Medical systems and methods for making and using medical systems are disclosed. Example medical systems may include an atherectomy system configured to engage and remove plaque from walls in vessels of a vascular system. The atherectomy system may include a drive shaft, a rotational tip coupled to an end of the drive shaft, a drive mechanism coupled to the drive shaft to rotate the rotational tip, and a control unit configured to control operation of the drive mechanism. In some cases, the control unit may include a controller for controlling operation of the drive mechanism based on sensed positions of the drive mechanism. The controller may be configured to send data to a host for analysis, compensate a control signal based on a mode of operation of the drive mechanism, determine if a stall is predicted to occur, and/or perform one or more other functions.

A system and method for managing use of medical devices. The system includes: an apparatus intended to be used in combination with one or more medical devices; one or more processing units; authorizing means, which may be associated to a medical device and including one identifier parameter able to uniquely identify said device. The processing unit includes: one reader module configured for acquiring the identifier parameter from the authorizing means; one enabling module configured to allow or inhibit use of the device with the apparatus on the basis of control parameters; and at least one calculation module configured for setting the number of uses of the device. The control parameters include the identifier parameter acquired and the number of uses calculated.

A powered endoscopic surgical apparatus is provided and includes a handle including a housing, a power source supported in the housing; an endoscopic portion extending distally from the housing of the handle; an end effector assembly coupled to a distal end of the endoscopic portion, the end effector assembly including a pair of jaws configured to perform a surgical function; a driving member; a drive source including a motor powered by the power source and connected to the driving member; and a gear assembly engaged with the motor. The gear assembly including a gear rack provided on the driving member; and a main gear operatively connected with the gear rack, the motor spinning the main gear such that rotary motion of the main gear moves the driving member in an axial direction such that the driving member actuates the end effector to perform the surgical function.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

An apparatus and method for preventing stroke by occluding blood flow through the carotid arteries and a left subclavian artery of a patient is provided. The apparatus has a first occluding catheter that carries a first occluding balloon that has an inflated configuration that occludes one of the carotid arteries. The apparatus also includes a second occluding catheter that carries a second occluding balloon that has an inflated configuration that occludes the other one of the carotid arteries. A third occluding balloon is present, that could be on an insertion device, that may occlude the left subclavian artery.

The present disclosure provides a method for controlling a surgical instrument. The method includes connecting a power assembly to a control circuit, wherein the power assembly is configured to provide a source voltage, energizing, by the power assembly, a voltage boost convertor circuit configured to provide a set voltage greater than the source voltage, and energizing, by the voltage boost convertor, one or more voltage convertors configured to provide one or more operating voltages to one or more circuit components.

Various examples are directed to systems and methods for operating a surgical instrument comprising a firing member translatable proximally and distally along a longitudinal axis between a stroke begin position to a stroke end position distal of the stroke begin position; a knife coupled to the firing member; and a motor coupled to the firing member to translate the firing member between the stroke begin position and the stroke end position. A control circuit may receive a firing signal and begin a firing member stroke by providing an initial motor setting to the motor. The control circuit may maintain the initial motor setting for an open-loop portion of the firing member stroke. The control circuit may receive firing member motion data describing a motion of the firing member during the open-loop portion of the firing member stroke and may select a firing control program based at least in part on the motion of the firing member during the open-loop portion of the firing member stroke.

A surgical instrument comprising a first jaw and a second jaw is disclosed. At least one of the first and second jaws comprises a proximal portion and a distal tip rotatable relative to the proximal portion.

Medical systems and methods for making and using medical systems are disclosed. Example medical systems may include an atherectomy system configured to engage and remove plaque from walls in vessels of a vascular system. The atherectomy system may include a drive shaft, a rotational tip coupled to an end of the drive shaft, a drive mechanism coupled to the drive shaft to rotate the rotational tip, and a control unit configured to control operation of the drive mechanism. In some cases, the control unit may include a controller for controlling operation of the drive mechanism based on sensed positions of the drive mechanism. The controller may be configured to send data to a host for analysis, compensate a control signal based on a mode of operation of the drive mechanism, determine if a stall is predicted to occur, and/or perform one or more other functions.

Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.