System and method for tissue sealing
First Claim
1. An electrosurgical bipolar forceps for sealing tissue, comprising:
- at least one shaft member having an end effector assembly disposed at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least one subsequent position wherein the jaw members cooperate to grasp tissue therebetween at constant pressure;
each of the jaw members including an electrically conductive sealing plate adapted to connect to a first energy source which communicates electrosurgical energy through tissue held therebetween, wherein the electrosurgical energy is communicated at constant voltage; and
sensor circuitry operably connected to the electrically conductive sealing plates, the sensor circuitry configured to measure initial tissue impedance and transmit an initial impedance value to a controller, the controller configured to determine the constant pressure and the constant voltage to be applied to the tissue based on the initial impedance value.
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Accused Products
Abstract
An electrosurgical bipolar forceps for sealing is disclosed. The forceps includes one or more shaft members having an end effector assembly disposed at the distal end. The end effector assembly includes two jaw members movable from a first position to a closed position wherein the jaw members cooperate to grasp tissue at constant pressure. Each of the jaw members includes an electrically conductive sealing plate connected to a first energy source which communicates electrosurgical energy through the tissue held therebetween. The electrosurgical energy is communicated at constant voltage. The electrically conductive sealing plates are operably connected to sensor circuitry which is configured to measure initial tissue impedance and transmit an initial impedance value to a controller. The controller determines the constant pressure and the constant voltage to be applied to the tissue based on the initial impedance value.
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Citations
16 Claims
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1. An electrosurgical bipolar forceps for sealing tissue, comprising:
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at least one shaft member having an end effector assembly disposed at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least one subsequent position wherein the jaw members cooperate to grasp tissue therebetween at constant pressure;
each of the jaw members including an electrically conductive sealing plate adapted to connect to a first energy source which communicates electrosurgical energy through tissue held therebetween, wherein the electrosurgical energy is communicated at constant voltage; and
sensor circuitry operably connected to the electrically conductive sealing plates, the sensor circuitry configured to measure initial tissue impedance and transmit an initial impedance value to a controller, the controller configured to determine the constant pressure and the constant voltage to be applied to the tissue based on the initial impedance value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrosurgical system, comprising:
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an electrosurgical generator which supplies electrosurgical energy;
bipolar forceps for treating tissue comprising;
at least one shaft member having an end effector assembly disposed at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least one subsequent position wherein the jaw members cooperate to grasp tissue therebetween at constant pressure, wherein each of the jaw members includes an electrically conductive sealing plate adapted to connect to the electrosurgical generator and to communicate electrosurgical energy through tissue held therebetween, wherein the electrosurgical energy is communicated at constant voltage; and
sensor circuitry operably connected to the electrically conductive sealing plates, the sensor circuitry configured to measure initial tissue impedance and transmit an initial impedance value to a controller, the controller configured to determine the constant pressure and the constant voltage to be applied to tissue based on the initial impedance value. - View Dependent Claims (10, 11, 12)
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13. A method for sealing tissue comprising the steps of:
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providing an electrosurgical bipolar forceps comprising;
at least one shaft member having an end effector assembly disposed at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least one subsequent position wherein the jaw members cooperate to grasp tissue therebetween at constant pressure, wherein each of the jaw members includes an electrically conductive sealing plate adapted to connect to a first energy source which communicates electrosurgical energy at constant voltage through tissue held between the jaw members;
measuring initial tissue impedance and transmitting an initial impedance value to a controller; and
determining the constant pressure and the constant voltage to be applied to the tissue based on the initial impedance value. - View Dependent Claims (14, 15, 16)
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Specification