Medical multi-window negative pressure suction instrument

Abstract

The utility model relates to the technical field of medical equipment, and discloses a medical multi-window negative-pressure suction instrument which comprises a negative-pressure device, a suction tube, a suction tube and a suction tube. One end of the instrument body is fixedly connected with the operating handle, a backflow channel is defined in the instrument body, and the instrument body is communicated with the negative pressure device; the cutting piece extends into the instrument body; wherein a plurality of receding holes are formed in the peripheral wall of the instrument body, the receding holes are sequentially distributed in the axial direction of the instrument body, and the receding holes are used for enabling an object to stretch into the backflow channel from the receding holes to be right opposite to the cutting piece. The multiple avoiding holes are formed in the peripheral wall of the instrument body, a user can penetrate the biological tissue into the appropriate avoiding holes according to the cutting requirement, the cutting piece can cut the biological tissue stretching into the instrument body from the multiple avoiding holes at the same time, the distance between the biological tissue and the cutting piece can be accurately adjusted, and the cutting efficiency is improved. And the cutting efficiency of the medical multi-window negative pressure suction instrument can also be improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a medical multi-window negative pressure suction device. Background Technology

[0002] In surgical procedures, medical negative pressure suction devices are equipped with cutting components such as water jets and laser emission modules. These devices not only aspirate biological tissue from the surgical area but also remove it. For example, when a medical negative pressure suction device is equipped with a water jet, the water jet cuts the biological tissue using a high-pressure water stream. Due to its advantages of minimal trauma, less bleeding, and high selectivity for biological tissue, medical negative pressure suction devices equipped with water jets are widely used in surgical procedures involving the removal of biological tissue.

[0003] Currently, in existing medical negative pressure suction devices, after the cutting element is aligned with the biological tissue to be removed, the energy jet generated by the cutting element (such as a cutting medium or laser) cuts the biological tissue from the affected area. Then, the return channel of the medical negative pressure suction device sucks the removed biological tissue and other objects from the surgical area. Because an increased distance between the cutting element and the biological tissue leads to energy jet dispersion and reduced energy, the cutting effect of the medical negative pressure suction device on the biological tissue is affected. The distance between the cutting element and the biological tissue in existing medical negative pressure suction devices needs to be visually determined and adjusted by the user, resulting in lower cutting precision. This leads to an uneven surface of the remaining biological tissue in the surgical area, requiring the user to repeatedly trim the surface, thus prolonging the operation time.

[0004] Furthermore, the cutting area of ​​existing medical negative pressure suction devices is located outside the device itself. In order to ensure that the reflux channel can promptly absorb and recover the detached biological tissues and other objects, the distance between the existing cutting components and the inlet end of the reflux channel is relatively small. This results in a small cutting area for the medical negative pressure suction device, leading to low cutting efficiency and affecting the operation time. Utility Model Content

[0005] The purpose of this application is to precisely adjust the distance between biological tissue and the cutting component, thereby improving the cutting efficiency of medical negative pressure suction devices and reducing surgical time.

[0006] To achieve the above objectives, this application provides a medical multi-window negative pressure suction device.

[0007] The medical multi-window negative pressure suction device according to this application includes: a negative pressure device; a device body and an operating handle, wherein the device body is tubular, with one end being a fixed end fixedly connected to the operating handle and the other end being a free end; a return channel extending along the axial direction of the device body is defined within the device body, and the fixed end of the device body is connected to the negative pressure device to generate negative pressure within the return channel; a cutting element extending into the device body and used to cut an object within the return channel; wherein the outer peripheral wall of the device body is provided with a plurality of clearance holes communicating with the return channel, the plurality of clearance holes being arranged sequentially along the axial direction of the device body and spaced apart from the cutting element, the clearance holes being used to avoid the object to be cut, so that the object to be cut extends into the return channel through the clearance holes and faces the cutting element.

[0008] According to the medical multi-window negative pressure suction device of this application, by setting multiple clearance holes on the outer peripheral wall of the device body, the user can insert biological tissue into the appropriate clearance hole according to the cutting requirements. Then the cutting component can cut the biological tissue at the corresponding clearance hole. The cutting component can cut biological tissue extending into the device body from multiple clearance holes at the same time. Compared with the prior art, by selecting appropriate clearance holes, the distance between biological tissue and cutting component can be precisely adjusted, which can also improve the cutting efficiency of the medical multi-window negative pressure suction device and reduce the operation time.

[0009] In some examples of this application, the cutting component is constructed as a spray pipe, one end of which is constructed as a spray end with a spray nozzle. The spray end is located near the free end of the instrument body and extends into the return channel. The spray pipe is connected to a liquid supply source to obtain a cutting medium. The spray pipe is used to spray the cutting medium from the free end to the fixed end of the instrument body through the spray nozzle along the return channel. The spray pipe includes an inlet pipe section, a connecting pipe section, and a spray pipe section connected in sequence. The inlet pipe section and the spray pipe section both extend along the axial direction of the instrument body and are parallel to each other. The inlet pipe section is spaced apart from the clearance hole. The spray nozzle is located at the end of the spray pipe section near the operating handle. The end of the inlet pipe section near the operating handle is adapted to be connected to the liquid supply source to obtain a cutting medium. The connecting pipe section is bent and connected between the other end of the inlet pipe section and the other end of the spray pipe section.

[0010] In some examples of this application, the free end of the instrument body is provided with a tapered portion protruding away from the instrument body, and the inner peripheral wall of the tapered portion is provided with a limiting arc surface, which is in a stop-fitting engagement with the connecting pipe section.

[0011] In some examples of this application, the spray tube further includes a guide tube section, which is connected to the end of the inlet tube section near the operating handle. The guide tube section extends out of the return channel from the fixed end of the instrument body. The operating handle has an installation groove on its end wall near the instrument body, and a first communication channel is defined within the operating handle. The operating handle is adapted to allow the liquid supply source to extend into it. One end of the first communication channel is connected to the installation groove, and the other end is opposite to the liquid supply source. The fixed end of the instrument body is inserted into the installation groove, and the guide tube section passes through the first communication channel to connect and cooperate with the liquid supply source.

[0012] In some examples of this application, the operating handle has a mounting groove on the end wall near the instrument body, a second communication channel is defined inside the operating handle, the operating handle is adapted to allow the negative pressure device to extend into it, one end of the second communication channel is connected to the mounting groove and the other end is opposite to and connected to the negative pressure device, the fixed end of the instrument body is inserted into the mounting groove, the fixed end of the instrument body has a liquid outlet, and the liquid outlet is opposite to and connected to the second communication channel.

[0013] In some examples of this application, the total flow area of ​​the plurality of clearance holes is S1, and the cross-sectional area of ​​the return channel is S2. S1 and S2 satisfy the relationship: 0.2S2≤S1≤0.6S2.

[0014] In some examples of this application, the clearance hole is constructed as a circular hole, an elliptical hole, or a square hole, and / or, the radial dimension of each clearance hole is D1, where D1 satisfies the relationship: 0.5mm≤D1≤3mm.

[0015] In some examples of this application, the inner diameter of the instrument body is D2, the minimum distance between the clearance hole and the spray nozzle is L1, and the maximum distance between the clearance hole and the spray nozzle is L2. D2, L1, and L2 satisfy the following relationships: D2≤L1≤3D2; L2≤10D2; and L1≤L2.

[0016] In some examples of this application, the distance between two adjacent clearance holes gradually increases from the fixed end to the free end of the device body.

[0017] In some examples of this application, the interval between any two adjacent clearance holes is L3, the number of clearance holes between the one closer to the liquid spray nozzle and the liquid spray nozzle in the two corresponding clearance holes is n, the initial interval between two adjacent clearance holes is L4, and the incremental interval between the clearance holes is ΔL. L3, n, L4, and ΔL satisfy the following relationship: L3=L4+nΔL; where 5mm≤L4≤8mm, 2mm≤ΔL≤3mm. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the medical multi-window negative pressure suction device described in the embodiments of this application;

[0019] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is a bottom view of the medical multi-window negative pressure suction device described in the embodiments of this application.

[0021] In the image, 100 is a medical multi-window negative pressure suction device.

[0022] 1. Instrument body; 11. Return channel; 12. Clearance hole; 13. Conical part; 14. Limiting arc surface;

[0023] 2. Operating handle; 21. Mounting slot; 22. First connecting channel; 23. Second connecting channel;

[0024] 3. Spray pipe; 31. Spray nozzle; 32. Inlet pipe section; 33. Connecting pipe section; 34. Spray pipe section; 35. Guide pipe section;

[0025] 4. Liquid supply source; 5. Negative pressure device. Detailed Implementation

[0026] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0027] This application discloses a medical multi-window negative pressure suction device 100, which is used to aspirate biological tissue cut in a surgical area and to cut biological tissue, wherein the biological tissue to be cut can be adipose tissue, etc.

[0028] like Figures 1-3 As shown, the medical multi-window negative pressure suction device 100 according to the embodiments of this application includes: a negative pressure device 5, a device body 1, an operating handle 2, and a cutting component (not shown in the figure). The device body 1 is tubular in shape, with one end being a fixed end fixedly connected to the operating handle 2, and the other end being a free end extending away from the operating handle 2. The user can operate the medical multi-window negative pressure suction device 100 by gripping the operating handle 2. A return channel 11 extending along the axial direction of the device body 1 is defined within the device body 1. It should be noted that the axial direction of the device body 1 can refer to... Figure 1 The left and right directions within. The fixed end of the device body 1 (i.e. Figure 1 The right end of the instrument body 1 (the end connected to the operating handle 2) is adapted to communicate with the negative pressure device 5 so that negative pressure is generated in the return channel 11. The negative pressure device 5 can suck up the object in the return channel 11, and the closer it is to the fixed end of the instrument body 1, the lower the pressure in the return channel 11.

[0029] Furthermore, the cutting element extends into the instrument body 1 and is used to cut objects within the return channel 11. In some specific embodiments, the cutting element can be configured as a spray pipe 3, which cuts the object by spraying a cutting medium, such as water, saline solution, or disinfectant (e.g., alcohol). However, this application is not limited to this. For example, the cutting element can also be configured as a laser emitting module. When the cutting element is configured as a laser emitting module, the laser emitting module generates a laser to cut the object.

[0030] Furthermore, such as Figure 1 , Figure 3 As shown, the outer peripheral wall of the instrument body 1 is provided with multiple clearance holes 12 that communicate with the reflux channel 11. Under the action of negative pressure inside the instrument body 1, objects (such as adipose tissue or other biological tissues) around the clearance holes 12 can be drawn into the instrument body 1. The multiple clearance holes 12 are arranged sequentially along the axial direction of the instrument body 1 and are spaced apart from the cutting component. The clearance holes 12 are used to avoid the object to be cut, so that the object to be cut extends into the reflux channel 11 through the clearance holes 12 and faces the cutting component (i.e., the spray pipe 3 or the laser emission module, etc.). Specifically, when the cutting component is constructed as the spray pipe 3, the object to be cut extends into the reflux channel 11 through the clearance holes 12 and faces the spray port 31 of the spray pipe 3. When the cutting component is constructed as the laser emission module, the object to be cut extends into the reflux channel 11 through the clearance holes 12 and faces the laser emission port of the laser emission module. The following description uses the cutting component structure as the spray tube 3 to illustrate this application. It should be understood that the structure of the medical multi-window negative pressure suction device 100 when the cutting component structure is a laser emission module is the same as the structure when the cutting component structure is the spray tube 3.

[0031] Among them, such as Figure 1 As shown, after the cutting medium is sprayed out from the spray nozzle 31, by setting the object to be cut directly opposite the spray nozzle 31, the object to be cut can be positioned on the spray path of the cutting medium. The cutting medium contacts the object to be cut and cuts the object. Under the action of negative pressure, the cut object and the cutting medium are moved out of the fixed end of the instrument body 1, thereby cleaning the inside of the instrument body 1.

[0032] By setting multiple clearance holes 12, any object extending into the device body 1 through any clearance hole 12 can be cut by the cutting medium. Furthermore, by arranging the multiple clearance holes 12 sequentially along the axial direction of the device body 1, the interval between at least two clearance holes 12 and the spray nozzle 31 is not equal. Thus, the interval between the object extending into the device body 1 through the corresponding two clearance holes 12 and the spray nozzle 31 is not equal. The cutting effect on the object extending into the device body 1 through different clearance holes 12 is different. Moreover, the smaller the interval between the clearance hole 12 and the spray nozzle 31, the higher the cutting strength of the medical multi-window negative pressure suction device 100, and the easier it is for the medical multi-window negative pressure suction device 100 to cut objects with high toughness.

[0033] Since the position of the clearance hole 12 on the instrument body 1 is fixed, the distance between the clearance hole 12 and the spray nozzle 31 does not change. Under stable operating conditions, the cutting effect produced by the cutting medium at the corresponding clearance hole 12 is basically the same. During the operation, the user can select the appropriate clearance hole 12 according to the cutting needs to control the cutting effect of the medical multi-window negative pressure suction instrument 100, thereby improving the cutting accuracy of the medical multi-window negative pressure suction instrument 100. It is also easier for the user to trim the surface of biological tissue and reduce the operation time.

[0034] Furthermore, the cutting medium can simultaneously cut the object to be cut that extends into the instrument body 1 from multiple clearance holes 12, which can speed up the cutting efficiency of the medical multi-window negative pressure suction device 100, thereby further reducing the operation time and improving the product quality of the medical multi-window negative pressure suction device 100.

[0035] like Figure 1 As shown, in some embodiments of this application, when the cutting component is constructed as a spray pipe 3, one end of the spray pipe 3 is constructed as a spray end, and the spray end is provided with a spray nozzle 31. The spray end is close to the free end of the instrument body 1 (i.e., Figure 1 The instrument body 1 is located at its left end and extends into the return channel 11. The spray pipe 3 is connected to the liquid supply source 4 to obtain the cutting medium. The spray pipe 3 is used to spray the cutting medium from the free end to the fixed end of the instrument body 1 through the spray nozzle 31 along the return channel 11. This arrangement allows the cutting medium to move along the airflow direction inside the instrument body 1 after being sprayed from the spray nozzle 31, making it easier for the negative pressure device 5 to recover the cutting medium, thereby reducing the residue of the cutting medium in the surgical area.

[0036] The spray pipe 3 includes an inlet pipe section 32, a connecting pipe section 33, and a spray pipe section 34 connected in sequence. Both the inlet pipe section 32 and the spray pipe section 34 extend axially along the instrument body 1, and are spaced apart circumferentially within the return channel 11. In some specific embodiments, such as... Figure 1 As shown, the inlet pipe section 32 and the spray pipe section 34 are respectively located on both sides of the central axis of the instrument body. That is to say, both the inlet pipe section 32 and the spray pipe section 34 occupy the space inside the instrument body 1, which can make full use of the space inside the instrument body 1 and make the structure on the outside of the instrument body 1 simpler. The inlet pipe section 32 is spaced apart from the clearance hole 12. This can prevent the inlet pipe section 32 from affecting the insertion of items into the clearance hole 12, and can also prevent the inlet pipe from affecting the effect of the negative pressure device 5 in sucking out the objects inside the instrument body 1.

[0037] Furthermore, the end of the spray pipe section 34 near the operating handle 2 is provided with a spray nozzle 31. In some embodiments, the central axis of the inlet pipe section 32 is arranged parallel to the central axis of the instrument body 1. In other embodiments, the central axis of the inlet pipe section 32 is at an angle to the central axis of the instrument body 1, and the spray nozzle 31 faces inward toward the instrument body 1. This arrangement can ensure that the cutting medium is not likely to come into contact with the inner peripheral wall of the clearance hole 12 after being sprayed out from the spray nozzle 31, and can minimize the splashing of the cutting medium.

[0038] One end of the inlet pipe section 32 near the operating handle 2 is adapted to connect with the liquid supply source 4 to obtain the cutting medium. The connecting pipe section 33 is bent and connected between the other end of the inlet pipe section 32 and the other end of the spray pipe section 34. The cutting medium can flow sequentially along the inlet pipe section 32, the connecting pipe section 33, and the spray pipe section 34, be rectified, and then sprayed out from the spray nozzle 31. In some preferred embodiments, such as Figure 1 , Figure 2 As shown, the connecting pipe section 33 can be constructed as a U-shaped pipe, which can reduce the energy loss generated when the cutting medium flows from the inlet pipe section 32 to the spray pipe section 34, thereby improving the object cutting effect of the medical multi-window negative pressure suction device 100.

[0039] like Figure 1 , Figure 2 As shown, in some embodiments of this application, the free end of the device body 1 may be provided with a conical portion 13 protruding away from the device body 1. The inner peripheral wall of the conical portion 13 is provided with a limiting arc surface 14, which abuts against the connecting pipe section 33. The shape of the limiting arc surface 14 matches the shape of the connecting pipe section 33, thereby increasing the contact area between the limiting arc surface 14 and the connecting pipe section 33. After the limiting arc surface 14 abuts against the connecting pipe section 33, the limiting arc surface 14 can prevent the spray tube 3 from moving towards the fixed end away from the device body 1, thereby ensuring that the distance between the spray nozzle 31 and the clearance hole 12 does not change, and improving the working stability of the medical multi-window negative pressure suction device 100.

[0040] like Figure 1As shown, in some embodiments of this application, the spray tube 3 further includes a guide tube section 35, which is connected to the end of the inlet tube section 32 near the operating handle 2. The guide tube section 35 extends out of the return channel 11 from the fixed end of the instrument body 1. In some preferred embodiments, the fixed end wall of the instrument body 1 may be provided with an outlet, and the object sucked by the negative pressure device 5 may be discharged out of the instrument body 1 from the outlet. The guide tube section 35 may extend out of the return channel 11 from the outlet. Of course, in other embodiments, the outer peripheral wall of the instrument body 1 may be provided with a connecting hole, which communicates with the return channel 11 and is located near the fixed end of the instrument body 1. The guide tube section 35 may extend out of the instrument body 1 from the connecting hole.

[0041] An installation groove 21 can be provided on the end wall of the operating handle 2 near the instrument body 1. A first connecting channel 22 is defined within the operating handle 2. The operating handle 2 is adapted to allow the liquid supply source 4 to extend into it. One end of the first connecting channel 22 is connected to the installation groove 21, and the other end is positioned opposite to the liquid supply source 4. When the guide tube section 35 extends out of the return channel 11 from the outlet, the first connecting channel 22 is positioned opposite to the outlet. When the guide tube section 35 extends out of the connecting hole to the outside of the instrument body 1, the connecting hole is located within the installation groove 21, and the first connecting channel 22 is positioned opposite to the connecting hole. The fixed end of the instrument body 1 is inserted into the installation groove 21 to achieve a fixed connection between the instrument body 1 and the operating handle 2. The guide tube section 35 passes through the first connecting channel 22 to connect and cooperate with the liquid supply source 4. Thus, the guide tube section 35 achieves the technical effect of connecting the spray pipe 3 and the liquid supply source 4.

[0042] like Figure 1 , Figure 3 As shown, in some embodiments of this application, a second communication channel 23 is defined within the operating handle 2. The operating handle 2 is adapted to allow the negative pressure device 5 to extend into it. One end of the second communication channel 23 is connected to the mounting groove 21, and the other end is opposite to and connected to the negative pressure device 5. The fixed end of the device body 1 is inserted into the mounting groove 21. The fixed end of the device body 1 is provided with a liquid outlet, which is opposite to and connected to the second communication channel 23. The second communication channel 23 can be located at the bottom of the mounting groove 21. By setting the second communication channel 23 within the operating handle 2, the technical effect of connecting the negative pressure device 5 with the device body 1 is achieved. Furthermore, this arrangement eliminates the need for additional connecting pipes between the negative pressure device 5 and the device body 1, simplifying the structure of the medical multi-window negative pressure suction device 100.

[0043] In some embodiments of this application, the total flow area of ​​the plurality of clearance holes 12 is S1, and the cross-sectional area of ​​the return channel 11 is S2. It should be noted that the cross-section of the return channel 11 is perpendicular to the central axis of the instrument body 1. S1 and S2 satisfy the relationship: 0.2S2≤S1≤0.6S2. When the total flow area S1 of the plurality of clearance holes 12 is too small, the cutting medium is difficult to flow from the spray port 31 to the fixed end of the instrument body 1, which will also affect the negative pressure suction efficiency of the medical multi-window negative pressure suction device 100.

[0044] When the total flow area S1 of the multiple clearance holes 12 is too large, it is difficult to establish a negative pressure environment in the return channel 11, which is detrimental to the aspiration of biological tissue by the medical multi-window negative pressure suction device 100. Therefore, by making the total flow area S1 of the multiple clearance holes 12 20% to 60% of the cross-sectional area S2 of the return channel 11, the ratio between the total flow area S1 of the multiple clearance holes 12 and the cross-sectional area S2 of the return channel 11 can be made more reasonable. This ensures smooth flow of the cutting medium in the return channel 11 and facilitates the establishment of a negative pressure environment within the return channel 11. For example, in some specific embodiments, when the inner diameter D2 of the device body 1 is 5 mm, the cross-sectional area S2 of the return channel 11 is 19.63 mm². 2 At this time, the total flow area S1 of the multiple clearance holes 12 can be 3.93mm. 2 ~11.78mm 2 Choose from among them.

[0045] In some preferred embodiments, S1 and S2 satisfy the relationship: 0.3S2≤S1≤0.5S2.

[0046] Furthermore, such as Figure 3 As shown, the clearance hole 12 is constructed as a round hole, an elliptical hole or a square hole, and / or, the radial dimension of each clearance hole 12 is D1, and D1 satisfies the relationship: 0.5mm≤D1≤3mm.

[0047] The different shapes of the clearance hole 12 can alter the shape of the object being cut as it extends into the return channel 11, thereby adjusting the cutting and suction effects of the medical multi-window negative pressure suction device 100. Specifically, when the clearance hole 12 is circular, the flow of the cutting medium through it is more uniform. When the clearance hole 12 is elliptical, the cutting force on the object being cut is more suitable at certain angles, thus improving the cutting effect of the medical multi-window negative pressure suction device 100.

[0048] When the clearance hole 12 is constructed as a square hole, it can be either a square or rectangular hole. A square hole allows for a larger volume of objects to pass through it, resulting in higher cutting efficiency for the medical multi-window negative pressure suction device 100. This allows the medical multi-window negative pressure suction device 100 to quickly cut larger areas of biological tissue. Of course, in some embodiments, clearance holes 12 of different shapes can be combined and arranged on the device body 1 to give the device body 1 better performance.

[0049] Furthermore, the radial dimension D1 of each clearance hole 12 is related to the jet pressure, jet velocity, and type of object being cut by the medical multi-window negative pressure suction device 100. Specifically, when the jet pressure of the medical multi-window negative pressure suction device 100 is too high, reducing the radial dimension D1 of the clearance hole 12 can minimize the cutting force of the cutting medium, thus preventing severe damage to biological tissue. When the jet velocity of the medical multi-window negative pressure suction device 100 is too high, increasing the radial dimension D1 of the clearance hole 12 can increase the flow rate of the cutting medium in the return channel 11, thereby minimizing the residue of the cutting medium in the surgical area. When the medical multi-window negative pressure suction device 100 is used to cut adipose tissue, increasing the radial dimension D1 of the clearance hole 12 can improve the suction efficiency of the medical multi-window negative pressure suction device 100. When the medical multi-window negative pressure suction device 100 is used to cut muscle tissue, by reducing the radial dimension D1 of the clearance hole 12, the cutting force of the cutting medium can be more easily controlled, thereby improving the cutting accuracy of the medical multi-window negative pressure suction device 100.

[0050] Therefore, by setting the radial dimension D1 of each clearance hole 12 to 0.5mm to 3mm, the medical multi-window negative pressure suction device 100 not only has good cutting efficiency but also good cutting accuracy, and can also improve the user experience. Furthermore, in some embodiments, the radial dimension D1 of any two clearance holes 12 is the same; in other embodiments, the radial dimension D1 of at least two clearance holes 12 is different. This arrangement allows the medical multi-window negative pressure suction device 100 to be applicable to different surgical environments, thus improving its applicability.

[0051] In some specific embodiments of this application, when the medical multi-window negative pressure suction device 100 is used to cut adipose tissue, the radial dimension D1 of each clearance hole 12 can be set to 1mm to 3mm. In some more preferred embodiments, the radial dimension D1 of each clearance hole 12 can be set to 1.5mm to 2.5mm. When the medical multi-window negative pressure suction device 100 is used to cut muscle tissue, the radial dimension D1 of each clearance hole 12 can be set to 0.5mm to 1.5mm. In some more preferred embodiments, the radial dimension D1 of each clearance hole 12 can be set to 0.8mm to 1.2mm.

[0052] In some specific embodiments of this application, the radial dimension D1 of the clearance hole 12 gradually increases from the end of the device body 1 near the spray port 31 to the end away from the spray port 31. Specifically, at the end of the device body 1 near the spray port 31, the pressure and velocity of the cutting medium are higher. By reducing the radial dimension D1 of the clearance hole 12, the cutting medium jet ejected from the spray port 31 can be made more concentrated, enhancing the cutting force of the cutting medium jet, thereby enabling the medical multi-window negative pressure suction device 100 to precisely cut tissue.

[0053] At the end of the device body 1 furthest from the spray port 31, the pressure and speed of the cutting medium decrease. By increasing the radial dimension D1 of the clearance hole 12, the medical multi-window negative pressure suction device 100 can ensure good fluid throughput and negative pressure attraction at the clearance hole 12, thereby enabling the medical multi-window negative pressure suction device 100 to effectively aspirate the cut biological tissue.

[0054] Furthermore, such as Figure 2 As shown, the inner diameter of the device body 1 is D2. The minimum distance between the clearance hole 12 and the spray nozzle 31 is L1, and the maximum distance between the clearance hole 12 and the spray nozzle 31 is L2. D2, L1, and L2 satisfy the following relationships: D2≤L1≤3D2; L2≤10D2; and L1≤L2. Among the multiple clearance holes 12, the clearance hole 12 closest to the spray nozzle 31 has the smallest distance from the spray nozzle 31, and the clearance hole 12 furthest from the spray nozzle 31 has the largest distance from the spray nozzle 31.

[0055] When the minimum distance L1 between the clearance hole 12 and the spray nozzle 31 is too small, the cutting medium ejected from the spray nozzle 31 will directly impact the inner wall of the clearance hole 12, easily causing the cutting medium to splash at the clearance hole 12, thus affecting the surgical field of view and the operational accuracy of the medical multi-window negative pressure suction device 100. When the minimum distance L1 between the clearance hole 12 and the spray nozzle 31 is too large, the cutting medium ejected from the spray nozzle 31 will lose too much energy before reaching the clearance hole 12 closest to the spray nozzle 31, thus affecting the weakening cutting effect of the medical multi-window negative pressure suction device 100. Therefore, by setting the minimum distance L1 between the clearance hole 12 and the spray nozzle 31 to 1 to 3 times the inner diameter D2 of the device body 1, the energy of the cutting medium ejected from the spray nozzle 31 before reaching the clearance hole 12 closest to the spray nozzle 31 can be more appropriate, and splashing of the cutting medium at the clearance hole 12 can be minimized.

[0056] Furthermore, when the maximum distance L2 between the clearance hole 12 and the spray nozzle 31 is too large, it is difficult to form negative pressure at the clearance hole 12 closest to the spray nozzle 31 among the multiple clearance holes 12. This reduces the effectiveness of the medical multi-window negative pressure suction device 100 in suctioning objects (such as cut biological tissue and cutting media), and may easily cause residual biological tissue and cutting media in the surgical area. By setting the maximum distance L2 between the clearance hole 12 and the spray nozzle 31 to no more than 10 times the inner diameter D2 of the device body 1, the maximum distance L2 between the clearance hole 12 and the spray nozzle 31 can be made more suitable, which can improve the user experience of the medical multi-window negative pressure suction device 100.

[0057] Furthermore, in some preferred embodiments, in order to achieve significant differences in cutting effect at different avoidance holes 12 in the medical multi-window negative pressure suction device 100, the maximum distance L2 between the avoidance hole 12 and the spray nozzle 31 satisfies the relationship: 8D2≤L2≤10D2. In addition, by reducing the distance L2 between the avoidance hole 12 furthest from the spray nozzle 31 and the spray nozzle 31, the resistance experienced by the cutting medium can be reduced. Furthermore, when there is a large amount of residual biological tissue in the surgical area, by increasing the maximum distance L2 between the avoidance hole 12 and the spray nozzle 31, the distance between the avoidance hole 12 furthest from the spray nozzle 31 and the negative pressure device 5 can be reduced, thereby improving the suction efficiency of the medical multi-window negative pressure suction device 100.

[0058] like Figure 2As shown, in some embodiments of this application, the interval between any two adjacent clearance holes 12 is L3, the number of clearance holes 12 between the one closest to the spray nozzle 31 and the spray nozzle 31 is n, and the initial interval between two adjacent clearance holes 12 is L4. It should be noted that the initial interval L4 between two adjacent clearance holes 12 is the interval between the clearance hole 12 closest to the spray nozzle 31 and the adjacent clearance hole 12. The incremental interval distance of the clearance holes 12 is ΔL, and L3, n, L4, and ΔL satisfy the relationship: L3=L4+nΔL; where 5mm≤L4≤8mm, 2mm≤ΔL≤3mm. That is, from the end of the device body 1 closest to the spray nozzle 31 to the end furthest from the spray nozzle 31, that is, from the fixed end to the free end of the device body 1, the interval between two adjacent clearance holes 12 gradually increases.

[0059] At the end of the instrument body 1 near the spray nozzle 31, the energy of the cutting medium is more concentrated. By making the avoidance holes 12 more densely arranged, the impact force of the cutting medium can be applied to the biological tissue more evenly, thereby improving the cutting uniformity of the medical multi-window negative pressure suction instrument 100 in the surgical area.

[0060] At the end of the device body 1 furthest from the nozzle 31, the energy of the cutting medium gradually disperses. By making the avoidance holes 12 more loosely arranged, interference between the cutting medium and adjacent avoidance holes 12 when cutting biological tissue can be minimized. This ensures that the medical multi-window negative pressure suction device 100 has a good cutting effect at each avoidance hole 12. Therefore, by gradually increasing the spacing between adjacent avoidance holes 12 from the end of the device body 1 closest to the nozzle 31 to the end furthest from the nozzle 31, the cutting and suction effects of the medical multi-window negative pressure suction device 100 at each avoidance hole 12 can be improved, thus enabling the medical multi-window negative pressure suction device 100 to meet the cutting needs of biological tissues in different locations.

[0061] like Figures 1-3 As shown, in some embodiments of this application, the number of clearance holes 12 is 2 to 10. When the number of clearance holes 12 is less than 2, the medical multi-window negative pressure suction device 100 cannot achieve the technical effect of using multiple clearance holes 12 to precisely adjust the distance between biological tissue and the spray nozzle 31, and improve the cutting efficiency of the medical multi-window negative pressure suction device 100.

[0062] When there are too many clearance holes 12, the maximum distance between the spray nozzle 31 and the clearance holes 12 becomes too long. This causes the cutting medium to travel too far after being sprayed from the spray nozzle 31, reducing its cutting force and affecting the object cutting effect of the medical multi-window negative pressure suction device 100. Furthermore, an excessive number of clearance holes 12 makes it difficult to maintain the negative pressure environment within the return channel 11, resulting in the inability to promptly remove cut biological tissue and cutting medium from the surgical area, thus impacting the user experience of the medical multi-window negative pressure suction device 100.

[0063] In some preferred embodiments, the number of clearance holes 12 can be 3 to 5. This arrangement can improve the cutting accuracy and efficiency of the medical multi-window negative pressure suction device 100, and also enable the medical multi-window negative pressure suction device 100 to have good water flow stability and negative pressure suction effect.

[0064] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A medical multi-window negative pressure suction device, characterized in that, include: Negative pressure device; The instrument body and the operating handle are provided. The instrument body is tubular in shape, with one end being a fixed end that is fixedly connected to the operating handle and the other end being a free end. A return channel is defined within the instrument body and extends along the axial direction of the instrument body. The fixed end of the instrument body is connected to a negative pressure device to generate negative pressure in the return channel. A cutting element that extends into the instrument body and is used to cut objects within the return channel; The outer peripheral wall of the instrument body is provided with a plurality of clearance holes communicating with the return channel. The plurality of clearance holes are arranged sequentially along the axial direction of the instrument body and are spaced apart from the cutting component. The clearance holes are used to avoid the object to be cut, so that the object to be cut extends into the return channel from the clearance holes and faces the cutting component.

2. The medical multi-window negative pressure suction device according to claim 1, characterized in that, The cutting component is constructed as a liquid spraying pipe, one end of which is constructed as a liquid spraying end. The liquid spraying end is provided with a liquid spraying port. The liquid spraying end is located near the free end of the instrument body and extends into the return channel. The liquid spraying pipe is connected to a liquid supply source to obtain cutting medium. The liquid spraying pipe is used to spray cutting medium from the free end to the fixed end of the instrument body through the liquid spraying port along the return channel. The spray pipe includes an inlet pipe section, a connecting pipe section and a spray pipe section connected in sequence. The inlet pipe section and the spray pipe section both extend along the axial direction of the instrument body and are parallel to each other. The inlet pipe section is spaced apart from the clearance hole. The spray nozzle is located at one end of the spray pipe section near the operating handle. The inlet pipe section is adapted to be connected to the liquid supply source to obtain the cutting medium at one end of the inlet pipe section. The connecting pipe section is bent and connected between the other end of the inlet pipe section and the other end of the spray pipe section.

3. The medical multi-window negative pressure suction device according to claim 2, characterized in that, The free end of the instrument body is provided with a conical part that protrudes away from the instrument body, and the inner peripheral wall of the conical part is provided with a limiting arc surface, which is in a stop-fitting engagement with the connecting pipe section.

4. The medical multi-window negative pressure suction device according to claim 2, characterized in that, The spray tube also includes a guide tube section, which is connected to the end of the inlet tube section near the operating handle. The guide tube section extends out of the return channel from the fixed end of the instrument body. The operating handle has an installation groove on the end wall near the instrument body. A first communication channel is defined inside the operating handle. The operating handle is adapted to allow the liquid supply source to extend into it. One end of the first communication channel is connected to the installation groove and the other end is opposite to the liquid supply source. The fixed end of the instrument body is inserted into the installation groove. The guide tube section passes through the first communication channel to connect and cooperate with the liquid supply source.

5. The medical multi-window negative pressure suction device according to claim 1, characterized in that, The operating handle has a mounting groove on the end wall near the instrument body. A second communication channel is defined inside the operating handle. The operating handle is adapted to allow the negative pressure device to extend into it. One end of the second communication channel is connected to the mounting groove and the other end is opposite to and connected to the negative pressure device. The fixed end of the instrument body is inserted into the mounting groove. The fixed end of the instrument body has a liquid outlet, which is opposite to and connected to the second communication channel.

6. The medical multi-window negative pressure suction device according to claim 2, characterized in that, The total flow area of ​​the plurality of clearance holes is S1, and the cross-sectional area of ​​the return channel is S2. S1 and S2 satisfy the relationship: 0.2S2≤S1≤0.6S2.

7. The medical multi-window negative pressure suction device according to claim 2 or 6, characterized in that, The clearance hole is constructed as a circular hole, an elliptical hole, or a square hole, and / or, The radial dimension of each of the aforementioned clearance holes is D1, and D1 satisfies the relationship: 0.5mm≤D1≤3mm.

8. The medical multi-window negative pressure suction device according to claim 2, characterized in that, The inner diameter of the instrument body is D2, the minimum distance between the clearance hole and the spray nozzle is L1, and the maximum distance between the clearance hole and the spray nozzle is L2. D2, L1, and L2 satisfy the following relationships: D2≤L1≤3D2; L2≤10D2; and L1≤L2.

9. The medical multi-window negative pressure suction device according to claim 2, characterized in that, From the fixed end to the free end of the instrument body, the distance between two adjacent clearance holes gradually increases.

10. The medical multi-window negative pressure suction device according to claim 9, characterized in that, The interval between any two adjacent clearance holes is L3, the number of clearance holes between the one closer to the liquid spray nozzle and the liquid spray nozzle in the two corresponding clearance holes is n, the initial interval between two adjacent clearance holes is L4, and the incremental interval between the clearance holes is ΔL. L3, n, L4, and ΔL satisfy the following relationship: L3=L4+nΔL; where 5mm≤L4≤8mm, 2mm≤ΔL≤3mm.

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