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Page 1: Surgical Needles

Surgical Needles

Page 2: Surgical Needles

Contents

1) Anatomy of A Surgical Needle2) Ideal Characteristics Of A Needle3) Shapes/Angle of Curvature4) Points5) Guidelines For Selection.6) Suturing Technique

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Anatomy of a Surgical Needle

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IDEAL CHARACTERISTICS OF A NEEDLE

• Made of high quality stainless steel as thin as possible without compromising strength.

• Stable in the grasp of a needle holder.• Able to carry suture material through tissue – minimal

trauma.• Sharp enough to penetrate tissue with minimal resistance.• Rigid to resist bending• Ductile to resist breaking during surgery.• Sterile and corrosion resistant – no micro organism, no foreign

materials.

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Needle Shapes

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Needle Points1. Cutting points : the cutting edge is on the concave surface. It is

used when tissue is difficult to penetrate such as skin and tendon

2. Reverse cutting: the cutting edge is on the convex surface and is ideal for skin, tendon sheath, or oral mucosa. Reverse cutting needles have more strength than conventional, and a reduced risk of cutting through tissue.

3. Taper point : used in soft tissue such as intestine and peritoneum, the sharp point is at the tip of needle

4. Blunt point : used for suturing friable tissue such as liver and kidney

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Conventional vs Reverse Cutting

Cutting edge on inside of circle

Skin Traumatic

Cutting edge on outside of circle

Skin Less traumatic than

cutting

Conventional Cutting Reverse Cutting

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Blunt vs Lancet

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Taper point vs Trocar point

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General Guidelines for Selection of Needle

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References

• Bailey & Love’s Short Practice of Surgery• http://midlevelu.com/blog/suturing-101-

needles-sizes-and-materials