A vitrectomy needle comprises a hollow needle with a distal end for insertion into the vitreous body of an eye for performing a vitrectomy. The vitrectomy needle further comprises a laser light guide guided in the hollow needle to the distal end and has a light-emitting surface oriented towards the distal end. A cavity is formed between the light-emitting surface and the axially inward-facing surface of the distal end. In the area of the cavity, the wall of the hollow needle has an aperture extending radially with respect to the middle axis (M) of the hollow needle. The vitrectomy needle, has a straight section at the proximal end, the middle axis (M) defining a central axis (Z) in the region of the straight section. The middle axis (M) of the hollow needle may be spaced apart from the central axis (Z) by a predetermined minimum radial distance (R).

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.

In one embodiment, a phacoemulsification system includes a phacoemulsification probe including a distal end including a needle, an irrigation channel to convey irrigation fluid to the distal end, an aspiration channel to convey eye fluid and waste matter away from the distal end, wherein the aspiration channel includes a first and second section, a valve including an inlet and outlet port, the first section of the aspiration channel being coupled with the inlet port and the distal end, the second section of the aspiration channel being coupled with the outlet port, the valve being configured to selectively control fluid connectivity in the aspiration channel between the inlet port and the outlet port, and a bypass channel coupled with the irrigation channel and the second section of the aspiration channel to allow a portion of the irrigation fluid in the irrigation channel to enter the second section of the aspiration channel.

A surgical tool with a stiffening sleeve that is dynamically retractable during surgery. The tool includes a needle or implement for performing minimally invasive surgery through a pre-placed cannula at a surgical site. A stiffening sleeve of the tool about the implement may provide an added degree of stiffness such as where the implement is particularly thin. However, an end of the sleeve is held in position at the cannula as the implement advances therebeyond for the surgery. Nevertheless, as determined by the surgeon, the implement may be further advanced with a corresponding and deliberate retraction of the sleeve into the tool body as desired.

The present disclosure generally relates to a fluid-driven vitrector for vitreo-retinal procedures. The vitrector includes a first fluid pathway containing a first fluid and a second fluid pathway containing a second fluid that are completely sealed from an external environment. Because the fluid pathways are completely sealed from an external environment, an alternative fluid that can transmit pressure waves faster than air may be utilized as the first and second fluids to drive the vitrector.

An ophthalmic surgical cutting apparatus for cutting biological material including a handle, an outer tube attached to the handle and having a closed tip, a port formed in a side wall of the outer tube with a cusp formed by two or more intersecting surfaces, and an inner tube slidable within the outer tube and having a longitudinal axis and an open tip. The inner tube is in fluid communication with the handle, and the cusp of the port and the open tip interface during a cutting motion to fracture and cut biological materials and direct cut materials radially inward into the port.

A medical device having a housing, an annular fixture contained in the housing and having a central opening, a needle having a proximal end contained within the central opening of the annular fixture and a distal end protruding out of the housing, a motion assembly, which is configured to move the needle longitudinally back and forth relative to the annular fixture and the housing, and a flexible diaphragm comprising a peripheral part that seals externally around the annular fixture and an inner sleeve that seals around the proximal end of the needle, whereby movement of the needle back and forth causes the sleeve to evert and invert within the central opening while maintaining a vacuum seal between the annular fixture and the needle.

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.

Particular embodiments disclosed herein provide a rotational cutter for delaminating a membrane from a retina of an eye. The rotational cutter may comprise a first shaft and a second shaft comprising a blade portion, wherein the second shaft is coupled to a driver that is configured to at least partially rotate the second shaft relative to the first shaft, wherein rotating the second shaft rotates the blade portion for delaminating the membrane. The rotational cutter may also comprise a bottom portion configured to interface with a surface of the retina, wherein the bottom portion comprises one or more curved edges.

A pneumatic valve directs pressurized air to and air exhaust from a surgical implement, such as a dual actuation vitreous probe. The pneumatic valve includes an axially symmetric valve body configured to rotate from a first position, in which the pneumatic valve places a first port of the surgical implement in fluid communication with the pressurized air and a second port of the surgical implement in fluid communication with the air exhaust, to a second position, in which the pneumatic valve places the first port in fluid communication with the air exhaust and the second port in fluid communication with the pressurized air, and back to the first position, in one rotational direction. As such, the axially symmetric valve body continuously rotates in one rotational direction to alternate the pressurized air and the air exhaust between the two ports of the surgical implement to drive the dual actuation operation.