Disclosed herein is a medical device. The medical device includes an outer tubular member and an inner tubular member. The outer tubular member has a distal end, an open window disposed at the distal end, and one or more dimples. The inner tubular member has a distal tip and one or more axial grooves. The inner tubular member is configured to be received within the outer tubular member. The one or more axial grooves and the one or more dimples are configured to align the distal tip of the inner tubular member with the open window of the outer tubular member. The open window of the outer tubular member and the distal tip of the inner tubular member are configured to cut tissue.

The present invention relates to a device for fracturing and removing ocular lenses. The device mainly comprises a rotational screw drill, a sleeve and a hydraulic suction system. The rotational screw drill has reversed conical propellers which help to grind the particles. The rotational screw drill is housed in a sleeve, which comprises a rigid cylinder and a suction cup. The suction cup has a bell or funnel shape with an elliptical cross-section. Finally, the hydraulic suction system is key for the present invention performance. Also, the invention relates to a method comprising the steps of breaking, splitting the cataract or lens tissue and simultaneously or subsequently grinding the particles inside the sleeve by means of the rotational screw drill and the sleeve, and finally removing them from the medium via the sleeve by means of a hydraulic suction system.

A device for extracting lens material from an eye including a distal, disposable portion releasably coupleable to a proximal, reusable portion. The disposable portion includes a cutting tube having a distal cutting tip and an inner lumen having an open distal end. The disposable portion includes an aspiration pump fluidly coupled to the inner lumen of the cutting tube and a cutting tube drive mechanism configured to oscillate the cutting tube. The reusable portion includes an aspiration pump motor configured to drive the aspiration pump and a coupler for releasably operatively coupling the pump motor to the aspiration pump. Related devices, systems, and methods are disclosed.

In some embodiments, a vitrectomy probe may include an inner cutting tube reciprocating in an outer tube. The outer tube includes a side port and the inner tube includes a distal cutting port, and, in some embodiments, an additional side port. In some embodiments, the inner tube may also include a flat upper edge that cuts across the outer tube side port. In some embodiments, a diaphragm drives the inner tube and may have an open-stroke side with a lower hardness material than a closed-stroke side. In some embodiments, an aspiration tube coupled to the vitrectomy probe may include a first aspiration tubing and a second aspiration tubing with a lower hardness than the first aspiration tubing. In some embodiments, the vitrectomy probe may be coupled to pneumatic tubing that is stepped or tapered.

A handheld reciprocating surgical tool may contain an inertial damper to counteract the momentum of a diaphragm assembly of the reciprocating surgical tool. A momentum of the inertial damper may be tuned such that the momentum of the inertial damper is comparable in magnitude and opposite in direction to a momentum of the diaphragm assembly. The diaphragm assembly may include a cutting tool. The combined momentum of a diaphragm assembly and the inertial damper may result in a reduced net momentum, which may reduce vibration of the reciprocating surgical tool haptically experienced by a surgeon, thereby improving surgeon comfort.

Systems, apparatuses, and methods of and for an ophthalmic surgical system are disclosed. An ophthalmic surgical system may include a vitreous probe having a housing sized and shaped for grasping by a user. The vitreous probe may also include a cutter extending from the housing and being sized to penetrate and treat a patient eye. The cutter may include an outer cutting tube coupled to the housing. The outer cutting tube may have an outer port formed at a distal end wall of the outer cutting tube and configured to receive tissue. The cutter may include a rotatable inner cutting member disposed within the outer cutting tube. The inner cutting member may include a first cutting surface that rotates across the outer port to cut the tissue when the inner cutting member is rotated.

A system for preparation of an implant and ab interno insertion of the implant into an eye including a handle having one or more actuators and an elongated shaft having an outer sheath and an elongate member positioned within a lumen of the tubular outer sheath. The system includes a recess sized for holding a patch of material fixed relative to the handle and a cutting member movable relative to the handle and to the recess. The cutting member cuts the patch of material into an implant as the cutting member moves towards a cutting configuration. The implant, once cut, is axially aligned with the lumen of the tubular outer sheath. The inner elongate member is movable relative to the tubular outer sheath to advance the implant into a deployment position in the lumen of the tubular outer sheath for delivery into the eye. Related devices and methods are provided.

An exemplary surgical device includes a shaft with a lumen defined therethrough and an element movable from a stored position to a deployed position in which a larger portion of the element extends out of the distal end of the lumen; wherein motion from the stored position to the deployed position causes a first leg of the element to advance distally relative to the distal end of the shaft, and causes a second leg of the element to move proximally relative to the distal end of the shaft.

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.

Various membrane delamination devices for removing proliferative membranes from underling tissues are disclosed herein. In some implementations, the delamination device may include a first shearing part and a second shearing part. One of the first shearing part and the second shearing part may be moveable relative to the other of the first shearing part and the second shearing part. One or more of the shearing parts may include a plurality of teeth formed at a leading edge thereof. A shearing action produced by operation of the shearing parts may be used to sever fibers joining proliferative membranes from an underlying tissue.