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A: One-handed needle advancement; continuous pressure technique

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Presentation on theme: "A: One-handed needle advancement; continuous pressure technique"— Presentation transcript:

1 A: One-handed needle advancement; continuous pressure technique
A: One-handed needle advancement; continuous pressure technique. The operator applies continuous pressure to the plunger of a loss-of-resistance syringe filled with saline and an air bubble while advancing the needle with the left hand braced against the patient’s back. B: Bimanual needle advancement; intermittent pressure technique. The operator advances the loss-of-resistance syringe with both hands 2-3 mm at a time while appreciating the resistance encountered by the needle. C: In between bimanual advancements of the needle, the operator tests the tissue resistance of the needle tip by bouncing the plunger of the air-filled loss-of-resistance syringe. Many practitioners add a compressible air bubble to a saline-filled syringe and bounce the plunger to ensure that the plunger is moving freely and not sticking to the syringe barrel wall. Source: Chapter 41. Obstetric Anesthesia, Morgan & Mikhail's Clinical Anesthesiology, 5e Citation: Butterworth JF, IV, Mackey DC, Wasnick JD. Morgan & Mikhail's Clinical Anesthesiology, 5e; 2013 Available at: Accessed: November 12, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved

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