What are the categories of surgical instruments?

Why classify by function

There are thousands of patterns, many named after the surgeons who designed them. Grouping them by function reduces that to a handful of families and lets a nurse predict what an unfamiliar instrument is for. Catalogues, including REDA's general surgery section, follow roughly the same logic.

The groups below are the ones used in most teaching programmes. Some instruments cross groups, and specialty fields add their own, but the framework holds for general work.

Learning the families first, then the eponyms, is also the fastest way for new staff to become useful in the theatre; see how to learn surgical instruments.

Cutting and dissecting instruments

This group includes scalpel handles with blades, scissors, osteotomes and chisels, and rongeurs. Scalpels make the primary incision, while scissors such as Metzenbaum and Mayo patterns dissect or divide tissue and suture. Bone-cutting instruments belong here too.

Quality here is judged by edge retention and alignment. Read more about the family in surgical scissors types.

Dissecting instruments are further split into sharp dissection with a blade or scissors and blunt dissection by spreading with closed scissors or a dissector, and the choice depends on the tissue plane.

Grasping and holding instruments

Forceps with or without teeth hold tissue; towel clamps hold drapes; bone-holding forceps secure bone. Toothed and non-toothed thumb forceps are the everyday examples. For a closer look, see types of surgical instruments, names and uses.

Grasping instruments need matched tips and balanced spring tension, which determine how much pressure the tissue receives.

Grasping instruments can be traumatic, with teeth, or atraumatic, with fine grooves. Matching the grip to the tissue is a core skill in tray preparation, because the same forceps cannot safely hold bowel and skin.

Clamping and occluding instruments

Haemostatic forceps such as Halsted-Mosquito, Crile, Kelly and Kocher compress vessels, while vascular clamps occlude them atraumatically. Ratchets lock the grip. REDA's Forceps section lists these patterns in straight and curved versions and several lengths. See our haemostatic forceps guide.

Clamps differ in jaw serration, from fine to coarse, and in length, which decides how deep they can reach.

Pay attention to the lock. A ratchet that engages incompletely or slips under load makes a clamp unsafe, and it is one of the first things to inspect during reprocessing and when you receive new stock.

• Haemostats for small vessels
• Heavier clamps for pedicles
• Atraumatic vascular clamps

Retracting, suturing and accessory instruments

Retractors hold wounds open: hand-held models such as Langenbeck and Farabeuf, and self-retaining frames. Suturing instruments are mainly needle holders and, in the broader sense, suture needles and scissors. Accessories include probes, suction tubes, dishes, trays and sterilization containers.

Complete sets combine these groups: see the general surgery set and how retractor types differ.

Beckfinity can supply REDA instruments by family, and our team can help you map your current sets to the functional groups. Contact us to request a quotation.

In practice, tray layout follows the sequence of the procedure: knife, scissors, forceps, clamps, retractors, needle holder and suture material. Standardised layouts shorten set-up time and make counts easier.