Surgical instruments
First Claim
1. A surgical device comprising:
- a transducer to provide vibrations;
an end effector coupled to the transducer and extending from the transducer along the longitudinal axis; and
a control circuit configured to;
detect a change in a vibration frequency of the end effector;
correlate the detected change in the vibration frequency of the end effector to a change in tissue condition corresponding to the detected change in the vibration frequency of the end effector; and
generate a signal indicating the change in tissue condition corresponding to the detected change in the vibration frequency.
4 Assignments
0 Petitions
Accused Products
Abstract
A surgical device. The surgical device may comprise a transducer, an end effector, a generator and a control circuit. The transducer may be configured to provide vibrations. The end effector may be coupled to the transducer and may extend from the transducer along the longitudinal axis. The generator may provide an electrical signal to the transducer. Also, the control circuit may modify a current amplitude of the electrical signal in response to a change in a vibration frequency of the end effector. Accordingly to various embodiments, the control circuit may detect a first contribution to a vibration frequency of the end effector, the first contribution originating from tissue in contact with the end effector. Also, according to various embodiments, the control circuit may indicate a change in a vibration frequency of the end effector.
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Citations
21 Claims
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1. A surgical device comprising:
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a transducer to provide vibrations; an end effector coupled to the transducer and extending from the transducer along the longitudinal axis; and a control circuit configured to; detect a change in a vibration frequency of the end effector; correlate the detected change in the vibration frequency of the end effector to a change in tissue condition corresponding to the detected change in the vibration frequency of the end effector; and generate a signal indicating the change in tissue condition corresponding to the detected change in the vibration frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A surgical device comprising:
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a transducer to provide vibrations; an end effector coupled to the transducer and extending from the transducer along a longitudinal axis; a clamping mechanism translatable toward the end effector; and a control circuit configured to; calculate a curve representing a coefficient of collagen denaturation over time considering; a power delivered by the end effector to a portion of tissue; a clamp force applied to the portion of tissue between the end effector and the clamping mechanism; a displacement of the end effector; and a vibration frequency of the end effector; and correlate at least one property of the calculated curve to a corresponding property of tissue in contact with the end effector; and generate a signal indicating the corresponding property of the tissue in contact with the end effector. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A surgical device comprising:
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a transducer to provide vibrations; an end effector coupled to the transducer and extending from the transducer along a longitudinal axis; a clamping mechanism translatable toward the end effector; and a control circuit configured to; calculate a plurality of values over time for a coefficient of collagen denaturation considering; a power delivered by the end effector to a portion of tissue; a clamp force applied to the portion of tissue between the end effector and the clamping mechanism; a displacement of the end effector; and a vibration frequency of the end effector; and correlate at least one property of the plurality of values over time to a corresponding property of tissue in contact with the end effector; and generate a signal indicating the corresponding property of the tissue in contact with the end effector.
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Specification