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This page describes products and general use; it is not medical advice.
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A Raytec sponge is a sterile 4 x 4 inch surgical gauze sponge with a built-in X-ray detectable marker, so it shows on an X-ray image if it is ever left inside the body. “Raytec” is the name used for this product type, and the term helps tell this internal-use sponge apart from ordinary 4 x 4 gauze. The Medline 16-ply sterile X-ray detectable 4 x 4 inch sponge listed by McKesson is one example of the type.
What a Raytec sponge is
FDA’s rule for this device class, 21 CFR 878.4450, calls it “nonabsorbable gauze for internal use”: a device made of open mesh fabric used inside the body or a surgical incision, or applied to internal organs or structures, to control bleeding, absorb fluid, or protect organs or structures from abrasion, drying or contamination. The same regulation says the device is woven from material that is at least 50 percent by mass cotton, cellulose or a simple chemical derivative of cellulose, and that it contains X-ray detectable elements (eCFR, checked 2026-11-01).
Who uses it: surgical and procedural teams, clinic staff, buyers and students; the product is identified by its X-ray detectable marker and the 4 x 4 inch size.
How the X-ray detectable marker is built
The marker is a thread or strand added to the sponge. In the example listing for the Medline sponge, the manufacturer text describes “Dual X-ray detectable barium sulfate strands” layered in a figure-8 design, in a cotton, 16-ply gauze (McKesson product listing, checked 2026-11-01). The AccessGUDID device description for the non-woven category says the sponge “contains an x-ray detectable marker [e.g., a thread or strand(s)]” to help detect gossypiboma, a sponge left inside a patient (NLM AccessGUDID, checked 2026-11-01).
Types and variants
The two examples below are individual products, shown to illustrate how the same product type varies. They are not a ranking and not a complete list.
| Example product | Construction | Size and pack | Marker and labeling | Source |
|---|---|---|---|---|
| Medline NON21430LF | Cotton, 16-ply | 4 x 4 in, sterile, 10 per tray | Dual barium sulfate strands in a figure-8 pattern; not made with natural rubber latex | McKesson listing, 2026-11-01 |
| AMD-Ritmed non-woven sponge, 8-ply | Non-woven | 4 x 4 in, sterile pack | X-ray detectable; labeled not made with natural rubber latex | AccessGUDID record 10686864046094, 2026-11-01 |
The AccessGUDID term definition for this device type adds that a non-woven sponge is intended to produce less lint than woven gauze, is single-use, and is also referred to as a laparotomy sponge.
FDA classification and product code
FDA’s product code for this item is GDY, “Gauze/Sponge, Internal, X-Ray Detectable”. openFDA lists GDY as device class 1 under regulation number 878.4450 in the General, Plastic Surgery specialty (openFDA classification database, checked 2026-11-01). Under 21 CFR 878.4450(b) the device is Class I (general controls) and is exempt from premarket notification, subject to the limitations in 21 CFR 878.9. The identification text in 878.4450(a) describes the device as containing X-ray detectable elements; that is the feature that separates it from the ordinary gauze covered in what gauze is.
Raytec sponge compared with related items
- Ordinary gauze: general gauze is described in what gauze is. The internal-use rule above is the one that names X-ray detectable elements.
- Drain sponge: a different sponge type, covered separately in what a drain sponge is.
- Cottonoid: neurosurgical patties, with their own FDA classification, in the cottonoid guide.
- Wound dressings: absorbent external dressings are covered in highly absorbent wound dressings.
Safe use and handling basics
These points come from the records above and are general only. The AccessGUDID description lists this device type as single-use, and the example records are supplied in sterile packaging. Latex status is on the label: both example records state the product is not made with natural rubber latex. Always refer to the manufacturer’s instructions for use.
Common mistakes
- Assuming any 4 x 4 gauze is X-ray detectable. Size alone does not tell you; the product label or listing names the X-ray detectable marker.
- Treating “Raytec” as a single maker’s product. It names a product type, so check the actual manufacturer, ply, pack and latex statement on the label.
- Reading the 21 CFR 878.4450 woven-cotton wording as covering every construction. The AccessGUDID record shows a non-woven product under the same GDY code; check the label for the material.
FAQ
What does “Raytec” mean on a sponge listing?
In distributor listings it identifies an X-ray detectable 4 x 4 inch gauze sponge, for example the Medline 16-ply sterile sponge listed by McKesson.
Is a Raytec sponge FDA regulated?
Yes. FDA classes this device under 21 CFR 878.4450 as Class I (general controls), exempt from premarket notification subject to 21 CFR 878.9, with product code GDY.
What is the marker made of?
The Medline example’s manufacturer text describes dual X-ray detectable barium sulfate strands in a figure-8 design. Other products may use a different thread or strand, so check the label.
Are Raytec sponges made with latex?
Both example records state they are not made with natural rubber latex. Check each product’s label.
Sources
- FDA, 21 CFR 878.4450, Nonabsorbable gauze for internal use, eCFR, checked 2026-11-01.
- National Library of Medicine, AccessGUDID record 10686864046094, checked 2026-11-01.
- FDA, openFDA device classification, product code GDY, checked 2026-11-01.
- McKesson Medical-Surgical, Medline NON21430LF product listing (manufacturer label data), checked 2026-11-01.
