Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1985-06-19
1987-03-17
Croyle, Carlton R.
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
128305, A61B 1732
Patent
active
046504605
ABSTRACT:
An electro-pneumatic module is provided that permits the gradual control of the level of air pressure pulses injected into pneumatic vitrectomy probes used in intraocular microsurgical procedures. This invention permits the interchangeable use of the different pneumatic probe models according to their working pressure. The module generates in an alternating mode a flow of air pressure that can be varied from 0 to 30 p.s.i. or more, intercalated with a vacuum flow. This alternate air pulse is blown in a variable frequency of 0 to 800 times per minute into the piston of vitrectomy probes, moving in this way the internal cutting needle back and forth. The module contains also an gradually adjustable aspirating system responsible for sucking out the material sectioned by the chopping action of the internal needle.
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Croyle Carlton R.
Olds Theodore
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