Figure 3. For higher-volume blocks (more than 10 cc), we recommend a two-operator technique. The operator is using an in-plane technique to perform a distal sciatic nerve block in the popliteal fossa. A) NS flush is attached to the IV tubing and block needle. Fluid is flushed to remove air from the circuit. B) After scanning the area and placing a skin wheal (with the insulin or TB syringe), hydrodissect the tissue with NS gently until the needle tip is in the ideal location for anesthetic placement. Remove the NS flush and attach the 10-cc syringe of local anesthetic. Inject slowly (aspirating after every 1–2 cc to ensure lack of vascular puncture) with clear needle tip visualization.
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