15 results about "Vitrectomy" patented technology

An elevation-dependent surgical pneumatic cutting system is provided. The system includes an absolute pressure sensor for sensing an ambient pressure. The system also includes a pressure drive chamber that receives pressurized air, a supply outlet supplies pressurized air to a pneumatic vitrectomy handpiece and a relief exhaust line exhausts pressurized air. A proportional relief valve is in communication with the relief exhaust line. The pressurized air is exhausted through the proportional relief valve when a supplied air pressure, sensed by a line pressure sensor, exceeds a threshold opening pressure. The threshold opening pressure and an open position are set based on feedback from the absolute pressure sensor indicative of the ambient pressure, whereby the threshold opening pressure of the proportional valve and the open position of the proportional relief valve are variable based on the sensed ambient pressure.

The invention discloses an intelligent head bracket for ophthalmologic operation. The intelligent head bracket comprises a mounting frame, a positioning rod, a head frame adapter, a bracket body, a head supporting tray, an air pressure type lifting assembly, an adjusting structure and a head fixing structure. Through cooperation of a separated expansion structure and a press-fit closed structure, intelligent distribution of air paths is achieved with the dead weight of the head of a patient as a control signal, the air paths in a pressed area are closed to form a firm bearing face, and the air paths in an unpressed neck area are smooth; by combining a multi-cavity independent fine adjustment structure, a multi-dimensional angle adjustment system and a mechanical locking type head fixing structure, personalized supporting of the head and the neck, fine hardness adjustment in an operation, multi-dimensional body position adjustment and reliable fixing are achieved. The head fixing device can adapt to patients with different head shapes / neck lengths without an electronic sensor, is high in supporting stability and good in comfort, does not interrupt the operation process during operation adjustment, and provides a reliable head fixing solution for high-precision ophthalmologic operations such as cataract and vitrectomy.

The invention discloses a calculation method for standardized statistics of the area of a retinal fibrous vascular membrane, and the method comprises the following steps: employing a same non-contact wide-angle imaging system and a same amplification factor, and taking an optic disc as a center to shoot a standard eye model reference image containing a preset model vitreous head and an eye fundus image in a patient eye operation; by taking a vitreous body cutting head as a reference, aligning the two images through Canny edge detection, minimum circumcircle positioning and Hough transform, and zooming until the contour of the vitreous body cutting head coincides; the method comprises the following steps: carrying out graying, de-noising, Otsu segmentation, connectivity screening and edge fitting on the basis of a white highlight feature of an FVM (Fiber Virtual Machine), so as to obtain an FVM contour; and overlapping the grids to count the number of the covered grids, and finally calculating the actual area of the FVM according to a formula. The invention provides an FVM area quantification calculation scheme which is uniform in reference standard, accurate in quantification and wide in application range, and provides a uniform quantification standard for comparing the FVM resection efficiency of different surgical instruments.

The invention belongs to the technical field of vitrectomy, and particularly discloses a vitrectomy sampler which comprises a holding shell and a connecting shell, the connecting shell is arranged at the upper end of the holding shell, a friction sleeve is arranged on the upper end face of the connecting shell in a penetrating mode, and a sampling needle tube is arranged in the friction sleeve in a penetrating and sliding mode. The lower end of the sampling tube and the lower end of the filling tube penetrate through the sampling needle tube and are fixed to the inner side wall of the connecting shell through a mounting plate, the sampling tube and the filling tube are arranged in the sampling needle tube, a holding pressing transmission assembly and a sampling transmission assembly are arranged in the holding shell, and a sampling barrel and a filling barrel are arranged in the connecting shell; a first piston and a second piston are arranged in the sampling barrel and the filling barrel respectively, and a staggered transmission assembly is arranged in the connecting shell and connected with the lower end of the sampling needle tube. The sampling tube and the filling tube with different lengths are arranged, so that the operation of sampling the vitreous body and filling the posterior cavity of the eyeball can be completed at one time, the operation is simple and convenient, the operation efficiency is improved, and meanwhile, the pain of a patient is reduced.

1. Name of the product in this design: Glass cutting head (statically indeterminate needle device). 2. Purpose of this design: To connect to ophthalmic vitrectomy equipment and to serve as a vitrectomy head for cutting the vitreous body and eye tissues. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design. 6. The product in this design is a long and slender item, and its length is drawn using an abbreviated method.

1. The name of the design product: ophthalmic surgical equipment. 2. The use of the design product: the design product is used for the surgical system of anterior and posterior segment of eye surgery, and ophthalmic cataract phacoemulsification and vitrectomy surgery. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention relates to ophthalmic surgical devices, systems, and methods, and in particular to a vitrectomy device having a rotating inner tube.

The invention relates to a vitrectomy system (1) comprising a pneumatically operated surgical instrument (2), a console (3) configured to provide compressed air for operating the surgical instrument (2), and at least one pneumatic line (4) connecting the surgical instrument (2) to the console (3) and through which the compressed air is provided, wherein the at least one pneumatic line (4) has a section (4-1) away from the instrument and a section (4-2) near the instrument, wherein the inner diameters (5-1, 5-2) of the sections (4-1, 4-2) of the pneumatic line (4) are the same, and wherein the outer diameter (6-1, 6-2) and / or the material damping of the two sections (4-1, 4-2) differ.

In certain embodiments, a vitrectomy handpiece is provided. The vitrectomy handpiece includes a cutting assembly and a piezoelectric stack assembly. The piezoelectric stack assembly is coupled to the cutting assembly and is configured to actuate the cutting assembly to cut vitreous of an eye.

The utility model discloses a non-contact fundus imaging wide-angle lens adapter for an operating microscope, and the adapter comprises a connecting assembly which is used for detachably installing the adapter on the operating microscope; a moving assembly; a focal length adjusting assembly; a wide-angle lens mounting assembly; the moving assembly is arranged on the connecting assembly, the moving assembly is connected with the focal length adjusting assembly, the focal length adjusting assembly is connected with the wide-angle lens mounting assembly, and the wide-angle lens can synchronously rotate and / or perform height adjustment along with the focal length adjusting assembly and can also synchronously move along with the moving assembly. The adapter provided by the utility model is strong in adaptability, and can be compatible with operation microscopes of almost all brands and models; the non-contact fundus imaging function can be achieved by adding the adapter for an old microscope and a common operating microscope, so that fundus vitrectomy can be performed, a brand-new microscope does not need to be purchased, and a large amount of cost can be saved for hospitals; the focusing and dynamic visual field adjusting functions are achieved, and a doctor can adjust the imaging focal length more smoothly in the operation process.

The invention relates to the technical field of surgical instruments, and discloses a cutting instrument and vitrectomy equipment, and the cutting instrument comprises a fastening assembly and a cutting assembly. The fastening assembly comprises a supporting piece, a connecting piece and an operating piece, a mounting cavity is defined in the operating piece, the connecting piece is connected to the operating piece, the supporting piece is connected to the side, away from the operating piece, of the connecting piece, the supporting piece is provided with a hollow structure, and the two opposite sides of the supporting piece are communicated through the hollow structure; the cutting assembly comprises a holding part and a cutting part, the cutting part is provided with a first end and a second end which are opposite, the first end is connected to the holding part, the holding part is movably arranged in the mounting cavity, and the second end penetrates through the hollow structure and is suitable for cutting the glass body; the holding piece can move in the mounting cavity relative to the operating piece so as to drive the cutting piece to move relative to the supporting piece. According to the cutting instrument, the rigidity strength of the cutting piece can be improved, and the cutting piece can be adjusted according to operation requirements. The vitreous cutting equipment with the cutting instrument also has the advantages.

In certain embodiments, a vitrectomy handpiece is provided. The vitrectomy handpiece includes a cutting assembly and a piezoelectric stack assembly. The piezoelectric stack assembly is coupled to the cutting assembly and is configured to actuate the cutting assembly to cut vitreous of an eye.

The present application concerns a novel ophthalmic device comprising a contact lens and lens carrier, wherein the lens carrier is configured to surround and hold at least a portion of the lens within an interior portion of the lens carrier. One end of the lens carrier is configured to facilitate movement of the device and another end is configured to facilitate contact between the vitrectomy lens and the eye. The lens carrier retains the vitrectomy lens within the lens carrier when the device is manipulated.

A vitrectomy probe includes a probe body and a needle portion projecting from the probe body. The needle portion includes a tube which extends at least partially in the needle portion and at least partially in the probe body. A cutter is positioned inside the tube in the needle portion. The cutter is at least partially composed of a permanently magnetic material. A field-creation unit is adapted to create an induced magnetic field, with the cutter being movable between a first position and a second position based in part on the induced magnetic field. The tube may be at least partially composed of a temporarily magnetic material. In one embodiment, the field-creation unit includes a driving magnet positioned in the probe body and adapted to selectively magnetize the tube.

The present invention relates to ophthalmic surgical devices, systems, and methods, in particular to vitrectomy device with a rotating inner tube.