Delivery apparatus and method for treatment of intralenticular cataracts with exogenous enzymes
US4135516A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1977 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Feb 24, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/0612
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An enzymatic intralenticular cataract treatment method for removal of nuclear cortical and subcapsular regions of the cataractous lens through enzymatic digestion thereof, which comprises introduction of a concentrated solution of proteinase into the nuclear and cortical regions of a cataractous lens by way of a cannula inserted through a very tiny incision in the cornea and puncture opening into the lens capsule, leaving all other structures within the eye intact, after which a gas bubble is introduced from the cannula into the lens, the gas bubble serving to maintain the enzyme compartmentalized within the subcapsular region. As illustrated in FIG. 4, a preferred embodiment of the apparatus involved with the method comprises an enzyme reservoir connected through a delivery means and a four port, two channel valve to a cannula. The cannula is filled with enzyme solution then the delivery means and valve are operated by the surgeon so as to carry out the above described treatment method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.