A Guide to Veterinary Sutures: Choosing the Right Suture for Every Procedure

Introduction

In veterinary surgery, the suture you choose can be just as important as the technique you use. Whether you're closing a routine spay, repairing a traumatic wound, or performing complex orthopaedic work, selecting the right suture material ensures optimal healing, minimises complications, and supports the best possible outcome for your patient.

This guide covers the key suture types used in veterinary practice, what to consider when choosing them, and how suture quality directly impacts surgical success.

Absorbable vs Non-Absorbable Sutures

The first decision in suture selection is whether you need an absorbable or non-absorbable material.

Absorbable sutures are broken down by the body over time through hydrolysis or enzymatic degradation. They are ideal for internal tissues where suture removal is impractical — such as subcutaneous layers, muscle, and visceral organs. Common absorbable sutures used in veterinary practice include:

• Poliglecaprone 25 (e.g. Monocryl) — a monofilament with excellent tensile strength and minimal tissue reactivity, ideal for soft tissue approximation
• Polyglactin 910 (e.g. Vicryl) — a braided suture offering reliable knot security, widely used in general and orthopaedic surgery
• Polydioxanone (PDS) — a monofilament with prolonged tensile strength retention, suited to slow-healing tissues

Non-absorbable sutures remain in the body indefinitely unless removed. They are used for skin closure, cardiovascular surgery, and situations requiring long-term tissue support. Common options include:

• Nylon (e.g. Ethilon) — a monofilament with high tensile strength and low tissue reactivity, the gold standard for skin closure
• Polypropylene (e.g. Prolene) — extremely inert, ideal for cardiovascular and ophthalmic procedures
• Silk — a braided natural fibre with excellent handling, though higher tissue reactivity limits its use to specific applications

Monofilament vs Braided

Beyond absorbability, the physical structure of a suture affects its handling and suitability:

• Monofilament sutures pass through tissue smoothly, resist harbouring bacteria, and cause less drag — making them preferable where infection risk is a concern
• Braided sutures offer superior knot security and are easier to handle, but their interstices can harbour microorganisms, making them less suitable for contaminated wounds

Needle Selection

The needle is as important as the suture material. Key considerations include:

• Cutting needles — for tough tissues such as skin; reverse cutting needles reduce the risk of tissue tear-through
• Taper point needles — for delicate or easily penetrated tissues such as viscera and muscle
• Needle size and curvature — matched to the depth and accessibility of the surgical site; 3/8 circle for superficial work, 1/2 circle for deeper cavities

USP Size and Tensile Strength

Suture gauge is expressed as a USP (United States Pharmacopeia) size. The higher the number of zeros, the finer the suture — for example, 6-0 is much finer than 2-0. Matching suture size to tissue type is critical: using too heavy a suture in delicate tissue causes unnecessary trauma, while too fine a suture in high-tension areas risks dehiscence.

Why Suture Quality Matters

In veterinary surgery, suture quality directly affects patient outcomes. Premium sutures from trusted manufacturers offer:

• Consistent tensile strength and absorption profiles
• Reliable sterility and packaging integrity
• Predictable knot performance
• Reduced tissue drag and trauma

Cutting corners on suture quality is a false economy — the cost of a wound breakdown, infection, or repeat procedure far outweighs the saving on materials.

Conclusion

Choosing the right suture is a clinical decision that deserves the same care as any other aspect of surgical planning. Understanding the properties of absorbable and non-absorbable materials, monofilament and braided constructions, and appropriate needle selection will help you achieve consistent, high-quality surgical outcomes for every patient.

At SutureVet, we stock a comprehensive range of premium veterinary sutures from leading manufacturers, with expert guidance available to help you select the right product for every procedure.