---
kind: "section"
citation: "21 C.F.R. § 890.1225"
title: "21"
number: "890.1225"
heading: "Chronaximeter."
url: "https://uscodex.org/cfr/21/890.1225"
---

# §890.1225. Chronaximeter.

- (a) **Identification.** A chronaximeter is a device intended for medical purposes to measure neuromuscular excitability by means of a strength-duration curve that provides a basis for diagnosis and prognosis of neurological dysfunction.
- (b) **Classification.** Class II (performance standards).

## Notes

### Authority

Authority: 21 U.S.C. 351, 360, 360c, 360e, 360j, 360 l, 371.

### Source

Source: 48 FR 53047, Nov. 23, 1983, unless otherwise noted.