power supply

Abstract

The present application provides a power supply device, which is provided with a through hole of a puncture sleeve through which a rod of an instrument passes, and which can supply power to a power receiving portion at low cost and can perform fine operation of the rod. The power supply device of the present application is provided with a puncture sleeve 2; terminals 3A, 3B provided on the inner surface of a through hole 13 of the puncture sleeve 2; wires 4A, 4B connecting the terminals 3A, 3B with a power source; a rod 5 capable of passing through the through hole 13 of the puncture sleeve 2; a power receiving portion 8 provided on the rod 5; terminals 6A, 6B provided on the outer surface of the rod 5; and wires 7A, 7B connecting the power receiving portion 8 with the terminals 6A, 6B. By passing the rod 5 through the through hole 13, the terminals 3A, 3B are brought into contact with the terminals 6A, 6B, and power from the power source can be supplied to the power receiving portion 8.

Description

Technical Field

[0001] The present invention relates to a power supply device that supplies power to an electrical receiving part provided on the instrument shaft by passing through a through hole in a port site of a surgical instrument shaft equipped with a microwave forceps or similar surgical instrument. Background Technology

[0002] In recent years, there has been a trend of a large number of surgeries shifting towards robot-assisted surgery and endoscopic surgery. These surgeries utilize surgical devices equipped with instruments for performing procedures inside the patient's body. Such devices include: a port site with a perforation in the patient's body wall; and an instrument that is inserted into the body through the port of the port site. Microwaves are emitted from the instrument to cauterize bleeding sites.

[0003] In the aforementioned instruments, thick and rigid coaxial cables are connected to the instrument rods to directly supply microwaves. Therefore, when multiple instruments are used in surgery, the numerous coaxial cables crisscrossing in the space of the operating table become extremely cumbersome. Furthermore, connecting multiple coaxial cables to avoid this problem restricts the movement of the instrument rods, making delicate manipulation of the rods difficult.

[0004] In particular, when using 2.45 GHz microwaves, which are useful for surgery, approximately 50 W of microwaves are required to irradiate the surgical area. Therefore, it is common practice to run a coaxial cable of at least 2 meters from an external microwave power source to supply 50 W of power to the instrument. Moreover, in this case, due to the significant microwave transmission loss, a coaxial cable with a diameter of approximately 10 mm is used for the aforementioned wiring. While microwave coaxial cables are somewhat flexible, they are also quite rigid, making it difficult to operate the instrument while dragging the coaxial cable, and also raising concerns about patient safety.

[0005] In addition, in recent years, high-frequency devices with built-in batteries have been proposed as devices that do not require the aforementioned coaxial cables, but it has been pointed out that the battery life, weight, and size are not sufficient to meet the required level of battery.

[0006] Furthermore, in recent years, surgical devices have been proposed that connect to the trocar instead of the coaxial cable to the instrument rod. For example, in the surgical device disclosed in Patent Document 1, high-frequency power is supplied from a power source to the trocar via a coaxial cable, and the power supplied to the trocar wirelessly powers the instrument rod. However, in the device of Patent Document 1, to achieve the aforementioned wireless power supply, it is necessary not only to install a power supply coil in the trocar and a power receiving coil in the instrument rod, but also to have a complex mechanism for sliding the instrument rod to maintain the relative state of the power supply coil and the power receiving coil. Therefore, it is considered that the manufacturing cost of the surgical device of Patent Document 1 is high, and its disposable production is difficult.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2015-123117 Summary of the Invention

[0010] The problem the invention aims to solve

[0011] The present invention was made in view of the above-mentioned matters. The object of the present invention is to provide a power supply device for an instrument rod having a receiving part that passes through the through hole of a puncture cannula, which can supply current to the receiving part at low cost and can perform fine manipulation of the instrument rod.

[0012] means for solving problems

[0013] To achieve the above objectives, the present invention includes the subject matter described in the following items.

[0014] Item 1. A power supply device comprising:

[0015] The puncture cannula is made of insulating material and has a through hole;

[0016] The puncture cannula side terminal is disposed on the inner surface of the through hole of the puncture cannula;

[0017] A power supply line on the puncture cannula side connects the terminal on the puncture cannula side to the power supply;

[0018] The instrument rod is capable of passing through the through hole;

[0019] A power receiving part is provided on the instrument rod;

[0020] Rod-side terminals are disposed on the outer surface of the instrument rod; and

[0021] A power supply line is provided on the instrument rod, connecting the power receiving part to the rod-side terminal.

[0022] By passing the instrument rod through the through hole of the puncture cannula, the terminal on the side of the puncture cannula can be brought into contact with the terminal on the side of the rod.

[0023] With the puncture cannula-side terminal in contact with the rod-side terminal, power from the power source can be supplied to the receiving part through the puncture cannula-side power supply line, the puncture cannula-side terminal, the rod-side terminal, and the rod-side power supply line.

[0024] Item 2. The power supply device as described in Item 1, the power supply device further comprising an air supply tube connected to the puncture cannula,

[0025] Gas flowing inside the gas delivery tube is introduced into the through hole and discharged from the opening at the other end of the puncture cannula.

[0026] Item 3. The power supply device as described in Item 1 or 2, said power supply device having a cylindrical cover formed of a retractable insulating material,

[0027] The cylindrical cap is positioned such that the instrument rod passes through the inside of the cylindrical cap, and one end of the cylindrical cap is fixed to the outer surface of the instrument rod at a midpoint.

[0028] The rod-side terminal is positioned closer to the front end of the instrument rod than the midpoint position.

[0029] With the puncture cannula side terminal in contact with the rod side terminal, the other end of the cylindrical cap is in contact with one end of the puncture cannula, and the entire rod side terminal in contact with the puncture cannula side terminal is accommodated within the space formed by the inner side of the cylindrical cap and the through hole of the puncture cannula.

[0030] Item 4. The power supply of any one of items 1 to 3, wherein, in the state where the puncture sleeve side terminal is in contact with the rod side terminal, the entire rod side terminal in contact with the puncture sleeve side terminal is located inside the through hole.

[0031] Item 5. The power supply of any one of items 1 to 4, provided with a pair of puncture cannula-side terminals arranged opposite each other in the radial direction of the puncture cannula, as the puncture cannula-side terminals.

[0032] A first puncture cannula-side power supply line is provided for connecting one of the puncture cannula-side terminals to a power source, and a second puncture cannula-side power supply line is provided for connecting the other puncture cannula-side terminal to a power source, serving as the puncture cannula-side power supply line.

[0033] A pair of rod-side terminals are provided, arranged opposite each other in the radial direction of the instrument rod, as the rod-side terminals.

[0034] The rod-side power supply line is provided for connecting one of the rod-side terminals to the power receiving part and for connecting the other rod-side terminal to the power receiving part.

[0035] By inserting the pair of rod-side terminals into the through hole of the puncture cannula, making one of the pair of rod-side terminals contact one of the pair of puncture cannula-side terminals, and making the other of the pair of rod-side terminals contact the other of the pair of puncture cannula-side terminals, power from the power source can be supplied to the receiving part via the first puncture cannula-side power supply line and the second puncture cannula-side power supply line, the pair of puncture cannula-side terminals, the pair of rod-side terminals, and the first rod-side power supply line and the second rod-side power supply line.

[0036] Item 6. The power supply as described in Item 5, wherein, in the circumferential direction of the puncture cannula, gaps are respectively provided between one end of the pair of puncture cannula side terminals and between the other ends of the pair of puncture cannula side terminals.

[0037] The width of each of the pair of rod-side terminals is shorter than the width of the gap.

[0038] Item 7. The power supply as described in Item 5 or 6, wherein a plurality of sets of the pair of rod-side terminals are spaced apart along the axial direction of the instrument rod.

[0039] The pole-side power supply line is provided for connecting one of the pairs of pole-side terminals in each group to a power source, and for connecting the other of the pairs of pole-side terminals in each group to a power source.

[0040] By inserting a set of the pair of rod-side terminals into the through hole of the puncture cannula, making one of the set of rod-side terminals contact one of the pair of puncture cannula-side terminals and making the other of the set of rod-side terminals contact the other of the pair of puncture cannula-side terminals, power from the power source can be supplied to the receiving part via the first puncture cannula-side power supply line and the second puncture cannula-side power supply line, the pair of puncture cannula-side terminals, the set of the pair of rod-side terminals, and the first rod-side power supply line and the second rod-side power supply line.

[0041] Item 8. The power supply as described in Item 7, wherein, with one of the set of rod-side terminals in contact with one of the pair of puncture sleeve-side terminals and the other of the set of rod-side terminals in contact with the other of the pair of puncture sleeve-side terminals, the entire set of rod-side terminals is accommodated inside the through hole of the puncture sleeve.

[0042] Item 9. The power supply as described in Item 7 or 8, wherein the spacing between two adjacent sets of the pair of rod-side terminals along the axial direction of the instrument rod is equal to the length of the pair of puncture cannula-side terminals.

[0043] Item 10. The power supply as described in any one of items 7 to 9, wherein each pair of rod-side terminals is arranged in a recess formed on the outer surface of the instrument rod in a spring-supported state.

[0044] The first pole-side power supply line passes through a recess configured with one of the pairs of pole-side terminals in each set, and the second pole-side power supply line passes through a recess configured with the other of the pairs of pole-side terminals in each set.

[0045] With one of the pair of rod-side terminals pressed down and in contact with the first rod-side power supply line passing through the recess, and the other rod-side terminal pressed down and in contact with the second rod-side power supply line passing through the recess, by inserting the set of rod-side terminals into the through hole of the puncture cannula, one of the rod-side terminals in the set comes into contact with one of the puncture cannula-side terminals of the pair of puncture cannula-side terminals, and the other rod-side terminal in the set comes into contact with the other of the pair of puncture cannula-side terminals, thereby supplying power from the power source to the receiving part via the first puncture cannula-side power supply line and the second puncture cannula-side power supply line, the pair of puncture cannula-side terminals, the set of the pair of rod-side terminals, and the first rod-side power supply line and the second rod-side power supply line.

[0046] Item 11. The power supply device as described in Item 10, wherein the first rod-side power supply line is composed of a plurality of first wires continuously arranged in the axial direction of the instrument rod, and the second rod-side power supply line is composed of a plurality of second wires continuously arranged in the axial direction of the instrument rod.

[0047] For the first wire closest to the power receiving part among the plurality of first wires, one end of its power receiving part proximal to the power receiving part is connected to the power receiving part, and the other end of its power receiving part distal to the power receiving part extends into the recess closest to the power receiving part, which is one of the sets of pairs of rod-side terminals; for the remaining first wires, one end of its power receiving part proximal to the power receiving part and the other end of its power receiving part distal to the power receiving part extend into the recess that is one of the sets of pairs of rod-side terminals and is axially adjacent to the instrument rod.

[0048] The plurality of first wires are positioned in the recess with their respective other ends spring-supported. By pushing the rod-side terminal into the recess, the rod-side terminal can be brought into contact with the other end of the first wire positioned in the recess.

[0049] The recesses extending from one end of the first wire on the distal side of the power receiving portion and the other end of the first wire on the proximal side of the power receiving portion, when the rod-side terminal is not pushed into the recesses, cause the other end of the first wire on the proximal side of the power receiving portion to be lifted by the spring force, thereby coming into contact with one end of the first wire on the distal side of the power receiving portion. When the rod-side terminal is pushed into the recesses, the rod-side terminal pushes the other end of the first wire on the proximal side of the power receiving portion, thereby causing the other end of the first wire on the proximal side of the power receiving portion to move away from one end of the first wire on the distal side of the power receiving portion.

[0050] For the second wire closest to the power receiving part among the plurality of second wires, one end of its power receiving part proximal to the power receiving part is connected to the power receiving part, and the other end of its power receiving part distal to the power receiving part extends into the recess closest to the power receiving part in the other of the pairs of rod-side terminals; for the remaining second wires, one end of its power receiving part proximal to the power receiving part and the other end of its power receiving part distal to the power receiving part extend into the recess adjacent in the axial direction of the other of the pairs of rod-side terminals.

[0051] The plurality of second wires are positioned in the recess with their respective other ends spring-supported. Pushing the rod-side terminal into the recess allows the rod-side terminal to contact the other end of the second wire positioned in the recess.

[0052] For the recesses extending from one end of the second wire on the distal side of the power receiving part and the other end of the first wire on the proximal side of the power receiving part, when the rod-side terminal is not pushed into the recess, the other end of the second wire on the proximal side of the power receiving part is lifted by the spring force and comes into contact with one end of the second wire on the distal side of the power receiving part. When the rod-side terminal is pushed into the recess, the rod-side terminal pushes the other end of the second wire on the proximal side of the power receiving part, thereby causing the other end of the second wire on the proximal side of the power receiving part to move away from one end of the second wire on the distal side of the power receiving part.

[0053] Item 12. The power supply as described in any one of items 1 to 11, wherein the power source is a DC power source or an AC power source.

[0054] The power receiving unit outputs microwaves by being supplied with DC or AC power from the power source.

[0055] Item 13. The power supply as described in any one of items 1 to 11, wherein the power source is a DC power source or an AC power source.

[0056] The power receiving unit outputs high-frequency waves by being supplied with DC or AC power from the power source.

[0057] Item 14. A power supply device comprising:

[0058] The puncture cannula is made of insulating material and has a through hole;

[0059] The puncture cannula side terminal is disposed on the inner surface of the through hole of the puncture cannula;

[0060] A power supply line on the puncture cannula side connects the terminal on the puncture cannula side to the power supply;

[0061] The instrument rod is capable of passing through the through hole;

[0062] A power receiving part is provided on the instrument rod;

[0063] A rod-side terminal is disposed on the outer surface of the instrument rod; and

[0064] A power supply line is provided on the instrument rod, connecting the power receiving part to the rod-side terminal.

[0065] The power receiving unit includes at least a microwave oscillator and a microwave amplifier.

[0066] By passing the instrument rod through the through hole of the puncture cannula, the terminal on the side of the puncture cannula can be brought into contact with the terminal on the side of the rod.

[0067] With the puncture cannula-side terminal in contact with the rod-side terminal, power from the power source is supplied to the power receiving part via the puncture cannula-side power supply line, the puncture cannula-side terminal, the rod-side terminal, and the rod-side power supply line.

[0068] The power source is a DC power source.

[0069] The microwave oscillator uses the DC power supplied from the power source to the power receiving unit as a DC power source to generate microwaves, and the microwave amplifier uses the DC power supplied from the power source to the power receiving unit as a DC power source to amplify the microwaves.

[0070] Item 15. A power supply device comprising:

[0071] The puncture cannula is made of insulating material and has a through hole;

[0072] The puncture cannula side terminal is disposed on the inner surface of the through hole of the puncture cannula;

[0073] A power supply line on the puncture cannula side connects the terminal on the puncture cannula side to the power supply;

[0074] The instrument rod is capable of passing through the through hole;

[0075] A power receiving part is provided on the instrument rod;

[0076] Rod-side terminals are disposed on the outer surface of the instrument rod; and

[0077] A power supply line is provided on the instrument rod, connecting the power receiving part to the rod-side terminal.

[0078] The power receiving unit includes at least a converter, a microwave oscillator, and a microwave amplifier.

[0079] By passing the instrument rod through the through hole of the puncture cannula, the terminal on the side of the puncture cannula can be brought into contact with the terminal on the side of the rod.

[0080] With the puncture cannula-side terminal in contact with the rod-side terminal, power from the power source is supplied to the power receiving part via the puncture cannula-side power supply line, the puncture cannula-side terminal, the rod-side terminal, and the rod-side power supply line.

[0081] The power source is an AC power source.

[0082] The converter converts the AC power supplied from the power source to the power receiving unit into DC power. The microwave oscillator uses the DC power converted by the converter as a DC power source to generate microwaves. The microwave amplifier uses the DC power converted by the converter as a DC power source to amplify the microwaves.

[0083] Item 16. The power supply as described in Item 14 or 15, wherein the frequency of the microwave is 2.45 GHz ± 50 MHz, the power conversion efficiency of the microwave amplifier is 50% or more, and the power supplied from the power supply to the power receiving unit is 10 W or more and 150 W or less.

[0084] Invention Effects

[0085] According to the power supply device of the present invention, since the power supply line on the puncture cannula side is connected to the puncture cannula side terminal provided on the puncture cannula, the movement of the instrument lever is not restricted. Therefore, fine manipulation of the instrument lever is possible, and the safety of the patient can be improved when the power supply device is used in surgery.

[0086] Furthermore, according to the power supply device of the present invention, power can be supplied to the power receiving part via a simple mechanism that connects the power supply circuit (power supply line on the puncture sleeve side and the puncture sleeve side terminal) on the power supply side and the power supply circuit (power supply line on the power receiving part and the power supply line on the power receiving part side) through contact between the puncture sleeve side terminal and the pole side terminal. Therefore, the power supply device of the present invention can achieve power supply to the power receiving part at low cost.

[0087] Furthermore, according to the power supply of the present invention, instead of using a rigid coaxial cable, a power supply line is used to connect the puncture cannula side terminal to the power supply. Therefore, when the instrument rod is operated with the puncture cannula inserted, the load applied to the instrument rod from the puncture cannula can be reduced to a smaller load. Thus, the instrument rod can be easily operated with the puncture cannula inserted (for example, with the puncture cannula inserted, the instrument rod can be easily tilted to change the angle of the instrument rod and the puncture cannula). Attached Figure Description

[0088] Figure 1 This is a diagram illustrating a power supply device according to an embodiment of the present invention. Figure 1 (a) is a side view of the power supply. Figure 1 (b) is a schematic diagram of the longitudinal section of the power supply.

[0089] Figure 2 It is shown that... Figure 1 (a) A cross-sectional schematic diagram of the AA line disconnected power supply.

[0090] Figure 3 This is a schematic diagram showing the operating status of the power supply.

[0091] Figure 4 (a) is Figure 1 The diagram shows a cross-sectional view of the puncture sleeve 2 of the power supply device. Figure 4 (b) is Figure 1 A schematic cross-sectional view of the instrument rod 5 of the power supply unit shown.

[0092] Figure 5 This is a longitudinal cross-sectional schematic diagram showing the process of passing the instrument rod through the through hole. Figure 5 (a) shows the state when the front end of the instrument rod is inside the through hole. Figure 5 (b) shows the state where the length of the instrument rod extending from one end of the puncture cannula is at its shortest when the cannula-side terminal is in contact with the rod-side terminal. Figure 5 (c) shows the state where the length of the instrument rod extending from one end of the puncture cannula is at its maximum when the puncture cannula side terminal is in contact with the rod side terminal.

[0093] Figure 6 This is a schematic longitudinal section of a power supply device illustrating a modified example of the present invention.

[0094] Figure 7 This is a schematic longitudinal section of a power supply device illustrating a modified example of the present invention. Figure 7 (a) shows the state in which the rod-side terminals 6Aa and 6Ba are in contact with the puncture cannula-side terminals 3A and 3B. Figure 7(b) shows the state in which the rod-side terminals 6Ab and 6Bb are in contact with the puncture cannula-side terminals 3A and 3B.

[0095] Figure 8 It is shown in magnification Figure 7 A schematic diagram of a longitudinal section of a portion of the power supply shown.

[0096] Figure 9 This is a schematic longitudinal section of a power supply device illustrating a modified example of the present invention. Figure 9 (a) shows the state in which the rod-side terminals 6Ca and 6Da are in contact with the puncture cannula-side terminals 3A and 3B. Figure 9 (b) shows the state in which the rod-side terminals 6Cb and 6Db are in contact with the puncture sleeve-side terminals 3A and 3B.

[0097] Figure 10 It is shown in Figure 9 (a) shows a schematic cross-section of the AA line in the state where the power supply is cut off.

[0098] Figure 11 It is shown in magnification Figure 9 A schematic diagram of a longitudinal section of a portion of the power supply shown.

[0099] Figure 12 (a) is Figure 9 The diagram shows a cross-sectional view of the puncture cannula of the power supply device. Figure 12 (b) is Figure 9 A schematic cross-sectional view of the instrument rod of the power supply device shown.

[0100] Figure 13 This is a longitudinal cross-sectional schematic diagram of a power supply device showing a modified example of the present invention, illustrating the state in which the rod-side terminals 6Ca and 6Da are in contact with the piercing sleeve-side terminals 3A and 3B.

[0101] Figure 14 This is a longitudinal cross-sectional schematic diagram of a power supply device showing a modified example of the present invention, showing the state in which the rod-side terminals 6Cb and 6Db are in contact with the piercing sleeve-side terminals 3A and 3B.

[0102] Figure 15 It is shown in magnification Figure 13 A partial cross-sectional view.

[0103] Figure 16 It is shown in magnification Figure 14 A partial cross-sectional view.

[0104] Figure 17 (a) is shown in Figures 1 to 8 The diagram shows a cross-sectional view of a modified example of a power supply device equipped with an insulator. Figure 17 (b) is shown in Figures 9 to 12The diagram shows a cross-sectional view of a modified example of a power supply device equipped with an insulator. Detailed Implementation

[0105] In the following description, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 (a) is a side view schematic diagram of the power supply device according to an embodiment of the present invention. Figure 1 (b) is a longitudinal cross-sectional schematic diagram of the power supply device according to an embodiment of the present invention. Figure 2 It is shown that... Figure 1 (a) A cross-sectional schematic diagram of the AA line disconnected power supply. Figure 3 This is a schematic diagram showing the operating status of the power supply. Figure 4 (a) is Figure 1 The diagram shows a cross-sectional view of the puncture sleeve 2 of the power supply device. Figure 4 (b) is Figure 1 A schematic cross-sectional view of the instrument rod 5 of the power supply unit shown.

[0106] The power supply in this embodiment is used for the subject H ( Figure 3 Surgery inside the body. For example... Figures 1 to 3 As shown, the power supply device of this embodiment includes a puncture cannula 2; a pair of puncture cannula-side terminals 3A and 3B; puncture cannula-side power supply lines 4A and 4B; an instrument rod 5; a pair of rod-side terminals 6A and 6B; rod-side power supply lines 7A and 7B; a power receiving part J; a first coaxial cable 10; a second coaxial cable 11; and a cylindrical cover 12.

[0107] The puncture cannula 2 is a cylindrical body with a through hole 13 in a circular cross-section, and is formed of an insulating material such as resin. In the illustrated example, the puncture cannula 2 is a cannula in which a slender small-diameter portion 2b extends from a large-diameter portion 2a, and the through hole 13 penetrates both the large-diameter portion 2a and the small-diameter portion 2b.

[0108] A pair of puncture cannula-side terminals 3A and 3B, formed of metal foil, are disposed on the inner surface of the through hole 13 of the puncture cannula 2. The pair of puncture cannula-side terminals 3A and 3B are positioned in the radial direction E( Figure 4 (a) The terminals 3A and 3B are arranged opposite to each other and fixed to the puncture cannula 2 using screws and adhesive. The phrase "opposite to each other in the radial direction E" means that the center of the width of terminal 3A and the center of the width of terminal 3B are located on the same straight line extending in the radial direction E. Each of the puncture cannula side terminals 3A and 3B has a length less than half the circumference of the puncture cannula 2. In the circumferential direction of the puncture cannula 2, gaps S are respectively provided between one end of the puncture cannula side terminals 3A and 3B and between the other ends of the puncture cannula side terminals 3A and 3B. Figure 2Alternatively, the piercing sleeve side terminals 3A and 3B can be formed by coating the inner surface of the through hole 13 with metal powder.

[0109] The power supply lines 4A and 4B on the puncture cannula side are DC power supply lines. Power supply line 4A connects terminal 3A on the puncture cannula side to one electrode of the DC power supply, and power supply line 4B connects terminal 3B on the puncture cannula side to the other electrode of the DC power supply. The user can apply voltage to terminals 3A and 3B on the puncture cannula side via power supply lines 4A and 4B by turning on a switch (foot switch, etc.) connected to the DC power supply, and can stop applying voltage to terminals 3A and 3B by turning off the switch. In the illustrated example, to connect power supply lines 4A and 4B on the puncture cannula side to terminals 3A and 3B on the puncture cannula side, power supply lines 4A and 4B are inserted into the through hole 13 through the opening 13a at one end of the puncture cannula 2.

[0110] The instrument rod 5 is a cylindrical body made of insulating materials such as resin, capable of passing through the through hole 13 of the puncture cannula 2. Figure 5 This is a longitudinal cross-sectional schematic diagram showing the process of inserting the instrument rod 5 through the through hole 13 of the puncture cannula 2. Figure 5 (a) shows the state when the front end of the instrument rod 5 is located inside the through hole 13. Figure 5 (b) and Figure 5 (c) shows the state in which the front end of the instrument rod 5 protrudes from the opening 13b of the through hole 13 located at the other end of the puncture cannula 2.

[0111] The instrument rod 5 has a cavity 14 extending along its long side. Figure 2 A gripping part 5a for the surgeon to hold is provided on the base end side of the instrument rod 5, protruding radially outward. Figure 1 The grip 5a has a hollow structure, and the instrument rod 5 has a cavity 14 ( Figure 2 From the gripping part 5a ( Figure 1 The internal space of the grip 5a extends to the front end of the lever 5. Within the internal space of the grip 5a is a receiving unit J that outputs microwaves using DC power supplied from a power source. The receiving unit J includes a microwave oscillator 8 and a microwave amplifier 9. The microwave oscillator 8 uses the DC power supplied from the power source to the receiving unit J as its DC power supply to generate microwaves. The microwave amplifier 9 uses the DC power supplied from the power source to the receiving unit J as its DC power supply to amplify the microwaves generated by the microwave oscillator 8.

[0112] A pair of rod-side terminals 6A and 6B, formed of metal foil, are disposed on the outer surface of the instrument rod 5. The rod-side terminals 6A and 6B are positioned in the radial direction F(...) of the instrument rod 5. Figure 4(b) The terminals 6A and 6B are arranged in a relatively opposite manner and are fixed to the instrument rod 5 using screws and adhesive. The phrase "relatively opposite in the radial direction F" means that the center of the width of terminal 6A and the center of the width of terminal 6B are located on the same straight line extending in the radial direction F. The width Ha of the terminals 6A and 6B is... Figure 4 (b) is the width of the gap S, Hb ( Figure 4 (a)) Short. Alternatively, the rod-side terminals 6A and 6B can be formed by coating metal powder onto the outer surface of the instrument rod 5.

[0113] like Figure 1 As shown in (b), pole-side power supply lines 7A and 7B, a first coaxial cable 10, and a second coaxial cable 11 are installed on the instrument pole 5.

[0114] The pole-side power supply lines 7A and 7B are DC power supply lines. Pole-side power supply line 7A connects pole-side terminal 6A to the power receiving part J, and pole-side power supply line 7B connects pole-side terminal 6B to the power receiving part J. The aforementioned pole-side power supply lines 7A and 7B pass, for example, through the hole 14 in the instrument pole 5. In this case, one end of each pole-side power supply line 7A and 7B enters the internal space of the grip part 5a and connects to the power receiving part J. Figure 1 (b)). The other ends of the pole-side power supply lines 7A and 7B are respectively arranged radially along F ( Figure 4 (b) The other ends of the rod-side power supply lines 7A and 7B, which extend through the wall of the instrument rod 5 and outward to the radial side of the instrument rod 5, are connected to the rod-side terminals 6A and 6B, respectively.

[0115] The first coaxial cable 10 is disposed in the internal space of the grip portion 5a, connecting the microwave oscillator 8 to the microwave amplifier 9.

[0116] The second coaxial cable 11 passes through the hole 14 of the instrument rod 5. Figure 2 (), extending from the microwave amplifier 9 to the front end of the instrument rod 5.

[0117] In the illustrated example, a pair of blades 20, 20 are provided at the front end (operating part) of the aforementioned instrument rod 5, and the microwave amplifier 9 is connected to the blades 20, 20 via a second coaxial cable 11. The blades 20, 20 are blades with increasingly tapered heads, as disclosed in Japanese Patent Application Laid-Open No. 2018-11994, with the ends of the central conductor and the outer conductor exposed, and an insulator located between the ends of the central conductor and the outer conductor, enabling microwaves to be supplied to the central conductor via the second coaxial cable 11.

[0118] In this embodiment, a wire or shaft (not shown) is connected to the blades 20, 20. Pushing or pulling the wire or shaft opens and closes the blades 20, 20. For example, by passing the wire or shaft (not shown) through the hole 14 of the instrument rod 5, and operating the control lever (trigger) 5b connected to the base end of the instrument rod 5, pushing or pulling the wire or shaft opens and closes the blades 20, 20. Alternatively, by providing a drive mechanism on the instrument rod 5 to rotate the wire or shaft around an axis, the blades 20, 20 can rotate along with the rotation of the wire or shaft. This drive mechanism is, for example, provided in the grip portion 5a.

[0119] The cylindrical cap 12 is configured such that the instrument rod 5 passes through its inner side, and is formed of a flexible insulating material (e.g., resin). One end of the cylindrical cap 12 is fixed to the outer surface of the instrument rod 5 at a midpoint 5c. The rod-side terminals 6A and 6B are located further from the front end of the instrument rod 5 than at the midpoint 5c. Figure 1 (On the left side). For example, by making the inner diameter of the opening at one end of the cylindrical cap 12 match the outer diameter of the position 5c of the instrument rod 5, the above-mentioned "fixing one end of the cylindrical cap 12 at the middle position 5c of the instrument rod 5" can be achieved (in this case, the friction generated between the opening edge at one end of the cylindrical cap 12 and the outer surface of the position 5c of the instrument rod 5 is used to fix one end of the cylindrical cap 12 at the position 5c of the instrument rod 5). Alternatively, an adhesive can be used to fix one end of the cylindrical cap 12 at the middle position 5c of the instrument rod 5.

[0120] In the power supply of this embodiment, such as Figure 5 As shown in (a), the instrument rod 5 is inserted through the through hole 13 from one end of the puncture cannula 2, as shown in (a). Figure 5 (b) Figure 5 As shown in (c), by positioning the front end of the instrument rod 5 to extend from the other end of the puncture cannula 2, one of the rod-side terminals 6A and 6B can be brought into contact with the puncture cannula-side terminal 3A, and the other terminal 6 can be brought into contact with the puncture cannula-side terminal 3B. Figure 5 (b) shows the state where the length D of the instrument rod 5 extending from the other end of the puncture cannula 2 is at its shortest when terminals 3 and 6 are in contact. Figure 5 (c) shows the state where the length D of the instrument rod 5 extending from the other end of the puncture cannula 2 is at its longest when terminals 3 and 6 are in contact. Additionally, in Figure 5 (b) Figure 5In (c), the state in which terminal 6A is in contact with terminal 3A and terminal 6B is in contact with terminal 3B is shown. However, by rotating the instrument lever 5 relative to the puncture cannula 2 from this state, it is possible to make terminal 6B contact with terminal 3A and terminal 6A contact with terminal 3B in the opposite manner as described above. In the following text, the phrase "one of the lever-side terminals 6A and 6B is in contact with the puncture cannula-side terminal 3A and the other terminal 6 is in contact with the puncture cannula-side terminal 3B" is appropriately abbreviated as "the puncture cannula-side terminal 3 is in contact with the lever-side terminal 6".

[0121] Furthermore, as described above, by contacting the puncture cannula-side terminal 3 with the rod-side terminal 6, the power supply path on the power supply side (the power supply path composed of power supply lines 4A and 4B and terminals 3A and 3B) is connected to the power supply path on the receiving part J side (the power supply path composed of terminals 6A and 6B and power supply lines 7A and 7B). This allows DC power from a DC power source to be supplied to the receiving part J via the puncture cannula-side power supply lines 4A and 4B, the puncture cannula-side terminals 3A and 3B, the rod-side terminals 6A and 6B, and the rod-side power supply lines 7A and 7B. For example, as... Figure 5 (b) Figure 5 As shown in (c), with terminal 3A in contact with terminal 6A and terminal 3B in contact with terminal 6B, the aforementioned DC power flows in the following sequence: positive terminal of DC power supply → power supply line 4A → terminal 3A → terminal 6A → power supply line 7A → receiver J → power supply line 7B → terminal 6B → terminal 3B → power supply line 4B → negative terminal of DC power supply. However, unlike the illustrated example, with terminal 3A in contact with terminal 6B and terminal 3B in contact with terminal 6A, the aforementioned DC power flows in the following sequence: positive terminal of DC power supply → power supply line 4A → terminal 3A → terminal 6B → power supply line 7B → receiver J → power supply line 7A → terminal 6A → terminal 3B → power supply line 4B → negative terminal of DC power supply.

[0122] Furthermore, as described above, when the puncture cannula-side terminal 3 is in contact with the rod-side terminal 6 (connecting the power supply path on the power supply side to the power receiving part J), by supplying DC power to the microwave oscillator 8 and microwave amplifier 9 of the power receiving part J, the microwave oscillator 8 can generate microwaves. These microwaves are then supplied to the microwave amplifier 9 via the first coaxial cable 10 and amplified. The amplified microwaves are then supplied to the central conductor of the front end (knife 20, 20) of the instrument rod 5 via the second coaxial cable 11 and emitted from the central conductor. The frequency of the microwaves emitted from the central conductor is not particularly limited, but is preferably 300MHz to 6GHz, more preferably 2.45GHz ± 50MHz.

[0123] In addition, as described above, by adjusting the setting position, length, and thickness of the puncture cannula side terminal 3 and the rod side terminal 6, the inner diameter of the puncture cannula 2, and the outer diameter of the instrument rod 5, it is possible to make the puncture cannula side terminal 3 contact the rod side terminal 6 as the instrument rod 5 passes through the through hole 13.

[0124] Furthermore, in the power supply of this embodiment, such as Figure 5 (b) Figure 5 As shown in (c), with the puncture cannula-side terminal 3 in contact with the rod-side terminal 6, the other end of the cylindrical cap 12 contacts one end of the puncture cannula 2. The entire rod-side terminal 6 is housed within the space formed by the inner side of the cylindrical cap 12 and the through hole 13 of the puncture cannula 2. This is to prevent electric shock to the surgeon due to contact with the terminal 6, which can be achieved by adjusting the length of the puncture cannula 2, the cylindrical cap 12, the puncture cannula-side terminal 3, and the rod-side terminal 6, the fixing position 5c of one end of the cylindrical cap 12, and the positions of the puncture cannula-side terminal 3 and the rod-side terminal 6. Furthermore, as described above, the cylindrical cap 12 is formed of a flexible insulating material. As the instrument rod 5 passes through the through hole 13, and the fixing position 5c of one end of the cylindrical cap 12 approaches the puncture cannula 2, the cylindrical cap 12 is gradually compressed. Figure 5 (a) and Figure 5 (b) shows the state of the cylindrical cap 12 when it is not compressed. Figure 5 (c) shows the state of the cylindrical cap 12 when it is compressed.

[0125] When using the power supply of this embodiment during surgery, firstly, the puncture cannula 2 is perforated and placed at the patient's H ( Figure 3 The body wall. At this time, the orientation of the puncture cannula 2 is adjusted so that one end of the puncture cannula 2 is located outside the body and the other end of the puncture cannula 2 is inserted into the body. As shown in the example, when the puncture cannula 2 has a large diameter portion 2a at one end and a small diameter portion 2b at the other end, for example, the small diameter portion 2b is inserted into the body until the large diameter portion 2a contacts the surface of the body wall.

[0126] Next, the power supply lines 4A and 4B on the side of the puncture cannula are fixed to the body wall surface of the subject H.

[0127] Next, the instrument rod 5 is inserted through the through hole 13 from one end of the puncture cannula 2, so that the front end of the instrument rod 5 extends into the body from the other end of the puncture cannula 2, positioning the blades 20 and 20 (the front ends of the instrument rod 5) at the surgical site inside the body. At this time, by operating the control rod 5b, the blades 20 and 20 are opened and closed, and the blades 20 and 20 are used to clamp the area to be coagulated and cut, performing coagulation (hemostasis) and cutting operations.

[0128] Furthermore, as described above, when the blades 20 and 20 are positioned at the surgical site within the body, if the puncture cannula-side terminal 3 contacts the rod-side terminal 6, operation can be performed at the surgical site by turning on the switch connected to the power supply. That is, by turning on the switch, DC power is supplied to the receiving unit J, microwaves are generated from the microwave oscillator 8, and these microwaves are supplied to the microwave amplifier 9 and amplified. The amplified microwaves are then supplied to the central conductor of the blades 20 and 20 and emitted towards the coagulation and cutting site. This cauterizes the surgical site and achieves hemostasis. In addition, the microwaves emitted from the central conductor towards the surgical site flow to the outer conductor of the nearby blades 20 and 20. Furthermore, with the switch turned on, if the instrument rod 5 is inserted through the through hole 13 of the puncture cannula 2 and the puncture cannula-side terminal 3 contacts the rod-side terminal 6, DC power is supplied to the receiving unit J from the moment the terminals 3 and 6 contact, and microwaves are emitted from the blades 20 and 20 (the front end of the instrument rod 5).

[0129] According to the power supply device of this embodiment described above, a simple mechanism is used to connect the power supply path (power supply lines 4A, 4B and terminals 3A, 3B) on the power supply side to the power supply path (terminals 6A, 6B and power supply lines 7A, 7B) on the power receiving part J side by contacting the piercing sleeve side terminal 3 and the rod side terminal 6, thereby enabling power to be supplied to the power receiving part J. Therefore, the power supply device of this embodiment can achieve power supply to the power receiving part J at low cost.

[0130] Furthermore, according to the power supply device of this embodiment, since the power supply lines 4A and 4B on the power supply side are connected to the terminals 3A and 3B of the puncture cannula 2, the movement of the instrument rod 5 is not restricted, unlike the case where the power supply lines on the power supply side are connected to the instrument rod 5. Therefore, fine manipulation of the instrument rod 5 is possible. As a result, the safety of the patient H can be improved.

[0131] Furthermore, according to the power supply of this embodiment, since the power supply lines 4A and 4B on the puncture cannula side are connected to the puncture cannula 2, which has a puncture hole in the body wall of the subject H, therefore... Figure 3 As shown, the power supply cables 4A and 4B can be fixed along the body wall surface of the patient H. Moreover, if this is done, since the power supply cables 4A and 4B will not become intertwined in the space on the operating table, surgical support operations can also be performed smoothly.

[0132] According to the power supply of this embodiment, since a rigid coaxial cable is not used, and the puncture cannula side terminal 3 is connected to the power supply using the power supply line 4, when the instrument rod 5 is operated to change the state of the instrument rod 5 and the puncture cannula 2 while the instrument rod 5 is inserted into the puncture cannula 2, the load applied to the instrument rod 5 from the puncture cannula 2 can be suppressed to a smaller load. Therefore, the operation of the instrument rod 5 can be performed easily (i.e., the state of the instrument rod 5 and the puncture cannula 2 can be changed easily). For example, when tilting the instrument rod 5 to change the angle of the instrument rod 5 and the puncture cannula 2, since the load applied to the instrument rod 5 from the puncture cannula 2 is small, the tilting operation of the instrument rod 5 can be performed easily (i.e., the angle of the instrument rod 5 and the puncture cannula 2 can be changed easily).

[0133] Furthermore, according to the power supply of this embodiment, the terminals 3A and 3B on the puncture sleeve side are in the radial direction E of the puncture sleeve 2. Figure 4 On (a)) opposite each other, the rod-side terminals 6A and 6B are in the radial direction F of the instrument rod 5. Figure 4 (b) On the opposite side, the width Ha of the rod-side terminals 6A and 6B is ( Figure 4 (b) The width Hb of the gap S ( Figure 4 (a) is small. Therefore, even if the instrument lever 5 is rotated during the operation, there will be no situation where a terminal 6 (terminal 6A or terminal 6B) comes into contact with both terminals 3A and 3B on the puncture cannula side, and therefore no short circuit will occur between the terminals.

[0134] Furthermore, according to the power supply of this embodiment, during the contact between the puncture sleeve side terminal 3 and the rod side terminal 6 and the supply of power to the receiving part J, the rod side terminals 6A and 6B are entirely housed within the space formed by the inner side of the cylindrical cover 12 and the through hole 13 of the puncture sleeve 2. Figure 1 (b) Figure 5 (b) Figure 5 (c) Therefore, it is possible to prevent electric shock to the operator or others due to contact with the rod-side terminals 6A and 6B.

[0135] Furthermore, according to the power supply of this embodiment, since microwaves are emitted from the front end (blade 20, 20) of the instrument rod 5, the water molecules in the biological tissue of the subject H are excited, which heats the biological tissue itself. Therefore, the biological tissue is not scorched, and the surrounding damage area is minimized.

[0136] Furthermore, the present invention is not limited to the embodiments described above, and various modifications can be made. In the following description, variations of the present invention will be described. Additionally, in the following description, points differing from the above embodiments will be emphasized; for configurations common to the above embodiments, the same reference numerals will be used, and descriptions will be omitted.

[0137] In the above embodiment, it is shown that the power supply lines 4A and 4B on the puncture cannula side open from the opening 13a located at one end of the puncture cannula 2. Figure 1 Example of inserting through hole 13 (b) but as Figure 6 As shown, the power supply lines 4A and 4B on the puncture cannula side can also penetrate the cylinder wall of the puncture cannula 2. In this case, the ends of the power supply lines 4A and 4B extending into the through hole 13 are connected to the puncture cannula side terminals 3A and 3B, respectively. Furthermore, in the illustrated example, the power supply lines 4A and 4B on the puncture cannula side penetrate the cylinder wall of the large-diameter portion 2a, but they can also penetrate the cylinder wall of the small-diameter portion 2b.

[0138] In addition, such as Figure 6 As shown, the gas delivery tube 40 can also be connected to the puncture cannula 2, and the power supply can be configured to allow gas G flowing within the gas delivery tube 40 to enter the through-hole 13 and exit from the opening 13b at the other end of the puncture cannula 2. If this is done, it is possible to prevent the patient H ( Figure 3 The bodily fluids flow from opening 13b into the through hole 13. Additionally, in Figure 6 In the example, by connecting the gas delivery tube 40 to the hole 41 in the wall of the puncture cannula 2, the gas G flowing in the gas delivery tube 40 is introduced into the through hole 13. Moreover, by making the diameter of the opening 13a of the through hole 13 at one end of the puncture cannula 2 substantially the same as the outer diameter of the instrument rod 5, most of the gas G introduced into the through hole 13 is discharged from the opening 13b at the other end of the puncture cannula 2.

[0139] Furthermore, in the above embodiment, an example is shown where a set of rod-side terminals 6A and 6B are disposed on the instrument rod 5, but as... Figure 7 as well as Figure 8 As shown, multiple pairs of rod-side terminals 6A and 6B can also be arranged at intervals along the axial direction of the instrument rod 5. In this case, rod-side power supply lines 7A and 7B for connecting each pair of rod-side terminals 6A and 6B to the power receiving part J are provided on the instrument rod 5. Moreover, by inserting a set of rod-side terminals 6A and 6B into the through hole 13 and contacting them with the puncture cannula-side terminals 3A and 3B, DC power can be supplied to the power receiving part J, and microwaves can be emitted from the blades 20 and 20 (the front end of the instrument rod 5).

[0140] In the illustrated example, a pair of terminals 6Aa and 6Ba and a pair of terminals 6Ab and 6Bb are spaced apart along the axial direction of the instrument rod 5. Terminal 6Aa is connected to the power receiving part J via power supply line 7Aa, terminal 6Ab is connected to the power receiving part J via power supply line 7Ab, terminal 6Ba is connected to the power receiving part J via power supply line 7Ba, and terminal 6Bb is connected to the power receiving part J via power supply line 7Bb.

[0141] Moreover, such as Figure 7 (a) and Figure 8 As shown, with terminals 6Aa and 6Ba in contact with terminals 3A and 3B, DC power from a DC power source can be supplied to the receiving unit J via power supply lines 4A and 4B, terminals 3A and 3B, terminals 6Aa and 6Ba, and power supply lines 7Aa and 7Ba, thus enabling the emission of microwaves from terminals 20 and 20.

[0142] In addition, such as Figure 7 As shown in (b), with terminals 6Ab and 6Bb in contact with terminals 3A and 3B, DC power from a DC power source can be supplied to the receiving unit J via power supply lines 4A and 4B, terminals 3A and 3B, terminals 6Ab and 6Bb, and power supply lines 7Ab and 7Bb, thus enabling the emission of microwaves from terminals 20 and 20.

[0143] In addition, such as Figure 7 as well as Figure 8 As shown, when multiple pairs of rod-side terminals 6A and 6B are provided on the instrument rod 5, it is preferable that when one set of terminals 6A and 6B is in contact with terminals 3A and 3B, the entire set of terminals 6A and 6B is housed inside the through hole 13 of the puncture cannula 2. Doing so prevents electric shock to the surgeon or others due to contact with terminals 6A and 6B.

[0144] Furthermore, it is preferable to set the interval K between two groups of rod-side terminals 6A and 6B that are adjacent in the axial direction of the instrument rod 5. Figure 8 The length L of the terminals 6A and 6B on the puncture sleeve side is equal to that of the terminals 3A and 3B. If this is done, it is possible to bring another set of terminals 6A and 6B into contact with terminals 3A and 3B immediately after one set of terminals 6A and 6B has left terminals 3A and 3B (in the illustrated example, it is possible to bring terminals 6Ab and 6Bb into contact with terminals 3A and 3B immediately after terminals 6Aa and 6Ba have left terminals 3A and 3B). Therefore, the number of terminals 6 provided on the rod 5 can be minimized, and DC power can be continuously supplied to the receiving part J.

[0145] Furthermore, in the above embodiment, an example is shown of fixing the rod-side terminals 6A and 6B to the outer surface of the instrument rod 5 using screws and adhesive. However, the rod-side terminals 6A and 6B can also be mounted on the outer surface of the instrument rod 5 using springs. (See also...) Figures 9 to 12 An example of a power supply that has undergone this change is provided.

[0146] Figure 9 This is a longitudinal cross-sectional schematic diagram of a power supply device according to a modified example of the present invention. Figure 10 It is shown in Figure 9 (a) shows a schematic cross-section of the AA line in the state where the power supply is cut off. Figure 11 It is shown in magnification Figure 9 A schematic diagram of a longitudinal section of a portion of the power supply shown. Figure 12 (a) is Figure 9 The diagram shows a cross-sectional view of the puncture sleeve 2 of the power supply device. Figure 12 (b) is Figure 9 A schematic cross-sectional view of the instrument rod 5 of the power supply unit shown.

[0147] exist Figure 9 In the power supply of the modified example shown, a pair of rod-side terminals 6C and 6D are provided on the outer surface of the instrument rod 5. The rod-side terminals 6C and 6D are respectively disposed in the recess 50 formed on the outer surface of the instrument rod 5, supported by springs (not shown). The springs are leaf springs or coil springs, and are mounted on the outer surface of the instrument rod 5 (for example, the surface of the recess 50).

[0148] The rod-side terminals 6C and 6D are positioned in the radial direction F of the instrument rod 5. Figure 12 (b)) The relative configuration of the rod-side terminals 6C and 6D, with width Ha( Figure 12 (b) is the width Hb of the gap S between terminals 3A and 3B on the puncture cannula side. Figure 12 (a)) is short. In addition, the above-mentioned rod-side terminals 6C and 6D being opposite each other in the radial direction F means that the center of the width of terminal 6C and the center of the width of terminal 6D are located on the same straight line extending in the radial direction F.

[0149] The instrument rod 5 is provided with a first rod-side power supply line 7C for connecting the rod-side terminal 6C to the power receiving part J, and a second rod-side power supply line 7D for connecting the rod-side terminal 6D to the power receiving part J. The first rod-side power supply line 7C and the second rod-side power supply line 7D extend axially along the instrument rod 5. The first rod-side power supply line 7C passes through a recess 50 where the rod-side terminal 6C is located, and the second rod-side power supply line 7D passes through a recess 50 where the rod-side terminal 6D is located.

[0150] While the lever-side terminals 6C and 6D are located outside the puncture cannula 2, the compression length of the springs supporting terminals 6C and 6D is small (the springs only generate compression due to the weight of the lever-side terminals 6). Therefore, the distances La and Lb from the center of the instrument lever 5 to the outer edges of the lever-side terminals 6A and 6B are... Figure 12 (b) is respectively compared to the inner diameter R of the through hole 13 of the puncture cannula 2. Figure 12 (a) is large, so that the rod-side terminal 6C does not contact the first rod-side power supply line 7C passing through the recess 50 and the rod-side terminal 6D does not contact the second rod-side power supply line 7D passing through the recess 50.

[0151] Furthermore, by pressing the rod-side terminals 6C and 6D with their fingers, the springs of the support terminals 6C and 6D are compressed, making the distances La and Lb equal to the inner diameter R of the through hole. Figure 10 As shown, the rod-side terminal 6C can be made to contact the first rod-side power supply line 7C passing through the recess 50, and the rod-side terminal 6D can be made to contact the second rod-side power supply line 7D passing through the recess 50. Furthermore, in this state, the rod-side terminals 6C and 6D are inserted into the through hole 13 of the puncture cannula 2, so that one terminal 6 of the rod-side terminals 6C and 6D contacts the puncture cannula-side terminal 3A, and the other terminal 6 contacts the puncture cannula-side terminal 3B. This connects the power supply path on the power supply side (the power supply path formed by power supply lines 4A and 4B and terminals 3A and 3B) with the power supply path on the receiving part J side (the power supply path formed by terminals 6C and 6D and power supply lines 7C and 7D). Thus, DC power from a DC power source can be supplied to the receiving part J, and microwaves can be emitted from the front end (blade 20, 20) of the instrument rod 5. In addition, by utilizing the reaction force of the spring that counteracts compression, the terminals 3A and 3B on the puncture sleeve side and the terminals 6C and 6D on the rod side are kept in contact, thus enabling a continuous supply of power to the receiving part J.

[0152] Furthermore, in the power supply of the above-described modified example, it is preferable to appropriately adjust the dimensions of the puncture cannula 2, the puncture cannula-side terminals 3A and 3B, and the rod-side terminals 6C and 6D, so that the rod-side terminals 6C and 6D, which are in contact with the puncture cannula-side terminals 3A and 3B, are entirely contained within the through hole 13 of the puncture cannula 2. Doing so prevents electric shock to the surgeon or others due to contact with the rod-side terminals 6C and 6D.

[0153] In addition, such as Figure 9As shown, multiple sets of rod-side terminals 6C and 6D can be spaced apart along the axial direction of the instrument rod 5. In this case, the first rod-side power supply line 7C passes through the recess 50 where one of the rod-side terminals 6C from each set is disposed, and the second rod-side power supply line 7D passes through the recess 50 where another rod-side terminal 6D from each set is disposed (in the illustrated example, the sets of terminals 6Ca and 6Da are spaced apart from the sets of terminals 6Cb and 6Db on the instrument rod 5, the first rod-side power supply line 7C passes through the recess 50 where terminal 6Ca is disposed and the recess 50 where terminal 6Cb is disposed, and the second rod-side power supply line 7D passes through the recess 50 where terminal 6Da is disposed and the recess 50 where terminal 6Db is disposed).

[0154] Furthermore, with one of the rod-side terminals 6C and 6D in contact with the first rod-side power supply line 7C passing through the recess 50 and the other terminal 6D in contact with the second rod-side power supply line 7D passing through the recess 50, the set of rod-side terminals 6C and 6D is inserted into the through hole 13 of the puncture cannula 2, and one of the rod-side terminals 6C and 6D is in contact with the puncture cannula side terminal 3A and the other terminal 6D is in contact with the puncture cannula side terminal 3B. This allows DC power to be supplied to the receiving part J, thus enabling microwaves to be emitted from the blades 20, 20 (the front end of the instrument rod 5).

[0155] For example, such as Figure 9 of (a), Figure 10 , Figure 11 As shown, when the rod-side terminals 6Ca and 6Da are in contact with the power supply lines 7C and 7D respectively, and the rod-side terminals 6Ca and 6Da are in contact with the puncture sleeve-side terminals 3A and 3B respectively, DC power from the DC power supply can be supplied to the receiving part J through the power supply lines 4A and 4B, terminals 3A and 3B, terminals 6Ca and 6Da, and power supply lines 7C and 7D, thus enabling the emission of microwaves from the blades 20 and 20.

[0156] In addition, such as Figure 9 As shown in (b), when the rod-side terminals 6Cb and 6Db are in contact with the power supply lines 7C and 7D respectively, and the rod-side terminals 6Cb and 6Db are in contact with the puncture sleeve-side terminals 3A and 3B respectively, DC power from the DC power supply can be supplied to the receiving part J through the power supply lines 4A and 4B, terminals 3A and 3B, terminals 6Cb and 6Db, and power supply lines 7C and 7D, thus microwaves can be emitted from the blades 20 and 20.

[0157] Furthermore, as described above, when multiple sets of rod-side terminals 6C and 6D are provided on the instrument rod 5, it is preferable that the entire set of rod-side terminals 6C and 6D is housed inside the through hole 13 of the puncture cannula 2 while one set of rod-side terminals 6C and 6D is in contact with the puncture cannula-side terminals 3A and 3B. Doing so prevents electric shock to the surgeon or others due to contact with the rod-side terminals 6C and 6D.

[0158] Furthermore, it is preferable to make the interval M between two sets of rod-side terminals 6C, 6D that are adjacent in the axial direction of the instrument rod 5 ( Figure 11 The length L of the terminals 6C and 6D is equal to that of the terminals 3A and 3B on the piercing sleeve side. If this is done, it is possible to bring another set of terminals 6C and 6D into contact with terminals 3A and 3B immediately after one set of terminals 6C and 6D has left terminals 3A and 3B (in the illustrated example, it is possible to bring terminals 6Cb and 6Db into contact with terminals 3A and 3B immediately after terminals 6Ca and 6Da have left terminals 3A and 3B). Therefore, the number of rod-side terminals 6 can be minimized, and DC power can be continuously supplied to the receiving part J.

[0159] In the illustrated example, a single first rod-side power supply line 7C is used to connect each group of rod-side terminals 6C (6Ca, 6Cb) to the power receiving unit J, and a single second rod-side power supply line 7D is used to connect each group of rod-side terminals 6D (6Da, 6Db) to the power receiving unit J. However, rod-side power supply lines 7 for connecting to the power receiving unit J can also be provided for each rod-side terminal 6C, 6D. For example, as illustrated, when there are groups of terminals 6Ca, 6Da and groups of terminals 6Cb, 6Db, power supply lines 7 for connecting terminals 6Ca to the power receiving unit J, 6Cb to the power receiving unit J, 6Da to the power receiving unit J, and 6Db to the power receiving unit J can be provided on the instrument rod 5.

[0160] Furthermore, when the instrument rod 5 is provided with multiple sets of rod-side terminals 6C, 6D, the power supply of the present invention can be as follows: Figures 13 to 16 The deformation is performed as shown. Figure 13 as well as Figure 14 This is a schematic longitudinal section of a power supply device illustrating a modified example of the present invention. Figure 13 This shows the state in contact between the rod-side terminals 6Ca and 6Da and the puncture cannula-side terminals 3A and 3B. Figure 14 The diagram shows the state in contact between the rod-side terminals 6Cb and 6Db and the puncture sleeve-side terminals 3A and 3B. Figure 15 It is shown in magnification Figure 13 A partial cross-sectional view, Figure 16 It is shown in magnification Figure 14 A partial cross-sectional view.

[0161] exist Figures 13 to 16 In the power supply device shown, the first rod-side power supply line 7C is composed of a plurality of first wires 70 continuously arranged in the axial direction of the instrument rod 5, and the second rod-side power supply line 7D is composed of a plurality of second wires 71 continuously arranged in the axial direction of the instrument rod 5. In the following text, as... Figure 13 as well as Figure 14 As shown, an example is given of a power supply line 7C consisting of two first wires 70A and 70B, and a power supply line 7D consisting of two second wires 71A and 71B. However, the number of wires 70 and 71 constituting the power supply lines 7C and 7D is not limited to two, and can be more than three depending on the number of groups of pole-side terminals 6C and 6D.

[0162] One end 70a of the first wire 70B, which is closest to the power receiving part J among the multiple first wires 70A and 70B constituting the first rod-side power supply line 7C, is connected to the power receiving part J. The other end 70b of the power receiving part extends into the recess 50B formed by the closest power receiving part J among the recesses 50A and 50B of the recesses 50A and 50B of the remaining first wires 70A, which are arranged as one of the rod-side terminals 6C and 6D of each pair of rod-side terminals 6C and 6D. One end 70a of the remaining first wire 70A is close to the power receiving part, and the other end 70b of the remaining first wires 70A extends into the recesses 50A and 50B of the remaining first wires 70A, which are arranged as one of the rod-side terminals 6C and 6D of each pair of rod-side terminals 6C and 6D and are adjacent to each other in the axial direction of the instrument rod 5.

[0163] The plurality of first wires 70A and 70B constituting the power supply line 7C are respectively positioned in the recess 50 with their other ends 70b supported by springs (not shown). By pushing the rod-side terminal 6C into the recess 50, the rod-side terminal 6C can be brought into contact with the other end 70b of the first wire 70 positioned in the recess 50 (for example, by pushing the rod-side terminal 6Ca into the recess 50A, the rod-side terminal 6Ca can be brought into contact with the other end 70b of the first wire 70A). The springs are leaf springs or coil springs and are mounted on the outer surface of the instrument rod 5 (e.g., the surface of the recess 50).

[0164] Furthermore, the recesses 50B extending from the ends 70a and 70b of the two adjacent first wires 70A and 70B (i.e., the recesses 50B extending from one end 70a of the first wire 70A on the far side of the power receiving part and the other end 70b of the first wire 70B on the near side of the power receiving part), such as Figure 15 As shown, when the rod-side terminal 6Cb is not pushed into the recess 50B, the other end 70b of the first wire 70B on the proximal side of the power receiving part is lifted by the spring force, thereby coming into contact with one end 70a of the first wire 70A on the distal side of the power receiving part. Furthermore, as... Figure 16As shown, when the rod-side terminal 6Cb is pushed into the recess 50B, the other end 70b of the first wire 70B on the near side of the power receiving part is pushed by the rod-side terminal 6Cb, and the other end 70b of the first wire 70B on the near side of the power receiving part becomes a state that is separated from the end 70a of the first wire 70A on the far side of the power receiving part.

[0165] In addition, such as Figure 13 as well as Figure 14 As shown, of the plurality of second wires 71A and 71B constituting the second rod-side power supply line 7D, the end 71a of the second wire 71B closest to the power receiving part J is connected to the power receiving part J, and the other end 71b of the power receiving part extends into the recess 50D formed closest to the power receiving part J in the recesses 50C and 50D of the other of each pair of rod-side terminals 6A and 6B. The remaining second wires 71A, the end 71a of the power receiving part close to the power receiving part and the other end 71b of the power receiving part extend into the recesses 50C and 50D formed adjacent to each other in the axial direction of the instrument rod 5, which are the recesses 50C and 50D of the other of each pair of rod-side terminals 6A and 6B.

[0166] The multiple second wires 71A and 71B constituting the power supply line 7D are arranged in the recess 50 with their other ends 71b supported by springs (not shown). By pushing in the rod-side terminal 6D arranged in the recess 50, the rod-side terminal 6D can be brought into contact with the other end 71b of the second wire 71 (for example, by pushing the rod-side terminal 6Da into the recess 50C, the rod-side terminal 6Da can be brought into contact with the other end 71b of the second wire 71A). The springs mentioned above are leaf springs or coil springs, and are mounted on the outer surface of the instrument rod 5 (e.g., the surface of the recess 50).

[0167] Furthermore, the recesses 50D extending from the ends 71a and 71b of the two adjacent second wires 71A and 71B (i.e., the recesses 50D extending from one end 71a of the second wire 71A on the far side of the power receiving part and the other end 71b of the second wire 71A on the near side of the power receiving part), such as Figure 15 As shown, when the rod-side terminal 6Db is not pushed into the recess 50D, the other end 71b of the second wire 71B on the near side of the receiving part is lifted by the spring force, and becomes in contact with one end 71a of the second wire 71A on the far side of the receiving part. Moreover, as Figure 16 As shown, when the rod-side terminal 6Db is pushed into the recess 50D, the other end 71b of the second wire 71B on the proximal side of the power receiving part is pushed by the rod-side terminal 6Db, and the other end 71b of the second wire 71B on the proximal side of the power receiving part becomes a state that is separated from the end 71a of the second wire 71A on the distal side of the power receiving part.

[0168] Figures 13 to 16 The power supply shown, having the above configuration, allows for the following: when one of a pair of rod-side terminals 6C and 6D is pushed into the recess 50 and contacts the other end 70b of a first wire 70 extending into the recess 50, and the other rod-side terminal 6D is pushed into the recess 50 and contacts the other end 71b of a second wire 71 extending into the recess 50, the set of rod-side terminals 6C and 6D can be inserted into the through hole 13 of the piercing sleeve 2. This allows one rod-side terminal 6C of the set of rod-side terminals 6C and 6D to contact one of a pair of piercing sleeve-side terminals 3A and 3B, and the other rod-side terminal 6D of the set of rod-side terminals 6C and 6D to contact the other of a pair of piercing sleeve-side terminals 3A and 3B. Figure 16 Power from the power source can be supplied to the power receiving unit J through the first puncture cannula side power supply line 4A and the second puncture cannula side power supply line 4B, a pair of puncture cannula side terminals 3A and 3B, a pair of rod side terminals 6C and 6D, the range of the first rod side power supply line 7C extending from the other end 70b of the first wire 70 to the power receiving unit J, and the range of the second rod side power supply line 7D extending from the other end 70b of the second wire 71 to the power receiving unit J.

[0169] For example, such as Figure 16 As shown, with the rod-side terminal 6Cb in contact with the other end 70b of the first wire 70B and the puncture sleeve-side terminal 3A, and the rod-side terminal 6Db in contact with the other end 71b of the second wire 71B and the puncture sleeve-side terminal 3B, power from the power source can be supplied to the power receiving unit J through the power supply lines 4A, 4B, the puncture sleeve-side terminals 3A, 3B, the rod-side terminals 6C, 6D, the first wire 70B (the range of the first rod-side power supply line 7C extending from the other end 70b of the first wire 70B towards the power receiving unit), and the second wire (the range of the second rod-side power supply line 7D extending from the other end 70b of the second wire 71 towards the power receiving unit).

[0170] Moreover, according to Figure 13The power supply shown, by performing the aforementioned operation of "pushing one of the paired rod-side terminals 6C and 6D into the recess 50 to contact the other end 70b of a first wire 70 extending into the recess 50, and pushing the other rod-side terminal 6D into the recess 50 to contact the other end 71b of a second wire 71 extending into the recess 50," can prevent the other end 70b of a first wire 70 from contacting one end 70a of the first wire 70 on the power receiving side, and prevent the other end 71b of a second wire 71 from contacting one end 71a of the second wire 71 on the power receiving side. Thus, power can be prevented from flowing to the first wire 70, which is positioned further away from the power receiving side than the first wire 70, and to the second wire 71, which is positioned further away from the power receiving side than the second wire 71.

[0171] For example, in Figure 16 In the state shown, the other end 70b of the first wire 70B does not contact the end 70a of the first wire 70A on the far side of the power receiving part, and the other end 71b of the second wire 71B does not contact the end 71a of the second wire 71A on the far side of the power receiving part, thereby preventing power from flowing to the first wire 70A and the second wire 71A.

[0172] In addition, Figures 1 to 16 In the power supply shown, an insulator 51 can be provided in the gap S between one end of the piercing sleeve side terminals 3A and 3B and the gap S between the other end of the piercing sleeve side terminals 3A and 3B. Figure 17 (a) shows in Figures 1 to 8 The power supply unit shown is a modified example of the insulator 51. Figure 17 (b) shows that Figures 9 to 12 (A modified example of the power supply device with insulator 51 shown). The insulator 51 is made of rubber or resin, etc., and is fixed to the inner surface of the puncture sleeve 2 using adhesive or the like.

[0173] In addition, Figures 1 to 17 In the power supply shown, the receiving part J (microwave output part) is preferably capable of supplying microwave power of 20W to 100W to the front end of the instrument rod 5. If this is done, the microwave power required for surgical techniques such as hemostasis can be supplied to the front end of the instrument rod 5, and the size, volume and weight of the receiving part J can be suppressed to about 50mm × 100mm × 5mm, a single-digit cubic centimeter and a single-digit gram (for example, about 5g), respectively. Therefore, it is easy to install the receiving part J (microwave output part) into the grip part 5a of the instrument rod 5.

[0174] In cases where microwaves are supplied directly from the outside as in the past, a thick and rigid coaxial cable with a diameter of approximately 10 mm is required. According to... Figures 1 to 17 The power supply shown can easily achieve a power conversion efficiency of approximately 50% for the microwave amplifier 9 by supplying DC power to the receiving part J. Furthermore, with the microwave amplifier 9 achieving an efficiency of approximately 50%, to supply microwave power of 20W to 100W or more to the tip of the instrument rod 5, since the power supplied to the receiving part J only needs to be 200W or less, extremely thin power supply wires with a diameter of approximately 1mm can be used as the power supply wire 4 on the puncture cannula side and the power supply wire 7 on the rod side. Moreover, since the power supply wire 4 on the puncture cannula side is extremely thin, the operability of the instrument rod 5 when it is inserted into the puncture cannula 2 can be significantly improved.

[0175] Furthermore, as described above, in order to supply microwave power capable of surgery using extremely fine power supply lines 4 and 7, it is preferable that the frequency of the microwave emitted from the front end of the instrument handle 5 is 300 MHz or more and 6 GHz or less, more preferably 2.45 GHz ± 50 MHz. Additionally, it is preferable that the power conversion efficiency (ratio of output microwave power to used DC power) of the microwave amplifier is 30% or more and 80% or less, more preferably 50% or more. Furthermore, it is preferable that the microwave output supplied to the front end of the instrument handle 5 is 20 W or more and 100 W or less, more preferably 30 W or more and 60 W or less. Furthermore, it is preferable that the DC power supplied to the power receiving unit J is 10 W or more and 150 W or less, more preferably 50 W or more and 100 W or less.

[0176] Furthermore, for example, by using gallium nitride transistors in microwave amplifier 9, it is possible to achieve a power conversion efficiency of over 50% for microwave amplifier 9. In particular, if gallium nitride HEMTs (high electron mobility transistors) are used, high power conversion efficiency can be obtained. If the microwave amplifier 9 with the aforementioned high power conversion efficiency is used, the necessary power supplied from the outside can be suppressed to a smaller amount of power, thus allowing the power supply lines 4 and 7 to be thinner and lighter.

[0177] Furthermore, in the aforementioned power supply unit, the receiving unit J can include a DC power supply unit and a microwave output unit. In this case, the DC power supply unit constitutes a microwave oscillator that generates microwaves and a microwave amplifier that amplifies the microwaves. The DC power supplied from the outside is used as the DC power supply (drive source) to operate the microwave oscillator and the microwave amplifier. Additionally, in the aforementioned case, a voltage control unit capable of controlling the voltage can be added to the microwave output unit. Furthermore, in the aforementioned case, an impedance matching circuit and an output control circuit can be added to the receiving unit J.

[0178] Furthermore, while an example of connecting the microwave oscillator 8 and the microwave amplifier 9 using a coaxial cable has been shown above, when the microwave oscillator 8 and the microwave amplifier 9 are arranged close together or when the microwave oscillator 8 and the amplifier 9 are formed on the same circuit board, the connection between the microwave oscillator 8 and the microwave amplifier 9 can also be made using microwave transmission lines such as microstrip lines.

[0179] Additionally, the aforementioned power supply unit may also include a receiving unit J that outputs microwaves by being supplied with AC power from an AC power source. Here, AC power refers to AC power at the frequency of mains electricity supplied by household power lines (in Japan, the frequency is 50Hz or 60Hz, and the voltage is approximately 100V).

[0180] In the above scenario, AC power is supplied to the receiving unit J via AC power lines 4A and 4B on the puncture sleeve side and 7A, 7B or 7C, 7D on the pole side. The receiving unit J includes at least an inverter, a microwave oscillator, and a microwave amplifier. The inverter converts the AC power supplied to the receiving unit J from the AC power source into DC power. The microwave oscillator uses the DC power converted from the inverter as a DC power source (drive source) to generate microwaves. The microwave amplifier uses the DC power converted from the inverter as a DC power source (drive source) to amplify the microwaves.

[0181] As described above, when AC power is supplied to the power receiving unit J, it is easy to achieve a power conversion efficiency of approximately 90% for the converter, thus easily making the AC power supplied to the power receiving unit J 1.11 times that of the case where DC power is supplied to the power receiving unit J. Furthermore, as described above, if the power conversion efficiency of the converter is approximately 90% and the AC power supplied to the power receiving unit J is 1.11 times that of the case where DC power is supplied to the power receiving unit J, then under the condition of using an extremely thin power supply line that is essentially the same as the case where DC power is supplied to the power receiving unit J, the same effect as the case where DC power is supplied to the power receiving unit J can be obtained.

[0182] in addition, Figures 1 to 17 The power supply shown can be converted into a power supply equipped with a power receiving unit N capable of outputting high-frequency waves by supplying DC power from a DC power source. In this case, Figures 1 to 17 The power supply shown is a power supply unit that, instead of having a power receiving unit J, a first coaxial cable 10, and a second coaxial cable 11, has a power receiving unit N with a high-frequency oscillator 31 and a high-frequency amplifier 32, a third coaxial cable 33, and a fourth coaxial cable 34 (see reference). Figure 1 , Figure 6 , Figure 7 , Figure 9 , Figure 13 , Figure 14 (The reference numerals in parentheses).

[0183] The power receiving part N, which includes a high-frequency oscillator 31 and a high-frequency amplifier 32, is housed inside the gripping part 5a located at the base end of the instrument rod 5. A third coaxial cable 33 and a fourth coaxial cable 34 are provided on the instrument rod 5. The third coaxial cable 33 connects the high-frequency oscillator 31 and the high-frequency amplifier 32, and the fourth coaxial cable 34 connects the high-frequency amplifier 32 to the front end (knife 20, 20) of the instrument rod 5.

[0184] In the modified power supply with the above-described configuration, with the instrument rod 5 passing through the through hole 13 of the puncture cannula 2 and the puncture cannula-side terminal 3 in contact with the rod-side terminal 6, DC power from a DC power source can be supplied to the power receiving unit N via the puncture cannula-side power supply lines 4A, 4B, puncture cannula-side terminals 3A, 3B, rod-side terminals 6A, 6B or 6C, 6D, and rod-side power supply lines 7A, 7B or 7C, 7D. This causes the high-frequency oscillator 31 to generate a high-frequency wave, which is then supplied to the high-frequency amplifier 32 via the third coaxial cable 33 for amplification. The amplified high-frequency wave is then supplied to and emitted from the front end (blade 20, 20) of the instrument rod 5 via the fourth coaxial cable 34. According to the above power supply, the high-frequency wave emitted from the front end (blade 20, 20) of the instrument rod 5 can be used for cauterization, hemostasis, and cutting of the surgical site. Furthermore, the frequency of the high-frequency wave emitted from the front end of the instrument rod 5 is preferably between 150 kHz and 10 MHz.

[0185] in addition, Figures 1 to 17The power supply shown can be modified to include a power receiver N capable of outputting high frequencies by being supplied with AC power from an AC power source. In this case, the power receiver N includes at least an inverter, a high-frequency oscillator, and a high-frequency amplifier. Furthermore, using AC power lines as the aforementioned puncture cannula-side power lines 4A and 4B, and rod-side power lines 7A, 7B, or 7C and 7D, puncture cannula-side power line 4A connects the puncture cannula-side terminal 3A to the first pole of the AC power source, and puncture cannula-side power line 4B connects the puncture cannula-side terminal 3B to the second pole of the AC power source. Moreover, with the instrument rod 5 penetrating the through hole 13 of the puncture cannula 2 and the puncture cannula-side terminal 3 in contact with the rod-side terminal 6, AC power from the AC power source is supplied to the power receiver N via the puncture cannula-side power lines 4A and 4B, the puncture cannula-side terminals 3A and 3B, the rod-side terminals 6A, 6B, or 6C and 6D, and the rod-side power lines 7A, 7B, or 7C and 7D. The converter converts the AC power supplied from the AC power source to the power receiving unit N into DC power. The high-frequency oscillator uses the DC power converted by the converter as a DC power source (drive source) to generate high-frequency waves. The high-frequency amplifier uses the DC power converted by the converter as a DC power source (drive source) to amplify the high-frequency waves.

[0186] Furthermore, the function of the instrument rod 5 in the power supply device of the present invention is not limited to the functions described above, and can be various functions that can be performed by being supplied with electricity. Furthermore, the application of the power supply device of the present invention is not limited to hemostasis, and can be used for various purposes depending on the function of the instrument rod 5, etc. In addition, the above example illustrates an example where the power receiving part is provided at the base end of the instrument rod 5, but depending on the application of the power supply device, the power receiving part can also be provided at the front end of the instrument rod 5, and power can be supplied to that power receiving part.

[0187] Explanation of reference numerals in the attached figures

[0188] 2. Puncture cannula,

[0189] 3. 3A, 3B puncture cannula side terminals,

[0190] 4. Power supply lines on the puncture sleeve side, 4A, 4B

[0191] 5. Instrument rods,

[0192] 6, 6A, 6Aa, 6Ab, 6B, 6Ba, 6Bb, 6C, 6Ca, 6Cb, 6D, 6Da, 6Db Rod side terminal,

[0193] 7, 7A, 7Aa, 7Ab, 7B, 7Ba, 7Bb, 7C, 7D: Pole-side power supply lines.

[0194] 8. Microwave oscillator

[0195] 9. Microwave amplifier

[0196] 12. Cylindrical lid,

[0197] 13. The through hole of the puncture cannula.

[0198] 40 Gas supply pipe,

[0199] 50, 50A, 50B, 50C, 50D recess,

[0200] 70, 70A, 70B First-class wires

[0201] 70a One end of the first wire,

[0202] 70b The other end of the first wire,

[0203] 71, 71A, 71B Second Wire,

[0204] 71a One end of the second wire,

[0205] 71b The other end of the second wire,

[0206] J and N power receiving sections

Claims

1. A power supply device, comprising: The puncture cannula is made of insulating material and has a through hole; The puncture cannula side terminal is disposed on the inner surface of the through hole of the puncture cannula; A power supply line on the puncture cannula side connects the terminal on the puncture cannula side to the power supply; The instrument rod is capable of passing through the through hole; A power receiving part is provided on the instrument rod; A rod-side terminal is disposed on the outer surface of the instrument rod; A pole-side power supply line, disposed on the instrument pole, connects the power receiving part to the pole-side terminal; and A cylindrical cap made of a flexible, insulating material. By passing the instrument rod through the through hole of the puncture cannula, the terminal on the side of the puncture cannula can be brought into contact with the terminal on the side of the rod. With the puncture cannula-side terminal in contact with the rod-side terminal, power from the power source can be supplied to the receiving part through the puncture cannula-side power supply line, the puncture cannula-side terminal, the rod-side terminal, and the rod-side power supply line. The cylindrical cap is positioned such that the instrument rod passes through the inside of the cylindrical cap, and one end of the cylindrical cap is fixed to the outer surface of the instrument rod at a midpoint. The rod-side terminal is positioned closer to the front end of the instrument rod than the midpoint position. With the puncture cannula side terminal in contact with the rod side terminal, the other end of the cylindrical cap is in contact with one end of the puncture cannula, and the entire rod side terminal in contact with the puncture cannula side terminal is accommodated within the space formed by the inner side of the cylindrical cap and the through hole of the puncture cannula.

2. The power supply as claimed in claim 1, wherein, The power supply device also includes an air supply tube that connects to the puncture cannula. Gas flowing inside the gas delivery tube is introduced into the through hole and discharged from the opening at the other end of the puncture cannula.

3. The power supply as claimed in claim 1, wherein, With the puncture cannula side terminal in contact with the rod side terminal, the entire rod side terminal in contact with the puncture cannula side terminal is located inside the through hole.

4. The power supply as claimed in claim 1, wherein, A pair of puncture cannula-side terminals are provided, arranged opposite each other in the radial direction of the puncture cannula, as the puncture cannula-side terminals. A first puncture cannula-side power supply line is provided for connecting one of the puncture cannula-side terminals to a power source, and a second puncture cannula-side power supply line is provided for connecting the other puncture cannula-side terminal to a power source, serving as the puncture cannula-side power supply line. A pair of rod-side terminals are provided, arranged opposite each other in the radial direction of the instrument rod, as the rod-side terminals. The rod-side power supply line is provided for connecting one of the rod-side terminals to the power receiving part and for connecting the other rod-side terminal to the power receiving part. By inserting the pair of rod-side terminals into the through hole of the puncture cannula, making one of the pair of rod-side terminals contact one of the pair of puncture cannula-side terminals, and making the other of the pair of rod-side terminals contact the other of the pair of puncture cannula-side terminals, power from the power source can be supplied to the receiving part via the first puncture cannula-side power supply line and the second puncture cannula-side power supply line, the pair of puncture cannula-side terminals, the pair of rod-side terminals, and the first rod-side power supply line and the second rod-side power supply line.

5. The power supply as claimed in claim 4, wherein, In the circumferential direction of the puncture cannula, gaps are respectively provided between one end of the pair of puncture cannula side terminals and between the other ends of the pair of puncture cannula side terminals. The width of each of the pair of rod-side terminals is shorter than the width of the gap.

6. The power supply as claimed in claim 4, wherein, Multiple sets of the pair of rod-side terminals are spaced apart along the axial direction of the instrument rod. The pole-side power supply line is provided for connecting one of the pairs of pole-side terminals in each group to a power source, and for connecting the other of the pairs of pole-side terminals in each group to a power source. By inserting a set of the pair of rod-side terminals into the through hole of the puncture cannula, making one of the set of rod-side terminals contact one of the pair of puncture cannula-side terminals, and making the other of the set of rod-side terminals contact the other of the pair of puncture cannula-side terminals, power from the power source can be supplied to the receiving part via the first puncture cannula-side power supply line and the second puncture cannula-side power supply line, the pair of puncture cannula-side terminals, the set of the pair of rod-side terminals, and the first rod-side power supply line and the second rod-side power supply line.

7. The power supply as claimed in claim 6, wherein, With one of the set of rod-side terminals in contact with one of the pair of puncture cannula-side terminals, and the other of the set of rod-side terminals in contact with the other of the pair of puncture cannula-side terminals, the entire set of rod-side terminals is accommodated inside the through hole of the puncture cannula.

8. The power supply as claimed in claim 6, wherein, The spacing between two adjacent pairs of rod-side terminals along the axial direction of the instrument rod is equal to the length of the pair of puncture cannula-side terminals.

9. The power supply as claimed in claim 6, wherein, Each pair of rod-side terminals, in a state where they are each supported by a spring, are positioned in a recess formed on the outer surface of the instrument rod. The first pole-side power supply line passes through a recess configured with one of the pairs of pole-side terminals in each set, and the second pole-side power supply line passes through a recess configured with the other of the pairs of pole-side terminals in each set. With one of the pair of rod-side terminals pressed down and in contact with the first rod-side power supply line passing through the recess, and the other rod-side terminal pressed down and in contact with the second rod-side power supply line passing through the recess, power from the power source can be supplied to the receiving part via the first and second rod-side power supply lines, the pair of puncture cannula side terminals, the pair of rod-side terminals, the pair of rod-side terminals, and the first and second rod-side power supply lines by inserting the pair of rod-side terminals into the through hole of the puncture cannula, making one of the rod-side terminals in the pair in contact with one of the pair of puncture cannula side terminals, and making the other of the rod-side terminals in the pair of puncture cannula side terminals.

10. The power supply as claimed in claim 9, wherein, The first rod-side power supply line is composed of a plurality of first wires continuously arranged in the axial direction of the instrument rod, and the second rod-side power supply line is composed of a plurality of second wires continuously arranged in the axial direction of the instrument rod. For the first wire closest to the power receiving part among the plurality of first wires, one end of its power receiving part proximal to the power receiving part is connected to the power receiving part, and the other end of its power receiving part distal to the power receiving part extends into the recess closest to the power receiving part among the recesses where one of the pairs of rod-side terminals of each set is disposed. For the remaining first wires, one end of their power receiving part proximal to the power receiving part and the other end of their power receiving part distal to the power receiving part extend into the recesses that are adjacent in the axial direction of the instrument rod and are where one of the pairs of rod-side terminals of each set is disposed. The plurality of first wires are arranged in the recess with their respective other ends supported by springs. By pushing the rod-side terminal into the recess, the rod-side terminal can be brought into contact with the other end of the first wire arranged in the recess. The recesses extending from one end of the first wire on the distal side of the power receiving portion and the other end of the first wire on the proximal side of the power receiving portion, when the rod-side terminal is not pushed into the recesses, cause the other end of the first wire on the proximal side of the power receiving portion to be lifted by the spring force, thereby coming into contact with one end of the first wire on the distal side of the power receiving portion. When the rod-side terminal is pushed into the recesses, the rod-side terminal pushes the other end of the first wire on the proximal side of the power receiving portion, thereby causing the other end of the first wire on the proximal side of the power receiving portion to move away from one end of the first wire on the distal side of the power receiving portion. For the second wire closest to the power receiving part among the plurality of second wires, one end of its power receiving part proximal to the power receiving part is connected to the power receiving part, and the other end of its power receiving part distal to the power receiving part extends into the recess closest to the power receiving part among the recesses where the other rod-side terminal of each pair of rod-side terminals is disposed; for the remaining second wires, one end of its power receiving part proximal to the power receiving part and the other end of its power receiving part distal to the power receiving part respectively extend into the recesses that are adjacent in the axial direction of the instrument rod and are where the other rod-side terminal of each pair of rod-side terminals is disposed. The plurality of second wires are arranged in the recess with their respective other ends supported by springs. By pushing the rod-side terminal into the recess, the rod-side terminal can be brought into contact with the other end of the second wire arranged in the recess. The recess extending from one end of the second wire on the distal side of the power receiving part and the other end of the first wire on the proximal side of the power receiving part, when the rod-side terminal is not pushed into the recess, the other end of the second wire on the proximal side of the power receiving part is lifted by the spring force and comes into contact with one end of the second wire on the distal side of the power receiving part. When the rod-side terminal is pushed into the recess, the rod-side terminal pushes the other end of the second wire on the proximal side of the power receiving part, thereby causing the other end of the second wire on the proximal side of the power receiving part to move away from one end of the second wire on the distal side of the power receiving part.

11. The power supply as claimed in claim 1, wherein, The power source is either a DC power source or an AC power source. The power receiving unit outputs microwaves by being supplied with DC or AC power from the power source.

12. The power supply as claimed in claim 1, wherein, The power source is either a DC power source or an AC power source. The power receiving unit outputs high-frequency waves by being supplied with DC or AC power from the power source.

13. The power supply as claimed in claim 1, wherein, The power receiving unit includes at least a microwave oscillator and a microwave amplifier. The power source is a DC power source. The microwave oscillator uses the DC power supplied from the power source to the power receiving unit as a DC power source to generate microwaves, and the microwave amplifier uses the DC power supplied from the power source to the power receiving unit as a DC power source to amplify the microwaves.

14. The power supply as claimed in claim 1, wherein, The power receiving unit includes at least a converter, a microwave oscillator, and a microwave amplifier. The power source is an AC power source. The converter converts the AC power supplied from the power source to the power receiving unit into DC power. The microwave oscillator uses the DC power converted by the converter as a DC power source to generate microwaves. The microwave amplifier uses the DC power converted by the converter as a DC power source to amplify the microwaves.

15. The power supply as claimed in claim 13 or 14, wherein, The frequency of the microwave is 2.45GHz±50MHz, the power conversion efficiency of the microwave amplifier is 50% or higher, and the power supplied from the power source to the power receiving unit is 10W or more and 150W or less.

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