• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In the system an instrument (10) provided for the simultaneous coagulation and dissection of tissue has tissue receptacles between the cutting electrode and the sealing electrode for forming tissue bulges to hold the tissue in the tool during the sealing process. to make it possible to form bulky tissue bulges and to prevent their atrophy, the cutting electrode is supplied by a current limiting component, preferably in the form of a coupling capacitor. in this way, in particular, on fabric which can be cut easily but which requires a long time for sealing, a high degree of process security is achieved.
    公开号:BR102015021676B1
    申请号:R102015021676-9
    申请日:2015-09-04
    公开日:2022-01-04
    发明作者:Volker Mayer；Rolf Weiler；Heiko Schall；Achim Brodbeck；Tobias Amann
    申请人:Erbe Elektromedizin Gmbh；
    IPC主号:
    专利说明:

    [0001] Surgical instruments are known which can be used to cut tissue (dissection) and to seal tissue (coagulation).
    [0002] US 8,394,094 B2 discloses such an instrument. It is designed as a type of forceps to grip tissue between the two arms. On one of the arms, coagulation electrodes as well as a cutting electrode are attached. The other arm serves as a counter electrode. Furthermore, an opposing movable bearing is provided opposite the cutting electrode.
    [0003] WO 00/47124 discloses a similar instrument with a cutting electrode which is movably mounted. The cutting electrode is held between the two sealing electrodes which are associated with counter electrodes embedded in grooves. An electrical generator supplies power to this instrument from which the output voltage, the coagulation voltage as well as the cut-off voltage are derived. The transformer has a primary winding in one part or two parts and two secondary windings. In a modified configuration, the two output windings are connected together in one position. However, in any case, a voltage separation is present between the primary winding and the secondary winding. Thus, the transformer core must supply the energy needed for coagulation as well as for cutting.
    [0004] Experiments with various instrument configurations have shown that when sealing and cutting occur simultaneously, a complicated dependence between the surgical outcome and the technical parameters is present. The spatial configuration of the coagulation and cutting electrodes and also the type of electrical energy or power supply have a significant influence on the seal and incision quality. Both influencing factors affect the current distribution and the distribution of mechanical forces on the tissue and therefore the result achieved in the biological tissue.
    [0005] It is the objective of the invention to provide a system that allows a fast and safe separation of fabric and sealing by means of electrical energy.
    [0006] This issue is resolved by the system in accordance with Claim 1.
    [0007] The system according to the invention includes an instrument for treating biological tissue and a relevant energy supply unit. The instrument and the power supply unit are coordinated with each other in a special way. The instrument is equipped to simultaneously cut and coagulate or seal spatially distant tissue positions. For this, a cutting electrode, a coagulation electrode or sealing electrode and a counter electrode are provided. The cutting electrode and the coagulation electrode are located at a distance from each other and preferably separated by a tissue receptacle. The arms of the instruments having the electrodes can, for example, be moved, opened and closed manually by corresponding operating levers. But the invention is not limited to such instruments; it can also be used for motorized arms such as, for example, robot-controlled arms. The power supply unit contains a transformer that has two outputs; one output is connected with the cutting electrode and the other is connected with the coagulation electrode. The outputs are decoupled from each other via at least one current limiting element, eg in the form of a coupling capacitor. The current limiting element limits the flow of current to the cutting electrode and/or the coagulation electrode such that a potentially low tissue resistance present at the cutting electrode does not impair the coagulation result and a flow of current emanating from the electrode. cutting process does not lead to undesired manifestations of clotting. Conversely, the low tissue resistance at the coagulation electrode does not impair the cutting result.
    [0008] It is possible that a current limiting element is provided between the first output and the cutting electrode. This is seen as being advantageous. Additionally or alternatively, a current limiting element may be provided between the second output and the coagulation electrode. By means of a corresponding configuration of the current limiting elements, the treatment currents at the coagulation electrode and at the cutting electrode can be adjusted independently of each other. Additionally, the coagulation result can be influenced by the voltage that is present at the transformer outputs. Using one or both of the current limiting elements, the internal resistance of the high frequency source is adjusted as desired from the point of view of the respective electrode, albeit through the transformer windings; no-load voltages are set as desired at least at the output connected to the cutting electrode. As a result of separate voltage and current adjustments, the supply to the cutting electrode and to the sealing electrode or coagulation electrode can be optimized.
    [0009] Preferably, the cross sections of both arms, the first as well as the second arms, are U-shaped, as a result of which a tissue receptacle is created. This fabric receptacle is located such that it extends into the first as well as into the second arm. When the arms are closed, a gap can be created between them, a clamping gap. The tissue retained in the tissue receptacle engages behind the clamping gap and leads to a hold held by the tissue shape in the instrument even when the cutting electrode has already cut through the retained tissue. Current limiting by the coupling capacitor or other current limiting element in combination with the design (geometry, insulation and location) of the cutting element prevents tissue suture atrophy while cutting.
    [00010] The design of the cutting electrode in the area of its front face also influences the quality of the cut. In this way, the conducting sections in combination with the insulating regions on the front face of the cutting electrode are marked by current flow. Preferably, the cutting electrode is designed to be electrically conductive only on its small side. On its side surfaces facing the tightening gap, it is designed as electrically insulating as possible. This makes a clean incision possible. Furthermore, it can be achieved that the coagulation of the tissue in the receptacle is less than the coagulation of the tissue retained in the clamping gap. In this way, tissue atrophy in the tissue receptacle is minimized and the effect of retaining tissue during the clotting process is maximized.
    [00011] It can also be advantageous when the cutting electrode is designed partially electrically conductive without its side surfaces. Thus, this area includes, starting at the front side, less than 500 µm preferably 300 µm, such that the front face protrudes out of the insulation with its side surfaces in that area. As a result of a cutting element having small conductive sections on its front faces, sufficient cut quality can be guaranteed without thereby incurring too much tissue atrophy in the tissue receptacle.
    [00012] The cutting electrode can be connected to an electrically insulating opposing bearing element. This consists, for example, of plastic, for example elastomers or ceramics. However, it is also possible to use a metallic opposing bearing that is connected with the counter electrode or is electrically connected in isolation. As a result of the mobility of the opposing bearing element it may align corresponding to the changing thickness of tissue retained between the opposing bearing element and the cutting electrode. Preferably, the opposing bearing element is spring-loaded mounted. Thus, during the cutting process it can contribute to directing the main part of the gripping forces to the clamping gap of the coagulation electrodes and simultaneously pressing the atrophied tissue onto the cutting electrode, which supports the cutting process on one side, and on the other hand, the retention of the fabric in the clamping gap.
    [00013] The supporting surface of the opposing bearing element can be partially or entirely flat. In particular, the shape of the opposing bearing element is preferably adapted to the shape of the cutting electrode such that the cutting electrode preferably abuts along its entire length with the opposing bearing element. The coagulation electrode can be formed by a series of individual electrodes that are located at a distance from each other. Preferably, the same applies to the counter electrode. The individual electrodes located at a distance from the coagulation electrode are preferably electrically connected to each other. Likewise, the individual electrodes of the counter electrode are preferably electrically connected to each other. But preferably, the individual electrodes are not aligned to overlap each other such that when the arms are closed, even when no tissue is between them, no short circuit can occur.
    [00014] Preferably, the transformer is designed in such a way that the output connected with the cutting electrode provides a higher voltage than the output connected with the coagulation electrode. This determines the action of the cutting electrode and counter electrode not only by the type of electrode but also by the power supply to the electrodes.
    [00015] Preferably, the impedance of the current limiting element is greater than the internal resistance of the transformer at its first or second output. Thus impedance refers to the high frequency that is used. Therefore, the current limiting element (eg the coupling capacitor) limits the current such that even in the event of a short circuit on the connected electrodes, the voltage on the respectively other electrode does not collapse.
    [00016] Preferably, the transformer is supplied with the coagulation voltage. Additionally, preferably the transformer is designed as an autotransformer. In this way, the transformer core must only transmit the energy that must be supplied in one of its outputs; the energy supplied at the other output is not transported via the transformer core. Furthermore, the number of windings is reduced as one winding is jointly used by the primary and secondary sides. This makes the configuration especially space-saving and the lightest possible transformers that can also be housed in the instrument. Alternatively, the transformer can be magnetically coupled directly to the moving coil of the generator, whereby the outputs of the transformer are connected by at least one suitable current limiting element (e.g. coupling capacitor, ohmic resistance, RC combination) with the generator outputs.
    [00017] The configuration of the power supply unit according to the invention that is described above together with the configuration of the instrument according to the invention that is described above allows for tissue treatment, whereby the tissue separation process , tissue cutting ends before the tissue sealing process is finished and despite this, any bleeding of separated tissue is avoided or nearly avoided. This surprising result - that high quality fabric separation can be performed even though the cutting process is completed before the sealing process - leads to the result that the overall processing time of sealing fabric and cutting fabric can be reduced, the which in turn leads to savings during application. For example, the overall duration is typically three seconds shorter for the total cutting and sealing process, so, as a rule, less than 0.5 seconds applies to cutting the fabric. The remaining treatment time applies to the sealing process.
    [00018] For special applications it is also possible to configure the power supply arrangement so that the cutting element functions as the sealing electrode or as a passive component designed with no electrical function. For this, a switch can be located between the first output of the transformer and the cutting electrode, a potentiometer or another electrical component. The instrument arms are configured corresponding to the characteristics described above. A system designed in this way makes high quality vessel sealing possible.
    [00019] Additional details of advantageous embodiments of the invention can be learned from the drawing, the description or the dependent claims. They are shown:
    [00020] Figure 1 shows the system in a schematic illustration, partially in perspective;
    [00021] Figure 2 shows a tool component of the instrument in the arrangement according to figure 1, in illustration partially in cross section, in perspective;
    [00022] Figure 3 shows the tool component according to figure 2 in a vertical cross-section without fabric;
    [00023] Figure 4 shows a power supply unit for the instrument or its tool component according to figures 2 and 3 in a simplified circuit diagram;
    [00024] Figure 5 shows a modified configuration of the power supply unit as a simplified circuit diagram, and
    [00025] Figure 6 shows the instrument according to figure 3 during coagulation and dissection of biological tissue in a vertical cross-section illustration.
    [00026] Figure 1 shows a system 8 that includes a generator 9 and a surgical instrument 10 that is supplied by it. Generator 9 supplies instrument 10 with high frequency voltage which is carried to a tool 12 which is attached to a shaft 11. The proximal end of shaft 11 is connected with a housing 13, in which actuating elements 14 are located to move and actuating tool 12. Tool 12 serves to cut through tissue sealing the remaining tissue sutures such that tissue-contained vessels and lumen are sealed to the tissue suture.
    [00027] The tool 12 shown in figure 2 has two arms 15, 16 of which at least one is rotatably mounted around a pivot axis 17. The arms 15, 16 can be moved against each other by actuating the actuating element 14 , and releasing it, pushing them away. The arms 15, 16 can also be moved by other means such as, for example, pneumatic, hydraulic or electrical drives (not shown).
    [00028] The first, in figure 3 the upper arm 15, may consist of metal, ceramic or similar. Its main body 18 preferably has a U-profile cross-section and has two parallel first sealing electrodes 19, 20 which are preferably electrically connected to each other and which delineate a space 21 therebetween. This space extends through a significant part of the length of the first arm 15 and serves as an adapter for a cutting electrode holder 22 which is preferably housed immobile with a base 23 in the space 21. From the second base face 23a which is facing the second arm 16, a small knife-like extension 24 projects which preferably projects out of the space 21 which preferably ends below an imaginary line connecting the lower ends of the sealing electrodes 19, 20.
    [00029] Preferably, the sealing electrode 19, 20 is designed interrupted in the longitudinal direction such that it respectively has a row of single electrodes 25, 26 which can be electrically connected conducting with the main body 18. The individual electrodes are separated from each other. by insulating regions 27, 28. These can be applied as a type of coating to the sealing electrodes 19, 20 or inserted into the main body 18 as insulating bodies. Furthermore, the arm 15 is preferably provided with an insulating coating 29, such that the main body 18 can have electrical contact only at the sealing electrodes 19, 20, but cannot have any electrical contact with biological tissue in any other positions.
    [00030] On its front face, the cutting electrode holder 22 is provided with cutting electrode 31. Preferably, it is located in a groove or recess on the small underside of the knife-like extension 24, whereby the cutting electrode 24 Cutting 31 is exposed with a front face 32. Cutting electrode 31 is gripped between two groove walls 33, 34 which preferably have a width that is approximately the same size as the width of cutting electrode 31. cut 31 may be in the range of 0.5 to 0.25 mm and is preferably 0.1 mm. The groove walls 33, 34 preferably have a thickness of 0.15 mm, for example. Additionally, the cutting electrode 31 may have a small bulge on the groove walls or side walls 33, 34 which is only several micrometers, for example 500 µm, preferably 300 µm, particularly preferred 200 µm, and in a special design, it is preferably 0 μ m to 40 μ m.
    [00031] Extension 24 preferably projects over coagulation electrodes 19, 20 such that an imaginary line parallel to base face 23a connecting coagulation electrodes 19, 20 preferably intersects extension 24 at approximately half its height.
    [00032] The second arm 16 in figure 3 has a main body 35 preferably consisting of electrically conductive material which preferably has a U-shaped cross section. Its two side jaws 36, 37 enclose a space 38 between them and with their upper sections they form electrically conductive counter electrodes 39, 40 for sealing the cutting electrodes 19, 20 and for the cutting electrode 31.
    [00033] On its outer side, the main body 35 preferably has an insulating coating 41 that prevents any electrical contact with the surrounding biological tissue.
    [00034] Preferably an opposing movably mounted bearing 42 is located in the groove 38 which is resiliently retained, movable parallel to the jaws 36, 37, for example by a spring arrangement 43 consisting of one or more springs. Opposite bearing 42 is a rigid piece of ceramic, for example. But it can also be designed consisting of elastic, in particular resilient material, for example an elastomer. So itself is a spring arrangement. The oscillation of the spring arrangement 43 which is designed in any way is thus dimensioned in such a way that upon closing the arms and therefore aligning the coagulation electrodes 19, 20 above the counter electrodes 39, 40 a gap of tightening 45, 46 of zero is possible and therefore the maximum resilience trajectory has not yet been used. Opposite bearing 42 is in closed condition - in a preferred configuration slightly below counter electrodes 39, 40.
    [00035] The side of the opposite bearing element 42 facing the cutting electrode 31 is preferably formed as a flat pressing face 44. With respect to the longitudinal direction of the cutting electrode 31, the pressing face 44 is preferably designed corresponding to the shape of the cutting electrode 31 such that it can abut the pressure face 44 without any play. Preferably, the pressure face 44 extends between the counter electrodes 39, 40 and when the arms are completely closed (no fabric) abuts the front face 32 of the cutting electrode 31.
    [00036] The design of the thrust face 44 may be designed differently due to the material selection of the opposing bearing 42 or due to conditions provided by the application. Thus, for example, the pressing face 44, when the opposing bearing element 42 consists of elastomers, can be designed corresponding to the shape of the front face 32 of the cutting electrode 31 only in the area of the cutting electrode 31. The outer side of this area, pressure face 44 - in completely or almost completely closed arms (no fabric) can be projected raised or recessed with respect to the front face 32 of the cutting electrode 31 (not shown).
    [00037] Sealing electrodes 19, 20 and counter electrodes 39, 40 together define the tightening gap 45, 46, which preferably, as lines 47, 48 in Figure 3 indicate, are projected off-peak to the bearing. opposite 42 such that lines 47, 48 together enclose an obtuse angle β and when tool 12 is closed, intersect above pressure face 44 at an intersection S.
    [00038] The two fabric receptacles 53, 54 are a part of the geometry of the tool 12 determining its function. These are projected on both sides of the extension 24. They are limited vertically between the base 23 and the pressure face 44. When the arms are closed, the vertical expansion V is, for example, in the range of 0.7 mm to 2 .5 mm, preferably 1.4 mm. The two tissue receptacles 53, 54 are preferably of the same size and have a horizontal expansion H that is defined by the distance between the extension 24 and the respective jaw 36, 37. Preferably, the horizontal expansion H is significantly greater than the thickness of the electrode. 31, as well as greater than the thickness of the extension 24 and/or jaws 36, 37. Preferably, the horizontal expansion H is approximately 0.2 to 0.6 times as large as the vertical expansion V.
    [00039] Counter electrodes 39, 40 may be designed longitudinally continuous on jaws 36, 37. However, preferably they may also, as indicated in figure 2, consist of single electrodes 55, 56 corresponding to the design of sealing electrodes 19, 20 which are separated from each other by insulating regions 57, 58. Preferably, the insulating regions 57, 58 in the longitudinal direction of the arms are longer than the individual electrodes 55, 56. The insulating regions can be formed by an insulating coating or by bodies of insulation. Furthermore, the individual electrodes 55, 56 are displaced against the individual electrodes 25, 26 in such a way that they cannot contact each other when the clamping gap 45, 46 is zero and therefore the arms 15, 16 come into contact with each other. in touch. Each individual electrode 25, 26 then encounters an insulating region 57, 58. Alternatively, the structure can be designed in reverse. Sealing electrodes 19, 20 and counter electrodes 39, 40 may consist of insulating material with individual electrically conductive electrodes 55, 56.
    [00040] In figure 4, generator 9 is shown schematically. It includes a power supply unit 60 which supplies direct voltage to a high frequency generator 61. It consists of an oscillator circuit with a capacitor C and a coil L and is driven by a controlled repeater or control element 62 depending on specifications. of a control module 63.
    [00041] In coil L a coupler winding K decouples high frequency voltage to supply it via a line 64 (figure 1) to instrument 10. The high frequency voltage serves the purpose of supplying current to the sealing electrodes 19 , 20 as well as for the cutting electrode 31. A transformer T is used to share the voltage with a primary winding W1 and at least one secondary winding W2. Preferably, the T transformer is designed as an autotransformer. The primary winding W1 is connected with the output of the high-frequency generator 61, i.e., with its coupling coil (coupler winding) K. If transformer T is an autotransformer, its input (i.e., the upper end of its primary winding) is simultaneously its output A2. From this output A2 and hence from the output of the high frequency generator 61, a line 65 leads to the sealing electrodes 19, 20.
    [00042] A ground wire 66 which is connected with the lower end of winding W1 and coupler winding K, leads to counter electrodes 39, 40. As a result, between sealing electrode 19 and/or 20 and the counter electrode 39, 40. electrode 39 and/or 40 the biological tissue is made parallel to the winding W1 and is directly connected to the output of the high frequency generator 61. The tissue is charged with an output voltage Ua for sealing.
    [00043] To provide a cut-off voltage Us, winding W2 is connected at its lower end with line 65 and at its upper end with a current limiting element 67, preferably by a coupling capacitor 67 and a line 68 with the cutting electrode 31. The secondary winding W2 is biased in the same direction as the primary winding W1, such that the cut-off voltage Us is the total of the output voltage Ua and the voltage supplied by the winding W2, whereby this total is greater than the output voltage Ua. Transformer T has a low leakage inductance and a low internal resistance. The coupling capacitor 67 acts to limit current and this has the effect that the sealing electrode(s) 19, 20 is (are) supplied with a low internal resistance and the cutting electrode 31 is supplied with a low internal resistance. high internal resistance.
    [00044] Transformer T can be built into generator 9 or alternatively into instrument 10. Additionally, alternatively, it can be provided on line 64 or on an adapter 69 which is fitted on such or built into an adapter module - not shown. As Figure 5 shows, it is also possible to combine the transformer T and coil L of the high-frequency generator 61. In addition to the coupler winding K, a second coupler winding KS is then provided for the cut-off voltage Us, which in turn instead supplies the high frequency voltage out via coupling capacitor 67.
    [00045] So far, the described system 8 works as follows:
    [00046] To seal hollow vessels, to separate tissue from the body, in particular tissue containing blood vessels and which must therefore be sealed at the cutting sutures, such tissue 30 as shown in Figure 6 is gripped with the tool 12 between the arms 15 , 16, through which the arms are moved against each other. As soon as the tool 12 is sufficiently closed, the high frequency generator is actuated such that the sealing electrodes 19, 20 as well as the cutting electrode 31 are simultaneously charged with voltage with respect to the counter electrodes 39, 40 and therefore the tissue. receive an electrical charge. The tissue is pressed together at the nip gaps 45, 46 and heated, denatured and sealed by current passing from the sealing electrodes 19, 20 to the counter electrodes 39, 40. In the tissue receptacles 53, 54, the tissue atrophies into a lesser degree or not at all. The current emanating from the simultaneously charged cutting electrode 31 has a high current density at the front face 32 such that tissue is separated there by rapid dissection and by the cutting sparks produced by the high current at the cutting electrode 31. However, the density of current in tissue receptacles 53, 54 is low such that almost no tissue atrophy occurs here. The tissue bulges forming there prevent the tissue sutures from slipping out of the tool 12 despite the tissue being cut before the sealing process is complete.
    [00047] The shear current is limited by the coupling capacitor 67. The shear current is so high that after dissection and denaturation of the tissue 45 by the shear current in the cutting electrode 31, shear sparks can be generated to produce a cut through the fabric. However, the coupling capacitor 67 is sized such that an increase in current to levels that would lead to high current densities in the tissue receptacles is safely prevented. Thereby, tissue located in the tissue receptacles 53, 54 is prevented from atrophying excessively and thereby leaking out of the nip gap 45, 46 prior to completion of the sealing process.
    [00048] The interaction of high cutting current Us and the coupling capacitor 67 limits the cutting current during the tissue dissection phase in the area of the cutting electrode and guarantees, together with the tool geometry shown, the key to rapid and reliable dissection of biological tissue with a high degree of cut quality and a high degree of process safety.
    [00049] Alternatively or additionally, a coupling capacitor may be provided on line 65 to induce current. Furthermore, instead of coupling capacitor 67, a different current limiting component or an interconnection of components can be provided which may contain one or more capacitors.
    [00050] An instrument 10 provided for the simultaneous coagulation and dissection of tissue has a tissue receptacle 53 between the cutting electrode 31 and sealing electrode 19 to form a tissue bulge to hold the tissue in the tool 12 during the sealing process . To make the formation of bulky tissue bulges possible and to prevent their atrophy, the cutting electrode 31 is supplied by a current limiting element, preferably in the form of a coupling capacitor 67. Thus, in particular, in the case of tissue which can be cut easily but which needs a long time to seal, a high degree of process security can be achieved. List of reference signs:

    权利要求:
    Claims (14)
    [0001]
    1. System, having an instrument (10), having at least one coagulation electrode (19), at least one cutting electrode (31), and at least one counter electrode (39), the cutting electrode (31) being ), the coagulation electrode (19) and the counter electrode (39) are arranged on arms (15, 16) of a tool (12), at least one of which can be moved towards and away from the other, and with a power supply arrangement consisting of a generator (9) and a transformer (T), which has a first output (A1) connected to the cutting electrode (31), and a second output (A2) connected to the cutting electrode (31). coagulation (19), characterized in that at least one current limiting element in the form of a coupling capacitor (67) located located between the first output (A1) and the cutting electrode (31), and the impedance of the element current limiter (67) is greater than the transformer's internal resistance (T) at its first output (A1).
    [0002]
    2. System, according to claim 1, characterized in that the cutting electrode (31) and the counter electrode (39) are arranged on two different arms (15, 16) of the instrument (10), of which at at least one arm (15) can be moved towards and away from the other and establishing a clamping gap (45, 46) which is separated from the cutting electrode (31) by a tissue receiving space (53, 54). ).
    [0003]
    3. System according to claim 2, characterized in that the tissue receiving space (53, 54) both extend above the clamping gap (45, 46) into one of the arms (15, 16) and below the clamping gap (45, 46) inside the other of the arms (15, 16).
    [0004]
    4. System according to any one of claims 1 to 3, characterized in that the cutting electrode (31) has an electrically conductive front face (32) and is configured to be largely electrically isolated from the side faces facing the coagulation electrode (19).
    [0005]
    5. System according to any one of claims 1 to 4, characterized in that the cutting electrode (31) is arranged in opposition to an opposing insulating bearing element (42).
    [0006]
    6. System according to claim 5, characterized in that the opposing bearing element (42) is mounted so as to be displaceable.
    [0007]
    7. System, according to claim 6, characterized in that the opposite bearing element (42) is configured or mounted elastically.
    [0008]
    8. System according to any one of claims 1 to 7, characterized in that the coagulation electrode (19, 20) is formed by a series of individual electrodes (25, 26) mutually spaced.
    [0009]
    9. System according to any one of claims 1 to 8, characterized in that the counter electrode (39, 40) is formed by a series of individual electrodes (55) and (56) mutually spaced.
    [0010]
    10. System according to any one of claims 8 and 9, characterized in that the individual electrodes (19, 20) of the coagulation electrode (19) and the individual electrodes (55, 56) of the counter electrode (39 , 40) be arranged without overlapping each other.
    [0011]
    11. System according to any one of claims 1 to 10, characterized in that the transformer (T) is configured so that the first output (A1) supplies a higher voltage than the second output (A2).
    [0012]
    12. System according to any one of claims 1 to 11, characterized in that the impedance of the current limiting element (67) is greater than the internal resistance of the transformer (T) at its first output (A1).
    [0013]
    13. System according to any one of claims 1 to 12, characterized in that the transformer (T) has a winding (W1) which is supplied with a coagulation voltage (Ua), and that preferably, the voltages of output provided at outputs (A1) and (A2) be dimensioned so that the cut begins simultaneously with coagulation and is terminated before the end of the coagulation process.
    [0014]
    14. System according to any one of claims 5, 6 or 7, characterized in that the opposite bearing element (42) is formed by an elastomer.
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    同族专利:
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    US11020167B2|2021-06-01|
    KR20160030046A|2016-03-16|
    CN105395248A|2016-03-16|
    BR102015021676A2|2016-03-15|
    JP2016055175A|2016-04-21|
    CN105395248B|2018-02-06|
    EP2992849A1|2016-03-09|
    EP3708101A1|2020-09-16|
    KR101883537B1|2018-07-30|
    EP2992849B1|2020-06-17|
    PL2992849T3|2020-10-05|
    US20160066980A1|2016-03-10|
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    法律状态:
    2016-03-15| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-10-30| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-07-07| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-11-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-01-04| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/09/2015, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP14183945.6|2014-09-08|
    EP14183945.6A|EP2992849B1|2014-09-08|2014-09-08|System for simultaneous tissue coagulation and tissue dissection|
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