Operating forceps

Abstract

The utility model provides a pair of surgical forceps. The operating forceps comprise an operating forceps main body and a heating unit, and the operating forceps main body comprises two clamping arms which can be opened and closed and are used for clamping target tissues; the heating unit is used for being electrically connected with a power source, the heating unit is arranged at the position of at least one clamping arm and extends in the length direction of the clamping arm, the heating unit comprises a resistor disc, a plurality of holes are formed in the resistor disc, and the holes are distributed according to a preset pattern; therefore, the resistor disc has a preset resistance value corresponding to the plurality of holes arranged according to a preset pattern. According to the application, the resistor disc is used as a heating unit for cutting and hemostasis of the target tissue, and the plurality of holes are formed in the resistor disc according to the preset pattern, so that the resistance value of each part on the resistor disc can be designed, the temperature of each position on the resistor disc can be controlled, local accurate temperature control can be realized, and thermal damage can be reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a surgical forceps. Background Technology

[0002] Thermal energy, as an efficient and reliable method of cutting and hemostasis, is widely used in surgical procedures. Current energy surgery often employs monopolar ablation electrodes, plasma electrosurgical units, or ultrasonic scalpels to cut, separate, or stop bleeding in target tissues.

[0003] However, monopolar ablation electrodes, plasma electrosurgical units, or ultrasonic scalpels cannot precisely control the temperature of the cutting head, which may cause tissue thermal damage or eschar formation at the wound site while achieving tissue cutting and hemostasis. Utility Model Content

[0004] This application addresses the shortcomings of existing methods by proposing a surgical forceps to solve the technical problem of the inability to precisely control the temperature of the cutting head in related technologies.

[0005] This application provides a surgical forceps, including:

[0006] The main body of the surgical forceps includes two openable and closable clamping arms for clamping target tissue;

[0007] A heating unit, for electrical connection to a power source, is disposed at at least one of the clamping arms and extends along the length of the clamping arm. The heating unit includes a resistive sheet with a plurality of holes arranged in a predetermined pattern, such that the resistive sheet has a predetermined resistance value corresponding to the plurality of holes arranged in the predetermined pattern.

[0008] Optionally, the plurality of holes are uniformly distributed, gradient distributed, or non-uniformly distributed on the resistive sheet.

[0009] Optionally, when the plurality of holes are non-uniformly distributed on the resistor sheet, the distribution density of the plurality of holes at both ends along the length direction of the resistor sheet is greater than the distribution density in the middle of the resistor sheet.

[0010] Optionally, the surgical forceps further includes at least one of the following:

[0011] The shape of the hole includes at least one of rectangle, square, circle, ellipse and oblong;

[0012] The shapes of the multiple holes on the resistor sheet are all the same, or partially the same;

[0013] The multiple holes are arranged in an array or in a grid pattern.

[0014] Optionally, the surgical forceps further comprises at least one of the following:

[0015] The hole is made by laser etching, semiconductor patterning process or printing process.

[0016] The thickness of the resistance sheet matches the predetermined resistance value.

[0017] Optionally, the heating unit further comprises a substrate arranged on one side of the resistance sheet, the substrate is made of insulating material, and the substrate is consistent in shape with the resistance sheet.

[0018] Optionally, the heating unit further comprises a protective layer arranged on the side of the resistance sheet away from the substrate, the protective layer is made of insulating material, and the protective layer is consistent in shape with the resistance sheet.

[0019] Optionally, the number of the heating units is one, and one heating unit is arranged on any one of the clamping arms.

[0020] The clamping arm comprises a first clamping arm which is flat and a second clamping arm which is arc-shaped and protrudes away from the first clamping arm; two opposite clamping seats are arranged on the first clamping arm in a plane perpendicular to the first clamping arm; the clamping seats extend along the first clamping arm, and the heating unit is clamped between the two clamping seats.

[0021] Optionally, the number of the heating units is one or two, and the heating units are arranged inside one or two of the clamping arms.

[0022] Each clamping arm comprises a base and a heat insulation pad, the base is provided with a first limiting groove, the heating unit is clamped in the first limiting groove, and the top surface of the heating unit is not higher than the groove of the first limiting groove.

[0023] Optionally, the surgical forceps further comprises a holding handle, the holding handle is provided with a trigger switch, a trigger and an angle adjusting wheel.

[0024] The trigger switch is electrically connected with the heating unit, and is used to turn on or turn off the electrical connection between the heating unit and the power supply.

[0025] The trigger is used to drive the clamping arm to open and close.

[0026] The angle adjusting wheel is rotatably arranged on the holding handle, is inserted and matched with the rod part of the surgical forceps main body, and is used to adjust the clamping angle of the clamping arm.

[0027] The technical scheme provided by the embodiments has the beneficial technical effects including:

[0028] In this embodiment, the resistive element is designed as the heating unit of the surgical forceps. Multiple holes are created in the resistive element, forcing the current to bypass and form a circuitous path. By designing the arrangement of these holes according to a predetermined pattern, and by designing parameters such as the arrangement pattern, density, and spacing, the equivalent resistance of different areas within the resistive element can be differentially adjusted. This allows for the design of the resistance value at each location within the resistive element, i.e., the resistance distribution within the resistive element. After the resistive element is energized, different temperatures can be generated at locations with different resistance values ​​based on the hole pattern (i.e., resistance distribution). This enables precise power distribution at local locations within the resistive element under the same voltage, allowing for differentiated heating power settings for different areas of the surgical forceps (such as the tip and edge). This meets the temperature gradient requirements in complex surgeries, achieving precise local temperature control and reducing thermal damage to the target tissue.

[0029] The embodiments of this application can also flexibly configure the resistor sheet according to the surgical needs. That is, the resistor sheet with a resistance value that meets the surgical needs can be installed in surgical forceps or scalpels with different functions, so that the resistor sheet can achieve multiple functions such as cutting, coagulation, and hemostasis.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of a surgical forceps provided in an embodiment of this application;

[0033] Figure 2 Examples of this application Figure 1 A magnified view of a portion of point A in the middle;

[0034] Figure 3 Examples of this application Figure 2 A schematic diagram of the structure of the first clamping arm in the middle;

[0035] Figure 4 This is a schematic diagram of the structure of a heating unit provided in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of another heating unit provided in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of another type of surgical forceps provided in an embodiment of this application;

[0038] Figure 7 For the embodiment of the present application Figure 6 A local enlarged schematic view at B in the embodiment of the present application.

[0039] Figure 8 For the embodiment of the present application Figure 6 An exploded schematic view of the clamping arm in the embodiment of the present application.

[0040] Explanation of reference signs:

[0041] 10 - surgical forceps body;

[0042] 11 - clamping arm;

[0043] 111 - base; 1111 - first limiting groove;

[0044] 112 - heat insulation pad; 113 - tooth block;

[0045] 114 - first clamping arm; 1141 - second limiting groove;

[0046] 115 - second clamping arm; 116 - clamping seat;

[0047] 12 - rod portion;

[0048] 20 - heating unit; 21 - resistance sheet; 211 - hole; 22 - base plate; 23 - power supply wire; 24 - positioning block;

[0049] 30 - holding handle; 40 - trigger; 50 - trigger switch; 60 - angle adjusting wheel. DETAILED DESCRIPTION

[0050] The embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions of the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0051] Those skilled in the art can understand that, unless specifically stated otherwise, "said" and "the" used herein can also include plural forms. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0052] In order to make the purposes, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below in conjunction with the accompanying drawings.

[0053] In the related art, monopolar ablation electrodes, plasma knives or ultrasonic knives are often used in energy surgery to cut and separate or stop bleeding of target tissues. The monopolar ablation electrode generates heat energy in biological tissues through high-frequency current to achieve tissue ablation. The plasma knife generates low-temperature plasma through ionized gas (such as argon), and uses the charged particles to interact with tissues to achieve cutting, ablation or hemostasis. The ultrasonic knife uses high-frequency mechanical vibration to break the hydrogen bonds of tissue proteins to produce coagulation and cutting effects.

[0054] Based on the principles of tissue ablation or cutting of monopolar ablation electrodes, plasma knives and ultrasonic knives, the current monopolar ablation electrodes, plasma knives or ultrasonic knives cannot accurately control the temperature of the knife head, which may cause tissue thermal damage or scab at the wound site while achieving tissue cutting and hemostasis.

[0055] To solve the above technical problems, with reference to Figures 1-8 The embodiments of the present application provide a surgical forceps, which comprises a surgical forceps body 10 and a heating unit 20 arranged on the surgical forceps body 10.

[0056] With reference to Figures 1-2 The surgical forceps body 10 comprises two clamping arms 11 which are arranged to be openable and closable and used for clamping target tissues. The surgical forceps body 10 further comprises a rod portion 12, and the two clamping arms 11 are arranged at one end of the rod portion 12.

[0057] With reference to Figures 3-5 The heating unit 20 is used for electrical connection with a power supply, and is arranged at at least one clamping arm 11 and extends along the length direction of the clamping arm 11. The heating unit 20 comprises a resistance sheet 21, and a plurality of holes 211 are arranged on the resistance sheet 21. The plurality of holes 211 are arranged according to a predetermined pattern, so that the resistance sheet 21 has a predetermined resistance value corresponding to the plurality of holes 211 arranged according to the predetermined pattern.

[0058] The embodiment of the application designs the resistance sheet 21 as the main heating unit 20 of the surgical forceps, and a plurality of holes 211 are formed on the resistance sheet 21. The existence of the holes 211 forces the current to detour, forming a detour path. By designing the plurality of holes 211 to be arranged in a predetermined pattern, and designing the arrangement pattern, arrangement density and arrangement spacing of the plurality of holes 211, the equivalent resistance of different regions in the resistance sheet 21 can be differentially adjusted, and then the resistance of each position of the resistance sheet 21 can be designed, that is, the resistance distribution in the resistance sheet 21 can be designed. After the resistance sheet 21 is powered on, different temperatures can be generated at positions with different resistances of the resistance sheet 21 according to the pattern arrangement of the holes 211 (that is, the resistance distribution), and the fine distribution of the power of the local position of the resistance sheet 21 can be realized under the same voltage, and then the different regions (such as the tip and the edge) of the surgical forceps can be set to have different heating powers, so as to meet the demand for temperature gradient in complex surgery, realize local precise temperature control, and reduce thermal damage to the target tissue.

[0059] The embodiment of the application can also flexibly configure the resistance sheet 21 according to the surgical demand, that is, the resistance sheet 21 with a resistance value designed to meet the surgical demand can be installed into surgical forceps or surgical knives with different functions, so that the resistance sheet 21 can realize multiple functions such as cutting, coagulation and hemostasis.

[0060] Optionally, referring to Figures 4-5 The plurality of holes 211 are uniformly distributed, gradiently distributed or non-uniformly distributed on the resistance sheet 21.

[0061] The distribution mode of the holes 211 will directly affect the current path, and then affect the temperature field distribution on the resistance sheet 21. By designing different arrangement modes of the plurality of holes 211, the local conductivity and heat conduction characteristics of the resistance sheet 21 can be adjusted, and then diversified clinical demands can be adapted.

[0062] Specifically, the plurality of holes 211 are uniformly distributed on the resistance sheet 21, so that the joule heat distribution at each position on the resistance sheet 21 is more uniform, and local overheating is avoided. For example, when the planar region of the surgical forceps needs to be uniformly heated in a large area, the plurality of holes 211 are uniformly distributed, so that the temperature at each position on the resistance sheet 21 is consistent, and the risk of tissue carbonization can be reduced.

[0063] The plurality of holes 211 are gradiently distributed on the resistance sheet 21, and the resistance value continuously changes with the spatial position through the density gradient design of the holes 211, so as to realize the natural transition from the high-temperature region to the low-temperature region. For example, in the blood vessel closure surgery, the center temperature of the resistance sheet 21 designed through the density gradient design of the holes 211 is relatively high to quickly coagulate blood, and the edge temperature of the resistance sheet 21 is relatively low to protect the blood vessel wall.

[0064] The non-uniform distribution of the plurality of holes 211 on the resistance sheet 21 can be customized according to functional requirements. By combining the local dense holes 211 and the non-hole area, the precise coexistence of high-temperature and low-temperature zones can be achieved. For example, in neurosurgery, multiple independent high-temperature points are generated simultaneously for hemostasis, and the low-temperature zone avoids nerve damage.

[0065] Optionally, referring to Figures 4-5 When the plurality of holes 211 are non-uniformly distributed on the resistance sheet 21, the distribution density of the plurality of holes 211 at both ends of the resistance sheet 21 in the length direction is greater than the distribution density of the plurality of holes 211 in the middle of the resistance sheet 21.

[0066] By setting the distribution density of the holes 211 in the two side regions of the resistance sheet 21 to be greater than the distribution density of the holes 211 in the central region of the resistance sheet 21, the impedance at both ends of the resistance sheet 21 is greater than the impedance in the center, and under the same current, the temperature at both ends of the resistance sheet 21 is higher, and the temperature in the central region is lower. In actual application, the high-density holes 211 at both ends of the resistance sheet 21 can be used for high-frequency cutting, and the low-density hole 211 region in the middle can pass low-frequency current to assist hemostasis, thereby realizing one device with multiple functions and improving cutting and hemostasis efficiency.

[0067] Optionally, the shape of the hole 211 includes at least one of a rectangle, a square, a circle, an ellipse, and an oblong.

[0068] The shape of the hole 211 can be any shape. In order to facilitate processing and arrange the pattern of the plurality of holes 211, the present application only takes the design of the hole 211 as a circle and an oblong as an example for description.

[0069] Optionally, the shapes of the plurality of holes 211 can be uniform or partially uniform.

[0070] Designing the plurality of holes 211 as uniform shapes facilitates processing, improves processing efficiency, and reduces processing costs. Designing the plurality of holes 211 as partially uniform shapes can achieve resistance gradient, thermal management partition, and mechanical performance optimization through shape combination, which adapts to complex surgical requirements. For example, high-resistance shapes (such as long and narrow strip-shaped holes) are used in key areas, and low-resistance shapes (such as circular holes) are used in other areas, which can achieve local high-temperature focusing in key areas.

[0071] Optionally, referring to Figures 4-5 , the plurality of holes 211 are arranged in an array or in a grid shape.

[0072] Optionally, the hole 211 is made by laser etching, semiconductor patterning process, or printing process.

[0073] Optionally, the thickness of the resistance sheet 21 is matched with the predetermined resistance value. In turn, the resistance sheet 21 with different thicknesses can be selected according to the required resistance value of the resistance sheet 21.

[0074] Optionally, referring to Figures 4-5 , the heating unit 20 further comprises a substrate 22 arranged on one side of the resistance sheet 21, the substrate 22 is made of insulating material, and the substrate 22 is consistent with the shape of the resistance sheet 21.

[0075] The substrate 22 made of insulating material is used to support the resistance sheet 21, which can improve the mechanical strength of the heating unit 20.

[0076] Optionally, the material of the resistance sheet 21 includes but is not limited to metal, alloy, conductive ceramic and other conductive materials, and the appropriate material can be selected according to the resistivity requirement of the resistance sheet 21; the material of the substrate 22 includes but is not limited to ceramic, glass or polymer.

[0077] Optionally, referring to Figure 4 and Figure 5 , in actual application, the thickness of the resistance sheet 21 and the substrate 22 is relatively thin.

[0078] When the substrate 22 is made of ceramic material such as aluminum nitride ceramic, the substrate 22 can act as a heat conduction medium to quickly conduct the Joule heat generated by the resistance sheet 21 to the target tissue, thereby facilitating the cutting and hemostasis of the target tissue and improving the cutting and hemostasis efficiency.

[0079] Optionally, the heating unit 20 further comprises a protective layer (not shown in the figure), which is arranged on the side of the resistance sheet 21 away from the substrate 22, the protective layer is made of insulating material, and the shape of the protective layer is consistent with the shape of the resistance sheet 21.

[0080] The protective layer is arranged on the surface of the resistance sheet 21, which is used to protect the resistance sheet 21 and can prevent the direct contact between the resistance sheet 21 and the surrounding tissue or metal parts of the instrument, thereby preventing the leakage current from causing non-target tissue burns or circuit short circuit.

[0081] Optionally, the resistance sheet 21 is electrically connected with the power supply through a power line 23, and the power line 23 is connected to any one end along the length direction of the resistance sheet 21.

[0082] Optionally, referring to Figures 1-5 In an optional embodiment, the number of the heating unit 20 is one, and one heating unit 20 is arranged on any one of the clamping arms 11.

[0083] The clamping arm 11 comprises a first clamping arm 114 which is flat and a second clamping arm 115 which is arc-shaped and protrudes away from the first clamping arm 114. In a plane perpendicular to the first clamping arm 114, two clamping seats 116 are arranged oppositely on the first clamping arm 114, and the heating unit 20 is clamped between the two clamping seats 116.

[0084] The heating unit 20 is arranged on the first clamping arm 114 which extends horizontally at the end, and is located on the side of the first clamping arm 114 facing the second clamping arm 115. In actual application, the first clamping arm 114 which extends horizontally at the end is used as the bottom clamping arm 11, and is usually placed below the target tissue, so as to facilitate the application of heat energy to the target tissue. The second clamping arm 115 which is arc-shaped and protrudes away from the first clamping arm 114 is used as the top clamping arm 11, and is usually placed above the target tissue, so as to facilitate the provision of clamping force to the target assembly and guarantee the clamping stability of the target tissue.

[0085] In the present application, the plane perpendicular to the first clamping arm 114 is a vertical plane, and the two clamping seats 116 are arranged oppositely along the vertical plane, so as to guarantee the horizontal arrangement of the heating unit 20 and guarantee the sufficient contact area between the heating unit 20 and the target tissue.

[0086] Optionally, referring to Figures 4-5 A positioning block 24 can also be arranged on the side of the substrate 22 away from the resistance sheet 21, and a positioning groove matching the positioning block 24 is arranged on the inner side of one of the clamping seats 116, so as to facilitate the quick positioning of the installation position of the heating unit 20 and guarantee the installation precision of the heating unit 20, thereby improving the accuracy of the application of heat energy to the target tissue by the heating unit 20. The positioning block 24 can be arranged at various positions of the substrate 22, and the present application is only described by taking the example that the positioning block 24 is arranged at the end of the substrate 22 away from the power line 23. Moreover, the size of the positioning block 24 is not specifically limited, and in actual application, the smaller the size of the positioning block 24 is, the better, so as to avoid great influence on the volume and weight of the heating unit 20.

[0087] Optionally, referring to Figure 3 A second limiting groove 1141 for limiting the clamping seat 116 is arranged on the first clamping arm 114, and the second limiting groove 1141 extends along the length direction of the first clamping arm 114.

[0088] By arranging the second limiting groove 1141 on the inner side of the first clamping arm 114, the clamping seat 116 and the heating unit 20 can be limited, so as to avoid the displacement of the clamping seat 116 and the heating unit 20 during the operation. The inner wall of the second limiting groove 1141 matches the outer wall of the base 111 in shape, so as to limit the clamping seat 116 and the heating unit 20 and provide a containing space for the clamping seat 116.

[0089] In the present application, with reference to Figures 2-3 , the inner wall of the second limiting groove 1141 is designed in a U shape, and the outer wall of the clamping seat 116 is also designed in a U shape, so that the two oppositely arranged clamping seats 116 combine to form a cylindrical body.

[0090] Optionally, the clamping seat 116 can be inserted and fitted in the second limiting groove 1141 of the first clamping arm 114 or the second clamping arm 115, thereby realizing detachable connection and facilitating replacement of the heating unit 20 of different resistance values, and improving the utilization rate of the surgical forceps body 10.

[0091] Optionally, with reference to Figures 6-8 , in another optional embodiment, the number of the heating units 20 is two, and the two heating units 20 are arranged inside the two clamping arms 11. Each clamping arm 11 includes a base 111 and a heat insulation pad 112, and the base 111 is provided with a first limiting groove 1111 for limiting the heating unit 20, and the heating unit 20 is clamped in the first limiting groove 1111, and the top surface of the heating unit 20 is not higher than the groove of the first limiting groove 1111. Of course, the heating unit 20 can also be provided with only one, and one heating unit 20 is arranged inside one of the clamping arms 11, which can be adjusted according to the heating power required in the actual application.

[0092] In the embodiment of the present application, the heating unit 20 is arranged in each of the two clamping arms 11, and the two clamping arms 11 can uniformly apply heat energy to the target tissue, which is suitable for the use scenario of hemostasis of the target tissue, and can improve the hemostasis efficiency.

[0093] By arranging each clamping arm 11 in a split type, i.e., including a base 111 and a heat insulation pad 112, it is convenient to arrange the accommodation space of the heating unit 20 in the clamping arm 11, so that no additional mounting structure is needed, which can reduce the volume and weight of the clamping arm 11, and further reduce the volume and weight of the surgical forceps body 10, thereby improving the cutting and hemostasis precision of the target assembly.

[0094] By opening the first limiting groove 1111 on the base 111, the heating unit 20 can be limited, avoiding the heating unit 20 from moving between the base 111 and the heat insulation pad 112, and ensuring the accuracy of the heating unit 20 in applying heat energy to the target tissue. By arranging the top surface of the heating unit 20 not to protrude from the groove of the first limiting groove 1111, when the heat insulation pad 112 covers the base 111, the heating unit 20 can be completely wrapped inside the clamping seat 116, avoiding the interference of the external environment on the heating unit 20, and improving the accuracy of the heating unit 20 in applying heat energy to the target tissue.

[0095] In actual application, the two bases 111 of the clamping arms 11 are oppositely arranged and located below the heat generating unit 20 for clamping the target tissue; the two heat insulation pads 112 of the clamping arms 11 are oppositely arranged and located above the heat generating unit 20 for protecting other tissues of the patient from being burned by the heat energy of the heat generating assembly.

[0096] Optionally, referring to Figures 7-8 , in order to improve the clamping stability of the target assembly between the two bases 111, a plurality of tooth blocks 113 are integrally arranged on the side of the base 111 away from the heat insulation pad, and the plurality of tooth blocks 113 are uniformly distributed on the base 111. The cross-sectional area of the plurality of tooth blocks 113 away from the base 111 is smaller than the cross-sectional area close to the base 111, so as to facilitate improving the clamping ability of the tooth blocks 113 to the target tissue, and also can increase the contact area of heat energy conduction and improve the closing effect.

[0097] Optionally, referring to Figure 1 and Figure 6 , the surgical forceps further comprise a holding handle 30, and the holding handle 30 is provided with a trigger switch 50, a trigger 40 and an angle adjusting wheel 60.

[0098] The trigger switch 50 is electrically connected with the heat generating unit 20, and is used for conducting or breaking the electrical connection between the heat generating unit 20 and the power supply. The trigger 40 is used for driving the clamping arms 11 to open and close. The angle adjusting wheel is rotatably arranged on the holding handle 30 and is inserted and matched with the rod part 12 of the surgical forceps body 10, and is used for adjusting the clamping angle of the clamping arms 11.

[0099] In clinical surgery, after the doctor holds the holding handle 30 to clamp the tissue, the trigger switch 50 is triggered, and the power supply current provided by the generator is adopted. The current passes through the designed heat unit belt, and the heat unit belt generates heat according to the design requirement, so as to realize the required heat distribution in the clamping arm 11, thereby realizing the cutting and hemostasis effect of the tissue.

[0100] The technical scheme provided by the embodiment of the application has the beneficial technical effects including:

[0101] By designing the resistance sheet 21 as the main heating unit 20 of the surgical forceps, by opening a plurality of holes 211 on the resistance sheet 21, the existence of the holes 211 will force the current to detour, forming a detour path. By designing the plurality of holes 211 to be arranged in a predetermined pattern, and designing the arrangement pattern, arrangement density and arrangement spacing of the plurality of holes 211 and other parameters, the equivalent resistance of different regions in the resistance sheet 21 can be differentially adjusted, and then the resistance of each position of the resistance sheet 21 can be designed, that is, the resistance distribution in the resistance sheet 21 can be designed. After the resistance sheet 21 is powered on, different temperatures can be generated at different resistance positions of the resistance sheet 21 according to the pattern arrangement of the holes 211 (that is, the resistance distribution), and the fine allocation of the power of the local position of the resistance sheet 21 can be realized under the same voltage. In turn, different heating powers can be set for different regions (such as the tip and the edge) of the surgical forceps to meet the demand for temperature gradient in complex surgery, and local precise temperature control can be realized to reduce thermal damage to the target tissue.

[0102] The embodiment of the present application can also flexibly configure the resistance sheet 21 according to the surgical requirements, that is, the resistance sheet 21 with resistance and resistance design meeting the surgical requirements can be installed into surgical forceps or surgical knives with different functions, so that the resistance sheet 21 can realize cutting, coagulation, hemostasis and other functions.

[0103] By setting the distribution density of the holes 211 in the two side regions of the resistance sheet 21 to be greater than the distribution density of the holes 211 in the central region of the resistance sheet 21, the impedance of the two ends of the resistance sheet 21 is greater than the impedance of the center, and under the same current, the temperature of the two ends of the resistance sheet 21 will be higher, and the temperature of the central region will be lower. In this way, it is ensured that in actual operation, the blood vessels on both sides of the tissue are closed first to reduce bleeding.

[0104] By setting each clamping arm 11 as a split type, that is, including a base 111 and a heat insulation pad 112, it is convenient to set a containing space for the heating unit 20 in the clamping arm 11, so that additional mounting structures are not needed, the volume and weight of the clamping arm 11 can be reduced, and in turn the volume and weight of the surgical forceps main body 10 can be reduced, thereby improving the cutting and hemostasis precision of the target assembly.

[0105] In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are exemplary directions or positional relationships shown based on the drawings, and are for the convenience of description or simplification of the description of the embodiments of the present application, and do not indicate or imply that the indicated devices or components must have a particular orientation, or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0106] The terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0107] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0108] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0109] The above is only part of the embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical concept of the present application, other similar implementation means based on the technical idea of the present application also belong to the protection scope of the embodiments of the present application.

Claims

1. A surgical forceps, characterized in that, include: The main body of the surgical forceps includes two openable and closable clamping arms for clamping target tissue; A heating unit, for electrical connection to a power source, is disposed at at least one of the clamping arms and extends along the length of the clamping arm. The heating unit includes a resistive sheet with a plurality of holes arranged in a predetermined pattern, such that the resistive sheet has a predetermined resistance value corresponding to the plurality of holes arranged in the predetermined pattern.

2. The surgical forceps according to claim 1, characterized in that, The plurality of holes are uniformly distributed, gradient distributed, or non-uniformly distributed on the resistive sheet.

3. The surgical forceps according to claim 2, characterized in that, When the plurality of holes are non-uniformly distributed on the resistor sheet, the distribution density of the plurality of holes at both ends along the length of the resistor sheet is greater than the distribution density in the middle of the resistor sheet.

4. The surgical forceps according to claim 2, characterized in that, It also includes at least one of the following: The shape of the hole includes at least one of rectangle, square, circle, ellipse and oblong; The shapes of the multiple holes on the resistor sheet are all the same, or partially the same; The multiple holes are arranged in an array or in a grid pattern.

5. The surgical forceps according to claim 1, characterized in that, It also includes at least one of the following: The holes are made by laser etching, semiconductor patterning, or printing processes. The thickness of the resistor sheet is matched with the predetermined resistance value.

6. The surgical forceps according to claim 1, characterized in that, The heating unit also includes a substrate disposed on one side of the resistive sheet. The substrate is made of insulating material and has the same shape as the resistive sheet.

7. The surgical forceps according to claim 6, characterized in that, The heating unit further includes a protective layer, which is disposed on the side of the resistive element away from the substrate. The protective layer is made of an insulating material and its shape is consistent with that of the resistive element.

8. The surgical forceps according to claim 1, characterized in that, The number of heating units is one, and one heating unit is disposed on any of the clamping arms; The clamping arm includes a straight first clamping arm and a second clamping arm that is curved in an arc shape and protrudes away from the first clamping arm; in a plane perpendicular to the first clamping arm, two opposing clamping seats are stacked on the first clamping arm; the clamping seats extend along the first clamping arm, and the heating unit is clamped between the two clamping seats.

9. The surgical forceps according to claim 1, characterized in that, The number of heating units is one or two, and the heating units are arranged inside one or two clamping arms; Each of the clamping arms includes a base and a heat insulation pad. The base has a first limiting groove, and the heating unit is snapped into the first limiting groove. The top surface of the heating unit is not higher than the opening of the first limiting groove.

10. The surgical forceps according to claim 1, characterized in that, It also includes a grip handle, which is equipped with an activation switch, a trigger, and an angle adjustment wheel; The activation switch is electrically connected to the heating unit and is used to connect or disconnect the electrical connection between the heating unit and the power supply. The trigger is used to drive the clamping arm to open and close; The angle adjustment wheel is rotatably mounted on the grip handle and is inserted into the rod of the surgical forceps body to adjust the clamping angle of the clamping arm.

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