Gel injection adjustable keratoplasty

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

606107, 606166, 128898, A61M 3100

Patent

active

050909550

ABSTRACT:
The present invention provides a surgical technique that allows for subtle modification of the corneal curvature by interlamellar injection of a synthetic gel at the corneal periphery while sparing the optical zone. The gel viscosity, volume and disposition within the surgical annular track as well as the diameter of the track, width, depth, and location are all parameters in the refractive change obtained. Following ultrasonic pachymetry performed centrally and at a selected wound entrance located about 2.5 to 3.5 mm from the apex, a one millimeter or so wide, about 75-85% corneal thickness depth radial incision is performed with a micrometric diamond knife adjusted to about 86% corneal thickness. Inserted through the partial-depth incision, a corkscrew-like dissector or helicoidal spatula forms a 360.degree. annular track centered about the apex. Shaped like the dissector, a modified 30 gauge needle is fully inserted in the intralamellar track and a transparent gel is manually injected while retracting the needle, thus filling the annular channel. Using a surgical keratometer mounted to an operation microscope, the final corneal power is adjusted by massaging and removing the gel as necessary.

REFERENCES:
patent: 4298004 (1981-11-01), Schachar et al.
patent: 4452235 (1984-06-01), Reynolds
patent: 4607617 (1986-08-01), Choyce
patent: 4665914 (1987-05-01), Tanne
patent: 4671276 (1987-06-01), Reynolds
patent: 4676790 (1987-06-01), Kern
patent: 4766895 (1988-08-01), Reynolds
patent: 4781187 (1988-11-01), Herrick
patent: 4834094 (1989-05-01), Patton et al.
patent: 4919151 (1990-04-01), Grubbs et al.
patent: 4961744 (1990-10-01), Kilmer et al.
patent: 4994081 (1991-02-01), Civerchia et al.
Girard, "Corneal Surgery", Advanced Techniques in Ophthalmic Microsurgery, vol. 2, pp. 149-153 (1981).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Gel injection adjustable keratoplasty does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gel injection adjustable keratoplasty, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gel injection adjustable keratoplasty will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1890051

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.