Abstract:
A surgical system that is able to sense the onset of an occlusion or other surgical event as well as the instant an occlusion breaks. To help avoid overheating of the tip, the system deterines a temperature of an eye using irrigation flow rate and reduces the power to the handpiece automatically if an overheating situation is predicted. Alternatively or in addition, the system monitors the power drawn by the handpiece, which is indicative of the cutting load on the tip, and automatically adjusts the power or stroke of the tip to compensate for increased loads on the tip.
Abstract:
Various systems, processes, and computer program products may be used to perform retinal laser surgery. In particular implementations, systems, processes, and computer program products may include the ability to identify retina blood vessels from retina image and determine a retina location needing therapy and not substantially intersecting a retina blood vessel. The system, processes, and computer program products may also include the ability to generate a command to activate a retina laser when a beam from the retinal laser will be aligned with the therapeutic location.
Abstract:
A control system for managing power supplied to a phacoemulsification hand piece includes a power source that provides power to the hand piece and a controller that controls the power source. The controller calculates a thermal value based on irrigation fluid flow and a power level and decreases the power level in proportion to the calculated thermal value when the calculated thermal value exceeds a threshold thermal value. Irrigation fluid flow can be calculated from irrigation fluid pressure.
Abstract:
In various embodiments, a phacoemulsification cutting tip with a straight shaft and an angled portion off of the straight shaft may include a hook on the angled portion to move an axis of rotation of the cutting tip closer to alignment with an extended centerline of the shaft. The cutting tip may be configured to torsionally rotate back and forth on an axis perpendicular to a centerline of the shaft (e.g., rotation around a y-axis). In some embodiments, lateral vibrations (e.g., side to side along an x-axis or z-axis perpendicular to the y-axis) that result from torsional rotation around the y-axis in a cutting tip without the hook may be reduced through use of the hook to balance the otherwise eccentrically weighted hook.
Abstract:
An intraocular lens injection device comprises a tubular housing (125, 610, 710, 810) with a passageway extending along its longitudinal axis and a plunger shaft (105, 620, 720, 820) disposed within and movable along the passageway. The tubular housing and the plunger shaft have frictional engaging features that are configured to produce a varying plunging friction as the plunger is moved along its operating range, to offset changes in the plunging resistance that arise from injecting the IOL into the eye. The variable plunging friction may comprise one or more step changes in unloaded plunging friction, or a curved variation in plunging friction, or both, along at least a portion of the operating range of the plunger shaft. In some embodiments, a slot (640) of varying width in the housing frictionally engages a tab (630) extending transversely from the plunger shaft. In others, a contoured surface on the plunger shaft frictionally engages an orifice (730, 830) in the tubular housing.
Abstract:
Proper selection and centering of an intraocular lens (IOL) is provided. An image of an eye, which may be captured during pre-operative tests and provided to a program operable to calculate the power and axis orientation of the IOL, is used to determine the location and orientation of the IOL. This produces an output or placement guide used to properly center and orient an IOL within the eye.
Abstract:
Sistema de suministro de lente intraocular (1100, 1600, 1700, 1800, 1900) que comprende: una pieza de mano (100) que comprende un cuerpo (125) y un émbolo (110, 1105) adaptado para producir un movimiento en vaivén en el cuerpo; un cartucho (150) que comprende una cámara (155) en el cartucho y una boquilla (160, 1130) sobre un extremo distal del cartucho, estando adaptada la cámara para contener una lente intraocular, presentando la boquilla un interior hueco (1125) conectado a la cámara, estando adaptado el cartucho para encajar en la pieza de mano; un calentador (505, 705, 905, 1305, 1310) para calentar la lente intraocular; caracterizado porque presenta un indicador adaptado para proporcionar una indicación visual (2140, 2260) de que la lente intraocular se ha calentado a un intervalo de temperatura deseado para su inyección.
Abstract:
An irrigation/aspiration tip having a shaft with a reduced or relatively small diameter with a distal tip having a relatively large diameter. The diameter of the shaft can vary depending upon the incision size preferred by the surgeon, and the diameter of the distal tip will vary depending upon the size of the phacoemulsification tip preferred by the surgeon.
Abstract:
A surgical system that is able to sense the onset of an occlusion or other surgical event as well as the instant an occlusion breaks. To help avoid overheating of the tip, the system deterines a temperature of an eye using irrigation flow rate and reduces the power to the handpiece automatically if an overheating situation is predicted. Alternatively or in addition, the system monitors the power drawn by the handpiece, which is indicative of the cutting load on the tip, and automatically adjusts the power or stroke of the tip to compensate for increased loads on the tip.