Thermostatically-controlled microwave used for treatment of internal tissue of the eye
US5272301A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 6, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | May 6, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A miniaturized microwave applicator comprises a thin-wall metal dielectric-filled waveguide having a thermocouple preferably disposed in a groove in the surface of the dielectric radiating aperture of the waveguide when the aperture is placed in contact with a spot on the outer surface of the conjunctiva or sclera overlying the type of given internal tissue of the eye, such as the ciliary body or chorioretinal tissue, which has a relatively high water content compared to conjunctival or scleral eye tissue. This permits cyclodestruction of the ciliary body, as a treatment for glaucoma, by heat generated by absorbed microwave energy radiated thereto during a given time. It also permits microwave heating to repair a detached retina by chorioretinal scar formation. Damage due to overheating of the tissue is prevented by the thermocouple, which monitors the conjunctival or sclera surface temperature, being used to thermostatically control the microwave energy supplied to the waveguide in a manner that the conjunctival or scleral tissue temperature is maintained substantially constant at a value below that which would cause damage thereto. The desired operation is dependent on the fact t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.