The Recall Desk
SevereFDA (Devices)·Z-2133-2026·Announced 2026-05-20

On-X Mitral Heart Valve Model ONXMC-25/33 Released Without Complete Testing

On-X Life Technologies is recalling the On-X Mitral Heart Valve with Conform-X Sewing Ring, Model ONXMC-25/33, because the valves were distributed before all required testing was complete, preventing confirmation that they meet all release specifications.

What this means for you

Illness, injury, or structural failure has been reported. Stop using the product immediately and contact the manufacturer for a refund or repair.

Our severity reasoning: This is an FDA Class II recall involving a critical life-sustaining implantable device (heart valve) that was distributed without completion of required testing. The inability to confirm the valve meets all release specifications represents a significant potential risk for an implanted cardiac device.

Plain-English summary

On-X Life Technologies, Inc. is recalling the On-X Mitral Heart Valve with Conform-X Sewing Ring, Model ONXMC-25/33. The recall affects 10 units distributed internationally to South Korea.

The valves were released and distributed before all required testing was completed. Because testing was incomplete, it cannot be confirmed that the heart valves meet all required release specifications.

Patients and healthcare providers who have received or implanted these valves should contact On-X Life Technologies, Inc. for further guidance. The affected serial numbers are A2013401, A2013402, A2013403, A2013404, A2013405, A2013407, A2013408, A2013409, A2013410, and A2013411, with an expiration date of December 17, 2031.

The recalled product

Product
On-X Mitral Heart Valve with Conform-X Sewing Ring, Model: ONXMC-25/33
Manufacturer
On-X Life Technologies, Inc.
Hazard
  • incomplete-testing
  • specification-compliance-unknown

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Lot numbers (10)

  • UDI-DI: 00851788001303. Serial Numbers: A2013401
  • A2013402
  • A2013403
  • A2013404
  • A2013405
  • A2013407
  • A2013408
  • A2013409
  • A2013410
  • A2013411. Expiration: 2031Dec17

Distribution

Distribution scope not specified by the agency.