Polyamide (Nylon) Sutures

What Linex Nylon Suture Is

Linex is a non-absorbable, sterile surgical monofilament suture composed of long-chain aliphatic polymers of nylon 6. Also known as a polyamide suture, it is intended for soft tissue approximation, particularly skin and subcuticular closure, where smooth passage through tissue and minimal tissue drag are required. The material is biologically inert with minimal tissue reactivity and retains high in vivo tensile strength.

Composition and Construction

The suture material is monofilament polyamide (Nylon 6). Where dyed, Linex uses Logwood extract approved under USFDA regulation 73.1410, and is supplied in blue and black. As an uncoated monofilament, it presents a single-strand structure that reduces bacterial wicking compared with braided constructions. Where needled, sutures are attached to stainless steel surgical needles of varying types and sizes. The product complies with United States Pharmacopoeia (USP) and European Pharmacopoeia (EP) requirements.

Handling and Characteristics

Because it is monofilament, Linex passes through tissue easily and exhibits negligible tissue adherence, which supports its use as a pull-out suture and eases removal. Its elasticity contributes to strength in fine sizes and supports secure knot formation in delicate tissue. As with all monofilament polyamide, standard flat, square ties with additional throws are appropriate for adequate knot security. Recorded tissue reaction is Grade-0.

Presentations

Linex is available in a broad range of USP sizes from 10-0 through 2, either non-needled or attached to stainless steel needles in numerous profiles, needle lengths and suture lengths. It is applied in general closure, skin and plastic surgery, and in ophthalmic and microsurgical procedures where clinically appropriate.