摘要:
A method for delivering RF energy to living tissue includes the steps of extending a guidewire to a tissue treatment site in a body. A controllable stiffness catheter is provided with a stiffness device having non-metallic properties and a temperature-changing device. The stiffness device is in a stiff state below a given temperature and in a soft state above the given temperature. While supplying power to the temperature-changing device, the catheter is threaded along the guidewire up to the treatment site in the soft state. Power is removed from the temperature-changing device to alter the non-metallic properties of the stiffness device and directly result in a change of the stiffness device to the stiff state without straightening the catheter. The RF energy supply device is physically contacted with the treatment site and RF energy is delivered to the treatment site from the RF energy supply device.
摘要:
A method of maintaining a constant movement of a cutting blade of an ultrasonic waveguide includes providing an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide, a measurement circuit connected in a parallel configuration with the ultrasonic transducer, and a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer. Current is supplied through a set of connection points of the parallel configuration with the variable power source to, thereby, create the motional current in the ultrasonic transducer and the motional current is regulated with a current controller by varying an output of the power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
摘要:
An electrically powered surgical instrument includes a surgical end effector having a surgical procedure effecting actuation assembly. A handle is coupled with the end effector. An electric motor is disposed within a shell of the handle and has power terminals and a drive train actuating the assembly when the motor is supplied with power. A break-before-make power supply switch at the handle selectively controls supply of power to the motor. A post-termination braking circuit electrically short-circuits the power terminals when the switch does not supply power to the motor. A method for post-termination braking of an electrical motor utilizes the permanent magnetic field of the motor to counteract an inertia-induced over-stroke characteristic of the motor, drive train, and/or actuation assembly after powered operation by short-circuiting the still-spinning motor to create an electrically generated magnetic field in opposition to the permanent magnetic field upon ceasing supply of power to the motor.
摘要:
An ultrasonic surgical assembly includes an ultrasonic waveguide having a proximal end for receiving ultrasonic movement thereat, an ultrasonic-movement-generator assembly having a shell, an ultrasonic-driving-wave-signal generating circuit housed within the shell, and an ultrasonic transducer having a proximal end disposed within the shell and an ultrasonic-movement-producing distal end, and a handle body having a waveguide attachment dock operable to accept the waveguide therein, an assembly dock shaped to removably secure at least a portion of the ultrasonic-movement-generator assembly thereat, the assembly dock operable to selectively removably secure at least the shell thereat and to position the ultrasonic-movement-producing distal end of the ultrasonic transducer co-axially opposite the proximal end of the ultrasonic waveguide when the ultrasonic waveguide is disposed within the waveguide attachment dock.
摘要:
A surgical stapling instrument includes a handle having a stapler-closing device. A surgical stapling end effector is connected to the handle and has a pair of opposing stapling surfaces. At least one of the stapling surfaces is operable to move with respect to the other of the stapling surfaces upon actuation of the stapler-closing device to apply a compressive force to tissue therebetween. At least one variable member is operable to receive the compressive force applied to the tissue and to exhibit at least one of mechanical and electrical change associated with the received compressive force. The change influences a surgical procedure on the compressed tissue.
摘要:
A battery assembly for use with a surgical device having a battery terminal and operational parameters includes a housing having a shape formed to removably connect with the terminal. The housing contains a modular battery operable to supply power to the device at the terminal and has a control circuit with a microprocessor, a memory, and a real-time clock. The control circuit is communicatively coupled to the battery and is operable to detect an identity of the surgical device, to determine at least one piece of information pertaining to at least one of the operational parameters of the surgical device based upon the detected identity, to record the piece of information at least in the memory, and to selectively allow or prevent the battery from supplying power to the surgical device dependent upon the piece of information.
摘要:
An ultrasonic surgical assembly includes an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide, a measurement circuit connected in a parallel configuration with the ultrasonic transducer, a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer, and a current controller operable to regulate the motional current by varying an output of the variable power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
摘要:
A method for powering electrically powered surgical instruments includes removably inserting a cordless battery assembly into a handle thereof, the instrument handles having a battery chamber and different types. The battery assembly comprises an energy cell powering a signal generation assembly of the instruments. A battery/handle interface has connectors mating with connectors within the chamber. A voltage-control circuit is operable to communicate with and power the signal generation assembly, detect which handle type is connected to the battery assembly, and provide different outputs in response to a detection of the handle types. As the battery assembly is inserted, connectors of the battery/handle interface are coupled with connectors within the battery chamber to communicatively couple the voltage-control circuit to the signal generation assembly and provide power thereto. The connected handle is detected and dependent upon the detected handle type a different one of the outputs are provided.
摘要:
An ultrasonic, self-powered surgical device includes a handle, a self-contained power supply associated with the handle, and a control circuit disposed within the handle and/or the power supply. The control circuit is operable to carry out at least two operational conditions of the surgical device. A two-stage switch is electrically connected to the control circuit and effects the at least two operational conditions of the surgical device. A first stage of the switch effects a first of the at least two operational conditions and a second stage of the switch effects a second of the at least two operational conditions that is different from the first operational condition.
摘要:
A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide includes the steps of providing an ultrasonic transducer operable to convert a received motional voltage into a movement of a cutting blade of an ultrasonic waveguide, a motional feedback circuit connected in a parallel configuration with the ultrasonic transducer, and a variable power source operable to apply a first voltage between a set of connection points to the parallel configuration. A feedback voltage measured from the motional feedback circuit is determined and an output of the power source is varied based upon the measured feedback voltage to result in a substantially constant feedback voltage and, thereby, maintain a substantially constant rate of movement of the cutting blade across a variety of cutting loads.