Surgical operating instrument
By designing relatively movable metal electrodes and cooling bodies in high-frequency surgical instruments, and utilizing elastic elements and toothed structures to regulate heat transfer, the problems of high cost and excessive thermal mass in existing technologies are solved, achieving efficient heating and cooling effects and improving sealing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AESCULAP AG
- Filing Date
- 2024-10-22
- Publication Date
- 2026-05-19
AI Technical Summary
The metal electrodes of existing high-frequency surgical instruments are costly to manufacture and have excessive thermal mass, resulting in uneven energy distribution and affecting sealing efficiency and tissue cooling effect.
Design a surgical instrument in which metal electrodes and a cooling body achieve thermal decoupling and coupling through relative motion, and utilize elastic elements and toothed structures to adjust heat transfer under different states to ensure effective heating and cooling.
This technology enables efficient heating and cooling of metal electrodes under different conditions, reduces unnecessary heat loss, avoids damage to surrounding tissues, and improves the efficiency of the sealing process.
Smart Images
Figure CN122070104A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a medical high-frequency surgical instrument (HF instrument), particularly a bipolar vascular sealing instrument, having a jaw portion and at least one metal electrode for sealing tissue. Background Technology
[0002] In high-frequency surgery (also known as HF surgery), a high-frequency alternating current is directed through the human body or body parts to selectively brittle (coagulate) or cut (electrosurgically) tissue through the resulting heat. The damaged tissue is then absorbed by the surrounding healthy tissue. A significant advantage over traditional cutting techniques using a scalpel is that bleeding can be stopped in a coagulating sense by sealing the affected blood vessels during the cutting process.
[0003] Currently, monopolar HF technology is most commonly used in HF surgery. Here, one pole of the HF voltage source is connected to the patient via a corresponding electrode with the largest possible surface area, such as through contacts on the operating table where the patient is located, through contact arm or foot straps, or through adhesive electrodes. This corresponding electrode is usually referred to as the neutral electrode. The other pole is connected to a surgical instrument, and this surgical instrument forms what is called the active electrode. Current flows from the active electrode to the neutral electrode via a path of least resistance. The current density is highest immediately adjacent to the active electrode, where the thermal effect is strongest. The current density decreases with the square of the distance. The neutral electrode should be well-connected to the body with the largest possible surface area to keep the current density within the body low and prevent burns. Due to the large surface area, the skin on the neutral electrode will not be significantly heated. Strict safety measures are applied when installing the neutral electrode. Proper placement and good contact of the neutral electrode (depending on the surgical area) are crucial to prevent combustion.
[0004] In bipolar HF technique, unlike monopolar technique, current flows through a small portion of the body where a surgical effect (cutting or coagulation) is desired. Two insulated metal electrodes are directed directly to the surgical site, housed in the jaws of an HF instrument, and an HF voltage is applied between them. The circuit closes through the tissue located between them. A thermal effect occurs in the tissue between the metal electrodes.
[0005] In such HF instruments, especially bipolar sealing instruments, the jaw portion is preferably manufactured / constructed in a sandwich structure. The jaw portion consists of, or has these components, a thin metal electrode serving as a contact surface for contacting tissue, a spacer made of plastic providing electrical and thermal insulation, and a load-bearing member configured to ensure force introduction and include a closing mechanism. The load-bearing member provides the jaw portion with the necessary stability and rigidity.
[0006] However, the manufacturing process for this sandwich structure of the jaws is cumbersome and costly. The accumulation of manufacturing tolerances due to the different components (which must be interconnected) reduces the fit and therefore the quality of the jaws or HF instruments.
[0007] One way to eliminate these drawbacks is to design / construct the branches of the metal electrode or jaw portion as solid components.
[0008] However, this solid metal electrode has a high thermal mass, which, especially when the jaw portion is large, causes most of the energy delivered to the metal electrode via the HF generator to flow into the tissue seal rather than into the heating of the solid metal electrode.
[0009] Therefore, such a large amount of cooling material on the back side of the electrode can extract so much heat from the metal electrode and the tissue that the sealing / sealing process will last longer than absolutely necessary. Simultaneously, the jaw portion should have a cooling body to cool the metal electrode when it is not in use. This minimizes unwanted damage to surrounding tissue, for example, during tissue preparation or when contact occurs when the jaw portion changes position. Summary of the Invention
[0010] Therefore, the objective of this disclosure is to overcome or at least reduce the disadvantages of the prior art, and in particular to provide a surgical instrument in which electrodes can be effectively heated and effectively cooled. Excessive heat loss due to cooling should be avoided in particular.
[0011] This task is accomplished by a surgical instrument with the features of claim 1.
[0012] This disclosure relates to a surgical (high-frequency) instrument having a jaw portion or distal effector with two legs or arms, the two legs or arms being movable relative to each other between an open / released state and a closed / clamping state of the jaw portion. The jaw portion has at least one (metallic) electrode and a cooling body facing away from the contact surface, the electrode having a contact surface for contacting tissue. In the closed state of the jaw portion, at least one metallic electrode and at least one cooling body are spaced apart and thermally separated from each other, and in the open state of the effector, at least one metallic electrode and at least one cooling body are in a (thermally conductive / heat-transferring / thermally coupled) connection.
[0013] The jaws are movable between an open and closed state, like scissors. Specifically, the jaws have two relatively movable arms that can open and close. In the closed state, the contact surface is in contact with the tissue, and in the open state, the contact surface is spaced apart from the tissue. At least one metal electrode and at least one cooling element are movably arranged relative to each other. When the jaws are closed, a closing force or clamping force acts on the at least one metal electrode and the at least one cooling element. This closing force causes the at least one metal electrode and the at least one cooling element to move relative to each other. Through this relative movement, the at least one metal electrode can be (thermally) separated from the at least one cooling element. The closing force is eliminated when the jaws are opened. The elimination of the closing force, in turn, causes the opposite relative movement or opening movement between the at least one metal electrode and the at least one cooling element. Through this opening movement, the at least one metal electrode and the at least one cooling element are interconnected such that they are thermally coupled or in a thermally conductive connection adjacent to each other.
[0014] In other words, a surgical instrument, particularly a HF instrument, is disclosed, which has the following characteristics:
[0015] - The jaw portion has two legs or branches that are movable relative to each other between a tissue release position and a tissue clamping position of the jaw portion;
[0016] - At least one electrode optionally loaded with current, the electrode being supported on one leg on the side facing the other leg; and
[0017] - A cooling body, the cooling body being disposed on the side of the at least one electrode opposite to the other leg, and
[0018] - A pre-tensioning device, preferably a spring, is configured and positioned to pre-tension the at least one electrode relative to the thermal contact surface of the cooling body for heat transfer, with its pre-tensioning direction pointing towards the other leg, such that in the tissue clamping position, the at least one electrode is pre-tensioned and spaced apart from the thermal contact surface against the spring, and in the tissue release position, the at least one electrode and the thermal contact surface of the cooling body are in mutually thermally conductive contact.
[0019] Therefore, the core of this disclosure is that at least one metal electrode and at least one cooling element of a surgical instrument can be thermally decoupled from each other and recoupled (through relative movement). That is, the thermal conductivity between at least one metal electrode and at least one cooling element can vary depending on the operating state of the surgical instrument. Specifically, at least one cooling element can be connected to at least one metal electrode and can also be decoupled.
[0020] The surgical instrument according to this disclosure has the following advantages. At least one metal electrode and at least one cooling body can be thermally decoupled and coupled again depending on the operating state. That is, the at least one cooling body or the cooling material of the at least one cooling body can be designed to be so large that the at least one metal electrode can be effectively cooled by the at least one cooling body when the at least one metal electrode is not in use. At the same time, it can be ensured that when the metal electrode is to be heated to seal tissue, the large cooling material of the cooling body will not unnecessarily and intensely cool the metal electrode. Therefore, the metal electrode can effectively seal the fabric. At the same time, when the surgical instrument is not in use, the metal electrode can be rapidly cooled by the large, connectable cooling material. Therefore, damage to surrounding tissue due to (accidental) contact with the (heated) metal electrode can be prevented or at least reduced. In addition, the jaw portion is closed to prevent contamination.
[0021] Advantageous improvements of this disclosure are the subject of the appended dependent claims.
[0022] Preferably, the device may have an elastic element, particularly a spring, which is compressed by the closing force of the jaws in the closed state. When the closing force disappears / decreases, the elastic force of the elastic element can cause relative movement between the at least one metal electrode and the at least one cooling element. That is, the at least one cooling element and the at least one metal electrode can be pre-tightened by the at least one elastic element. The at least one elastic element can be compressed, in particular, when the jaws are closed. If the force pressing the legs of the jaws together is eliminated, the at least one metal electrode and the at least one cooling element can move relative to each other by the elastic force of the elastic element. Thus, when the jaws are open, at least one metal electrode and at least one cooling element can be connected "automatically" or at least segmentally connected and thereby thermally coupled without further user intervention. Therefore, the metal electrodes can be effectively cooled when the jaws are open. Thus, the cooling section can be activated by the elastic element without the user having to manually operate it.
[0023] An air gap can be created between the at least one metal electrode and the at least one cooling body through relative movement between them, which causes thermal insulation between the two components.
[0024] The at least one elastic element is preferably a helical spring. Helical springs are particularly inexpensive components. Preferably, the at least one spring can be arranged such that the elastic force is perpendicular to the longitudinal extension of each leg. Specifically, the elastic force can therefore act substantially opposite to the closing force of the jaw portion. The elastic element can also be an elastic pad, which is preferably made of an elastic material, such as elastic foam.
[0025] In a preferred embodiment, each leg of the jaw portion may have two elastic elements that allow the metal electrode to move relative to the cooling body. Of course, the jaw portion may also have elastic elements, three or four, or any number of elastic elements.
[0026] According to an advantageous aspect of this disclosure, the elastic element can push at least one metal electrode and at least one cooling body at least segmentally away from each other. The elastic element is compressed or pre-tightened in the closed state, such that it relaxes upon transitioning from the closed state to the open state, and at least one metal electrode and at least one cooling body move relative to each other. However, the at least one metal electrode and at least one cooling body can be configured such that, despite the relative movement that pushes the components away from each other, at least segments of the two components abut against each other and are thus thermally coupled. This relative movement between the at least one metal electrode and at least one cooling body enables segmental thermal coupling, allowing the at least one cooling body to be connected to and thereby cool the at least one metal electrode.
[0027] Preferably, at least one metal electrode and at least one cooling element are movable relative to each other in a direction of motion perpendicular to the longitudinal extension of the leg. The elastic element can cause relative movement between the at least one metal electrode and at least one cooling element. The direction of relative movement can therefore act in the direction of the elastic force or in the closing direction.
[0028] According to another advantageous aspect of this disclosure, at least one metal electrode and at least one cooling body may each have a side recess. The corresponding side recesses may be spaced apart from each other in the closed state and abut against each other in the open state. When these side recesses abut against each other, they can form a placement surface, at least segmentally, between the at least one metal electrode and the at least one cooling body. Through this placement surface, thermal energy can be transferred from the at least one metal electrode to the at least one cooling body. Therefore, the at least one metal electrode and the at least one cooling body can be thermally coupled to each other in the open state, and the at least one cooling body cools the at least one metal electrode.
[0029] Preferably, the side recess can restrict the relative movement between at least one metal electrode and at least one cooling element in the direction of movement. Therefore, the side recess can prevent at least one metal electrode and at least one cooling element from completely separating or separating due to elastic force. More precisely, thermal coupling between at least one metal electrode and at least one cooling element can be achieved through the placement surface of the side recess. Through this placement surface, at least one metal electrode can be cooled by at least one cooling element.
[0030] According to another advantageous aspect of this disclosure, the at least one metal electrode may include an electrode body having a contact surface and a first tooth having a number of first teeth. The first teeth may extend from the electrode body to a side opposite to the contact surface. That is, at least one metal electrode may have a base from which the first teeth extend. The first teeth may extend, in particular, in the direction of at least one cooling body. This allows for the provision of a tooth geometry prepared for connection with a corresponding tooth geometry of at least one cooling body (movably connected to each other).
[0031] The first tooth of the first tooth portion preferably has a first base segment and a first head segment, the first base segment preferably extending perpendicular to the electrode body, wherein the first head segment extends in a mushroom shape parallel to the electrode body from the first base segment. This means that the first base segment can extend perpendicular to the longitudinal extension direction of the cooling body or protrude perpendicularly from the cooling body. The first head segment can also extend perpendicular to the first base segment. Therefore, the first head segment can extend in the longitudinal extension of the leg.
[0032] According to another advantageous aspect of this disclosure, the at least one cooling body may include a base and a second tooth portion having a number of second teeth. The second teeth may extend from the base toward at least one metal electrode. The base of the at least one cooling body may be an extension of a leg or an extension of a connection between a handle and a jaw portion. The second teeth may extend perpendicularly from the base toward the metal electrode. Thus, a tooth geometry can be provided, which is prepared for movably connecting with a corresponding tooth geometry of the metal electrode.
[0033] Preferably, the second tooth may have a second base segment and a second head segment. The second base segment may preferably protrude perpendicularly from the base. The second head segment may extend outward in a mushroom shape parallel to the base, starting from the second base segment. Thus, the second base segment can protrude straight from the body of the coolant toward the metal electrode. Therefore, the longitudinal extension of the second head segment may be parallel to the base of the coolant or extend along the longitudinal direction of the leg. The first head segment and the second head segment together form one or more lateral recesses.
[0034] According to another advantageous aspect of this disclosure, the first tooth and the second tooth can engage with each other alternately. That is, the first tooth of the metal electrode can be arranged near the second tooth of the cooling body. Therefore, in the open state, the placement surface between at least one metal electrode and at least one cooling body can be increased.
[0035] Preferably, the first and second teeth mesh with each other such that the mushroom-shaped head segments abut against each other in the open state and form one or more (parallel) lateral recesses. This means that, in the open state, the mushroom-shaped head segments can form a common placement surface for thermal coupling. Conversely, in the closed state, the mushroom-shaped head segments can be spaced apart, such that at least one metal electrode and at least one cooling body are thermally decoupled. An air gap that induces thermal insulation can thus be constructed between the mushroom-shaped head segments.
[0036] In other words, the corresponding leg may have teeth that guide in the opening or corresponding teeth of the corresponding other part and form a lateral recess.
[0037] According to another advantageous aspect of this disclosure, viewed from the metal electrode in the direction of motion, a first head section of at least one metal electrode can be arranged after a second head section of at least one cooling body. Therefore, a lateral recess can be constructed between at least one metal electrode and at least one cooling body.
[0038] Preferably, each head segment can slide onto or be guided by the base segment of the corresponding tooth when the leg moves from the open state to the closed state. Therefore, at least one metal electrode and at least one cooling body can be movable relative to each other.
[0039] According to another advantageous aspect of this disclosure, at least one spacer, preferably configured in a triangular shape, may be arranged at at least one metal electrode and / or at at least one cooling body. The at least one spacer increases the distance between the at least one metal electrode and the at least one cooling body. Furthermore, this ensures that no direct contact is established between the at least one metal electrode and the at least one cooling body in the closed state. Direct contact can transfer heat energy, which is undesirable in the closed state. Here, the at least one spacer may also be configured in a prismatic shape.
[0040] According to another advantageous aspect of this disclosure, the at least one metal electrode can be supported on the rocker arm in such a way that the at least one metal electrode pivots away from the at least one cooling body as the leg moves from the open state to the closed state. That is, the metal electrode can be rotatably supported / arranged on the rocker arm and pivot about a point of rotation of the rocker arm. In the closed state, the metal electrode can be oriented such that the contact surface contacts the tissue to be sealed. Conversely, in the open state, the metal electrode can be oriented such that the metal electrode is cooled by the cooling body. The rocker arm can thus not only provide optimal orientation of the contact surface relative to the tissue, but also allow for a coupling connection between the metal electrode and the cooling body.
[0041] Preferably, the elastic force of the at least one elastic element can press the at least one metal electrode against the at least one cooling body in the open state. The at least one elastic element can be arranged about the rocker arm such that it presses the at least one metal electrode against the at least one cooling body. That is, the at least one elastic element can be arranged on one side of the rocker arm, wherein the elastic force of the elastic element acts on the metal electrode such that the metal electrode pivots about the rotation point of the rocker arm and presses against or presses against the cooling body on the other side of the rocker arm. Thus, in the open state of the jaws, the metal electrode can freely rotate about the rocker arm, contact the cooling body, and be cooled by the cooling body.
[0042] The contact surface between at least one metal electrode and at least one cooling body can be increased by using meshing or roughening (contact) surfaces to achieve more efficient heat transfer.
[0043] In the closed state, the elastic element can be compressed by the closing force of the jaws. This means that the elastic force can act essentially in opposition to the closing force of the jaws.
[0044] The jaws can have two metal electrodes (bipolar HF technology) or only one (metal) electrode (monopolar HF technology). In monopolar HF technology, the second (extraction) electrode can be secured to the patient's body.
[0045] Surgical instruments can be, in particular, electrosurgical instruments used in open surgery. However, these instruments can also be used in minimally invasive surgery. Attached Figure Description
[0046] Figure 1 A schematic diagram showing a surgical instrument in the open state according to a first embodiment of the present disclosure;
[0047] Figure 2 A detailed view of the jaw portion of a surgical instrument in the open state according to a first embodiment of the present disclosure is shown;
[0048] Figure 3 A detailed view of the jaw portion of a surgical instrument in a closed state according to a first embodiment of the present disclosure is shown.
[0049] Figure 4 A longitudinal cross-section of the jaw portion of a surgical instrument in a closed state according to a second embodiment of the present disclosure is shown; and
[0050] Figure 5 A longitudinal cross-section of the jaw portion of a surgical instrument in the open state according to a second embodiment of the present disclosure is shown. Detailed Implementation
[0051] Figure 1 A surgical instrument 1 is shown having a jaw portion 2 with two legs 4. The two legs 4 are movable relative to each other between an open or released state and a closed or clamping state of the jaw portion 2, wherein, Figure 1 A surgical instrument 1 in the open position is shown. The surgical instrument 1 also has two (scissor-type) handles 6 through which the user can move the legs 4. Each leg 4 of the jaw portion 2 has a metal electrode 8 and a cooling body 12. The metal electrode has a contact surface 10 for contacting tissue, and the cooling body is arranged on the side opposite to the contact surface 10. The cooling body 12 is connected to a corresponding handle 6. Each leg 4 has two elastic elements or springs 14 that press the cooling body 12 and the metal electrode 8 apart. In the open or released position, the legs of the instrument 1, and therefore the contact surfaces 10, are spaced apart from each other. This means that the two contact surfaces 10 are not adjacent to each other.
[0052] Figure 2 A detailed view of one leg of the leg 4 of the open jaw portion 2 is shown. The spring 14 is extended in the relaxed basic position. The metal electrodes 8 each have an electrode body 16 with a contact surface 10 and a first tooth 18. The first tooth 18 has a number of first teeth 20 extending from the electrode body 16 to a side opposite to the contact surface 10. Each tooth 20 has a first base section 22 and a first head section 24. The first base section 22 extends perpendicular to the electrode body 16, and the first head section 24 extends outward in a mushroom shape from the first base section 22. That is, the first head section 24 extends at least segmentally parallel to the electrode body 16.
[0053] The cooling body 12 has a base 26 and a second tooth 28 with a number of second teeth 30. The second teeth 30 extend from the base 26 toward at least one metal electrode 8. That is, the second teeth 30 extend from the base 26 to at least one metal electrode 8. Each second tooth 30 has a second base section 32, which preferably extends perpendicular to the base 26. Furthermore, each second tooth 30 has a second head section 34 that extends outward in a mushroom shape from the second base section 32. This means that the second head section 34 extends at least segmentally parallel to the base 26.
[0054] The first tooth 20 of the metal electrode 8 and the second tooth 30 of the cooling body 12 are arranged side by side (alternatingly) and mesh with each other. The teeth 18, 28 of the metal electrode 8 and the cooling body 12 are arranged such that the metal electrode 8 and the cooling body 12 can move relative to each other. Preferably, the metal electrode 8 and the cooling body 12 can move relative to each other in a direction of movement perpendicular to the longitudinal extension of the leg 4. During relative movement, the first mushroom-shaped head section 24 of the metal electrode 8 slides along the second base section 32 of the cooling body 12. Correspondingly, the second mushroom-shaped head section 34 slides along the first base section 22. The relative movement is limited by the two head sections 24, 34, which abut against each other and form a lateral concave shape when the jaw portion 2 is open.
[0055] The first mushroom-shaped head segment 24 and the second mushroom-shaped head segment 34 engage with each other to form a lateral concave shape, which defines the relative movement of at least one metal electrode 8 and at least one cooling body 12 in the direction of motion. Since the respective head segments 24 and 34 abut against each other, the respective teeth 20 and 30 have large placement surfaces relative to each other. Due to the large placement surfaces of the teeth 20 and 30, thermal energy can be transferred from the metal electrode 8 to the cooling body 12. This means that the metal electrode 8 and the cooling body 12 are thermally coupled in the open state. In this state, the cooling body 12 can receive thermal energy from the metal electrode 8 and therefore the metal electrode 8 can be cooled. Thus, in the open state, thermal energy is absorbed from the metal electrode 8 through the corresponding, abutting cooling body 12.
[0056] Surgical instrument 1 is particularly a high-frequency instrument for sealing tissue. To seal the tissue, the two legs 4 of the jaw portion 2 are pressed together and closed by a closing or clamping force. In the closed or clamped state, the tissue to be sealed is held between the two contact surfaces 10 and is permeated / flowed with a high-frequency current. This heats the tissue held between the two contact surfaces 10. Because water should evaporate from the tissue for sealing, a surface temperature of (at least) 100°C is required on the contact surfaces 10. The thermal coupling of the metal electrode 8 to the cooling body 12 draws a large amount of heat from the metal electrode 8 and prolongs the heating of the metal electrode 8. Therefore, the sealing process is inefficient.
[0057] Figure 3 A detailed view of one leg of the legs 4 of the closed jaw portion 2 is shown. When the jaw portion 2 is closed, the two contact surfaces 10 of the corresponding legs 4 abut against each other and are pressed together by the closing force. The two metal electrodes 8 should be heated so that the tissue arranged between the two metal electrodes 8 can be sealed by introducing heat energy. Therefore, the metal electrodes 8 and the cooling body 12 should be thermally decoupled in the closed state.
[0058] The closing force of the jaws compresses the spring 14 and moves the metal electrode 8 toward the cooling body 12. During the closing motion, the mushroom-shaped head sections 24, 34 slide along the base sections 22, 32 of the corresponding teeth 20, 30. In the closed state, the mushroom-shaped head sections 24, 34 no longer abut each other. This reduces the surface area between the metal electrode 8 and the cooling body 12. Therefore, there is less area for heat exchange between the metal electrode 8 and the cooling body 12. In other words, an air gap exists between the respective head sections 24, 34, and this air gap insulates the metal electrode 8 from the cooling body. Therefore, the metal electrode 8 can be heated without absorbing heat from the large (cooling) mass of the cooling body 12. Furthermore, the cooling body 12 has two triangular spacer members 36 placed on the metal electrode 8 and increasing the distance between the metal electrode 8 and the cooling body 12. One spacer member 36 is arranged on the distal end section of the jaws, and the other spacer member 36 is arranged on the proximal end section of the metal electrode 8. The spacer 36 is preferably made of a thermally insulating material such as ceramic.
[0059] Figure 4 The jaw portion 2 in a closed or clamping state is shown according to another embodiment of this disclosure. A metal electrode 8 (pivotibly) is supported on a rocker arm 38. When the jaw portion is in the closed or clamping state, the metal electrode 8 rests planar against another leg 40, which is preferably a neutral electrode. In the clamping state, the spring 14 is compressed by the closing or clamping force of the jaw portion 2. The metal electrode 8 has only minimal contact with the cooling body 12. Therefore, the metal electrode 8 can be effectively heated to seal the tissue. The other leg 40 is pivotable about a hinge 42 and applies the closing or clamping force to the metal electrode 8.
[0060] Figure 5 The jaw portion 2 in the open or released state is shown according to another embodiment. The legs 4 are spaced apart from each other. This means that the legs 40 pivot away from the metal electrode 8. This eliminates the need for a closing or clamping force acting on the metal electrode 8. The spring 14 relaxes to its basic position, and its elasticity causes the metal electrode 8 to pivot about the rotation point of the rocker arm 38. Thus, the metal electrode 8 is pressed against the cooling body 12 by the elasticity. Therefore, the metal electrode 8 can be cooled by the cooling body 12 in the open state. The contact surface or placement surface between the metal electrode 8 and the cooling body 12 may also have an engaging or rough surface to improve heat transfer.
[0061] Of course, the jaw portion 2 in the second embodiment may also have two metal electrodes 8 and therefore two cooling bodies 12. The jaw portion 2 may have two metal electrodes (bipolar HF technology) or only one electrode (monopolar HF technology).
[0062] List of reference numerals
[0063] 1. Instruments
[0064] 2. Jaw section
[0065] 4 legs
[0066] 6 handles
[0067] 8 Metal Electrodes
[0068] 10 Contact surfaces
[0069] 12 cooling body
[0070] 14. Elastic elements / springs
[0071] 16 Electrode Body
[0072] 18 First tooth
[0073] 20 First tooth
[0074] 22 First base section
[0075] 24 First head section
[0076] 26 matrix
[0077] 28 Second tooth
[0078] 30 Second tooth
[0079] 32 Second base section
[0080] 34 Second Head Section
[0081] 36 Spacer retainer
[0082] 38 joysticks
[0083] 40 The other leg
[0084] 42. Hinges.
Claims
1. A surgical instrument (1), particularly an HF instrument, having a jaw portion (2) with two legs (4) movable relative to each other between an open state and a closed state of the jaw portion (2), in, The jaw portion (2) has at least one metal electrode (8) with a contact surface (10) for contacting tissue and a cooling body (12) facing away from the contact surface (10). Its features are, In the closed state, the at least one metal electrode (8) and the at least one cooling body (12) are spaced apart and thermally separated, and in the open state, the at least one metal electrode (8) and the at least one cooling body (12) are thermally connected to each other.
2. The device (1) according to claim 1, characterized in that... At least one elastic element (14), in particular a spring, is compressed in the closed state by the closing force of the jaw portion (2) and causes the at least one metal electrode (8) and the at least one cooling body (12) to move relative to each other when the closing force disappears.
3. The device (1) according to claim 2, characterized in that, The at least one elastic element (14) pushes the at least one metal electrode (8) and the at least one coolant (12) apart from each other.
4. The apparatus (1) according to any one of claims 1 to 3, characterized in that, The at least one metal electrode (8) and the at least one cooling body (12) are capable of moving relative to each other in a direction of motion perpendicular to the longitudinal extension of the leg (4).
5. The apparatus (1) according to any one of claims 1 to 4, characterized in that, The at least one metal electrode (8) and the at least one cooling body (12) each have at least one side recess, wherein the corresponding side recesses are spaced apart from each other in the closed state and abut against each other in the open state.
6. The device (1) according to claim 5, characterized in that, The lateral recess defines the relative movement between the at least one metal electrode (8) and the at least one cooling body (12) in the direction of movement.
7. The apparatus (1) according to any one of claims 1 to 6, characterized in that, The at least one metal electrode (8) has an electrode body (16) with a contact surface (10) and a first tooth portion (18) with a certain number of first teeth (20), the first teeth extending from the electrode body (16) to a side away from the contact surface (10).
8. The device (1) according to claim 7, characterized in that, The first tooth (20) of the first tooth portion (18) has a first base section (22) and a first head section (24), wherein the first base section preferably extends perpendicular to the electrode body (16), and the first head section (24) extends in a mushroom shape parallel to the electrode body (16) from the first base section (22).
9. The apparatus (1) according to any one of claims 1 to 8, characterized in that, The at least one cooling body (12) has a base (26) and a second tooth (28) with a number of second teeth (30) extending from the base (26) toward the at least one metal electrode (8).
10. The device (1) according to claim 9, characterized in that, The second tooth (30) has a second base section (32) and a second head section (34), the second base section preferably extending perpendicular to the base (26), wherein the second head section (34) extends in a mushroom shape parallel to the base (26) from the second base section (32).
11. The HF device (1) according to claim 9 or 10, characterized in that, The first tooth (20) and the second tooth (30) engage with each other alternately.
12. The HF device (1) according to claim 10 or 11, characterized in that, The first tooth (20) and the second tooth (30) mesh with each other such that the mushroom-shaped head sections (24, 34) abut against each other in the open state and form a lateral concave shape, and are spaced apart from each other in the closed state.
13. The apparatus (1) according to any one of claims 1 to 12, characterized in that, At least one spacer (36) with a preferred triangular structure is arranged on the at least one metal electrode (8) and / or on the at least one cooling body (12).
14. The apparatus (1) according to any one of claims 1 to 4, characterized in that, The at least one metal electrode (8) is supported on the rocker arm (38) such that the at least one metal electrode (8) pivots away from the at least one cooling body (12) when the leg (4) moves from the open state to the closed state.
15. The device (1) according to claim 14, characterized in that, The elastic force of the elastic element (14) causes the at least one metal electrode (8) to pivot around the rocker arm (38) and press against the at least one cooling body (12) in the open state.