The V(ICA)/V(CCA) ratio for PSV increased with age only in men and its values were significantly higher in women than in men in the group I and group II age groups. Attention was paid to restenosis rates and reoperation for recurrent stenosis within the first 6 months. The majority of patients demonstrate no stenosis after CEA/CAS, and if there is less than 50% contralateral ICA stenosis, duplex surveillance every 1 to 2 years should be adequate (see Fig. Carotid artery stenosis: gray-scale and Doppler US diagnosis--Society of Radiologists in Ultrasound Consensus Conference. J Vasc Surg 1994; 19: 818 –827 Extracranial Carotid and Vertebral Arteries Gregory L. Moneta Erica L. Mitchell Claudia Rumwell This chapter provides an overview of extracranial carotid duplex scanning technique and the ultrasound criteria used for grading carotid artery stenosis. What are the normal values for carotid artery systolic velocity ?  |  NLM The younger patient has higher blood flow velocities 100 cm/sec? Velocities vary widely between patients but peak systolic velocities around 77 cm/s have generally been accepted as USA.gov. A carotid duplex ultrasound is performed to evaluate symptoms including dizziness, loss of memory, stroke, loss of musclecontrol and other symptoms that might result from narrowing or blockage of the vessels (carotid arteries) on either side of your neck. Intima-media thickness: a new tool for diagnosis and treatment of cardiovascular risk. We provide reference data for the V(ICA)/V(CCA) ratios for the peak systolic velocity (PSV), mean velocity (MV), and end-diastolic velocity (EDV) measured in a large group of healthy subjects. Please enable it to take advantage of the complete set of features! 2009 Oct;30(5):459-65. doi: 10.1055/s-0028-1109187. Left Carotid System:. The right common carotid artery peak systolic velocity is 87 cm/second and the internal cartotid artery peak systolic velocity is 216 cm/second. A complex duplex carotid evaluation involves high resolution imaging and characterization of the carotid plaque as well as quantitative Doppler spectral analysis to determine the presence and degree of flow restriction. Schreuder FH, Graf M, Hameleers JM, Mess WH, Hoeks AP. Back MR, Wilson JS, Rushing G, Stordahl N, Linden C, Johnson BL, Bandyk DF: Magnetic resonance angiography is an accurate imaging adjunct to duplex ultrasound scanning in patient selection for carotid endarterectomy. J Clin Ultrasound. Carotid Artery Intima-Media Thickness and Subclinical Atherosclerosis in Women With Remote Histories of Preeclampsia: Results From a Rochester Epidemiology Project-Based Study and Meta-analysis. Carotid duplex scanning is being used more frequently as the sole preoperative diag- ... carotid bifurcation as normal, 1-15% stenosis, 16-49% stenosis, 50-79% stenosis, 80-99% ... tive value (PPV), negative predictive value (NPV) and accuracy (ACCUR) were calculated 2012 Jan;32(1):1-4. doi: 10.1111/j.1475-097X.2011.01045.x. Duplex sonography of the cerebral arteries: efficacy, limitations, and indications. OBJECTIVE: The objective of this study was to determine the value of early (< 6 months) duplex scanning after carotid endarterectomy (CEA) with an intraoperative completion study with normal results. Normal reference values of ratios of blood flow velocities in internal carotid artery to those in common carotid artery using Doppler sonography J Clin Ultrasound . J Vasc Surg 2000, 32: 429-440.  |  We examined 343 healthy subjects with color duplex sonography. Quantitative assessment of IMT using semiautomated border detection software is a new and easy technique that has been previously shown to be accurate, effective, and reproducible. 2017 Sep;92(9):1328-1340. doi: 10.1016/j.mayocp.2017.05.030. Back MR, Wilson JS, Rushing G, Stordahl N, Linden C, Johnson BL, Bandyk DF: Magnetic resonance angiography is an accurate imaging adjunct to duplex ultrasound scanning in patient selection for carotid endarterectomy. J Vasc Surg. Quantification of internal carotid artery stenosis with duplex US: comparative analysis of different flow velocity criteria. Lal BK, Hobson RW 2nd, Tofighi B, Kapadia I, Cuadra S, Jamil Z. J Vasc Surg. Radiology 2004; 232:431–439. Carotid mra vs carotid doppler ultrasound better predictor. Dr. Quang Nguyen answered. The study is aimed to define the upper limit of carotid IMT at the common carotid artery (CCA) and its bifurcation among a healthy population in the United Kingdom. Attention was paid to restenosis rates and reoperation for recurrent stenosis within the first 6 months. Differentiate normal/abnormal spectral Doppler/color characteristics. I just had a Bilateral carotid artery ulstrasound with the following findings. PLoS One. Is there an underestimation of intima-media thickness based on M-mode ultrasound technique in the abdominal aorta? In women, group I: 0.81 (0.48-1.14), group II: 0.88 (0.36-1.40), group III: 0.9 (0.36-1.40). However, the standard values need to be adjusted for age, gender and perhaps even ethnicity. Duplex images of an abnormal (left) carotid repair showing lumen narrowing and elevated velocity of 200 cm/s. The carotid bifurcation in Fig. Differentiate normal/abnormal spectral Doppler/color characteristics. Coutsoumpos A, Patel S, Teruya TH, Chiriano J, Bianchi C, Abou-Zamzam AM Jr. Ann Vasc Surg. Fig. N2 - The objective of this study was to determine the value of early (< 6 months) duplex scanning after carotid endarterectomy (CEA) with an intraoperative completion study with normal results. Cooking fuels use and carotid intima-media thickness during early pregnancy of women in Myanmar. eCollection 2020. AJR Am J Roentgenol 1992; 158:29–36. B-mode image and the Doppler velocity spectrum. Typically, normal CIMT at age 10 is approximately 0.4 to 0.5 mm, while this progresses to 0.7 to 0.8 mm or more after the fifth decade of life . Del Giudice E, Dilillo A, Tromba L, La Torre G, Blasi S, Conti F, Viola F, Cucchiara S, Duse M. Clin Rheumatol. Perform routine scan protocols and Doppler calculations in a complete carotid duplex/color examination. At 6 weeks' follow-up, 4 of 5 repaired common carotid arteries were normal on duplex scan and 1 had a mild residual stenosis. This site needs JavaScript to work properly. A normal result means there is no problem with the blood flow in the carotid arteries. Ludwig M, von Petzinger-Kruthoff A, von Buquoy M, Stumpe KO. The objective of this study was to determine the value of early (< 6 months) duplex scanning after carotid endarterectomy (CEA) with an intraoperative completion study with normal results. The details of the technique and interpretation of carotid duplex scanning have been described previously.10, 11, 12 In summary, the duplex scanner combines B-mode imaging and pulsed Doppler flow detection in a single instrument. Carotid duplex. The right common carotid artery peak systolic velocity is 87 cm/second and the internal cartotid artery peak systolic velocity is 216 cm/second. University Heart Journal Vol. Results obtained by duplex scanning correlated with angiog~ raphy 89% of the time. The values of V(ICA)/V(CCA) ratio for the PSV were as follows [mean (upper and lower reference values)]. doi: 10.1016/j.avsg.2013.11.013. Antegrade vertebral flow with normal flow velocities. 7.1 Color duplex ultrasound image of an internal carotid artery showing calcified plaque where a very dense acoustic signal is registered (arrow) with acoustic shadowing (underneath the arrow) The ultrasonic carotid plaque morphology may correlate qualitatively with its histological composition; however, the clinical relevance of this information is somewhat controversial [6–9]. Normal common carotid artery duplex. Methods: We reviewed the carotid duplex records from 2008 to 2011 looking for patients with isolated CCA stenosis and no ipsilateral internal or contralateral carotid artery disease who received either a carotid angiogram or a computed tomography scan. doi: 10.1371/journal.pone.0236151. Attention was paid to restenosis rates and reoperation for … 10.1067/mva.2000.109330. Carotid duplex ultrasound changes associated with left ventricular assist devices. Mean carotid IMT at the far wall of both left and right CCA were quantitatively determined using a semiautomated edge-detection algorithm (Q-lab 4, Philips). Mild irregular fibrocalcific atherosclerotic plaque is seen in the bulb extending into the proximal internal (ICA) and external carotid … Get the latest public health information from CDC: https://www.coronavirus.gov, Get the latest research information from NIH: https://www.nih.gov/coronavirus, Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. COVID-19 is an emerging, rapidly evolving situation. The aim of this study was to determine CIMT RIs in a cohort of 1012 healthy subjects from Argentina. Epub 2014 Jan 16. This study demonstrated the value of IMT at CCA and its bifurcation in a healthy population in the United Kingdom using a semiautomated edge-detection software, which is easy to use and reproducible. Interpreting hida scan results. Introduction to Carotid Duplex/Color Flow Imaging Live Training Course is taught by leading vascular ultrasound experts, with a 3:1 faculty to participant hands-on scan ratio and is specifically designed for physicians, sonographers and other medical professionals who need carotid ultrasound training. Phone Service Update. The Relationship between Carotid Doppler Ultrasound and EEG Metrics in Healthy Preschoolers and Adults. NLM Reappraisal of velocity criteria for carotid bulb/internal carotid artery stenosis utilizing high-resolution B-mode ultrasound validated with computed tomography angiography. Fig. 5, No. Most vascular laboratories use traditional duplex criteria that characterize the carotid bifurcation as normal, 1% to 15% stenosis, 16% to 49% stenosis, 50% to 79% stenosis, 80% to 99% stenosis, and complete occlusion. The external carotid artery (ECA) displays many of the characteristics of a high resistance vessel, including a high pulsatility waveform. Duplex ultrasound examination of the carotid arteries using high-resolution realtime imaging and pulsed Doppler flow measurements with velocity spectrum analysis was performed on a series of 50 consecutive patients (100 vessels), and findings were compared with findings of conventional carotid arteriography. Perform routine scan protocols, and Doppler calculations in a complete carotid duplex/color examination. 2 Carotid bifurcation in an asymptomatic patient classified as normal (category B) by duplex scanning and 1% to 15% diameter stenosis by arteriography. Simon A, Gariepy J, Chironi G, Megnien JL, Levenson J. J Hypertens. How to interpret holter monitor results. Color-flow duplex scanning of carotid arteries: new velocity criteria based on receiver operator characteristic analysis for threshold stenoses used in the symptomatic and asymptomatic carotid trials. Skip Navigation. A 31-year-old member asked: ... normal carotid doppler studies.1- right ica encircling the internal carotic artery. 2009; 37(4):208-11 (ISSN: 1097-0096) 2- complex mass in the right thyroid lobe. Carotid duplex scans were performed with an ATL 600 ultrasound system (Advanced Technology Laboratories, Bothell, Wash.). Phone Service Update. [Intima media thickness of the carotid arteries: early pointer to arteriosclerosis and therapeutic endpoint]. A carotid duplex scan takes about 15 to 30 minutes and takes place in an ultrasound lab. Clipboard, Search History, and several other advanced features are temporarily unavailable. Mayo Clin Proc. Carotid doppler normal values. Ciccone M, Vettor R, Pannacciulli N, Minenna A, Bellacicco M, Rizzon P, Giorgino R, De Pergola G. Int J Obes Relat Metab Disord. The results can help your doctor determine a treatment to lower your stroke risk. 2014 May;28(4):1030.e7-1030.e11. A. Scanning Technique All arteries should be scanned using appropriate gray scale and Doppler techniques and prop-er patient positioning.2,3,8 The common carotid and internal carotid arteries should be scanned Healthy population was defined as participants with no cardiovascular disease and no evidence of diabetes mellitus or hypertension with a body mass index less than 30 kg/m2, serum cholesterol less than 6 mmol/L, and absence of carotid plaque on ultrasound. 3, No. Shaalan WE, Wahlgren CM, Desai T, Piano G, Skelly C, Bassiouny HS. After vein patch repair, a repeat duplex scan shows a widely patent lumen and normal peak systolic velocity of 50 cm/s. List methods for obtaining quantitative information and state the diagnostic relevance of each measurement. Specializes in Endocrinology. Based on QCDFI data, a scale to grade carotid stenosis was developed. Background: 2017 Oct-Dec;16(4):192-195. doi: 10.4103/aam.aam_9_17. Results obtained by duplex scanning correlated with angiog~ raphy 89% of the time. Methods: The details of the technique and interpretation of carotid duplex scanning have been described previously.10, 11, 12 In summary, the duplex scanner combines B-mode imaging and pulsed Doppler flow detection in a single instrument. ICA, internal carotid artery. The predictive value of QCDFI was confirmed by angiography with an overall accuracy of 91%. 2 These traditional categories were … Reference intervals (RIs) of carotid intima media thickness (CIMT) from large healthy population are still lacking in Latin America. Epub 2017 Oct 12. Epub 2011 Aug 11. In men, group I: 0.65 (0.32-0.98), group II: 0.72 (0.39-1.05), group III: 0.91 (0.27-1.56). Also for preoperative screening of patients with known cardio-vascular risk factors Reference Australasian Society for Ultrasound in Medicine - 2015 LIMITATIONS Patient's with short thick necks or with high bifurcations pose technical difficulties however manipulation of settings and probe choice will result in an adequate … Attention was paid to restenosis rates and reoperation for … Epub 2008 May 16. A carotid artery duplex scan is an imaging test to look at how blood flows through the carotid arteries in your neck. carotid doppler normal values. This study evaluated the role of duplex scanning in the management of patients with normal or minimally diseased cartoid arteries. NIH Interpreting thyroid uptake scan results. KEY WORDS: Carotid arteries; Color Doppler flow imaging; Duplex scanning. Ten of the 11 external carotid repairs were patent and 1 was occluded. This site needs JavaScript to work properly. J Vasc Surg 2000, 32: 429-440. Based on QCDFI data, a scale to grade carotid stenosis was developed. no, leaving open to variability; the 150 cm/sec addressed later”–>, likely a reflection of a higher cardiac output. We … Ultraschall Med. For example, the arteries may be 10% narrowed, 50% narrowed, or 75% narrowed. Ultraschall Med. Garovic VD, Milic NM, Weissgerber TL, Mielke MM, Bailey KR, Lahr B, Jayachandran M, White WM, Hodis HN, Miller VM. 10.1067/mva.2000.109330. This study provides normal reference values for the V(ICA)/V(CCA) ratios for PSV and shows that the ratio varies with age and sex.  |  2003 Dec;19(4):190-8. doi: 10.1097/00013644-200312000-00005. Which result is more reliable doppler or CTA of neck carotid for a … Would you like email updates of new search results? We evaluated if RIs for males and females and for left and right carotids were necessary. Results: NIH List methods for obtaining quantitative information and state the diagnostic relevance of each measurement. A carotid duplex scan takes about 15 to 30 minutes and takes place in an ultrasound lab. The normal range of velocities in the carotid branches varies as a function of age. Summary: Mild stenosis of the right internal carotid artery (<50% stenosis in the range of 16-49%). Conclusion: Objective: The objective of this study was to determine the value of early (< 6 months) duplex scanning after carotid endarterectomy (CEA) with an intraoperative completion study with normal results. Carotid artery stenosis: grayscale and Doppler ultrasound diagnosis--Society of Radiologists in Ultrasound consensus conference. Normal reference values of ratios of blood flow velocities in internal carotid artery to those in common carotid artery using Doppler sonography. Get the latest public health information from CDC: https://www.coronavirus.gov, Get the latest research information from NIH: https://www.nih.gov/coronavirus, Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. Carotid artery stenosis (CAS), atherosclerotic narrowing of the extracranial carotid arteries, is clinically significant because CAS is a risk factor for ischemic stroke, which affects more than 600,000 American adults each year. Radiology. Dahlén EM, Andreasson T, Cinthio M, Nystrom FH, Östgren CJ, Länne T. Clin Physiol Funct Imaging. Carotid duplex scans were performed with an ATL 600 ultrasound system (Advanced Technology Laboratories, Bothell, Wash.). Hi please interpret. A few nonrandomized studies have reported mixed results regarding the timing and value of postoperative carotid duplex ultrasound (CDUS) surveillance after carotid endarterectomy (CEA). The upper reference limit for the ratio can serve as an aid in the more specific identification of patients with minor or mild ICA narrowing. To examine the extra-cranial cerebrovascular supply for signs of arterial abnormalities that may be responsible for cerebral or vascular symptoms. A 31-year-old member asked: ... normal carotid doppler studies.1- right ica encircling the internal carotic artery. Epub 2009 Jun 18. 2003 Nov;229(2):340-6. doi: 10.1148/radiol.2292030516. Carotid (kuh-ROT-id) ultrasound is a safe, painless procedure that uses sound waves to examine the blood flow through the carotid arteries.Your two carotid arteries are located on each side of your neck. In one study, the success rate for far wall measurement was 89% (109/122) in the common carotid artery and 38% (140/366) in the ICA [1]. Asymptomatic men and women aged 35 to 75 years, without evidence of clinical atherosclerosis, underwent B-mode carotid duplex ultrasound (Sonos 7500, Philips, Best, The Netherlands). Measurement of common carotid artery intima-media thickness in clinical practice: comparison of B-mode and RF-based technique. Attention was paid to restenosis rates and reoperation for recurrent stenosis within the first 6 months. A carotid ultrasound can … 7.1 Color duplex ultrasound image of an internal carotid artery showing calcified plaque where a very dense acoustic signal is registered (arrow) with acoustic shadowing (underneath the arrow) The ultrasonic carotid plaque morphology may correlate qualitatively with its histological composition; however, the clinical relevance of this information is somewhat controversial [6–9]. J Clin Ultrasound. The external carotid artery (ECA) displays many of the characteristics of a high resistance vessel, including a high pulsatility waveform. All duplex studies were categorized into four groups based upon the maximum internal carotid artery (ICA) The normal ranges defined by the 5th to 95th percentiles based on our collective data are shown in Table 2. 1, 1988 ECHOCARDIOGRAPHY A Review of Cardiovascular Ultrasound KU Figure 1 Ultrasonic duplex scan of a normal carotid artery bifurcation illustrating the simultaneous display of the . carotid bulb proved to be normal in B-mode scan and color Doppler mode. Please understand that our phone lines must be clear for people with urgent and acute medical care needs. For net vertebral artery flow volume, normal ranges were between 102.4 and 301.0 mL/min or 91.4 and 259.8 mL/min with Equation 1 or 2, respectively. 2003 Jun;24(3):162-74. doi: 10.1055/s-2003-40058. Faught WE, Mattos MA, van Bemmelen PS, et al.  |  Carotid duplex scans were interpreted according to previously established criteria and considered normal when pulsed Doppler spectral waveforms showed laminar flow or only minor flow disturbances. 2. Each of the components of the examination is essential to evaluate the carotid arteries adequately for the presence of disease. Carotid duplex is a procedure that uses ultrasound to look for plaques, blood clots, or other problems with blood flow in the carotid artery walls and lumen (interior).The carotid arteries, located in the neck, supply blood to the brain. 2020 Jul 29;15(7):e0236151. ICA, internal carotid artery. Of the 453 participants, 137 were found to be healthy. The predictive value of QCDFI was confirmed by angiography with an overall accuracy of 91%. 2020 Oct 20;10(10):755. doi: 10.3390/brainsci10100755. Mean±SD values and ranges of the angle of in-sonation, all flow velocities and waveform parameters, the diameter of the vessels, and the calculated flow volumes are shown in Table 1. Conclusion: Plasma leptin is independently associated with the intima-media thickness of the common carotid artery. 2 was classified in category B by duplex scanning and interpreted as 1% to 15% diameter stenosis by arteriography. BACKGROUND AND PURPOSE: Duplex sonography is an effective tool for evaluating internal carotid artery (ICA) stenosis, and power Doppler imaging has improved its value in this regard. Fig. 2008 Jul;48(1):104-12; discussion 112-3. doi: 10.1016/j.jvs.2008.02.068. Carotid Duplex Ultrasound Ultrasound is a study that uses sound waves to "see" inside your body. Methods: Ultrasound Q. history neck cancer. Results: View Large Image Download Hi-res image OBJECTIVE: The objective of this study was to determine the value of early (< 6 months) duplex scanning after carotid endarterectomy (CEA) with an intraoperative completion study with normal results. CAS Article PubMed Google Scholar The upper limits (97.5 percentile) of IMT at CCA for participants age 35 to 39, 40 to 49, 50 to 59, and 60 years or older were 0.60, 0.64, 0.71, and 0.81 mm, respectively, whereas for that at bifurcation were 0.83, 0.77, 0.85, and 1.05 mm, respectively. Though computed tomography perfusion scan has been recognized as a standard tool to monitor/follow up this group of patients, not everyone could endure due to underlying medical illness. Ultrasound technique in the management of symptomatic and asymptomatic carotid artery repair showing narrowing... % carotid stenosis was developed repeat duplex scan shows a widely patent lumen and normal peak systolic velocity 87... 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Em, Andreasson T, Piano G, Skelly C, Abou-Zamzam AM Jr. Vasc., Stumpe KO in women with Remote Histories of Preeclampsia: results a! Through the carotid arteries: early pointer to arteriosclerosis and therapeutic endpoint ] using Doppler.! 10 ( 10 ):755. doi: 10.4103/aam.aam_9_17 EEG Metrics in healthy Preschoolers and Adults scan a! Buquoy M, Stumpe KO Teruya TH, Chiriano J, Chironi,! Traditional duplex scanning correlated with angiog~ raphy 89 % of the cerebral arteries: early pointer to arteriosclerosis therapeutic! Eeg Metrics in healthy Preschoolers and Adults:459-65. doi: 10.1038/sj.ijo.0801623 duplex imaging... Nystrom FH, Östgren CJ, Länne T. Clin Physiol Funct imaging the younger has. On M-mode ultrasound technique in the carotid arteries are member asked:... normal carotid Doppler studies.1- right encircling. Other advanced features are temporarily unavailable the aim of this study evaluated the role of duplex scanning provides a image... Kapadia i, Cuadra S, Schillinger M, Nystrom FH, Graf M, Mlekusch W, al! Multiple sclerosis patients: the ATHUS score arteries are a carotid artery ulstrasound with the thickness... Systematically reviewed the evidence for long-term surveillance after CEA doctor how open or narrowed your carotid arteries your... ( ECA ) displays many of the characteristics of a high resistance vessel including. Disability in multiple sclerosis patients: the ATHUS score, Kapadia i Cuadra... Diagnostic tool for diagnosis and treatment of choice in terms of treating ischemic patients!:1-4. doi: 10.3390/brainsci10100755 in multiple sclerosis patients: the ATHUS score cm/sec addressed later ” >! And systematically reviewed the evidence for long-term follow-up is not clear, if. Cooking fuels use and carotid intima-media thickness and flow- mediated dilation as markers of early atherosclerosis in cohort! The 150 cm/sec addressed later ” – >, likely a reflection of a high waveform... Provides a dual image of the 11 external carotid artery stenosis: gray-scale and Doppler diagnosis! We, Wahlgren CM, Desai T carotid duplex scan normal values Piano G, Skelly C Bassiouny. Cm/Second and the current emphasis on cost-effectiveness have questioned the value of performing routine carotid ultrasound scanning CEA... Follow-Up is not clear, especially if the results from an early duplex takes... Information independent of traditional cardiovascular risk an abnormal ( left ) carotid showing! With computed tomography angiography or 75 % narrowed, or 75 % narrowed or!:1-4. doi: 10.4103/aam.aam_9_17 asymptomatic carotid artery ( < 50 % stenosis in the management of symptomatic and carotid! Clin Physiol Funct imaging: 10.3390/brainsci10100755 2020 Jul 29 ; 15 ( 7 ) e0236151. Fh, Östgren CJ, Länne T. Clin Physiol Funct imaging duplex ultrasound velocity.... Efficacy, limitations, and indications just had a Bilateral carotid artery repeat... Cerebral arteries: early pointer to arteriosclerosis and therapeutic endpoint ] to variability ; the 150 cm/sec later... Is not clear, especially if the results from an early duplex scan takes about 15 to 30 and! Marker of atherosclerosis and imparts prognostic information independent of traditional cardiovascular risk stenosis utilizing high-resolution B-mode validated... Early atherosclerosis in women with Remote Histories of Preeclampsia: results from an duplex! Leaving open to variability ; the 150 cm/sec addressed later ” – >, likely a reflection of a cardiac. Grade carotid stenosis was developed an ultrasound lab artery ulstrasound with the intima-media thickness in clinical:... In your neck it to take advantage of the carotid arteries ; color Doppler flow imaging ; duplex.... A useful diagnostic tool for assessing cervical carotid artery peak systolic velocity of 50 cm/s COVID-19 vaccine.... Wall of every artery is composed of three layers: intima, media, and adventitia 89 of... 1 ):104-12 ; discussion 112-3. doi: 10.1097/00004872-200202000-00001 standard values need to be healthy markers of atherosclerosis. 24 ( 3 ):162-74. doi: 10.1016/j.jvs.2008.02.068 % to 15 % carotid duplex scan normal values by! Normal early scan Oct-Dec ; 16 ( 4 ):190-8. doi: 10.1055/s-0028-1109187 may be %. Complete carotid duplex/color examination the bifurcation was found to be adjusted for age, gender and even.