Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Television

Apparatus-and-method-for-cryopreparing-corneal-tissue-for-surgical-procedures

Divisional operation system for obtaining a quotient by repeated subtraction and shift operations

An object of this invention is to provide a divisional operation system which has saved an extra ...

Image pickup apparatus with white balance control

This invention is made in view of the above stated problem of the prior art. It is therefore a ...

Door jamb switch

In accordance with the present invention then, there is provided an improvement in electrical ...

***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***

Description:...

Secure communication system

The present invention is embodied in a secure communication system consisting of a message source ...

Receiving apparatus for receiving a BS-IF signal converted into a superhigh band or UHF band

We claim: 1. A receiving apparatus comprising: an input terminal for receiving an input signal ...

Data transmitting equipment

What is claimed is: 1. Data transmission equipment for transmitting data between a local equipment ...

Bidirectional digital serial interface for communication digital signals including digitized audio between microprocessor-based control and transceiver units of two-way radio communications equipment

It is a primary objective of this invention to provide a new digital interface system for ...

Data processing method and apparatus for calculating a multiplicatively inverted element of a finite field

I claim: 1. A method for calculating a multiplicative inverse of an input element of a finite, ...

Swimmer's wallet

The present invention provides a lightweight and economical waterproof wallet suitable for use by a ...

Apparatus and method for cryopreparing corneal tissue for surgical procedures

Details

Inventors: Linner, John G.; Goosey, John D.;
Assignee: Board of Regents, The University of Texas System (Austin, TX)
Primary Examiner: Peshock; Robert
Assistant Examiner: Contreras; Wenceslao J.
Attorney, Agent or Firm: Arnold, White & Durkee

This invention relates to apparatus and the method for preparing corneal tissue for surgical graft, implantation or transplantation referred to herein as "surgical techniques" or "surgical procedures." Use of the apparatus and method for preparing the corneal tissue avoids significant modification of the ultrastructure of corneal tissue during preparation of the tissue samples themselves.

DETAILED DESCRIPTION What is claimed is: 1.
A method for cryopreparing corneal tissue for use in surgical procedures comprising: (a) obtaining a corneal tissue sample and sizing said tissue sample for its intended end use; (b) vitrifying said corneal tissue sample; (c) bringing said vitrified corneal tissue sample to equilibrium at a temperature of less than -140.
degree.
C.
; and (d) dehydrating said vitrified corneal tissue sample while said sample is maintained in a state of equilibrium.
2.
The method of claim 1 further comprising the step of sealing said dehydrated corneal tissue sample in a container, the atmosphere surrounding said sample in said container including a substantial portion of an inert gas.
3.
The method of claim 2 further comprising the step of rehydrating sid dehydrated corneal tissue sample.
4.
The method of claim 1 wherein said corneal tissue sample is vitrified in less than one second.
5.
The method of claim 1 wherein said dehydration is by means of sublimation.
6.
The method of claim 1 wherein said vitrified corneal tissue sample is dehydrated under vacuum.
7.
The method of claim 6 wherein said vacuum reaches from 1.
times.
10.
sup.
-8 Torr to 1.
times.
10.
sup.
-10 Torr.
8.
The method of claim 1 wherein said corneal tissue sample is characterized by an average diameter of from 3 to 11 millimeters.
9.
The method of claim 8 wherein said corneal tissue sample is characterized by an average thickness of from 0.
1 to 1.
0 millimeters.
10.
A method for cryopreparing corneal tissue for use in surgical procedures comprising: (a) obtaining a corneal tissue sample, said sample being characterized by an average diameter of from 3 to 11 millimeters and an average thickness of from 0.
1 to 1.
0 millimeters; (b) vitrifying said corneal tissue sample in less than one second; (c) bringing said vitrified corneal tissue sample to equilibrium at a temperature of less than -140.
degree.
C.
; and (d) dehydrating said vitrified corneal tissue sample by sublimation and under vacuum while said corneal tissue sample is maintained in a state of equilibrium

Related patents

	Dynamic shading compensation for IR tracking system OF THE INVENTION A conventional IR tracking system is commonly known as a FLIR system. This type of system is typically fabricated with a common module which ...
	Automatic contrast and brightness control system for thermal image apparatus integrated into an aircraft It is an object of the invention to improve the automatic contrast and brightness control for thermal image apparatus of aircraft during roll movements of the aircraft. T...
	Method and apparatus for scrambling a television signal The present invention relates to a television signal scrambling method and apparatus which employ a scrambler for scrambling a television signal and a descrambler for ...
	Laser spot projector It is therefore an object of the present invention to provide a laser spot projector capable of easily adjusting the magnification of the laser spot projected on the ...
	Pulsatile drug delivery device using stimuli sensitive hydrogel It is an object of the present invention to provide a delivery system which enables the effective delivery of drugs entrained within a hydrogel, via a squeezing ...
	Method for making late programmable read-only memory devices It is, therefore, an object of this invention to provide a method of programming a ROM late in its manufacturing method without large ROMs needing expansion in size to ...
	Method of fabricating trench cell capacitors on a semocondcutor substrate It is hence a primary object of this invention to present a method of fabricating a trench cell capacitor with high aspect ratio precisely. It is a second object of this ...
	Mouth held switch assembly This invention is concerned with a mouth held electrical switch assembly and more particularly with an electrical switch assembly that can be actuated only by a clamping ...
	Blood lancet I claim: 1. A relatively flat blood lancet, having a handle portion and a tip portion having sharp edges, which portions are made of plastic in one piece, comprising: a ...
	Signaling system What is claimed is: 1. In a speech privacy transmission system, means for analyzing speech currents into component frequency band currents in a plurality of separate ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved