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lower limb doppler examination -The essentials
This document provides an overview of performing lower limb doppler examinations to diagnose deep vein thrombosis and other causes of limb pain. It discusses the essential techniques including recognizing the vessels, avoiding pitfalls, applying compression, and following the anatomy. Criteria for diagnosing DVT include vessel expansion, compressibility, presence of thrombus, and absent or reduced blood flow waves. The document also reviews using doppler to diagnose and grade arterial stenosis by analyzing spectral wave patterns and meanings.
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lower limb doppler examination -The essentials
- 1. Lower limb dopplerexamination: The essentials Dr/Ahmed Bahnassy Consultant Radiologist MBCHB-MSc-FRCR(UK)
- 2. Aim of thelecture • Outlining the technique of peripheral doppler examinations. • Diagnosing deep vein thrombosis,without pitfalls. • Recognizing the other causes of limb pain. • Understanding how doppler can diagnose and grade arterial stenosis.
- 3. physics basics ofdoppler(revision)
- 9. First step:recognize thevessels
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- 12. Avoiding pitfalls great saphenousvein dilated
- 13. Second step:apply compression avoidtoo much pressure
- 14. normal compression inlower level
- 15. skip compression ondeep vessels external iliac vein thrombosis EIA with catheter
- 16. Third step:follow theanatomy
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- 18. Leg veins..12 veins 20%ofmassive PE will come from them 20% will propagate to CFV
- 19. Difficult segment analysis:distal SFV manualcompression
- 20. changing the probefrequency
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- 23. Criteria of diagnosisof DVT expansion-Uncompressibility- thrombus -absent flow waves-no augmentation
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- 26. thrombosed medial limbof duplicated SFV
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- 30. M-mode use external iliacvein foating thrombus with M- mode
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- 34. remote effect onperipheral veins
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- 43. muscular cause oflimb pain
- 44. muscular cause oflimb pain
- 45. muscle tear andhaematoma
- 46. Baker cyst..problems ofevaluation
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- 61. the first jump:spectralevaluation
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- 67. wave shape anddisease
- 68. Second jump :meaningof wave
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- 71. Third jump:grades ofstenosis
- 72. spectral window..your windowto diagnose
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- 75. minor laminar flow disturbance..spectralbroadening and filling in
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- 77. stenosis and shapeof waves
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- 92. Loss of arterialelasticity
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- 101. Aliasing ..a blessingor curse
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