Method for preoperative determination of intra-lenticular pressure in patients with swelling cataract

FIELD: medicine.

SUBSTANCE: invention can be used for pre-operative determination of the intra-lenticular pressure (ILP) in patients with swelling cataract. Preoperative ultrasound biomicroscopy of the anterior part of the eye is performed. Lens thickness, depth of the anterior chamber and hypoechoic layer thickness are determined. The ILP is calculated by the formula: ILP=-21.940+8.082A+4.244B+2.800C, where A is lens thickness; B is depth of the anterior chamber; C is hypoechoic layer thickness.

EFFECT: method provides objective ILP determination in patients with swelling cataract, which allows phacoemulsification of the swelling cataract without complications.

2 ex

 



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to ophthalmology. A confocal scanning laser retinal tomography is used to measure an oedema coefficient "e" in the Rl-Central region. If the coefficient "e" is less than 0.780.04 in mild myopia, less than 1.080.04 in moderate myopia, less than 2.180.1 in myopia alta, it is supposed to be measured once again 6 months later. If the coefficient "e" accompanying any degree of myopia increased by 9% or more, the acquired myopia progression is predicted.

EFFECT: method provides the early prediction of the myopia progression, prevents organic retinal changes by determining the oedema coefficient "e" in dynamics.

3 tbl, 3 ex

FIELD: medicine.

SUBSTANCE: if minimum changes of the eye grounds are observed and visometry and optical coherence tomography (OCT) fail to provide any informative findings, a microperimetry is conducted in the patient with symptoms of first appeared retrobulbar neuritis with using macula-8 program testing 45 points of eight degrees of central visual field with Goldmann III stimulus of 0.43 degrees of 200 ms long. Retrobulbar neuritis accompanying the onset of multiple sclerosis is diagnosed if the examinations show a moderate light-sensitivity in the nasal, upper or lower nasal segments of less than 16 dB within 8 degrees of the central visual field in a projection of a papillomacular bundle.

EFFECT: technique enables providing more reliable diagnosis in uncertain cases of the clinical course of the disease that is ensured by using microperimetry with macula-8 program additionally.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to ophthalmology, and can be applied in the diagnostics of the crystalline lens subluxation. Biomicroscopy is carried out by means of a portable slit lamp. Biomicroscopy is realised under conditions of the maximal drug mydriasis in a position of the patient lying on the back.

EFFECT: method provides clear visualisation of all signs of the crystalline lens subluxation of I degree due to the displacement of the vitreous body backwards under the impact of gravitation with the patient in the lying on the back position, as well as makes it possible to perform biomicroscopy in all quadrants of the eyeball and under any angle due to the mobility of the portable slit lamp.

2 ex

FIELD: medicine.

SUBSTANCE: ultrasonic biomicroscopy is used to measure the distance of the lens and corneal endothelium and the distance of the trabecule and iris in the lying and sitting patient. A difference of 0.5 mm and more of the lying and sitting distances of the lens and corneal endothelium is detected. A difference of 0.1 mm and more of the lying and sitting distances of the trabecule and iris is detected. The detected distance differences testify to the presence of degree I latent dislocation of the lens.

EFFECT: reliable and precise pre-operative detection of degree I latent dislocation of the lens ensured by a possibility to measure the depth variations of the anterior eye chamber, iris-lens diaphragm shift, ligament instabilities accompanying postural changes.

2 ex

FIELD: medicine.

SUBSTANCE: lachrymal prostaglandin E2 is measured before the implantation and on the 7-10th day following the implantation of a supplementary IOL. The pre- and post-operative prostaglandin concentrations are calculated. If the derived relation is 3.5-4 units, developing pigment dispersion syndrome is predicted.

EFFECT: method enables preventing developing pigment dispersion syndrome and pigment glaucoma in the given category of patients by the reliable prediction of the above syndrome in the early postoperative period.

3 ex

FIELD: medicine.

SUBSTANCE: one month after a phacoemulsification of complicated cataract and an intracapsular implantation of an intraocular lens, 3-4 2mm notches are applied on the periphery of an anterior capsulorrhexis. That is followed by an YAG laser exposure at wave length 1,064 and power 1-2 mJ. If observing the preclinical signs of a contracture of a crystalline lens capsule, an ultrasonic biological microscopy is carried out to state if it is necessary to apply the notches.

EFFECT: method provides the more effective prevention of the above pathology by providing the reliable timely detection of the contracture of the capsular sac of the crystalline lens; the declared effect is selective and only covers the patients with the preclinical signs of the contracture as shown by the ultrasonic biological microscopy; it eliminated the capsular injuries caused by the effect of the surgical instruments and prevents the visual deterioration in the patients with concurrent conditions.

3 ex

FIELD: medicine.

SUBSTANCE: optical coherence tomography of the retinal covers localisation areas of the peripheral dystrophy. An eye ground image is displayed on the screen. A scanning is performed first along the peripheral retinal dystrophy, and then across the same. Signs of the prognostic risk of the peripheral retinal dystrophy are identified on the formed scanning images by means of the image process report 'High Difinition Images'.

EFFECT: according to findings of the non-invasive examination, the method enables identifying the prognostically dangerous forms of the peripheral retinal dystrophy.

3 ex

FIELD: medicine.

SUBSTANCE: invention can be used for diagnosing secondary glaucoma is the patients suffering vascular corneal leukoma. A method involves an optical coherent tomography of an anterior eye segment (OCT AES), an ultrasonic biomicroscopy (UBM) followed by measuring a critical frequency of flashing phosphene extinguishing (CFPE) with a echo biometry. If the OCT AES and UBM findings show the presence of iris-corneal adhesions with a closed angle of the anterior chamber through one or more quadrants, the CFPE values are less than 40 Hz, and the echo biometry shows an increase of an anterio-posterior axis by more than 1.0 mm for one year, secondary glaucoma is diagnosed.

EFFECT: method provides the accurate and objective diagnosis in the patients of the given group with the poorly transparent cornea having irregular curvature, shape and turgor.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely ophthalmology. The method involves the low-intensity EHF exposure at water molecular resonance frequency within the range of 650.5 GHz followed by the radio-response recording. The examination covers an avascular zone of an eyeball in relation to a visual axis, and along four meridians if an applicator aerial displaced 15-20 degrees from the visual axis. Diagnostic signs of the myopia progression include water echo enhancement as compared to a normal value (1.6-1.710-13 Wt/cm2), as well as data difference if observing an echo bias from an optic axis.

EFFECT: method provides higher diagnostic accuracy ensured by considering the volumetric data of a vitreous body.

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to ophthalmology. In order to determine indications for treatment of ophthalmological complications of systemic atherosclerosis by means of method of optic coherent tomography thickness of peripapillary nervous fibres is measured in three segments. If thickness of peripapillary nervous fibres in upper segment is lower than 118.58 mcm, in nasal - lower than 66.58 mcm, in lower segment - lower than 111.83 mcm, in temporal - lower than 66.42 mcm, treatment is considered to be indicated.

EFFECT: method makes it possible to determine indications for treatment of ophthalmological complications of systemic atherosclerosis.

4 dwg, 3 ex, 1 tbl

FIELD: medicine, ophthalmology.

SUBSTANCE: on should carry out iridic optic coherent tomography to determine stromal thickness and density of iris and pigment leaf. At detected inborn stromal underdevelopment and abnormal hypertrophy of pigment leaf one should diagnose Frank-Kamenetsky's glaucoma. In case of normal thickness of iridic pigment leaf and iridic stromal thickening at forming nontransparent connective tissue and decreasing its thickness against the norm it is possible to predict iridic essential mesodermal dystrophy.

EFFECT: higher accuracy of diagnostics.

1 dwg, 2 ex

FIELD: medicine, ophthalmology.

SUBSTANCE: the present innovation deals with introducing a special device into conjunctival cavity that enables to keep this volume. Moreover, as the above-mentioned device one should apply a blepharostat with the help of which one should develop the volume out of natural anatomical ocular structures by separating and lifting patient's eyelids. Application of this method enables to carry out diagnostics more quickly and efficiently.

EFFECT: higher efficiency.

2 dwg

FIELD: medicine.

SUBSTANCE: method involves scanning operation zone at intrascleral level in sagittal plane using high frequency ultrasound. Slice of maximum cavity area is prepared. Cicatricial tissue thickness is determined from this slice above the cavity above its highest point and maximum cavity height. Cavity cross-section being not less than 0.16 mm2 and cicatricial tissue thickness ratio relative to maximum height being not greater than 2:1, conclusion is drawn that plastic operation is indicated.

EFFECT: high accuracy in selecting operation method.

4 dwg, 1 tbl

FIELD: medicine.

SUBSTANCE: method involves carrying out optical coherent iris tomography. Pigmented iris leaf and its stroma thickness is evaluated on tomogram. Iris leaf thickness being normal and iris stroma thickness being reduced and dense, essential mesodermal iris dystrophy is to be diagnosed.

EFFECT: high accuracy of diagnosis.

FIELD: medicine, ophthalmology.

SUBSTANCE: the present innovation deals with the ways to predict vascular pathology of optic nerve (ischemic opticopathies). In real time one should perform ultrasound two-dimensional trial due to measuring the thickness of vascular membrane in posterior pole of one's eyeball being 2-4 mm against optic nerve from the side being opposite to patient's sight and the diameter of retrobulbar section of optic nerve with its membranes at posterior pole of an eyeball at the distance up to 5 mm against ocular membranes. Measurement should be carried out in position of eyeball's abduction.

EFFECT: higher efficiency and accuracy of ultrasound diagnostics.

2 dwg, 3 ex, 1 tbl

FIELD: medicine.

SUBSTANCE: method involves determining blood circulation and microcirculation in eye, measuring diastolic arterial blood pressure and calculating trophic coefficient from formula TC= LBCS*FCN/ Pdiast, where LBCS is the linear blood circulation speed in supratrochlear artery, FCN is the functioning capillary number in 1 mm2 of vision field counted when examining microcirculation stream bed in bulbar eyeball conjunctiva, Pdiast is the diastolic arterial blood pressure in mm of mercury column. TC values being less than 0.74, further dystrophy development is predicted. The value being greater than 0.74, favorable disease development course is predicted.

EFFECT: high accuracy of prognosis.

1 tbl

FIELD: medicine, ophthalmology.

SUBSTANCE: one should carry out ultrasound gray-scale B-scanning at detecting tumor sizes; additionally, it is necessary to carry out chromatic Doppler vascular mapping of choroids melanoma along with detecting the parameters of circulation rate in them. At tumor's height being below 3.5 mm and no vessels in it or maximal systolic circulation rate in tumor vessels being below 7.6 cm/sec and the same tumor height one should consider diode-laser transpupillary thermotherapy to be useful for indication.

EFFECT: higher efficiency of therapy.

2 ex

FIELD: medicine.

SUBSTANCE: method involves diagnosing blood circulation disorders. Mean blood circulation velocity and resistance index are studied by applying Doppler ultrasonography approach. Blood circulation parameters are estimated in the central retinal artery and normalized resistance-velocity index is calculated as RVI=|(RIn-RI')/Rin|/|(Vn-V')/Vn| under condition of V≠Vn, where RIn is the resistance index in the central retinal artery in normal state; Vn is the mean blood circulation velocity in the central retinal artery in normal state; RI' is the resistance index in the central retinal artery under study; V' is the mean blood circulation velocity in the central retinal artery under study. The normalized RVI value being greater than 0.35, proliferative diabetic retinopathy stage is diagnosed at 68% diagnostic accuracy. The value being less than 0.35, non-proliferative diabetic retinopathy stage is diagnosed.

EFFECT: high diagnosis accuracy.

FIELD: medicine, ophthalmology.

SUBSTANCE: one should analyze patient's genealogy, optic coherent tomography of ocular retina. According to tomogram one should evaluate the transparency of photoreceptors layer and its thickness, and, also, retinal thickness in the center. Under condition of autosomo-recessive type of inheritance and availability of retinal thickness in the center being 110±3.6 mcm and thickness of photoreceptors layer being 52.13±1.4 mcm it is possible to predict unfavourable disease flow. And under condition of autosomo-dominant type of inheritance and availability of retinal thickness in the center being 139±2.4 mcm, the thickness of photoreceptors layer being 73.43±2.6 mcm one should predict favorable disease flow. Moreover, in case of both flows of pigment retinitis the transparency of photoreceptors layer is shifted towards white color against standard chromatic scale of the device. The application of the present innovation enables to increase accuracy of detecting the above-mentioned disease in early juvenile age and provides the chance to evaluate its flow.

EFFECT: higher accuracy of prediction.

2 ex

FIELD: medicine, ophthalmology.

SUBSTANCE: one should carry out optic coherent retinal tomography before the onset of therapy and after it in 1 wk and in 1 mo. On a tomogram it is necessary to detect the availability of affected integrity in retinal layers and retinal thickness in the center and along the edge of fovea. In case, it is observed the escape of a defect and restoration of retinal layers and thickened retina in foveolar center up to 100 mcm and more and decreased retinal thickness along the edge of fovea up to 250 mcm and below therapy should be considered to be efficient and sufficient. If a tomogram illustrates decreased retinal defect in combination with decreased retinal thickness along the edge of fovea up to 250 mcm and less one should detect the flattening of the rupture. If a tomogram demonstrates broadened borders of macular rupture and increased retinal thickness along the edge of fovea one should consider the therapy conducted to be inefficient.

EFFECT: higher accuracy of evaluation.

5 dwg, 2 ex

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