# Thymidine Kinase Activity
> **Product code: QTE** · Class II — Moderate Risk (510(k) clearance required) · Immunology · 21 CFR 866.6010
## Classification
- **FDA Product Code:** QTE
- **Device class:** Class II — Moderate Risk (510(k) clearance required)
- **Regulation:** 21 CFR 866.6010
- **Review panel:** IM
- **Medical specialty:** Immunology
- **Submission type:** 1
- **GMP exempt:** N
- **Life sustaining:** N
- **Implant:** N
- **Third-party review:** N
## Definition

In vitro test to measure thymidine kinase activity (TKa) to aid in monitoring disease progression of breast cancer patients.

## Market data
- **Cleared 510(k) submissions:** 1
- **Registered establishments:** 1
## Source
- [FDA Device Classification](https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpcd/classification.cfm?ID=QTE)
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