{"data":{"id":"us/21-cfr-864.5950","jurisdiction":"us","citation":"21 CFR 864.5950","heading":"Blood volume measuring device.","body":"(a) Identification. A blood volume measuring device is a manual, semiautomated, or automated system that is used to calculate the red cell mass, plasma volume, and total blood volume.\n(b) Classification. Class II (performance standards).","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 864—HEMATOLOGY AND PATHOLOGY DEVICES","Subpart F—Automated and Semi-Automated Hematology 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":"73077e4cdcc21803cc75d4153c1d546814bd05367da58ad5a07e5943b6d57ab7","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-864.5850","next":"us/21-cfr-864.6100"},"notice":"GroundRules: Original legal text. Not legal advice."}