Biomedical subjects

J Cmelo

Publications and source records attributed to J Cmelo.

9 recordsLinked to original sources

PubMed2006

[The color Doppler ultrasonography in glaucoma diagnosis].

UNLABELLED: The insufficiency of the autoregulation at the optic nerve's head may cause the glaucoma optic neuropathy (GON). If the long-term stressing exists and an additional endurance arises, the autoregulation may fail and significant changes of the resistance index (RI) at the central retinal artery (CRA) and at the posterior ciliar artery (PCA) can be detected by color flow ultrasonography. Resistivity index represents peripheral resistance. It is displayed in numerical value 0-1. 0 indicates none peripheral resistance, 1 indicates maximal peripheral resistance. The goal of this paper was to determine a risk value of the RI at the CRA and PCA that could suggest possible damaging of the optic nerve. Two groups of the patients were evaluated in the course of 4 years duration of the study. In the I. Group were 72 patients (144 eyes) with GON and with intraocular pressure (IOP) 14-24 mm Hg. The II. Group consisted of 25 healthy men (48 eyes) without diagnosis of GON and with IOP values 14-20 mm Hg. There were RI measurements at all patients at the CRA and CPA at the idle mode and immediately after ordinary addition endurance (performing squatting--Master test). The statistical analysis by T test was evaluated with value: 0.05. CONCLUSION: According to our findings, the difference between RI: 0.12 +/- 0.03 at the CRA at the idle mode and immediately after ordinary addition endurance is significant for damaging of the autoregulation at the optic nerve's head. For assessment of the insufficiency of the autoregulation at the optic nerve's head RI from PCA is not significant.

Adult↗

PubMed2000

[Diagnosis of swollen optic disks using color Doppler ultrasonography] .

The Goal of this study was prospective evaluation of the blood flow parameters-maximal systolic velocity (MSV), minimal diastolic velocity (MDV) and Pourcelot's resistivity index (RI) in patients with swollen optic dis. 63 patients (79 eyes) were examined with swollen optic disc-10 patients (17 eyes) with intracranial hypertension, 12 patients (14 eyes) with pseudoedema of disk of the optic nerve, 7 patients (7 eyes) with inflammation swollen optic disc, 3 patients (6 eyes) with pseudotumor cerebri, 8 patients (12 eyes) with arteritic anterior ischemic optic neuropathy (A-AION) and 23 patients (23 eyes) with nonarteritic anterior ischemic optic neuropathy (N-AION) and 23 patients (23 eyes) with nonarteritic anterior ischemic optic neuropathy (N-AION). All patients had ophthalmological examinations and Color Doppler ultrasonography in central retinal artery (CRA), posterior ciliary artery (PCA), ophthalmic artery (OA) and in central retinal vein (CRV). The blood flow parameters of the swollen optic disc and normal optic disc were not significant changed at intracranial hypertension, pseudooedema cerebri, inflammation swelling, and at pseudotumour od the optic disc. A-AION and N-AION acallocated significant changes of the blood velocities and resistivity index. A-AION: significant increasing resistivity index at CRA, CPA, significant decrease of MSV and MDV and difficult mapping of the CPA in Color doppler mapping. At the fellow eye (without swollen optic disc) was significant decreasing of the blood velocities of the CRA, CPA, but not so much as at the defective eye with swollen optic nerve disk. N-AION: defective eye with swollen optic disc--there were: nonsignificant decreasing of MSV, MDV, significant decreasing of MSV, MDV and increasing of resistivity index of the CRA, CPA at the fellow eye. AO was without significant changes. Color Doppler information allowed to specify diagnosis of A-AION and N-AION.

Blood Flow Velocity↗

PubMed1999

[Tonic pupil].

Authors evaluated the group of 21 patients (22 eyes) with pupillotonia. There were 2 postraumatic pupillotonias, 1 bilateral pupillotonia with systematic polyneuropathy in alcoholism, 6 Adie's pupillotonias and 9 postviral pupillotonias. In 4 one-sided pupillotonias there were finded no traumatic, viral or neurological cause. 2 patients (2 eyes) with traumatic cause, 2 patients with Adie's pupillotonia and 9 patients with viral cause had indicated the marked subjective difficulties in the eyes with pupillotonia--blurred vision, cephalea. After local application of Pilocarpin in 0.05%-0.1% concentration, these patients were indicating the marked improvement of their subjective troubles of the eyes.

Adolescent↗

PubMed1997

[Evaluation of the retrobulbar space in Graves' orbitopathy using color Doppler ultrasonography].

UNLABELLED: Authors evaluated B-scan findings, blood flow velocity of orbital vessels. At vena Orbitalis Superior (VOS) they evaluated width of color echo and course of blood flow only too. CONCLUSION: 1. GO significantly influences blood flow only in VOS-alteration of blood flow velocities = 7-25 cm/s, nonconstant changing of course blood flowing and dilatation of color echo of the VOS, 2. Thickening of the extraocular muscles significantly influences dilatation of color echo of the VOS, what is a sign of worsening of venous drainage in orbital apex. 3. Swollen connective tissue is displayed as extensive hyperintensive, homogeneous echo retrobulbar, connecting always with subjective pressure, pain beyond the eye.

Blood Flow Velocity↗

PubMed1997

[Diagnosis of carotid-cavernous fistula using color Doppler ultrasonography].

The authors evaluated orbital haemodynamics by Colour Doppler flow Information (CDFI), in 4 cases of carotid-venous fistulas (CCF). Significant changes were demonstrated only in the superior orbital vein (SOV) = 1. Changing of course blood flowing-biodirect (as an alternating orthograde and retrograde) blood flow, or constant retrograde blood flow in SOV, independent from Valsalva manoeuver. 2. Pulsating SOV, in spectral analyse as a retrograde blood flow is synchroned with cordial rhythm on electrocardiography record. 3. Dilatation of color echo of the VOS is a nonconstant sign of CCF.

Aged↗

PubMed1996

[Anatomic distribution of anesthetic solutions in the orbit after subconjuctival, parabulbar and retrobulbar administration].

Authors evaluated anatomical distribution of 1% Mesocain solution with subconjuctival (SC), parabulbar (PB) and retrobulbar (RB) applications by ultrasonographic orbital examination. At SC application was not expressive mobilization of bolus. At PB and RB applications were observed dependence between bolus dislocation (mm) and quantity injected bolus (ml). At PB and RB applications were recorded expressive mobilization of injected bolus at orbit.

Anesthetics, Local↗

PubMed1996

[Evaluation of circulatory flow in vessels of the eye and orbit using color duplex ultrasonography].

Duplex ultrasonography is recent imaging, that allows simultaneous 2-dimensional imaging (B-scan) and Doppler evaluation of the blood flow. Information on blood flow is obtained by pulsed Doppler spectral analysis. The blood flow in vessels of our interest is colour coded. Using this technique we examined 140 eyes. 81 eyes in 48 healthy persons were examined. Based on this examinations, the blood velocity standards were calculated for age groups 19-40 and 41-76 y. There are demonstrated pathologic findings by intraocular tumor, tractional retinal detachment and various failures of blood flow in bulbar and orbital vessels.

Adult↗

PubMed1996

[Evaluation of the superior orbital vein using color doppler ultrasonography].

We examined in collection of 66 patients (116 eyes) vena orbitalis superior (VOS) by Colour Doppler flow imaging (CDFI). In 20% was VOS wider than 3.5 mm in patients without subjective problems and without an orbitopathy, with maximum of width 4.9 mm. In patients with retrobulbar pressure, pain, without orbitopathy was dilatation above 3.5 mm in 31% cases, with maximum 5.4 mm. In patients with orbitopathy was dilatation VOS above 3.5 mm already in 85%, with maximum 7.1 mm. We averaged considerable variability of width in examined VOS.

Blood Flow Velocity↗

PubMed1995

[Ultrasonic imaging of the anterior segment of the eye].

Our survey of the anterior segment of the eye by the ultrasound, is based in the usage of the Kitecko, the eye covering gadget, made by Laboratories 3M. The Kitecko opened a new possibilities for us in the localization of the intraocular, RTG noncontrast foreign bodies of the anterior segment, as well obscure optical medium.

Anterior Eye Segment↗