Description

The MIC-KEY Low-Profile Gastric-Jejunal (GJ) Feeding Tube from Avanos is a skin-level enteral device placed through a gastric stoma with the distal limb positioned in the jejunum. Retained by an internal inflatable balloon and a low-profile external bolster (button), it supports simultaneous jejunal feeding and gastric decompression/venting for pediatric and adult patients.

Ports and functions

• JEJUNAL (J) port: Post-pyloric feeding; medications may be administered if directed by the care team.
• GASTRIC (G) port: Decompression/venting via gravity or low intermittent suction; avoid continuous or high intermittent suction.
• BAL port: Balloon inflation/deflation only.
• One-way anti-reflux valves in the J and G ports open when an appropriate MIC-KEY extension set is attached; the device does not include a dedicated medication port.

Connectivity and compatibility

• Available in versions compatible with ENFit or legacy catheter-tip feed set connectors.
• ENFit “Kit” variants include MIC-KEY ENFit extension sets for continuous/pump and bolus feeding.
• Use MIC-KEY extension sets to ensure valve activation and connector compatibility.

Key design features

• Clearly marked G and J ports; extension sets engage with a clockwise turn until resistance.
• Weighted jejunal portion to help maintain post-pyloric placement.
• Multiple jejunal exit ports and a tapered distal tip to support flow.
• Radiopaque stripe for imaging visibility.
• Low-profile external bolster for skin-level profile.

Materials and regulatory

• Medical-grade silicone; latex-free.
• Sterile (gamma sterilized).
• Single-use; prescription device (Rx only).

Sizes and options

• Outer diameter (French): 14, 16, 18, 22.
• Jejunal lengths (cm): 15, 22, 30, 45.
• Stoma (shaft) lengths (cm): approximately 1.0 to 7.0 in multiple increments (e.g., 1.0, 1.2, 1.5, 1.7, 2.0, 2.3, 2.5, 2.7, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0); availability varies by diameter.

Balloon inflation guidance

• Use only sterile or distilled water.
• Recommended fill volumes by jejunal length: 15/22/30 cm = 3 mL (maximum 5 mL); 45 cm = 7 mL (maximum 10 mL).
• Do not overinflate; stabilize the tube during inflation/deflation.

Operation and maintenance

• Attach an extension set to open the gastric or jejunal port valves; do not push formula or medication directly through a closed valve.
• Do not rotate GJ tubes; rotation can torque the tube and contribute to retraction into the stomach.
• Flush the feeding tube and extension sets per clinical guidance to reduce clogging.