Limited Reuse Assembly For Ophthalmic Injection Device
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a technology of ophthalmic injection device and assembly, which is applied in the direction of contraceptive device, eye treatment, surgery, etc., can solve the problems of affecting the accuracy of volume injection
Inactive Publication Date: 2007-11-22
ALCON RES LTD
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The volume injected is typically not controlled in an accurate manner because the vernier on the syringe is not precise relative to the small injection volume.
Fluid flow rates are uncontrolled.
Reading the vernier is also subject to parallax error.
Tissue damage may occur due to an “unsteady” injection.
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[0033] Reference is now made in detail to the exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like parts.
[0034]FIG. 2 is one view of an ophthalmic medical device including a disposable tip segment and a limited reuse assembly according to an embodiment of the present invention. In FIG. 2, the medical device includes a tip segment 205 and a limited reuse assembly 250. The tip segment 205 includes a needle 210, a housing 215, and an optional light 275. The limited reuse assembly 250 includes a housing 255, a switch 270, a lock mechanism 265, and a threaded portion 260.
[0035] Tip segment 205 is capable of being connected to and removed from limited reuse assembly 250. In this embodiment, tip segment 205 has a threaded portion on an interior surface of housing 215 that screws onto the threaded portion 260 of limited reuse assemb...
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Abstract
A limited reuse assembly for an ophthalmic medical device has an actuator with a shaft, a power source for providing power to the actuator, a controller for controlling the actuator, a mechanical linkage interface, and a housing. The mechanical linkage interface is coupled to the actuator shaft and has a mating surface on one end. The housing at least partially encloses the power source, the controller, and the actuator. The limited reuse assembly is attachable to and removable from a disposable injection device.
Description
RELATED APPLICATIONS [0001] This application is a continuation-in-part of U.S. patent application Ser. No. 11 / 581,629 filed Oct. 16, 2006, U.S. patent application Ser. No. 11 / 581,630 filed Oct. 16, 2006, U.S. patent application Ser. No. 11 / 581,591 filed Oct. 16, 2006, and U.S. patent application Ser. No. 11 / 435,906 filed May 17, 2006.BACKGROUND OF THE INVENTION [0002] The present invention relates to a single-use medical device and more particularly to a two-piece ophthalmic drug delivery device with a disposable tip end containing an improved plunger linkage and seal. [0003] Several diseases and conditions of the posterior segment of the eye threaten vision. Age related macular degeneration (ARMD), choroidal neovascularization (CNV), retinopathies (e.g., diabetic retinopathy, vitreoretinopathy), retinitis (e.g., cytomegalovirus (CMV) retinitis), uveitis, macular edema, glaucoma, and neuropathies are several examples. [0004] These, and other diseases, can be treated by injecting a d...
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Patent Type & Authority Applications(United States)
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