{"data":{"id":"us/21-cfr-870.2770","jurisdiction":"us","citation":"21 CFR 870.2770","heading":"Impedance plethysmograph.","body":"(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.\n(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 of this chapter subject to the limitations in § 870.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 870—CARDIOVASCULAR DEVICES","Subpart C—Cardiovascular Monitoring Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"effff6113b44508ccaf64f8a340fe78a43a9b90c7a3f3be36ed79eebcc949e04","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-870.2750","next":"us/21-cfr-870.2780"},"notice":"GroundRules: Original legal text. Not legal advice."}