Intra-ocular pressure apparatus
US4909783A · kind A · utility
Inventor
Key dates
| Filing date | Oct 14, 1987 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Oct 14, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00736
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for maintaining intra-ocular pressure while simultaneously removing and replacing fluid in a patient's eye, for example, during cataract surgery, includes a pair of cooperating expansible bodies connected via fluid conduits to the eye. The expansible bodies may be piston/cylinder assemblies such as syringes. The plungers and/or the barrels of the syringes are mechanically linked together for equal and opposite operation of the two syringes, whereby input and output flow are precisely equal. The syringes are preferably placed back to back along a common axis. The barrels are rigidly spaced and a drive means is applied between the spaced barrels and the endwise-connected plungers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.