{"data":{"id":"us/21-cfr-868.1850","jurisdiction":"us","citation":"21 CFR 868.1850","heading":"Monitoring spirometer.","body":"(a) Identification. A monitoring spirometer is a device used to measure continuously a patient's tidal volume (volume of gas inhaled by the patient during each respiration cycle) or minute volume (the tidal volume multiplied by the rate of respiration for 1 minute) for the evaluation of the patient's ventilatory status.\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 868—ANESTHESIOLOGY DEVICES","Subpart B—Diagnostic 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":"dfb70a9229971e54b7a40b2a03f707f8e12c2ff5a33dc58b427310203c43631f","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-868.1840","next":"us/21-cfr-868.1860"},"notice":"GroundRules: Original legal text. Not legal advice."}