The device (10) for mounting and demounting a hollow needle (12) on or from a phaco instrument handpiece (14) comprises a housing (16) having a torque limiting and non-return coupling (34). The coupling (34) is provided with corresponding coupling release projections (58) and coupling recesses (56) on two coupling surfaces (36), (38). Said coupling surfaces (36, 38) further have corresponding non-return projections (62) and non-return recesses (60). The coupling (34) is formed by a driver element (32) and a rotary shaft (18) having a plug-on end (22) for plugging on the hollow needle (12) to be mounted and demounted, respectively.

A vitrectomy probe includes a hollow needle having a sidewall and a tip, a port formed in the sidewall of the hollow needle and spaced apart from the tip, and a cutter positioned within the hollow needle. The cutter is slidable relative to the port to cut tissue within the port. The vitrectomy probe also includes a manipulation feature defined by at least one recess formed in the tip of the hollow needle, the sidewall of the hollow needle, or both. The manipulation feature is configured to facilitate manipulation of tissue using the hollow needle.

Provided is a controller for an electrical drive unit—which drives a treatment needle—of an ophthalmosurgical handpiece, comprising a generator unit, which provides a control variable with control oscillation, wherein the control oscillation has a first oscillation component at a first control frequency, wherein the first oscillation component is settable depending on a first ratio of a mechanical deflection amplitude of the treatment needle to the electrical control variable at the first control frequency.

It is proposed that the generator unit is configured to provide the control oscillation of the control variable with at least one further oscillation component at a further control frequency, different than any other control frequency, in such a way that the further oscillation component is settable depending on a further ratio of the mechanical deflection amplitude of the treatment needle to the electrical control variable at the respective further control frequency.

Furthermore, also provided is a corresponding method, an ophthalmosurgical apparatus and an ophthalmosurgical system.

A capsulotomy device has a tool holder. The tool holder includes a cutting blade at its distal end and is arranged to move in a distal direction in the device to form an operative state of the device where the cutting blade projects out of a distal end of the capsulotomy device. The at least a portion of the tool holder is adapted in the device's operative state to reciprocate in the distal and proximal directions to urge rotation of the cutting blade.

Provided herein are vitrectomy instruments and related systems and methods in which example vitrectomy instruments have multiple rotating cutting edges for severing vitreous fibers. An example vitrectomy instrument may include a handle; an outer tube; and an inner tube configured to be rotated within the outer tube in multiple oscillating rotational cycles. The outer tube may include a port disposed at a distal end thereof. The inner tube may include at least first and second forward cutting edges, so that rotation in a first rotational direction results in both the first and second forward cutting edges cutting vitreous fibers drawn into the port. The inner tube may also include one or more backward cutting edges, so that rotation in a second rotational direction results in one or more backward cutting edges cutting vitreous fibers drawn into the port. Additional forward and/or backward cutting edges may be provided.

A depth detection apparatus, in particular in intracorneal dissection, provides a perforating tubular element suitable for being inserted into the cornea, a reciprocally moving air volume generator connected to the perforating tubular element, a pressure sensor for detecting the pressure along the connection between the volumetric generator and the perforating element in the reciprocal movement of the volumetric generator, a microcontroller connected to the pressure sensor to detect pressure variations with the depth advancement into the cornea of the perforating element, a signaller connected to the microcontroller to signal that a preset pressure variation has been reached. The apparatus enables a correct position to be determined for performing intracorneal dissection.

In some embodiments, a fluid dynamics system includes a solenoid valve including a valve body including ports including an inlet port and an outlet port, and a valve cavity having a direction of elongation and configured to provide fluid connectivity between respective ones of the ports, a solenoid coil disposed in the valve body around valve cavity, and a plunger comprising a permanent magnet, and configured to move back-and-forth along the direction of elongation between a first position and a second position in the valve cavity selectively controlling the fluid connectivity between respective ones of the ports, and a controller configured to apply at least one current to the solenoid coil to selectively move the plunger between the first position and the second position, and to selectively maintain the plunger in the first position and the second position.

assembly configured for removably interconnecting between the hand-held probe device and the rotating motor device. The hand-held probe device is disposable and comprises a housing having proximal and distal ends, a rotatable cutting tool extending distally from the distal end of the housing and being configured for cutting and removing tissue during rotation, and a transmission assembly passing inside the housing between the proximal and distal ends and being configured for transmitting rotational power to the rotatable cutting tool. The connection assembly is configured for engaging between the rotating motor device and the transmission assembly to thereby controllably rotate the cutting tool and remove tissue. In some embodiments, the apparatus includes a control unit for controlling operation of the apparatus, the control unit comprises an activation mechanism for activating the rotatable cutting tool, and a controller configured for operating the activation mechanism to generate a single fixed activation signal of a known intensity and duration during a predetermined time interval, thereby restricting operation of the cutting tool during the time interval to the single activation signal only.

Medical devices and methods for removing a predetermined portion of soft tissue from a target tissue layer, thereby creating a channel between two side walls of the target tissue layer, are described. The medical device is a cutting tool comprising: an elongated round body extending along a longitudinal axis and having a uniform outer cross-section at a proximal side thereof; a cutting portion at a distal side of the elongated body, comprising at a distal end thereof a cutting edge of a first cross-section being smaller than said outer cross-section, and a distally and continuously decreasing outer cross-section; and a chamber extending along the longitudinal axis inside the cutting tool from said cutting portion, the chamber having dimensions enabling storing of the removed soft tissue portion inside the chamber thereby providing a validation to the channel creation.

Systems, circuits, and methods to mitigate effects of short-term power losses in medical systems are provided. An exemplary surgical system includes a fluidics subsystem, a surgical instrument subsystem that couples to a surgical instrument and a power supply subsystem coupled to the surgical instrument subsystem. The power supply subsystem includes a main power supply connectable to AC mains to generate a voltage, a power bus connected to the main power supply, an alternate power supply, and a circuit that monitors the voltage on the power bus for powering the surgical instrument subsystem. The circuit automatically connects the power bus to the alternate power supply when the voltage drops below a reference voltage due to a power loss from the main power supply.