Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

The disclosure relates to an ophthalmic surgery apparatus for making an incision in ocular biological tissue such as a cornea or a crystalline lens. The apparatus includes: a laser source suitable for delivering a beam of laser pulses; an optical focusing system for focusing the beam of laser pulses on a focal point in the ocular biological tissue; an optical system for moving the beam of laser pulses, configured to move the focal point along a predetermined three-dimensional trajectory; a control unit configured to control the laser source, and the optical system for moving the beam of laser pulses, in such a way that the parameters of the beam of laser pulses and the parameters of the optical system for moving the beam of laser pulses are adjusted according to the position of the focal point in the trajectory during the incision.

A plurality of methods and apparatus for managing deficiencies of the meibomian gland lipid production and delivery, including wearable fabrics configured with a matrix of micro- and nano-electromechanical materials, or composite fibres of yarn that are substantially made from carbon nanotubes, graphene, spider silk, natural silk, denim, cotton, metals, or combination thereof. Other methods and apparatus include infrared and ultrasound energy sources within a kit aimed at personalised therapies for improving overall health of the eyelids, while providing for adjunctive relief for associated dry eye symptoms. The management kit may comprise a wearable fabric or spectacle frame configured with infrared emitters and sensors, a handheld imaging device and software containing dosage and administration information coupled with information on improving eyelid hygiene which is reviewed and periodically updated using user-specific information.

A surgical instrument comprising a housing, a shaft, a loading unit, a firing member configured to perform a firing stroke, a motor, a battery, a firing trigger, a control system, an electronic lockout, and a firing trigger lockout is disclosed. The electronic lockout is configured to prevent the firing member from performing the firing stroke when the loadinq unit is not attached to the shaft. The electronic lockout is further configured to prevent the firing member from performing the firing stroke when the loading unit is attached to the shaft and the loading unit has been at least partially fired. The firing trigger lockout is in a locked position when the loading unit is not attached to the elongate shaft. The firing trigger lockout is in the locked position when the loading unit is attached to the elongate shaft and the loading unit has been at least partially fired.

An ultrasonic surgical instrument and method of sealing a tissue includes generating a desired burst pressure in the tissue, sealing the tissue, verifying that the tissue is sealed with further application of at least one of the ultrasonic energy and the RF energy. The ultrasonic surgical instrument further includes an end effector having an ultrasonic blade, an RF electrode, and a controller. The controller operatively connects to the ultrasonic blade and the RF electrode and is configured to direct application of ultrasonic and RF energies according to an initial phase, a power phase, and a termination phase for respectively generating a desired burst pressure in the tissue, sealing the tissue, and verifying the sealing of the tissue while inhibiting transection of the tissue.

Described here are devices and methods for forming shock waves. The devices may comprise an axially extending elongate member. A first electrode pair may comprise a first electrode and a second electrode. The first electrode pair may be provided on the elongate member and positioned within a conductive fluid. A controller may be coupled to the first electrode pair. The controller may be configured to deliver a series of individual pulses to the first electrode pair, where each pulse creates a shock wave. The controller may cause current to flow through the electrode pair in a first direction for some of the pulses in the series and in a second direction opposite the first direction for the remaining pulses in the series.

Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical circuitry for ultrasonic vibrating the needle. A power source provides pulsed electrical power to the handpiece electrical circuitry and an input is provided for enabling a surgeon to select an amplitude of dislighted pulses and a pulse width. A control system and pulse duty cycle is provided for controlling the off duty cycle to insure heat dissipation before a subsequent pulse is activated, including a foot pedal switch.

A surgical instrument comprising a handle and a rotatable shaft is disclosed. The handle comprises a rotatable actuator configured to rotate the shaft. In various instances, the rotatable actuator is mounted to the handle in proximity to a grip of the handle so that a clinician can easily rotate the actuator while holding the handle. The direction in which the actuator is rotated corresponds to the direction in which the shaft is rotated.

Dermatological systems and methods for providing a therapeutic laser treatment using a handpiece delivering one or more therapeutic laser pulses to a target skin area along a first optical path, and sensing the temperature of the target skin area based on infrared energy radiating from the target skin area along a second optical path generally counterdirectional to the first office action, and sharing a common optical axis with the first optical path for at least a portion of the first and second optical paths. The handpiece may also provide contact cooling for a first skin area comprising the target skin area.