provided proximal to the receiving cavity 35 or the aspiration tube 3, and may be in fluid communication with the aspiration tube 3 at its distal end. A through pressure adjustment hole 38 is provided in the wall of the handle 33 surrounding the cavity 37, and the pressure adjustment hole 38 may communicate the cavity 37 with the atmospheric environment. The pressure adjustment hole 38 may have a generally water droplet shape and may be provided on the side of the handle 33. During the aspiration operation, when a finger, such as the thumb, presses all the pressure adjustment holes 38, the aspiration pressure is the greatest; when the finger does not press the pressure adjustment hole 38, the aspiration pressure is the smallest; when the area of the pressure adjustment hole 38 pressed by the finger becomes smaller and smaller, the aspiration pressure gradually changes from large to small. Therefore, when aspirating dirt during surgery, the operator can change the aspiration negative pressure or the aspiration pressure in the aspiration branch 36 by changing the pressing area of his finger on the pressure adjustment hole 38, and thus change the speed of aspirating the wound dirt.

[0089] See Figures 1a to 1c, the suction branch 36 may include a suction connecting tube 39 disposed proximal to the handle 33. The distal portion of the suction connecting tube 39 may be a flexible and elastic medical rubber (silicone) tube, so that when holding the handle 33, it feels comfortable, does not twist the wrist and does not feel awkward. The suction connecting tube 39 may have its distal end sleeved on a hollow cylindrical protrusion 55 (see Figure 7a ) at the proximal end of the handle 33 and is in fluid communication with the cavity 37. Thus, the suction connecting tube 39 can be in fluid communication with the suction tube 3 via the cavity 37. The suction connecting tube 39 can be connected to a suction machine (not shown) for applying negative pressure via a three-way joint 40. When the suction operation is normally performed via the suction branch 36, the lateral interface 41 of the three-way joint 40 can be blocked by a plug 42 disposed thereon to maintain the negative pressure in the suction branch 36. When the suction branch 36 cannot perform the normal suction operation due to being blocked by dirt, another flushing suction drainage instrument 1 of the present invention (or a non-disposable flushing suction drainage device in the operating room) can be connected to the lateral interface 41 to establish a standby suction branch to continue the operation and avoid interruption of the operation. At the same time, the suction connecting tube 39 can be clamped by a stop clamp 43 (such as a Robert clamp) disposed thereon to maintain the negative pressure in the standby suction branch 36. At this time, the suction branch 36 can be dredged by a nurse with a cleaning rod.

[0090] The flushing suction drainage instrument 1 may have a flushing branch 44, and the flushing branch 44 can be used to flush the wound with a flushing fluid, such as sterile normal saline or sugar water, when needed during the operation.

[0091] The flushing branch 44 has a flushing tube 4 at its distal end. See Figure 6 , the flushing tube 4 can have its proximal end fixed in the handle 33 by means of a tube fixing seat 7.

[0092] See Figure 6 , the flushing branch 44 may include a two-way elbow joint 45, and the two-way elbow joint 45 can have its distal interface inserted into a radial through hole 46 of the handle 33. The radial through hole 46 can be disposed on the wall of the handle 33 surrounding the receiving cavity 35 outside the radial direction of the guiding groove 22 on the tube fixing seat 7 (see Figures 7b to 7d ). Thus, the two-way elbow joint 45 can be in fluid communication with the guiding groove 22 via the radial through hole 46. The two-way elbow joint 45 can have its proximal interface inserted into a flushing hose 47 (see Figure 6 ), and the flushing hose 47 can extend substantially parallel to the elongated cavity 37 in the handle 33. The flushing hose 47 can be provided with a water control device 48 for controlling its opening and closing, which will be described in detail later.

[0093] Thus, see Figure 7c and Figure 7d, a cavity 49 may be provided below the handle 33 parallel to the elongated cavity 37, and the cavity 49 may be open laterally and may be covered laterally by a mating cover member 56( Figure 8 ), and the cover member 56 is removed in Figure 7b and Figure 7d .

[0094] See Figures 1a to 1c , the flushing branch 44 may include a flushing connection pipe 50 provided proximal to the handle 33. The flushing connection pipe 50 may be a plastic pipe, such as a PVC pipe. The distal end of the flushing connection pipe 50 may be connected to the proximal end of the flushing hose 47 via a two-way straight joint 51. The proximal end of the flushing connection pipe 50 may be connected to a plastic needle 52, and the plastic needle 52 may be inserted into an infusion bag (not shown) containing the flushing liquid. Optionally, an infusion pressure bag (not shown) may be sleeved outside the infusion bag to provide sufficient flushing pressure. A flow rate regulator 53 may be provided on the flushing connection pipe 50 for steplessly adjusting the flow rate of the flushing liquid, which is suitable for use in fine minimally invasive surgeries, for example. It is also conceivable to use a stop clamp (such as a Robert clamp) instead of the flow rate regulator 53 for clamping the flushing connection pipe 50.

[0095] The above-mentioned two-way bent joint 45, flushing hose 47, water control device 48 and two-way straight joint 51 may be provided together in the cavity 49 of the handle, and may all be covered laterally by the cover member 56 except for the water control device 48.

[0096] In addition, see Figure 6 , when the tube assembly 2 is screwed into the handle 33, the two sealing rings 17, 30 respectively seal against the inner surfaces at both ends of the receiving cavity 35 of the handle 33. The distal sealing ring 30 may seal the flushing liquid against the external environment to prevent the flushing liquid from overflowing to the external environment. For this purpose, the receiving cavity 35 of the handle 33 is provided with a conical surface 60 for sealing cooperation at the opening at its distal end, and the sealing ring 30 may abut against the conical surface 60. The proximal sealing ring 17 may seal the flushing liquid against the cavity 37 for the suction branch 36 to prevent the flushing liquid from overflowing into the cavity 37 of the suction branch 36. In order to better abut the proximal sealing ring 17 against the inner surface of the receiving cavity 35, a cylindrical surface 54 may be provided proximal to the internal thread 34 of the receiving cavity 35 for sealing cooperation with the proximal sealing ring 17.

[0097] Next, the structure and working principle of the water control device 48 according to an embodiment of the present invention will be described in conjunction with Figures 8 to 11c .

[0098] The water control device 48 can be provided on the handle 33 and can be operated by an operator starting from the same side of the handle 33 as the side where the pressure adjustment hole 38 is located. For example, both can be operated by the thumb.

[0099] See Figures 11a to 11c , the water control device 48 can have a base 132, which can have a cylindrical side wall and a bottom wall closing the side wall at one end and being open at the other end. The side wall can have two opposed windows 133 through which the flushing hose 47 can pass through the base 132. The bottom wall can be formed with a cylindrical protrusion 134 centered thereon.

[0100] See Figures 10a to 10c , the water control device 48 can have a button 135, which can have a cylindrical body 142. The diameter of the body 142 can be smaller than the inner diameter of the base 132, so that the body 142 can be inserted into the base 132 and reciprocate axially relative to the base 132. The body 142 can have a through hole 136 penetrating through itself transversely to its longitudinal axis through which the flushing hose 47 can pass through the base 132. The button 135 can have a downwardly extending cylindrical protrusion 137 at one end and a flat pressing portion 138 at the opposite side, and the pressing portion 138 can be pressed by the operator.

[0101] See Figures 9a to 9c , the water control device 48 can have a spring mechanism 139 configured as a compression spring for example, and the base 132 and the button 135 can cooperate with each other by means of the spring mechanism 139. The button 135 can be partially inserted into the base 132, and the protrusion 137 of the button 135 and the protrusion 134 of the base 132 can be oriented towards each other. The spring mechanism 139 can be located between the base 132 and the button 135, and can be sleeved on the protrusion 134 of the base 132 at one end and on the protrusion 137 of the button 135 at the other end. The through hole 136 of the button 135 can be oriented with its two opposed openings towards the two windows 133 of the base 132 respectively, so that the flushing hose 47 can pass through the window 133 of the base 132 and the through hole 136 of the button 135 simultaneously (see Figure 8)。The spring mechanism 139 can be configured such that in the non-pressed state of the button 135, the spring mechanism 139 presses the button 135 away from the base 132 with its return force, so that the flushing hose 47 is clamped by the shearing 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 the flushing liquid therein; while in the pressed state of the button 135, the button 135 can move towards the base 132 against the return force of the spring mechanism 139 until the flushing hose 47 is no longer subjected to the shearing force and is released, thereby releasing the flow of the flushing liquid therein.

[0102] See Figure 8 , in the installed state of the water control device 48 on the handle 33, the base 132 can be fixedly embedded in the cavity 49 of the handle 33, and the button 135 can be positioned laterally away from the cover member 56 towards the handle 33. As described above, the operator can release the flushing liquid in the flushing hose 47 by pressing the button 135 laterally, and block the flow of the flushing liquid by releasing the button 135.

[0103] In some embodiments, the water control device 48 can also be configured as follows, that is, the button 135 can be configured as a cylindrical structure with one end open and the other end forming a pressing portion 138, and the button 135 can be sleeved on the base 132 with a smaller diameter 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 can also be configured as follows, that is, the base 132 is not separate from the handle 33, but is a part of the handle 33, that is to say, the base 132 is formed by the internal structure of the handle 33.

[0104] Next, the operation process of the surgical flushing and suction drainage instrument 1 of the present invention will be described, which includes a suction operation process and a flushing operation process:

[0105] Suction operation process: Do not press the button 135 of the water control device 48 with a finger to block the flushing branch 44 by using the water control device 48, and at the same time press the pressure adjustment hole 38 of the handle 33 with a finger to generate a suction pressure in the suction branch 36 to perform a dirt suction operation. The magnitude of the suction pressure can be controlled by adjusting the area of the finger pressing the pressure adjustment hole 38, thereby changing the speed of sucking the wound dirt.

[0106] Flushing operation process: Instead of pressing the pressure adjustment hole 38 with a finger, press the button 135 of the water control device 48, so that the flushing hose 47 is opened, the flushing liquid flows through the flushing hose 47 and flows out from the radial gap 6 between the flushing tube 4 and the suction tube 3, and the flushing function can be realized; when the finger releases the button 135, the spring mechanism 139 causes the water control device 48 to clamp the flushing hose 47, thereby stopping the flushing.

[0107] Therefore, the main technical effects that the surgical irrigation, aspiration and drainage instrument 1 of the present invention can achieve include, but are not limited to: the internal space of the aspiration tube 3 is not occupied by the irrigation tube 4, the aspiration operation is unobstructed, and the probability of blockage is reduced; the irrigation branch 44 and the aspiration branch 36 are completely independent of each other in terms of fluid, and it is no longer possible to suck out the liquid and then wash it back into the surgical wound, increasing the probability of secondary infection; the flow rate of the irrigation fluid can be achieved by presetting the size of the radial gap 6 between the aspiration tube 3 and the irrigation tube 4 according to the surgical needs, and it will not have any impact on the aspiration function; an aspiration pressure adjustment hole 38 is provided on the handle 33, and stepless adjustment of the aspiration pressure can be achieved; a water control device 48 with a mechanical spring mechanism 139 is provided on the handle 33, whereby instantaneous connection and disconnection of the irrigation hose 47 and then the irrigation branch 44 can be achieved without adding additional special equipment, and the operation is easy, fast and reliable; the outer peripheral sharp edges of the front end faces of the aspiration tube 3 and the irrigation tube 4 are all rounded and dulled to prevent tissue laceration; an inward curled edge 5 is also provided at the orifice of the aspiration tube 3 to prevent tissue scratching; since the diameter or volume of the part of the irrigation, aspiration and drainage instrument 1 that enters the human body is smaller, more instruments can be used simultaneously in the surgical wound channel during the operation; the irrigation, aspiration and drainage instrument 1 is hermetically and aseptically connected, reducing the probability of infection; the finger pinching surface of the handle 33 is designed in a streamline shape, fully meeting the requirements of ergonomics; most of the components of the irrigation, aspiration and drainage instrument 1 are made of plastic, with low cost. The irrigation, aspiration and drainage instrument 1 is for single use only, eliminating the risk of cross-infection caused by repeated use; the tube assembly 2 can be detachably connected to the handle 33, facilitating the replacement of other specifications of the tube assembly 2 during the operation or before the operation, such as a tube assembly 2 with a longer, shorter, thicker, thinner, more curved and / or straighter irrigation tube 4 and aspiration tube 3; the threaded connection between the tube assembly 2 and the handle 33 ensures that the two do not loosen from each other during the operation, ensuring the accuracy of the operation; the tube assembly 2 including the irrigation tube 4, the aspiration tube 3 and the composite tube fixing seat 7 is independently provided and self-contained, and different tube assemblies 2 can be designed in various diameter or length specifications, and during the operation, different diameter or length specifications can be replaced according to the surgical needs to meet the clinical surgical requirements.

[0108] Finally, it should be pointed out that the above-mentioned various embodiments are only used to understand and explain the present invention, and do not constitute a limitation on the protection scope of the present invention. For those skilled in the art, modifications can be made on the basis of the above embodiments, and all these modifications do not depart from the protection scope of the present invention.

Claims

1. A tube assembly for a surgical irrigation, aspiration and drainage instrument, the tube 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 tube assembly includes a suction tube, a flushing tube nested with the suction tube, and a tube fixing base. The tube assembly can be detachably connected to the surgical flushing, suction and drainage instrument by means of the tube fixing base. Among them, the tube fixing base has a suction tube fixing base section and a flushing tube fixing base section. The tube fixing base is fixed to the suction tube via the suction tube fixing base section and is fixed to the flushing tube via the flushing tube fixing base section. Among them, the suction tube fixing base section and the flushing tube fixing base section are integrally formed.

2. The pipe assembly according to claim 1, wherein The tube fixing base is provided with an external thread, and the tube fixing base can be detachably connected to the surgical flushing, suction and drainage instrument in a threaded connection manner with its external thread.

3. The pipe assembly according to claim 2, wherein The tube fixing base is provided with a surface structure facilitating force application and screwing on its outer periphery, distal to its external thread. In the installed state of the tube assembly, the surface structure can be grasped by an operator.

4. The tube assembly according to claim 1, characterized in that, The tube fixing base has a liquid inlet section, which is arranged between the suction tube fixing base section and the flushing tube fixing base section. The liquid inlet section has a radially extending liquid inlet hole, and the flushing liquid can enter the radially inner side of the liquid inlet section from the radially outer side of the liquid inlet section by means of the liquid inlet hole.

5. The pipe assembly according to claim 4, wherein The flushing tube is sleeved on the suction tube, and the flushing tube fixing base section is arranged distal to the suction tube fixing base section. Among them, the flushing liquid can enter the liquid inlet space formed by the inner surface of the liquid inlet section and the outer surface of the suction tube from the radially outer side of the liquid inlet section by means of the liquid inlet hole, and the liquid inlet space is in fluid communication with the radial gap between the suction tube and the flushing tube.

6. The pipe assembly according to claim 4, wherein The liquid inlet section is provided with a circumferentially extending guiding groove on its outer periphery, and the guiding groove extends through and intersects with the liquid inlet hole.

7. The pipe assembly according to claim 4, wherein The tube fixing base is provided with an external thread on its outer periphery, distal to the liquid inlet hole.

8. The pipe assembly according to claim 1, wherein, The suction tube fixing base section has a suction tube axial limiting step, and the suction tube is provided with a surface structure on the outer peripheral surface of its proximal end. The suction tube can be axially stopped on the radially extending step surface of the suction tube axial limiting step by means of its surface structure.

9. A tube component kit, characterized in that, The tube assembly kit includes at least two tube assemblies according to any one of claims 1 to 8. Among them, different tube assemblies are different from each other in terms of the length and / or diameter and / or curvature of their suction tubes and / or flushing tubes.

10. A surgical irrigation, aspiration and drainage instrument, characterized in that, The surgical flushing, suction and drainage instrument includes: a handle that can be held by an operator during surgery; and a tube assembly according to any one of claims 1 to 8 or a tube assembly kit according to claim 9, and each tube assembly of the tube assembly or the tube assembly kit can be detachably connected to the handle.

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