Needles and Suture Thread - Surgeons historically used reusable needles with separate suture thread. - Swaged needles consist of a pre-packed needle attached to a specific length of suture thread. - Atraumatic needles have a narrower suture end, reducing tissue trauma. - Needles can be straight, various curved shapes, or compound curve.

Suture Materials - Suture material can be absorbable or non-absorbable. - Monofilament fibers have less tensile strength but create less tissue trauma. - Polyfilament (braided) sutures have greater tensile strength but can cause greater tissue reaction. - Natural absorbable materials include plain catgut, chromic catgut, and fast catgut.

Natural Absorbable Materials - Plain catgut, chromic catgut, and fast catgut are produced from collagen extracted from bovine intestines. - Plain Gut maintains strength for 7-10 days and degrades fully in 10 weeks. - Chromic Gut maintains strength for 21-28 days and degrades fully in 16-18 weeks. - Fast Gut is treated with heat for more rapid absorption and has a tensile strength of less than a week.

Absorbable vs Non-absorbable Sutures - Absorbable sutures are degraded via proteolysis or hydrolysis and are used internally or for individuals unlikely to return for suture removal. - Short-term wound outcomes are equivalent for absorbable and non-absorbable sutures. - Natural absorbable materials have high tissue reactivity, while non-absorbable synthetic sutures have the lowest tissue reactivity. - Non-absorbable sutures require removal, while absorbable sutures are not removed.

Suture Techniques - Types of Stitches/Suturing Techniques: interrupted stitch, mattress stitch, continuous stitch, continuous locking stitch, chest drain stitch, corner stitch. - Placement: mounting needle, pressing into flesh, tying knot. - Stitching Interval and Spacing: considerations for wound lengthening and burst wounds. - Layers: single layer vs two layer suturing. - Removal: timing of suture removal, techniques for removal.