WO2016093086A1 - Dispositif de traitement - Google Patents

Dispositif de traitement Download PDF

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Publication number
WO2016093086A1
WO2016093086A1 PCT/JP2015/083418 JP2015083418W WO2016093086A1 WO 2016093086 A1 WO2016093086 A1 WO 2016093086A1 JP 2015083418 W JP2015083418 W JP 2015083418W WO 2016093086 A1 WO2016093086 A1 WO 2016093086A1
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Prior art keywords
temperature
heat
heat generating
period
generating member
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PCT/JP2015/083418
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English (en)
Japanese (ja)
Inventor
敏文 桂木
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オリンパス株式会社
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Priority to JP2016540718A priority Critical patent/JPWO2016093086A1/ja
Publication of WO2016093086A1 publication Critical patent/WO2016093086A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating

Definitions

  • the present invention relates to a treatment apparatus.
  • Japanese Patent Application Laid-Open No. 2012-125338 discloses a technique relating to a treatment apparatus that can apply a high-frequency voltage to a grasped living tissue, further heat the tissue, and finally cut the living tissue with a cutter.
  • a heating chip that functions as a heater for heating the electrode is provided on the electrode that functions as a heat transfer member that comes into contact with the living tissue.
  • an offset value corresponding to the amount of power supplied to the heat generating chip is calculated in consideration of the temperature difference between the electrode and the heat generating chip.
  • This treatment apparatus maintains the temperature of the heat generating chip at a control target temperature obtained by adding an offset value to the target temperature of the electrode.
  • a variable voltage source is mainly used.
  • Japanese Patent Application Laid-Open No. 2012-024583 also discloses a technique related to an apparatus for heat-treating a living tissue.
  • a variable voltage source is used, and the temperature of the heater is kept constant by adjusting the output voltage.
  • the circuit configuration of the constant voltage source is simpler than that of the variable voltage source.
  • An object of the present invention is to provide a treatment apparatus using a constant voltage source for heating a living tissue, and capable of heating the living tissue to be treated at a predetermined target temperature.
  • a treatment apparatus is a treatment apparatus for treating a biological tissue by heating it at a predetermined target temperature, wherein the treatment apparatus is in contact with the biological tissue and transfers heat to the biological tissue.
  • a drive circuit that supplies a voltage and does not supply a constant voltage of the first voltage value to the heat generating member when it is off, and a length of an on period that is a period in which the past drive circuit is on or
  • An offset value calculation unit that calculates an offset value according to a temperature difference between the heat transfer member and the heat generation member based on a length of an off period that is a period during which the drive circuit is off; and To the corrected target temperature with the offset value added
  • An output setting unit that sets the on or off of the drive circuit to maintain the temperature of the thermal member, and controls the operation of the drive circuit based on the on or off set by the output setting unit A drive control unit.
  • the treatment device is a treatment device for heating and treating a living tissue at a predetermined target temperature, and contacts the living tissue and transfers heat to the living tissue.
  • a drive circuit that supplies a constant voltage and does not supply a constant voltage having a first voltage value to the heat generating member during the off period, and the heat transfer member and the heat generating element based on a temperature drop of the heat generating member during the off period.
  • An offset value calculation unit that calculates an offset value according to a temperature difference with the member, and a length of the on period in the future so as to maintain the heating member at a corrected target temperature obtained by adding the offset value to the target temperature. Or the length of the off-period And an output setting section for constant, based on the length of the length or the OFF period of the ON period of the output setting unit has set, a drive control unit for controlling the drive circuit.
  • a treatment apparatus that can heat a biological tissue to be treated at a predetermined target temperature in a treatment apparatus that uses a constant voltage source for heat treatment of the biological tissue.
  • FIG. 1 is a diagram illustrating an outline of an example of an appearance of a treatment apparatus according to the first embodiment.
  • FIG. 2 is a diagram schematically illustrating a configuration example of the treatment apparatus according to the first embodiment.
  • FIG. 3 is a diagram illustrating an outline of a configuration example of the heat transfer member and the heater of the treatment apparatus according to the first embodiment.
  • FIG. 4 is a diagram for explaining heat transfer between the heat transfer member and the heater.
  • FIG. 5 is a flowchart illustrating an example of processing according to the first embodiment.
  • FIG. 6 is a diagram for explaining the operation of the treatment apparatus according to the first embodiment.
  • FIG. 7 is a flowchart illustrating an example of processing according to the second embodiment.
  • FIG. 8 is a diagram for explaining the operation of the treatment apparatus according to the second embodiment.
  • FIG. 9 is a diagram for explaining the operation of the treatment apparatus according to the third embodiment.
  • FIG. 1 A schematic view of the appearance of a medical treatment apparatus 1 according to this embodiment is shown in FIG.
  • the treatment device 1 is a device for use in the treatment of living tissue, and is used for, for example, treatments for cutting, incising, sealing, or anastomosing blood vessels or intestinal tracts.
  • the treatment apparatus 1 performs treatment by applying thermal energy to living tissue.
  • the treatment device 1 includes a treatment tool 100 and a control device 200.
  • the treatment tool 100 is a linear type surgical treatment tool for performing treatment by, for example, penetrating the abdominal wall.
  • the treatment instrument 100 includes a handle 160, a shaft 150 attached to the handle 160, and a grip 110 provided at the tip of the shaft 150.
  • the grasping unit 110 can be opened and closed, and is a treatment unit that grasps a living tissue to be treated and performs a treatment such as coagulation or incision of the living tissue.
  • the grip 110 side is referred to as the distal end side
  • the handle 160 side is referred to as the proximal end side.
  • the handle 160 includes a plurality of operation knobs 164 for operating the grip portion 110.
  • the shape of the treatment tool 100 shown here is only an example, and other shapes may be used as long as they have the same function.
  • the shaft may be curved.
  • the technology according to the present embodiment is not limited to the treatment apparatus used in the rigid endoscope operation as shown in FIG. 1 but is also applied to the treatment apparatus used in the endoscopic operation using the flexible endoscope. obtain.
  • the treatment instrument 100 is connected to the control device 200 via a cable 190.
  • the cable 190 and the control device 200 are connected by a connector 195, and this connection is detachable. That is, the treatment apparatus 1 is configured so that the treatment tool 100 can be replaced for each treatment.
  • a foot switch 290 is connected to the control device 200.
  • the foot switch 290 operated with a foot may be replaced with a switch operated with a hand, for example, a hand switch or another switch.
  • a hand switch or another switch When the operator operates the pedal of the foot switch 290, the supply of energy from the control device 200 to the treatment instrument 100 is switched on / off.
  • the grasping part 110 of the treatment instrument 100 includes a first grasping member 112 and a second grasping member 114.
  • the holding unit 110 is opened and closed.
  • the grasping unit 110 is configured to grasp a biological tissue that is a treatment target between the first grasping member 112 and the second grasping member 114.
  • the first gripping member 112 and the second gripping member 114 have the same configuration. That is, each of the first holding member 112 and the second holding member 114 has a heat transfer member 122.
  • the heat transfer member 122 is made of a metal having high thermal conductivity such as copper.
  • the heat transfer member 122 of the first holding member 112 and the heat transfer member 122 of the second holding member 114 are provided so as to face each other. That is, each heat transfer member 122 is provided so as to contact the living tissue.
  • Each of the heat transfer members 122 is provided with a heater 124.
  • the heater 124 has a structure in which a heat generating member 128 is provided on a substrate 126.
  • the substrate 126 is, for example, a polyimide substrate.
  • the heating member 128 is, for example, a stainless (SUS) resistance pattern formed on the substrate 126.
  • the heater 124 is disposed so that the substrate 126 is in contact with the heat generating member 128.
  • the heat generating member 128 When power is supplied to the heat generating member 128, the heat generating member 128 generates heat. Heat generated by the heat generating member 128 is transmitted to the heat transfer member 122 via the substrate 126. This heat is transmitted to the living tissue in contact with the heat transfer member 122, and the living tissue is heated.
  • the control device 200 includes a control unit 210, a storage unit 220, a drive circuit 230, an input unit 240, and a display unit 250.
  • the control device 200 controls the heating operation of the treatment instrument 100 using a pulse width modulation (PWM) method.
  • PWM pulse width modulation
  • the control unit 210 plays a central role in the control device 200.
  • the control unit 210 is connected to each unit of the control device 200.
  • the storage unit 220 stores various information used for the processing of the control unit 210.
  • the storage unit 220 stores a program for processing performed by the control unit 210.
  • the drive circuit 230 is a drive circuit for driving the heater 124.
  • the drive circuit 230 and the heater 124 are connected by a conducting wire 132.
  • the drive circuit 230 applies a voltage across the heat generating member 128 of the heater 124. Since PWM control is employed, the drive circuit 230 is configured to output a constant voltage.
  • the drive circuit 230 may not have a variable voltage value.
  • the input unit 240 is a part that receives user instructions.
  • the input unit 240 includes any one of general input devices such as a button switch, a slider, a dial, a keyboard, and a touch panel.
  • the display unit 250 is a part that displays various types of information related to the control device 200.
  • the display unit 250 includes any one of general display devices such as a liquid crystal display and a display panel using LEDs.
  • the control unit 210 includes a temperature calculation unit 211, an offset value calculation unit 212, an output setting unit 213, and a drive control unit 214.
  • the temperature calculation unit 211 calculates the temperature of the heat generating member 128.
  • the electrical resistance value of the heat generating member 128 changes according to the temperature. Therefore, the temperature calculation unit 211 calculates the temperature of the heat generating member 128 based on the electrical resistance value of the heat generating member 128. For this reason, the temperature calculation unit 211 calculates the resistance value of the heat generating member 128 based on the voltage applied to the heat generating member 128 and the current flowing through the heat generating member 128.
  • the storage unit 220 records the relationship between the resistance value and the temperature of the heat generating member 128, and the temperature calculating unit 211 refers to this relationship to acquire the temperature of the heat generating member 128.
  • the offset value calculation unit 212 calculates the offset value ⁇ T based on the past output from the drive circuit 230.
  • the offset value ⁇ T is a value corresponding to the temperature difference between the heat transfer member 122 and the heat generating member 128.
  • the offset value calculation unit 212 determines the offset value based on the length of the on period that is a period during which the driving circuit 230 is on and / or the length of the off period that is a period during which the driving circuit 230 is off. ⁇ T is calculated.
  • the output setting unit 213 sets the operation of the drive circuit 230 to maintain the temperature of the heat generating member 128 at the corrected target temperature obtained by adding the offset value ⁇ T to the target temperature of the heat transfer member 122.
  • the drive control unit 214 controls the operation of the drive circuit 230 based on the setting of the output setting unit 213.
  • the control unit 210 includes a central processing unit (CPU) or an application specific integrated circuit (ASIC) and performs various calculations.
  • An ASIC or the like may be formed for each element included in the control unit 210 such as the temperature calculation unit 211 or the like.
  • the substrate 126 of the heater 124 is slightly smaller than the heat transfer member 122 and has the same shape as the heat transfer member 122.
  • the heat generating member 128 formed on the substrate 126 has both ends provided on the base end side, and has a generally U-shaped pattern. This pattern is formed in a wave shape so as to cover a wide area of the substrate while reducing the line width in order to increase the electrical resistance value.
  • One end of a conducting wire 132 is connected to each end of the heat generating member 128. The other end of the conducting wire 132 is electrically connected to the drive circuit 230.
  • FIG. 4 The heat conduction between the heat transfer member 122 and the heater 124 will be described with reference to FIG.
  • the left side shows the positional relationship among the heat transfer member 122, the substrate 126, and the heat generating member 128.
  • the right side of FIG. 4 shows the relationship between position and temperature.
  • the upper side shows a case where the temperature of the heat generating member 128 is low
  • the lower side shows a case where the temperature of the heat generating member 128 is high.
  • the width of the arrow on the left side of FIG. 4 schematically shows the amount of heat that moves.
  • the greater the amount of heat that moves the greater the temperature difference between the heat generating member 128 and the heat transfer member 122. That is, as the amount of heat applied to the heat transfer member 122 is larger, the temperature of the heat generating member 128 needs to be set higher than the temperature of the heat transfer member 122.
  • the surgeon first operates the input unit 240 of the control device 200 to set the output conditions of the treatment device 1 such as the target temperature and heating time related to the treatment.
  • the value of each parameter may be set individually, or a set of setting values according to the technique may be selected.
  • the grasping part 110 and the shaft 150 of the treatment tool 100 are inserted into the abdominal cavity through the abdominal wall, for example.
  • the surgeon operates the operation knob 164 to open and close the grasping unit 110 and grasps the living tissue to be treated by the first grasping member 112 and the second grasping member 114.
  • the living tissue to be treated comes into contact with the heat transfer member 122 provided on the first holding member 112 and the second holding member 114.
  • the surgeon operates the foot switch 290 after grasping the living tissue to be treated by the grasping unit 110.
  • the foot switch 290 When the foot switch 290 is turned on, electric power is supplied from the control device 200 to the heater 124 via the conductive wire 132 passing through the cable 190.
  • the target temperature is 200 ° C., for example.
  • the current flows through the heat generating member 128.
  • the heat generating member 128 generates heat by this current.
  • the heat generated by the heat generating member 128 is transferred to the heat transfer member 122 through the substrate 126. As a result, the temperature of the heat transfer member 122 rises.
  • the living tissue in contact with the heat transfer member 122 is cauterized and solidified by the heat transferred to the heat transfer member 122.
  • the supply of power to the heater 124 is stopped. The treatment of the living tissue is thus completed.
  • Control by the control unit 210 will be described with reference to the flowchart shown in FIG.
  • the control of the control unit 210 starts, for example, when the power of the control device 200 is turned on.
  • step S101 the control unit 210 sets treatment conditions such as a target temperature and a treatment time based on an input to the input unit 240 by the user.
  • the target temperature of the biological tissue to be treated is assumed to be T_target1.
  • step S102 the control unit 210 determines whether an instruction to start heating is input.
  • An instruction to start heating is input, for example, when the foot switch 290 is stepped on.
  • the process returns to step S102. That is, the control unit 210 stands by until an instruction to start heating is input.
  • the process proceeds to step S103.
  • step S103 the control unit 210 sets the pulse width W of the pulse output from the drive circuit 230 in the control by the PWM method to an initial value.
  • the initial value of the pulse width W is, for example, half the output period.
  • the initial value of the pulse width W is not limited to this, and may be any value.
  • step S104 the controller 210 causes the drive circuit 230 to output the pulse having the pulse width W set in step S103. As a result, a current flows through the heat generating member 128 and the heat generating member 128 generates heat.
  • the output voltage of the drive circuit 230 is a predetermined value.
  • the controller 210 calculates the temperature of the heat generating member. More specifically, the controller 210 calculates the resistance value of the heat generating member 128 based on the current that flows during pulse output and a predetermined output voltage value. The controller 210 calculates the temperature of the heat generating member 128 based on the resistance value of the heat generating member 128.
  • the temperature of the heat generating member 128 is derived, for example, by referring to a table including the relationship between the resistance value and the temperature of the heat generating member 128 stored in the storage unit 220. The temperature may be calculated using an expression representing the relationship between the resistance value of the heat generating member 128 and the temperature instead of the table.
  • step S106 the control unit 210 calculates the target temperature offset value ⁇ T based on the pulse width W of the pulse output immediately before, that is, the value related to the duty ratio.
  • C1 and C2 are predetermined constants.
  • the offset value ⁇ T is not limited to the above equation (1), and may be calculated using, for example, a quadratic equation, a high-order equation, or other equations.
  • the controller 210 determines the pulse width W of the next pulse to be output so that the temperature of the heat generating member 128 becomes the corrected target temperature T_target2.
  • W calculated using Expression (3) is larger than the maximum pulse width W_max determined based on the period of the output pulse, the pulse width W is set to the maximum pulse width W_max. Note that the maximum pulse width is, for example, about several hundred milliseconds.
  • step S108 the control unit 210 causes the drive circuit 230 to output the pulse having the pulse width W determined in step S108.
  • the control unit 210 determines whether or not the treatment is completed.
  • the condition for completing the treatment can be set to any one of the following or others, for example.
  • the treatment may be completed when the output time passes a preset treatment time.
  • the treatment may be completed when the temperature of the living tissue, that is, the temperature of the heat transfer member 122 reaches a predetermined temperature and becomes stable.
  • the treatment may be completed when a predetermined time elapses after the temperature of the living tissue reaches a predetermined temperature.
  • step S109 when the treatment is not completed, the process returns to step S105. On the other hand, when the treatment is completed, the process proceeds to step S110.
  • step S110 the control unit 210 causes the drive circuit 230 to stop outputting. Thereafter, the process ends.
  • the operation of the treatment apparatus 1 will be described with reference to FIG.
  • the elapsed time is shown on the horizontal axis.
  • the intervals between the plurality of broken lines extending vertically represent the period of the output pulse.
  • the first graph from the top in FIG. 6 shows the pulse output with respect to the elapsed time. That is, this figure switches between an ON state in which a voltage is applied to the heating member 128 in one cycle and an OFF state in which no voltage is applied to the heating member 128, that is, the voltage value is zero. It is shown that.
  • the shaded portion indicates that the pulse width W is increased as a result of considering the offset value ⁇ T. Therefore, if the control is performed so that the temperature of the heat generating member 128 becomes the target temperature T_target1 without using the corrected target temperature T_target2 in consideration of the offset value ⁇ T, the pulse width W is shortened by the shaded area. Become.
  • the second graph from the top in FIG. 6 shows the offset value ⁇ T with respect to the elapsed time.
  • the offset value ⁇ T depends on the pulse width W of the pulse output immediately before.
  • the third graph from the top in FIG. 6 shows the temperature of the living tissue with respect to the elapsed time, that is, the temperature of the heat transfer member 122 by a solid line.
  • the broken line extending horizontally indicates the target temperature T_target1.
  • the alternate long and short dash line indicates the temperature of the living tissue when control is performed so that the temperature of the heat generating member 128 becomes the target temperature T_target1 without using the corrected target temperature T_target2 in consideration of the offset value ⁇ T. Indicates. Thus, if the offset value ⁇ T is not considered, the temperature of the living tissue is lower than the target temperature T_target1.
  • the fourth graph from the top in FIG. 6 shows the temperature of the heat generating member 128 with respect to the elapsed time by a solid line.
  • the broken line extending horizontally indicates the target temperature T_target1.
  • the alternate long and short dash line of the heat generating member 128 when the control is performed so that the temperature of the heat generating member 128 becomes the target temperature T_target1 without using the corrected target temperature T_target2 in consideration of the offset value ⁇ T. Indicates temperature.
  • the temperature of the heat generating member 128 is controlled to be the target temperature T_target1.
  • the offset value ⁇ T is taken into consideration, so that the temperature of the living tissue that is the treatment target is appropriately controlled to be the target temperature T_target1.
  • the output voltage is constant.
  • the circuit configuration of the drive circuit 230 which is an output circuit, is simpler than when the output voltage is variable.
  • the expression using the pulse width W is shown. However, the expression can be similarly expressed even when using a duty ratio or a period in which the output is off.
  • the offset value ⁇ T is determined based on the pulse width W, the duty ratio, etc. of each cycle. However, the present invention is not limited to this, and the offset value ⁇ T may be determined based on outputs of a plurality of past cycles such as a sum of pulse widths for a plurality of cycles and an average duty ratio.
  • the temperature of the heat generating member 128 is acquired based on the electric resistance value of the heat generating member 128.
  • the present invention is not limited to this, and the temperature of the heat generating member 128 may be acquired by other methods.
  • a temperature sensor may be provided on the heat generating member 128.
  • the temperature of the heat generating member 128 is acquired based on the electric resistance value of the heat generating member 128, it is not necessary to provide other elements such as a temperature sensor, and the structure of the grip portion 110 is simplified and downsized.
  • both the first gripping member 112 and the second gripping member 114 include the heat transfer member 122 and the heater 124 is shown, but the present invention is not limited thereto. That is, the heat transfer member 122 and the heater 124 may be provided on only one of the first gripping member 112 and the second gripping member 114.
  • control using PWM is performed.
  • on / off control is performed in which the output is turned on when the current temperature is lower than the target temperature, and the output is turned off when the current temperature is higher than the target temperature.
  • the output voltage is constant at a predetermined value.
  • the offset value ⁇ T is determined according to the period during which the output is on within a predetermined period. This is because the heat flux from the heat generating member 128 to the heat transfer member 122 increases as the period during which the output is on within the predetermined period, and the temperature difference between the heat generating member 128 and the heat transfer member 122 increases. Because.
  • Control by the control unit 210 according to the present embodiment will be described with reference to a flowchart shown in FIG.
  • step S201 the control unit 210 sets treatment conditions such as a target temperature and a treatment time based on an input to the input unit 240 by the user.
  • T_target1 be the target temperature of the living tissue to be treated.
  • the initial value of the target temperature T_target3 of the heat generating member 128 is also set to the target temperature T_target1 of the living tissue, for example.
  • step S202 the control unit 210 determines whether an instruction to start heating is input. When the instruction to start heating is not input, the process returns to step S202. When an instruction to start heating is input, the process proceeds to step S203. In step S203, the control unit 210 sets the output to ON, and causes the drive circuit 230 to output a predetermined voltage.
  • step S204 the control unit 210 calculates the electrical resistance value of the heat generating member 128 based on the voltage value and the current value supplied to the heat generating member 128, and obtains the temperature of the heat generating member 128.
  • step S205 the controller 210 determines whether or not the temperature of the heat generating member 128 is lower than the target temperature. When the temperature of the heat generating member 128 is lower than the target temperature, the process proceeds to step S206. In step S206, the control unit 210 sets the output to ON, and causes the drive circuit 230 to output a predetermined voltage. Thereafter, the process proceeds to step S210.
  • step S205 when the temperature of the heat generating member 128 is not lower than the target temperature, the process proceeds to step S207.
  • step S207 the control unit 210 sets the output to OFF and does not cause the drive circuit 230 to output a predetermined voltage.
  • step S208 the control unit 210 determines whether or not the period during which the output is off is longer than the predetermined period. When the off period is not longer than the predetermined period, the process returns to step S208. On the other hand, when the off period is longer than the predetermined period, the process proceeds to step S209.
  • step S209 the control unit 210 turns on the output. That is, after the output is turned off in step S207, the state where the output is off for a predetermined period is continued, and then the output is turned on.
  • the reason why the output is turned on when the predetermined period has elapsed is that since the resistance value of the heat generating member 128 cannot be calculated unless the output is turned on, the temperature of the heat generating member 128 cannot be acquired.
  • step S212 the control unit 210 determines whether or not the treatment is completed. When the treatment is not completed, the process returns to step S204. On the other hand, when the treatment is completed, the process proceeds to step S213. In step S213, the control unit 210 causes the drive circuit 230 to stop outputting. Thereafter, the process ends.
  • FIG. 8 shows a relationship among the output state, the offset value ⁇ T, the temperature of the living tissue, and the temperature of the heat generating member 128 with respect to the elapsed time in the case of the present embodiment.
  • a period from when the output is turned off to when it is turned on is schematically illustrated as a period of three cycles.
  • a case where the predetermined period P_1 used for calculating ⁇ T is set to a period of five cycles is schematically shown. These periods may be any period.
  • the offset value ⁇ T is taken into consideration, so that the temperature of the living tissue that is the treatment target can be appropriately controlled so as to become the initially set target temperature T_target1.
  • the amount of calculation is small because it is determined whether the output is turned on or off depending on whether the current temperature is lower than the target temperature.
  • the circuit configuration of the drive circuit 230 that is an output circuit may be simple.
  • the temperature of the heat generating member 128 cannot be acquired when the output is turned off. For this reason, the temperature of the heat generating member 128 may be excessively lowered during the period in which the output is off, or the output may be turned on even though the temperature of the heat generating member 128 is higher than the target temperature.
  • the power supply to the heat generating member 128 is not completely stopped, but a minute voltage is applied to the heat generating member 128 to always acquire the temperature of the heat generating member 128.
  • the minute voltage is a voltage that is so small that the heat generated by the heat generating member 128 can be ignored.
  • the voltage value when the drive circuit 230 is on is the first voltage value and the voltage value of the minute voltage is the second voltage value, the second voltage value is greater than the first voltage value. Is also small.
  • the temperature of the heat generating member 128 is always acquired, and the output is turned on or the minute voltage is appropriately switched based on this temperature, so that the stability of the temperature control is improved. Further, since the power supply state to the heat generating member 128 can be always grasped, it can be always monitored whether or not an abnormality has occurred in the grip portion 110.
  • the abnormality of the gripping part 110 includes, for example, breakage of the heater 124.
  • a third embodiment will be described. Here, differences from the first embodiment will be described, and the same portions will be denoted by the same reference numerals and description thereof will be omitted.
  • PWM control is performed.
  • the offset value ⁇ T is determined according to the rate of temperature decrease during the period when the output is off.
  • control flow according to this embodiment is the same as that in the first embodiment described with reference to FIG. However, the processing in step S105 and the processing in step S106 are different from those in the first embodiment.
  • Processing of the control unit 210 according to the present embodiment will be described with reference to a flowchart shown in FIG. FIG. 9 shows the relationship among the output state, the temperature of the heat generating member 128, and the offset value ⁇ T with respect to the elapsed time in the present embodiment.
  • step S101 the control unit 210 performs an initial setting based on an input to the input unit 240 by the user.
  • control unit 210 determines whether or not an instruction to start heating has been input. When the instruction to start heating is not input, the process returns to step S102. When an instruction to start heating is input, the process proceeds to step S103.
  • step S103 the control unit 210 sets the pulse width W of the pulse output from the drive circuit 230 to an initial value.
  • the controller 210 causes the drive circuit 230 to output the pulse having the pulse width W set in step S103.
  • step S105 the controller 210 calculates the temperature of the heat generating member.
  • the control unit 210 calculates the temperature of the heat generating member 128 immediately after the output is turned on and the temperature of the heat generating member 128 immediately before the output is turned off.
  • step S106 the control unit 210 calculates an offset value ⁇ T.
  • the offset value ⁇ T is the value immediately after the output at the previous output is turned on from the temperature T1 (for example, the temperature T11 in FIG. 9) of the heat generating member 128 immediately before the output at the previous output is turned off.
  • C5 is a predetermined constant
  • t_off is the length of the off period in the previous output. It can be said that the faster the temperature drop, the easier the heat of the heat generating member 128 is taken away. In such a state, the temperature difference between the temperature of the heat generating member 128 and the temperature of the heat transfer member 122 becomes large. Therefore, in such a case, the offset value ⁇ T is set large. On the other hand, it can be said that the slower the temperature drop, the more difficult the heat of the heat generating member 128 is taken away. In such a state, the temperature difference between the temperature of the heat generating member 128 and the temperature of the heat transfer member 122 becomes small. Therefore, in such a case, the offset value ⁇ T is set small.
  • step S107 the control unit 210 sets a value obtained by adding ⁇ T to the target temperature as a corrected target temperature, and determines a pulse width W of a pulse to be output next based on the corrected target temperature.
  • step S108 the control unit 210 causes the drive circuit 230 to output the pulse having the pulse width W determined in step S108.
  • step S109 the control unit 210 determines whether or not the treatment is completed. When the treatment is not completed, the process returns to step S105. On the other hand, when the treatment is completed, the process proceeds to step S110. In step S110, the control unit 210 causes the drive circuit 230 to stop outputting. Thereafter, the process ends.
  • FIG. 9 will be described with reference to FIG. 9 showing the relationship between the output state with respect to the elapsed time, the temperature of the heat generating member 128, and the offset value ⁇ T in this embodiment.
  • the first graph from the top shows the output state, and here, for the purpose of explanation, numbers (1) to (6) are assigned to the pulses.
  • the second graph from the top shows the temperature of the heat generating member 128.
  • the temperature immediately before turning off the pulse (1) is T11
  • the temperature immediately after turning on the pulse (2) is T21
  • the temperature immediately before turning off the pulse (2) is T12.
  • the temperature immediately after the pulse (3) is turned on is T22
  • the temperatures are T13, T23, T14, T24, T15, and T25.
  • the third graph from the top shows the offset value ⁇ T.
  • ⁇ T1 is calculated based on the temperature T11 and the temperature T21.
  • ⁇ T2 is calculated based on the temperature T12 and the temperature T22. The same applies hereinafter.
  • the offset value ⁇ T is taken into consideration, so that the temperature of the living tissue that is the treatment target can be appropriately controlled so as to become the initially set target temperature T_target1.
  • the temperature of the heat generating member 128 is not acquired while the output is off. For this reason, in order to obtain the rate of temperature decrease during the period in which the output is off, the temperature of the heating member 128 immediately before turning off the output in the previous output and immediately after turning on the output in the previous output The temperature of the heating member 128 must be used. Therefore, when the situation changes suddenly, the previous situation may not be accurately grasped.
  • the output when the output is turned off, the power supply to the heat generating member 128 is not completely stopped, but a minute voltage is applied to the heat generating member 128.
  • the temperature of the heating member 128 is always acquired. That is, the output from the drive circuit 230 is not on or off, but on or a minute voltage.
  • the output becomes a minute voltage using the temperature of the heating member 128 immediately before the output at the previous output is set to a minute voltage and the temperature of the heating member 128 just before the output at the current output is turned on.
  • the rate of temperature decrease during a certain period can be obtained. Further, the speed may be obtained from the temperature drop during a part of the period when the output is a minute voltage.
  • the temperature of the heat generating member 128 is always acquired, so that the immediately preceding situation is accurately grasped, and the offset value ⁇ T is calculated based on the immediately preceding situation. Therefore, a more appropriate offset value ⁇ T can be calculated. Further, since the power supply state to the heat generating member 128 can be always grasped, it can be always monitored whether or not an abnormality has occurred in the grip portion 110.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un dispositif de traitement (1) qui comprend un élément de transfert de chaleur (122) qui est mis en contact avec un tissu biologique et transfère la chaleur au tissu biologique, ainsi qu'un élément chauffant (128) qui chauffe l'élément de transfert de chaleur. Le dispositif de traitement (1) comprend également : un circuit d'attaque (230) qui fournit, à l'élément chauffant, une tension constante d'une première valeur de tension lorsqu'il est en position MARCHE et une tension constante d'une seconde valeur de tension lorsqu'il est en position ARRÊT; une unité de calcul de valeur de décalage (212) qui calcule une valeur de décalage correspondant à la différence de température entre l'élément de transfert de chaleur et l'élément chauffant sur la base de la longueur de la période MARCHE ou de la longueur de la période ARRÊT; une unité de réglage de sortie (213) qui règle le circuit d'attaque (230) sur MARCHE ou ARRÊT de sorte que la température de l'élément chauffant soit maintenue à une température cible révisée obtenue en ajoutant la valeur de décalage à une température cible; et une unité de commande d'attaque (214) qui commande le fonctionnement du circuit d'attaque sur la base du réglage sur la position MARCHE ou ARRÊT.
PCT/JP2015/083418 2014-12-12 2015-11-27 Dispositif de traitement WO2016093086A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016540718A JPWO2016093086A1 (ja) 2014-12-12 2015-11-27 処置装置

Applications Claiming Priority (2)

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JP2014252021 2014-12-12
JP2014-252021 2014-12-12

Publications (1)

Publication Number Publication Date
WO2016093086A1 true WO2016093086A1 (fr) 2016-06-16

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JP (1) JPWO2016093086A1 (fr)
WO (1) WO2016093086A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018198208A1 (fr) * 2017-04-25 2018-11-01 オリンパス株式会社 Système de traitement
CN109640853A (zh) * 2016-08-04 2019-04-16 奥林巴斯株式会社 控制装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008534068A (ja) * 2005-03-25 2008-08-28 オリジン・メッドシステムズ・インコーポレイテッド 組織溶接および切断装置
JP2012125338A (ja) * 2010-12-14 2012-07-05 Olympus Corp 治療用処置装置及びその制御方法
JP2012161566A (ja) * 2011-02-09 2012-08-30 Olympus Medical Systems Corp 治療用処置装置及びその制御方法
JP2013022354A (ja) * 2011-07-25 2013-02-04 Olympus Corp 治療用処置装置
WO2014119391A1 (fr) * 2013-02-01 2014-08-07 オリンパス株式会社 Dispositif de traitement thérapeutique et son procédé de commande

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008534068A (ja) * 2005-03-25 2008-08-28 オリジン・メッドシステムズ・インコーポレイテッド 組織溶接および切断装置
JP2012125338A (ja) * 2010-12-14 2012-07-05 Olympus Corp 治療用処置装置及びその制御方法
JP2012161566A (ja) * 2011-02-09 2012-08-30 Olympus Medical Systems Corp 治療用処置装置及びその制御方法
JP2013022354A (ja) * 2011-07-25 2013-02-04 Olympus Corp 治療用処置装置
WO2014119391A1 (fr) * 2013-02-01 2014-08-07 オリンパス株式会社 Dispositif de traitement thérapeutique et son procédé de commande

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109640853A (zh) * 2016-08-04 2019-04-16 奥林巴斯株式会社 控制装置
CN109640853B (zh) * 2016-08-04 2021-10-22 奥林巴斯株式会社 控制装置
WO2018198208A1 (fr) * 2017-04-25 2018-11-01 オリンパス株式会社 Système de traitement

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