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An antimicrobial catheter is a catheter with an antimicrobial or antiseptic agent bound to or impregnated in its material. This guide is for clinic staff, buyers and students who need to read a coated-catheter specification: it sets out the coating types named in CDC and FDA documents, where on the device each coating sits, and what FDA guidance says the label should state.
What an antimicrobial catheter is
CDC’s Guidelines for the Prevention of Intravascular Catheter-Related Infections (2011, last updated October 2017) uses the terms “antimicrobial/antiseptic impregnated catheters” for central venous catheters (CVCs) carrying an agent such as chlorhexidine/silver sulfadiazine or minocycline/rifampin. FDA regulates a separate family of antimicrobial urinary catheters: the product classification database lists code MJC, “Catheter, urological (antimicrobial) and accessories”, under 21 CFR 876.5130, Class 2. The phrases silver coated catheter, catheter coating and antimicrobial central venous catheter all describe parts of these two families. Who uses them: clinicians who place and maintain catheters, and infection-prevention and supply staff who specify them.
For the uncoated basics, see what a central venous catheter is and what a Foley catheter is.
How the coating is built into the device
Coatings differ by where the agent sits. The CDC guideline describes a first-generation chlorhexidine/silver sulfadiazine catheter as coated “only on the external luminal surface”. A second-generation version has chlorhexidine coating “the internal surface extending into the extension set and hubs”, while the external surface carries chlorhexidine and silver sulfadiazine; the guideline states the external surface has three times the amount of chlorhexidine of the first generation. Minocycline/rifampin catheters are impregnated on both the external and internal surfaces. Lumen layout matters for the internal coating; see catheter lumens.
Coating types
Chlorhexidine and silver sulfadiazine (a silver coated catheter)
The silver in this coating is silver sulfadiazine, paired with chlorhexidine. The CDC guideline notes that, although rare, anaphylaxis with these catheters has been observed.
Minocycline and rifampin
This coating combines two antibiotics and is described in the guideline for both external and internal surfaces.
Platinum and silver
The guideline describes a platinum/silver (silver iontophoretic) catheter as available in the United States and states that a firm recommendation for or against its use cannot be made.
| Coating | Device family in source | Where the agent is | Source |
|---|---|---|---|
| Chlorhexidine/silver sulfadiazine, first generation | Central venous | External luminal surface only | CDC 2011 guideline |
| Chlorhexidine/silver sulfadiazine, second generation | Central venous | Internal surface into extension set and hubs (chlorhexidine); external surface (chlorhexidine and silver sulfadiazine) | CDC 2011 guideline |
| Minocycline/rifampin | Central venous | External and internal surfaces | CDC 2011 guideline |
| Platinum/silver (silver iontophoretic) | Central venous | Not specified in the guideline; no firm recommendation for or against | CDC 2011 guideline |
| Antimicrobial urological catheters | Urinary (Foley) | FDA guidance asks the label to state the type of coating | FDA product code MJC; FDA Foley guidance |
What the label should state
FDA’s guidance on premarket notifications for conventional and antimicrobial Foley catheters (September 1994, status final; content current as of 23 March 2018) predates the agency’s Good Guidance Practices, and it sets out labeling expectations for the urinary family. The guidance lists these labeling items for the urinary family:
- A statement on the label that the antimicrobial is an active agent (a prophylactic intended use, not a preservative).
- Labeling that characterizes the antimicrobial and its activity.
- The type of coating, if applicable, on the package label.
- The amount or concentration of the antimicrobial agent on the package label when it is an ingredient.
- For reusable antimicrobial catheters, the validated number of safe and effective reuse cycles.
The guidance also states that antimicrobial-coated catheters fall outside ASTM F 623-89. For the urinary family in context, see urinary catheter types and selection.
Population and approval limits in the CDC guideline
The CDC guideline records the scope of the evidence behind these catheters. Nearly all studies used triple-lumen, uncuffed catheters in adults with catheters in place under 30 days. It states that the chlorhexidine/silver sulfadiazine and minocycline/rifampin catheters have been approved by FDA for patients weighing more than 3 kg, and that no antiseptic or antimicrobial impregnated catheters are currently available for infants weighing under 3 kg. The guideline also notes that these catheters are more expensive than standard catheters.
Labels and handling basics
- Follow the manufacturer’s instructions for use for the specific product; coating, materials and indications differ by model.
- Check the label for the coating type and agent. The CDC guideline notes that, although rare, anaphylaxis with chlorhexidine/silver sulfadiazine catheters has been observed.
Common mistakes
- Treating “silver” as one thing: silver sulfadiazine and platinum/silver are different coatings in the CDC text.
- Assuming the coating covers the whole flow path: the first-generation chlorhexidine/silver sulfadiazine design was external only.
- Reading the CDC study populations as the approved range: the studies were mostly adult and short-dwell, while the FDA approval the guideline cites is stated by weight (above 3 kg).
- Assuming any one product page applies to another: related devices are covered in central line kits, antimicrobial dressings and PVC catheters.
Supply staff can browse IV catheters as a category.
FAQ
What is an antimicrobial catheter?
A catheter whose material carries an antimicrobial or antiseptic agent. CDC’s guideline covers central venous versions; FDA product code MJC covers antimicrobial urological catheters (Class 2, 21 CFR 876.5130).
What is a silver coated catheter?
The CDC guideline names two silver-containing designs: chlorhexidine/silver sulfadiazine, and platinum/silver (silver iontophoretic), for which it makes no firm recommendation either way.
What are catheter coatings?
Agents applied to or impregnated in a catheter: chlorhexidine/silver sulfadiazine, minocycline/rifampin and platinum/silver in the CDC text. The surfaces covered vary by product, per the table above.
What is an antimicrobial central venous catheter?
A CVC with one of those agents on its external surface or on both external and internal surfaces. CDC states FDA approval for patients weighing more than 3 kg.
Sources
- CDC, Guidelines for the Prevention of Intravascular Catheter-Related Infections (2011), last update October 2017; date checked 2026-10-30.
- FDA, Content of Premarket Notifications for Conventional and Antimicrobial Foley Catheters; date checked 2026-10-30.
- FDA, Product classification, code MJC; date checked 2026-10-30.
