Superior Mesenteric Artery (SMA) Doppler Ultrasound Normal Vs Abnormal Images | Vascular USG Cases скачать в хорошем качестве

Superior Mesenteric Artery (SMA) Doppler Ultrasound Normal Vs Abnormal Images | Vascular USG Cases

Support the channel on Patreon: patreon.com/drsamsimaginglibrary Superior Mesenteric Artery (SMA) Doppler Ultrasound Normal Vs Abnormal Images | Vascular USG Cases Normal SMA (Fasting): Sharp systolic Peak High resistance flow Variable flow during diastole (slow forward flow/flow reversal) PSV: 110 to 180 cm/s approx. EDV: Less than 55 cm/s approx. (variable) RI: 0.5 to 0.7 Normal SMA (Post-Prandial) Increased PSV and EDV Flow reversal absent Low resistance flow ≥70% SMA Stenosis: Narrowing of SMA lumen PSV ≥ 275cm/s Causes mesenteric ischaemia SMA Dissection: Intimal Flap: An intimal flap is a membrane-like structure that oscillates with the heartbeat within the vessel lumen, dividing it into true and false lumens. This is a direct sign of dissection. Presence of a False Lumen: The hallmark of artery dissection is the presence of a false lumen created by the intimal tear. This may appear as an additional, parallel channel within the SMA on ultrasound.