摘要:
A method for operating a medical probe includes pressing a distal end of the medical probe, which includes one or more arms that extend diagonally outward from a central shaft and have respective position transducers coupled thereto, against an intra-body surface, so as to cause the arms to exert pressure on the surface and bend with respect to the central shaft in response to the pressure. Positions of the respective position transducers coupled to the arms are measured, and the pressure exerted by the arms is estimated responsively to the measured positions.
摘要:
A system for determining proximity of a surgical device relative to an anatomical structure includes at least one surgical device having a sensor assembly operably coupled to a processing unit. The sensor assembly is configured to transmit at least one electrical signal through the target anatomical structure to elicit a measurable response from the target anatomical structure. The processing unit is configured to calculate a signature property value of the target anatomical structure based on the measurable response and to determine proximity of the at least one surgical device relative to the target anatomical structure based on a comparison between the signature property value and at least one other signature property. An indicator is operably coupled to the processing unit and is configured to alert a user of the identified target anatomical structure based on the determined proximity.
摘要:
A system for determining proximity of a surgical device relative to an anatomical structure includes at least one surgical device having a sensor assembly operably coupled to a processing unit and configured to transmit at least one electrical signal generated by the processing unit through a target anatomical structure to elicit a measurable response from the target anatomical structure. The processing unit is configured to calculate a signature property value of the target anatomical structure based on the measurable response. The processing unit is configured to identify the target anatomical structure based on a comparison between the signature property value and at least one other signature property.
摘要:
A cautery instrument includes a brush-type contact providing a sliding electrical connection to a jaw of the instrument. To provide isolation, the jaws may have ends in cavities in a clevis made of an insulating material. Non-conducting drive cables can be attached to the jaws using high friction paths that prevent or resist slippage of the cables relative to the jaws.
摘要:
In a robot system for endoscopic treatment, a gripping force detection unit configured to detect gripping force is provided at a gripping unit (12) configured to open and close by an operation of wire (17) from a surgeon's front side, and a treatment instrument control unit (7) is configured to instruct a treatment instrument drive unit (3) on the operation of wire (17) configured to drive the gripping unit (12) so that the gripping force detected by the gripping force detection unit falls within a range of a predetermined threshold when the gripping unit in a gripping state is moved.
摘要:
An automatic control circuit for an electrosurgical generator is herein disclosed. The automatic control circuit includes voltage and current sensing circuits, a processing circuit, a dosage calculating circuit, and control circuit. Samples of the voltage and current outputs are supplied to the processing circuit and the dosage calculating circuit to generate a dosage output signal. The dosage output signal is compared to a reference signal to generate a feedback signal that controls a drive circuit.
摘要:
An electrosurgical system is disclosed. The electrosurgical system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The electrosurgical generator includes impedance sensing circuitry which measures impedance of tissue, a processor configured to determine whether a tissue reaction has occurred as a function of a minimum impedance value and a predetermined rise in impedance, wherein tissue reaction corresponds to a boiling point of tissue fluid, and an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue. A tissue cooling period is provided to enhance operative outcomes.
摘要:
A circuit for controlling the discharging of stored energy in an electrosurgical generator includes a pulse modulator which controls an output of a power supply. At least one comparator is configured to provide an error signal to the pulse modulator based on a comparison between an output signal generated by the power supply and a feedback signal generated in response to the application of energy to tissue. A discharge circuit is configured to control the discharge of the output of the power supply to an inductive load disposed in parallel with the output of the power supply based on the comparison between the output signal and the feedback signal. The discharge circuit provides a rapid response and time rate control of the delivered electrosurgical energy by controlling the power supply and delivered RF energy in real time, based on a feedback signal generated in response to the application of energy to tissue.