SPINE INJECTION-NEEDLE CONTROL

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SUMMARY

1. Leverage: used for thicker needles. Leverage a thicker needle, using the skin as a fulcrum.
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2. Bevel control: understanding and using the needle’s property of movement away from the bevel is known as bevel control. Because of the angulation of the bevel in a Quincke needle, the needle moves in the direction of the sharper, pointed needle tip, which is away from the bevel.
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(The notch, at the proximal end of the needle, denotes the side on which the bevel is placed)

3. Concavity (finger fulcrum): used for thinner, higher gauge needles. When exaggerated movements are needed, concavity can be used to sharply change directions without retracting the needle, especially when thinner needles are used.
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Images:
Furman, Michael B., and Leland Berkwits. Atlas of Image-Guided Spinal Procedures. Elsevier, Inc, 2017.