Duplex sonography of the extremities is a non-invasive and valuable tool in detecting diseases in the blood vessels of the arms and legs. This post will cover the basic evaluation of the upper and lower extremity arterial systems. Indications 1. DETECTION OF STENOSIS OR OCCLUSIONS IN SEGMENTS OF THE PERIPHERAL ARTERIES. 2. MONITORING OF SITES… Read More Arterial Duplex/Doppler Sonography of the Upper Extremities
Anatomy The Portal Vein is made up three main vessels the Superior and Inferior Mesenteric veins and the Splenic vein. When these three vessels converge they become the Main Portal Vein which enters the Liver via the porta hepatis along with the hepatic artery and common bile duct (cbd exits the liver), aka the Portal… Read More Portal Vein Doppler
Nutcracker syndrome is a vascular compression disorder. The left renal vein courses in between the Aorta and Superior Mesenteric Artery(SMA). If the descent of the SMA is to steep and the aorto-mesenteric angle to acute (normal angle is 38–65°) this could lead to left renal vein compression and Nutcracker syndrome/phenomenon. The difference between Nutcracker syndrome… Read More Nutcracker Phenomenon/Syndrome
Authors: Henry Suarez RDMS, RVT; Richard Garay R.T. (S), RDMS, RVT Reflux Today we have a case to evaluate for the presence of “ venous reflux”.“Venous reflux” is a common abnormality due to valvular incompetence leading to the conditionknown as venous insufficiency. Venous insufficiency is caused by the backwards flow of blood in the veins… Read More Venous Insufficiency Case/Protocol
Transducer I use a 6 MHz (dropping the frequency between 4-5 if necessary) Curvilinear abdominal transducer and the 9 MHz linear transducer to get higher res doppler, gray scale and bflow images. If the patient is obese you may use a sector transducer. I like to begin the exam examining the native kidneys. Now a… Read More Renal Transplant Duplex Protocol
Authors: Henry Suarez RDMS, RVT; Richard Garay R.T. (S), RDMS, RVT Hemodialysis Hemodialysis is a medical procedure that uses a dialysis machine to filter wastes and water from your blood in cases of renal failure. In order to use a hemodialysis machine the patient needs access to their blood supply. This is achieved with a hemodialysis… Read More Hemodialysis Vascular Access
Proximal Aorta The aorta is the largest artery that carries oxygenated blood from the heart to the viscera and extremities. Here I share with you the protocol for scanning aortic duplex ultrasounds. Start in the epigastric region at the proximal abdominal aorta and take sagittal grayscale, color Doppler and spectral Doppler and measure the diameter… Read More Aorta Duplex/Doppler Protocol
Continuing with the series, here’s the videos for RVT. Stay tuned for other specialties coming in the following weeks!
Welcome to a primer on Upper and Lower Extremity duplex sonography.… Read More Arterial Doppler/Duplex of the Lower Extremities
Transcranial Doppler is used to identify and interrogate the intracerebral arterial system. Normally the skull is impenetrable to Ultrasound waves, but using certain windows allows adequate penetration to monitor cerebrovascular hemodynamics.… Read More Transcranial Doppler
Sonographic Tendencies 