vascular ultrasound protocols

Additionally, applicant facilities are notified via e-mail when revisions to the Standards & Guidelines are available for public comment. Elbow worksheet. With an understanding of the lower extremity venous anatomy, pathophysiologic features of venous insufficiency, and varicose vein treatment options, those who perform and interpret venous insufficiency studies are better prepared to help patients receive appropriate treatment. Guidelines on lower extremity peripheral artery disease (PAD) were published in theJournal of the American College of Cardiologyin 2016. fax: 301-459-5651, 2023 Society for Vascular Ultrasound Privacy Policy Accessibility Statement. Get a thorough review of ultrasound vascular diagnosis, including peripheral veins and arteries, carotid and vertebral arteries, abdominal vessels, and transcranial Doppler. SVS guideline writing groups draw upon systematic reviews of the available evidence to informkey recommendations. Patient position is an important factor to remember. I have a good understanding of the basic knowledge as beginner in Vascular Ultrasound. Sat/Sun: 8 a.m. 6 p.m. Emergency bedside ultrasonography enables the physician to confirm a high-risk diagnosis, decreasing the time . Venous reflux (Valvular incompetence) was then demonstrated in the CFV, the femoral vein, andposterior tibial veins along with an incompetent perforator vein in the right leg.Measure the wall diameter (varicose >3mm) of the incompetent perforator vein. |, Duplex Doppler Ultrasound Extracranial Carotid Artery Disease, New Data Privacy Law for Ultrasound Professional. visceral vascular duplex ultrasound - 100 cases 1.1.1.3A Informal Training - The informal training pathway allows for qualification of interpreting physicians through a combination of Continuing Medical Education (CME) and supervised practical and supervised interpretive experience. The Great Saphenous Vein (GSV) is evaluated next for incompetence.This patient demonstrated severe venous reflux in the GSV from the groin to ankle. Quickly reference numerous tables for examination protocols, normal values, diagnostic parameters, and ultrasound findings for selected conditions. Come post in our Open Forum. The SVU Vascular Technology Professional Performance Guidelines represent the minimal essential elements of performance as recommended by SVU. Society for Vascular Surgery clinical practice guidelines evaluate the evidence in the scientific literature, assess the likely benefits and harms of a particular treatment, and enable healthcare providers to select the best care for a unique patient based on his or her preferences. 2023 TRA Medical Imaging. Got a clinical question, want to crowdsource ideas, or just chat with other vascular professionals like yourself? NOTE: The SVU Board of Directors has approved several updates for the Professional Performance Guidelines (PPGs) in 2019. All Rights Reserved.Website Design & Development by Sitecrafting. SVS/AVF/AVLS clinical practice guideline for the management of varicose veins of the lower extremities was published byJVS-VLin October 2022. Ultrasound - Mesenteric Artery Protocol PURPOSE: To determine t he absence or presence of stenosis or aneurysm of the visceral arteries. U{x $mS?[G-Ej/Ia8powIz{. joF8m`Tt{\ >~a{&~CoW?o~g.oPB+zU-![qS5uq};FC''ffuzs{nbwj@j >BG)NH8!.S q$=^hB~r;[?&cW>} 2023 Nominations for SVU Service and Scientific Awards is Now Open! Clinical practice guidelines on compression therapy after invasive treatment of superficial veins of the lower extremities were published byJVS-VLin January 2019. SIDE NOTE:You can elicit retrograde flow in the incompentent vein by distal augmentation and/or asking thepatient to perform the valsalva technique (this works best from the going to mid to distal thighonly). Preform a venous duplex exam protocol, while evaluating for reflux. The methodology used for SVS clinical practice guidelineshas been published in theJournal of Vascular Surgery. Practice and accreditation standards & guidelines thatour members will find useful. An interventional cardiologist inserts a catheter with an ultrasound probe into a blood vessel in the groin or wrist. Change), You are commenting using your Twitter account. All rights reserved. Systematic review of surveillance after endovascular aortic repair, Request the guidelines in Spanish / Espaol. Upper Extremity Arterial Protocol. The best way to get your name out there is to get published. For additional help,click here. With the possible exception of pericardial tamponade, there is no other condition in which the rapid diagnostic capabilities of bedside sonography are of such striking benefit as abdominal aortic aneurysm (AAA). We also use third-party cookies that help us analyze and understand how you use this website. Upper Extremity Arterial Segmental Physiologic Evaluation (Arterial, TOS, Cold) (Updated 2019), 9. Vascular ultrasound uses sound waves to evaluate the body's circulatory system and help identify blockages in the arteries and veins and detect blood clots. The Journal for Vascular Ultrasound is the only scientific journal focused on vascular ultrasound. Suite 260 Vascular studies use high-frequency sound waves (ultrasound) to measure the amount of blood flow in your blood vessels. Applicant facilities must reference thecurrent published version of the Standards below when applying for first-time accreditation or reaccreditation. The scan can help diagnose obstructions in . Body US_Assessment of Developmental Hip Dysplasia. Introduction to Carotid & Peripheral Vascular Duplex/Color Flow Imaging - (7/18/2023 - 7/21/2023) Faculty: Phil Bendick PhD, RVT, FSDMS, FSVU Lori Green BA, RDMS, RDCS, RVT Trisha Reo Program Coordinator Our purpose now is to identify and evaluate the presence of reflux in the deep and superficialvenous system (including the perforators). Early Thrombus Removal Strategies for Acute Deep Venous Thrombosis (2012), Update: management of extracranial carotid disease (2011), The care of patients with varicose veins and associated chronic venous diseases (2011), Endovascular repair of traumatic thoracic aortic injury (2011), Management of the left subclavian artery with thoracic endovascular aortic repair (2009), Surgical placement and maintenance of arteriovenous hemodialysis access (2008), Management of atherosclerotic carotid artery disease (2008). Learn about our mobile apps to guide the treatment of and management of CLTI(VQI CLTI Mortality Prediction Model, SVS Threatened Limb Classification [WIfI], and Global Limb Anatomic Staging System [GLASS]). Complete gray scale documentation in longitudinal, At least three gray scale images of the left lobe to include lateral, mid, medial, At least three gray scale images of the right lobe to include lateral, mid, medial, Complete gray scale documentation in transverse, At least three gray scale images of the left lobe to include superior, mid, inferior, At least three gray scale images of the right lobe to include superior, mid, inferior, Article created; FAQs incorporated; No criteria changes, Clinical Image Testing: Ultrasound (Revised 2-1-2023), Exam Requirements: Obstetrical Ultrasound (Revised 11-10-2022), Exam Requirements: Gynecological Ultrasound (Revised 1-21-2022), Exam Requirements: General Ultrasound (Revised 11-9-2022), Exam Requirements: Pediatric Ultrasound (Revised 11-9-2022). Yes The Vascular module includes the following submodules: Peripheral Arterial Peripheral Venous Cerebrovascular Liver Vasculature Renal Vasculature Aorta Sites must apply for allsubmodules performed. These cookies will be stored in your browser only with your consent. Extracranial Cerebrovascular Duplex Ultrasound Evaluation (Updated 2019) Intracranial 2. If only one submodule is performed, two examinations are required for that submodule. . The SDMS is the largest association of sonographers and sonography students in the world. I am requesting to add more vascular Art/ Vein anatomy and protocol such as, lower extremities, abdominal, and cranial. Preform a venous duplex exam protocol, while evaluating for reflux. Systematic Review of Duplex Ultrasound Surveillance. 1% 5O TcII9PAQc8qpHkH!EM!k)$)5R-dD0S1%K\BA"b+hLT]"6\jKQiPZKF5 Upper Extremity Venous Duplex Evaluation (Updated 2019), 10. Learn More ULearn After purchasing CME tests, you can view the associated content and take the test here. The protocols in use for venous ultrasound vary by promulgating organization and facilities in the same community. Carotid ultrasound: Carotid (kuh-ROT-id) ultrasound is a safe, painless procedure that uses sound waves to examine the blood flow through the carotid arteries. Systematic review for screening asymptomatic patients for PAD, Systematic review of treatment of intermittent claudication in the lower extremities. Doppler allows our specialists to evaluate the blood flow through the arteries and veins of your abdomen. Hand/finger worksheet (pending) Wrist worksheet. Ultrasound including: Abdominal/General Breast Female Pelvic Floor (Urogynecology) Fetal Echocardiography Gynecologic (with or without 3D) Musculoskeletal (Diagnostic) Musculoskeletal (Ultrasound-Guided Interventional Procedures) Standard Obstetric (all trimesters or trimester-specific) Upper . We also have educational resources for the sonography community. Vascular Testing Accreditation Standards & Guidelines The IAC Standards & Guidelines for Vascular Testing Accreditation are the minimum requirements for facilities to acquire or maintain accreditation. University of Washington University of Washington Duplex may also . Venous insufficiency is caused by the backwards flow of blood in the veins returning downwardtowards the lower extremities causing an increased intravascular pressure in the veins knownas venous hypertension. It is mandatory to procure user consent prior to running these cookies on your website. From my experience there are differences in the approach of . As with other US examinations, advantages include its noninvasive nature, relatively low-costs, and generally well-tolerated. The lower extremity bypass graft is also ideally placed for the successful application of Doppler ultrasound imaging. You'll be led in this Class along a path that will help you competently perform- and intuitively understand- Positive for reflux if >0.5 secondreverse flow with spectral Doppler. tel: 301-459-7550 View Hours by Department, function googleTranslateElementInit() { In June 2019,JVSpublished a supplement onchronic limb-threatening ischemia, including clinical practice guidelines, supporting systematic reviews and an editorial. Simply can't reach the ultrasound system and perform the study The patient gets tired Valsalva maneuvers can cause patients to get light-headed or nauseated References Englund, R. (1996). The Society develops guidelines to aid its members and their patients in the decision-making process. If you have an existing IAC Online Accreditation Account, please enter your Application or Account number for reference. The diagnostic techniques that identify venous obstruction are different from those required to identify valvular incompetence. Main Phone 402-484-6677. All Rights Reserved. plethysmographic . OB First Trimester Ultrasound Protocol. Vascular surgeons rely upon specific, often esoteric, ultrasound services to effectively diagnose and monitor patients. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. View Map, M-F: 6:30 a.m. 8:30 p.m. Tel: +1 214.473.8057 or 1.800.229.9506 Lanham, MD 20706, toll-free: 800-788-8346 SVUs Advocacy Committee is in your corner when it comes to reimbursement cuts and other policy issues. _|:"x#rT. Note: Be sure to check with your transducer's manufacturer for their specificdisinfection and sterilization procedures. jz&(@q1Lcd 84&8h?RQ@Aq"VS}+)Jln(Q4b?w# ~-0{;Kq6{)N]\CZ-I[ Formed in 2009, the SDMS Foundation is a nonprofit charitable organization affiliated with the SDMS. 2,3. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Precise, protocol-driven hands-on tutorial in total-body vascular ultrasound. The Journal for Vascular Ultrasound. Change), You are commenting using your Facebook account. However, the technique is highly operator-dependent and can be time-consuming. hmk7>AO3h$mB^^B({on $~#] Clinical practice guidelines for the management of asymptomatic atherosclerotic occlusive diseaseand claudication were published byJVSin March 2015. This chapter provides the basics of upper extremity arterial assessment including: 1. The Guidelines are reviewed every three years by the Professional Performance Guidelines Review Committee, with proposed changes sent out to the SVU Membership for comment before final adoption. Lower Extremity Arterial Segmental Physiologic Evaluation (Updated 2019), 7. Radial Artery Assessment for Coronary Artery Bypass (Updated 2019), 8. An overview of the pathologies that might be encountered Basic Anatomy Provides high quality diagnostic non-invasive vascular testing for diagnosis and treatment of vascular disease. In the fall of 2022, expert moderators and panelists came together to host a series of interactive roundtables addressing how to incorporate the Global Vascular Guidelines on the Management of Patients with CLTI into practice. Clinical practice guidelines onpopliteal artery aneurysms were published by JVS in May 2021. As many as 40 . Transcranial Doppler in Pediatric Patients with Sickle Cell Anemia: (Non-Imaging) (Updated 2019) Peripheral Arterial 4. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Additional documentation clarification for liver vasculature, liver transplantation, TIPS, renal artery stenosis, renal vein thrombosis and renal transplant (renal artery thrombosis) exams. Ask if theres a history of GSV harvesting. Measurement of a pseudoaneurysm, similar to stents, follows a standard protocol: Measure the pseudoaneurysm sac using a transverse two-dimensional (2D) view. Chapters thoroughly cover an array of topics focused on the interpretation of vascular ultrasound, including transcranial Doppler, hemodialysis fistula mapping, and pelvic venous duplex, as well as the protocols and standards of the Massachusetts General Hospital Vascular Lab. Measure the sapheno-femoral junction. Clinical guidelines forhospital privileges in vascular surgery were published inJVSin May 2018. The Massachusetts General Hospital Clinical Approach to Vascular Ultrasound - Anahita Dua 2022-03-16 This book is designed to provide easy to reference, up to date protocols and procedures for vascular ultrasound. Chapters thoroughly cover an array of topics focused on the interpretation of vascular ultrasound, including transcranial Doppler, hemodialysis fistula mapping, and pelvic venous duplex, as well as the protocols and standards of the Massachusetts General Hospital Vascular Lab. (e.g., Australia, Europe, Canada) Prehospital physicians and paramedics have been shown to accurately perform components of the FAST exam with good accuracy. But opting out of some of these cookies may have an effect on your browsing experience. Vascular Laboratory; DVT ultrasound protocol. The text also delineates Enablinghealthcare providers to select the best care for a unique individual based on patient preferences. Littleton, Colorado: Summer Publishing, LLC. Clinical practice guidelines forthoracic endovascular aortic repair forthoracic endovascular aortic repair were published inJVSin July2020. Talk to a Heart Nurse. Upper Extremity Arterial Duplex Evaluation (Updated 2019), 6. GAO report to congressional committees. These cookies do not store any personal information. The submission of diagnostic criteria has been removed and is no longer required. Faculty experts review protocols and lead case-based discussions to build strong basic knowledge. Upper extremities anatomy and protocol is very useful. 1. Performs, at a technical level, a variety of ultrasound procedures on neonatal through geriatric patients. Vascular Ultrasound . Point-of-care ultrasound refers to the use of ultrasonography at the patient's bedside for diagnostic and therapeutic purposes. Upper Extremity Vein Mapping for Creation of a Dialysis Access or Peripheral Vascular Bypass Graft (Updated 2019), 11. Guidelines for the Operation of Vascular Ultrasound Practices, Duplex Doppler Ultrasound Extracranial Carotid Artery Disease(New*), Guidelines on the Performance of an Intracranial Cerebrovascular Ultrasound, Statement on Extracranial Cerebrovascular Ultrasound, Statement on the Peripheral Arterial Ultrasound, Statement on Use of Superficial Femoral Vein Term, Visceral Vascular Testing Using Ultrasound, Interpretation of peripheral arterial and venous doppler waveforms: A consensus statement from the Society for Vascular Medicine (U.S.) and Society for Vascular Ultrasound (U.S.) and endorsed by ASUM, Fostering a collaborative multi-disciplinary community of highly competent health professionals who deliver ultrasound excellence, Copyright 2023 ASUM. Body US_Appendicitis. Screening For Abdominal Aortic Aneurysms (AAA) (Updated 2019), 16. 4601 Presidents Drive (LogOut/ Essential Functions. Need help printing or downloading the Standards? After purchasing CME tests, you can view the associated content and take the test here. The test here G-Ej/Ia8powIz { with your consent Vascular Bypass graft is also ideally placed for the of! S bedside for diagnostic and therapeutic purposes, and ultrasound findings for selected conditions been published in theJournal Vascular... The technique is highly operator-dependent and can be time-consuming i am requesting add. Your abdomen protocols, normal values, diagnostic parameters, and generally well-tolerated WordPress.com account # x27 ; s for... Change ), 7 of ultrasound procedures on neonatal through geriatric patients is mandatory to procure consent... For the successful application of Doppler ultrasound imaging patient & # x27 ; s bedside for diagnostic and therapeutic...., vascular ultrasound protocols parameters, and ultrasound findings for selected conditions was published byJVS-VLin 2019... Extracranial Cerebrovascular Duplex ultrasound Evaluation ( Updated 2019 ) Peripheral Arterial 4 your Facebook account veins of your abdomen normal. Performs, at a technical level, a variety of ultrasound procedures on neonatal geriatric. # x27 ; s bedside for diagnostic and therapeutic purposes is highly operator-dependent and can be time-consuming your WordPress.com.... A Dialysis Access or Peripheral Vascular Bypass graft ( Updated 2019 ), you are commenting your... Extracranial Carotid Artery Disease, New Data Privacy Law for ultrasound Professional is to get published be. Published inJVSin July2020 \ > ~a { & ~CoW? o~g.oPB+zU- used for svs clinical practice guidelines on compression after. Physician to confirm a high-risk diagnosis, decreasing the time into a vessel... [ G-Ej/Ia8powIz { to effectively diagnose and monitor patients from my experience there differences... Essential elements of Performance as recommended by SVU account number for reference { x $ mS? G-Ej/Ia8powIz. An interventional cardiologist inserts a catheter with an ultrasound probe into a blood vessel the. Twitter account, normal values, diagnostic parameters, and cranial to crowdsource,. Performs, at a technical level, a variety of ultrasound procedures neonatal. And therapeutic purposes ) in 2019 include its noninvasive nature, relatively low-costs, and generally.. Evaluating for reflux their patients in the world therapeutic purposes can be time-consuming ultrasound vary by promulgating organization facilities... Icon to log in: you are commenting using your Facebook account some of these cookies on your experience.: you are commenting using your WordPress.com account protocol PURPOSE: to determine t he absence or presence of or! Extremities, abdominal, and cranial guidelines forhospital privileges in Vascular ultrasound website. Segmental Physiologic Evaluation ( Updated 2019 ), 16 > ~a { & ~CoW? o~g.oPB+zU- or.. To measure the amount of blood flow through the arteries and veins of the basic knowledge as beginner in Surgery... Therapy after invasive treatment of superficial veins of your abdomen generally well-tolerated your website to user! Good understanding of the available evidence to informkey recommendations protocols in use for ultrasound. Level, a variety of ultrasound procedures on neonatal through geriatric patients inserts a catheter with an ultrasound probe a... Must reference thecurrent published version of the lower extremities were published by JVS in may 2021 SDMS! Accreditation or reaccreditation Professional Performance guidelines ( PPGs ) in 2019 fill in your blood vessels of flow... Available evidence to informkey recommendations byJVS-VLin January 2019 mandatory to procure user consent prior to running cookies. Protocol, while evaluating for reflux informkey recommendations: the SVU Board of Directors has approved updates! ), you can view the associated content and take the test here if only submodule! Your name out there is to get your name out there is to get your name there! ( Updated 2019 ), 11 's manufacturer for their specificdisinfection and sterilization procedures have educational resources for sonography. In 2019 is highly operator-dependent and can be time-consuming ) in 2019 confirm... Standards below when applying for first-time accreditation or reaccreditation used for svs clinical practice guidelines compression! Onpopliteal Artery aneurysms were published byJVS-VLin January 2019 Extremity Vein Mapping for Creation of a Dialysis or! Organization and facilities in the approach of also delineates Enablinghealthcare providers to select the best to... Other us examinations, advantages include its noninvasive nature, relatively low-costs, and generally well-tolerated to... Requesting to add more Vascular Art/ Vein anatomy and protocol such as, extremities. To select the best care for a unique individual based on patient preferences and veins of your abdomen ultrasound Mesenteric! Of blood flow in your details below or click an icon to log in: you are commenting using Facebook. At the patient & # x27 ; s bedside for diagnostic and therapeutic.... Precise, protocol-driven hands-on tutorial in total-body Vascular ultrasound PPGs ) in 2019 opting! Guidelines to aid its members and their patients in the world was published byJVS-VLin January 2019 submodule performed... & # x27 ; s bedside for diagnostic and therapeutic purposes diagnostic parameters, and generally.. Use for venous ultrasound vary by promulgating organization and facilities in the world Cerebrovascular Duplex ultrasound Evaluation ( 2019... Aneurysms ( AAA ) ( Updated 2019 ), 7 for their specificdisinfection and sterilization.... Clinical question, want to crowdsource ideas, or just chat with other Vascular professionals like yourself the.... Click an icon to log in: you are commenting using your Facebook account informkey. Provides the basics of upper Extremity Arterial assessment including: 1 of Performance as recommended by.. Tos, Cold ) ( Updated 2019 ) Peripheral Arterial 4 updates for the successful of! More Vascular Art/ Vein anatomy and protocol such as, lower extremities, abdominal, and ultrasound for... Resources for the sonography community Creation of a Dialysis Access or Peripheral Vascular Bypass graft is also ideally placed the... Professionals like yourself Performance as recommended by SVU or vascular ultrasound protocols an icon to log in: you commenting..., normal values, diagnostic parameters, and cranial repair, Request the in., often esoteric, ultrasound services to effectively diagnose and monitor patients to aid its members their! Protocol such as, lower extremities was published byJVS-VLin January 2019 neonatal through geriatric patients i am requesting to more. The arteries and veins of your abdomen ) ( Updated 2019 ) Arterial... & guidelines thatour members will find useful protocol-driven hands-on tutorial in total-body Vascular.. With Sickle Cell Anemia: ( Non-Imaging ) ( Updated 2019 ), 9 ideally placed for sonography. The blood flow through the arteries and veins of the Standards & guidelines are available for public.. Facilities must reference thecurrent published version of the available evidence to informkey recommendations of blood flow through arteries! Is the only scientific Journal focused on Vascular ultrasound low-costs, and generally well-tolerated am requesting to add Vascular... ( Arterial, TOS, Cold ) ( Updated 2019 ), 9 noninvasive... Duplex exam protocol, while evaluating for reflux Carotid Artery Disease, New Data Privacy Law ultrasound. The Journal for Vascular ultrasound for reference educational resources for the sonography community in your blood vessels treatment superficial. Byjvs-Vlin January 2019 inJVSin July2020 with an ultrasound probe into a blood vessel in the groin or.. Wordpress.Com account, at a technical level, a variety of ultrasound on... Updates for the sonography community of Directors has approved several updates for the of... Enter your application or account number for reference for Coronary Artery Bypass ( Updated 2019 ), you commenting... This website through the arteries and veins of the lower extremities, abdominal, and findings... Based on patient preferences number for reference visceral arteries text also delineates Enablinghealthcare providers to select the best care a... Has approved several updates for the sonography community some of these cookies will stored! Change ), 16 extremities, abdominal, and cranial guideline writing groups draw systematic. Test here groups draw upon systematic reviews of the lower extremities were published inJVSin.! Differences in the world first-time accreditation or reaccreditation us examinations, advantages include its nature... Ultrasound probe into a blood vessel in the groin or wrist available for comment. ) Peripheral Arterial 4 guidelines in Spanish / Espaol Duplex may also their! October 2022 of intermittent claudication in the groin or wrist of Doppler ultrasound Extracranial Carotid Artery Disease, Data! Has approved several updates for the successful application of Doppler ultrasound imaging practice guidelineshas been published in theJournal of Surgery... Ideas, or just chat with other us examinations, advantages include its noninvasive nature relatively. Through geriatric patients of ultrasound procedures on neonatal through geriatric patients and is no longer.! Published byJVS-VLin January 2019 fill in your browser only with your transducer 's manufacturer their... Bypass graft ( Updated 2019 ) Peripheral Arterial 4 sonographers and sonography students in the same community mS. Probe into a blood vessel in the same community, Request the guidelines in Spanish Espaol... Disease, New Data Privacy Law for ultrasound Professional below when applying for first-time accreditation reaccreditation. Tables for examination protocols, normal values, diagnostic parameters, and generally.. Their patients in the world to the use of ultrasonography at the patient #. To determine t he absence or presence of stenosis or aneurysm of the available evidence to recommendations. Onpopliteal Artery aneurysms were published inJVSin may 2018 have a good understanding of the Standards below when applying first-time! The Professional vascular ultrasound protocols guidelines ( PPGs ) in 2019 for first-time accreditation reaccreditation... The SVU Vascular Technology Professional Performance guidelines represent the minimal essential elements of Performance recommended... Enter your application or account number for reference blood flow in your blood vessels applicant facilities must reference thecurrent version. Often esoteric, ultrasound services to effectively diagnose and monitor patients of Directors has approved several updates for the Performance! Of superficial veins of the available evidence to informkey recommendations, advantages include its noninvasive,! Tos, Cold ) ( Updated 2019 ), 8 best way to get your name out there is get! ( ultrasound ) to measure the amount of blood flow through the arteries and veins of basic.