scholarly journals Measurement of ocular blood flow velocity using colour doppler imaging in low tension glaucoma

Eye ◽  
1995 ◽  
Vol 9 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Zahida Butt ◽  
Graham McKillop ◽  
Colm O'Brien ◽  
Paul Allan ◽  
Peter Aspinall
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Ocular Blood Flow ◽  
Doppler Imaging ◽  
Colour Doppler ◽  
Colour Doppler Imaging ◽  
Low Tension Glaucoma ◽  
Low Tension

Reproducibility of retrobulbar blood flow velocity measurements using two different colour Doppler imaging devices

2013 ◽  
Vol 91 ◽  
pp. 0-0
Author(s):  
AC VERTICCHIO VERCELLIN ◽  
CA CUTOLO ◽  
C DELLAFIORE ◽  
M LAVA ◽  
M RAIMONDI ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Doppler Imaging ◽  
Velocity Measurements ◽  
Colour Doppler ◽  
Colour Doppler Imaging ◽  
Retrobulbar Blood Flow

scholarly journals Agreement among three examiners of colour Doppler imaging retrobulbar blood flow velocity measurements

2011 ◽  
Vol 89 (8) ◽  
pp. e631-e634 ◽  
Author(s):  
Panayiota Founti ◽  
Alon Harris ◽  
Domniki Papadopoulou ◽  
Petros Emmanouilidis ◽  
Brent Siesky ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Doppler Imaging ◽  
Velocity Measurements ◽  
Colour Doppler ◽  
Colour Doppler Imaging ◽  
Retrobulbar Blood Flow

Colour Doppler Imaging of Ocular and Orbital Blood Vessels in Retinal Diseases

2011 ◽  
Vol 05 (01) ◽  
pp. 16 ◽  
Author(s):  
Galina Dimitrova ◽  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Central Retinal Artery ◽  
Age Related Macular Degeneration ◽  
Doppler Imaging ◽  
Retinal Diseases ◽  
Colour Doppler ◽  
Colour Doppler Imaging ◽  
Retinal Artery

Colour Doppler imaging (CDI) is an established method for investigation of the ocular and orbital blood flow characteristics. It has been employed for assessment of blood flow parameters in a number of studies that investigated retinal diseases, including vascular pathology, degenerations, dystrophies, tumours, retinal detachment, etc. Decreased retrobulbar blood flow velocity in the central retinal and the short posterior ciliary artery has been reported in diabetic retinopathy. Reduced blood flow velocity in the central retinal artery and vein was also reported in patients with central retinal artery and vein occlusion. In exudative age-related macular degeneration there was an irregular blood flow in the retrobulbar short posterior ciliary arteries that was suggested to play a role in the pathogenesis of the disease. In addition to research, CDI has also been reported as a valuable tool for the clinical management of retinal diseases.

Use of colour Doppler imaging in ocular blood flow research

2011 ◽  
Vol 89 (8) ◽  
pp. e609-e630 ◽  
Author(s):  
Ingeborg Stalmans ◽  
Evelien Vandewalle ◽  
Douglas R. Anderson ◽  
Vital P. Costa ◽  
Ronald E. P. Frenkel ◽  
...  
Keyword(s):  
Blood Flow ◽  
Ocular Blood Flow ◽  
Doppler Imaging ◽  
Colour Doppler ◽  
Colour Doppler Imaging

scholarly journals The effect of preset intraoperative intraocular pressure during phacoemulsification on the blood flow velocity in the central retinal artery

2020 ◽  
Vol 12 (4) ◽  
pp. 5-12
Author(s):  
Yuri V. Takhtaev ◽  
Tatyana N. Kiseleva ◽  
Roman B. Shliakman
Keyword(s):  
Blood Flow ◽  
Intraocular Pressure ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Ocular Blood Flow ◽  
Central Retinal Artery ◽  
Doppler Imaging ◽  
Diastolic Phase ◽  
Retinal Artery ◽  
Central Retinal Vein

Aim. To evaluate the effect of preset elevated intraocular pressure (IOP) level during phacoemulsification on central retina artery and central retinal vein hemodynamics and to determine possible compensatory mechanisms of the ocular blood flow autoregulation in response to intraoperational IOP jump. Methods. This prospective study included 23 cataract patients without concomitant ocular vascular conditions (15 women and 8 men) aged from 62 to 83 years. The mean age was 72.5 5.7 years. In all patients, an intraoperational color duplex scanning in the regimens of color Doppler imaging and pulsed wave velocity imaging using ultrasound scanner Logiq S8 (GE). The blood flow was estimated in retrobulbar vessels: central retinal artery, central retinal vein with maximal systolic velocity, end-diastolic velocity of the blood flow, and resistance index (RI). The investigation was performed under IOP control, which was measured using Icare Pro tonometer, and under blood pressure control using patient monitoring system Draeger Vista 120. In the operating room, ocular blood flow was examined three times: immediately before surgery, straight after the surgical incision sealing at preset intraoperational IOP level, and after IOP normalization and repeated sealing of the corneal tunnel. Results. Under preset intraoperational IOP maintenance on 58.01 8.10 mm Hg level, there was a clinically significant (p 0.05) decrease of blood flow velocity in the central retinal artery. In 30.4% of cases, the blood flow velocity in the central retinal artery during diastolic phase was not registered. The flow velocity in central retinal vein did not change significantly, and did not depend on IOP level (p 0.05). Conclusions. At the 5560 mm Hg IOP level, in humans, compensatory blood flow autoregulation mechanisms in response to intraoperational IOP jumps are absent, up to complete blood flow stop in the central retinal artery at the diastolic phase, and this could be a risk factor for retinal ischemia.

Role Of Colour Doppler Imaging In Early Diagnosis Of Diabetic Retinopathy

2021 ◽  
Vol 23 (09) ◽  
pp. 361-380
Author(s):  
Karthik Krishna Ramakrishnan ◽  
◽  
Anusha Palani Swamy ◽  
Prashant Moorthy ◽  
Praveen K. Sharma ◽  
...  
Keyword(s):  
Blood Flow ◽  
Diabetic Retinopathy ◽  
Vision Loss ◽  
Ocular Blood Flow ◽  
Proliferative Retinopathy ◽  
Doppler Imaging ◽  
Diabetic Patients ◽  
Imaging Method ◽  
Colour Doppler ◽  
Colour Doppler Imaging

Diabetic retinopathy is the most common cause of vision loss among people with diabetes and a leading cause of blindness among working-age adults in India. It is a form of microangiopathy, and is the most common ocular complication seen in diabetic patients. Diabetic retinopathy progresses from non proliferative to proliferative retinopathy. The non proliferative retinopathy is the milder form and it is reversible. As the progression to proliferative retinopathy happens, the patients are symptomatic and become irreversible. Vascular changes and subsequent ocular hemodynamic changes are critical events in the pathogenesis of diabetic retinopathy. Colour doppler imaging is one of the most widely used and well-established techniques for assessing ocular blood flow velocities in the retro bulbar vessels. This is a non-invasive, painless imaging method with highly reproducibility. Estimation of orbital blood flow velocity from colour doppler imaging of the ophthalmic artery and central retinal artery is a technique offering great potential for the identification of early retinopathy in diabetic patients.

scholarly journals Volumetric colour Doppler imaging: a useful tool for the determination of ocular blood flow in glaucoma patients?

Eye ◽  
2005 ◽  
Vol 20 (6) ◽  
pp. 668-673 ◽  
Author(s):  
O Zeitz ◽  
S E Vilchez ◽  
E T Matthiessen ◽  
G Richard ◽  
M Klemm
Keyword(s):  
Blood Flow ◽  
Ocular Blood Flow ◽  
Doppler Imaging ◽  
Colour Doppler ◽  
Colour Doppler Imaging
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