Abstract: Aspects of the present disclosure provide techniques for performing a safety test of a laser diode associated with an ophthalmic surgical apparatus. An example method determining a measured slope efficiency of the laser diode based on a plurality of different current levels applied to an input of the laser diode and a plurality of different output power levels associated with the laser diode, determining an expected slope efficiency of the laser diode based on a measured operating temperature of the ophthalmic surgical apparatus, determining a result of the safety test of the laser diode based on the measured slope efficiency of the laser diode and the expected slope efficiency for the laser diode, and outputting an electrical signal indicating a result of the safety test of the laser diode.

Abstract: Particular embodiments disclosed herein provide a surgical laser system comprising a laser source, a lens, a memory, and a processor in data communication with the memory and configured to execute instructions which cause the processor to control the laser source based on a detection signal received from a circuit. The circuit comprises a first amplifier, a second amplifier, and a switch coupled between the second amplifier and a reference potential node and whose state is based on an output of a first comparator. The circuit further comprises a second comparator coupled to the second amplifier and a logic gate coupled to the first comparator and the second comparator.

Abstract: Embodiments described herein generally relate to apparatus and methods for verifying the concentration of mixed gas to be used for ophthalmic administration. In an embodiment is provided a method that includes introducing a first portion of mixed gas into a chamber, determining a temperature change of the first portion which is indicative of a parameter of the first portion, determining that the parameter satisfies a predetermined value, and introducing a second portion of mixed gas into a patient's eye. In another embodiment is provided a method that includes exposing an element inside a chamber to a first portion of mixed gas, determining a change in a physical characteristic of the element that changes in response to a stimulus, the physical characteristic indicative of a parameter of the first portion, determining that the parameter satisfies a predetermined value, and introducing a second portion of mixed gas into a patient's eye.

Abstract: A surgical console has a receptacle for receiving a surgical fluidics cassette. The receptacle has a light source that transmits light to light pipes in the surgical fluidics cassette. The light pipes transmit light to a light transmissive optical interface surrounded by an opaque frame in the surgical fluidics cassette. The opaque frame is located at a fluid level detection system in the cassette. The system illuminates fluidic connectors on the surgical fluidics cassette without interfering with the fluid level detection system of a surgical console.

Abstract: Systems and methods are disclosed for measuring pulsed laser output. An example system comprises a laser configured to emit output in pulses; at least one sensor positioned to sense laser output and configured to convert that output into electrical signals; an edge detector configured to detect at least leading edges of a plurality of laser pulses; an analog to digital converter configured to convert electrical signals from a sensor into digital signals indicative of laser power output; and a controller; wherein, based on the detection of at least the leading edges of the laser pulses, the controller is configured to obtain samples of laser power output during the laser pulses. The system may refrain from sampling laser power output between laser pulses or may sample laser power output between laser pulses at a reduced sample rate. The system may use the samples of laser power output in a feedback loop to automatically adjust laser power.

Abstract: Systems and methods for driving the cutter of a vitrectomy handpiece using a substantially hermetically sealed system having a pneumatic pump for alternatively creating both positive pressure for pushing a first side of a diaphragm in the vitreous cutter and pulling negative pressure to pull the other side of the diagram, and vice versa.

Abstract: Systems for illuminating fluidic connectors on a surgical fluidics cassette without interfering with a fluid level detection system of a surgical console.

Abstract: Systems and methods for for driving the cutter of a vitrectomy handpiece using a substantially hermetically sealed system having a pneumatic pump for alternatively creating both positive pressure for pushing a first side of a diaphragm in the vitreous cutter and pulling negative pressure to pull the other side of the diagram, and vice versa.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: An adjustable annuloplasty device is described. The device includes a body member comprising a shape memory material, the body member configured to be placed at or near a base of a valve of a heart. The device further includes a hysteretic material configured to undergo magnetic hysteresis in response to a first activation energy, the hysteretic material being in thermal communication with the shape memory material. The body member may have a first size of a body member dimension in a first configuration and a second size of the body member dimension in a second configuration. When the body member is in position in the heart, a change from the first configuration to the second configuration changes a size of a dimension of the annulus of the valve.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: An adjustable annuloplasty device is described. The device includes a body member comprising a shape memory material, the body member configured to be placed at or near a base of a valve of a heart. The device further includes a hysteretic material configured to undergo magnetic hysteresis in response to a first activation energy, the hysteretic material being in thermal communication with the shape memory material. The body member may have a first size of a body member dimension in a first configuration and a second size of the body member dimension in a second configuration. When the body member is in position in the heart, a change from the first configuration to the second configuration changes a size of a dimension of the annulus of the valve.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.

Abstract: A high frequency electrosurgical power generator configured to produce electrical power at a frequency of about 1 to about 14 MHz and preferably having an essentially sinusoidal waveform with a voltage level up to 1,000 Vrms, and a current level up to 5 Amps. The output of the high frequency electrosurgical power generator is connected to an electrosurgical tool configured to receive the voltage and current produced by the electrosurgical power generator and deliver the voltage and current to an electrosurgical site. The output of the electrosurgical generator preferably is an essentially sinusoid waveform with a frequency between about 3 MHz and about 8 MHz, up to about 700 volts rms, up to about 2 amps, with a total power of up to 1,000 watts.