Anaes Vivas · Ultrasound-guided peripheral nerve blocks
Sonoanatomy — equipment and data viva
An equipment/data viva on reading an ultrasound block image: identifying the nerve, vessel and fascia, the anisotropy and Doppler aids, the in-plane vs out-of-plane needle, dynamic needle tip positioning, and the signs of correct spread versus intraneural or intravascular injection.
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Prompt
You are shown an ultrasound image of a peripheral nerve with a needle approaching it. Describe what you see, the needle approach being used, and how you would confirm the tip is correctly placed and the injection is safe.
Stimulus
You are shown an ultrasound image of a peripheral nerve with a needle approaching it. Describe what you see, the needle approach being used, and how you would confirm the tip is correctly placed and the injection is safe[2][3].
References5ShowHide
- [1]Tire Y, et al. Current Status and Future Projections of Artificial Intelligence-Assisted Ultrasonography and Needle Visibility Methods in Regional Anesthesia. Eurasian J Med, 2026.PMID 42364233
- [2]Natto O, et al. Eye-tracking technology applied to regional anaesthesia task performance, safety and skill acquisition: a scoping review. Br J Anaesth, 2026.PMID 42350172
- [3]Mao K, et al. Dynamic needle tip positioning may improve first-attempt success rate in short-axis radial artery cannulation: A systematic review and meta-analysis of randomized trials. J Int Med Res, 2026.PMID 42319179
- [5]Foster KE, et al. The role of emerging technology in expanding regional anesthesia education and patient access. Curr Opin Anaesthesiol, 2026.PMID 42267500
- [6]Marhofer P, Greher M, Kapral S Ultrasound guidance in regional anaesthesia. Br J Anaesth, 2005.PMID 15277302