---
kind: "section"
citation: "21 C.F.R. § 870.2780"
title: "21"
number: "870.2780"
heading: "Hydraulic, pneumatic, or photoelectric plethysmographs."
url: "https://uscodex.org/cfr/21/870.2780"
---

# §870.2780. Hydraulic, pneumatic, or photoelectric plethysmographs.

- (a) **Identification.** A hydraulic, pneumatic, or photoelectric plethysmograph is a device used to estimate blood flow in a region of the body using hydraulic, pneumatic, or photoelectric measurement techniques.
- (b) **Classification.** Class II (performance standards).

## Notes

### 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.