scholarly journals Diagnostic accuracy of carotid doppler ultrasound for the detection of right-to-left cardiac shunt

2020 ◽  
Vol 30 (4) ◽  
pp. 201
Author(s):  
Anna Marenghi ◽  
Elisa Ceriani ◽  
ElisaMaria Fiorelli ◽  
Mattia Bonzi ◽  
Nicola Montano ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Doppler Ultrasound ◽  
Carotid Doppler ◽  
Cardiac Shunt

scholarly journals AB1086 POWER DOPPLER AND SPECTRAL DOPPLER ULTRASOUND IN SUSPECTED ACTIVE SACROILIITIS: A COMPARISON WITH MAGNETIC RESONANCE IMAGING AS GOLD STANDARD

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1832.1-1832
Author(s):  
P. Falsetti ◽  
E. Conticini ◽  
C. Baldi ◽  
M. Bardelli ◽  
S. Gentileschi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Diagnostic Accuracy ◽  
Doppler Ultrasound ◽  
Gold Standard ◽  
Clinical Characteristics ◽  
Power Doppler ◽  
Resonance Imaging ◽  
Asas Criteria ◽  
Spectral Doppler

Background:SIJ involvement is a characteristic feature of Spondylarthritis (SpA). Magnetic Resonance imaging (MRI) has been included in the new Assessment of SpA International Society (ASAS) criteria for the classification of Axial SpA. Gray scale US, Color Doppler ultrasound (CDUS), contrast-enhanced CDUS, and spectral Doppler (SD) US has been used in few works to evaluate the inflammatory activity of the SIJ with not conclusive results. Power Doppler ultrasound (PDUS) was not yet applied to the study of SIJ with active SI.Objectives:The aim of this work was to study with PDUS and SD US the SIJ of patients with suspected active SI, to describe inflammatory flows with spectral wave analysis (SWA) in duplex Doppler US, and to correlate US data with clinical characteristics and the presence of bone marrow edema (BME) in MRI.Methods:22 patients (18 females and 4 males, mean age 35 years) with new onset of inflammatory back pain (IBP), were included. Every patient underwent an US examination in prone position. The sonographers were blinded to the clinical data of the patient. A Esaote Twice US machine, equipped with a convex multifrequency 1-8 MHz probe, was used, with standardized parameters: 1-5 MHz for gray scale, 1.9-2.3 MHz frequency for Doppler with Pulse Repetition Frequency (PRF) of 1.0 KHz and a color gain just under the artifact limit. SIJ was located as the hypoechoic triangle delimited between the sacrum and iliac bone, and the posterior SI ligament as the upper margin. The first sacral foramen was always localized to avoid measurement of the normal pre-sacral arteries. The PDUS was applied, and if any signals were detected in the SIJ, they were scored with a 3-points scale: 0= absence of signals, 1= isolate vessels, 2= more than one vessel. The signals were also classified as intra-articular or peri-articular. The same vessels were also evaluated using quantitative SD calculating the Resistive Index (RI=peak of systolic flow- end diastolic flow/peak systolic flow), ranging between 0 and 1. Every patient underwent MRI of SIJ within the same week, before treatment. A statistical analysis was performed, estimating the sensitivity and specificity against the gold standard (presence of BME in the same SIJ according to ASAS criteria). The Spearman rank not-parametric test was applied to correlate the presence and grading of BME with PDUS grading and RI. A regression analysis was applied between PDUS results and clinical characteristics.Results:In 14/22 SIJ MRI revealed BME. In 13 of them, PDUS confirmed abnormal hypervascularisation in the intrarticular portion of SI, and in 3 in the periarticular site too. Two SIJ showed hypervascularisation at PD with no BME in MRI. A significant correlation was demonstrated between positivity and grading of PD and presence of BME in MRI (p=0.0005). SD analysis demonstrated low Resistance Index (RI) values in 14 SIJ (mean 0.57). An inverse correlation was demonstrated between RI and grading of BME in MRI (r= -0,6229, p= 0,044). The diagnostic accuracy of SD for detection of active SI varied on the basis of RI cut-off value. The best values of sensitivity (62,5%) and specificity (61,5%) were obtained with a RI cut-off values of 0.60. A multiple regression model demonstrated a significant relationship between PDUS signals and ASDAS (p=0.0382), but not with inflammatory reactants.Conclusion:PDUS and SD US of SIJ can be useful as first imaging assessment in suspected active SI, demonstrating a good diagnostic accuracy compared with MRI. Intra-articular low RI values (<0.60) on SD indicate active SI with good accuracy. Moreover, PDUS signals into the SIJ correlate with clinical symptoms but not with inflammation reactants.Figure 1.Doppler US in SI.Right SIJ with a Doppler signal along the posterior SIJ ligament, and another Doppler signal into the joint, where SD analysis gave a RI of 0,62.Disclosure of Interests:None declared

scholarly journals What Are the Current Indications for Carotid Doppler Ultrasound?

2016 ◽  
Vol 64 (5) ◽  
pp. 1532 ◽  
Author(s):  
Jean-Jacob Brassard ◽  
Stéphane Elkouri ◽  
Pierre Robillard
Keyword(s):  
Doppler Ultrasound ◽  
Carotid Doppler

scholarly journals Significance of obstetric Doppler studies in prediction of perinatal outcome in pregnancy induced hypertension

2017 ◽  
Vol 6 (6) ◽  
pp. 2354 ◽  
Author(s):  
Pradip R. Gaikwad ◽  
Manisha R. Gandhewar ◽  
Nity Rose ◽  
Vidyadhar Suryakar
Keyword(s):  
Diagnostic Accuracy ◽  
Doppler Ultrasound ◽  
Predictive Value ◽  
Perinatal Outcome ◽  
Uterine Artery ◽  
Pregnancy Induced Hypertension ◽  
Doppler Studies ◽  
Uterine Artery Doppler ◽  
Adverse Perinatal Outcome ◽  
Induced Hypertension

Background: Pregnancy induced hypertension (PIH) is associated with adverse perinatal outcome. Multi vessel color Doppler studies are useful in these cases for timely intervention. The aim of present study was to know the significance of umbilical, middle cerebral and uterine artery Doppler studies in PIH and to analyse its role in predicting perinatal outcome.Methods: This was a prospective study of 106 singleton pregnancies in the third trimester with PIH. The results of last Doppler ultrasound within one week of delivery were used for analysis. Adverse perinatal outcome was studied in the form of emergency cesarean section for fetal distress, meconium stained amniotic fluid, Apgar at 5 min <7, NICU admission and perinatal mortality (stillbirths and neonatal death). Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and diagnostic accuracy of various Doppler parameters were calculated after comparing with standard.Results: In the present study specificity and diagnostic accuracy of all Doppler ultrasound parameters was high in predicting adverse perinatal outcome. Cerebroplacental ratio showed highest specificity (98.55%), PPV (94.44%) and diagnostic accuracy (80.19%) in predicting adverse perinatal outcome and it is better than MCA PI and UA PI alone. Uterine artery Doppler evaluation also gives additional information in predicting adverse perinatal outcome.Conclusions: Amongst various Doppler parameters cerebroplacental index (MCA/UA PI) is best predictor of adverse perinatal outcome.

scholarly journals Extracranial carotid Doppler ultrasound evaluation of cerebral blood flow volume in COPD patients

2006 ◽  
Vol 100 (10) ◽  
pp. 1826-1833 ◽  
Author(s):  
Ramazan Albayrak ◽  
Fatma Fidan ◽  
Mehmet Unlu ◽  
Murat Sezer ◽  
Bumin Degirmenci ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Doppler Ultrasound ◽  
Flow Volume ◽  
Blood Flow Volume ◽  
Ultrasound Evaluation ◽  
Copd Patients ◽  
Carotid Doppler

scholarly journals Diagnostic Accuracy of Doppler Ultrasound Compared to Surgical Exploration in Torsion Testis

2021 ◽  
Vol 10 (35) ◽  
pp. 3035-3039
Author(s):  
Murali Thekeveetil ◽  
Sajitha Krishnadas ◽  
, JayaKoothupalakal Vishwambharan
Keyword(s):  
Positive Predictive Value ◽  
Diagnostic Accuracy ◽  
Doppler Ultrasound ◽  
Predictive Value ◽  
Testicular Torsion ◽  
Clinical Findings ◽  
Acute Scrotum ◽  
Care Hospital ◽  
Predictive Values ◽  
Doppler Evaluation

BACKGROUND Twisting of the spermatic cord resulting in ischemia of the testicles known as testicular torsion is a surgical emergency. Delay in diagnosis or surgery results in loss of testicles. Doppler ultrasound of scrotum is used in evaluating acute scrotum to support or rule out a diagnosis of torsion testis. Our study compares Doppler results with findings at exploration to finding out the accuracy of Doppler diagnosis in this scenario. METHODS This was a record based observational cross-sectional study. Out of all cases of acute scrotum presented to a tertiary care hospital over 14 months time, those patients with Doppler evaluation done were identified (n = 52) and their surgical findings were compared to the Doppler findings. Diagnostic accuracy of Doppler in diagnosing torsion testis was measured using sensitivity, specificity, accuracy, and predictive values. RESULTS Out of these 52 cases, 44 (84.6 %) were testicular torsion on exploration while remaining cases were epididymo-orchitis four (7.7 %) and testicular appendage torsion four (7.7 %). Among 44 cases of torsion testis, 31 (70.5 %) patients underwent orchiectomy (70.45 %) and in remaining 13 (29.5 %) orchiopexy was done. Sensitivity of Doppler to diagnose testicular torsion was 86.4 %, specificity was 87.5 % and accuracy was 86.54 %. Positive predictive value (PPV) was 97.4 % and negative predictive value (NPV) was 53.8 %. CONCLUSIONS Doppler ultrasound can be used as an adjunct to clinical findings in acute scrotum. High positive predictive value suggest that all Doppler diagnosed torsion should undergo emergency exploration as it will be correct in 97.5 % cases. If performing a Doppler study delays the definitive management, and if clinical findings are highly suggestive of testicular torsion, treating doctor can proceed to surgery without Doppler evaluation. KEY WORDS Doppler, Torsion Testis, Scrotum

scholarly journals Diagnostic accuracy of Doppler ultrasound, CT and MRI in Budd Chiari syndrome: systematic review and meta-analysis

2020 ◽  
Vol 93 (1109) ◽  
pp. 20190847 ◽  
Author(s):  
Pankaj Gupta ◽  
Varun Bansal ◽  
Praveen Kumar-M ◽  
Saroj K Sinha ◽  
Jayanta Samanta ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Doppler Ultrasound ◽  
Meta Analysis ◽  
Area Under The Curve ◽  
Diagnostic Odds Ratio ◽  
Budd Chiari Syndrome ◽  
Chiari Syndrome ◽  
Sensitivity Specificity ◽  
Ct And Mri

Objective: To evaluate the sensitivity, specificity, and diagnostic odds ratio (DOR) of Doppler ultrasound, CT, and MRI in the diagnosis of Budd Chiari syndrome (BCS). Methods: We performed a literature search in PubMed, Embase, and Scopus to identify articles reporting the diagnostic accuracy of Doppler ultrasound, CT, and MRI (either alone or in combination) for BCS using catheter venography or surgery as the reference standard. The quality of the included articles was assessed by using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. Results: 11 studies were found eligible for inclusion. Pooled sensitivities and specificities of Doppler ultrasound were 89% [95% confidence interval (CI), 81–94%, I2 = 24.7%] and 68% (95% CI, 3–99%, I2 = 95.2%), respectively. Regarding CT, the pooled sensitivities and specificities were 89% (95% CI, 77–95%, I2 = 78.6%) and 72% (95% CI, 21–96%, I2 = 91.4%), respectively. The pooled sensitivities and specificities of MRI were 93% (95% CI, 89–96%, I2 = 10.6%) and 55% (95% CI, 5–96%, I2 = 87.6%), respectively. The pooled DOR for Doppler ultrasound, CT, and MRI were 10.19 (95% CI: 1.5, 69.2), 14.57 (95% CI: 1.13, 187.37), and 20.42 (95% CI: 1.78, 234.65), respectively. The higher DOR of MRI than that of Doppler ultrasound and CT shows the better discriminatory power. The area under the curve for MRI was 90.8% compared with 88.4% for CT and 86.6% for Doppler ultrasound. Conclusion: Doppler ultrasound, CT and MRI had high overall diagnostic accuracy for diagnosis of BCS, but substantial heterogeneity was found. Prospective studies are needed to investigate diagnostic performance of these imaging modalities. Advances in knowledge: MRI and CT have the highest meta-analytic sensitivity and specificity, respectively for the diagnosis of BCS. Also, MRI has the highest area under curve for the diagnosis of BCS.

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