Anaes SAQs · Ultrasound-guided peripheral nerve blocks
Sonoanatomy and ultrasound-guided regional anaesthesia
Final-viva question on sonoanatomy: the echoic appearance of fascia/nerve/muscle/vessel/bone, anisotropy, the in-plane vs out-of-plane needle approaches with dynamic needle tip positioning, machine optimisation, and the safety measures (aspiration, Doppler, incremental injection, tip visualisation) that prevent intraneural and intravascular injection.
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Prompt
Describe the principles of ultrasound-guided regional anaesthesia: the appearance of tissues, anisotropy, the in-plane and out-of-plane needle approaches, and the measures that prevent intraneural and intravascular injection.
Question
Describe the principles of ultrasound-guided regional anaesthesia: the appearance of tissues, anisotropy, the in-plane and out-of-plane needle approaches, and the measures that prevent intraneural and intravascular injection[2][3][4][5].
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]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
- [3]Marhofer P, Greher M, Kapral S Ultrasound guidance in regional anaesthesia. Br J Anaesth, 2005.PMID 15277302
- [4]Chin KJ, Perlas A, Chan VW, Brull R Needle visualization in ultrasound-guided regional anesthesia: challenges and solutions. Reg Anesth Pain Med, 2008.PMID 19258968
- [5]Sites BD, Brull R, Chan VW, et al. Artifacts and pitfall errors associated with ultrasound-guided regional anesthesia: Part II: A pictorial approach to understanding and avoidance. Reg Anesth Pain Med, 2010.PMID 20216030