Donald Sanders

US Patent:

41381912, Feb 6, 1979

Filed:

Apr 4, 1977

Appl. No.:

5/784039

Inventors:

Gholam A. Peyman - Oak Park IL
Jeffrey E. Koziol - Oak Park IL
Walter I. Fried - Chicago IL
Donald R. Sanders - Skokie IL

International Classification:

G02B 2122
G02B 2136

US Classification:

350 19

Abstract:

A combined operating microscope and illumination system having a coaxial and/or par focal light source for illumination for precise instrumentation during intraocular and other operating procedures. Stereoscopic view for a surgeon and an assistant is provided with an alternatively selective light diverting system in the assistant's light system for photographic purposes. Coaxial and par focal slit illumination are achieved by a light source movable on an arc shaped tract without reflecting light through the surgeon's lens system thereby permitting additional space for a second light system to the assistant without reducing that available to the surgeon.

US Patent:

46230025, Nov 18, 1986

Filed:

Mar 25, 1985

Appl. No.:

6/715630

Inventors:

Kevin G. Schoonover - Atlanta GA
Donald S. Sanders - Norcross GA

Assignee:

Steam Systems and Services Incorporated - Atlanta GA

International Classification:

F16K 4900
F16K 11044
F16K 106

US Classification:

13762548

Abstract:

A valve for controlling or diverting the flow of relatively viscous flowable materials such as polymers or the like. The valve includes a valve plug mounted for longitudinal movement within a valve chamber which receives the flowable material. A pair of antechambers flank the valve chamber, and a pair of portals connect the valve chamber with each antechamber. The valve plug selectably blocks one or the other of these portals, depending on the longitudinal position of the valve plug. A wall of each antechamber is angled to divert incoming flowable material toward the outflow passages individually leading away from the antechambers.

US Patent:

42384826, Dec 9, 1980

Filed:

Sep 29, 1978

Appl. No.:

5/947225

Inventors:

Gholam A. Peyman - Chicago IL
Donald R. Sanders - Skokie IL

International Classification:

A61K 31735
C08B 3702

US Classification:

424180

Abstract:

Improved fluid for intraocular infusion and irrigation and methods of preparation and use. The fluid is an aqueous physiologic saline solution containing from 2-15% by weight of an artificial, substantially non-antigenic oncotic agent of a colloid type, such as dextran having an average molecular weight in the range of from about 1,000 to 40,000. The solution also contains NaCl, CaCl. sub. 2, dextrose and sodium bicarbonate, and is adjusted to have an osmolarity in the range of 260-400 mOsm/L and a pH in the range of from about 7 to 7. 8. The solution may be used as a replacement fluid for the aqueous or vitreous humor, for the reestablishment of intraocular pressure during or after surgery, as an irrigating fluid during phacoemulsification, and generally for external eye surface rinsing during cataract surgery. The solution results in improved lens maintenance and corneal endothelial function during procedures such as vitrectomy, irrigation and aspiration of cataracts, and in phacoemulsification. Improvement is demonstrated, for example, by reduced corneal endothelial decompensation (inhibition of osmotic corneal swelling), by reduced water and sodium gain, by reduced potassium loss, and by recovery of the lens' ability to reverse electrolyte imbalances due to stress of the type typical of surgery, diabetes, ageing, and physical, chemical or biochemical trauma.