CN114366285A - Conductive tetrafluoro radio frequency ultrasonic knife - Google Patents
Conductive tetrafluoro radio frequency ultrasonic knife Download PDFInfo
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- CN114366285A CN114366285A CN202210098989.9A CN202210098989A CN114366285A CN 114366285 A CN114366285 A CN 114366285A CN 202210098989 A CN202210098989 A CN 202210098989A CN 114366285 A CN114366285 A CN 114366285A
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- conductive
- radio frequency
- tetrafluoro
- tissue
- carbon black
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00607—Coagulation and cutting with the same instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
- A61B2018/1452—Probes having pivoting end effectors, e.g. forceps including means for cutting
Abstract
The embodiment of the invention discloses a conductive tetrafluoro radio frequency ultrasonic knife which comprises a metal tong head and a knife pipe assembly connected with the metal tong head; a cutter bar is arranged in the cutter tube assembly, and the other end of the cutter tube assembly is connected with an operating handle; the metal forceps head is provided with a conductive polytetrafluoroethylene tissue pad; therefore, when the radio frequency function is used, the whole working surface of the tetrafluoro tissue pad can conduct high-voltage current (a closed area with a larger size is formed), and the current between the two poles of the cutter bar and the clamp head acts on the two end surfaces of the tissue up and down, so that the clinical effect is better; and has no adverse effect on the ultrasonic function.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a conductive tetrafluoro radio frequency ultrasonic knife.
Technical Field
The application of ultrasound in surgical operations is generally to convert and transmit ultrasonic energy into biological tissues, the thermal effect of which generates mechanical vibration to break the hydrogen bonds of tissue proteins, denature and coagulate the proteins, and in particular to coagulate, stanch and cut tissues by using the generated mechanical energy and thermal energy. In a surgical instrument, an ultrasonic generator (ultrasonic device main unit) generates high-frequency electric energy, converts the high-frequency electric energy into mechanical vibration energy by using a piezoelectric material or an electromagnetic compression material through a transducer, and amplifies and transmits the vibration energy to an action end (or a cutter head of a cutter bar).
There has also been a history of surgical procedures that use the radio frequency effect. Bipolar coagulation forceps are widely used in various surgical procedures. The heat effect of high-frequency current (frequency range 200kHz-5MHz) generated by a radio frequency generator is utilized to dehydrate, solidify, break and separate tissues so as to achieve the aim of operation.
As shown in fig. 2, in the existing radio frequency ultrasonic knife, one pole of the radio frequency function transmits a high voltage current to the knife bar 4 through the transducer, the other pole transmits the high voltage current to the forceps head 1 through the knife tube 3, and the high voltage current flows between the two poles of the knife bar 4 and the forceps head 1, so that the radio frequency function is realized; but because the ultrasonic probe rod 4 has the ultrasonic function, the ultrasonic probe rod 4 can not contact hard objects such as metal and the like, otherwise the ultrasonic probe rod 4 can be damaged, a tissue pad 2 is arranged at the middle part of the forceps head 1 for using the ultrasonic function, and the polytetrafluoroethylene has the advantages of acid resistance, alkali resistance, almost no solubility in all solvents, high temperature resistance, low friction coefficient and the like, and becomes the preferable material of the tissue pad; however, the polytetrafluoroethylene is not conductive, so that when the radio frequency function is used, the current between the two poles of the cutter bar 4 and the forceps head 2 does not act up and down on the two ends of the tissue 5, but forms a triangular angle (the closed area 6 is small in size); which is detrimental to the coagulation of tissue 5 and results in poor surgical outcome.
Disclosure of Invention
The invention aims to solve the problems of the prior art, and provides a conductive tetrafluoro tissue pad which solves the problems that when a radio frequency function is used, the size of a closed area is small because the conventional tissue pad cannot conduct electricity, and the coagulation effect is not good because the current between two ends of a cutter bar and a forceps head does not act up and down on two end faces of a tissue.
The better the electric conductivity of the tetrafluoro tissue pad is, the more the content ratio of carbon powder in the tetrafluoro tissue pad is, the lower the self-lubricating property of the tissue pad is, the shorter the service life is, and the use of the ultrasonic function can be affected. The invention provides a proportion range of the content of each component of a tetrafluoro tissue pad, which improves the coagulation tissue effect under the condition of no influence on the use of an ultrasonic function;
the embodiment of the invention provides a conductive tetrafluoro radio-frequency ultrasonic knife which comprises a knife tube component, a knife rod and a tong head, wherein the knife tube component, the knife rod and the tong head are made of metal materials, a tissue pad is arranged in a groove formed in the middle of the tong head, the near end of the knife rod penetrates through the knife tube component to be coupled with a transducer and is electrically connected with one electrode of radio-frequency equipment, the tong head is electrically connected with the other electrode of the radio-frequency equipment through the knife tube component, the far end of the knife rod penetrates through the knife tube component and is matched with the tong head which is rotatably connected with the far end of the knife tube component to clamp tissues, the tissue pad is made of a flexible conductive material, the components of the tissue pad comprise polytetrafluoroethylene with the mass percentage of 94-96% and conductive powder with the mass percentage of 4-6%, and the conductive powder comprises the following components in mass ratio of 4: 3-5: 1 of super conductive carbon black and composite carbon powder.
Furthermore, the type of the super conductive carbon black is ketjenblack.ec-600jd, and the type of the composite carbon powder is k-nonos-100 p.
Optionally, the tetrafluoro tissue pad structure arranged on the metal forceps head is one or more installation modes such as a T-shaped groove, a dovetail groove, a square groove, injection molding and bonding, and an insulating layer is coated on one side, facing the cutter bar, of the cutter tube assembly.
Optionally, the tetrafluoro tissue pad is composed of polytetrafluoroethylene, super conductive carbon black and composite carbon powder, and the mass percentages of the polytetrafluoroethylene, the super conductive carbon black and the composite carbon powder are respectively in the ranges of 94-96%, 2-3.5% and 1-2.9%.
Optionally, the flexible conductive material comprises 96% of polytetrafluoroethylene, 3% of super conductive carbon black and 1% of composite carbon powder by mass percentage.
According to the conductive tetrafluoro radio frequency ultrasonic knife provided by the embodiment of the invention, the metal forceps head is provided with the flexible conductive material, and the whole working surface of the flexible conductive material can conduct high-voltage current (a closed area with a larger size is formed), so that the current directly acts on the upper and lower surfaces of the knife bar, the forceps head and the tissue surface of the flexible conductive material; thereby leading the tissue coagulation effect to be better; and has no adverse effect on the ultrasonic function.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention as a part of the examples. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a block diagram of a metallic forceps head of a radio frequency ultrasonic blade according to an alternative embodiment of the present invention;
fig. 2 is a front view structural view of a conventional tetrafluoro binding clip according to the present invention;
FIG. 3 is a front view of a conductive tetrafluoro forceps head of a radio frequency ultrasonic blade in accordance with an alternative embodiment of the present invention;
FIG. 4 is a top view of a conventional tetrafluoro binding clip according to the present invention;
FIG. 5 is a top view of a configuration of an electrically conductive tetrafluoro forceps head of a radio frequency ultrasonic blade in accordance with an alternative embodiment of the present invention;
FIG. 6 is a block diagram of a radio frequency ultrasonic blade in accordance with an alternative embodiment of the present invention;
FIG. 7 is a close-up view of a tetrafluoro tissue pad in a clotted blood vessel test;
FIG. 8 is a general view of a tetrafluoro tissue pad in a blood vessel occlusion test.
In the figure:
1-forceps head, 2-tissue pad, 3-knife tube component, 4-knife rod, 5-tissue and 6-closing area.
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 examples of the present invention, but not all embodiments. 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, belong to the scope of the present invention.
Example 1:
as shown in figure 3, the tetrafluoro tissue pad 2 is replaced by a flexible conductive material, and the flexible conductive material comprises, by mass, 94-96% of polytetrafluoroethylene, 2.6-3.9% of super conductive carbon black and 1-2.9% of composite carbon powder. su
The preparation method comprises the steps of taking polytetrafluoroethylene as a base material, adding powdered granular super conductive carbon black and composite carbon powder into the polytetrafluoroethylene, uniformly mixing, pouring the mixture into a die, prepressing and forming to prepare a blank, then putting the blank into a sintering furnace for sintering, cooling, and processing the blank into the shape of a tissue pad by using a lathe. The model of the super conductive carbon black is ketjenblack.ec-600jd, and the model of the composite carbon powder is k-nanometers-100 p.
Conductive carbon black for Japanese musical instrument
EC-600JD chemical name: high purity conductive carbon black, basic characteristics:
EC-600JD (Ketjenblack) is a high-purity and high-performance super conductive carbon black, and is one of the current conductive carbon blacks with the highest conductivity.
The EC-600JD has a unique branched form and is easy to form a high-efficiency conductive network, so that the Ketjenblack superconducting carbon black has the following technical advantages: (1) the Ketjenblack EC-600JD only needs 1/3-1/6 of the addition amount of common conductive carbon black to achieve high conductivity. (2) Because the addition amount of the Keqin carbon black is very low, the influence of the conductive carbon black on the physical properties of the resin is greatly reduced.
(3) Unique morphology and extremely high specific surface area-about 1400M2/G (BET), generally the conductivity of conductive resins decreases with shear during processing extrusion. However, the Keqin conductive carbon black has strong toughness and can resist high shearing force, so that the material of the Keqin conductive carbon black can be extruded for several times without influencing the conductivity.
k-nano-100 p is the type of the Korean Jinhu petrochemical carbon nano-tube CNT, the diameter is 8-15 nm, the purity is not less than 90 percent, the bulk density is 0.015-0.030 g/ml,
the resistance value of the flexible conductive material is 103Omega to 106Omega is between.
For example, the flexible conductive material comprises 96 percent of polytetrafluoroethylene, 3 percent of super conductive carbon black and 1 percent of composite carbon powder by mass percent, and the resistance value of the resistor is 104Ω。
Comparative example 2
The polytetrafluoroethylene with the mass fraction of 100% is adopted for the tetrafluoro tissue pad 2, and the tetrafluoro tissue pad is non-conductive.
Comparative example 3
The tetrafluoro tissue pad 2 is replaced by a flexible conductive material, and the flexible conductive material is prepared by the method of the embodiment 1, and the components of the flexible conductive material comprise 97% of polytetrafluoroethylene, 2.5% of super conductive carbon black and 0.5% of composite carbon powder by mass percentage.
The resistance value of the flexible conductive material is 107Ω。
Comparative example 4
The tetrafluoro tissue pad 2 is replaced by a flexible conductive material, and the flexible conductive material is prepared by the method of the embodiment 1, and the components of the flexible conductive material comprise 93% of polytetrafluoroethylene, 4% of super conductive carbon black and 3% of composite carbon powder in percentage by mass.
The resistance value of the flexible conductive material is 102Ω。
Flexible conductive material as tissue pad for coagulation test and ultrasonic test
1.1 the above-mentioned tetrafluoro tissue pad of examples and comparative examples was used to conduct a blood vessel coagulation test, and the coagulation effect was judged by the pressure burst device test value, as shown in fig. 7 to 8, and the test procedure was as follows: one end of the blood vessel 5 is connected to the joint of the explosion pressure device, the blood vessel is coagulated by using the radio frequency function of the radio frequency ultrasonic knife, and after the blood vessel is naturally disconnected or closed, the pressure is applied to the gas transmission pipeline of the communication joint until the blood vessel is exploded or leaked. The other end of the gas transmission pipeline is connected with a digital display pressure testing device, and the maximum intracavity pressure is recorded, namely the blood vessel explosion pressure;
1.2 the effect on the ultrasonic function was judged by continuously cutting the tissue using the ultrasonic function to the radio frequency ultrasonic blade of the above example and comparative example, and testing the continuous service life of the tetrafluoro tissue pad and the flexible conductive material.
The test results of the two sets of tests are shown in table 1.
TABLE 1 test results
| Electric conductivity | Burst pressure value | Tissue pad life | |
| Example 1 | 104Ω | 1800mmHg | 3h |
| Comparative example 2 | Is not conductive | 1300mmHg | 3h |
| Comparative example 3 | 107Ω | 1400mmHg | 3h |
| Comparative example 4 | 102Ω | 1900mmHg | 2.5h |
The polytetrafluoroethylene is not conductive, the conductive performance of the flexible conductive material is inversely related to the content of the polytetrafluoroethylene, the condensation effect is positively related to the magnitude of the radio frequency current, the conductive material in the comparative example 4 has the largest addition amount and the best conductive performance, so the condensation effect is the best, and the conductive performance is reduced and the condensation effect is the worst in the comparative examples 1 and 3 along with the reduction of the addition amount of the conductive material.
The principle of ultrasonic knife cutting is that a tissue pad 2 and a knife bar 4 are used for clamping a tissue 5, and the knife bar 4 vibrates at high frequency (5 ten thousand times per second) under the driving of an ultrasonic transducer, so that the tissue pad 2 provided with sawteeth and the tissue 5 do high-frequency relative motion, the tissue 5 is broken in a friction mode, the larger the friction coefficient of the tissue pad 2 is, the lower the service life is, polytetrafluoroethylene is a material with a lower friction coefficient, the service life is long, but the friction coefficient of a flexible conductive material is increased along with the increase of the addition amount of carbon black and carbon powder, so that the service life is reduced, the comparative example 4 has the optimal conductive effect, but the friction coefficient is large, the service life is short, and therefore, the conductivity can be improved by adding a proper amount of the conductive material, the coagulation effect is enhanced, the friction coefficient is not greatly increased, and the service life is shortened.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art should make improvements and modifications to the present invention according to the teachings of the present invention within the protection scope of the present invention.
Claims (3)
1. The utility model provides a conductive tetrafluoro radio frequency supersound sword, including the sword pipe subassembly (3) of metal material, cutter arbor (4) and binding clip (1), it fills up (2) to form to install tissue in the recess at binding clip (1) middle part, the near-end of cutter arbor (4) passes sword pipe subassembly (3) coupling transducer, and be connected with an electrode electricity of radio frequency equipment, binding clip (1) is through another electrode of sword pipe subassembly (3) electricity radio frequency equipment, the distal end of cutter arbor (4) is passed sword pipe subassembly (3) and is organized with binding clip (1) cooperation centre gripping of sword pipe subassembly (3) distal end rotation connection, its characterized in that: the tissue pad (2) is made of a flexible conductive material and comprises the following components in percentage by mass of 94-96% of polytetrafluoroethylene resin particles and 4-6% of conductive powder, wherein the conductive powder comprises the following components in percentage by mass of 4: 3-5: 1, the type of the super conductive carbon black is ketjenblack.ec-600jd, and the type of the composite carbon powder is k-nonos-100 p.
2. The electrically conductive tetrafluoro radio frequency ultrasonic blade of claim 1, wherein: the flexible conductive material comprises, by mass, 94-96% of polytetrafluoroethylene, 2-3.5% of super conductive carbon black and 1-2.9% of composite carbon powder.
3. The electrically conductive tetrafluoro radio frequency ultrasonic blade of claim 1, wherein: the flexible conductive material comprises 96% of polytetrafluoroethylene, 3% of super conductive carbon black and 1% of composite carbon powder in percentage by mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210098989.9A CN114366285A (en) | 2022-01-25 | 2022-01-25 | Conductive tetrafluoro radio frequency ultrasonic knife |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210098989.9A CN114366285A (en) | 2022-01-25 | 2022-01-25 | Conductive tetrafluoro radio frequency ultrasonic knife |
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| CN202210098989.9A Pending CN114366285A (en) | 2022-01-25 | 2022-01-25 | Conductive tetrafluoro radio frequency ultrasonic knife |
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| CN110650696A (en) * | 2017-05-22 | 2020-01-03 | 爱惜康有限责任公司 | Combined ultrasonic and electrosurgical instrument with electrically insulating features |
| US20210196352A1 (en) * | 2019-12-30 | 2021-07-01 | Ethicon Llc | Partially conductive clamp arm pad to enable electrode wear through and minimize short circuiting |
| CN113796931A (en) * | 2021-09-23 | 2021-12-17 | 北京派尔特医疗科技股份有限公司 | Ultrasonic knife tool bit, ultrasonic knife and ultrasonic operation device |
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2022
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| CN101141922A (en) * | 2004-02-27 | 2008-03-12 | 伊西康内外科公司 | Ultrasonic surgical shears and tissue pad for same |
| CN101820825A (en) * | 2007-10-10 | 2010-09-01 | 伊西康内外科公司 | Ultrasonic device for cutting and coagulating |
| CN204562361U (en) * | 2015-01-20 | 2015-08-19 | 武汉半边天医疗技术发展有限公司 | With the bipolar ultrasonic cutter of high frequency hemostatic function |
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