{"data":{"id":"us/21-cfr-868.5935","jurisdiction":"us","citation":"21 CFR 868.5935","heading":"External negative pressure ventilator.","body":"(a) Identification. An external negative pressure ventilator (e.g., iron lung, cuirass) is a device chamber that is intended to support a patient's ventilation by alternately applying and releasing external negative pressure over the diaphragm and upper trunk of the patient.\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 F—Therapeutic 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":"0f0bd63041f75343180b1806b6b5b1d9dc989cc60e14cd2e7206209f9cd613b3","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-868.5925","next":"us/21-cfr-868.5955"},"notice":"GroundRules: Original legal text. Not legal advice."}