JP2015066079A - Ultrasonic treatment instrument and surgical operation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment instrument 20 which receives an AC magnetic field wirelessly and in which temperature increase is hard to occur.SOLUTION: A treatment instrument 20 includes: a grip part 24; an ultrasonic vibrator 23; a horn 22 whose base end part is mechanically coupled with the ultrasonic vibrator 23 and which consists of rod-like metal; a treatment part 21 which is inserted into a body of a subject 9 via an insertion hole 19H of a trocar 10 having a power transmission coil 19 generating an AC magnetic field and which is mechanically coupled with the tip of the horn 22; and a solenoid-shaped power receiving coil 29 which wirelessly receives power with inductive coupling with the power transmission coil 19 and arranged closer to the grip part side than the ultrasonic vibrator 23.

Description

  The present invention relates to an ultrasonic treatment device that wirelessly receives electric power via an alternating magnetic field, and a surgical system including the ultrasonic treatment device.

  Endoscopic surgery is widely performed because it is minimally invasive. For example, a surgical operation system 101 shown in FIG. 1 is disclosed in Japanese Patent Laid-Open No. 2009-195676. The surgical system 101 includes a treatment instrument 120 that is inserted into the abdominal cavity through the insertion hole 110H of the trocar 110 punctured on the body wall of the subject 9.

  The treatment tool 120 is an ultrasonic treatment tool, and includes a vibration transmission member 122 that transmits vibration generated by the ultrasonic vibrator 123 joined to the back mass 123A to the treatment portion 121 at the tip. Further, the joint portion of the vibration transmitting portion 122 with the ultrasonic vibrator 123 is a horn portion 122A for expanding vibration. The treatment unit 121 holds the affected part to be treated with the grasping member 124A that is opened and closed by operating the grasping part 124 grasped by the surgeon.

  A cable 135 for supplying power from the power supply unit 130 to the ultrasonic transducer is connected to the treatment instrument 120. However, the cable 135 interferes with the surgeon's operation and reduces operability.

  Japanese Patent Application Laid-Open No. 11-128242 discloses a system that generates an AC magnetic field from a power transmission coil of a trocar and wirelessly supplies power to a power reception coil of a treatment instrument inserted in the trocar.

  However, in a surgical system that wirelessly transmits power using an alternating magnetic field, the conductor disposed inside the treatment tool is induction-heated by the alternating magnetic field. For example, the horn of an ultrasonic treatment instrument is heated because it is made of a high-strength metal, and the operation of the ultrasonic treatment device or the treatment unit increases due to the temperature increase or the power transmission efficiency decreases. There was a risk of becoming.

JP 2009-195676 A Japanese Patent Laid-Open No. 11-128242

  An embodiment of the present invention aims to provide an ultrasonic treatment instrument with stable operation that wirelessly receives an alternating magnetic field and a surgical system with stable operation that wirelessly receives an alternating magnetic field.

  An ultrasonic treatment instrument according to an embodiment of the present invention includes a gripping portion, an ultrasonic transducer, a vibration transmission member made of a rod-like metal in which the ultrasonic transducer and a base end portion are mechanically coupled, and an alternating current A treatment portion that is inserted into the body of the subject through the insertion hole of the trocar having a power transmission coil that generates a magnetic field and mechanically coupled to the distal end portion of the vibration transmission member, and the power transmission coil and inductive coupling And a solenoid-shaped power receiving coil disposed on the grip portion side of the ultrasonic transducer for wirelessly receiving power.

  In another embodiment, a surgical system includes a trocar having a power transmission coil that generates a solenoid-shaped AC magnetic field wound around an insertion hole, a gripper, an ultrasonic transducer, and the ultrasonic transducer and a base. A vibration transmission member made of a rod-like metal whose ends are mechanically coupled, a treatment portion mechanically coupled to the tip of the vibration transmission member, and the power transmission coil are inductively coupled to wirelessly transmit power. A treatment tool inserted into the insertion hole, and a power supply unit that outputs driving power to the power transmission coil. And.

  According to the embodiments of the present invention, it is possible to provide an ultrasonic treatment instrument with a stable operation that wirelessly receives an alternating magnetic field and a surgical system with a stable operation that wirelessly receives an alternating magnetic field.

It is a schematic diagram of the conventional surgery system. It is a mimetic diagram of the operation system of an embodiment. It is sectional drawing of the principal part of the surgery system of embodiment. It is sectional drawing of the principal part of the surgery system of embodiment. It is a block diagram for demonstrating the electric power supply of the surgery system of 2nd Embodiment.

<First Embodiment>
First, the surgical operation system 1 and the ultrasonic treatment instrument (hereinafter also referred to as “treatment instrument”) 20 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 2, the surgical operation system 1 includes a trocar 10, a power unit 30, and a treatment tool 20. The surgical treatment tool 20 is inserted into the body of the subject 9, for example, into the abdominal cavity, through the insertion hole 10H of the trocar 10 punctured on the body wall of the subject 9. In the surgical system 1, an endoscope or the like is also inserted into the body of the subject 9 via another trocar, but the description thereof is omitted.

  The power supply unit 30 outputs a high-frequency, high-frequency driving power of 10 W to 100 W, for example. The trocar 10 has a solenoid-shaped power transmission coil 19 wound around the insertion hole 10H. The power transmission coil 19 generates an alternating magnetic field when driving power is supplied from the power supply unit 30.

  The treatment instrument 20 is an ultrasonic treatment instrument including a grasping portion 24, an ultrasonic transducer 23, a horn 22 that is a vibration transmission member, a treatment portion 21, and a power receiving coil 29. The treatment tool 20 is inserted into the body of the subject 9 through the insertion hole 10H of the trocar 10.

  The operator grasps and operates the grasping portion 24. The ultrasonic transducer 23 made of a laminated piezoelectric element vibrates ultrasonically when drive power is applied. The base end portion of the ultrasonic transducer 23 is mechanically coupled to a back mass 23A made of metal.

  The horn 22 has a rod shape and transmits the vibration of the ultrasonic transducer 23 to the treatment unit 21. That is, the horn 22 has a proximal end portion mechanically coupled to the ultrasonic transducer 23 and a distal end portion mechanically coupled to the treatment portion 21. The horn 22 is made of a high-strength metal such as a titanium alloy such as 64 titanium alloy or pure titanium in order to efficiently transmit vibration.

  The treatment section 21 includes a vibration section that vibrates ultrasonically and a holding section that is paired with the vibration section. The ultrasonic vibration is applied to the affected area to be treated, which is sandwiched between the vibration section and the holding section by the operation of the gripping section 24, and the treatment is performed.

  As shown in FIG. 3, the power receiving coil 29 has a solenoid shape, and the long axis direction is the longitudinal direction of the treatment instrument 20. As shown in FIG. 4, when the treatment instrument 20 is inserted into the trocar 10, the power receiving coil 29 is inserted concentrically into the power transmitting coil 19 and is inductively coupled.

  The power transmission coil 19 constitutes a power transmission side LC series resonance circuit including a power transmission circuit (not shown) having a power transmission capacitor, and generates an AC magnetic field having a predetermined resonance frequency FR1. The power receiving coil 29 constitutes a power receiving side LC series resonance circuit including a power receiving circuit (not shown) having a power receiving capacitor, and efficiently receives an AC magnetic field having a predetermined resonance frequency FR2.

  The resonance frequency FR1 of the power transmission side LC series resonance circuit and the resonance frequency FR2 of the power reception side LC series resonance circuit are substantially the same. In the surgical system 1, wireless power transmission / reception is efficiently performed by the magnetic field resonance phenomenon. . Note that the resonance frequencies FR1 and FR2 are appropriately selected within a range of 10 kHz to 20 MHz, for example.

  In the surgical system 1, the cable 35 from the power supply unit 30 is connected to the trocar 10. Since the ultrasonic transducer 23 is driven by the power received wirelessly by the power receiving coil 29, the treatment instrument 20 does not require a power supply cable and has good operability.

  In the treatment instrument 20, the power receiving coil 29 is disposed closer to the grip portion (base end portion) than the ultrasonic transducer 23. In other words, the ultrasonic transducer 23 having a small diameter is disposed at a portion of the treatment instrument 20 to be inserted into the subject 9.

  Although the ultrasonic transducer 23 has a small diameter, it is easy to increase the length, that is, the number of stacked piezoelectric elements, and the length of the horn 22 can be shortened. The ultrasonic waves having the intensity required for the treatment are transmitted to 21.

  For this reason, as shown in FIG. 4, even if the treatment instrument 20 is inserted into the trocar 10 and the power receiving coil 29 is in a state of receiving an AC magnetic field generated by the power transmitting coil 19 (inductive coupling state), the AC magnetic field is 22 and the back mass 23A are hardly applied. Although the horn 22 and the back mass 23A are made of a conductor, they are not induction-heated by an AC magnetic field, so that there is no possibility that the temperature of the ultrasonic transducer 23 or the treatment unit 21 will rise. Moreover, the surgical system 1 does not have a possibility that the transmission efficiency of electric power will fall. For this reason, operation of the treatment tool 20 and the surgical system 1 is stable.

Second Embodiment
Next, the surgery system 1A of the second embodiment will be described. Since the surgical system 1A is similar to the surgical system 1 and the like, the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, the power receiving coil 19 </ b> A of the trocar 10 </ b> A of the surgical system 1 </ b> A has three coils 19 </ b> A <b> 1, 19 </ b> A <b> 2, 19 </ b> A <b> 3 that can be separately applied with current. Then, under the control of the switching unit (SW) 31, drive power is output to the coil that is dielectrically coupled to the power receiving coil 29 among the three coils 19 </ b> A to 19 </ b> A <b> 3.

  That is, the switching unit 31 includes a switch unit, a detection unit, and a switching control unit (not shown). The switch unit switches to which coil the current is applied. The detection unit is a detection circuit that detects a coil inductively coupled to the power receiving coil 29. A switching control unit including a CPU or the like controls the switch unit according to the detection result of the detection unit.

  When driving power is applied to the cables 35A and 35B, the coil 19A1 generates an alternating magnetic field. When driving power is applied to the cables 35B and 35C, the coil 19A2 generates an alternating magnetic field. When driving power is applied to the cables 35C and 35D, the coil 19A3 generates an alternating magnetic field.

  The switching unit 31 applies detection power smaller than the driving power to each coil before outputting the driving power. The detected power is set to such an extent that the magnetic field generated by the applied coil does not cause problems such as heat generation of the horn 22.

  When the power transmission coils 19 </ b> A to 19 </ b> A <b> 3 are inductively coupled to the power reception coil 29, for example, the reflected wave intensity with respect to the detected power decreases. For this reason, the detection unit of the switching unit 31 can detect the power transmission coil inductively coupled to the power reception coil 29.

  The surgical system 1A has the effect of the surgical system 1 and outputs driving power only to the power transmission coil inductively coupled to the power receiving coil 29, so that higher transmission efficiency can be obtained.

  Further, since a large energy acts on the affected area, there is no possibility that an alternating magnetic field is applied to the back mass 23A or the like even when the ultrasonic transducer 23 including the back mass 23A is long. Further, even when the power receiving coil 29 is short, electromagnetic field leakage to the outside of the trocar 10 can be reduced.

  In the present embodiment, the power transmission coil 19 is divided into three parts, but it may be divided into two parts or more than four parts. In addition, when a plurality of coils, for example, two of the three coils 19A1 and 19A2 are inductively coupled to the power receiving coil 29, the switching unit 31 supplies driving power to the two coils 19A1 and 19A2. It may be output.

  The present invention is not limited to the above-described embodiments, and various modifications, combinations, and applications are possible without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1, 1A ... Surgical system 10, 10A ... Trocar 19 ... Power transmission coil 20 ... Treatment tool 21 ... Treatment part 22 ... Horn 23 ... Ultrasonic transducer 24 ... Grasping part 29 ... Receiving coil 30 ... Power supply unit 31 ... Switching part

Claims (4)

A gripping part;
An ultrasonic transducer,
A vibration transmission member made of a rod-shaped metal in which the ultrasonic vibrator and a base end portion are mechanically coupled;
A treatment portion mechanically coupled to the distal end portion of the vibration transmitting member, which is inserted into the body of the subject through an insertion hole of a trocar having a power transmission coil that generates an alternating magnetic field;
A treatment instrument comprising: a solenoid-shaped power receiving coil that is inductively coupled to the power transmitting coil and wirelessly receives power, and is disposed closer to the grip portion than the ultrasonic transducer. A trocar having a power transmission coil that generates a solenoid-shaped AC magnetic field wound around the insertion hole;
A gripping part, an ultrasonic vibrator, a vibration transmission member made of a rod-like metal in which the ultrasonic vibrator and a base end part are mechanically coupled, and a tip part of the vibration transmission member are mechanically coupled. Inserted into the insertion hole having a treatment portion that is inductively coupled with the power transmission coil to receive power wirelessly and that is disposed on the gripping portion side of the ultrasonic transducer. With treatment tool,
And a power supply unit that outputs driving power to the power transmission coil. The power transmission coil, a plurality of coils to which current is applied separately are connected in the longitudinal direction,
The surgical power system according to claim 2, wherein the power supply unit includes a switching unit that outputs drive power to a coil that is dielectrically coupled to the power receiving coil among the plurality of coils.   The surgical operation system according to claim 3, wherein the power supply unit detects a coil inductively coupled to the power receiving coil by applying a detection power smaller than the driving power to each of the plurality of coils. .

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