scholarly journals A Preliminary Study of Neonatal Cranial Venous System by Color Doppler

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Lu Yang Liu ◽  
Jin Ling Hong ◽  
Chang Jun Wu
Keyword(s):  
Blood Flow ◽  
Color Doppler ◽  
Venous System ◽  
Cerebral Veins ◽  
Venous Sinuses ◽  
Sagittal Sinus ◽  
Examination Time ◽  
Total Examination Time ◽  
Blood Flow Velocities ◽  
Flow Velocities

Aim. To present anatomic data in the ultrasound planes for the identification of the major veins and the venous sinuses in cerebrum and to establish the sonographic normal reference values for the visualization of vein vessels and vein sinuses and blood flow velocities. Methods. This study involved 55 healthy full-term neonates for transfontanellar color Doppler sonography. The imaging included both sagittal and coronal planes with LA332E probe, supplemented with PA240 probe as necessary. As low as reasonably achievable (ALARA) principle was obeyed, limiting Doppler exposure time and maximizing signal intensity by increasing gain rather than outputting transducer power settings. The output power was kept at a minimum level consistent with recording an adequate signal. Keeping the newborns in calm state, the total examination time which every neonate required was less than 5 min. All images were stored also in a workstation for further analysis. The description statistics and t-test for statistical analysis were used. Result. In all studied cases (100% cases), subependymal veins (SV), internal cerebral veins (ICV), Galen vein (GV), straight sinus (SS), superior sagittal sinus (SSS), and transverse sinuses (TS) were visualized. The visualization percentages of inferior sagittal sinus (ISS) or basal veins/Rosenthal veins (BV/RV) were lower than 100%. Based on vessel visualization percentage from high to low, the vessels were ordered as follows: SV, ICV, BV, SS, TS, ISS, and SSS. In SSS and TS, the pulsation percentage was 100%. The descending percentages of vessel pulsation were noted in SS, BV, ICV, and SV. On the basis of the mean of maximum velocities of the vessels from low to high, the vessels were ordered as follows: ISS, BV-L, BV-R, ICV-R, ICV-L, SV-L, SV-R, SSS, TS-L, TS-R, and SS. Conclusion. The measurements percent of visualization of cerebral deep veins was higher than the percent of cerebral venous sinuses. The pulsation percent of measurement and the velocities of cerebral venous sinuses were absolutely higher than the cerebral deep venous system. The pairs of vascular blood flow velocities were nonsignificantly different from one another.

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.

Neonatal color Doppler US study: Normal values of cerebral blood flow velocities in preterm infants in the first month of life

2006 ◽  
Vol 32 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Costantino Romagnoli ◽  
Carmen Giannantonio ◽  
Maria Pia De Carolis ◽  
Francesca Gallini ◽  
Enrico Zecca ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Preterm Infants ◽  
Normal Values ◽  
Color Doppler ◽  
Doppler Us ◽  
Color Doppler Us ◽  
Blood Flow Velocities ◽  
Flow Velocities

Influence of various mixtures of breathing gases on ocular blood flow velocities obtained by color Doppler imaging

1998 ◽  
Vol 95 (4) ◽  
pp. 225-228 ◽  
Author(s):  
Frank Schüttauf ◽  
Ulrich Cobet ◽  
Albrecht Klemenz ◽  
Albrecht Krause
Keyword(s):  
Blood Flow ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Ocular Blood Flow ◽  
Doppler Imaging ◽  
Blood Flow Velocities ◽  
Flow Velocities

Color Doppler Ultrasound in Ocular Behçet's Disease

1997 ◽  
Vol 7 (3) ◽  
pp. 256-261 ◽  
Author(s):  
O. Uçakhan ◽  
M. Salih ◽  
S. Altan ◽  
O. Özdemir
Keyword(s):  
Blood Flow ◽  
Behçet’S Disease ◽  
Behcet’S Disease ◽  
Behçet's Disease ◽  
Color Doppler ◽  
Control Group ◽  
Behcet's Disease ◽  
Blood Flow Velocities ◽  
And Control ◽  
Flow Velocities

The purpose of this study was to evaluate the hemodynamic changes occurring in the ophthalmic vasculature of eyes with Behçet's disease in a controlled clinical trial. Both eyes of patients with retinal involvement due to Behçet's disease were consecutively evaluated and were established as having mild or severe retinal vasculitis according to the ophthalmoscopic and fundus fluorescein angiographic findings. One eye from each patient was randomly selected and 25 eyes with mild to moderate and 25 eyes with severe vasculitis were identified. Color Doppler imaging (CDI) was used to quantitate blood flow velocities and vascular resistance in the ophthalmic artery (OA), central retinal artery (CRA) and central retinal vein (CRV) of these patients and those of 25 healthy volunteers. All three groups were age- and sex-matched. In the OA, peak systolic, end diastolic and average flow velocities were significantly higher in patients with Behçet's disease than in the control group (p<0.05). CRA blood flow velocities of patients with severe retinal involvement were significantly lower than those with mild to moderate vasculitis and control groups and the average vascular resistance was significantly higher than in the control group (p<0.05). Additionally, the average blood flow velocities in the CRV of patients with severe vasculitis were significantly lower than in mild to moderate vasculitis and control patients. Marked circulatory changes were seen in the ophthalmic vasculature of eyes with Behçet's disease. Although larger studies are required to define the true sensitivity and specificity of this technique, these initial results suggest that CDI could play a major part in the assessment of patients with ocular Behçet's disease.

Patterns of Cerebral Blood Flow and Systemic Hemodynamics During Arithmetic Processing

2008 ◽  
Vol 22 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Natalie Werner ◽  
Neval Kapan ◽  
Gustavo A. Reyes del Paso
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Time Course ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Systemic Hemodynamics ◽  
Heart Period ◽  
Blood Flow Velocities ◽  
Flow Velocities

The present study explored modulations in cerebral blood flow and systemic hemodynamics during the execution of a mental calculation task in 41 healthy subjects. Time course and lateralization of blood flow velocities in the medial cerebral arteries of both hemispheres were assessed using functional transcranial Doppler sonography. Indices of systemic hemodynamics were obtained using continuous blood pressure recordings. Doppler sonography revealed a biphasic left dominant rise in cerebral blood flow velocities during task execution. Systemic blood pressure increased, whereas heart period, heart period variability, and baroreflex sensitivity declined. Blood pressure and heart period proved predictive of the magnitude of the cerebral blood flow response, particularly of its initial component. Various physiological mechanisms may be assumed to be involved in cardiovascular adjustment to cognitive demands. While specific contributions of the sympathetic and parasympathetic systems may account for the observed pattern of systemic hemodynamics, flow metabolism coupling, fast neurogenic vasodilation, and cerebral autoregulation may be involved in mediating cerebral blood flow modulations. Furthermore, during conditions of high cardiovascular reactivity, systemic hemodynamic changes exert a marked influence on cerebral blood perfusion.

scholarly journals Effect of positioning from supine and left lateral positions to left lateral tilt on maternal blood flow velocities and waveforms in full-term parturients

Anaesthesia ◽  
2012 ◽  
Vol 67 (8) ◽  
pp. 936-936 ◽  
Author(s):  
P. Kundra ◽  
J. Velraj ◽  
U. Amirthalingam ◽  
S. Habeebullah ◽  
K. Yuvaraj ◽  
...  
Keyword(s):  
Blood Flow ◽  
Maternal Blood ◽  
Full Term ◽  
Lateral Tilt ◽  
Blood Flow Velocities ◽  
Flow Velocities
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