Medical instruments

Abstract

[Problem] In common surgical procedures, a plurality of instruments are required for a plurality of operations including the crushing of an affected part (e.g., a tumor, a liver parenchyma), the subsequent irradiation of the affected part (i.e., the crushed affected part) with microwaves, and the subsequent excision, of the coagulated affected part that has been subjected to the irradiation with the microwaves, with scissors, a scalpel or the like. In addition, there is a problem that, when the affected part is cut before being coagulated, blood gushes due to the damage of blood vessels or the like, and therefore surgery becomes difficult. [Solution] A medical treatment tool according to the present disclosure has a mechanism (a blade protrusion mechanism) that prevents a blade from coming into contact with an affected part during the irradiation with microwaves and allows the blade to protrude from a cutting board after the irradiation. As a result, it has been confirmed that the above-mentioned problems are solved by the medical treatment tool, and the present invention is accomplished.

Description

Technical Field

[0001] The present disclosure relates to a microwave-irradiable medical treatment device having a blade protruding mechanism. This application claims the priority of Japanese Application No. 2023-145692, which is hereby incorporated by reference.

Background Art

[0002] (Device Using Microwaves) It is known that microwaves can coagulate (fixate) living tissues such as the digestive organs, liver, bladder, prostate, uterus, blood vessels, and intestinal tract at low temperatures. And various devices for surgical support using microwaves have been developed.

[0003] (Prior Art Documents) The following have been reported as devices using microwaves. Patent Document 1 discloses "a microwave device capable of irradiating microwaves, including a central conductor that transmits the microwaves, an insulator that covers the central conductor, and an outer conductor that covers the insulator, wherein the central conductor is first exposed outside the foremost end portion of the microwave device, and the externally exposed portion of the exposed central conductor is bent along the outer conductor toward the base end portion side of the microwave device." This patent document does not disclose the configuration of the blade protruding mechanism of the medical treatment device of the present disclosure.

[0004] Patent Document 2 discloses "an organ dissection tool including a brush-like structure capable of irradiating microwaves and / or a brush-like structure capable of serving as a receiver of microwaves." This patent document does not disclose the configuration of the blade protruding mechanism of the medical treatment device of the present disclosure.

[0005] Patent Document 3 discloses a medical treatment device comprising: a first electrode including a microwave receiver antenna; a second electrode including a microwave application antenna including an insulator, wherein the insulator is installed on the surface facing the microwave receiver antenna; a coaxial cable or semi-rigid cable including a central conductor and an outer conductor, wherein the tip of the central conductor and the tip of the outer conductor are directly or indirectly connected to the end of the microwave application antenna and the end of the microwave receiver antenna, respectively; a microwave transmission coaxial cable; a holder cover, wherein the holder cover houses the microwave application antenna and a part of the end of the microwave receiver antenna; and an inner projection of the microwave application antenna, wherein the projection extends toward the inside of the holder cover. This patent document does not disclose the configuration of the blade protrusion mechanism of the medical treatment instrument described herein.

[0006] Based on the above, the prior patent documents do not disclose or suggest a microwave-irradiated medical treatment instrument having a blade protrusion mechanism as described in this disclosure. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] WO2023 / 013239 [Patent Document 2] Retable 2013 / 172361 [Patent Document 3] WO2022 / 185488 [Overview of the project] [Problems that the invention aims to solve]

[0008] Conventional surgery involves multiple steps requiring several instruments: crushing the affected area (e.g., tumor or liver parenchyma), then irradiating the crushed area with microwaves, and finally cutting away the coagulated tissue with scissors or a scalpel. Furthermore, cutting the tissue before coagulation can cause blood vessel damage and other issues, leading to bleeding and making the surgery difficult.

[0009] The inventors of this invention conducted extensive research to solve the above problems and confirmed that the medical treatment device described herein solves the above problems by having a mechanism (blade protrusion mechanism) in which the blade does not substantially come into contact with the affected area during microwave irradiation and the blade protrudes from the cutting board after irradiation. As a result, the medical treatment device described herein was completed.

[0010] In other words, the medical device of this disclosure consists of the following: The reference numerals in parentheses indicate the embodiments described later, but the medical devices of this disclosure are not limited thereto. 1. Medical devices including the following (1), A first tip (10), wherein the first tip includes the following: Microwave-compatible antenna (11), An insulating part or dielectric part (12), the insulating part or dielectric part covers a part of the microwave-compatible antenna (11), The outer conductor portion (13), the outer conductor portion covers a part of the insulator portion or the dielectric portion, A second tip (20), wherein the second tip is positioned opposite the first tip and includes the following: second support (21), Blade (22), the blade is installed on the support, An elastic body (23), the elastic body is installed so as to surround the outside of the blade, A cutting board (24), the cutting board is installed on the surface facing the first tip of the elastic body, and A coaxial cable or semi-rigid cable (30) including a central conductor (31) and an outer conductor (32), wherein the tip of the central conductor and the outer conductor are directly or indirectly connected to the end of the microwave application antenna (11) and the outer conductor portion (13), respectively. and, The elastic body is configured to contract and the blade protrudes approximately in the direction of the first tip when the first tip and the second tip are in contact and further compressed or when the gripping force is further increased. Medical instruments. 2. The cutting board (24) has a slit portion (242) for housing the blade, The elastic body portion (23) has a slit portion (232) for housing the blade, and The blade (22) is housed in the slit portion (242) of the cutting board and the slit portion (232) of the elastic body. The medical treatment device described in item 1 above. 3. The cutting board (24) has a projection (241) that extends in the opposite direction to the direction of the second tip (extending downward) and a slit (242) for housing the blade. The elastic body portion (23) has a receiving portion (231) that penetrates the projection (241) of the cutting board and a slit portion (232) for housing the blade, and The blade (22) is housed in the slit portion (242) of the cutting board and the slit portion (232) of the elastic body. The medical treatment device described in item 1 above. 4. The second support (21) has at least two or more holes for passing through the fastener, The blade (22) has a hole (221) for passing through the fastener, The projection (241) of the cutting board has a hole (2411) for passing through the fastener. Here, Fixing device A passes through one hole in the support and the hole in the blade, and fixing device B passes through the other hole in the support and the hole in the cutting board. The medical treatment instrument according to item 3 above. 5. The microwave applicator antenna has a recess (112) for housing the protruding blade. The medical treatment instrument according to item 1 or 2 above. 6. The first tip portion and the second tip portion each have a depression (14, 25) on the proximal end side of the medical treatment instrument so as not to sandwich tissue. The medical treatment instrument according to item 1 or 2 above. 7. The microwave applicator antenna (11) has an externally exposed portion (111) that is exposed outside the tip of the first tip portion, and the externally exposed portion extends toward the proximal end side of the medical treatment instrument. The medical treatment instrument according to item 1 above. 8. The externally exposed portion extends toward the proximal end side of the medical treatment instrument substantially parallel to the external conductor portion (13). The medical treatment instrument according to item 7 above. 9. The insulator portion or the dielectric portion has an externally exposed surface (121) that is externally exposed on the surface side in contact with the second tip portion. The medical treatment instrument according to item 7 above. 10. The external conductor portion includes a first support and an external conductor cover. The insulator portion or the dielectric portion includes two insulators or dielectrics. Here, the two insulator portions or dielectrics are installed so as to sandwich the tip of the coaxial cable or semi-rigid cable, and the first support and the external conductor cover are each installed so as to sandwich the two insulators or dielectrics, and The insulator portion or the dielectric portion has an externally exposed surface (121) that is externally exposed on the surface side in contact with the second tip portion. The medical treatment instrument according to item 7 above. 11. The externally exposed surface (121) and the surface of the cutting board are uneven. The medical treatment instrument according to item 9 or item 10 above.

Advantages of the Invention

[0011] In addition to a blade projection mechanism that allows multiple operations such as grasping, crushing, microwave irradiation, and cutting of the affected area to be performed with the same instrument, the medical treatment instrument of this disclosure has one or more of the following effects: 1) The presence of an externally exposed part of the microwave-enabled antenna suppresses the attenuation of microwaves (heat generation) at the tip of the antenna. 2) When the blade is not extended, it allows for easy grasping of tissues, gauze, etc. [Brief explanation of the drawing]

[0012] [Figure 1] Overall diagram of medical treatment instruments 1 [Figure 2] Overall diagram of medical treatment instruments 2 [Figure 3] Exploded view 1 of the first tip section (upper tip section) [Figure 4] Exploded view 2 of the first tip section (upper tip section) [Figure 5] Exploded view of the first tip section (viewed from above) [Figure 6] Side view (left side view) of the first tip and the second tip (tip) [Figure 7] A: View from the tip side of the first tip, B: View from above, C: View from the side (left side view), D: View from below [Figure 8] Cross-sectional view of the first tip section 1 [Figure 9] Cross-sectional view of the first tip section 2 [Figure 10] Exploded view of the second tip section [Figure 11] A: View from the tip side of the second tip, B: View from above, C: View from the side, D: View from below. [Figure 12] Cross-sectional view of the second tip section 1 [Figure 13] Cross-sectional view of the second tip section 2 [Figure 14] Drawings of the first tip and the second tip (tip) [Figure 15] Diagram 1 illustrating the blade protrusion mechanism [Figure 16] Diagram 2 illustrating the blade protrusion mechanism [Figure 17]A: Evaluation using a prototype, B: Magnified view of the cut area.

[0013] The medical devices described herein will be explained below with reference to the drawings, but the medical devices described herein are not limited to the medical devices shown in the drawings. Figure 1 or Figure 6, when viewed from the front, will be described as a left side view of the medical treatment instrument (1) of this disclosure. When viewing Figure 6 from the front, the lower side is the lower side of the second tip (20), and the upper side is the upper side of the first tip (10). In addition, the first tip (10) and second tip (20) sides in Figure 2 are considered the tip side of the medical treatment instrument (1), and the microwave transmission coaxial cable (30) side is considered the base end side of the medical treatment instrument (1). The direction extending from the base end to the tip side (Figure 1: arrow 1 (60)) is considered the extension direction of the medical treatment instrument (1). The shapes of the "hole" and "projection" in the medical device disclosed herein are not particularly limited, as long as the projection can be fitted into the hole. For example, the projection may be a protruding shape, a convex shape, etc., and the hole may be a hole shape, a recess, a slit shape, etc. The term "engagement" in the medical device described herein includes fitting and is not particularly limited to cases where each engaging part is in direct or indirect contact, such as a joint. In the medical devices described herein, “fixing device” means a component used to fix A and B together, including, for example, pins and screws. In the medical instruments described herein, "concave" means a state in which the surface is recessed inward, and the shape of the recess is not particularly limited, but includes grooves, etc. In the medical instruments disclosed herein, "convex" means a state in which the surface bulges outward, and the shape of the bulge is not particularly limited, but includes protruding shapes, etc.

[0014] The basic configuration of the medical treatment device (1) of this disclosure is not particularly limited as long as microwaves can be irradiated from the microwave-compatible antenna (11), but it has the following configuration (see Figures 1 to 14). ○ First tip section (10): The first tip section (10) includes a microwave-compatible antenna (11), an insulator or dielectric section (12), and an outer conductor section (13). The insulating or dielectric part (12) covers a portion of the microwave-enabled antenna (11). The outer conductor part (13) covers a portion of the insulating or dielectric part (12) (see Figures 1-4). ○ Second tip (20): The second tip (20) is positioned opposite the first tip (10) (see Figures 1, 2 and 6). Opposing means that the first tip (10) and the second tip (20) are positioned facing each other, and are not particularly limited as long as grasping, crushing, microwave irradiation, or cutting of the affected area can be performed. The second tip (20) includes a second support (21), a blade (22), an elastic body (23), and a cutting board (24). The blade (22) is mounted on the second support (21). As a result, the microwaves received by the blade (22) flow to the second support (21). The material of the second support (21) is not particularly limited as long as it is a material that can receive microwaves. The material of the blade is preferably stainless steel. The elastic body (23) is positioned to surround the outside of the blade (22). The material of the elastic body is not particularly limited, but known materials such as rubber are preferred. The cutting board (24) is installed on the surface facing the first tip (10) of the elastic body (23) (see: the extension direction of arrow 2 (61) in Figure 13). The material of the cutting board (24) is preferably a heat-resistant material, and high-performance plastics such as PEKK material can be given as examples. ○ Coaxial cable or semi-rigid cable (30) including a central conductor (31) and an outer conductor (32): The end of the central conductor (31) and the outer conductor (32) are directly or indirectly connected to the end of the microwave application antenna (11) and the outer conductor section (13), respectively. The outer conductor section (13) acts as a receiver of microwaves.

[0015] The medical instrument (1) of this disclosure may also have, as necessary, a handle 1 (51), a handle 2 (52), a ring 1 (53), and a ring 2 (54) (see Figure 1). The medical instrument (1) of this disclosure is not particularly limited as long as it is movable so as to be able to grasp tissue (the target of microwave irradiation) in the gap between the first tip (10) and the second tip (20), but examples include forceps and tongs. Examples of forceps used in this disclosure include, but are not limited to, any forceps that are already known, such as Kelly forceps, Kocher forceps, Pean forceps, and Alice forceps.

[0016] (Microwave irradiation) The microwaves transmitted through the coaxial cable for microwave transmission of the medical device (1) of this disclosure are, but are not particularly limited, 300 MHz to 300 GHz (wavelength: 1 m to 1 mm), preferably 0.9 GHz to 30 GHz. The transmission method can be easily achieved by a known method, for example, by connecting to a microwave oscillator that emits microwaves known to exist, or by incorporating the oscillator into the medical device (1). The power used in this disclosure is 0.1 W to 200 W, preferably 1.0 W to 80 W.

[0017] (Coaxial cable) The coaxial cable used in the medical device of this disclosure comprises, for example, a central conductor made of copper, a shield tube made of an insulator or dielectric (for example, made of Teflon®, polyethylene, etc.) covering the central conductor, and an outer conductor (conductor) made of copper, stainless steel, brass, etc., consisting of an earth pipe or braided copper wire. Note that the coaxial cable can be a semi-rigid coaxial cable, which is a well-known type of coaxial cable.

[0018] (blade protrusion mechanism) The blade protrusion mechanism of the medical treatment instrument (1) of this disclosure will be explained with reference to Figures 13, 15, and 16, but is not limited to the example diagrams in Figures 13 and 15. When the first tip (10) and the second tip (20) are not in contact (Figures 13 and 15A: when ring 1 and ring 2 are separated), the tip of the blade (22) does not extend beyond the surface of the cutting board (24) facing the first tip (10) (the horizontal line (62) of the facing surface) (the blade is inside the cutting board). In the state where the first tip (10) and the second tip (20) are in contact via the microwave irradiation target (40) (Figure 15B: Ring 1 and Ring 2 are approaching each other), the tip of the blade (22) does not extend beyond the surface of the cutting board (24) facing the first tip (10) (the horizontal line (62) of the facing surface). In this state, the microwave irradiation target (40) between the cutting board (24) and the microwave-enabled antenna (11) and / or the outer conductor part (13) can be gripped and / or crushed. Next, microwaves are applied to the microwave-irradiated object (40) (the microwave-irradiated object after crushing), causing the object to solidify. Note that contact means not only that A and B are in direct contact, but also that A and B are in contact via C. From the state shown in Figure 15B, the operator increases the gripping force (by bringing ring 1 and ring 2 closer together), causing the externally exposed surface (121) and / or the external conductor (13) to push the cutting board (24) in a direction approximately opposite to the direction of the first tip. This pushing force causes the first tip (10) and the second tip (20) to press together, and the elastic body (23) to contract in a direction approximately opposite to the direction of the first tip (see arrow 2 (61)), causing the tip of the blade (22) to extend beyond the surface of the cutting board (24) facing the first tip (10) (the horizontal line (62) of the facing surface) (protruding from the cutting board, Figure 15C). Furthermore, the protruding blade alone or the protruding blade and the microwave application antenna (11) are used to cut and separate the solidified object. The blade projection mechanism of the medical instrument (1) of this disclosure allows the operator to smoothly grasp, crush, microwave irradiate, and / or cut the microwave irradiate target (40). More specifically, the medical instrument (1) of this disclosure can achieve grasping, crushing, microwave irradiating, and cutting of the microwave irradiate target (40) with a single instrument. The microwave-enabled antenna (11) may have a recess (112) for housing a protruding blade (22) (see Figures 15 and 16). The recess (112) holds down the microwave irradiation target (40) when the blade (22) is protruding, assisting in the cutting process. Furthermore, the recess (112) may be groove-shaped (see Figure 15). The groove shape allows the tip of the blade (22) to enter the groove, creating a shearing force that facilitates the cutting of the microwave irradiation target (40).

[0019] (Example of configuration of the second tip and blade projection mechanism) Examples of the configuration of the second tip (20) and blade protrusion mechanism of the medical treatment instrument (1) of this disclosure will be explained with reference to Figures 10-13, but are not limited to those shown in Figures 10-13. The cutting board (24) has a projection (241) that extends downward from the second tip (extending roughly in the opposite direction to the first tip) and a slit (242) for housing the blade (22). Preferably, there are two projections (241) near both ends of the cutting board (24). Preferably, the slit (242) is formed near the center of the cutting board (24). The elastic body portion (23) has a receiving portion (231) that penetrates the projection (241) of the cutting board (24) and a slit portion (232) for housing the blade (22). Preferably, there are two receiving portions (231) near both ends of the elastic body portion (23), corresponding to the projection (241) of the cutting board (24). Preferably, the slit portion (232) is formed near the center of the elastic body portion (23), corresponding to the slit portion (242) of the cutting board (24). Furthermore, the elastic body portion (23) may include two elastic bodies of the same shape. The blade (22) is housed in the slit portion (242) of the cutting board and the slit portion (232) of the elastic body (see Figures 11 and 12). Furthermore, it is preferable that the tip of the blade (22) is exposed, as shown in Figure 11A. This gives the blade (22) the effect of being able to cut tissue and other materials more easily. In the stored state, it is preferable that the tip of the blade (22) does not extend beyond the horizontal line (62) of the cutting board (24) facing the first tip (10) (the blade is inside the cutting board: see Figure 13).

[0020] The second support (21) has at least two or more holes (211) for passing through the fastener (213) as needed, and preferably has four holes (211). The blade (22) has a hole (221) for passing through the fastener (213), preferably having two holes (221). The projection (241) of the cutting board has a hole (2411) for passing through the fastener (213). Preferably, the projection (241) has two holes (2411). An example of the assembly method is shown in Figure 10. An elastic body (23) composed of two elastic parts is placed on the second support (21). Since the two elastic parts are the same shape, a receiving part (231) and a slit part (232) are formed on the elastic body. Next, the cutting board (24) is placed on the elastic body (23) by passing the projection (241) of the cutting board (242) through the receiving part (231) of the elastic body. The blade (22) is placed in the slit part (242) of the cutting board and the slit part (232) of the elastic body. Furthermore, the elastic body (23), cutting board (24), and blade (22) are secured with fasteners to prevent them from coming loose. More specifically, the same fastener passes through one hole (211) of the second support (21) and one hole (2411) of the cutting board (24), the same fastener passes through one hole (211) of the second support (21) and one hole (221) of the blade (22), the same fastener passes through one hole (211) of the second support (21) and the other other hole (221) of the blade (22), and the same fastener passes through one hole (211) of the second support (21) and the other hole (2411) of the cutting board (24). Furthermore, as explained above, it is preferable that the holes (2411) in the protrusions of the cutting board have a shape that allows for movement between the cutting board (24) and the elastic body (23) (a shape with some play).

[0021] (Indentation at the tip) As illustrated in Figure 6, the medical instrument (1) of the present disclosure has a first tip (10) and a second tip (20) having recesses (14) and (25), respectively. These indentations (14, 25) prevent tissue and organ damage caused by pinching of tissues that are not the target of irradiation.

[0022] (Externally exposed part) The first tip (10) of the medical instrument (1) of this disclosure preferably includes an externally exposed portion (111), as illustrated in Figure 7. The externally exposed portion (111), as shown in Figure 7A, is exposed to the outside from the tip of the first tip, and further, as shown in Figure 7D, it extends downward from the first tip toward the base end of the medical instrument, and more specifically, it extends toward the base end approximately parallel to the external conductor portion (13). The externally exposed portion (111) is more preferably partially or entirely coated with a coating that makes it difficult for solidified tissue to adhere. The coating can be made of gold, Teflon-based material (especially PTFE), etc. The externally exposed portion (111) of the microwave-enabled antenna has the effect of suppressing the attenuation of microwaves (heat generation) at the tip of the antenna.

[0023] (Example of the configuration of the first tip section) An example of the configuration of the first tip of the medical treatment device (1) of this disclosure (an example of a sandwich-type configuration) will be described with reference to Figures 3-8, but is not limited to the descriptions in these drawings. The outer conductor portion (13) includes a first support (131) and an outer conductor cover (132). The insulating or dielectric portion (12) includes two insulating or dielectric materials. The two insulating or dielectric materials are installed so as to sandwich the end of the coaxial cable or semi-rigid cable (30). The outer conductor portion (13) is more preferably partially or entirely coated with a coating that makes it difficult for solidified tissue to adhere. The coating can be made of gold, Teflon-based material (especially PTFE), etc. The first support (131) and the outer conductor cover (132) are each installed so as to sandwich two insulators or dielectrics. The insulating or dielectric portion (12) has an externally exposed surface (121) on the side that is in contact with the second tip, as illustrated in Figure 7D. The externally exposed surface (121) is preferably configured to sandwich the externally exposed portion (111) of the microwave-enabled antenna. The first tip assembly method involves fixing the first support (131) and the outer conductor cover (132) with fasteners. Furthermore, after this fixing, the first tip is welded with a laser or the like. More specifically, the same fastener passes through one hole in the first support (131) and one hole in the outer conductor cover (132), and the same fastener passes through another hole in the first support (131) and another hole in the outer conductor cover (132). The sandwich configuration described above is preferred for processing tools having a microwave-compatible antenna (11) with an externally exposed portion (111). More specifically, a processing tool having a microwave-compatible antenna with an externally exposed portion (111) can have an externally exposed surface (121) of the insulating portion or dielectric portion (12) by the sandwich configuration described above.

[0024] Preferably, the externally exposed surface (121) has an uneven shape, and the surface of the cutting board (24) also has an uneven shape. More specifically, it is preferable that the convex shape of the uneven shape of the externally exposed surface (121) is in contact with the convex shape of the uneven shape of the surface of the cutting board (24). This combination of shapes has the effect of making it less likely to slip when gripping the microwave irradiation target (40).

[0025] (Antenna for microwave application) The microwave application antenna (11) of this disclosure is not particularly limited as long as it is made of a material capable of supplying microwaves. For example, a wide range of conductive materials such as silver, copper, gold, iron, titanium, stainless steel, phosphor bronze, or brass can be used. Preferably, examples include SUS304, silver, copper, gold, stainless steel, and brass. The shape of the antenna is not particularly limited, but examples include cones, triangular pyramids, square pyramids, cylinders, rectangular prisms, triangular prisms, spheres, cubes, and rectangular prisms. Furthermore, the inner surface of the antenna (especially the contact surface with the tissue) can be broadly adapted to various shapes such as blade shapes, flat shapes, round shapes, rod shapes, uneven shapes, and sawtooth shapes.

[0026] (First tip and second tip) The first tip (10) and second tip (20) of the medical instrument of this disclosure are preferably configured to be movable so as to grasp tissue in the gap between the two tips (particularly forceps), and further preferably have coagulation and cutting functions as needed. It is preferable that both ends are partially or entirely coated with a coating that makes it difficult for solidified tissue to adhere to the tissue during contact. The coating is made of gold, Teflon-based material, etc. This allows for continuous solidification and cutting without solidified tissue adhering to the surface.

[0027] (Results of the prototype) A prototype was created based on the configuration shown in each of these figures. A simulated organ was cut using this prototype (see Figure 17). As a comparative example, two conventional types of surgical instruments were used. One method involved grasping organs (tissues and blood vessels), crushing them, and then coagulating the tissue, but it was not possible to cut them. Another issue was that while the organs coagulated during the cutting process, they could not be grasped. On the other hand, in the prototype, gripping, crushing, solidification, and cutting could all be achieved in a single action (especially a one-directional action). [Industrial applicability]

[0028] This disclosure provides a medical treatment device that can perform multiple operations, such as grasping, crushing, microwave irradiation, and cutting of the affected area, with the same instrument. [Explanation of Symbols]

[0029] 1: Medical instruments 10:First tip 11: Microwave-compatible antenna 111: Externally exposed part of microwave-enabled antenna 112: Recess 12: Insulator or dielectric part 121: External exposed surface of the insulating or dielectric part 13: Outer conductor section 131: First support 132: Outer conductor cover 14: Indentation 15: Fixtures 20:Second tip 21:Second support 211: Hole in the second support 213: Fixtures 22: Blade 221: Hole in the blade 23: Elastic body 231: Receptacle portion of elastic body 232: Slit portion of elastic material 24: Cutting board 241: Cutting board protrusions 2411: Hole in the protruding part of the cutting board 242: Slit section of cutting board 25: Indentation 30: Coaxial cable or semi-rigid cable 31: Central conductor 32: Outer conductor 33: Insulator 40: Target for microwave irradiation 51: Handle 1 52: Handle 2 53: Ring 1 54: Ring 2 60: Arrow 1 61: Arrow 2 62:Horizontal line

Claims

1. Medical instruments including the following: The first tip portion, where the first tip portion includes the following: Microwave application antenna, An insulating portion or a dielectric portion, the insulating portion or the dielectric portion covers a part of the microwave application antenna, The outer conductor portion, the outer conductor portion covers a part of the insulator portion or the dielectric portion, A second tip, wherein the second tip is positioned opposite the first tip and includes the following: a second support; A blade, the blade is mounted on the support, An elastic body portion, the elastic body portion is installed on the second support so as to surround the outside of the blade, A cutting board, the cutting board is placed on the surface of the elastic body portion facing the first tip, and A coaxial cable or semi-rigid cable including a central conductor and an outer conductor, wherein the tip of the central conductor and the outer conductor are directly or indirectly connected to the end of the microwave application antenna and the outer conductor portion, respectively. Here, the cutting board has a slit for housing the blade, the elastic body has a slit for housing the blade, and the blade is housed in the slit of the cutting board and the slit of the elastic body. and, The elastic body is configured such that, when the first tip and the second tip are in contact, further compression or increased gripping force causes the elastic body to contract in a direction substantially opposite to the direction of the first tip, and the blade protrudes substantially in the direction of the first tip. Medical instruments.

2. The cutting board has a projection extending from the second tip in the direction substantially opposite to that of the first tip, and a slit for housing the blade. The elastic body portion has a receiving portion that penetrates the projection of the cutting board and a slit portion for housing the blade, and The blade is housed in the slit portion of the cutting board and the slit portion of the elastic body. A medical treatment device according to claim 1.

3. The second support has at least two or more holes for passing through the fastener, The blade has a hole for passing through the fastener, The projection of the cutting board has a hole for passing through the fastener. Here, Fixing device A passes through one hole in the support and the hole in the blade, and fixing device B passes through the other hole in the support and the hole in the cutting board. The medical treatment device according to claim 2.

4. The microwave application antenna has a recess for housing the protruding blade, A medical treatment device according to claim 1.

5. The first tip and the second tip each have a recess on the base end side of the medical instrument to prevent pinching tissue. A medical treatment device according to claim 1.

6. The microwave application antenna has an externally exposed portion that is exposed to the outside from the tip of the first tip, and this externally exposed portion extends toward the base end of the medical treatment instrument. A medical treatment device according to claim 1.

7. The externally exposed portion extends toward the base end of the medical instrument, substantially parallel to the external conductive portion. The medical treatment device according to claim 6.

8. The insulating portion or the dielectric portion has an externally exposed surface on the side that is in contact with the second tip portion, The medical treatment device according to claim 6.

9. The external conductor portion includes a first support and an external conductor cover. The insulating portion or the dielectric portion includes two insulators or dielectrics, Here, the two insulators or dielectrics are installed so as to sandwich the end of the coaxial cable or semi-rigid cable, and the first support and the outer conductor cover are installed so as to sandwich the two insulators or dielectrics, and, The insulating portion or the dielectric portion has an externally exposed surface on the side that is in contact with the second tip portion. The medical treatment device according to claim 6.

10. The externally exposed surface and the surface of the cutting board have an uneven shape. A medical treatment device according to claim 8 or claim 9.

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