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Medically reviewed by Charles A. DeCook, MD ·

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Specialist review

Nerve freezing / iovera°

Target pain signals with cold. Relief is temporary.

Conceptual metal probe with frost representing controlled cooling
Illustrative concept · not the iovera° device or a procedural guide
01

What could it help with?

Cryoneurolysis uses controlled cold to interrupt nerve pain signals temporarily. A 2017 trial found benefit; a 2025 trial using a different protocol did not meet its primary pain endpoint. [1][2][3]

02

Who might it suit?

For: Selected knee pain, or a discussion with your surgical team about pain control around knee replacement.

Not for: People with cold hypersensitivity or open or infected wounds near the treatment site; other contraindications require clinician screening.

03

Limits and important cautions

The studies used different protocols and follow-up times. Knee OA pain evidence should not automatically be applied to surgical recovery or permanent pain relief.

What happens, how long, and what could it cost?
What happens
A trained clinician uses controlled cooling to treat selected peripheral nerves.
When might I notice a change?
A reliable personal timeline cannot be predicted from the evidence reviewed here. Agree on a review date before starting.
How long might benefit last?
The intended pain interruption is temporary, not permanent joint repair.
Repeat treatment
Ask how response is assessed and what evidence supports repeat treatment for your indication.
Activity and recovery
Ask who provides follow-up, what symptoms need urgent attention, and what restrictions apply to you.
Ask for a complete estimate
Evaluation, procedure, device-related charges, and follow-up.

Use this as a consultation guide. A timeline is not a guarantee; the evidence and FDA sections below remain part of the decision.

Compare expectations side by side ↗

THE EVIDENCE IN CONTEXT

Mixed sham-controlled trial results

Read the 3 selected references
  1. Radnovich et al.: cryoneurolysis for knee OA ↗Sham-controlled randomized trial · 2017

    Found benefit at the primary 30-day endpoint in mild-to-moderate knee OA; one nerve target and device protocol were studied.

  2. Cryoneurolysis for chronic knee OA pain ↗Sham-controlled randomized trial · Anesthesiology · 2025

    No significant benefit at the primary 14-day endpoint with the tested protocol. This was not an identical replication of the earlier trial.

  3. Genicular nerve interventions: randomized-trial synthesis ↗Systematic review · Osteoarthritis and Cartilage · 2025

    Sham comparisons suggested modest short-term RFA benefit, with low-to-very-low certainty and no sustained benefit at later measured time points.

Editorial synthesis · reviewed September 19, 2026. These are selected decision-relevant references, not an exhaustive systematic review or a new formal evidence grade. FDA status and coverage are assessed separately.

FDA status

FDA-cleared · knee OA pain

The iovera° system’s FDA 510(k) clearance includes relief of knee osteoarthritis pain and symptoms for up to 90 days. This is device clearance for pain relief, not approval for cartilage repair. Benefit and duration vary; exact device configuration and labeling matter.

Site summary of FDA information · reviewed September 19, 2026. Refer to current product labeling. This is not an FDA endorsement of this site.
What do professional guidelines say?

ACR: The conditional recommendation for radiofrequency ablation should not be treated as a recommendation for cryoneurolysis.

Will Medicare cover it?

UNSURE for your plan. Coverage depends on the procedure, indication, and local policy; obtain written confirmation.

How we interpret changing evidence