scholarly journals Effects of anti-glaucoma drugs on resistive index of the medial long posterior ciliary artery using color Doppler imaging in Beagle dogs

2011 ◽  
Vol 12 (1) ◽  
pp. 99 ◽  
Author(s):  
Hojung Choi ◽  
Youngwon Lee ◽  
Seongchan Yeon ◽  
Hyojong Lee ◽  
Heechun Lee
Keyword(s):  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Beagle Dogs ◽  
Posterior Ciliary Artery ◽  
Ciliary Artery

scholarly journals Short-Term Effects of Acupuncture on Open-Angle Glaucoma in Retrobulbar Circulation: Additional Therapy to Standard Medication

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Shin Takayama ◽  
Takashi Seki ◽  
Toru Nakazawa ◽  
Naoko Aizawa ◽  
Seri Takahashi ◽  
...  
Keyword(s):  
Open Angle Glaucoma ◽  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Open Angle ◽  
Before And After ◽  
Standard Medication ◽  
Ciliary Artery ◽  
Additional Therapy

Background. The relation between glaucoma and retrobulbar circulation in the prognosis has been indicated.Purpose. To investigate the effects of acupuncture on retrobulbar circulation in open-angle glaucoma (OAG) patients.Methods. Eleven OAG patients (20 eyes with OAG) who were treated by topical antiglaucoma medications for at least 3 months were enrolled. Acupuncture was performed once at acupoints BL2, M-HN9, ST2, ST36, SP6, KI3, LR3, GB20, BL18, and BL23 bilaterally. Retrobulbar circulation was measured with color Doppler imaging, and intraocular pressure (IOP) was also measured at rest and one hour after rest or before and after acupuncture.Results. TheΔvalue of the resistive index in the short posterior ciliary artery (P<.01) and theΔvalue of IOP (P<.01) were decreased significantly by acupuncture compared with no acupuncture treatment.Conclusions. Acupuncture can improve the retrobulbar circulation and IOP, which may indicate the efficacy of acupuncture for OAG.

Color Doppler Imaging of the Retrobulbar Circulation in Age-Related Macular Degeneration

1998 ◽  
Vol 8 (4) ◽  
pp. 234-238 ◽  
Author(s):  
B.M. Hosal ◽  
G. Karakoç ◽  
E. GÜrsel ◽  
M. Çamur
Keyword(s):  
Ophthalmic Artery ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Age Related Macular Degeneration ◽  
Doppler Imaging ◽  
Posterior Ciliary Artery ◽  
Age Related ◽  
Retinal Artery ◽  
Blood Flow Velocities ◽  
Ciliary Artery

Purpose The aim of this study was to assess hemodynamic changes in the retrobulbar circulation in patients with age-related macular degeneration (ARMD). Methods Color Doppler imaging was used to calculate blood flow velocities and vascular resistance of the central retinal artery, short posterior ciliary artery and ophthalmic artery in patients with ARMD and in control patients. Results The average peak systolic velocity was significantly lower in the central retinal artery (p < 0.001), posterior ciliary artery (p < 0.001) and ophthalmic artery (p < 0.01) of the patients with ARMD than in control. End-diastolic blood flow velocities in the retrobulbar arteries of ARMD patients were also significantly lower (p < 0.001) than controls. Gosling's pulsatility index was significantly higher in the ophthalmic artery (p<0.01) and posterior ciliary artery (p < 0.001) of eyes with ARMD. In addition, the resistivity index was significantly higher in all retrobulbar arteries (p < 0.001) of these patients. Conclusions The hemodynamic abnormalities in the retrobulbar circulation suggest that vascular impairment may play a role in the pathogenesis of ARMD.

scholarly journals Evaluation of the Effects of Acupuncture on Blood Flow in Humans with Ultrasound Color Doppler Imaging

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Shin Takayama ◽  
Masashi Watanabe ◽  
Hiroko Kusuyama ◽  
Satoru Nagase ◽  
Takashi Seki ◽  
...  
Keyword(s):  
Blood Flow ◽  
Vascular Resistance ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Posterior Ciliary Artery ◽  
Flow Through ◽  
Significant Change ◽  
Ciliary Artery ◽  
Needle Stimulation

Color Doppler imaging (CDI) can be used to noninvasively create images of human blood vessels and quantitatively evaluate blood flow in real-time. The purpose of this study was to assess the effects of acupuncture on the blood flow of the peripheral, mesenteric, and retrobulbar arteries by CDI. Statistical significance was defined asPvalues less than 0.05. Blood flow in the radial and brachial arteries was significantly lower during needle stimulation on LR3 than before in healthy volunteers, but was significantly higher after needle stimulation than before. LR3 stimulation also resulted in a significant decrease in the vascular resistance of the short posterior ciliary artery and no significant change of blood flow through the superior mesenteric artery (SMA) during acupuncture. In contrast, ST36 stimulation resulted in a significant increase in blood flow through the SMA and no significant change in the vascular resistance of the retrobulbar arteries. Additionally, acupuncture at previously determined acupoints in patients with open-angle glaucoma led to a significant reduction in the vascular resistance of the central retinal artery and short posterior ciliary artery. Our results suggest that acupuncture can affect blood flow of the peripheral, mesenteric, and retrobulbar arteries, and CDI can be useful to evaluate hemodynamic changes by acupuncture.

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.

Evaluation of Resistive Index by Color Doppler Imaging of Orbital Arteries in Type II Diabetes Mellitus Patients with Microalbuminuria

Renal Failure ◽  
2012 ◽  
Vol 34 (6) ◽  
pp. 708-712 ◽  
Author(s):  
Taner Basturk ◽  
Ramazan Albayrak ◽  
Turgay Ulas ◽  
Mehmet Akcay ◽  
Abdulkadir Unsal ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type Ii Diabetes ◽  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Type Ii Diabetes Mellitus ◽  
Doppler Imaging ◽  
Type Ii

scholarly journals Evaluation of resistive index using color Doppler imaging of orbital arteries in geriatric patients with hypertension

2014 ◽  
Vol 62 (6) ◽  
pp. 671 ◽  
Author(s):  
Ali Akal ◽  
Tugba Goncu ◽  
Ekrem Karakas ◽  
FatimaNurefsan Boyaci ◽  
Abdulgafur Bata ◽  
...  
Keyword(s):  
Geriatric Patients ◽  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Doppler Imaging

RI in central retinal artery as assessed by CDI does not correspond to retinal vascular resistance

2001 ◽  
Vol 280 (4) ◽  
pp. H1442-H1447 ◽  
Author(s):  
Elzbieta Polska ◽  
Karl Kircher ◽  
Paulina Ehrlich ◽  
Pia V. Vecsei ◽  
Leopold Schmetterer
Keyword(s):  
Vascular Resistance ◽  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Central Retinal Artery ◽  
Doppler Imaging ◽  
Mean Flow ◽  
Average Decrease ◽  
Ocular Perfusion ◽  
Retinal Artery

The aim of the present study was to investigate the association between ultrasound Doppler measurements of resistive index (RI) in the central retinal artery and retinal vascular resistance ( R) assessed with laser Doppler velocimetry, vessel size measurement, and calculation of ocular perfusion pressure (PP) in healthy subjects. An increase in vascular resistance was induced by inhalation of 100% O2. During hyperoxia no significant changes in PP were observed. Mean flow velocity in main retinal veins was reduced by −27.5 ± 2.0%. The average decrease in diameter was −11.5 ± 1.0%. R, which was calculated as the ratio of PP to flow rate, increased by 97.6 ± 7.7%. RI increased as well, but the effect was much smaller (6.6 ± 2.2%). In addition, a negative correlation was found between baseline values of R and RI ( r = −0.83). During hyperoxia R and RI were not associated. In conclusion, our data indicate that RI as assessed with color Doppler imaging in the central retinal artery is not an adequate measure of R.

scholarly journals Color Doppler Evaluation of Arterial Resistive Index in Infantile Hemangioma: A Useful Parameter to Monitor the Response to Oral Propranolol?

2021 ◽  
Vol 9 ◽  
Author(s):  
George Koshy Parapatt ◽  
Teresa Oranges ◽  
Guglielmo Paolantonio ◽  
Lucilla Ravà ◽  
Simona Giancristoforo ◽  
...  
Keyword(s):  
Color Doppler ◽  
Resistive Index ◽  
Color Doppler Imaging ◽  
Infantile Hemangioma ◽  
Vascular Tumor ◽  
Color Doppler Ultrasound ◽  
Doppler Imaging ◽  
Treatment Control ◽  
The Mean ◽  
Oral Propranolol

Infantile hemangioma (IH) is the most common benign vascular tumor in childhood. In more than 85% of all cases, IHs undergo spontaneous involution, but nearly 10–12% of IHs develop complications and require immediate therapy. Oral propranolol is currently the first-line treatment for IHs. Color Doppler ultrasound is the gold standard in the diagnosis of deep IH, and it is used to evaluate the morphological change and the modification of vascularization that occur during its evolution and treatment. To date, only few data in the literature described the changes of intralesional arterial resistive index (RI) during treatment with propranolol; particularly, some authors have shown an increase of intralesional arterial RI in IHs with clinical regression during treatment with propranolol. The objective of this paper is to evaluate the changes of RI of the intralesional arteries of the IHs during the treatment with oral propranolol. We retrospectively analyzed a total of 64 IHs in 60 patients treated with oral propranolol with a good clinical response. Gray-scale ultrasonography and color Doppler imaging were performed before and during the therapy. The intralesional RIs were measured before and during the treatment. For each lesion, we recorded the RI values, and then we calculated the mean RI value for any single lesion. We compared the mean RI value observed at the baseline with the mean RI value of the last detectable sampling at color Doppler. We also compared between them the mean RI values observed during intermediate ultrasound. The RI values were compared in 44 lesions, with at least two significant samplings of RI. In the 44 lesions compared, we did not find statistically significant variations in the mean RI values between the baseline control and the values recorded at the last post-treatment control. The time trend of mean RI values of the intermediate color Doppler analysis performed between the first pre-treatment control and the last measurable control did not show any statistically significant variation in the trend of mean RI values. Contrarily to what has been described by some authors, in our experience, we have not observed an increase of RI in IHs treated with oral propranolol.

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