[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR868.1860] [Page 298] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 868_ANESTHESIOLOGY DEVICES--Table of Contents Subpart B_Diagnostic Devices Sec. 868.1860 Peak-flow meter for spirometry. (a) Identification. A peak-flow meter for spirometry is a device used to measure a patient's maximum ventilatory flow rate. (b) Classification. Class II (performance standards).