Ophthalmological procedures
First Claim
1. In a method for protecting delicate human eye structures during ophthalmological surgical procedures by introducing into the anterior segment thereof a given volume of highly viscous physiologically buffered solution containing a sufficient concentration of sodium hyaluronate to protect delicate eye tissue, cells and structures, the improvement comprising diluting said volume in site thereby reducing the concentration thereof prior to closure such that abnormally high post-operative intra-ocular pressure within the human eye is avoided.
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Reexamination
Accused Products
Abstract
This disclosure is directed to improved opthalmological surgical procedures on the human eyeball characterized by initially utilizing ultra-pure hyaluronic acid in the form of a solution containing the sodium salt thereof, in a sufficient concentration thereof to protect delicate eye tissue and cells, e.g., 0.5 to 1.0 wt. % and higher, and thereafter, significantly diluting the concentration thereof in the aqueous media (natural and/or synthetic) within the anterior segment of the eye viz, in situ, so as to arrive at a concentration of said sodium salt of hyaluronic acid of less than 0.5 wt. % and more usually from about 0.1 to about 0.3 wt. % prior to closure. Hence a significant dilution from the initial higher concentrations by a factor of at least about 2:1 and more usually from about 3:1 to about 10:1 is effected. Hence the concentration of said sodium hyaluronate in the natural and/or synthetic aqueous media left within the eyeball at the surgical site after closure of the procedure ranges from about 0.1 to about 0.3 wt. % in the anterior chamber.
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21 Claims
- 1. In a method for protecting delicate human eye structures during ophthalmological surgical procedures by introducing into the anterior segment thereof a given volume of highly viscous physiologically buffered solution containing a sufficient concentration of sodium hyaluronate to protect delicate eye tissue, cells and structures, the improvement comprising diluting said volume in site thereby reducing the concentration thereof prior to closure such that abnormally high post-operative intra-ocular pressure within the human eye is avoided.
Specification