Curved or straight? Choosing the right surgical scissors

What curvature does

Curved blades let the surgeon see the tips and keep the hand away from the line of sight. The convex or concave side can be turned toward the tissue plane, which makes it easier to spread and cut in a controlled manner. This is why curved surgical scissors dominate dissection in the neck, abdomen and pelvis.

Straight blades give a predictable cutting line and are generally preferred for cutting sutures, drapes, dressings and tougher structures close to the surface. They are also easier to sharpen and to inspect for alignment.

As a rule of thumb, use curved scissors when you need to visualise and direct the cut within a space, and straight scissors when the cutting line matters more than the view.

Blunt versus sharp tips

Blunt-blunt scissors minimise the risk of puncturing adjacent structures and are used for spreading and cutting where tissue is vulnerable. Sharp-sharp scissors give a finer tip and are suited to superficial incisions, cutting sutures close to the knot and dissecting thin layers. Blunt-sharp combinations offer a compromise for general work.

Tip shape is often given as a code in the product name, so check whether you are ordering straight, curved, blunt or sharp, since patterns such as Mayo and Metzenbaum come in all combinations. See Metzenbaum versus Mayo scissors for their typical roles.

Sharp tips also demand more care in handling and in the sterile processing department, because they can puncture gloves, pouches and wrapping if they are not protected.

• Blunt-blunt: delicate or vulnerable tissue
• Sharp-sharp: superficial work and fine cutting
• Blunt-sharp: general-purpose compromise

Matching scissors to the task

Mayo-style curved scissors suit heavier tissues such as fascia, while lighter Metzenbaum patterns, which have longer slimmer blades, are for dissecting delicate planes. Straight Mayo scissors typically cut sutures and thick materials. Lister bandage scissors have a specially angled blunt tip for sliding under dressings.

REDA's surgical scissors range covers Metzenbaum, Mayo and Mayo-Stille dissecting scissors, Potts-Smith, DeBakey and Dietrich vascular scissors, Lister bandage scissors, and iris and micro scissors. Our overview of surgical scissors types sets out each family in more detail.

Blade variants: SuperCut, TC and black finish

Besides curvature and tip shape, blade design affects performance. REDA offers SuperCut scissors with a saw-edge blade, TC versions with tungsten carbide inserts and BLACK dissecting scissors. A micro-serrated edge helps keep thin tissue from slipping away, while TC edges are chosen for longer service between sharpenings.

Whichever variant you pick, check that the blades meet smoothly along their whole length and that the pivot screw is tight without binding. Poor alignment is the most common reason scissors tear rather than cut.

Setting up a scissors assortment

Most trays need at least one straight and one curved pair in the working length used by the team. For deeper cavities a longer pair is added; see our guide to scissors sizes. Standardising on a small number of patterns reduces the inventory and makes reprocessing easier.

Beckfinity can help you shortlist patterns from the REDA catalogue for general surgery or specialty trays. Contact us with your tray lists to request a quotation.

Ask for a sample pair of each shortlisted pattern and have the theatre team use them in a real set-up before you standardise.