Flexible ultrasonic knife with suction function

Abstract

The utility model discloses a flexible ultrasonic knife with a suction function, which relates to the technical field of ultrasonic knives and comprises a handle, a knife bar, a suction tube and a fixing device. The cutter bar is connected with the front end of the handle, and an elbow assembly is arranged at the front end of the cutter bar and connected with a cutter head. The suction tube is connected to the cutter bar in a sliding mode and can slide along the cutter bar, a plurality of suction holes are formed in the front portion of the peripheral wall of the suction tube, the suction tube is connected with a positioning device used for fixing the cutter bar, and the suction tube is connected with a negative pressure connecting tube used for connecting the suction tube with a negative pressure suction device. The fixing device is connected to the handle and used for fixing the negative pressure connecting pipe. According to the flexible ultrasonic knife, the flexible ultrasonic knife has a suction function, and a clear operation visual field can be obtained in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic scalpels, in particular to a flexible ultrasonic scalpel with a suction function. Background Art

[0002] At present, ultrasonic scalpels are widely used in open surgery and minimally invasive surgery. The working principle of ultrasonic scalpels is to convert electrical energy into mechanical energy of the metal probe (knife head) through a transducer (ultrasonic frequency generator), so that the knife head performs mechanical oscillation (amplitude of 50-100um) at an ultrasonic frequency (55.5kHz), which then vaporizes the liquid in the tissue, breaks the protein hydrogen chain and causes protein coagulation, and closes the blood vessels, achieving the effect of cutting and coagulation. Its advantages mainly lie in accurate cutting, controllable coagulation, no smoke, less eschar, and no conductive tissue damage. Flexible ultrasonic scalpels have greater freedom in a small space, making it easier to perform surgery in a small space. Although the existing flexible ultrasonic scalpel has many advantages, it still has some shortcomings. The shortcomings are: 1. When the blade head mechanically oscillates at ultrasonic frequency to cut tissue, it will generate very high heat at the cutting point, causing the surrounding liquid to vaporize. These vapors often cover the lens of the endoscope, thereby affecting the observation of the endoscope; 2. When there are many surgical materials (including coagulants, proteins, blood, tissue particles and other component fluids) near the blade head, these surgical materials will gradually solidify on the surface of the blade head as the temperature rises, thereby seriously affecting the efficiency of the blade head, and even causing the blade head to shut down due to excessive load. In addition, too much surgical material will also affect the observation field of the endoscope. Therefore, it is necessary to use an aspirator to extract the gas and liquid to provide a clear surgical field of view. However, it is difficult to arrange a flexible ultrasonic scalpel, a suction tube and an endoscope in a small space. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a flexible ultrasonic scalpel with a suction function, which can enable the flexible ultrasonic scalpel to have a suction function and obtain a clear surgical field of view in a narrow space.

[0004] According to the first aspect of the utility model, a flexible ultrasonic knife with a suction function includes: a handle, a knife rod, a suction tube, and a fixing device. The knife rod is connected to the front end of the handle, and the front end of the knife rod is provided with an elbow assembly, and the elbow assembly is connected to the knife head; the suction tube is slidably connected to the knife rod and can slide along the knife rod, and the front part of the outer peripheral wall of the suction tube is provided with a plurality of suction holes, and the suction tube is connected to a positioning device for fixing the knife rod, and the suction tube is connected to a negative pressure connecting tube for connecting the suction tube to a negative pressure suction device; the fixing device is connected to the handle and is used to fix the negative pressure connecting tube.

[0005] A flexible ultrasonic knife with a suction function according to an embodiment of the utility model has at least the following beneficial effects: by slidingly connecting the suction tube to the knife rod, the position of the suction hole can be conveniently adjusted to accurately extract the blood or smoke generated during the operation and prevent the suction tube from affecting the bending of the elbow assembly.

[0006] According to some embodiments of the utility model, the suction tube is a hose with a hollow flat arc-shaped cross-section, and the suction tube has a first opening through which the knife rod can be clamped, and the curvature of the first opening is 30° to 60°.

[0007] According to some embodiments of the present invention, a plurality of rows of protrusions extending along the length direction of the suction tube are arranged in the inner space of the suction tube.

[0008] According to some embodiments of the utility model, the positioning device includes a C-shaped connector and a positioning bead, the C-shaped connector is connected to the side of the suction tube away from the cutter head, the C-shaped connector is clamped on the cutter rod, the positioning bead is arranged on the inner side of the C-shaped connector, and the outer peripheral wall of the cutter rod is provided with a plurality of annular grooves spaced apart along the length direction of the cutter rod, and the positioning bead can be embedded in the corresponding annular groove to fix the C-shaped connector and the cutter rod.

[0009] According to some embodiments of the utility model, a plurality of guide strips are provided at the front end of the suction tube, and the suction hole is located between adjacent guide strips.

[0010] According to some embodiments of the utility model, the fixing device includes a fixing block and a fixing bolt, the fixing block is connected to the handle, a fixing hole is opened on the fixing block, the fixing hole is for the negative pressure connecting tube to pass through, the fixing bolt is threadedly connected to the fixing block, and the fixing bolt is used to tightly abut against the negative pressure connecting tube.

[0011] According to some embodiments of the present utility model, a lighting unit is provided at the front end of the suction tube.

[0012] According to some embodiments of the utility model, an optical fiber is passed through the suction tube and the negative pressure connecting tube, one end of the optical fiber is connected to the lighting part, and the other end is connected to the light source.

[0013] According to some embodiments of the utility model, the handle is connected to a power cord, and the negative pressure connecting tube is connected to the power cord via a buckle.

[0014] According to some embodiments of the present invention, the diameter of the outer wall of the suction tube is no greater than 9 mm.

[0015] A flexible ultrasonic scalpel with suction function according to an embodiment of the utility model has at least the following beneficial effects:

[0016] (1) The suction tube is slidably connected to the knife rod, and the position of the suction tube and the suction hole can be easily adjusted;

[0017] (2) The positioning beads can slide in the annular groove, and the blade will not drive the suction tube to rotate when it rotates;

[0018] (3) Use optical fiber light guide for illumination, providing a bright surgical field of view;

[0019] (4) The suction tube is connected to the knife rod by a snap-on method, which is easy to install and convenient for retrofitting to the existing flexible ultrasonic knife.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A schematic diagram of an installation structure of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle

[0024] Figure 3 for Figure 1 Enlarged view of point B

[0025] Figure 4 for Figure 1 Enlarged view of point C in the middle

[0026] Figure 5 A schematic diagram of a knife bar and a handle according to an embodiment of the utility model

[0027] Figure 6 for Figure 5 Enlarged view of point D in the middle

[0028] Figure 7 for Figure 5 Enlarged view of point E in the middle

[0029] Figure 8 A schematic diagram of a suction tube according to an embodiment of the utility model

[0030] Fig. 9 for Figure 8 Enlarged view of point F in the middle.

[0031] Figure Number:

[0032] Handle 100, power cord 110, buckle 120;

[0033] The cutter bar 200, the elbow assembly 210, the cutter head 220, and the annular groove 230;

[0034] Suction tube 300, suction hole 310, first opening 320, guide strip 330;

[0035] Positioning device 400, C-shaped connector 410, positioning bead 420;

[0036] Negative pressure connecting pipe 500;

[0037] The fixing device 600 , the fixing block 610 , the fixing hole 611 , and the fixing bolt 620 . DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] Reference Figures 1 to 9As shown, a flexible ultrasonic scalpel with a suction function according to an embodiment of the utility model comprises: a handle 100, a knife rod 200, a suction tube 300, and a fixing device 600. The knife rod 200 is connected to the front end of the handle 100, and an elbow assembly 210 is provided at the front end of the knife rod 200, and the elbow assembly 210 is connected to a knife head 220; the elbow assembly 210 can be bent under the control of an operator, and the specific structure of the elbow assembly 210 and the knife head 220 is a prior art, so it will not be described in detail. The suction tube 300 is slidably connected to the knife rod 200 and can slide along the knife rod 200, and the length of the suction tube 300 is less than the length of the knife rod 200. A plurality of suction holes 310 are provided at the front of the outer peripheral wall of the suction tube 300. Since the suction tube 300 can slide along the knife rod 200, the position of the suction hole 310 can be conveniently adjusted to accurately draw away the blood or smoke generated during the operation. For example, when the elbow assembly 210 is bent, the suction tube 300 is moved to the end away from the blade 220 to prevent the suction tube 300 from affecting the bending of the elbow assembly 210. When the blade 220 is cutting or stopping bleeding, the suction tube 300 is moved so that the suction hole 310 is as close to the blade 220 as possible to extract the blood that blocks the surgical field. When the ultrasonic knife is not needed, the front end of the suction tube 300 can be moved to the front of the blade 220 to block the blade 220 to simply perform the suction function. The suction tube 300 is connected to a positioning device 400 for fixing the knife rod 200. The positioning device 400 plays a positioning role, and the suction tube 300 is conveniently and quickly moved to a designated position. The suction tube 300 is connected to a negative pressure connecting tube 500 for connecting the suction tube 300 to a negative pressure suction device; the specific structure of the negative pressure suction device is a prior art, so it will not be described in detail. The fixing device 600 is connected to the handle 100 and is used to fix the negative pressure connecting tube 500. The fixing device 600 limits the movement of the suction tube 300 through the negative pressure connecting tube 500. When adjusting the position of the suction tube 300, the fixing device 600 cancels the fixation of the suction tube 300, so that the operator can adjust the relative position of the suction tube 300 and the knife rod 200. When the ultrasonic knife performs cutting and other operations, the fixing device 600 fixes the position of the suction tube 300 to prevent the suction tube 300 from shifting and affecting the suction effect. Compared with the prior art in which the suction tube 300 is directly fixed on the knife rod 200, the suction tube 300 slides along the knife rod 200, which has a more flexible use method, can adapt to various situations in surgery, and is conducive to improving surgical efficiency.

[0043] Reference Fig. 9As shown, it can be understood that the suction tube 300 is a hose with a hollow flat arc cross-section, and the suction tube 300 is made of a soft plastic material with a certain elasticity. In order to facilitate the clipping to the knife rod 200, it is foreseeable that the suction tube 300 can also be made of transparent silicone material to facilitate observation of the inside of the suction tube 300. The suction tube 300 has a first opening 320 from which the knife rod 200 can be clipped in, and the curvature of the first opening 320 is 30° to 60°. The suction tube 300 is slidably connected to the knife rod 200 by clipping, and can be easily disassembled and assembled, so that the suction tube 300 can be quickly removed when the suction tube 300 is not needed to reduce the weight of the ultrasonic knife and obtain a better operating feel. It is foreseeable that the minimum inner diameter of the suction tube 300 is larger than the outer diameter of the knife rod 200 so that the suction tube 300 can slide along the knife rod 200.

[0044] Reference Figures 1 to 9 As shown, it can be understood that multiple rows of protrusions extending along the length direction of the suction tube 300 are provided in the internal space of the suction tube 300. Multiple protrusions are arranged at equal intervals. The suction tube 300 and the protrusions are integrally formed. The height of the protrusion is 1mm to 1.5mm. Since the negative pressure suction device generates negative pressure in the suction tube 300, and then the air and blood and other fluids are extracted through the suction tube 300 through the suction hole 310, the air pressure in the suction tube 300 is lower than the atmospheric pressure. The atmospheric pressure acts on the outer wall of the suction tube 300 and easily collapses the suction tube 300, resulting in the inability of gas and blood to be introduced into the tube or the poor flow of gas in the tube. Since the wall thickness of the suction tube 300 is limited by the size of the opening of the abdominal surgery, it can only be made into a thin-walled part as much as possible, so there is a problem that the support strength of the suction tube 300 itself is not high, and the protrusion support is provided in the suction tube 300, which effectively improves the support strength of the suction tube 300, prevents the suction tube 300 from deformation and blockage, and ensures that the gas and liquid can pass smoothly through the suction tube 300. The extending direction of the protrusion is the same as the air flow direction in the suction tube 300 to reduce the pressure drop of the fluid passing through the suction tube 300 .

[0045] Reference Figure 1 and Fig. 9As shown, it can be understood that the positioning device 400 includes a C-type connector 410 and a positioning bead 420. The material of the C-type connector 410 is the same as that of the suction tube 300. The C-type connector 410 can be connected to the suction tube 300 by ultrasonic welding. The C-type connector 410 is connected to the side of the suction tube 300 away from the blade head 220. The C-type connector 410 is provided with a second opening, and the second opening is for the knife rod 200 to be inserted. The C-type connector 410 is connected to the knife rod 200. The C-type connector 410 is a solid structure to facilitate the installation of the positioning bead 420. The positioning bead 420 is arranged on the inner side of the C-type connector 410. Since the C-type connector 410 does not need to enter the abdominal cavity when in use, the thickness and size of the C-type connector 410 can be larger than the suction tube 300, so that there is enough space to install the positioning bead 420. The specific structure of the positioning bead 420 is prior art, so it will not be described in detail. The outer peripheral wall of the knife rod 200 is provided with a plurality of annular grooves 230 at intervals along the length direction of the knife rod 200, and the plurality of annular grooves 230 are arranged at equal intervals. The area of ​​the annular grooves 230 on the knife rod 200 determines the travel that the suction tube 300 can move. The number of annular grooves 230 determines the number of positions where the suction tube 300 can be positioned during movement. Increasing the number of annular grooves 230 can improve the positioning accuracy of the suction tube 300 when the area of ​​the distribution area of ​​the annular grooves 230 remains unchanged, but the number of annular grooves 230 cannot be increased indefinitely, because the annular grooves 230 themselves have a certain width, so the distance between adjacent annular grooves 230 cannot be equal to 0. The area of ​​the annular grooves 230 on the knife rod 200 must also meet the requirement that the suction tube 300 can be moved and positioned in a suitable area. Specifically, when the suction tube 300 moves to the position where the front end of the suction tube 300 is located in front of the front end of the knife head 220, the positioning bead 420 can be embedded in the corresponding annular groove 230 to fix the C-type connector 410 and the knife rod 200 along the length direction of the knife rod 200. When the suction tube 300 moves to the position where the front end of the suction tube 300 is located in the rear side of the rear end of the elbow assembly 210, the positioning bead 420 can also be embedded in the corresponding annular groove 230 to fix the C-type connector 410 and the knife rod 200 along the length direction of the knife rod 200. The positioning bead 420 can slide in the annular groove 230. During surgery, the operator needs to adjust the rotation angle of the knife rod 200 and the handle 100. Since the knife rod 200 is rotatably mounted on the handle 100, positioning through the annular groove 230 will not affect the rotation of the knife rod 200, and the knife rod 200 will not drive the suction tube 300 to rotate when rotating.

[0046] Reference Figure 2As shown, it can be understood that a plurality of guide bars 330 are provided at the front end of the outer peripheral wall of the suction tube 300, and the guide bars 330 are arranged around the suction tube 300, and the suction holes 310 are located between adjacent guide bars 330. A plurality of suction holes 310 are arranged at equal intervals between adjacent guide bars 330. A long strip-shaped guide groove is formed between adjacent guide bars 330 to reduce the possibility of clogging of the suction holes 310. Compared with setting the suction holes 310 in a long strip shape, setting a plurality of suction holes 310 in the guide groove can effectively improve the structural strength of the suction tube 300 and prevent clogging caused by being compressed by atmospheric pressure during operation.

[0047] Reference Figure 1 and Figure 4 As shown, it can be understood that the fixing device 600 includes a fixing block 610 and a fixing bolt 620, and the fixing block 610 is bolted to the handle 100. The specific structure of the handle 100 is the prior art, so it is not described in detail. It is foreseeable that the fixing block 610 can also be integrally formed with the handle 100, and the fixing block 610 is made of plastic material to reduce weight and reduce the burden on the operator. A fixing hole 611 is provided on the fixing block 610, and the extension direction of the fixing hole 611 is the same as the extension direction of the knife rod 200. The fixing hole 611 is for the negative pressure connecting pipe 500 to pass through. The negative pressure connecting pipe 500 can be a hose or a combination of a hose and a hard pipe. The fixing bolt 620 is threadedly connected to the fixing block 610, and the fixing bolt 620 partially extends into the fixing hole 611. The fixing bolt 620 is a stainless steel hand-tightened knurled bolt. The fixing bolt 620 is used to press against the negative pressure connecting pipe 500. By rotating the fixing bolt 620, the fixing bolt 620 can fix the negative pressure connecting tube 500 in the fixing hole 611. When the portion of the negative pressure connecting tube 500 passing through the fixing hole 611 is a hard tube, the fixing bolt 620 can fix the negative pressure connecting tube 500 more firmly. When the portion of the negative pressure connecting tube 500 passing through the fixing hole 611 is a soft tube, the fixing bolt 620 can squeeze the negative pressure connecting tube 500 to deform it while fixing the negative pressure connecting tube 500, thereby changing the flow area of ​​the negative pressure connecting tube 500 to achieve a throttling effect. Throttling of the negative pressure connecting tube 500 can change the size of the attraction force. The material can be selected according to actual needs. It is foreseeable that the fixing device 600 can also be replaced by tape.

[0048] Reference Figure 1 and Fig. 9 As shown, it can be understood that a lighting unit is provided at the front end of the suction tube 300. The lighting unit adopts a diffusion plate made of polymethyl methacrylate to provide a light source for uniform lighting.

[0049] Reference Figure 1 and Fig. 9As shown, it can be understood that an optical fiber is inserted into the suction tube 300 and the negative pressure connecting tube 500, and the optical fiber can pass through the negative pressure connecting tube 500 to connect to the light source, one end of the optical fiber is connected to the lighting unit, and the other end is connected to the light source. The light source is an LED lamp. The optical fiber guides the light generated by the light source into the lighting unit. It is foreseeable that in the case of other surgical field lighting equipment, the optical fiber can be connected to the indicator light, and the light generated by the indicator light is guided into the lighting unit, and the different working states of the ultrasonic knife are indicated by the light of different colors of the lighting unit.

[0050] Reference Figure 1 and Figure 6 As shown, it can be understood that the handle 100 is connected to the power cord 110, and the negative pressure connecting tube 500 is connected to the power cord 110 through the buckle 120. The negative pressure connecting tube 500 and the power cord 110 are fixed, which is conducive to making the pipeline route layout more concise, reducing space occupation, and facilitating use. The buckle 120 uses a common double-head plastic pipe clamp.

[0051] Reference Figure 1 and Fig. 9 As shown, it is understandable that the diameter of the outer peripheral wall of the suction tube 300 is not greater than 9 mm. Since the diameter of the laparoscopic trocar used in general laparoscopic surgery is generally 5 mm or 10 mm, the diameter of the suction tube 300 needs to be smaller than the diameter of the laparoscopic trocar to be used normally in surgery.

[0052] Working principle: The negative pressure suction device generates negative pressure in the suction tube 300, and then extracts air, blood and other fluids through the suction tube 300 through the suction hole 310 to keep the surgical field clear. The suction tube 300 is clamped on the knife rod 200, and the position of the suction hole 310 is adjusted by moving the suction tube 300. During the movement of the suction tube 300, the positioning beads 420 and the annular groove 230 cooperate to play a positioning role, and then the suction tube 300 is fixed to the knife rod 200 by the fixing device 600. The light source transmits light to the lighting part through the optical fiber to provide illumination of the surgical field.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A flexible ultrasonic knife with suction function, characterized in that: include: Handle(100); A knife rod (200) is connected to the front end of the handle (100); an elbow assembly (210) is provided at the front end of the knife rod (200); and a knife head (220) is connected to the elbow assembly (210); A suction tube (300), the suction tube (300) is slidably connected to the knife rod (200) and can slide along the knife rod (200), a plurality of suction holes (310) are provided at the front of the outer peripheral wall of the suction tube (300), a positioning device (400) for fixing the knife rod (200) is connected to the suction tube (300), and the suction tube (300) is connected to a negative pressure connecting tube (500) for connecting the suction tube (300) to a negative pressure suction device; A fixing device (600) is connected to the handle (100) and is used to fix the negative pressure connecting tube (500).

2. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The suction tube (300) is a hose with a hollow flat arc-shaped cross section. The suction tube (300) has a first opening (320) through which the knife rod (200) can be inserted. The curvature of the first opening (320) is 30° to 60°.

3. The flexible ultrasonic scalpel with suction function according to claim 2, characterized in that: A plurality of rows of protrusions extending along the length direction of the suction tube (300) are arranged in the internal space of the suction tube (300).

4. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The positioning device (400) comprises a C-shaped connecting piece (410) and a positioning bead (420), wherein the C-shaped connecting piece (410) is connected to a side of the suction tube (300) away from the knife head (220), the C-shaped connecting piece (410) is clamped on the knife rod (200), the positioning bead (420) is arranged on the inner side of the C-shaped connecting piece (410), and the outer peripheral wall of the knife rod (200) is provided with a plurality of annular grooves (230) at intervals along the length direction of the knife rod (200), and the positioning bead (420) can be embedded in the corresponding annular groove (230) to fix the C-shaped connecting piece (410) and the knife rod (200).

5. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: A plurality of guide strips (330) are arranged at the front end of the suction tube (300), and the suction hole (310) is located between adjacent guide strips (330).

6. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The fixing device (600) comprises a fixing block (610) and a fixing bolt (620); the fixing block (610) is connected to the handle (100); a fixing hole (611) is provided on the fixing block (610); the fixing hole (611) is used for the negative pressure connecting tube (500) to pass through; the fixing bolt (620) is threadedly connected to the fixing block (610); and the fixing bolt (620) is used to tightly abut against the negative pressure connecting tube (500).

7. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The front end of the suction tube (300) is provided with a lighting unit.

8. The flexible ultrasonic scalpel with suction function according to claim 7, characterized in that: Optical fibers are inserted into the suction tube (300) and the negative pressure connection tube (500); one end of the optical fiber is connected to the lighting unit, and the other end is connected to the light source.

9. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The handle (100) is connected to a power cord (110), and the negative pressure connecting tube (500) is connected to the power cord (110) via a buckle (120).

10. The flexible ultrasonic scalpel with suction function according to claim 1, characterized in that: The diameter of the outer wall of the suction tube (300) is no greater than 9 mm.

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