Neonatal colour Doppler ultrasound study: normal values of abdominal blood flow velocities in the neonate during the first month of life

2009 ◽  
Vol 39 (4) ◽  
pp. 328-335 ◽  
Author(s):  
Patrizia Papacci ◽  
Carmen Giannantonio ◽  
Francesco Cota ◽  
Caterina Latella ◽  
Carla Maria Semeraro ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Normal Values ◽  
Colour Doppler ◽  
Colour Doppler Ultrasound ◽  
Ultrasound Study ◽  
Blood Flow Velocities ◽  
Flow Velocities

scholarly journals Normal values of cerebral blood flow velocities in neonates

2010 ◽  
Vol 138 (3-4) ◽  
pp. 186-191 ◽  
Author(s):  
Brankica Vasiljevic ◽  
Miroslava Gojnic ◽  
Svjetlana Maglajlic-Djukic ◽  
Olga Antonovic
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Normal Values ◽  
Color Doppler ◽  
Ductus Arteriosus ◽  
Resistance Index ◽  
Severe Hypotension ◽  
The Mean ◽  
Blood Flow Velocities ◽  
Flow Velocities

Introduction. There was used color Doppler ultrasonography (cD-USI), allowing simultaneous examination of parenchymal and vascular cerebral structures. The evaluation of blood flow velocities in cerebral arteries is important in the assessment of cerebral circulation in hypoxic-ischaemic and haemorrhagic brain damage in neonates. Objective. The aim of this study was to estimate normal values of cerebral blood flow velocities (CBFV) and Doppler indices - pulsatility index (PI) and resistance index (RI) - in the anterior cerebral artery (ACA) during the first days of life in infants. Methods. CBFV, PI and RI were obtained during the first week of life with cD-US in 70 infants divided in four groups of gestational age (GA): ?28 gestational weeks (GW); 29-32 GW; 33-36 GW; and ?37 GW. Infants with congenital malformations, severe perinatal asphyxia, cerebral haemorrhagic lesion, DAP or severe hypotension were excluded. Results. The mean GA of infants was 34.5?5.5 GW (range 26-40 GW) and the mean birth weight (BW) was 2540?950 g (range 750-4000 g). In the 1st group of 10 infants, ?28 GW, the mean BW was 950?110 g and values of RI were 0.59?0.10 and PI 1.06?0.080. In the 2nd group of 20 infants, 29-32 GW, the mean BW was 1350?290 g and values of RI were 0.60?0.10 and PI 1.10?0.15. In the 3rd group of 20 infants, 33-36 GW, the mean BW was 1950?750 g and values of RI were 0.63?0.08 and PI 1.15?0.30. In the 4th group of 20 infants, ?37 GW, the mean BW was 3540?950 g and values of RI were 0.65?0.05 and PI 1.18?0.35. Conclusion. Values of CBFV progressively increase with GA and BW due to progressive increase of cardiac output, blood pressure and closing of ductus arteriosus. Values of RI and PI gradually increase with GA and BW as a result of progressive maturation and opening of vascular cerebral bed with a reduction of the cerebrovascular resistance.

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.

Doppler ultrasound of blood flow velocities in ophthalmic and central retinal arteries during the early neonatal period

1998 ◽  
Vol 126 (5) ◽  
pp. 691-697 ◽  
Author(s):  
Patrizia Papacci ◽  
Costantino Romagnoli ◽  
Angela Favuzzi ◽  
Rita Luciano ◽  
Rita Giannini ◽  
...  
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Neonatal Period ◽  
Early Neonatal Period ◽  
Blood Flow Velocities ◽  
Flow Velocities

Reduction of the Clutter Component in Doppler Ultrasound Signals Based on Singular Value Decomposition: A Simulation Study

1997 ◽  
Vol 19 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Léon A.F. Ledoux ◽  
Peter J. Brands ◽  
Arnold P.G. Hoeks
Keyword(s):  
Blood Flow ◽  
Singular Value Decomposition ◽  
Doppler Ultrasound ◽  
Singular Value ◽  
Pulsed Doppler ◽  
Rf Signals ◽  
Blood Flow Velocities ◽  
Value Decomposition ◽  
High Pass ◽  
Flow Velocities

In pulsed Doppler ultrasound systems, the ultrasound radiofrequency (RF) signals received can be employed to estimate noninvasively the time-dependent blood flow velocity distribution within an artery. The RF signals are composed of signals originating from clutter (e.g., vessel walls) and scatterers (e.g., red blood cells). The clutter, which is induced by stationary or slowly-moving structure interfaces, must be suppressed to get reliable estimates of the mean blood flow velocities. In conventional pulsed Doppler systems, this is achieved with a static temporal high-pass filter. The static cut-off frequency and the roll-off of these filters cause the clutter not always to be optimally suppressed. This paper introduces a clutter removal filter that is based on Singular Value Decomposition (SVD). Unlike conventional high-pass filters, which take into account only the information of the temporal direction, the SVD filter makes use of the information of the temporal and spatial directions. The advantage of this approach is that it does not matter where the clutter is located in the RF signal. The performance of the SVD filter is examined with computer-generated Doppler RF signals. The results are compared with those of a standard linear regression (SLR) filter. The performance of the SVD filter is good, especially if a large temporal window (i.e., approximately 100 RF signals) is applied, which improves the performance for low blood flow velocities. A major disadvantage of the SVD filter is its computational complexity, which increases considerably for larger temporal windows.

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.

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