Ultrasonic tip

FIELD: medicine.

SUBSTANCE: tip system comprises: an ultrasonic tip that includes a vibration source configured to generate a plurality of ultrasonic vibrations, and a sound receiver configured to convert vibrations to ultrasonic motion; and a blade connected to the sound receiver and made to move under the influence of ultrasonic movements. The blade has a blade handle with a central axis and a razorblade. The blade has a proximal portion extending from the distal end of the blade handle, and a tip extending from the distal end of the proximal portion. The central axis of the proximal portion has a non-zero bending angle θ, the value of which is greater than 0 and less than 30 degrees relative to the central axis of the blade handle; and the tip central axis is located at an angle of the θ razor blade, from 20 to 60 degrees relative to the central axis of the blade handle.

EFFECT: use of this invention allows membrane separation during surgery of a patient with retinopathy.

11 cl, 4 dwg

 



 

Same patents:

FIELD: medicine.

SUBSTANCE: implant layers are presented in the form of congruent ellipsoids of rotation consisting of polymers and/or copolymers of glycosaminoglycans, lactic acid and polyvinylpyrrolidone; all drug-saturated layers are alternated with drug-unsaturated layers, while solubility of each implant layer is provided by hydrolysis of cross linkage and directly proportional to their number.

EFFECT: achieving and maintaining the required drug concentration in the vitreal cavity for the required period of time, no risk of damaging the intraocular structures with high-concentrated drug substances, reducing the intraoperative injury.

2 cl

FIELD: medicine.

SUBSTANCE: implant for the revascularisation of a posterior pole of eyeball is a porous composite of polyethylene tetraphthalate or polycarbonate track-etched membranes with the improved medical-biological properties. Improving the medical-biological properties of the track-etched membranes requires additional plasma processing of cyclohexane.

EFFECT: using the given implant enables improving the trophism and mechanical properties of the sclera in the posterior pole of the eyeball that prevents an optic nerve disorder.

2 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: invention can be used for performing a goniopuncture of trabeculo-Descemet's membrane following a non-penetrating deep sclerectomy (NPDS) if observing disturbed transparency of a cornea or fluid flow of an anterior chamber. The trabeculo-Descemet's membrane is micro-perforated from an angle of the anterior chamber within a projection of a postoperative intrascleral cavity by means of a non-traumatic boomerang needle 10-0, needle bend 3/8. The needle is pricked into the cornea at 3-3.5 mm from a limb with its distal end delivered towards an opened portion of the Descemet's membrane. A needle tip is brought through the cornea and further and advanced along a trajectory aligned with its flexion; the needle tip perforates the trabeculo-Descemet's membrane.

EFFECT: method enables achieving the stable normalisation of intraocular pressure following a minimum surgical intervention.

1 ex

FIELD: medicine.

SUBSTANCE: nasolachrymal canal is intubated with a perforated silicone tube with a hole diameter 23G; the holes are staggered at 3 or 4 mm from each other. A distal end of the tube is blocked, whereas a proximal one is fixed in a projection of semilunar fold. A medicinal gel is introduced into a tube lumen every 7 days during the whole period of intubation - up to 3 months.

EFFECT: method provides the prolonged dilation of the lumen of the lachrymal passages and a possibility of the dosed administration of a medicinal preparation around a silicone frame for a long period of time and the recovery of the lachrymal passages patency, and the prevention of recurrent stricture formation, and the lower injury rate.

2 ex

FIELD: medicine.

SUBSTANCE: method involves removing an epithelial layer, exposing a cornea by saturating it through multiple instillations of 0.1% riboflavin followed by the ultraviolet exposure. After the epithelial layer has been removed, a ring made of an ultraviolet-protected contact lens is applied on a surface of the eyeball perilimbally. An outer diameter of the ring covers the limb by no more than 2 mm, whereas an inner diameter of the ring is equal to a basic diameter of the keratoconus. The whole duration of the ultraviolet exposure involves additional instillations of riboflavin on the cornea every 3-4 minutes. The exposure is characterised by wavelength 365 nm, power 3.0 mWt/cm2 at 50 mm for 30 minutes with the ring to be removed after the exposure is completed.

EFFECT: method is easy to implement, involves no difficulties for specialists, providing higher clinical effectiveness by limiting the ultraviolet exposure area, preventing the ultraviolet involvement of the limb and reducing a risk of postoperative complications.

1 ex

FIELD: medicine.

SUBSTANCE: group of inventions refers to surgery. A surgical console comprises a pneumatically operated valve; the first port and the second port connected to the valve configured to feed compressed gas into each of the first port and the second port alternatively; a pressure sensor connected to the ports; and a controller connected to the valve and pressure sensor. The controller is configured to control the time of open and closed state of a valve passage in accordance with the working cycle of the valve. The time of the open state of the valve corresponds to the first port open time, whereas the time of the close state of the valve corresponds to the first port close time. The controller is also configured to receive a measured port pressure differential and to calculate the port pressure differential in accordance with the pressure sensor data, and to modify the working cycle of the valve depending on the difference of the measured or calculated pressure differential and the desired mean pressure differential for reducing a difference of these values. What is disclosed is a method for the valve adjustment.

EFFECT: maintaining the pressure required for the correct operation of the attached instruments.

19 cl, 6 dwg

FIELD: medicine.

SUBSTANCE: conjunctival flap is formed. Surface sclera and deep triangular flaps are formed with base to limbus with exposure of ciliary body. 2 scleral channels are formed on each side of triangular flap, perpendicular to them. External end of sclera channels must project beyond bed of surface sclera flap. Two collagen drainages "xenoplast" 0.8-1.2 mm thick, 1.0-1.5 mm wide, 4.0-5.0 mm long, are sutured to formed sclera bed. Length of collagen drainages must not exceed length of sclera flap. Anterior eye chamber is opened by cut along limbus. Iridectomy is performed. Anterior chamber is fully filled with viscoelastic. Ends of two drainages are introduced into anterior chamber, with formation of window in trabeculo-Descemet's membrane. Root of iris must not overlap ends of drainages. Surface sclera flap is laid into place and fixed with sutures.

EFFECT: method provides activation of intraocular fluid outflow for long term, formation of flat spilled filtration pillow with strong wall, prevention of scarring of created pathways for outflow without application of antimethabolites due to formation of sclera channels, external end of which lies beyond bed of surface sclera flap, application of collagen drainages without their overlapping by iris root and length which does not exceed length of scleral flap.

4 cl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to ophthalmology, and can be used for the removal of silicone oil from the anterior eye chamber. 2 paracenteses are performed. An irrigation cannula of the phacoemulsifier is introduced into one of the paracenteses. Supply of physiological solution is realised. Removal of silicone takes place passively (by gravity) through the second paracentesis.

EFFECT: method makes it possible to remove silicone oil form the anterior eye chamber in a reliable way with low trauma due to the uniform, without differences in pressure, supply of physiological solution by means of an irrigation system and passive removal of silicone oil through the paracentesis.

1 ex

FIELD: medicine.

SUBSTANCE: simultaneous formation of tunnel and installation of lacoprosthesis are carried out. For this purpose disposable intravenous catheter of 20G calibre with guide needle inside, preliminarily modernised, namely by cutting off vanes case, is used. Remaining flexible catheter in form of cylindrical tube is used as lacoprosthesis with placement of guide needle inside it and providing 1.5-2.0 mm protrusion of needle beyond distal end of lacoprosthesis during work. Tunnel formation is realised by puncturing soft tissues with guide needle with access to lachrymal bone. After that, lachrymal bone is punctured under endoscopic endonasal control with further movement of needle with lacoprosthesis into nasal cavity. After that, guide needle is brought out, lacoprosthesis is lowered into common nasal meatus until proximal end of lacoprosthesis, formed in form of "hat" is installed into zone of internal angle of optic fissure.

EFFECT: method makes it possible to create reliably working lachrymal passage with application of permanent lacoprosthesis.

3 cl, 3 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to ophthalmic surgery and concerns intraoperative intraocular pressure regulation (IPR). That is ensured by using a microsurgical system comprising a surgical cartridge, a surgical unit and a computer. The cartridge comprises an infusion chamber containing an irrigation fluid. The pressure is generated and maintained in the microsurgical system by a pressure generator hydraulically connected to the above surgical cartridge and comprising a compressed gas source. The device also comprises an electromagnetic proportional valve and a gas line hydraulically connecting the compressed gas source, proportional valve and surgical cartridge. The surgical unit gets hydraulically connected to the surgical cartridge by an infusion fluid line. The required IPR is specified. The pressure is maintained in the above infusion chamber by gas pressure-fed from the above compressed gas source into the surgical cartridge. The irrigation fluid is supplied into the surgical unit in the infusion fluid line. The irrigation fluid flow is measured in the infusion fluid line; a signal corresponding to the measured irrigation fluid flow is injected into the computer. The estimate IOP is calculated in the computer in response to the received signal. The computer is used to regulate compressed gas pressure by injecting the second signal from the computer onto the proportional valve to maintain the estimate IOP equal to the required IOP.

EFFECT: method provides the IOP regulation, including the compensation function that reduces potential intraoperative hypotension and secondary complications.

2 cl, 4 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine and can be applied for fixation of sclera flap in antiglaucomatous operations. First in-puncture of needle with thread is performed into place in sclera located at 1 mm distance from internal angle near apex of sclera flap and in 1 mm from cut edge, out-puncture of needle is performed into sclera flap into place located in 1.5 mm from internal edge and in 1 mm from cut edge, second in-puncture of needle is performed into external edge of sclera flap into place which is located in 2 mm from flap apex and in 1 mm from cut, out-puncture of needle into sclera is performed into place, located in 1 mm from cut edge and in 2.5 mm from external angle of flap, third in-puncture is made into base under flap at 1.5 mm distance from external flap edge, and out-puncture of needle out is made through layers of eye cornea at 1.5 mm distance from limb, forth in-puncture of needle into layers of cornea is performed into place, located at 1.5 mm distance from limb, and out-puncture of needle with thread is made under flap base in 1.5 mm from internal edge of sclera flap, fifth in-puncture is performed in 2 mm from flap base near internal edge into sclera flap in 1 mm from cut, sixth, final in-puncture is made into flap apex in 1.5 mm from external edge and in 1 mm from cut, and out-puncture is made into sclera at 1 mm distance from external edge of flap top and in 1 mm from cut, after which two ends of thread are pulled together into knot.

EFFECT: method makes it possible to increase hypotensive effect, reduce probability of vascular membrane detachment.

10 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of ophthalmic surgery and can be used for simultaneous marking of capsulorexis and astigmatic axis of toric intraocular lens in the process of its implantation. Marker contains handle and working part in form of cylindrical ring. Working part is provided with two diametrically located wedge-shaped protrusions, each of which is limited from the side of marker centre with plane of rectangular isosceles trapezium. Trapezium is inclined relative to vertical axis of the device at acute angle. Base of wedge-shaped protrusion faces upper external surface of ring, and its acute angle at apex faces lower surface of ring. Side of surface at acute angle apex and lower surface of ring are sharpened.

EFFECT: increased accuracy of marking, providing simultaneous marking of capsulorexis and astigmatic axis of toric intraocular lens in its implantation, reduction of operation time.

3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology, and is intended for protection of macular region from spread of superior retinal detachment. If ruptures of fresh detachment of patient's eye retina are located in zone from 8 to 4 o'clock, first puncture of eye sclera and flat part of ciliary body with needle 30-25G in 3-4 mm from limb in the area where retinal rupture is located, is performed. After that, ophthalmologic expanding gas Sulfurhexafluoride (SF6) is introduced intro vitreal cavity through syringe, administered single dose of gas introduction is in the range 0.1 - 0.7 ml. After that, near limb, according to 9-10 o'clock meridian, 0.5-1.5 mm wide paracentesis of cornea and following partial, to normalisation of ophthalmotone, drainage of subretinal fluid are carried out. Then, in order to bring together edges of puncture of conjunctiva and sclera massage in the area of puncture is performed by means of sterile micro-swab. After that, patient is put in "face down" position for 3-12 hours. Then, patient is brought into position, in which retinal rupture is above, for 2-3 hours. Ophthalmoscopic control of retina fitting is carried out. In case of complete retina fitting, laser coagulation of rupture is performed, in case, if detachment of retina remains, further surgical treatment is performed in delayed, planned manner. Spread of retinal detachment is prevented by means of gas bubble, formed preliminarily introduced gas and transferred into zone of detachment by carrying out said procedure of selecting patient's position.

EFFECT: method ensures protection of macular area from spread of fresh superior retinal detachment, and in this way change of urgent surgical treatment into planned one, and in some cases elimination of further surgical treatment.

2 cl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to ophthalmology and can be applied for electrochemical lysis and surgical ablation of intraocular neoplasms. Electrochemical lysis is performed with application of two platinum electrodes. One electrode-anode, made from platinum mesh and provided with handle-holder, making it possible to place electrode and move it within the entire zone of projection of tumour base on sclera, is applied to sclera. The other electrode-cathode, needle-shaped with curved intra-tumour part, is introduced into tumour intraocularly, parallel to sclera with 3 mm indent from the tumour top. In the course of ECL products of tumour decomposition are removed intravitreally by means of vitreotom.

EFFECT: method makes it possible to preserve integrity of sclera in the zone of tumour base projection, reduce risk of recurrences.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, in particular to ophthalmology, and can be used for surgical treatment of progressing and complicated myopia. As scleroplastic material implanted is three-component complex, which contains mesenchymal stem cells, labeled with magnetic microparticles. Cells are translocated into biological or synthetic fine-porous material, which is tightly connected with polymer magnetic material with induction of constant magnetic field 1.5 mT, with multi-polar reversible magnetisation.

EFFECT: invention ensures enhancement of strength-elastic properties of sclera, stabilisation of myopic process with simultaneous prevention of development of dystrophic changes of eye fundus or further progressing in case of their presence.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to ophthalmology and may be used to determine the optimal diameter of graduated opening of the posterior capsule. The posterior capsulorrhexis diameter is determined by formula: D primary posterior capsulorrhexis = D anterior capsulorrhexis x K with the coefficient K falling within the range of 1.2 to 1.5, while the anterior capsulorrhexis diameter shall fall within the range of 5.5 mm to 6.0 mm.

EFFECT: method enables reducing a risk of lens position destabilisation.

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology and can be applied in surgical treatment of refractory glaucoma. Superficial scleral flap is cut out on 1/3 of sclera thickness. Proximal end of drainage tube is passed through intra-scleral tunnel, formed to depth of 1/3 of sclera thickness at distance 1.5 mm from lower boundary of main scleral flap. Width of intra-scleral tunnel corresponds to diameter of drainage tube. Tube is implanted into anterior chamber.

EFFECT: method ensures close envelopment of drainage tube by tunnel walls and stable sutureless fixation of tube, reduction of surgery dimentions.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to ophthalmology and can be applied in carrying out collagen crosslinking of cornea of patients with initial keratoconus. Zone of ultraviolet irradiation is formed by means of soft cosmetic contact lens. In the central part of lens made is opening, whose form corresponds to ectasia of patient's cornea by personal data of keratotopography. Lens if coloured in black colour.

EFFECT: method makes it possible to protect limb area of eye and zone of cornea, which does not require irradiation, prevents dispersion of ultraviolet irradiation.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology, and can be used for treatment of secondary glaucoma after performing subtotal vitrectomy with introduction of silicone oil after retinal detachment. Superficial sclera flap is formed. Application of mitomycin C in dos 0.1 ml with concentration 0.2-0.5 mg/ml is performed onto internal surface of superficial flap for 1-5 minutes before ablation of middle layers of sclera. Ablation of middle layers of sclera is carried out to limbal layers of cornea. Needle 27G is introduced under sclera flap in the area of limbus, in the centre of cut out flap, and used to introduce 0.1-0.3 ml of viscoelastic into anterior chamber. Needle is removed and drainage Ex-press Shunt Model P 200 (Alcon, the USA) is installed into anterior chamber by means of injector. Operation is completed. Injections of 5-fluoruracyl in dose 0.1-0.2 ml are performed into filtering bleb subconjunctivally on the first day and further one time per week for 5-7 days.

EFFECT: method ensures preservation of visual functions, recovery of tracts for intraocular fluid outflow, and the most complete removal of emulsified silicone from anterior chamber.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to ophthalmology and can be applied for treatment of open-angled glaucoma. Air under pressure 60-80 mm Hg is injected into zone of lower part of limbus outward from Schlemm's canal, not reaching ciliary body, until bubbles appear in anterior chamber. If increase of intraocular pressure recurs, injection is repeated.

EFFECT: method makes it possible to restore lumen of Schlemm's canal, ensure stable hypotensive effect.

2 cl, 2 ex

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