Usefulness of orbital colour Doppler ultrasound in vascular-related monocular vision loss

2021 ◽  
pp. 1358863X2199321
Author(s):  
Gerardo Ruiz-Ares ◽  
Blanca Fuentes ◽  
Jorge Rodríguez-Pardo de Donlebún ◽  
Maria Alonso de Leciñana ◽  
Raquel Gutiérrez-Zúñiga ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Vision Loss ◽  
Monocular Vision ◽  
Central Retinal Artery ◽  
Doppler Imaging ◽  
Colour Doppler ◽  
Colour Doppler Ultrasound ◽  
Transient Monocular Blindness ◽  
Retinal Artery

Acute, painless, monocular vision loss (APMVL) usually has a vascular aetiology. We conducted a prospective observational study from 2011 to 2018 to analyse the added value of colour Doppler imaging to assess orbital vessel blood flow in the diagnosis of APMVL. The study included 67 patients (39 [58.2%] men; mean age, 65.9 years [SD 13.7]) with APMVL evaluated at the Neurosonology Laboratory within the first 5 days of symptom onset, who were classified as having either transient or persistent monocular blindness. The blood flow in the ophthalmic and central retinal arteries was assessed using colour Doppler ultrasound with a linear 7.5-MHz transducer. Thirty-three (49.3%) patients presented transient monocular blindness, with reduced blood flow in either the ophthalmic or central retinal artery. The group with persistent vision loss included 24 cases of central retinal artery occlusion (CRAO) and 10 cases of ischaemic optic neuropathy (35.8% and 14.9%, respectively, of the total sample). These patients were older and had a higher prevalence of hypertension and mild carotid atherosclerosis. Orbital colour Doppler ultrasound (OCDUS) clarified the mechanism/cause of the ischaemia in 11 (16.4%) patients and showed abnormal flow in 46 (68.7%) patients, confirming the vascular origin in 19 (57.6%) of the transient monocular blindness cases. Lower peak systolic velocity was observed in patients with CRAO ( p < 0.001), and a velocity < 10 cm/s in the central retinal artery was independently associated with the diagnosis of CRAO. OCDUS can be helpful in confirming the vascular cause and identifying the aetiology of APMVL.

100 Relationship between corpus luteum blood flow evaluated via colour Doppler ultrasound and pregnancy rate in bovine embryo transfer recipients

2020 ◽  
Vol 32 (2) ◽  
pp. 176
Author(s):  
M. K. Sermersheim ◽  
B. R. Lindsey ◽  
L. M. Naves ◽  
M. Rubessa ◽  
M. B. Wheeler
Keyword(s):  
Blood Flow ◽  
Medical Imaging ◽  
Corpus Luteum ◽  
Pregnancy Rate ◽  
Embryo Transfer ◽  
Doppler Ultrasound ◽  
Doppler Imaging ◽  
Bovine Embryo ◽  
Colour Doppler ◽  
Colour Doppler Ultrasound

The advent of colour Doppler ultrasound has allowed evaluation of blood flow to bodily tissues. This novel technology is being tested as a tool to improve efficiency in a variety of livestock reproduction programs. The objective of the present study was to evaluate the relationship between blood flow to the ovarian corpus luteum (CL), imaged via colour Doppler ultrasound, and pregnancy rate in crossbred dairy recipients for embryo transfer (ET). Oestrous cycles of Bos indicus×Bos taurus dairy heifers (n=90, 16-24 months of age) were synchronized for embryo transfer on Days 7-8. Immediately before ET, heifers were palpated for the presence of ovarian CL and CL papillae. Presence of CL, CL papillae, and CL lacunae were confirmed via transrectal B-mode ultrasound (Ibex EVO I, E. I. Medical Imaging). Transrectal colour Doppler ultrasound (Ibex EVO I, E. I. Medical Imaging) was used to evaluate blood flow to the CL. Invitro-produced (IVP) blastocysts (qualities I and II) were transferred to the uterine horn ipsilateral to the CL. All palpation, imaging, and embryo transfer was performed by a single technician. Pregnancy was determined via transrectal ultrasound 24-32 days post-embryo transfer (31-39 days of embryo age). Blood flow to the CL was split into three categories: high, median, and low. Presence or absence of two additional CL structures, CL papillae and lacunae, were recorded. Fisher's exact test was used to evaluate data. Statistical differences were considered significant at P&lt;0.05. The overall pregnancy rate was determined to be 40%, 36 out of 90. Pregnancy rates were similar in high (33.9%, 20 of 59), median (59.09%, 13 of 22), and low (33.33%, 3 of 9) blood flow categories. Consistent with previous studies, absence of CL papillae and presence of CL lacunae at the time of ET did not affect pregnancy rate. Doppler blood flow, papillae, and lacunae were also evaluated together in each possible combination. Only one outlier was present; all other differences were not significant. The highest pregnancy rate (66.67%, 10 of 15) was observed in recipients with CLs with median Doppler blood flow, a palpable CL papillae, and no CL lacunae. A larger sample size is required to determine the accuracy of this measurement. In conclusion, recipients with high to low CL blood flow are suitable for IVP embryo transfer programs. Alone, colour Doppler imaging of the CL does not predict pregnancy rate.

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.

Analysis of Clinical Diagnostic Value of High Frequency Colour Doppler Ultrasound for Abdominal Wall Endometriosis

2021 ◽  
Vol 11 (3) ◽  
pp. 1004-1012
Author(s):  
Xiuchun Zhang
Keyword(s):  
Blood Flow ◽  
Abdominal Wall ◽  
Doppler Ultrasound ◽  
High Frequency ◽  
Subcutaneous Fat ◽  
Diagnostic Methods ◽  
Surrounding Tissue ◽  
Colour Doppler ◽  
Abdominal Wall Endometriosis ◽  
Colour Doppler Ultrasound

Abdominal wall endometriosis is a common endometriosis, which is located outside the endometrium, such as the myometrium or subcutaneous fat layer of the abdominal wall, forming a mass, active and infiltrating into the surrounding tissue, accompanied by menstrual pain, and seriously affecting the quality of life of patients. With the increasing operation of caesarean section and other traumatic operations, the incidence rate of abdominal wall endometriosis is increasing. Because of the variety of clinical manifestations of abdominal wall endometriosis, there are many kinds of diagnostic methods. Choosing the appropriate diagnostic methods to confirm abdominal wall endometriosis has become the primary work of diagnosis and treatment of abdominal wall endometriosis. This paper discusses the clinical value of high frequency colour doppler ultrasound in the diagnosis of abdominal wall endometriosis. Compared with the diagnosis of ordinary ultrasound and high frequency colour doppler ultrasound, the location, shape, size, boundary, internal echo, blood flow velocity, blood flow resistance and other parameters of the mass in the focus were observed. It is proved that the application of high-frequency colour doppler ultrasound can greatly improve the ultrasonic diagnosis rate of abdominal wall endometriosis, and it is non-invasive, radiation-free, low price, easy for patients to accept. It provides a high value clinical diagnosis basis for the early detection and treatment of abdominal wall endometriosis.

scholarly journals Evaluation of radial and ulnar artery blood flow after radial artery decannulation using colour Doppler ultrasound

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Li-jia Liu ◽  
Hong-mei Zhou ◽  
Huan-liang Tang ◽  
Qing-he Zhou
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Radial Artery ◽  
Repeated Measures ◽  
Peak Systolic Velocity ◽  
Ulnar Artery ◽  
Artery Blood Flow ◽  
Colour Doppler ◽  
Female Sex ◽  
Colour Doppler Ultrasound

Abstract Background There is a lack of reports in the literature regarding changes in radial artery blood flow after decannulation. The objective of this study was to investigate changes in radial and ulnar artery blood flow after radial artery decannulation using Doppler ultrasound and to explore the factors that influence radial artery blood flow recovery. Methods In current observational study, we used colour Doppler ultrasound to measure the cross-sectional area of the radial (SR) and ulnar artery (SU) and peak systolic velocity of the radial (PSVR) and ulnar artery (PSVU) for both hands at four time points in patients with radial artery cannulation: pre-cannulation (T0), 30 min after decannulation (T1), 24 h after decannulation (T2), and 7 days after decannulation (T3). Repeated measures analysis of variance and logistic regression analysis were performed to analyse the data. Results Overall, 120 patients were included in the present study. We obtained the following results on the side ipsilateral to the cannulation: compared with T0, the ratio of PSVU/PSVR increased significantly at T1 and T2 (p < 0.01); compared with T1, the ratio of PSVU/PSVR decreased significantly at T2 and T3 (p < 0.01); compared with T2, the ratio of PSVU/PSVR decreased significantly at T3 (p < 0.01). Female sex (OR, 2.76; 95% CI, 1.01–7.57; p = 0.048) and local hematoma (OR 3.04 [1.12–8.25]; p = 0.029) were factors that were significantly associated with the recovery of radial artery blood flow 7 days after decannulation. Conclusions There was a compensatory increase in blood flow in the ulnar artery after ipsilateral radial artery decannulation. Female sex and local hematoma formation are factors that may affect the recovery of radial artery blood flow 7 days after catheter removal.

Sign in / Sign up

Export Citation Format

Share Document