---
kind: "section"
citation: "21 C.F.R. § 870.2770"
title: "21"
number: "870.2770"
heading: "Impedance plethysmograph."
url: "https://uscodex.org/cfr/21/870.2770"
---

# §870.2770. Impedance plethysmograph.

- (a) **Identification.** An impedance plethysmograph is a device used to estimate peripheral blood flow by measuring electrical impedance changes in a region of the body such as the arms and legs.
- (b) **Classification.** Class II (special controls). The device, when it is a body composition analyzer which is not intended to diagnose or treat any medical condition, is exempt from the premarket notification procedures in [subpart E of part 807](/cfr/21/part807-subpartE.md) of this chapter subject to the limitations in [§ 870.9](/cfr/21/870.9.md).

## Notes

### Amendments

[45 FR 7907, Feb. 5, 1980, as amended at 84 FR 71812, Dec. 30, 2019]

### Authority

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

### Source

Source: 45 FR 7907, Feb. 5, 1980, unless otherwise noted.

### Amendments

[45 FR 7907, Feb. 5, 1980, as amended at 84 FR 71812, Dec. 30, 2019]