The Impact of Intraocular Pressure Reduction on Retrobulbar Hemodynamic Parameters in Patients with Open-Angle Glaucoma

2011 ◽  
Vol 22 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Ivan Marjanovic ◽  
Natasa Milic ◽  
Antonio Martinez
Keyword(s):  
Intraocular Pressure ◽  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Statistical Significance ◽  
Peak Systolic Velocity ◽  
Doppler Imaging ◽  
Hemodynamic Parameters ◽  
Open Angle ◽  
Diastolic Velocity ◽  
The Impact

Purpose To assess the retrobulbar hemodynamic parameters in the ophthalmic artery (OA), central retinal artery (CRA), and short posterior ciliary arteries (PCA) after decreasing elevated intraocular pressure (IOP) in patients with open-angle glaucoma (OAG) by using color Doppler imaging. Methods A total of 46 eyes from 46 patients with OAG, with elevated IOP, were consecutively included in this prospective study. Peak-systolic velocity, end-diastolic velocity, and Pourcelot resistivity index were assessed in the OA, CRA, and PCA. The IOP was measured with Goldmann applanation tonometer (GAT) and the dynamic contour tonometer (DCT), 3 times respectively. Ocular pulse amplitude (OPA) appeared during the DCT measurement. Results After decreasing the elevated IOP, measured with both GAT and DCT, the retrobulbar parameters showed no differences as compared with baseline measurements. After Bonferroni correction (p≤0.0042, alpha/12), statistical significance appeared in retrobulbar hemodynamics only in DCT (29.3±6.4 vs 15.5±4.2 mmHg), GAT (33.0±8.3 vs 15.8±7.0 mmHg), and OPA measurements (4.1±1.3 vs 2.7±1.4 mmHg), in comparison to baseline. There was no correlation between the changes in IOP measured with either DCT or GAT and the changes in the retrobulbar hemodynamic parameters (p>0.05 for all). Conclusions The results of our study suggested a lack of correlation between the changes in IOP, measured with either DCT or GAT, and the changes in the retrobulbar hemodynamic parameters. The results of our study might suggest that the blood flow disturbances found in glaucoma patients are independent of the IOP.

scholarly journals Retrobulbar hemodynamic parameters in men and women with open angle glaucoma

2014 ◽  
Vol 71 (12) ◽  
pp. 1128-1131 ◽  
Author(s):  
Ivan Marjanovic ◽  
Marija Marjanovic ◽  
Ranko Gvozdenovic ◽  
Dusica Risovic
Keyword(s):  
Intraocular Pressure ◽  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Peak Systolic Velocity ◽  
Doppler Imaging ◽  
Hemodynamic Parameters ◽  
Open Angle ◽  
Cross Sectional ◽  
Diastolic Velocity ◽  
Elevated Intraocular Pressure

Background/Aim. Several factors may have influence on systemic circulation. Additionally, peripheral circulation also demonstrates sex differences, in young women presenting significantly lower finger blood flow in comparison to men of the same age, a finding that disappears in women after menopause. The aim of this study was to compare the retrobulbar hemodynamic parameters measured by means of color Doppler imaging in women and men with open-angle glaucoma and elevated intraocular pressure. Methods. A total of 52 eyes from 52 open-angle glaucoma (OAG) patients, with elevated intraocular pressure (IOP), were included in this cross-sectional study. Peak-systolic velocity (PSV), end-diastolic velocity (EDV), and Pourcelot resistivity index (RI) were assessed in the ophtalmic artery (OA), central retinal artery (CRA), and posterior cilliary arteries (PCA). IOP was measured both with Goldmann Applanation tonometer (GAT) and with the dynamic contour tonometer (DCT), three times respectively. Ocular pulse amplitude (OPA) appeared during the DCT measurement. Results. The retrobulbar hemodynamic parameters did not show any difference between men and post-menopausal women. Conclusion. The results of our study did not find any difference between sexes in patients with open-angle glaucoma and elevated intraocular pressure.

scholarly journals Changes in the retrobulbar hemodynamic parameters after decreasing the elevated intraocular pressure in primary open-angle glaucoma patients

2014 ◽  
Vol 142 (5-6) ◽  
pp. 286-290 ◽  
Author(s):  
Ivan Marjanovic ◽  
Antonio Martinez ◽  
Marija Marjanovic ◽  
Natasa Milic ◽  
Djordje Kontic ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Pearson Correlation ◽  
Resistance Index ◽  
Peak Systolic Velocity ◽  
Doppler Imaging ◽  
Hemodynamic Parameters ◽  
Open Angle ◽  
Elevated Intraocular Pressure

Introduction. Ocular blood flow (OBF) disturbances could be involved both in the pathogenesis and in progression of glaucomatous damage. Objective. The aim of the study was to compare the retrobulbar hemodynamic parameters in the ophthalmic artery (OA), central retinal artery (CRA) and short posterior cilliary arteries (SPCA) after decreasing the elevated intraocular pressure (IOP) in primary open-angle glaucoma (POAG) patients by using color Doppler imaging (CDI). Methods. We examined 60 patients (21 male and 39 female) with diagnosed and treated POAG. Thirtynine patients had increased IOP (>25 mm Hg). Peak-systolic velocity (PSV), end-diastolic velocity (EDV), Pourcelot resistance index (RI), and pulsatility index (PI) were assessed in the OA, CRA, and SPCA. IOP was measured both with the Goldmann Applanation tonometer (GAT) and with the Dynamic Contour tonometer (DCT), three times respectively. Ocular pulse amplitude (OPA) was measured using DCT. Results. The retrobulbar parameters between the baseline and after IOP reduction showed no difference in measurements. After Bonferroni correction (p?0.0056, alpha/9) statistical significance was recorded only in the following retrobulbar hemodynamic parameters; DCT (29.8?6.2 vs. 15.5?5.0), GAT (33.8?9.0 vs. 15.0?6.6) and OPA measurements (4.3?1.0 vs. 3.0?1.6), as compared to the baseline. There was no correlation between the changes in IOP measured with either DCT or GAT and changes in the hemodynamic parameters (p>0.05 for all). Pearson correlation coefficient (95% CI) showed very good correlation for IOP measurements between DCT and GAT: at baseline 0.83 (0.71 to 0.90) and at the end 0.71 (0.55 to 0.83); p<0.0001 for both measurements, but without any difference between them (p>0.05). Conclusion. There was a lack of correlation between the changes in IOP measured with either DCT or GAT and the changes in the hemodynamic parameters.

Color Doppler Imaging Study in Patients with Primary Open-Angle Glaucoma Treated with Timolol 0.5% and Carteolol 2%

2001 ◽  
Vol 11 (3) ◽  
pp. 240-244 ◽  
Author(s):  
P. Montanari ◽  
P. Marangoni ◽  
A. Oldani ◽  
R. Ratiglia ◽  
M. Raiteri ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Resistance Index ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Open Angle ◽  
Significant Difference ◽  
The Mean

Purpose To evaluate with color Doppler imaging (CDI), in patients with primary open-angle glaucoma (PDAG), the possible influence on ocular hemodynamics of a beta-blocking agent with intrinsic sympathomimetic acitivity (carteolol 2%) compared to a beta-blocker agent without this activity. Methods A study was carried out on 20 patients, with bilateral POaG, intraocular pressure (IOP) ≤ 20 mmHg, all treated twice a day with timolol maleate 0.5% ophthalmic solution. The visual field was evaluated (Octopus 2000 perimeter, G1 program) examining the mean sensitivity (MS) and the mean defect (MD). CDI was carried out to evaluate the resistance index of the internal carotid artery (ICA), the ophthalmic artery (OA), the central retinal artery (CRA), and the short posterior ciliary arteries (SPCA). After these examinations, the therapy was changed to carteolol 2% twice a day. After six months of treatment the examinations were repeated. The data were analysed statistically using Student's t test. Results The mean intraocular pressure during treatment with timolol 0.5% was 16.7 ± 1.67 mmHg and 16.33 ± 1.72 mmHg after treatment with carteolol 2%, the difference not being significant (p=0.494). After six months of treatment with carteolol 2% the MS increased significantly from 22.4 ± 2.5 dB to 24.1 ± 1.8 dB (p=0.018), and the mean defect (MD) fell from 5.3 ± 0.8 dB to 4.7 ± 0.6 dB (p=0.011). There was no significant difference in the resistance index of the CA, the OA and the CRA with the two treatments, whereas the resistance index of the SPCA dropped significantly, from 0.80 ± 0.05 to 0.77 ± 0.02 (p = 0.017). Conclusions CDI did not show significant differences in the resistance indexes of the internal CA, the OA, and the CRA after treatment with carteolol 2% but the resistance index of the SPCA was significantly reduced. Carteolol 2% induced significant changes in the perimetric indexes examined, with an increase in MS and a decrease in MD. These findings suggest that the intrinsic sympathomimetic activity of carteolol may reduce peripheral vascular resistance of the SCA, thus improving perfusion of the optic nerve head, with a protective effect on visual function.

scholarly journals Computer-aided identification of novel ophthalmic artery waveform parameters in healthy subjects and glaucoma patients

2016 ◽  
Vol 1 (2) ◽  
pp. 59-69
Author(s):  
Lucia Carichino ◽  
Giovanna Guidoboni ◽  
Alice Chandra Verticchio Vercellin ◽  
Giovanni Milano ◽  
Carlo Alberto Cutolo ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Ophthalmic Artery ◽  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Peak Systolic Velocity ◽  
Resistive Index ◽  
Doppler Imaging ◽  
Healthy Individuals ◽  
Diastolic Velocity ◽  
Computer Aided

Purpose: Arterial waveform parameters (WPs) are commonly used to monitor and diagnose systemic diseases. Color Doppler Imaging (CDI) is a consolidated technique to measure blood velocity profile in some of the major ocular vessels. This study proposes a computer-aided manipulation process of ophthalmic artery (OA) CDI images to classify and quantify WPs that might be significant in the assessment of glaucoma.Methods: Fifty CDI images acquired by four different operators on nine healthy individuals and 38 CDI images of 38 open-angle glaucoma (OAG) patients were considered. An ad-hoc semi-automated image processing code was implemented to detect the digitalized OA velocity waveform and to extract the WPs. Concordance correlation coefficient (CCC), two-sample t-test and Pearson’s correlation coefficient were used to test for similarities, differences and associations among variables.Results: The OA-CDI images manipulation proposed showed a higher concordance between measured peak systolic velocity (PSV) data and extracted PSV data (0.80≤CCC≤0.98) than on end diastolic velocity (EDV) (0.45≤CCC≤0.63) and resistive index (RI) (0.30≤CCC≤0.58) data. In OAG patients, EDV, RI, subendocardial viability ratio (SEVR), period (T), area ratio (f) and normalized distance between ascending and descending limb (DAD/T) were found statistically correlated to at least one of the following factors: gender, age, ocular medications and year of diagnosis. When compared to healthy individuals, OAG patients OA-CDI profiles showed statistically higher values of f (p < 0.001) and DAD/T (p = 0.002) (p-values corrected by age and gender).Conclusion: The proposed computer-aided manipulation of OA-CDI images allowed to identify DAD/T as a novel WP that vary significantly among healthy individuals and OAG patients, and among female and male OAG patients. Future studies on longitudinal OAG data are suggested to investigate the potential of DAD/T to predict severity and progression of the disease.

scholarly journals Impact of Visual Field Testing on Intraocular Pressure Change Trends in Healthy People and Glaucoma Patients

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Mengwei Li ◽  
Bingxin Zheng ◽  
Qi Wang ◽  
Xinghuai Sun
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Repeated Measures ◽  
Healthy Subjects ◽  
Open Angle Glaucoma ◽  
Field Testing ◽  
Automated Perimetry ◽  
Open Angle ◽  
Standard Automated Perimetry ◽  
The Impact

Purpose. To compare the impact of visual field (VF) testing on intraocular pressure (IOP) change trends between healthy subjects and glaucoma patients. Methods. We recruited healthy volunteer subjects who did not have previous ocular diseases and open-angle glaucoma patients who were medically controlled well. IOP in both eyes of each participant was measured by using a noncontact tonometer at five time points: before, immediately after (0 minute), and 10, 30, and 60 minutes after the standard automated perimetry. Repeated measures ANOVA was used to analyze the effect of VF testing on IOP change trends in healthy and glaucoma eyes. Results. Forty healthy subjects (80 eyes) and 31 open-angle glaucoma patients (62 eyes) were included for the study. The baseline IOP of healthy and glaucoma eyes was 16.11 ± 3.01 mmHg and 15.78 ± 3.57 mmHg, respectively. After the VF testing, the IOP in healthy eyes was decreased by 1.5% at 0 minute, 6.5% at 10 minutes (P<0.001), 6.6% at 30 minutes (P<0.001), and 7.0% at 1 hour (P<0.001), indicating that this reduction was sustained for at least 1 hour. However, the IOP in glaucoma eyes was increased by 12.7% at 0 minute (P<0.001) and, then, returned towards initial values 1 hour after the VF testing. Conclusions. IOP change trends after VF field testing between healthy subjects and glaucoma patients were quite different. VF testing led to a mild and relatively sustained IOP decrease in healthy subjects, whereas IOP in open-angle glaucoma patients tended to significantly increase immediately after VF testing and, then, returned to pretest values after 1 hour. These findings indicate that the factors of VF testing should be considered in the clinical IOP measurements.

scholarly journals Correlation of progression of diabetic retinopathy with the alterations in retrobulbar circulation

2013 ◽  
Vol 5 (2) ◽  
pp. 147-153 ◽  
Author(s):  
S Sood ◽  
Subina Narang ◽  
S Kocchhar ◽  
S Sarda ◽  
S Aggarwal ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Normal Population ◽  
Color Doppler ◽  
Case Series ◽  
Peak Systolic Velocity ◽  
Resistive Index ◽  
Doppler Imaging ◽  
Arterial Circulation ◽  
Diastolic Velocity ◽  
Group I

Introduction: Color Doppler Imaging (CDI) is used widely to study retrobulbar circulation. Objectives: To determine the association between progression of diabetic retinopathy (DR) and alterations in retrobulbar arterial circulation using CDI studies. Materials and methods: Prospective observational case series. It is single institutional study of 50eyes of nonproliferative diabetic retinopathy in 50 patients with type II diabetes mellitus. DR was graded according to ETDRS system. Retrobulbar circulation was studied in patients for Peak systolic velocity (PSV), End diastolic velocity (EDV) and Resistive index (RI) in Central retinal artery (CRA), Ophthalmic artery (OA) and Posterior ciliary artery (PCA) using CDI initially and reevaluated after 6 months or later for any change in retinopathy grade and arterial circulation parameters. The patients were grouped as Group I not showing progression of DR and Group II showing progression. The two groups were compared for any significant change in CDI parameters. Results: The baseline resistive indices were higher than normal population. There was significant increase in RI in PCA and CRA in all patients after 6 months. 14 patients (28%) showed progression of DR and 36 (72%) did not show progression of DR. There was no significant association with progression of retinopathy and CDI findings. (p=>0.05). Conclusion: The retrobulbar arterial circulation seems to be affected in all diabetics with DR. The changes appear to be progressive. The CDI findings in arterial circulation however lack predictive power for progression of diabetic retinopathy in non proliferative DR. Nepal J Ophthalmol 2013; 5(10): 147-153 DOI: http://dx.doi.org/10.3126/nepjoph.v5i2.8705

scholarly journals A case of open angle glaucoma secondary to Posner-Schlossman Syndrome

2019 ◽  
Vol 81 (3) ◽  
pp. 29-38
Author(s):  
Andrew J. Rixon ◽  
Rebecca A. Wenig ◽  
Brittany N. Rigdon
Keyword(s):  
Quality Of Life ◽  
Intraocular Pressure ◽  
Case Report ◽  
Chronic Condition ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Preserve Function ◽  
Acute Attacks ◽  
The Impact

This is a case report demonstrating appropriate diagnosis and management of PSS and its possible sequelae. Posner-Schlossman Syndrome is characterized by recurrent, unilateral attacks of significantly increased intraocular pressure. The etiology and pathophysiology of this condition remains unclear. Duration of this chronic condition and the risk of developing secondary open angle glaucoma are directly proportional. The patient and managing optometrist must be aware of the necessity of timely intervention during acute attacks, as well as adherent longitudinal care to preserve function and quality of life. The ensuing case report and review underscores the impact of this disease.

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