Avanos MIC-KEY Feeding Tubes: G-Tube Buttons, Sizes, Extension Sets & Buying Guide
Choosing the correct feeding tube and replacement supplies is important for patients, caregivers, and healthcare professionals managing enteral nutrition.
Among the most widely recognized enteral feeding products are Avanos MIC-KEY feeding tubes, including low-profile gastrostomy buttons, gastrojejunal feeding tubes, and compatible extension sets.
Unlike traditional gastrostomy tubes that extend outward from the abdomen, MIC-KEY low-profile feeding tubes sit close to the skin and connect to a removable extension set during feeding or medication administration, when permitted by the product instructions.
Whether you're looking for a MIC-KEY button G-tube, trying to understand French sizes, or searching for replacement extension sets, this guide explains the main product types and what to check before ordering.
What Is an Avanos MIC-KEY Feeding Tube?
An Avanos MIC-KEY feeding tube is a medical device designed to provide enteral access for patients who require nutrition, hydration, or medications through a feeding tube.
The MIC-KEY product family includes low-profile gastrostomy and gastrojejunal feeding devices, along with accessories designed for compatible feeding systems.
A low-profile gastrostomy tube is commonly called a:
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MIC-KEY button
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Mickey button G-tube
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Low-profile G-tube
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Gastrostomy button
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Feeding tube button
These names generally refer to the compact, skin-level design of a low-profile gastrostomy feeding device.
The specific device must be selected by a qualified healthcare professional based on the patient's clinical needs and established feeding access.
MIC-KEY Button vs. Traditional MIC G-Tube
Avanos offers both low-profile MIC-KEY feeding tubes and conventional-length MIC gastrostomy tubes.
Although both can provide gastric access for enteral feeding, their external designs and accessories differ.
MIC-KEY vs. MIC G-Tube Comparison
| Feature | MIC-KEY Low-Profile G-Tube | Traditional MIC G-Tube |
|---|---|---|
| External Design | Compact, skin-level button | Longer external tubing |
| Feeding Connection | Compatible detachable extension set | External tube with feeding access port |
| Available Sizes | Multiple French sizes and stoma lengths | Multiple French sizes and tube configurations |
| Retention | Depends on the specific model; commonly a balloon | Depends on the specific model; commonly a balloon |
| Typical Application | Established gastrostomy access where a low-profile device is appropriate | Gastrostomy access requiring a conventional-length device |
| Product Identification | French size, stoma length, part number | French size, tube type, part number |
A MIC-KEY button is not automatically an appropriate replacement for every traditional gastrostomy tube. The device type, tract maturity, size, and clinical suitability must be confirmed by the treating healthcare team.
Understanding MIC-KEY Button Sizes
One of the most important considerations when ordering a MIC-KEY G-tube button is identifying the correct size.
Low-profile feeding tubes are commonly identified by two measurements:
1. French size (Fr) — the outside diameter of the tube.
2. Stoma length (cm) — the length of the device's shaft between the external retention component and the internal retention component, as specified for the product.
These measurements are not interchangeable.
What Does French Size Mean?
French size is a standardized measurement used for medical tubing.
One French unit equals approximately one-third of a millimeter in outside diameter.
For example:
| French Size | Approximate Outside Diameter |
|---|---|
| 12 Fr | 4.0 mm |
| 14 Fr | 4.7 mm |
| 16 Fr | 5.3 mm |
| 18 Fr | 6.0 mm |
| 20 Fr | 6.7 mm |
| 24 Fr | 8.0 mm |
These are general French-size conversions, not measurements of every component of a feeding tube.
What Is MIC-KEY Stoma Length?
Stoma length is the measurement used to select the appropriate shaft length of a low-profile feeding tube.
MIC-KEY buttons are available in multiple stoma lengths, depending on the product model and French size.
For example, two MIC-KEY buttons may both be 18 Fr but have different stoma lengths.
That means they are not necessarily interchangeable.
Important: Stoma length must be measured and confirmed using the manufacturer's recommended method by an appropriately trained healthcare professional. Do not estimate a replacement size based only on the patient's appearance or the outside diameter of an existing tube.
MIC-KEY G-Tube vs. MIC-KEY GJ-Tube
Avanos also manufactures low-profile gastrojejunal feeding tubes, often called MIC-KEY GJ tubes.
Although the external devices may appear similar, G-tubes and GJ-tubes serve different purposes.
What Is a MIC-KEY G-Tube?
A gastrostomy tube provides access to the stomach.
It may be used for prescribed gastric feeding, hydration, or medication administration according to the patient's care plan and product instructions.
What Is a MIC-KEY GJ-Tube?
A gastrojejunal tube provides access to both the stomach and the jejunum, a section of the small intestine.
GJ-tubes generally have separate access ports for gastric and jejunal functions.
They are used when a patient's prescribed therapy requires this type of access.
G-Tube vs. GJ-Tube Comparison
| Feature | MIC-KEY G-Tube | MIC-KEY GJ-Tube |
|---|---|---|
| Access Location | Stomach | Stomach and jejunum |
| Primary Device Type | Gastrostomy tube | Gastrojejunal tube |
| Port Configuration | Gastric access | Separate gastric and jejunal access |
| Size Identification | French size and stoma length | Model-specific French size, stoma length, and jejunal length |
| Replacement Requirements | Follow clinical and manufacturer guidance | Typically requires specialized clinical placement or exchange procedures |
A G-tube should never be substituted for a GJ-tube, or vice versa, without the treating clinician's direction.
What Are MIC-KEY Feeding Tube Extension Sets?
A MIC-KEY extension set is a removable accessory that connects a compatible low-profile feeding tube to an enteral feeding system.
Because a MIC-KEY button sits close to the skin, an extension set is generally needed to connect feeding administration equipment.
Avanos offers different extension set configurations, including options designed for continuous feeding and bolus feeding.
Continuous Feeding Extension Sets
Continuous feeding extension sets are designed for compatible feeding arrangements where nutrition is administered over a prescribed period.
Depending on the specific model, these sets may feature:
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Right-angle connections
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SECUR-LOK connection mechanisms
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ENFit-compatible enteral connectors
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Different tubing lengths
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Y-port configurations
Bolus Feeding Extension Sets
Bolus feeding extension sets are designed for compatible feeding arrangements in which prescribed nutrition is administered intermittently.
They may have different connector configurations and tubing designs than continuous feeding sets.
Continuous vs. Bolus Extension Sets
| Feature | Continuous Feeding Set | Bolus Feeding Set |
|---|---|---|
| Intended Feeding Arrangement | Compatible continuous or intermittent pump-feeding setup | Compatible bolus-feeding setup |
| Connection Design | Often right-angle | Often straight |
| Tubing Length | Varies by part number | Varies by part number |
| Enteral Connector | Model-specific, including ENFit options | Model-specific, including ENFit options |
| Compatibility | Must match the feeding device | Must match the feeding device |
Do not assume that all MIC-KEY extension sets are interchangeable. Verify the exact part number, connection type, and device compatibility.
What Is ENFit and Why Does It Matter?
ENFit is a standardized enteral connector design intended to reduce the risk of misconnections between enteral feeding systems and incompatible medical tubing systems.
ENFit connectors are used in many modern enteral feeding products, including feeding administration sets, extension sets, and related accessories.
When ordering an Avanos feeding tube extension set, check whether the prescribed feeding system uses ENFit connections.
Older feeding equipment and accessories may use different connector designs.
Are All MIC-KEY Extension Sets ENFit-Compatible?
No. Connector compatibility depends on the specific extension set and product configuration.
Some product listings may refer to legacy connectors, while others specifically identify ENFit components.
Before ordering, verify the manufacturer's part number and the connector configuration required by the patient's existing equipment.
Never force incompatible medical connectors together or use an unapproved adapter.
How to Identify the Correct Avanos Feeding Tube Part Number
Avanos manufactures many similar-looking feeding tubes and accessories.
For accurate ordering, the manufacturer's part number is often the most reliable starting point.
Check These Details Before Ordering
For MIC-KEY G-tube buttons:
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Manufacturer part number
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French size
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Stoma length
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Exact device model
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Prescribed retention type and configuration
For MIC-KEY GJ-tubes:
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Manufacturer part number
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French size
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Stoma length
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Jejunal length
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Required port configuration
For MIC-KEY extension sets:
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Manufacturer part number
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Continuous or bolus configuration
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Tubing length
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Connection design
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ENFit or other specified connector configuration
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Compatibility with the existing feeding tube
When possible, refer to the original product packaging, clinical supply order, or device identification information.
Do not select a feeding tube replacement solely from an online photograph.
How Often Do MIC-KEY Feeding Tubes and Extension Sets Need Replacement?
Replacement intervals depend on the exact product, manufacturer instructions, device condition, and the patient's care plan.
A feeding tube and its removable extension set may have different recommended replacement schedules.
Healthcare providers should follow the current instructions for use and the treating clinician's recommendations.
If a feeding tube becomes dislodged, damaged, or nonfunctional, contact the patient's healthcare team promptly. A dislodged tube may require urgent assessment because the gastrostomy tract can begin to close.
Do not attempt to insert or replace a feeding tube without appropriate training and authorization.
Where Can You Buy Avanos MIC-KEY Feeding Tubes and Supplies?
Avanos MIC-KEY feeding tubes and accessories are available through medical supply distribution channels.
Customers may need:
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MIC-KEY low-profile gastrostomy buttons
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MIC gastrostomy tubes
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MIC-KEY GJ feeding tubes
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Continuous feeding extension sets
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Bolus feeding extension sets
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ENFit-compatible enteral feeding accessories
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Other prescribed enteral feeding supplies
Availability, packaging, and prescription requirements vary by product.
For facilities and purchasing departments, supplying the exact manufacturer part number helps distributors identify the correct item and verify availability.
Frequently Asked Questions About MIC-KEY Feeding Tubes
What is a MIC-KEY button?
A MIC-KEY button is a low-profile feeding tube designed to sit close to the skin and provide access to the gastrointestinal tract for prescribed enteral therapy.
Is a Mickey button the same as a G-tube?
A MIC-KEY gastrostomy button is a type of G-tube. However, not all G-tubes are MIC-KEY buttons, and MIC-KEY also offers other device configurations.
What is the difference between a MIC and MIC-KEY feeding tube?
Traditional MIC gastrostomy tubes generally have external tubing, while MIC-KEY low-profile devices have a compact skin-level design that connects to a compatible extension set.
What sizes do MIC-KEY buttons come in?
MIC-KEY low-profile gastrostomy tubes are offered in multiple French sizes and stoma lengths. Available combinations depend on the exact product model.
What is the difference between 14 Fr and 18 Fr?
French size describes outside diameter. An 18 Fr tube has a larger outside diameter than a 14 Fr tube. The appropriate size must be clinically determined.
Do MIC-KEY buttons require extension sets?
Low-profile MIC-KEY buttons generally require compatible extension sets to connect to feeding administration equipment.
Are MIC-KEY extension sets universal?
No. Compatibility depends on the device, extension set configuration, manufacturer part number, and connector type.
What is an ENFit feeding tube connector?
ENFit is a standardized connector system for enteral feeding equipment designed to help reduce tubing misconnections.
Can I replace a MIC-KEY button with a different size?
Changes in French size or stoma length should be directed by the treating healthcare professional. Different sizes are not automatically interchangeable.
Does insurance cover MIC-KEY feeding tubes?
Coverage depends on the patient's insurance plan, medical necessity, applicable benefit rules, documentation, and supplier participation. Patients should verify coverage with their insurer and medical supply provider.
Shop Avanos Feeding Tubes and Enteral Supplies at Lexicon Medical Supply
Looking for Avanos MIC-KEY feeding tubes, extension sets, or replacement enteral supplies?
Lexicon Medical Supply helps healthcare facilities, medical professionals, and customers source a wide range of medical supplies.
Whether you need a specific MIC-KEY G-tube button, MIC gastrostomy tube, ENFit extension set, or other enteral feeding accessory, our team can help with product inquiries and availability requests.
For the most accurate assistance, please have the manufacturer's part number, prescribed size, and required quantity available.
Visit Lexicon Medical Supply to explore our medical supply selection or contact our team about Avanos feeding tube products.
Medical disclaimer: This article is for general education and product identification. It is not a substitute for professional medical advice. Feeding tube selection, sizing, placement, replacement, and clinical use must follow the treating healthcare professional's instructions and current manufacturer guidance. Product availability and insurance coverage are subject to verification.
