Device for bipolar high-frequency coagulation of biological tissue
First Claim
1. A device for bipolar high-frequency coagulation of biological tissue comprising:
- a coagulating pincer with a first shank defining a first contact face and a second shank defining a second contact face;
a controllable high-frequency generator;
said first shank contact fee and said second shank contact face electrically connected to said generator;
a pair of temperature sensors, one of said sensors located near said first shank contact face and the other of said sensors located near said shank contact face;
evaluation means having a controller for controlling said high-frequency generator with a first selectively preset input representing a predetermined coagulation temperature and a second input;
a first comparator connected to said temperature sensors, and having an output; and
changeover switch means having a first input connected to said output of said first comparator, a second input connected to one of said temperature sensors, a third input connected to the other of said temperature sensors, and an output connected to said second input of said controller, whereby said changeover switch means electrically connects the temperature sensor representing the highest temperature to said second input of said controller;
said evaluation means connected to said temperature sensors for evaluating the temperatures near said first and second contact faces and controlling said high-frequency generator in response to said highest temperature.
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Accused Products
Abstract
A device for bipolar high-frequency coagulation of biological tissue between two contact faces of a coagulating instrument. The two contact faces are connected to an output of a high-frequency generator. A temperature sensor is arranged near each of the two contact faces. A circuit for evaluating the measured temperatures and/or the temperature differential controls the coagulation temperature and the shutoff of the high-frequency generator as a preselected temperature or temperature differential is exceeded. Moreover, an indicating device is provided for acoustically and/or optically indicating the temperatures on the contact faces as well as the temperature differential between the contact faces.
425 Citations
23 Claims
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1. A device for bipolar high-frequency coagulation of biological tissue comprising:
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a coagulating pincer with a first shank defining a first contact face and a second shank defining a second contact face; a controllable high-frequency generator; said first shank contact fee and said second shank contact face electrically connected to said generator; a pair of temperature sensors, one of said sensors located near said first shank contact face and the other of said sensors located near said shank contact face; evaluation means having a controller for controlling said high-frequency generator with a first selectively preset input representing a predetermined coagulation temperature and a second input; a first comparator connected to said temperature sensors, and having an output; and changeover switch means having a first input connected to said output of said first comparator, a second input connected to one of said temperature sensors, a third input connected to the other of said temperature sensors, and an output connected to said second input of said controller, whereby said changeover switch means electrically connects the temperature sensor representing the highest temperature to said second input of said controller; said evaluation means connected to said temperature sensors for evaluating the temperatures near said first and second contact faces and controlling said high-frequency generator in response to said highest temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A device for bipolar high-frequency coagulation of biological tissue comprising;
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a coagulating pincer with a first shank defining a first contact face and a second shank defining a second contact face; a controllable high-frequency generator; said first shank contact face and said second shank contact face electrically connected to said generator; a pair of temperature sensors, one of said pair of sensors located near said first shank contact face and the other of said sensors located near said second shank contact face; a control means having a controller with a first and second input and an output, said first input connected to a selectively preset electrical signal representing a predetermined coagulation temperature, said output connected to said high-frequency generator a first comparator connected to said temperature sensors and having an output; and changeover switch means having a first input connected to said output of said first comparator, a second input connected to one of said temperature sensors, a third input connected to the other of said temperature sensors, and an output connected to said second input of said controller, whereby said changeover switch means electrically connects the temperature sensor representing the highest temperature to said second input of said controller; said control means connected to said temperature sensors for evaluating the temperatures near said contact faces and controlling said high-frequency generator in response to the temperatures sensed by said sensors. - View Dependent Claims (21, 22)
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23. A device for bipolar high-frequency coagulation of biological tissue comprising;
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a coagulating pincer with a first shank defining a first contact face and a second shank defining a second contact face; a controllable high-frequency generator; said first shank contact face and said second shank contact face electrically connected to said generator; a pair of temperature sensors, one of said pair of sensors located near said first shank contact face and the other of said sensors located near said second shank contact face; control means for connecting the highest temperature of one of said first contact face and said second contact face to said generator, means for sensing the temperature differential between said first contact face sensor and said second contact face sensor; said control means for connecting the highest temperature contact face and said means for sensing the temperature differential coupled between said temperature sensors and said generator to control the energization of said pincer.
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Specification