General Surgery Instruments: Identification and Function

Why Instrument Identification Matters

A sterile processing technician who cannot identify an instrument by name and function is a liability to the surgical team and, ultimately, to the patient. Misidentified instruments lead to incorrect decontamination methods, wrong packaging, missing items on a tray count, and delayed or cancelled procedures. Accurate identification is the foundation of every downstream task you will perform: inspection, assembly, sterilization, and distribution.

How Surgical Instruments Are Categorized

General surgery instruments fall into five broad functional categories:

1. Clamps – grasp, occlude, or compress tissue or vessels

2. Scissors – cut tissue, suture, or dressings

3. Forceps – grasp and manipulate tissue or small objects

4. Retractors – hold tissue aside to expose the surgical field

5. Needle holders – grip and drive suture needles

Learning category first, then individual name, makes memorization systematic rather than random.

Clamps

Kelly clamp – a curved or straight hemostatic clamp with transverse serrations covering only the distal half of the jaw. Used to clamp small blood vessels or tissue bundles. The partial serration allows a gentler grip than a fully serrated clamp.

Crile clamp – similar in appearance to the Kelly but with transverse serrations running the full length of the jaw. Provides a stronger hold; used for slightly larger vessels.

Kocher (Rochester-Ochsner) clamp – a heavy, straight or curved clamp with full horizontal serrations and a single sharp tooth at the tip of each jaw. The teeth grip dense or slippery tissue such as fascia. Because the teeth can cause trauma, this clamp is not used on delicate structures.

Allis clamp – a tissue-holding clamp with multiple fine interlocking teeth along the jaw edges. Used to grasp fascia or other firm tissue for traction. It is traumatic to delicate tissue and must never be used on bowel or blood vessels.

Babcock clamp – a non-crushing, fenestrated (windowed) clamp with smooth, rounded jaws. Designed to encircle and hold tubular structures such as bowel, fallopian tubes, or the appendix without crushing them.

Recognizing ratchets and rings: All clamps have two ring handles, a box-lock joint, and a ratchet mechanism along the shank. When you pick up a clamp, verify the ratchet engages smoothly through at least two clicks and releases without sticking. A faulty ratchet must be tagged and removed from service.

Scissors

Mayo scissors – heavy, blunt-tipped scissors available in straight or curved patterns. The curved version is used to cut heavy tissue, fascia, or suture. The straight version cuts suture and dressings on the back table. Mayo scissors are robust and will withstand firm cutting forces.

Metzenbaum scissors – lighter, longer scissors with a slender blade-to-handle ratio. Used for delicate tissue dissection. Never use Metzenbaum scissors to cut suture—this dulls the blades quickly and renders them unsafe for tissue work.

Iris scissors – very small, fine-tipped scissors originally designed for ophthalmic surgery. In general surgery, used for precise, small incisions. The small size is the key identifier.

Test scissors by opening and closing the blades slowly; they should move smoothly, close evenly, and show no daylight between the blades when fully closed.

Forceps

Thumb (smooth) forceps – spring-tension, tweezer-style instrument with smooth tips. Used to handle delicate tissue or to steady tissue without puncturing it.

Tissue (rat-tooth) forceps – thumb forceps with one or more small interlocking teeth at the tip. Provides a firmer grip on tissue such as skin edges during closure.

Russian forceps – recognizable by the rounded, cup-shaped, serrated tip. Used to grasp tough tissue or to pass needles. The distinctive spoon-shaped end is the visual identifier.

Adson forceps – a short, fine thumb forceps with delicate serrated tips or fine teeth. Commonly used in plastic or superficial procedures to handle skin. Smaller and more refined than standard tissue forceps.

Retractors

Richardson retractor – a hand-held retractor with a right-angle blade. Available in small, medium, and large blade sizes. The scrub technician or assistant holds it to retract the abdominal wall during laparotomy.

Army-Navy retractor – a double-ended, hand-held retractor with two different-sized right-angle blades on opposite ends. Versatile and common in general and orthopedic procedures.

Weitlaner retractor – a self-retaining retractor with sharp or blunt rake prongs that lock open via a ratchet. Once positioned, it holds tissue without an assistant, freeing hands for other tasks. Check that the ratchet locks securely and the prongs are intact—bent or broken prongs must be removed from service.

Needle Holders

Mayo-Hegar needle holder – the most common general surgery needle holder. Has cross-serrated jaws to grip needles firmly and no cutting edge. Heavier construction suits large needles and thick suture.

Crile-Wood needle holder – similar to the Mayo-Hegar but with a lighter, more tapered jaw. Used with finer needles and suture in delicate closures.

Always verify that needle holder jaws meet evenly with no gap, the ratchet holds under gentle pressure, and jaw inserts show no excessive wear (smooth, shiny wear spots reduce grip and cause needles to spin).

Safety Points for Instrument Handling

• Sharp-end awareness: Always carry sharps—scissors, toothed forceps, retractors with sharp prongs—with tips pointed down or contained in a basin. Never hand a sharp instrument tip-first to another person.
• Do not test on skin: Never test sharpness of scissors or tips on your own skin or clothing.
• Inspect before assembly: Each instrument must be inspected for cracks, misalignment, missing parts, and corrosion before being placed in a sterile tray. A defective instrument in a sterile field jeopardizes patient safety.
• Handle by the ring/handle end: During decontamination sorting, hold instruments by handles and keep jaws pointed down into the sink or basin.
• Document defects: Tag defective instruments immediately with a repair tag and remove them from the tray assembly workflow.

Connecting Names to Visual and Tactile Memory

When you encounter an unfamiliar instrument, ask yourself: Does it have a ratchet? (clamp or needle holder) Does it have a spring? (forceps or scissors) Does it have a blade or prongs with no ring handles? (retractor) Then examine jaw shape, tip detail, and overall weight. Cross-referencing physical features with the instrument's name and function is the skill that makes you reliable in the department.