Mayo Scissors: the complete veterinary guide to types, uses, and Mayo vs. Metzenbaum

Straight, curved, and Mayo-Stille patterns explained — how each performs on fascia, tendon, and suture, and when to reach for a Metzenbaum instead.

IN THIS GUIDE

• 01What are Mayo scissors?
• 02Straight, curved & Mayo-Stille
• 03Mayo vs. Metzenbaum
• 04Clinical uses
• 05How to choose
• 06Care & sterilization
• 07FAQ
• 08Final thoughts

Mayo scissors are heavy-pattern surgical scissors with short, sturdy, blunt-tipped blades used to cut fascia, tendons, sutures, and other tough tissue. Named after brothers William and Charles Mayo of the Mayo Clinic, they come in straight and curved patterns and are a core instrument in veterinary spay, castration, orthopedic, and general soft-tissue surgery.

Last updated: September 8, 2026 · Reviewed by the HK Medical Instruments surgical instruments team

01 / FundamentalsWhat are Mayo scissors?

Mayo scissors are a category of surgical scissor characterized by a roughly 1:1 blade-to-shank ratio, thick blunt/blunt tips, and a robust box-lock joint built to withstand repeated force. Unlike finer dissecting scissors, mayo surgical scissors are designed to cut, not just spread tissue — they're the instrument reached for when the tissue is too dense or fibrous for a delicate scissor to handle without damage.

In veterinary practice, mayo scissors show up constantly: opening the linea alba during a spay, trimming fascia during a castration, cutting suture material at the end of a procedure, and dividing thick connective tissue in orthopedic work.

Explore HK Medical Instruments' full range of veterinary Mayo scissors built for Canadian clinical use.

02 / PatternsTypes of Mayo scissors

Mayo scissors aren't a single instrument — the pattern you choose changes what the scissor is good for. The three patterns every veterinary team should know are straight, curved, and Mayo-Stille.

03 / ComparisonMayo vs. Metzenbaum scissors

The single most common question on the surgical tray comes down to blade-to-shank ratio and the tissue each instrument is built to handle. Mayo scissors have short, thick blades roughly equal in length to the shank, built for cutting tough tissue and sutures. Metzenbaum scissors have long, slender shanks and short, delicate blades, built for blunt dissection of soft, fragile tissue like fat, bowel, and thin muscle.

Reach for Mayo on anything tough, and Metzenbaum on anything delicate.

Both instruments have their place on the same tray — most spay and castration packs include both a Mayo and a Metzenbaum for exactly this reason. HK Medical Instruments carries a full line of Metzenbaum scissors alongside its Mayo range.

04 / Clinical UseDissecting and suture uses

"Mayo dissecting scissors" and "Mayo suture scissors" usually describe the same instrument used for two different jobs on the same tray. As a dissecting scissor, the curved pattern bluntly separates tissue planes. As a suture scissor, the straight pattern is kept aside specifically for trimming ligatures, since suture material dulls a fine edge far faster than tissue does.

• Spays / neutersOpening and closing the linea alba, cutting ligatures
• CastrationsCutting through fascia and the spermatic cord sheath
• Soft-tissue surgeryDividing fascia, cutting drains, trimming sutures
• Orthopedic workCutting tough periosteum and ligamentous tissue
• Large-animal surgeryHeavier-duty cutting a delicate scissor can't handle

Because Mayo scissors are a workhorse instrument, most instrument packs — including HK Medical Instruments' canine and feline spay packs and general surgery pack — include at least one as standard.

05 / GuidanceHow to choose the right Mayo scissors

1. 1Match the pattern to the primary use. Straight for suture-cutting and surface work; curved for fascia and deeper tissue; Mayo-Stille where an unobstructed view of the cutting line matters.
2. 2Pick a length for your patient size. 14.5 cm (6") suits small-animal work; 17 cm (6¾") gives more reach for larger patients or large-animal procedures.
3. 3Decide on Tungsten Carbide inserts. TC Gold-edged scissors hold an edge significantly longer under heavy suture-cutting use, lowering sharpening and replacement frequency.
4. 4Keep tissue and suture scissors separate. Designating one Mayo scissor for suture only protects the edge of the pair you use on tissue.
5. 5Confirm left- or right-hand fit. A mismatched instrument slows a left-handed surgeon down and increases fatigue over a long surgical day.

Browse the complete Mayo scissors category to compare lengths, patterns, and TC Gold options side by side, or contact HK Medical Instruments for help outfitting a full surgical tray.

06 / MaintenanceCare, sterilization & sharpening

Mayo scissors are autoclavable stainless steel instruments, but a few habits extend their working life considerably:

• ✓Rinse immediately after use to keep blood and tissue from drying in the box-lock joint.
• ✓Clean ultrasonically before autoclaving to remove debris the naked eye misses.
• ✓Lubricate the joint with surgical instrument milk after each sterilization cycle.
• ✓Test the edge regularly — if the scissor "chews" gauze instead of cutting it cleanly, it needs sharpening.
• ✓Never use a tissue-dedicated Mayo scissor to cut suture — the fastest way to dull a good pair.

07 / QuestionsFrequently asked questions

08 / SummaryFinal thoughts

Choosing the right Mayo scissor pattern — straight, curved, or Mayo-Stille — comes down to matching the instrument to the tissue and the procedure. For dense fascia and deep tissue, reach for a curved Mayo; for sutures and surface work, keep a straight Mayo on hand; and remember that a Metzenbaum, not a Mayo, belongs in your hand for delicate dissection.

Sources & further reading: Surgical scissors — Wikipedia; Mayo Clinic history — Wikipedia; Myron Metzenbaum, MD — Encyclopedia of Cleveland History, Case Western Reserve University.