SPINE INJECTION-NEEDLE CONTROL

From NeuroRehab.wiki

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.


Reference(s)

Furman, Michael B., and Leland Berkwits. Atlas of Image-Guided Spinal Procedures. Elsevier, Inc, 2017.
Horowitz AL. MRI Physics for Physicians. Springer Science & Business Media. (1989) ISBN:1468403338.
Mangrum W, Christianson K, Duncan S et-al. Duke Review of MRI Principles. Mosby. (2012) ISBN:1455700843.