Reciprocation vitreous suction cutter head
US4108182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Feb 16, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/320028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical instrument comprising a housing with a motor and source of power contained in the housing. A removable sheath is placed over the housing and a cutter assembly is removably mounted to the housing so that the housing is protected from external materials and contamination. The cutter assembly has a body, a tube projecting from the body, a reciprocating blade positioned in the tube and a cam drive transfer mechanism mounted in the cutter body which transmits motion to the blade from the motor shaft. The tube defines an aperture in its side and the blade as it reciprocates in combination with the walls defining the aperture shears vitreous material entering the hole. A second passage is formed in the cutter body communicating with the tube to allow pressure differentials to be exerted to the tube. The cutter head and removable protective sheath are replaced after each successive operation in order to eliminate patient-to-patient cross contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.