Device for surgical correction of ocular reflection anomalies

FIELD: medicine.

SUBSTANCE: invention belongs to medical equipment, notably to devices for surgical correction of ocular reflection anomalies. Device includes ultraviolet pulse laser with square section beam, along beam situated diaphragm, optical scanner for laser beam control and output lens. Output laser beam is connected to input of cylindrical telescope, which is enclosed in body and consists of cylindrical lenses; telescope's ratio is equal to proportion of bigger and smaller sizes of laser beam's orthogonal section. Front surface of cylindrical telescope's input lens is matted.

EFFECT: application of invention enables to enhance Gaussian distribution quality and stability of laser beam energy density on cornea due to beam contraction and dispersion on matted surface.

1 dwg

 

The invention relates to medicine, in particular to ophthalmology, and is intended for the correction of refractive errors of the eye.

Known device for correction of the cornea that implements the specified method (US patent # US RE37504 F, CL 606/5, January 8, 2002). This system includes a surgical periodic-pulsed UV laser, mounted on common surgical laser optical axis aperture, two-dimensional galvanoscanner, a projection lens that forms on the surface of the patient's eye light ablerus spot UV-laser, rotary dichroic mirror, centering the laser visible range, computer control system and the microscope. A disadvantage of the known device is the uneven distribution of energy density in the laser spot, which leads to high surface roughness of the cornea and can lead to unstable refractive results and postoperative astigmatism.

Closest to the proposed is the installation for the correction of the cornea (patent RU 2230538 C1, dated December 26, 2002). The laser system includes a surgical pulsed-periodic laser located on a common surgical laser optical axis: replaceable diaphragm, two-dimensional galvanoscanner, a projection lens, a rotary daraiche mirror, microscope, C is Teruyoshi laser visible range, computer control system and a photosensitive device for determining the relative coordinates ablereader spots, coupled with the control system.

The disadvantage of this device is that of the output laser beam through the aperture cut the most uniform region, which then goes into the optical path. This area is the source contains the heterogeneity of the output beam, which are enhanced in the long-term operation of the laser due to contamination of the mirrors. At this stage lost a significant amount of energy. In addition, when the heating of the laser changes the distribution of output energy and changes accordingly the distribution within the aperture. This leads to high surface roughness of the cornea and can lead to unstable refractive results.

The purpose of the invention is to provide the most smooth surface of the cornea when performing refractive surgeries by improving the quality and stability of the Gaussian distribution in the laser spot moving over the surface of the cornea in accordance with a predetermined algorithm.

The goal is achieved in that the device containing the ultraviolet pulse laser with an output beam of rectangular cross-section, the optical scanner to control the laser beam, the aperture, the output lens and the device which is of the beam, the latter is in the form of a cylindrical telescope, consisting of two cylindrical lenses, and the flat surface of the input cylindrical lens is a matte surface with a given degree of roughness for the formation of the Gaussian distribution of the energy density of the laser beam at the output of the telescope.

The drawing shows the proposed device.

The device has an ultraviolet pulse laser 1, is enclosed in a cylindrical housing of the telescope 2, consisting of the cylindrical lens 3 with a matte surface 5 and the cylindrical lens 4, the aperture 6, the scanner 7, the output lens 8.

The device works in the following way:

The beam of ultraviolet pulse laser 1 with a wavelength of 193 nm, with a rectangular M×N (where M is a large side of the rectangle, and N is small) and the uneven distribution of energy passes through a cylindrical telescope 2, consisting of cylindrical lenses 3 and 4. The magnification of a telescope is equal to the ratio K=M/N, which provides the transformation of the rectangular beam in a square with a cross section of N×N. the Distribution of energy density in the beam at the laser output is uneven. The cross section of the beam passing through the center of the beam in the short axis, the distribution is close to Gaussian, and along the long axis it is an uneven shelf littered with edges. The transformation of the W beam from a rectangular to square leads to the alignment of the energy in the beam, and he becomes close to Gaussian in two mutually perpendicular cross-sections. But the quality of the beam and in this case it is bad, because the distribution of energy there is a strong heterogeneity. In addition, these inhomogeneities are unstable and depend on the contamination of the mirrors of the laser resonator, the degree of heating of the laser, the pump energy and pulse frequency.

Due to the propagation of the beam through Matt (specular) surface 5 on the front face of the cylindrical lens 3, the energy distribution along the transverse axis becomes Gaussian. Matte surface converts the beam into a Gaussian, making it perfectly smooth. The scattering surface 5 is made with a degree of roughness to the scattering of laser radiation occurred in a given solid angle θ. Matte surface can be represented in the form of a chaotic set of troughs and peaks with a characteristic scale of 30-80 μm. A laser beam with a size of, for example, M×N mm can be considered as a set of elementary beam size comparable with inhomogeneities matte surface. Each elementary beam is scattered by the corresponding portion of the surface in the solid angle, the magnitude of which depends on the scale and height of heterogeneity. The scattered beams overlap, and due to this, the output of the telescope is obtained stable CH is dcoe Gaussian energy distribution. When the size of the beam 2×6 mm is convenient to use three cylindrical telescope for receiving the output beam with a size of 2x2 mm

Next, a square beam is clipped by a round aperture at the level of the threshold of ablation (about 13% of the maximum energy of the Gaussian distribution) and is converted into a beam with circular cross-sections. The diameter of the aperture is chosen close in size to the N to the maximum energy of the laser.

Further, the beam hits the mirror of the scanner 7, which can direct the beam at a given point of the surface of the cornea with a frequency up to 500 Hz. Lens 8 converts the beam diameter at the aperture in the defined size of the beam on the surface of the cornea 9.

The patient is undergoing tests on diagnostic equipment, and on the basis of these data calculation operation. During operation, the computer instructs the scanner to direct the beam at the given coordinates, and the laser command on the radiation pulse. This process continues until the laser will not hotstream all design points. Thus, vaporizing the corneal tissue according to the specified algorithm can correct myopia, hyperopia, myopic and hypermetropic astigmatism and other refractive errors of the eye.

When the UV pulse laser is observed instability of the parameters from time to time. In some similar condition is Hanukah from the source laser beam is cut the most uniform part of the through aperture. When warm-up of the laser beam changes its position, and in part of the beam is cut by the aperture, unpredictable changes the distribution of energy, which leads to an increase of the surface roughness of the cornea, changing the calibration on energy and instability results.

The proposed device completely eliminates this disadvantage, as it ensures the stability of the energy distribution in the output beam with small changes in the direction of the laser beam.

When the laser within a few days of its energy output falls and to maintain a given level is required to increase the energy of the pump, which in turn leads to changes in the distribution of energy and increase in surface roughness, i.e. the deterioration of its quality.

After prolonged use of the laser for a few months cause contamination of the cavity mirrors and the mirrors of the optical system, which leads to a change of the energy distribution.

The proposed device completely eliminates these disadvantages and provides stability of the distribution of energy in the spot on the surface of the cornea, despite changes in the output beam of the laser and the contamination of the optical path.

After the cylindrical telescope beam remains parallel, and therefore, the spot size will not change when the variance of poverhnostnoaguoe from the focal plane. This feature allows one to simplify the tracking system of the eye and make it two-dimensional instead of three-dimensional.

Device for the surgical correction of refractive errors of the eye containing the ultraviolet pulse laser with an output beam of rectangular cross-section located along the beam direction of the laser aperture, the optical scanner to control the laser beam, the output lens, characterized in that the output beam of the laser is connected to the input of a cylindrical telescope enclosed in the housing and consisting of a cylindrical lens, and the multiplicity of cylindrical telescope is equal to the ratio of the major and minor sides of the rectangular cross section of the laser beam, and an input cylindrical lens telescope has a matte surface on the front face.



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention relates to medicine, in particular to ophthalmology. At distance 1.5-2 mm from limb on 12 o'clock trans-conjunctively, in direction towards deep layers of cornea stroma, formed is 2.5-3.0 mm wide and 2.5-3.0 mm long tunnel. Splitting of cornea stroma at depth of 2/3 of its thickness with following formation of intra-stromal pocket of round shape with diametre 8.5-9.0 mm is performed. In formed intra-stromal pocket in folded form, with application of standard injector for implanting intraocular lenses, hydrogel disk with diametre 8.0 mm and thickness 0.1 mm is implanted.

EFFECT: method allows to simplify operation and reduce its trauma, as well as to eliminate conditions for development of induced post-operational cornea astigmatism.

3 cl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology. In upper segment of eye-bulb conjunctival flap with 2 mm separation from limb is formed, superficial scleral flap with 1-2 mm separation to transparent layers of cornea is formed, deep rectangular, triangular or trapeziform scleral flap with preservation of deep sclera layers on surface of ciliary body is formed. After removal of deep scleral flap, external wall of Schlemm's canal and corneoscleral tissue is cut on depth to Descemet's membrane. Then exposure of ciliary body is carried out by total cut of sclera on top of flap to surface of ciliary body, and after that laying of surface scleral flap with its fixation to sclera, after which operation is finished.

EFFECT: method allows to increase stability degree of microcirculation processes, prevent accumulation of exudative liquid in suprachoroidal space in early post-operational period, stabilise visual functions, normalise ophthalmotone regulation parametres.

1 ex

FIELD: medicine.

SUBSTANCE: device contains working part in form of ring, front surface of which is scaled in angle degrees, and handle. Working part is bent from handle at angle 40-50°. External lateral side of working part in diametrical section is perpendicular to front surface. Internal lateral side in diametrical section is made in form of jogged line. First section begins from front surface, and is made at angle 35-45° to it. Second section is parallel to front surface and directed towards external lateral side. Third section is perpendicular to second, and fourth is made at angle125-135° to third section and directed towards external lateral side. On lateral side of working part made is through opening, longitudinal axis of which is perpendicular to external lateral side and third section of internal lateral side. Into opening from external side of working part introduced is connecting pipe, which is connected with vacuum system. Space between second and third sections and surface of eye-bulbe forms vacuum chamber, into which through opening goes out on lateral side. Internal diametre of working part on anterior surface constitutes from 10 to 12 mm, and internal diametre on posterior surface constitutes from 18 to 20 mm.

EFFECT: application of claimed device allows to increase clinical-functional results of surgery, reduces intra- and post operational complications, and also reduces time of surgery.

3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology. Transciliary access to vitreal cavity is formed. Before removal of epirental membrane (ERM) part of silicone oil in vitreal cavity is replaced with saline. ERM is removed by vitreotome. Remains of saline are removed by active aspiration and silicone oil is additionally introduced to normotony, after which operation is finished.

EFFECT: method allows increasing of surgical treatment efficiency, improvement of visual functions, reduction of retina trauma and acceleration of rehabilitation period.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmic surgery, and can be used in treatment. Access to anterior chamber is formed, viscoelastic is introduced with further dissection of trabecule with cutting instrument under direct gonioscopic control. Dissection of trabecule is performed in discontinuous way, for which purpose dissection of trabecule on length 1-1.5 mm is alternated with non-dissected section 1-1.5 mm long, as cutting instrument, used is trabeculotome in form of spatula with lateral double-edged cutting edges and blunt distal end in form of arch with smoothly rounded facets, which is brought into ciliary canal until distal end rests against external wall of canal, and without losing said contact movement on arch-shaped trajectory is performed with dissection of trabecule, after which, without changing trabeculotome position, it is used to perform pressing movement towards posterior edge of ciliary canal, widening ciliary canal opening, operation is finished by introduction into anterior chamber of BSS solution to hypertone.

EFFECT: method allows to normalise intraocular pressure with lower number of hemorrhagic complications, with high vision acuity in early post-operational period.

3 cl, 1 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to ophthalmology, and can be used in diagnostics of tumours and tumour-like diseases of orbit. Computer and/or magnetic resonance tomography of orbit with further introduction of biopsy needle into orbit and orbit neoplasm is performed. For this purpose primarily three-dimensional model of patient's orbit is created, after that carried out is modelling of course of puncture biopsy of orbit neoplasm on three-dimensional orbit model (TOM), during which location of point of biopsy needle entrance into TOM is determined, angle of biopsy needle inclination and depth of biopsy needle introduction into TOM are measured. After that points are transferred from TOM to patient's eye orbit. Biopsy needle is introduced into patient's orbit and into orbit neoplasm in point of entrance, determined on TOM, at angle between introduce biopsy needle and perpendicular, determined on TOM, to the depth of biopsy needle introduction into orbit, determined on TOM, after which, sampling of biopsy material is performed.

EFFECT: method allows to increase accuracy of introduction of biopsy needle into orbit and orbit neoplasm and reduce trauma of intraorbital structures in course of puncture biopsy.

2 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: device consists of handle and working part. Working part consists of working segment, holder, first knee and second knee. Upper edge of working segment is made flat, lower edge is made rigid and sharp. External lateral side of working segment consists of three sections. Method includes introduction of working segment of device through paracentesis. Working segment of device is introduced through paracentesis into anterior chamber, filled with viscoelastic, in circumference arch clockwise. After that device is fixed with lower rigid sharp edge to anterior capsule of lens according to lens centre. After that through main corneal incision introduced is capsule forceps and capsule is punctures in the centre of lens with formation of valve. Valve is gripped with forceps and line of capsule rupture is brought to place where working segment is connected with second knee, after that rupture of capsule on rigid lower edge is performed, bending capsule over upper edge of working segment upwards and outwards. Edge of capsulorexis is brought to edge of free end of working segment. Device is removed on circumference arch counterclockwise. Into the same paracentesis second device is introduced and installed in accordance with lens centre in such a way that free end of working segment matches the edge of formed earlier capsulorexis and carrying out of remaining part of capsulorexis is continued according to described above method, starting from free end of working segment.

EFFECT: application of claimed group of inventions allows to increase quality of cataract phacoemulsification due to performing capsulorexis of strictly specified size and location.

4 cl, 4 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: claimed invention relates to field of medicine, namely to ophthalmology. In formed by puncture accesses ports of 25 G caliber are installed, in upper quadrants installed are upper ports, whose upper part is made cylindrical, to upper part of said two ports connected are two silicon tubes, whose opposite ends in their turn are connected with two outlets of aspiration system, third port being installed in lower-external eye quadrant - lower port. Through upper ports silicon oil (SO) is removed, after that through lower port eye ball is filled with air to half of volume until remains of SO are completely removed through upper ports, operation being finished with introduction into openings of all ports and under eye mucosa in region of ports of viscoelastic preparation with high cohesive and adhesive properties in amount 0.1-0.2 ml, after which ports are removed.

EFFECT: method allows to preserve visual functions, reduce number of complications, reduce degree of reproliferation of proliferation tissue, reduce number of recurrences of retina detachment, improve quality of surgical treatment.

2 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to ophthalmology, and aims at excimer laser ablation for the refraction correction associated with thin cornea. Substance of the method consists in the formation of a suboptic zone between optical and transitive zones of the cornea such that a curve circumscribing the focal power of the cornea has no derivative ruptures, while a surface of the cornea in the entire ablation region is smooth.

EFFECT: method allows to correct high and ultrahigh myopia on the thin cornea.

1 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine, more specifically to ophthalmosurgery and can be used in the implantation of a S-curved intraocular lens (IOL), e.g. Acrysof, with the suture fixation to the iris on eyes without a capsular support. After preliminary myosis, the lens is implanted through a small tunnel incision by bringing supporting elements behind the iris to be anchored thereafter. At first, it is one supporting element that is brought behind the iris with the second one to be kept in the tunnel incision. The brought supporting element is sutured to the iris. Then the remained part of the lens is brought behind the iris. An instrument, e.g. a hook, is brought closer under an optical part of the lens that is centered by pressing the optics upwards; the second supporting element is sutured. The sutures are at 2.5-3.5 mm from a pupil edge with a stitch length maintained to be 1-1.5 mm.

EFFECT: method allows making a round pupil and keeping an irising function in the postoperative period that is expressed in preserved normal reaction of a pupil to light, ensured good cosmetic effect and reduced length of operation.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine and is intended to determine time for training on how to assess time of visual information sensing. The tested person is exposed to sequence of two light pulses with duration of 50 ms separated by pause with duration of 150 ms, repeating via constant time interval of 1.5 s. At the first stage duration of pause is reduced with speed of 20 ms/s, at the second stage duration of pause is increased with speed of 5 ms/s, at the third stage of measurements duration of pause is reduced with speed of 1 ms/s, until the tested person determines moment of subjective merger or separate perception of two light pulses. Time of visual information perception is accepted as equal to value of sum of duration of light pulse and duration of pause at the moment of subjective merger of two light pulses into one, determined at the third stage. It is marked on plane in coordinates "value of time for visual information perception - number of measurement". Procedure is repeated, curve is built for dependence of visual information perception time values as function tvip=f(Ni), where Ni - number of i measurement, i=1, 2,…, k, k - number of measurements, until quasistationary mode is obtained. Time of training is determined by number of measurements performed during transition process.

EFFECT: method expands arsenal of facilities for determination of visual information perception time assessment.

5 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine and is designed for determining the duration of training of assessment the time of persistence of human vision system. The subject is demonstrated a sequence of two light pulses of duration Fi = 50 ms, separated by a pause in the initial duration of tp beg = 150 ms, repeated every constant time interval T = 1.5 s. In the first stage of measurement the duration of the pause between two light pulses is decreased with a constant speed of 20 ms/s, till the subject does not identify the moment of subjective fusion of two light pulses into one. On the second stage of measurement the pause duration between two light pulses is increased at a constant speed of 5 ms/s, until the subject does not determine the moment of the subjective sensation of separateness of these two light pulses. On the third stage of measurement the pause duration between two light pulses is decreased with a constant speed of 1 ms/s, until the subject does not define the moment of subjective fusion of two light pulses into one. The time of persistence of human vision system tper is taken as equal to the value of the pause duration tp, which is marked on the plane in coordinates of "value of time of persistence of human vision system - the number of the measurement". The described procedure is repeated several times, a graph of dependence of values of time of persistence of human vision system tin is made as a function tin=f(Ni), where Ni is a number of i-measurement, i = 1, 2…k; k is a number of measurements before obtaining a quasi-stationary regime, when the transition process is completed. Training duration is determined by the number of measurements made during the transition process.

EFFECT: method enables to take into account the individual character of stabilisation of the measured values of time of persistence of human vision system.

5 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine and aims at determining learning time to estimate excitation time of the visual analyser of an individual. Paired light pulse train of duration 200 ms separated by a pulse separation of 70 ms and repeated every 1 s of a regular time interval is presented to a person being tested. At the first stage the pulse separation length is decreased at constant speed 20 ms/s; at the second stage the length is increased at constant speed 2 ms/s; at the third stage the length is decreased at the constant pitch 0.1 ms until the person being tested specifies a moment of internal sensation when two light pulses are separated or fused in a pair. The excitation time of the visual analyser is specified to be equal to the pulse separation length specified by the person being tested and marked in a coordinate plane "excitation time - measurement number". The procedure is repeated more than once, and function tet=f (Ni) is graphed, where Ni is a number of the i-th measurement, i=1, 2,… k; k is a number of measurements, to enable a quasi-stationary mode when a transient process is completed. The learning time is determined by the number of measurements during the transient process.

EFFECT: method extends the range of products for determining learning time to estimate the excitation time of the visual analyser of an individual.

5 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: invention refers to ophthalmology and intended for objective determination of habitual accommodation tone. The objective determination of habitual accommodation tone is ensured an automatic binocular open field refractometre. Refraction is measured in full darkness (dark focus) and in daylight cycloplegia. The habitual accommodation tone is considered as a difference of refractions in full darkness and in daylight cycloplegia.

EFFECT: method allows considering an actual value of the habitual accommodation tone.

2 ex

FIELD: medicine.

SUBSTANCE: invention belongs to medicine, notably to ophthalmology and designed for intravital evaluation of cornea's elastic characteristics. Cornea's elastic characteristics is evaluated with applanation by Maklakov tonometre with weights of 5 and 15 g. Difference between pressures measured with both weights is found. With difference more than 11 millimetres of mercury, cornea's elastic characteristics considered as subnormal, with difference between 9 and 11 millimetres of mercury, cornea's elastic characteristics considered as normal, with difference less than 9 millimetres of mercury, cornea's elastic characteristics considered as increased.

EFFECT: method provides subsequent adequate valuation of intraocular pressure, measured by Maklakov tonometre.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, in particular to methods of functional diagnostics of functional state of tear fluid, which is to great extent determined by surface tension of tear fluid. By means of optical coherent tomograph image of tear fluid meniscus between cornea and lower eye-lid is obtained. On the basis of obtained image value of meniscus chord (h) and meniscus flexure (x) are determined. Coefficient of surface tension of tear fluid (α) is determined: where ρ is tear fluid density, equal 1000 kg/m3, g is free fall acceleration, equal 9.8 m/s2. Obtained coefficient is compared with average standard value. If obtained value is higher than standard value conclusion about disturbance of tear fluid functional state is made.

EFFECT: method allows to determine tear fluid functional state in process of optical express-diagnostics of moistening cornea with tear fluid due to determining its surface tension coefficient.

3 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: 3 months after the photodynamic therapy, the fluorescent angiography is applied in the patient. The angiography is analysed in an advanced venous phase in a program used to calculate the fluorescence brightness of a choroidal neovascular membrane (CNVM) and the fluorescence brightness of a balanced CNVM site of an intact eye-ground. The CNVM fluorescence intensity factor which represents a relation of the average brightness of a CNVM nidus to that of the intact eye-ground is calculated. If the CNVM fluorescence intensity factor is less than or equal to one, photodynamic therapy is considered to be effective.

EFFECT: method allows for objective estimation of clinical effectiveness of PDT in choroidal neovascularisation based on the quantitative analysis of the fluorescent angiography data.

3 ex

FIELD: medicine.

SUBSTANCE: invention relates to ophthalmology and is intended for prediction of diabetic retinopathy development in patients with pancreatic diabetes. Reaction of pupils in the darkness in case of normoglycemia and hyperglycemia with gradient of glycemia not less than 7-8 mmol/l against the background of similar AP and IOP is carried out. Value of pupil amplitude difference is determined in mm against the background of similar arterial (AP) and intraocular pressure (IOP). If difference is more than 0.42 mm in case of pancreatic diabetes of I type and more than 0.67 mm in case of PD of II type diabetic retinopathy development is predicted.

EFFECT: method allows to extend arsenal of means for prediction of diabetic retinopathy development in patients with pancreatic diabetes applying simple, non- invasive, available to wide application method of examination, for adequate observation of patients in order to treat complications in due time.

4 ex

FIELD: medicine.

SUBSTANCE: invention concerns medicine, particularly ophthalmology and covers diagnostics of pathological changes caused by incomplete adaptation of neuroepithelial layers of retina following vitreoretinal surgery of detached retina. The vitreoretinal surgery of detached retinas is followed by early postoperative optical coherence tomography (OCT) and computer assisted microperimetry (CMP) of central retina provided completely attached retina confirmed by ophthalmoscopy and ultrasonic analysis and low visual acuity; and if OCT shows the thickness of central retina in foveal minimum does not exceed 200 mcm, within the region 0.5 to 1.0 mm exceeds 250 mcm, within the region 1.0 to 3.0 mm exceeds 300 mcm, within the region 3.0 to 6.0 mm exceeds 350 mcm, with incomplete adaptation of neuroepithelial layers, and CMP shows absolute or relative scotomas with photosensitivity 2 to 14 dB within the regions corresponding to the topography of the regions with disturbed morphological adaptation of retina indicated by OCT, morphofunctional disorders of central retina following the vitreoretinal surgery of detached retina are diagnosed.

EFFECT: method allows detecting morphofunctional disorders of central retina following the vitreoretinal surgery of detached retina.

2 ex

FIELD: medicine.

SUBSTANCE: microperimetritic examination is carried out and light-sensitivity of retina in the centre and on edge of fovea, as well as localisation of fixation point before and after vitrectomy operation are determined, and if after operation determined are disappearance of absolute scotoma and light-sensitivity more than 1 decibel in the centre, increase of light-sensitivity on 3 and more decibel on fovea edge, displacement of fixation point on distance more than 100 mcm towards fovea centre, surgical treatment is considered to be functionally efficient, and if absolute scotoma and light-sensitivity 0 decibel in fovea centre remain, there is no increase of light-sensitivity on fovea edge, no displacement of fixation point towards fovea centre, treatment is considered to be functionally inefficient.

EFFECT: method allows to increase quality of evaluation of macular rupture treatment efficiency.

8 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: invention refers to surgery, and it can be applied for laparoscopic appendectomy. The mesentery is transected as close to the vermiform appendix as possible at 5-6 mm from its wall with the use of pulse laser radiation of pulse duration 50-60 m/sec and pause duration 100-110 m/sec, power 25-30 Watt. The exposure runs from an apex of the vermiform appendix to its basis. If observing a bleeding in the treated mesentery, laser exposure is applied again. Two ligatures are applied on the vermiform appendix which is transected between the ligatures in a continuous mode. The mucous membrane of the remained stump is exposed to laser treatment.

EFFECT: technique allows to reduce intraoperative injuries and blood loss.

1 ex, 6 dwg

Up!