FIELD: ophthalmology.
SUBSTANCE: device can be used for restoration of vision at dislocation of optical media of eyeball. Tip of device for destructing and moving internal media of eyeball away can be controlled from pedal board. Tip has to be three removable tubes, which are inserted into each other and connected by means of handle and hoses with low- and high-pressure hydrodynamic systems. There is vacuum system and electromagnet drive inside the device. External and central tubes of tip are motionless, and internal tube is capable of moving. Internal tube is made for simultaneous longitudinal reciprocal and rotational left-hand or right-hand shift. Two windows for supplying fluid from low-pressure system to eye cavity are disposed at proximal (approached to eye) end of external tube; the windows are disposed diametrically opposite. Edges of external and central tubes are dulled and are cur in perpendicular or aslant congruent. Edge of internal tube is provided with knives, which follow profile of tube and/or are bent longitudinal or/and lateral. Handle is dismountable and it is made of hard and physical and chemical treatment resistant materials. External, central and internal tubes, front and back bushing of handle, cams and rod re made of hard physical and chemical treatment resistant materials as well as of materials being friction resistant; materials are capable of slight extending at heating. Central part of tube is provided with external thread or with front ring-shaped groove. Washer, made of elastic-resilient material, is disposed for making thread or valve fixing to front bushing of handle. Polygonal pad is made for spanner in front of thread for or for flange for fork-extractor. Distal part of tube is provided with two back ring-shaped grooves. Each groove communicates through original opening with space of tube for feeding fluid from low- and high-pressure systems of device. Internal and external surfaces of tubes are made smooth. Internal diameter of any external tube corresponds strictly to external diameter of any internal tube to prevent overflow of fluids from low- and high-pressure systems into each other. Two narrow and wide longitudinal faces are disposed diametrically opposite at external surface of central tube, which faces do not reach proximal end of tube. Flange is disposed at distal end. Flange serves for removing tube and for resting against external tube; flange is provided with split pin. Splint pin prevents central tube from barring. Faces form channels at conjugation of external and central tubes. Along channels the fluid is supplied from low- and high-pressure hydrodynamic systems. Narrow channels by means of one or two openings at proximal end of faces communicate with space of central tube for supplying fluid from high-pressure system. Wide channels by means of side openings of external tube, which openings are disposed at projection of proximal ends of faces, communicate with eyeball cavity for supplying fluid from low-pressure system. Edge of internal tube is aslant cut and is provided with one or two diametrically opposite knives. Cavity of internal tube communicates with cavity of handle. Cavity of handle serves as vacuum chamber. Distal edge of internal tube is made in form of cone to be put on shaft. Tube is made in such a manner that as the tube the standard single use injection needles can be used as that. Internal tube goes through cams. Cams are fixed at distal end front bushing of handle and they provide reciprocal motion of tube. Shaft is made hollow at distal and proximal ends. Front cavity of shaft communicates with cavity of handle through side openings to provide removal of fluid from internal tube. There is rod disposed in back cavity. Return spring is fastened to proximal end of rod. Rod goes through back bushing of handle. Contact surfaces of rod and bushing are ground one to the other to provide liquid-proof connection.. Bushing is provided with ring-shaped groove from outside. Elastic resilient ring is placed into groove. Ring provides waterproof connection of bushing to handle. Handle is made in form of hollow cylinder, made of two tubes ground one to the other. Two longitudinal grooves are made onto external surface of internal tube. Grooves end up with proximal openings which openings coincided with openings of front bushing and which communicate with back ring-shaped grooves of external tube. Distal ends of grooves communicate with connecting pipe through openings in external tube; connecting pipes are used for supplying fluid from low- and high-pressure hydrodynamic systems of devices. Cavity pf handle communicates at its back part with split rod of vacuum system of device. Electromagnet wire is attached to distal end of handle.
EFFECT: reduced traumatism; shortened time of procedure; reduced risk of infection; reduced operation cost.
2 cl, 3 dwg
