What Do Surgical Staple Colors Mean?

Surgical staples are critical tissue closure devices in modern surgery, and their performance and specifications are directly related to surgical safety and anastomotic quality. The color of surgical staples is not merely an aesthetic feature, but rather a standardized “coding system” developed based on industry consensus. It enables rapid identification of staple height, wire diameter, and suitable tissue types, thereby facilitating standardized and precise instrument selection.

At present, leading manufacturers (such as Johnson & Johnson, Medtronic, and Covidien) may have slight variations in specific parameters, but they generally follow a consistent color-coding logic. Common colors include white, blue, gold, and green, along with additional variants such as gray and orange. Each color corresponds to specific structural parameters and clinical indications, effectively serving as a “functional label” for surgical staples.

I. Color–Specification–Clinical Application Mapping of Surgical Staples

White

• Staple height: ~2.5 mm

• Wire: Fine

• Indicated tissues: Low-thickness tissues (e.g., blood vessels, small intestine, mucosa)

• Clinical applications: Vascular anastomosis, small bowel anastomosis, gastrointestinal mucosal closure

• Features: Enables precise closure while minimizing damage to thin-walled tissues

Blue

• Staple height: ~3.0–3.5 mm

• Wire: Medium

• Indicated tissues: Medium-thickness tissues (e.g., lung, gastric body, colorectal tissue)

• Clinical applications: Pulmonary wedge resection, lobectomy, routine gastrointestinal anastomosis

• Features: Broad applicability; one of the most commonly used specifications

  
  

  

Gold

• Staple height: ~4.0 mm

• Wire: Medium-thick

• Indicated tissues: Tissues with variable thickness (e.g., stomach in bariatric surgery)

• Clinical applications: Metabolic/bariatric procedures and complex tissue anastomosis

• Features: Provides adaptability and stability in tissues with uneven thickness

Green

• Staple height: ~4.8 mm

• Wire: Thick

• Indicated tissues: Thick-walled tissues (e.g., trachea, pylorus, low rectum)

• Clinical applications: Tracheal reconstruction, pyloric closure, low rectal anastomosis

• Features: High tensile strength, suitable for high-stress anatomical sites

  
  

  

Gray

• Staple height: ~2.0 mm

• Wire: Ultra-fine

• Indicated tissues: Ultra-delicate structures (e.g., microvessels, neural epineurium)

• Clinical applications: Microsurgery and nerve anastomosis

• Features: Minimizes tissue trauma to the greatest extent

II. Core Principles of Color Coding

The color of surgical staples is essentially a visual representation of their structural parameters, primarily reflected in the following aspects:

1. Staple Height
General trend: the darker the color, the greater the staple height, and the thicker the tissue it can accommodate.
For example: White (~2.5 mm) < Blue (~3.5 mm) < Gold (~4.0 mm) < Green (~4.8 mm).

2. Wire Thickness
The darker the color, the thicker the wire and the greater the closure strength.
Thicker wires are suitable for high-tension, thick-walled tissues, whereas finer wires are better suited for thin and fragile tissues to avoid cutting or tearing.

III. Common Misconceptions in Clinical Practice

Misconception 1: Lighter colors indicate weaker closure strength
In reality, color reflects suitability rather than a simple strength hierarchy. For example, although white staples use fine wire, they provide safer and more effective closure in thin-walled tissues such as blood vessels.

Misconception 2: The same color always represents identical specifications
There may be variations among manufacturers (e.g., slight differences in staple height), and the same color may correspond to different cartridge lengths (e.g., 30 mm, 45 mm, 60 mm). Therefore, clinical selection should consider color, length, and detailed product specifications rather than relying on color alone.