Surgery – Truss – Pad
Patent
1982-04-16
1983-11-29
Kamm, William E.
Surgery
Truss
Pad
128305, 33191, A61F 900
Patent
active
044175795
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates generally to ophthalmology and has particular reference to a device for marking out the cornea in ophthalmosurgery; the invention can find successful application in operation for elimination of astigmatism, myopia, or complex myopic astigmatism.
BACKGROUND OF THE INVENTION
A novel surgical method of treating such eye diseases as astigmatism myopia and complex myopic astigmatism has attracted much attention within the recent years. When carrying out this method the ophthalmosurgeon makes a number of non-perforating incisions in the cornea. Depending on the particular eye disease and the conditions of the patient's eye being treated, an appropriate arrangement of incisions is to be selected. In the present-day practice the surgeon has to find the required arrangement of incisions approximately and then makes the incisions.
Admittedly, the abovesaid method of making incisions in the cornea fails to provide pin-point accuracy of their arrangement both with respect to one another and relative to the optical centre of the eye and the patient's facial axis of symmetry. However, but a small inaccuracy in making incisions might lead to objectionable results for the patient operated upon, viz., distortion of the optical pathway of the light rays in the eye, which results in distorted image perceptible by the eye.
DISCLOSURE OF THE INVENTION
It is therefore a primary and essential object of the present invention to provide such a device for marking out the cornea in ophthalmosurgery that would enable the surgeon to make incisions in the cornea at a precision accuracy to suit the particular disease, thus attaining reliable results in ophthalmosurgical operations.
The aforesaid object is accomplished due to the fact that a device for marking out the cornea in ophthalmosurgery, according to the present invention, comprises a body in the form of a bush having a central hole, which accommodates a sighting aligning device, and plates provided at one of the bush ends in the planes square with the plane of the sighting device and adapted to get in contact with the cornea being marked out, while the face edges of the plates are curved and their thickness is so selected that, upon applying a preset force thereto, said edges would cause elastic non-destructive deformation of the cornea, whereas the mutual arrangement of the plates depends upon the required arrangement of incisions made during operation.
The herein-proposed invention is based upon the fact established by the inventors that plastic behaviour of the cornea makes it possible to obtain imprinted marks thereon that would persist for a lapse of time long enough to make incisions in the cornea. The present invention is advantageous in that it provides for an accurate arrangement of incisions so as to suit the nature of the eye disease the patient suffers from and hence the operation involved. With a set of such devices at hand the surgeon is in a position of selecting a required device, wherein the plates are arranged in a pattern necessary for performing a given operation.
In one of the embodiments of the device adapted for surgical treatment of myopia the plates are spaced apart at a constant angular pitch along the circumference of the bush end and, to provide an adequate illumination in the case where the plates are held to the bush end flange, a number of through holes are made in the flange from inside.
For other types of surgical interventions the plates are arranged in groups, the mutual arrangement of the plates in the group and that of the groups of plates being dependent upon the nature of the operation performed.
It is expedient to provide a drum inside the bush coaxially therewith, said drum being mounted with a possibility of being swivelled and locked in a required position and having a through hole accommodating a sighting device, as well as a means to read the drum angular position.
Such a constructional arrangement provides for correct orienting of the entire device with respect to the optica
REFERENCES:
patent: 3502070 (1970-03-01), Bliss
patent: 4205682 (1980-06-01), Crock et al.
A. Toufexis "Shaping up the Blurry Eye" Time Sep. 22, 1980 p. 51.
Durnev, deceased Valery V.
Fedorov Svyatoslav N.
Osetsky Vitaly P.
Soloviev Sergei A.
Kamm William E.
Moskovsky Nauchno-Issledovatelsky Institut Mikrokhirurgii Glaza
Shein Mitchell J.
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