Modular battery powered handheld surgical instrument with energy conservation techniques

A method of conserving energy in a surgical instrument that includes a segmented circuit having a plurality of independently operated circuit segments, a voltage control circuit, an energy source, a memory, and a processor coupled to the memory. The processor is configured to control a state of a circuit segment of the plurality of circuit segments. The state can be an energized state or a deenergized state. The method includes transmitting an energizing signal from the processor to a voltage control circuit, receiving the energizing signal by the voltage control circuit to apply a voltage to a circuit segment of the plurality of circuit segments, applying the voltage to the circuit segment by the voltage control circuit to cause the circuit segment to transition from the deenergized state to the energized state in accordance with an energization sequence that is different from a deenergization sequence.

Modular battery powered handheld surgical instrument with variable motor control limits

A surgical instrument comprises a shaft assembly; a handle assembly; a battery assembly; a first driver configured to drive movement of at least a first component of the surgical instrument; a second driver configured to drive movement of at least a second component of the surgical instrument; a motor powered by the battery assembly and configured to selectively actuate the first driver or the second driver using an output of the motor; and a controller for the motor, configured to: perform a first limiting operation to the output of the motor when the motor actuates the first driver and a first limiting condition is met, and perform a second limiting operation to the output of the motor when the motor actuates the second driver and a second limiting condition is met.

Modular battery powered handheld surgical instrument with reusable asymmetric handle housing

A surgical instrument is disclosed. The surgical instrument includes a handle assembly that includes a handle housing. The handle housing comprises two asymmetric portions, a first portion configured to support mechanical and electrical components of the surgical instrument and a second portion comprising a removable cover.

Modular battery powered handheld surgical instrument with selective application of energy based on button displacement, intensity, or local tissue characterization

A surgical instrument comprises a controller configured to control application of RF or ultrasonic energy at a low level when displacement or intensity of a button is above a first threshold but below a second threshold higher than the first threshold, and control application of RF or ultrasonic energy at a high level when the displacement or intensity exceeds the second threshold. In another aspect, a surgical instrument comprises a first sensor configured to measure a tissue characteristic at a first location, a second sensor configured to measure the tissue characteristic at a second location, and a controller configured to, based at least in part on the measured tissue characteristic at the first location and the second location, control application of RF or ultrasonic energy.

COMPOSITION COMPRISING POLYGLYCEROL ESTERS AND HYDROXYALKYL-MODIFIED GUAR

The invention relates to compositions comprising polyglycerol esters and hydroxyalkyl-modified guar.

Modular battery powered handheld surgical instrument and methods therefor

Disclosed is a method of controlling a modular battery powered handheld surgical instrument. The surgical instrument including a battery, a user input sensor, a controller, a radio frequency (RF) drive circuit, an ultrasonic transducer, ultrasonic transducer drive circuit, and an end effector. The end effector including an electrode electrically coupled to RF drive circuit, an ultrasonic blade acoustically coupled to the ultrasonic transducer, and a sensor to measure tissue parameters. The method includes applying an RF current drive signal to the electrode by the RF drive circuit; applying an ultrasonic drive signal to the ultrasonic transducer by the ultrasonic transducer drive circuit to acoustically excite the ultrasonic blade; controlling intensity, wave shape, and/or frequency of the RF current drive signal and the ultrasonic drive signal on a sensed measure of a tissue or user parameter.

Modular battery powered handheld surgical instrument with selective application of energy based on tissue characterization

A surgical instrument comprises a shaft assembly comprising a shaft and an end effector coupled to a distal end of the shaft; a handle assembly coupled to a proximal end of the shaft; a battery assembly coupled to the handle assembly; a radio frequency (RF) energy output powered by the battery assembly and configured to apply RF energy to a tissue; an ultrasonic energy output powered by the battery assembly and configured to apply ultrasonic energy to the tissue; and a controller configured to, based at least in part on a measured tissue characteristic, start application of RF energy by the RF energy output or application of ultrasonic energy by the ultrasonic energy output at a first time.

Modular battery powered handheld surgical instrument with curved end effectors having asymmetric engagement between jaw and blade

An end effector for a surgical instrument is disclosed. The end effector includes an ultrasonic blade and a jaw member including an asymmetric electrode comprising a first electrode and a second electrode. The first electrode defines a first width and the second electrode defines a second width. The first width is not equal to the second width. A first gap is defined between the first electrode and the ultrasonic blade and a second gap is defined between the second electrode and the ultrasonic blade. The first gap is not equal to the second gap.

MODULAR BATTERY POWERED HANDHELD SURGICAL INSTRUMENT WITH A PLURALITY OF CONTROL PROGRAMS

A battery powered modular surgical instrument includes a control handle assembly with a processor coupled to a memory, a shaft assembly operably coupled to the control handle assembly and detachable therefrom. The shaft assembly includes circuit modules and a memory. The control programs are configured to operate the circuit modules. The control programs include computer executable instructions. The instrument also includes a transducer assembly operably coupled to the control handle assembly and detachable therefrom. The transducer assembly includes a memory and a transducer configured to convert a drive signal to mechanical vibrations. The control programs are configured to control the conversion of the drive signal to mechanical vibrations. The instrument also includes a battery assembly operably coupled to the control handle assembly and detachable therefrom. The battery assembly comprises a memory and is configured to power the surgical instrument.

Modular battery powered handheld surgical instrument containing elongated multi-layered shaft

Provided is a system including a surgical instrument comprising a handle assembly comprising a handle; a shaft assembly coupled to the handle assembly; and a flexible circuit. The handle assembly comprises a proximal portion of the flexible circuit and the shaft assembly comprises a distal portion of the flexible circuit; the shaft assembly further comprising: an exterior shaft positioned around the distal portion of the flexible circuit and configured to change position while a sub-portion of the distal portion of the flexible circuit remains stationary; and shaft control electronics comprising a stationary portion and a non-stationary portion, the stationary portion coupled to the distal portion of the flexible circuit and the non-stationary portion coupled to the exterior shaft; wherein the stationary portion of the shaft control electronics is configured to measure a distance to the non-stationary portion of the shaft control electronics as the exterior shaft changes position.