CN113813021A - Bipolar ultrasonic knife head and preparation method thereof - Google Patents
Bipolar ultrasonic knife head and preparation method thereof Download PDFInfo
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- CN113813021A CN113813021A CN202111165116.7A CN202111165116A CN113813021A CN 113813021 A CN113813021 A CN 113813021A CN 202111165116 A CN202111165116 A CN 202111165116A CN 113813021 A CN113813021 A CN 113813021A
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- A61B17/00—Surgical instruments, devices or methods
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/08—Materials for coatings
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- A—HUMAN NECESSITIES
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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- A—HUMAN NECESSITIES
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- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320082—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for incising tissue
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Abstract
本发明公开了一种双极超声刀刀头及其制备方法，其基体由刀刃部、刀背部、刀杆连接部组成，刀背部和刀杆连接部涂覆有防散热涂层，制备时先用酸性砂面剂整体腐蚀刀头段，直至其表面粗糙度为2.0‑3.5μm；然后向刀头段整体喷涂聚四氟乙烯，擦除待抛光部的涂层，170～190℃烘烤固化后冷却至室温；再向刀头段整体喷涂聚四氟乙烯‑全氟烷基乙烯基醚共聚物，擦除待抛光部的涂层，370℃～390℃烘烤固化后冷却至室温；最后抛光待抛光部，形成刀刃部。本发明提供的双极超声刀刀头，一方面能避免刀头粘黏周围正常组织，另一方面能使刀头能量集中到刀刃上，提高切割效率，且本发明在双极超声刀刀头上制备的防散热涂层不易脱落。
The invention discloses a bipolar ultrasonic cutter head and a preparation method thereof. Use acidic sanding agent to etch the cutter head section as a whole until its surface roughness is 2.0-3.5μm; then spray Teflon on the whole cutter head section, wipe off the coating on the part to be polished, and bake at 170-190°C for curing After cooling to room temperature; spray polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer on the entire cutter head section, wipe off the coating on the part to be polished, bake at 370 ℃ ~ 390 ℃ and solidify and then cool to room temperature; finally The to-be-polished portion is polished to form a blade portion. The bipolar ultrasonic cutter head provided by the present invention, on the one hand, can prevent the cutter head from sticking to the surrounding normal tissues, and on the other hand, can concentrate the cutter head energy on the cutting edge, thereby improving the cutting efficiency, and the present invention is more efficient in the bipolar ultrasonic cutter head. The anti-heat dissipation coating prepared on the above is not easy to fall off.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a bipolar ultrasonic scalpel head and a preparation method thereof.
Background
The ultrasonic knife comprises main components such as a host, a handle, a knife head, a pedal plate and the like. The handle is provided with a transducer which converts high-frequency electric energy provided by the main generator into ultrasonic mechanical vibration energy, transmits the ultrasonic energy to the cutter head and simultaneously transmits the ultrasonic energy, the thermal effect of the mechanical vibration is generated to break tissue protein hydrogen bonds, the protein is denatured and solidified, and particularly, the mechanical energy and the thermal energy generated by the transducer are utilized to carry out solidification, hemostasis, cutting and the like on the tissue, and the vibration frequency of the cutter head is about 55.5 kHz. The ultrasonic knife head has two blades, one is the working blade for applying ultrasonic wave, and the other blade has a white protecting pad with insection. The white protective pad is used for better clamping tissues to enhance the coagulation effect, and the working leaves can be directly cut like an electric knife. A high-frequency electric knife is an electric surgical instrument for replacing a mechanical scalpel to cut tissues. The tissue is heated when the high-frequency high-voltage current generated by the tip of the effective electrode contacts with the body, so that the separation and coagulation of the body tissue are realized, and the purposes of cutting and hemostasis are achieved.
The bipolar ultrasonic knife integrates the ultrasonic knife and the high-frequency electric knife on a bare knife head, simultaneously outputs ultrasonic energy and high-frequency electric energy, can improve the cutting efficiency of tissues, and simultaneously meets the blood coagulation function. At present, the problem that bipolar ultrasonic knife exists is because energy output is too high, and the tool bit is easy heat diffusion bad, can injure surrounding normal tissue under most circumstances, appears the phenomenon that the tool bit glues the tissue.
Disclosure of Invention
Aiming at the problem that the cutter head of the bipolar ultrasonic cutter in the prior art is adhered to tissues, the invention provides the cutter head of the bipolar ultrasonic cutter coated with the anti-heat-dissipation coating, so that the cutter head is prevented from being adhered to surrounding normal tissues on one hand, the energy of the cutter head is concentrated on the cutter edge on the other hand, and the cutting efficiency is improved.
The invention provides a coating method of a bipolar ultrasonic knife head, which is characterized in that the vibration frequency of the bipolar ultrasonic knife head is too high, and the anti-heat-dissipation coating coated by a common coating method is easy to fall off.
The invention is realized by the following technical scheme:
in a first aspect, the present invention provides a bipolar ultrasonic scalpel head, wherein a base body comprises a scalpel edge portion, a scalpel back portion and a scalpel bar connecting portion, and the scalpel back portion and the scalpel bar connecting portion are coated with a heat dissipation prevention coating. By adopting the technical scheme, the bipolar ultrasonic knife head provided by the invention can concentrate the energy of the knife head on the knife edge, and the cutting efficiency is improved.
On the basis of the technical scheme, the heat dissipation prevention coating consists of a polytetrafluoroethylene layer and a polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer from inside to outside. By adopting the technical scheme, the bipolar ultrasonic scalpel head provided by the invention can prevent the scalpel head from being stuck to surrounding normal tissues.
On the basis of the technical scheme, the surface of the base body of the connecting part of the cutter back part and the cutter bar is a sand surface with the roughness of 2.0-3.5 mu m. By adopting the technical scheme, the bipolar ultrasonic scalpel head provided by the invention can prevent the scalpel head from being stuck to surrounding normal tissues.
On the basis of the technical scheme, the thickness of the polytetrafluoroethylene layer is 20-100 mu mm; the thickness of the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer is 100 to 500 mu m. By adopting the technical scheme, the bipolar ultrasonic knife head provided by the invention can further prevent the capacity from being lost, so that the energy of the knife head is concentrated on the knife edge, and the cutting efficiency is improved.
On the basis of the technical scheme, the width of the knife edge part is 0.8-1.5 mm, and the length of the knife edge part is 8-13 mm. By adopting the technical scheme, the bipolar ultrasonic knife head provided by the invention can further prevent the capacity from being lost, so that the energy of the knife head is concentrated on the knife edge, and the cutting efficiency is improved.
In a second aspect, the present invention provides a method for manufacturing a bipolar ultrasonic scalpel head, comprising the following steps:
integrally corroding the cutter head section by using an acid sand surface agent until the surface roughness of the cutter head section is 2.0-3.5 mu m;
spraying polytetrafluoroethylene on the whole tool bit section, erasing a coating of a part to be polished, baking at 170-190 ℃ for solidification, and cooling to room temperature;
spraying polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer on the whole cutter head section, erasing the coating of the part to be polished, baking at 370-390 ℃ for solidification, and cooling to room temperature;
and polishing the part to be polished to form a knife edge part.
By adopting the technical scheme, the invention can prepare the firm anti-heat-dissipation coating on the substrate.
On the basis of the technical scheme, the step of using the acid sand surface agent to integrally corrode the cutter head section comprises the following steps: soaking the cutter head section in an acid sand surface agent for 3-5 minutes; the acid sand surface agent comprises the following components: 20-30 wt% of organic acid, 5-10 wt% of inorganic acid, 5-8 wt% of accelerant, 12 wt% of dispersant, 2 wt% of auxiliary agent and the balance of water.
On the basis of the technical scheme, the step of spraying polytetrafluoroethylene on the whole cutter head is carried out within 30min after the step of corroding the cutter head by using the sand surface agent, so that the surface of a corroded surface can be prevented from being oxidized and losing adhesive force.
On the basis of the technical scheme, the step of integrally spraying the polytetrafluoroethylene to the cutter head section or the step of integrally spraying the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer to the cutter head section specifically comprises the steps of keeping a spray gun nozzle still and enabling a cutter bar to rotate around the axial direction at a constant speed; the size phi of the spray gun nozzle is 1.0-1.5 mm, the distance between the spray gun nozzle and the cutter bar is 20-30 cm, the pressure of a spray gun is 0.2-0.3 Mpa, the spraying time is 3-5 seconds, and the cutter bar rotates 2-3 circles in the spraying process. By adopting the technical scheme, the polytetrafluoroethylene layer with the thickness of 20-100 mu m and the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer with the thickness of 100-500 mu m can be prepared.
On the basis of the technical scheme, the time for heating the cutter head section from room temperature to 370-390 ℃ is not shorter than 30min, so that the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer is prevented from cracking due to too fast heating.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the heat dissipation prevention coating is arranged on the cutter head, so that the heat diffusion of the cutter head of the ultrasonic cutter is reduced, and the energy is concentrated; and avoids the knife back from damaging normal tissues and sticking tissues.
2. The preparation method of the bipolar ultrasonic scalpel bit can prepare a firm heat dissipation preventing coating on the tool bit, and the coating still does not easily fall off even under high-frequency vibration.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a bipolar ultrasonic blade;
FIG. 2 is a schematic view of a tool tip segment spray coating;
wherein, 1-cutter bar, 2-cutter head section, 21-blade part, 22-cutter bar connecting part and 23-cutter back part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the following embodiments, when the coating is prepared, in order to improve the adhesive force of the coating, the surface of the cutter bar cannot be polluted, and the cutter head section has no oil stain; the knife edge part can be corroded without being protected intentionally, but before the two steps of spraying primer and spraying finish paint, the knife edge part needs to be scraped off firstly so as to wipe off the uncured primer and finish paint, and a hard plastic is used for wrapping a dust-free cloth to wipe out a notch shape.
In the following embodiments, the tool bar of a knife in a Youli card (G55U06993) is used as an initial processing object; the adopted acidic sand surface agent comprises 25% of organic acid, 10% of inorganic acid, 8% of accelerant, 12% of dispersing agent, 2% of auxiliary agent and the balance of water.
Example 1
1. Immersing the cutter head section on the cutter bar in an acid sand surface agent at room temperature for 5 minutes, taking out, immediately washing the cutter head section with clear water, removing residual solution, and measuring the surface roughness (Ra) of the base material of the cutter head to be 3.0 mu m; after the residual solution is removed, soaking the cutter head section by using a detergent (the detergent is used for removing oil stains on the surface of the cutter head section and preventing the coating from falling off, and currently, washing powder is used and soaked for 10 minutes at the temperature of 40-50 ℃), rinsing the cutter head section by using clear water, airing the cutter head section and removing grease and dust on the surface of the cutter head section;
2. placing the cutter bar on a fixed frame, and waiting for spraying of the primer; note that to prevent the surface from oxidizing and losing adhesion, the cutter head section must be sprayed with a water-based primer immediately within 30 minutes after the acidic sanding agent treatment. Spraying water-based primer: the primer spraying air gun with the phi of 1.0mm is connected with an air pipe, polytetrafluoroethylene (FTFE) water-based primer is uniformly shaken and poured into a primer spraying air gun auxiliary container, a nozzle is adjusted to be 30cm away from a cutter bar, the pressure of a spray gun is 0.3Mpa until the aerosol concentration of the primer is proper when the spray gun sprays, the spray gun is used for directly spraying for 5 seconds, the spray gun is kept still by aligning with the cutter bar when spraying, the cutter bar is rotated for 3 circles at a constant speed, black water-based primer is uniformly sprayed on a cutter head section, and a gap is immediately wiped out by wrapping dust-free cloth with hard plastics. And (3) putting the mixture into an oven for heating and curing, wherein the temperature is 180 ℃ for 20 minutes, taking the mixture out of the oven, naturally cooling the mixture to room temperature, and waiting for spraying of finish coat (PFA).
3. Spraying finish Paint (PFA): the finish paint component is tetrafluoroethylene perfluoroalkyl vinyl ether copolymer (PFA), and the finish paint spraying process is the same as the step 2. And (3) sintering finish paint: the temperature of the oven is set to 380 ℃, the temperature needs to be slowly increased in the temperature increasing process, the temperature is increased from room temperature to 380 ℃ in about 30min, the temperature is kept for 1 hour (not less than 1 hour) after the temperature reaches the set temperature, and then the product is discharged from the furnace and is naturally cooled to the room temperature.
4. The part to be polished is polished on a wool wheel to form a knife edge part with the length of 13mm and the depth of 1mm, and the figure is shown in detail in figure 1.
As shown in fig. 1, in this embodiment, a bipolar ultrasonic scalpel head is prepared, wherein a substrate of the bipolar ultrasonic scalpel head comprises a scalpel edge portion, a scalpel back portion and a scalpel bar connecting portion, the scalpel back portion and the scalpel bar connecting portion are coated with a heat dissipation preventing coating, the heat dissipation preventing coating comprises a polytetrafluoroethylene layer and a polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer from inside to outside, and the thickness of the polytetrafluoroethylene layer is 20-100 μmm; the thickness of the polytetrafluoroethylene perfluoroalkyl vinyl ether copolymer layer is 100 to 500 mu m, the width of the knife edge part is 0.8 to 1.5mm, and the length is 8 to 13 mm.
Comparative example 1
The smooth, bare tool holder was polished to a blade length of 13mm and a depth of 1mm, as shown in fig. 1.
Comparative example 2
Unlike example 1, this comparative example does not include step 1, and the rest of the steps are the same as example 1, that is, the entire tool bar is not soaked in the sand surface agent for treatment, and the FTFE layer and the PFA layer are directly and sequentially sprayed on the tool bar with a smooth surface.
Comparative example 3
Unlike example 1, this comparative example does not include step 2, and the rest of the procedure is the same as example 1, i.e., the FTFE layer is not sprayed on the sand surface, but the PFA layer is directly sprayed.
Comparative example 4
Unlike example 1, this comparative example does not include step 3, and the remaining steps are the same as example 1, i.e., the PFA layer is not sprayed on the outside of the FTFE layer.
Test results
Meat cutting experiments were performed using the tips prepared in the above examples and comparative examples, recorded every 30 minutes for three hours, with the ultrasound set at the maximum gear (5 th) and the dipole set at 70 w. The effect record is shown in table 1:
TABLE 1 meat-cutting test results
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A bipolar ultrasonic blade cartridge, comprising: the base body comprises a knife edge part, a knife back part and a knife bar connecting part, wherein the knife back part and the knife bar connecting part are coated with a heat dissipation prevention coating.
2. The bipolar ultrasonic blade cartridge of claim 1, wherein: the anti-heat dissipation coating consists of a polytetrafluoroethylene layer and a polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer from inside to outside.
3. The bipolar ultrasonic blade cartridge of claim 1, wherein: the surface of the base body of the connecting part of the knife back part and the knife bar is a sand surface with the roughness of 2.0-3.5 mu m.
4. The bipolar ultrasonic blade cartridge of claim 1, wherein: the thickness of the polytetrafluoroethylene layer is 20-100 mu mm; the thickness of the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer layer is 100-500 mu m.
5. The bipolar ultrasonic blade cartridge of claim 1, wherein: the width of the knife edge part is 0.8-1.5 mm, and the length is 8-13 mm.
6. A method for manufacturing a bipolar ultrasonic scalpel head, comprising the following steps:
integrally corroding the cutter head section by using an acid sand surface agent until the surface roughness of the cutter head section is 2.0-3.5 mu m;
spraying polytetrafluoroethylene on the whole tool bit section, erasing a coating of a part to be polished, baking at 170-190 ℃ for solidification, and cooling to room temperature;
spraying polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer on the whole cutter head section, erasing the coating of the part to be polished, baking at 370-390 ℃ for solidification, and cooling to room temperature;
and polishing the part to be polished to form a knife edge part.
7. The method of making a bipolar ultrasonic blade cartridge of claim 6, wherein: the step of using the acid sand surface agent to integrally corrode the cutter head section is as follows: soaking the cutter head section in an acid sand surface agent for 3-5 minutes; the acid sand surface agent comprises the following components: 20-30 wt% of organic acid, 5-10 wt% of inorganic acid, 5-8 wt% of accelerant, 12 wt% of dispersant, 2 wt% of auxiliary agent and the balance of water.
8. The method of making a bipolar ultrasonic blade cartridge of claim 6, wherein: and the step of spraying polytetrafluoroethylene on the whole cutter head is carried out within 30min after the step of corroding the cutter head by using the sand surface agent.
9. The method of making a bipolar ultrasonic blade cartridge of claim 6, wherein: the step of integrally spraying the polytetrafluoroethylene on the cutter head section or the step of integrally spraying the polytetrafluoroethylene-perfluoroalkyl vinyl ether copolymer on the cutter head section is specifically that a spray gun nozzle is kept still, and a cutter bar rotates around the axial direction at a constant speed; the size phi of the spray gun nozzle is 1.0-1.5 mm, the distance between the spray gun nozzle and the cutter bar is 20-30 cm, the pressure of a spray gun is 0.2-0.3 Mpa, the spraying time is 3-5 seconds, and the cutter bar rotates 2-3 circles in the spraying process.
10. The method of making a bipolar ultrasonic blade cartridge of claim 6, wherein: the time for heating the cutter head section from room temperature to 370-390 ℃ is not shorter than 30 min.
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