Ocular treatment
First Claim
1. An improved method of administering an ophthalmically active formulation to the corneal surface of an eye, said improvement essentially comprising the steps of:
- providing a nozzle having an outlet adjacent an electrode, which electrode is spaced from said outlet and electrically insulated from said nozzle;
providing as said formulation a liquid mixture comprised of an ophthalmically active substance and an ophthalmically acceptable diluent;
placing said nozzle outlet and adjacent electrode in proximity to, but spaced from, said corneal surface;
causing a measured unit dose of up to 20 μ
l of said formulation to flow from said nozzle outlet simultaneously with applying to said formulation an electrical potential by means of a high voltage generator while maintaining said electrode at relative ground potential, said electrical potential being sufficiently large to atomize said formulation leaving said nozzle outlet into a spray of electrically charged droplets;
whereupon said electrically charged droplets of said formulation are drawn to said corneal surface and uniformly deposited thereover.
0 Assignments
0 Petitions
Accused Products
Abstract
A method of administering less than 20 μl of a solution of an ophthalmically effective substance to the eye characterized in that the formulation has a viscosity and resistivity which makes it suitable for electrodynamic spraying, and the formulation is supplied to a spray nozzle wherein a sufficiently large electrical potential, relative to earth, is applied to the formulation that a sufficient electrical gradient is provided at the spray nozzle to atomize the formulation as a spray of electrically charged droplets. Also liquid solution formulations of ophthalmically effective substances for use in the method of the invention; and electrodynamic spraying apparatus, convenient for hand held use, for use in the method of the invention.
-
Citations
10 Claims
-
1. An improved method of administering an ophthalmically active formulation to the corneal surface of an eye, said improvement essentially comprising the steps of:
-
providing a nozzle having an outlet adjacent an electrode, which electrode is spaced from said outlet and electrically insulated from said nozzle; providing as said formulation a liquid mixture comprised of an ophthalmically active substance and an ophthalmically acceptable diluent; placing said nozzle outlet and adjacent electrode in proximity to, but spaced from, said corneal surface; causing a measured unit dose of up to 20 μ
l of said formulation to flow from said nozzle outlet simultaneously with applying to said formulation an electrical potential by means of a high voltage generator while maintaining said electrode at relative ground potential, said electrical potential being sufficiently large to atomize said formulation leaving said nozzle outlet into a spray of electrically charged droplets;whereupon said electrically charged droplets of said formulation are drawn to said corneal surface and uniformly deposited thereover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification