• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU1019993A3
    申请号:SU792775402
    申请日:1979-06-08
    公开日:1983-05-23
    发明作者:Сильви Арон-Роза Даниель；Габриель Роберт Гризерман Мишель
    申请人:Daniel Silvi Aron Roza；Mishel Gabriel Robert Grizerma；
    IPC主号:
    专利说明:

    with
    with
    with
    o The invention relates to a medical technique, namely, ophthalmology, and can be used for surgical purposes. A device for ophthalmic surgery is known, which contains a laser and a system for supplying laser radiation to the surgical field I. However, this device does not allow operations on tissues that do not contain photoacceptors. The device for dissecting tissues in ophthalmic surgery, comprising a pulsed laser, a helium neon laser, a laser radiation supply system to the surgical field and a 2J slit lamp, is closest to the invention by its technical essence and the achieved positive effect. However, the known device cuts the eye tissue in such a way that scars are subsequently formed. The aim of the invention is to prevent the formation of scars when the tissue is dissected. The goal is achieved by the fact that a device for dissecting tissues in ophthalmologic surgery, comprising a pulsed laser, a helium-neon laser, a system for supplying laser radiation to the surgical field and a slit lamp, is equipped with a focusing system in the form of an achromatic doublet placed on the slit lamp axis, the Fabri-Perrot standard, a cuvette with a mirror and a shutter, while a laser on a yttrium-aluminum garnet with a neodymium additive, installed between the Fab standard, serves as a pulsed laser ri-pero and obturator. In addition, the device is equipped with an optical system that serves to expand the beam and is installed between a helium-neon laser and a cuvette. At the same time, the device also contains a Pokkel cell with a QDR crystal mounted on the output of a pulsed laser. The drawing shows a schematic diagram of the device. The device for dissecting tissues in ophthalmic surgery contains a helium-neon laser 1, a pulsed laser 2, which is a laser on a yttrium-aluminum garnet with a neodymium additive, installed between the FabriPerror 3 standard and the obturator consisting of a glass plate absorbing infrared radiation, but transmitting an alignment beam from the helium laser 1. The cuvette 5 with a mirror and a saturable absorbing solution and an optical system 6 are installed between the obturator k and the helium-neon laser 1, To expand the beam of an alignment helium-neon laser 1 so that its focus is matched with the focus of a pulsed laser | 2 The device also contains an electron-optical device 7 allowing only a sequence of pulses emitted by a pulsed laser 2 to be passed through, and a Pokkel cell 8 with a CDG crystal, which converts the emitted wavelength Q6kS to wavelength 5822, FOR. The ray of the beam; S. Guerrillas to the slit ophthalmic lamp 9 through the hollow crankshaft 10, inside which the mirrors reflect the beam, bring it to the slit lamp 9. The slit lamp 9 is equipped with an optical focusing system 11, made in the form of an achromatic doublet that allows you to collect the beam laser at the operating point. The slit lamp is also provided with a plate 12 placed on the optical axis of the visible tube 13, which makes it possible to see the alignment beam, preventing the operator's eyes from possible reflection of the operating beam. The footswitch I controls the opening of the obturator A, leaving it free to aim the operator's hand. When the obturator is open, the pulsed laser 2, which is switched off at a frequency of 1-0.3 Hz, emits a sequence of pulses used for surgery; the electric system prohibits the emission of a new sequence by forcibly closing the obturator A. To obtain a new shot, a new pedal is required. The device works as follows. When operating with a pulsed laser 2, the latter emits pulses of infrared radiation with a wavelength A which are in the form of a train or sequence of peaks with a duration of 20-30 PS, separated by gaps
    6 NS.
    The energy contained in this sequence of peaks at the exit of the laser emitter is 10–15 meq. This type of radiation is provided by operating in the locking mode (mode locking) of the radiator; Such work is carried out due to the presence in the container of the cuvette of the saturable absorber CODAC 97O, which is continuously circulating in front of one of the mirrors (1 mm material thickness is intersected).
    The light beam emitted by the laser 1 passes into the optical system 6, which consists of lenses and is also designed to increase the beam diameter in such a way that -. if the surface density of the light beam in the cross-sectional plane of this beam were below the threshold, which causes damage to ordinary metal mirrors.
    The arrangement also allows the use of metal mirrors instead of multilayer dielectric mirrors, which would be necessary with a more concentrated beam. The optical system increases the diameter of this beam by 20 times.
    Then light with a set of inclined mirrors in the hollow bend sleeve 10 is directed to the slit ophthalmologic lamp of the nine-lamp 9. The first mirror in the row is a dielectric mirror reflecting infrared radiation, but the transmission light of a helium-neon laser 1 with a power of 1 mW, which being made collinear to a powerful beam, it allows marking and locating the point of impact on the object.
    The optical system 6, mounted on a helium-neon laser 1, allows the beam to be diverged so that its focus coincides with the focus of the pulsed laser 2 at the point of impact.
    Directly at the exit of the slit lamp 9, the latter contains another dielectric mirror 15, reflecting infrared radiation and transparent to visible radiation.
    This mirror allows white light to be transmitted along the axis of the slit lamp 9, which transmits the processed operating field, to limit the power
    the alignment beam from laser 1 to a value below the safety threshold and save the total infrared energy required for the operation. The beam 1 from lasers 1 and 2 is focused by an achromatic doublet 11 with an optical power of 10 diopters, located at the axis of the slotted lanpa and at such a distance, taking into account the final reflection by the mirror
    5 in the horizontal direction so that the point of focus was precisely located in the pickup plane of the biomicroscope.
    The radiation energy from laser 2, containing with in each shot, on
    The Q level required to use for this operation is a minimum; 2 and a maximum of 5 mJ;
    The size of the spot in focus, adjustable by a lens optic device, is 50-100 µm in diameter.
    A combination of small focal points with extreme brevity. light peaks, ease of use,. Neither energy nor strong convergence of a large-diameter beam (15 mm) is a defining element, which made it possible to very precisely limit the zone of tissue destruction and destroy thermal effect.
    Thus, high powers (10 W / cm) are safe for the retina, located on the shot line: they provide the conversion of targets, even transparent, into electronic
    and ionic gas, into a plasma with an electron density higher than the critical one for which the gas becomes opaque to radiation. (for length
    5th wave A, this critique, if the density is 10 electrons / cm, the optical breakdown carried out by the light pulse causes, therefore, its formation
    0 screen.
    The strong convergence of the beam is also a photo: safety torus: in the retina, the post-focus divergence ensures a distribution of the transmitted light that the surface density of this radiation becomes non-dangerous; strong convergence to the focal point provides such a distribution of the beam, which is necessary to obtain radiation that is not dangerous for transparent surfaces located at the point to be destroyed and intersected by the radiation. In addition, the cornea lens system is also used as a collecting element on the beam path in such a way that the latter cannot in any way collect on the cornea; the point of the most distant focus is located more than 3 mm from it. Experimental operations performed on patients using the device can be divided into four typical cases, 1, Congenital property, In six cases of congenital malformation (patients were 8-13 years old), the crystals were completely white, in five a cataract, in one - less dense but hard, In the case of a hard cataract, it was possible to clear the visual axis for two sessions from 250 to 300 shots (about 7 min), restoring the patient's vision and Pg in the scale on the scale Parino, result before agaemy ambliapii after 12 years, but none meene very satisfactory, in other cases, despite the complete absence of a coloring pigment, it was possible to reveal densely applied by precision strikes the front of the lens capsule. The masses spontaneously dissolve in a single session, widely opening the vigilant axis and restoring the vision from 3. to 7/10 into the distance. There are no vitreous disorders, no anaphylactic or inflammatory reactions. Ii. Consequence injuries. Two cases of traumatic cataracts, cataracts without colored pigment, were operated on. Five to six sessions from 200 to 25 shots during the week allowed the visual axis to be released with a severity of 6 to, with correction,. 3 6 All the cases mentioned before the operation had a reduced sharpness of light perception. W, Secondary or meybranna cataract. 10 cases of secondary cataract were operated on. These membranes were caused by the clouding of the posterior lens capsule after surgery beyond a major cataract, 13 cases with white turbid membranes, without. pigment that was opened after one to three sessions with 250-300 shots. Five cases concerned strained translucent membranes, which limited the severity to the 1/10 limit. In these cases, a session from 5 to 50 beats was always sufficient to restore the patient to a sharpness of 8 / 10-42 / 10 ° with an adaptive correction. Opening by densely striking the two perpendicular axes is more convenient because the test voltage helps clear the axis. The last case is that the membrane of the secondary cataract is located behind the artificial lens (intraocular graft). In this case, the circular disclosure of the membrane through the graft doesn’t happen, this accidental appearance of the marks on this graft during the uncontrolled movement of the block does not interfere with good sharpness (7/10) , Iv, Approaches to the vitreous body. Intervention of intracapsular cataract requires the subsequent disclosure of a transparent vitreous. In four operated cases, four disclosures of this transparent membrane were successfully performed. Vitreous adhesions are spikes or vitreous coagulated ligaments, they are translucent or white, and their existence causes tension. they experience the danger of peeling off the retina where they are implanted. They can also, in some cases, hold up the flap valves of the reticular membrane, it was always possible to cut off these adhesions in six six operated cases.
    7
    or bind either straight or che; cut glass with three mirrors such as
    Goldiyen, In all cases, the dissection was obtained by point
    closely spaced punches.
    10199938
    Thus, the invention is efficient in operation and allows the dissection of intraocular tissues, without heating the cut site and the formation of scars.
    权利要求:
    Claims (3)
    [1]
    1. DEVICE FOR TISSUE TISSUE IN OPHTHALMIC SURGERY, containing a pulsed laser, a helium-neon laser, a system for supplying laser radiation to the surgical field and a slit lamp, which is equipped with a focusing device to prevent scar formation during tissue dissection a system made in the form of an achromatic doublet placed on the axis of a slit lamp, a Fabry-Perrot standard, a cuvette with a mirror and a shutter, and a yttrium-aluminum laser serves as a pulsed laser. Neodymium doped garnet, installed between the Fabry-Perrot etalon and obturator.
    [2]
    2, The device according to p. T, about t l and -, characterized in that. it is equipped with an optical system that serves to expand the beam and is installed between a helium-neon laser and a cuvette.
    [3]
    3. The device according to claim 1, from l. and, what is more, it contains a Pockel cell with a KDR crystal mounted at the output of a pulsed laser.
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    同族专利:
    公开号 | 公开日
    JPS552484A|1980-01-09|
    FR2442622B3|1982-06-04|
    BR7903628A|1980-02-05|
    DE2967522D1|1985-11-07|
    IN152302B|1983-12-17|
    EP0007256A1|1980-01-23|
    AT15855T|1985-10-15|
    FR2442622A1|1980-06-27|
    ES8100873A1|1980-12-01|
    ES481365A0|1980-12-01|
    EP0007256B1|1985-10-02|
    US4309998A|1982-01-12|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7817111A|FR2442622B3|1978-06-08|1978-06-08|
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