scholarly journals Retrobulbar Hemodynamic Effects of Nipradilol in Normal and Normal-Tension Glaucoma Eyes

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Mitsushi Fukukita ◽  
Masashi Ido ◽  
Syunsuke Osawa ◽  
Mikio Sasoh ◽  
Motoyasu Furuta ◽  
...  
Keyword(s):  
Color Doppler ◽  
Resistance Index ◽  
Color Doppler Imaging ◽  
Normal Tension Glaucoma ◽  
Ocular Blood Flow ◽  
Doppler Imaging ◽  
Eye Drops ◽  
Ciliary Arteries ◽  
Retinal Artery ◽  
Retrobulbar Hemodynamics

Purpose. To investigate the effects of nipradilol on retrobulbar hemodynamics.Methods. We investigated normal and normal-tension glaucoma (NTG) eyes. Topical nipradilol (one eye) and placebo eye drops (fellow eye) were instilled for 1 week in volunteers. Nipradilol was also instilled in NTG patients. Ultrasound color Doppler imaging for the posterior vessels was performed before, 2 hr, 1 week (for normal), and at 4 weeks (for NTG).Results. In normal eyes, there were significant decreases in the resistance index (RI) for the temporal short posterior ciliary arteries (PCA) at 2 hr and for the ophthalmic arteries at 1 week. There were no significant changes in the placebo-treated eyes. In the NTG eyes, there was a significant decrease in the RI for the central retinal artery, nasal, and temporal PCA at 2 hr and 4 weeks.Conclusion. Short-term observations found that nipradilol increased the ocular blood flow in normal and NTG eyes.

scholarly journals Comparison of Color Doppler Imaging Criteria for the Ophthalmic Artery and Central Retinal Artery in Infants with Retinopathy of Prematurity with and Without Plus Disease

2021 ◽  
Vol 18 (2) ◽  
Author(s):  
Marzieh Soleimani ◽  
Seyed Ehsan Ghetmiri ◽  
Mohammad Hossein Ahrar Yazdi
Keyword(s):  
Retinopathy Of Prematurity ◽  
Ophthalmic Artery ◽  
Color Doppler ◽  
Resistance Index ◽  
Color Doppler Imaging ◽  
Central Retinal Artery ◽  
Doppler Imaging ◽  
Significant Difference ◽  
Retinal Artery ◽  
The Mean

Background: Color Doppler imaging (CDI) is a non-aggressive and safe technique for the clinical management of retinal diseases. Recently, the number of infants with retinopathy of prematurity (ROP) has increased due to the incidence of premature births. Objectives: This study aimed to compare the CDI criteria for the ophthalmic artery (OA) and central retinal artery (CRA) in ROP infants with and without plus disease. Patients and Methods: In this case-control study, 42 premature infants (21 infants with plus disease and 21 infants without plus disease) underwent CDI. The arterial CDI parameters, including end-diastolic velocity (EDV), pulsatility index (PI), resistance index (RI), and peak systolic velocity (PSV), were measured in these patients. After collecting the data, t-test and chi-square tests were used for data analysis. P < 0.05 was considered to be statistically significant. Results: The mean EDV of CRA in patients with and without plus disease was 4.35 ± 1.00 and 5.27 ± 1.02 cm/sec, respectively (P = 0.005). The mean PSV of CRA in patients with and without plus disease was 15.65 ± 3.35 and 18.39 ± 4.39 cm/sec, respectively (P = 0.029). However, no significant difference was found between the two groups in terms of PSV or EDV of OA (P > 0.05). Also, no significant difference was observed between the two groups considering the RI and PI of CRA and OA (P > 0.05). Conclusion: According to the findings of this study, CDI criteria, such as EDV and PSV of CRA, were significantly lower in infants with plus disease as compared to those without plus disease. Since detecting the early stages of plus disease is a challenge for ophthalmologists, assessment of these criteria can be helpful for differentiation of these two subgroups of patients. However, further studies with a larger sample size are needed to determine the cutoff value.

scholarly journals Role of Color Doppler Imaging in Early Diagnosis and Prediction of Progression in Glaucoma

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Fatima Jimenez-Aragon ◽  
Elena Garcia-Martin ◽  
Raquel Larrosa-Lopez ◽  
Jose M. Artigas-Martín ◽  
Pilar Seral-Moral ◽  
...  
Keyword(s):  
Risk Factors ◽  
Early Diagnosis ◽  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Roc Curves ◽  
Doppler Imaging ◽  
Operating Characteristics ◽  
Diastolic Velocity ◽  
Retinal Artery

This longitudinal and prospective study analyzes the ability of orbital blood flow measured by color Doppler imaging (CDI) to predict glaucoma progression in patients with glaucoma risk factors. Patients with normal perimetry but having glaucoma risk factors and patients in the initial phase of glaucoma were prospectively included in the study and divided, after a five-year follow-up, into two groups: “Progression” and “No Progression” based on the changes in the Moorfields regression analysis (MRA) classification of Heidelberg retina tomograph (HRT). An orbital CDI was performed in all patients and the parameters obtained were correlated with changes in HRT. A logistic discrimination function (LDF) was calculated for ophthalmic artery (OA) and central retinal artery (CRA) parameters. Receiver operating characteristics curves (ROC) were used to assess the usefulness of LDFs to predict glaucomatous progression. A total of 71 eyes were included. End-diastolic velocity, time-averaged velocity, and resistive index in the OA and CRA were significantly different (P<0.05) between the Progression and No Progression groups. The area under the ROC curves calculated for both LDFs was of 0.695 (OA) and 0.624 (CRA). More studies are needed to evaluate the ability of CDI to perform early diagnosis and to predict progression in glaucoma in eyes.

scholarly journals Color Doppler Imaging Analysis of Ocular Blood Flow Velocities in Normal Tension Glaucoma Patients: A Meta-Analysis

2015 ◽  
Vol 2015 ◽  
pp. 1-24 ◽  
Author(s):  
Shuo Xu ◽  
Shouyue Huang ◽  
Zhongjing Lin ◽  
Wangmin Liu ◽  
Yisheng Zhong
Keyword(s):  
Color Doppler ◽  
Meta Analysis ◽  
Color Doppler Imaging ◽  
Normal Tension Glaucoma ◽  
Diagnostic Value ◽  
Doppler Imaging ◽  
Diagnostic Tools ◽  
Significant Heterogeneity ◽  
Cochrane Central Register ◽  
Ischemic Change

Background. To evaluate the potential diagnostic value of CDI of retrobulbar hemodynamic changes in NTG patients.Methods. Relevant publications which included PSV, EDV, and RI of OA, CRA, NPCA, and TPCA in NTG patients and normal controls measured by CDI were retrieved from the Cochrane Central Register of Controlled Trials, PubMed, the ISI Web of Knowledge, and EMBASE from 1990 to 2014. Subgroup analyses were made based on IOP-lowering medications uses.Result. In OA, there was significant decrease of PSV with moderate heterogeneity (P<0.00001,I2=49%) and significant decrease of EDV with significant heterogeneity (P=0.0005,I2=87%) in NTG patients. In CRA, similar results of PSV (P<0.00001,I2=42%) and EDV (P<0.00001,I2=80%) were detected. Significant decrease of PSV and EDV with significant heterogeneity was also found in both NPCA (P<0.0001,I2=70%;P<0.0001,I2=76%; resp.) and TPCA (P<0.00001,I2=54%;P<0.00001,I2=65%; resp.). Statistically significant increases of RI were found in CRA (P=0.0002,I2=89%) and TPCA (P=0.02,I2=81%) with significant heterogeneities, though RI in OA (P=0.25,I2=94%) and in NPCA (P=0.15,I2=86%) showed no statistical changes with significant heterogeneities.Conclusions. Ischemic change of retrobulbar hemodynamics is one of the important manifestations of NTG. Hemodynamic parameters measured by CDI might be potential diagnostic tools for NTG.

Effect of Intravitreal Aflibercept on Central Retinal Arterial Blood Flow in Type 1 Retinopathy of Prematurity

2017 ◽  
Vol 27 (6) ◽  
pp. 751-755 ◽  
Author(s):  
Emine A. Sukgen ◽  
Gökhan Söker ◽  
Yusuf Koçluk ◽  
Bozkurt Gülek
Keyword(s):  
Blood Flow ◽  
Retinopathy Of Prematurity ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Intravitreal Aflibercept ◽  
Retinal Artery ◽  
The Mean ◽  
Type 1 Rop

Purpose To evaluate the blood flow changes of the central retinal artery measured with color Doppler imaging (CDI) in infants receiving intravitreal aflibercept (IVA) for treatment of type 1 retinopathy of prematurity (ROP). Methods Patients with type 1 ROP were assessed prospectively by CDI following IVA. Color Doppler imaging was used to measure the peak systolic velocity, end diastolic velocity (EDV), pulsatility index (PI), and resistivity index (RI) of the central retinal artery (CRA) before IVA injection and 1 hour, 1 week, and 1 month after injection. Results A total of 29 eyes of 15 infants were included in this study. The mean gestational age at birth was 28.62 ± 2.48 weeks and the mean birthweight was 1,198.62 ± 348.99 g. All treated eyes showed complete regression of ROP and peripheral retinal vascularization continued. Measurements of EDV-CRA, RI-CRA, and PI-CRA showed significant changes after IVA treatment. Conclusions This study showed that IVA is an effective treatment for type 1 ROP. After IVA treatment, vascular resistance increases, ocular blood flow decreases, and changes in hemodynamic parameters of CRA may remain for a month. Further studies are needed to evaluate the effect of anti-vascular endothelial growth factor agents on ocular hemodynamics in infants with ROP.

Clinical Evaluation of the Neuroprotective Effect of α-Tocopherol against Glaucomatous Damage

2007 ◽  
Vol 17 (4) ◽  
pp. 528-533 ◽  
Author(s):  
K.N. Engin ◽  
G. Engin ◽  
H. Kucuksahin ◽  
M. Oncu ◽  
G. Engin ◽  
...  
Keyword(s):  
High Performance ◽  
Neuroprotective Effect ◽  
Color Doppler ◽  
Antioxidant Properties ◽  
Visual Fields ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Glaucomatous Damage ◽  
Group A ◽  
Ciliary Arteries

Purpose To evaluate the vasoregulatory effect of antioxidant α-tocopherol on retina via protein kinase C pathway. Methods Thirty glaucomatous patients (60 eyes) were included in this study. The patients were divided into three groups. For patients in Group A, tocopherol was not supplemented in their therapy. Patients in Groups B and C received 300 and 600 mg/day of oral α-tocopherol acetate, respectively. The ultimate blood tocopherol levels were confirmed via high-performance liquid chromatography assay. Progression of the disease for each subject was monitored via visual field measurements and color Doppler imaging of ophthalmic and posterior ciliary arteries at the beginning and at the 6th and 12th months of this study. Results The average differences between the pulsatility indexes (PI) and resistivity indexes (RI) of both ophthalmic arteries (OA) and posterior ciliary arteries (PCA) of Groups B and C were significantly lower than those of Group A at months 6 and 12. In trial groups, RI decreases observed in PCAs at months 6 and 12 and PI decreases observed in OAs at the 6th month were statistically significant. Differences of mean deviations with visual fields in Groups B and C were highly significantly lower than that of Group A. Conclusions α-Tocopherol deserves attention beyond its antioxidant properties for protecting retina from glaucomatous damage.

scholarly journals The Effect of Nebulized Dorzolamide/Timolol Fixed Combination Mist versus Drops on Retrobulbar Blood Flow and Intraocular Pressure in Glaucoma Patients

Medicina ◽  
2013 ◽  
Vol 49 (7) ◽  
pp. 48
Author(s):  
Ingrida Janulevičienė ◽  
Lina Šiaudvytytė ◽  
Rūta Baršauskaitė ◽  
Vaida Dilienė ◽  
Loreta Kuzmienė ◽  
...  
Keyword(s):  
Blood Flow ◽  
Intraocular Pressure ◽  
Fixed Combination ◽  
Color Doppler ◽  
Resistance Index ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Ocular Irritation ◽  
Ocular Side ◽  
Retrobulbar Blood Flow

Objective. The aim of this study was to evaluate intraocular pressure (IOP), retrobulbar blood flow (RBF), and ocular side effects after the application of topical dorzolamide/timolol fixed combination (DTFC) drops vs topical nebulized DTFC mist in patients with primary openangle glaucoma. Material and Methods. A total of 15 POAG patients were enrolled in a prospective study. Retrobulbar blood flow was measured in the ophthalmic (OA) and central retinal (CRA) arteries using color Doppler imaging. DTFC mist or drops were applied to the experimental eye, and it was examined after 15 and 60 minutes. DTFC mist was applied 6 times for 30 seconds using a misting device. Results. DTFC mist significantly increased peak-systolic (PSV) and end-diastolic (EDV) velocities after 15 and 60 minutes in both the arteries (OA: increase of 12.5% and 9.6% in PSV, P=0.01; increase of 25.8% and 23.1% in EDV, P=0.03; CRA: increase of 11.5% and 8.7% in PSV, increase of 32% and 21.6% in EDV, respectively, P<0.05). DTFC drops had a similar effect on PSV and EDV in the CRA after 15 and 60 minutes (increase of 8.1% and 9.6% in PSV; increase of 17.1% and 23% in EDV, respectively, P=0.03), but a significant effect on PSV and EDV in the OA was documented only after 15 minutes (increase of 9% and 21.4%, respectively, P=0.02). DTFC mist reduced the resistance index in the CRA after 15 and 60 minutes (decrease of 8.5% and 10.2%, respectively, P=0.04). Both methodologies showed a significant decrease in IOP after 15 and 60 minutes (P<0.05). All patients complained of ocular irritation after drop application, and 1 patient complained of general weakness after mist treatment. Conclusions. Nebulized DTFC mist significantly reduced IOP and increased blood flow in the OA and the CRA, causing no ocular irritation as compared with traditional DTFC drop methodology.

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