[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR870.1660] [Page 306] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 870--CARDIOVASCULAR DEVICES--Table of Contents Subpart B--Cardiovascular Diagnostic Devices Sec. 870.1660 Indicator injector. (a) Identification. An indicator injector is an electrically or gas- powered device designed to inject accurately an indicator solution into the blood stream. This device may be used in conjuction with a densitometer or thermodilution device to determine cardiac output. (b) Classification. Class II (performance standards).